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Factors Affecting Soil Phosphate Distribution and Reactions in Cape Forest Soils
Item type: Journal Article • Journal: South African Forestry Journal • Authors: T.W. Payn --- Saasveld Forestry Research Centre, M.E. Clough --- Saasveld Forestry Research Centre,The amounts of various forms of phosphate in some Cape soils and the adsorption of phosphate by these soils were investigated. The levels were low and only 2% was in available form. The major fraction of phosphate in the soil... -
Influence of Soil Organic Matter Content on the Responsiveness of Eucalyptus grandis to Nitrogen Fertiliser
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A.D. Noble --- Institute for Commercial Forestry Research, South Africa M.A. Herbert --- Institute for Commercial Forestry Research, South AfricaIt is widely recognised that the inherent nitrogen (N) mineralisation capacity of a soil is directly related to the organic matter content. Consequently, in estimating the N requirements of Eucalyptus grandis at planting this mineralisation potential must be taken into... -
The Influence of Site Factors on the Foliar Nutrient Content of Eucalyptus grandis in Natal
Item type: Journal Article • Journal: South African Forestry Journal • Authors: M.A. Herbert --- Institute for Commercial Forestry Research, South AfricaAlthough foliar analysis is commonly used to diagnose the nutritional status of trees and their ability to respond to fertilising, it is also a measure of site type and quality. The availability of nutrients in the soil varies with climatic... -
Site Evaluation in Black Wattle with Special Reference to Soil Factors
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- Silviculture Section, Institute for Commercial Forestry Research, South Africa W. J.K. Aldworth --- Silviculture Section, Institute for Commercial Forestry Research, South AfricaTogether with climate, soil characteristics are the most important factors affecting tree growth. However, the attempts in many site evaluation studies to establish a direct relationship between soil factors and tree growth have not been very successful, the exception being... -
The Response of Ocotea bullata (Lauraceae) to Flooded Conditions
Item type: Journal Article • Journal: South African Forestry Journal • Authors: W.A. Lübbe --- Saasveld Forestry Research Centre, Division of Forest Science and Technology,The response of Ocotea bullata (Lauraceae), stinkwood, grown under a range of flooded conditions, was studied. Flooding results in chlorosis and shedding of leaves and may end in death if continued for prolonged periods. Die-back is the result of several... -
Variable Effects of Glyphosate and Triclopyr Used for the Control of American Bramble, Rubus cuneifolius agg, in Pine Plantations
Item type: Journal Article • Journal: South African Forestry Journal • Authors: R.P. Denny --- Cedara Weeds Laboratory, J.M. Goodall --- Cedara Weeds Laboratory,American bramble, Rubus cuneifolius agg, is a weed in pine plantations but information about the efficacy and long-term effects of herbicides is limited. Two trials are described in which observations continued for five and three years respectively. In the first... -
Geno-Phenotypic Regression and Juvenile-Mature Correlations: Methodological Tools for Clonal Selection of Eucalyptus Hybrids in Congo
Item type: Journal Article • Journal: South African Forestry Journal • Authors: Jean-Marc Bouvet --- Centre Technique Forestier Tropical Department of the CIRAD, FranceThis paper discusses different ways to improve clonal selection and clonal variety propagation for the industrial plantations in Congo. -
Preparation of Moulding Resins from Inexpensive By-products: Substitution of Phenol Novolac with Unmodified Lignin in Moulding Resin and its Effect on Physical Properties of Mouldings
Item type: Journal Article • Journal: South African Forestry Journal • Authors: R.E. Ysbrandy --- Department of Wood Science, Republic of South Africa G. F.R. Gerischer --- Department of Wood Science, Republic of South Africa R.D. Sanderson --- , Republic of South AfricaMouldings of 25% resin content were prepared. Substitution of phenol novolac with various ratios of unmodified bagasse lignin was investigated. The effect of lignin incorporation on tensile and dimensional stability properties of mouldings was then studied. Low levels of lignin... -
Seasonal Fluctuations and Diversity of Bark and Wood-boring Beetles in Lowland Forest: Implications for management Practices
Item type: Journal Article • Journal: South African Forestry Journal • Authors: S.S. Madoffe --- Department of Forest Biology, A. Bakke --- , Ås; NorwayThe phenology and diversity of wood-living beetles attacking Cedrela mexicana, Khaya nyasica and Milicia excelsa were observed for one year with weekly window-flight-trap collections. A total of 150 species (10 known to be common pests of timber) were collected, most... -
Laboratory Technique for the Development and Evaluation of Moulded Resinous Composites
Item type: Journal Article • Journal: South African Forestry Journal • Authors: R.E. Ysbrandy --- Dept. of Wood Science, G. F.R. Gerischer --- Dept. of Wood Science, R.D. Sanderson --- , Republic of South AfricaTwo procedures of resin moulding powder preparation were evaluated. Their results are discussed on the basis of their tensile properties for moulded dumb-bells. The best procedure was then implemented for future work on phenolated pitch/ligin systems. Mouldings of different resin... -
Preparation of Binders from Inexpensive By-products for Use in High-Pressure Phenolic Laminates: Reactive Phenosolvan Pitch-Lignin Derived Products for Use in Impregnating Varnishes and Testing of 6-Ply Hessian-Paper Laminates
Item type: Journal Article • Journal: South African Forestry Journal • Authors: R.E. Ysbrandy --- Department of Wood Science, G. F.R. Gerischer --- Department of Wood Science, R.D. Sanderson --- , Republic of South AfricaEqual mixtures of phenosolvan pitch and autohydrolysis bagasse lignin in the presence of either acid or alkaline catalyst and without catalyst were submitted to a thermal treatment stage at 230°C (Phenolation). Each of the phenolated products was mixed with phenol... -
The Blackwood Group System: its relevance for sustainable forest management in the southern Cape
Item type: Journal Article • Journal: South African Forestry Journal • Authors: CoertJ. Geldenhuys --- Division of Water, Environment and Forestry Technology, Southern AfricaThe invasion status of Australian blackwood, Acacia melanoxylon, is assessed against its value as a commercial tree in the southern Cape forests. The species was introduced from Australian rain forests and planted extensively in the southern Cape forests since 1909... -
The effect of nitrogen on the development and photosynthetic activity of digitaria eriantha steud. subsp. eriantha
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: MaureenM. Wolfson --- Department of Botany, C.F. Cresswell --- Department of Botany,Digitaria eriantha Steud. subsp. eriantha, plants were grown under controlled conditions and treated with different concentrations and forms of nitrogen. The plants showed a preference for nitrate nitrogen, as opposed to ammonium nitrogen, with greater total dry matter production and... -
The production, digestibility and chemical composition of five ecotypes of Anthephora pubescens Nees on three soil types
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.H. Fourie --- Department of Agriculture (Free State Region), L.G. Du Pisani --- Department of Agriculture (Free State Region), MagariethaA. Baard --- Department of Agriculture (Free State Region),Production, digestibility of OM and chemical composition of five promising Anthephora pubescens Nees ecotypes (VH4, VH7, VH9, VH17 and VH20) at two fertiliser levels were compared on a soil of the Mangano, Annandale and Sunbury series. -
Long term nitrogen and phosphorus application to veld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.H. Donaldson --- , G. Rootman --- , D. Grossman --- Department of Agriculture,The long term effects of a 5N x 3P factorial fertilizer application trial on hay yields, botanical composition and soil properties of veld are presented. Significant increases in hay yields were recorded during most years. There was a strong correlation... -
Afloopstudies vanaf natuurlike veld in verskillende suksessiestadia van die sentrale oranje‐vrystaat
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H.A. Snyman --- Department Weidingsleer, D.P.J. Opperman --- Department Weidingsleer,Afloopbane met ‘n helling van 4,13% is gebruik om die afloopverliese, fitomassaproduksie en waterverbruiksdoel‐treffendheid (WVD: Bogrondse fitomassa geproduseer in verhouding tot die evapotranspirasieverliese), van natuurlike veld in verskillende suksessiestadia vir die periode Julie 1977 tot Junie 1983 te monitor. -
A national range inventory for the Kingdom of Lesotho ‘n nasionale opname van die weivelde van die koningkryk van Lesotho
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N.L. Martin --- Land Conservation and Range Development Project,With the need for an understanding of the nation's rangelands, the Division of Range Management of the Kingdom of Lesotho has undertaken a national range inventory. This resource study has utilized as aids in this task, the up‐to‐date techniques of... -
The ecological potential of the kudu for commercial production in savanna regions
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Owen‐Smith --- Centre for Resource Ecology,This paper considers the choice of a browsing ungulate to supplement cattle in savanna regions susceptible to problems of bush encroachment, and evaluates the kudu in particular. Relevant aspects of its ecology considered include (i) the vegetation components utilized at... -
Influence of stocking rate and grazing systems on available grazing in the northern cape1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.H. Fourie --- Department of Agriculture (Free State Region), D.P.J. Opperman --- Department of Pasture Science, B.R. Roberts --- Department of Pasture Science,The influence of rotational and continuous grazing systems, each applied with four stocking rates, on the above‐ground phytomass of veld was determined over four years. -
Conserving rangeland resources die bewaring van veldhulpbronne
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M.T. Mentis --- Department of Botany,The aims of the paper are to (1) identify the properties of conservation, (2) explain its poor implementation, and (3) propose remedies. -
The dynamics of Themeda Triandra tillers in relation to burning in the natal Drakensberg
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.S. Everson --- Department of Environment Affairs, TheresaM. Everson --- Department of Environment Affairs, N.M. Tainton --- Department of Grassland Science,Marked tillers of Themeda triandra were sampled regularly over a two year period in Highland Sourveld burnt annually in winter, biennially in spring and after a single summer and early winter burning treatment. Parameters recorded were height of shoot apex,... -
Influence of soil pH and fertilization on the dry matter production, chemical composition and digestibility of perennial grasses: I. Anthephora pubescens nees1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: L G DuPisani --- Department of Agriculture & Water Supply (Free State Region), W L J Van Rensburg --- Department of Pasture Science, D P J Opperman --- Department of Pasture Science,The influence of soil pH and fertilization (N, P and Zn) on the dry matter (DM) production, chemical composition (crude protein, P, K, Ca, Mg and Zn content) and organic matter (OM) digestibility of Anthephora pubescens Nees was evaluated in... -
The influence of stocking rate and grazing system on the crude protein content and digestibility of Tarchonanthus veld in the northern cape1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J H Fourie --- Department of Agriculture (Free State Region), E A N Engels --- Department of Agriculture (Free State Region), HeilaL H C DeBruyn --- Department of Agriculture (Free State Region),Four stocking rates (10, 7, 6 and 4 ha/large stock unit), in both rotational and continuous grazing, have been applied with cattle on Tarchonanthus veld. The crude protein content and digestibility of organic matter of handcut samples and herbage samples... -
Herbage intake by cattle on tarchonanthus veld in the Northern Cape as affected by stocking rate and grazing system1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J H Fourie --- Department of Agriculture (Free State Region), E A N Engels --- Department of Agriculture (Free State Region), B R Roberts --- Department of Pasture Science,In a trial with young Bonsmara cattle, four different stocking rates (10, 7, 6 and 4 ha/large stock unit) were applied in both a rotational and continuous grazing system. Feed intake was estimated during spring, summer, autumn and winter for... -
Influence of soil PH and fertilization on the dry matter production, chemical composition and digestibility of perennial grasses : II panicum maximum JACQ1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: L G Du Pisani --- Department of Agriculture and Water Supply (Free State Region), W L J Van Rensburg --- Department of Pasture Science, D P J Opperman --- Department of Pasture Science,The influence of soil pH and fertilization (?, ? and Zn) on the dry matter (DM) production, chemical composition (crude protein, P, K, Ca, Mg and Zn content) and organic matter (OM) digestibility of Panicum maximum Jacq. was evaluated in... -
Fertilization of southern tall grassveld of natal: Effects on botanical composition and utilization under grazing
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.R. Barnes --- Department of Grassland Science, D.I. Bransby --- Department of Grassland Science, N.M. Tainton --- Department of Grassland Science,The long‐term effects of nitrogen, phosphate and lime on change in botanical composition and utilization under grazing of Southern Tall Grassveld of Natal are presented. Nitrogen, phosphate, lime and type of nitrogen affected botanical composition significantly. Generally, fertilization had the... -
Fertilizer requirements and production of Anthephora pubescens nees on a soil of the mangano series in the northern cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.H. Fourie --- Department of Agriculture and Water Supply, L.G. Du Pisani --- Department of Agriculture and Water Supply, C.H. Donaldson --- Department of Agriculture and Water Supply,The reaction of Anthephora pubescens to N, P and K fertilization was evaluated from 1976 to 1983. Dry matter production at N levels of 0; 75 and 150 kg/ha were 1,9; 2,2 and 2,3 ton/ha respectively. This relative poor reaction... -
Variation in important pasture grasses: I. Morphological and geographical variation
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.E. Gibbs Russell --- Department of Agriculture and Water Supply, J.J. Spies --- Department of Agriculture and Water Supply,Seven species are important pasture grasses throughout the western Transvaal, Orange Free State, northern Cape and Natal. Taxonomically, each is a widely distributed species complex with a range of morphological variants and many ecotypes. The local forms well suited to... -
Variation in important pasture grasses. II. Cytogenetic and reproductive variation
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.J. Spies --- Department of Agriculture and Water Supply, G.E. Gibbs Russell --- Department of Agriculture and Water Supply,The chromosome numbers and reproductive variation of seven important pasture grasses from South Africa are compared. This comparison indicates that all these species form polyploid complexes, all reproduce both sexually and either apomictically or vegetatively, and some form of hybridization... -
The effect of continuous and rotational grazing of sourveld on the selection of plant fractions by simmentaler heifers
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: U.P. Kreuter --- Department of Grassland Science, N.M. Tainton --- Department of Grassland Science,In a grazing trial conducted at the Kokstad Agricultural Research Station, the selection of six plant fractions by cattle grazing sourveld was investigated. Relations between the selectivity of the cattle and the dry matter digestibility (DMD) and crude protein (CP)... -
Vegetation response to wagon wheel camp layouts
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: YvetteJ. Stroleny --- Botany Department, Republic of South Africa M.T. Mentis --- Botany Department, Republic of South AfricaWagon wheel camp layouts have been favoured, in some quarters, for rotational grazing due to the economy and convenience of having the camps radially arranged around central facilities. A possible disadvantage of such layouts is the tendency for over‐grazing near... -
Climatic and edaphic conditions at eragrostis lehmanniana nees sites in Arizona, USA and the cape province, RSA and potential seeding sites in Southern Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: JerryR. Cox --- U.S. Department of Agriculture, USA J.L. Stroehlein --- Soil and Water Department, USA J.H. Fourie --- , Republic of South AfricaClimatic and edaphic conditions at Eragrostis lehmanniana Nees sites in southeastern Arizona, USA were compared with those in the Cape Province, RSA to determine a range of conditions under which the species might be expected to establish and persist in... -
Evapotranspirasie en waterverbruiksdoeltreffendheid van verskillende grasspesies in die sentrale Oranje‐Vrystaat
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H.A. Snyman --- , Republiek van Suid‐AfrikaEvapotranspiration and water use efficiency of different grass species in the central Orange Free State. Evapotranspiration (Et) and water use efficiency (WUE) were determined for each of seven grass species during the 1986/87 and 1987/88 seasons. The highest and lowest... -
Some effects of termitaria on veld in the eastern Cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: T.D. Steinke --- Department of Botany, Republic of South Africa L.O. Nel --- Department of Agriculture (Eastern Cape Region), Republic of South AfricaA survey was conducted to determine some effects of termite mounds on the veld. Termitaria were found to occupy approximately 0,4% of the area of the paddock under investigation. Growth of grasses immediately surrounding intact termitaria increased as shown by... -
Voluntary intake of several planted pastures by sheep and an assessment of NDF and IVDOM as possible predictors of intake
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H.H. Meissner --- Department of Livestock Science, Republic of South Africa W.A. van Niekerk --- Department of Livestock Science, Republic of South Africa E.B. Spreeth --- Department of Livestock Science, Republic of South Africa H.H. Köster --- Department of Livestock Science, Republic of South AfricaThe aim was to study the quality and quantity of pasture selected by sheep on various planted pastures. A further aim was to assess NDF and IVDOM as easy measurable parameters for use in equations to predict intake. Pasture samples... -
Influence of phosphatic fertilization on the yield and chemical composition of grass pasture
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N.F.G. Rethman --- Department of Agriculture & Water Supply, Republic of South Africa B.H. Beukes --- Department of Agriculture & Water Supply, Republic of South AfricaWhile the distribution of P fertilizer had an insignificant influence on the DM production of a grass pasture over a three‐year period, the level of both N and P was highly significant. Growth patterns were unaffected by any of the... -
The effects of continuous and rotational grazing of sourveld on the quality of herbage selected by Simmentaler heifers
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: U.P. Kreuter --- Department of Grassland Science, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaA grazing trial was conducted at the Kokstad Agricultural Station to compare the dry matter digestibility (DMD) and crude protein content (CP) of diets selected by four fistulated cattle which were continuously and rotationally grazing sourveld. Two stocking rates of... -
The application of various chemicals to cuts made in the stem bases of Brachystegia spiciformis Benth., Julbernardia globiflora (Benth.) Troupin and Terminalia sericea Burch. ex DC.
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: W.R. Teague --- , Zimbabwe DianeM. Killilea --- , ZimbabwePicloram‐potassium and various mixtures of picloram with 2,4‐D amine, 2,4,5‐T ester or amine, or 2,4,5‐T ester alone were injected into incisions made in the cambium of standing Brachystegia spiciformis and Julbernardia globiflora trees. Each arboricide was tested at a range... -
The effect of source of nitrogen on the dry matter yield, nitrogen and nitrate‐N content of Lolium multiflorum
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: R.J. Eckard --- Department of Agriculture and Water Supply (Natal Region), Republic of South AfricaThree sources of N fertilizer (urea, limestone ammonium nitrate (LAN) and ammonium sulphate) showed no consistent significant trends in terms of the dry matter yield and nitrogen or nitrate‐N content of midmar ryegrass. Ammonium sulphate was found to acidify the... -
A survey of grazed and ungrazed grassland in the south‐eastern Transvaal highveld 2. Potential floristic composition and patterns of degradation
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.L. Barnes --- Department of Agricultural Development (Transvaal Region), Republic of South AfricaThe floristic composition of selected veld communities which, by virtue of their location were ungrazed but regularly burned, and which were judged to reflect potential floristic composition, was measured at 112 sites in the southeastern Transvaal highveld. Relevant environmental parameters... -
Die invloed van bemesting op die spesiesamestelling en basale bedekking van beweide veld in die Potchefstroom‐omgewing
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: FranciP. Janse van Rensburg --- Departement Landbou en Watervoorsiening, Republiek van Suid‐Afrika R.H. Drewes --- Departement Landbou en Watervoorsiening, Republiek van Suid‐Afrika J.W. Cilliers --- Departement Landbou en Watervoorsiening, Republiek van Suid‐Afrika A.C. Beckerling --- Departement Landbou en Watervoorsiening, Republiek van Suid‐AfrikaThe impact of fertilization on veld in the Potchefstroom area was investigated. Nitrogen and phosphorus were applied annually from 1972/73 until 1981/82. The control plots and the fertilized plots were grazed with year‐old steers. Species composition and basal cover were... -
Responses of Italian ryegrass to phosphorus on highly‐weathered soils
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Miles --- Department of Agricultural Development, Republic of South Africa R.J. Eckard --- Department of Agricultural Development, Republic of South Africa J.M. deVilliers --- Department of Agronomy, Republic of South AfricaItalian ryegrass (Loliwn multiflorum cv. Midmar) responses to fertilizer P were studied in field experiments under irrigation on highly‐weathered ferrallitic soils at two localities in Natal. Each experiment was conducted over two seasons (1985 and 1986), the pasture being re‐established... -
Habitat preferences of twenty‐three grass species in the Bankenveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: F.P. Jordaan --- Department of Agricultural Development, Highveld Region, Republic of South Africa A.S. de Beer --- Department of Agricultural Development, Highveld Region, Republic of South AfricaSome grass species occur more frequently in certain habitats than in others. There is, however, uncertainty as to exactly which factors are responsible for this phenomenon. Species composition as well as habitat data were collected from plots situated on the... -
Defoliation effects on resource allocation in Arizona cottontop (Digitaria californica) and Lehmann lovegrass (Eragrostis lehmanniana)
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: JerryR. Cox --- , Republic of South Africa M. Giner‐Mendoza --- , Mexico A.K. Dobrenz --- Plant Sciences Department, United States of America MarieF. Smith --- , Republic of South AfricaArizona cottontop (Digitaria californica), a bunchgrass native to the Chihuahuan and Sonoran Deserts in North America, and Lehmann lovegrass (Eragrostis lehmanniana), a bunchgrass introduced to the southwestern USA from southern Africa, were defoliated and examined for above‐ and below‐ground productivity,... -
Relations between woody and herbaceous components and the effects of bush‐clearing in southern African savannas
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: W.R. Teague --- , Republic of South Africa G.N. Smit --- , Republic of South AfricaThe relations between woody and herbaceous plants in southern African savannas are reviewed in the context of pastoral use. Current knowledge is summarized, important gaps are indicated and research priorities are suggested. Although all savannas consist of a grass and... -
Effect of nutrient calcium on the cell wall composition and digestibility of kikuyu grass (Pennisetum clandestinum Hochst)
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.P. Marais --- , Republic of South Africa D.L. Figenschou --- , Republic of South Africa Maria de Figueiredo --- , Republic of South AfricaThe effect of calcium in the nutrient medium on kikuyu grass (Pennisetum clandestinum Hochst), grown in a solution culture, was investigated. Calcium had no effect on the lignin content of leaf material, but decreased the lignin content per unit stem... -
Effects of rainfall, competition and grazing on flowering of Osteospermum sinuatum (Asteraceae) in arid Karoo rangeland
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: S.J. Milton --- FitzPatrick Institute, Republic of South AfricaThe shrub Osteospermum sinuatum, an important fodder plant in Karoo rangelands, flowered after heavy rain in autumn, winter and spring. The number of flowers produced per bush was positively conelated with basal stem diameter and rainfall in the 12 weeks... -
Land application of sewage sludge: Phosphorus considerations
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.J. McLaughlin --- ,Phosphorus considerations are gaining increasing attention where sewage sludges are applied to land because of the continuing trend of rising P levels in sludges and the growing concern for environmental pollution and nutrient recycling issues. P in sludges has reached... -
Response of five soybean (Glycine max (L.) Merr.) cultivars to lime and phosphorus on an acid Normandien subsoil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.D. Noble --- Department of Crop Science, J.D. Lea --- Department of Crop Science, M.V. Fey --- Department of Soil Science and Agrometeorology,Five soybean cultivars (Hill, Geduld, Forrest, Welkom and Oribi), previously selected for Al tolerance or sensitivity by a rapid seedling evaluation method, were grown in acid soil treated with varying rates of lime and P. After 35 days the plants... -
Pedogeomorphic aspects of the Roodepoort area, Transvaal: Soil depth-slope relationships
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Munnik --- Department of Geography, E. Verster --- Department of Geography, T.C. van Rooyen --- Department of Geography,Fifty hillslope profiles with associated soils in the Roodepoort area, Transvaal, were examined to determine the relationships between soil depth and hillslope characteristics. A meso-scale approach was adopted which implied the relationship between three soil depth phases and the hillslope... -
Factors affecting the activity of atrazine in plants and soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.C. Nel --- Department of Plant Production, C.F. Reinhardt --- Department of Plant Production,Available research findings concerning (he activity of atrazine in the plant and soil are presented in a brief review. The role of the environment is emphasized. This review is supplemented by recent research results of the University of Pretoria concerning... -
Fisiologiese blaarabnormaliteite en bolopbrengs by katoen (Gossypium hirsutum L.) soos deur kalium-, kalsium- en boorvoeding beïnvloed
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. J.J. Combrink --- Navorsingsinstituut vir Tabak en Katoen,Physiological leaf abnormalities and boll yield of cotton (Gossypium hirsutum L.) as affected by potassium, calcium and boron nutrition. A pot trial with a sand medium and two levels each of K, Ca and B nutrition, factorially arranged, was carried... -
Die invloed van swartpunt by gars (Hordeum distichon) op ontkieming en α-amilase-aktiwiteit
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. C.J. Maree --- Departement Akkerbou en Weiding, A. L.P. Caims --- Departement Akkerbou en Weiding,Gesonde garssaad en swartpuntgarssaad vanaf verskillende lokaliteite is vergelyk. Die ontkiemingsenergie van gesonde saad was na een maand beduidend beter as die van swartpuntsaad. Na 'n opbergingperiode van twee tot drie maande het geen verskille in ontkiemingsenergie en -kapasiteit meer... -
The origin of textural lamellae in Quaternary coast sands of Natal
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.P. van Reeuwijk --- , The Netherlands J.M. de Villiers --- Department of Soil Science and Agrameteorotogy,A new concept of the formation of textural subsoil lamellae has been developed on the basis of their morphology in aeolian coastal deposits in Natal. It has been concluded that they are initiated somewhere at depth in the profile by... -
Intercropping of beans (Phaseolus vulgaris L.) and sugar-cane: The effect of inter-specific competition on the growth of plant cane
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. F.A. Leclezio --- Department of Crop Science, J.D. Lea --- Department of Crop Science, P.K. Moberly --- ,The competitive effects of intercropped beans (maturation period: three months) on the growth, tiller development and yield of plant sugar-cane (maturation period: 18 months) in the subhumid coast-hinterland of Natal were investigated over two seasons. In the first season rainfall... -
Evaluering van plantdoders vir langtermynbeheer van onkruid in aanplantings van knoffel (Allium sativum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.F. Nortjé --- , P.J. Henrico --- ,Van die ses plantdoders wat geëvalueer is, het slegs oksifluorfen bevredigende siesoenlange beheer van onkruide in aanplantings van knoffel (Allium sativum L.) verskaf. Oksadiason, chloroksuron, nitrofen, metabenstiasuron, ioksinil en oksifluorfen het min of geen fitotoksiese simptome op knoffel teen aanbevole... -
Effect of simulated acid rain and sulphur nutrition on the growth, sulphate and cation content of Bromus diandrus Roth.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.M. Phillips --- Department of Botany, L.M. Raitt --- Department of Botany, J. Aalbers --- Department of Botany,Bromus diandrus seedlings were grown in sand culture under greenhouse conditions, using a two factor randomized block design. Two levels of sulphur nutrition (with and without) and three acid rain treatments were applied. The plants were harvested 45 days after... -
Tolerance of South African maize (Zea mays L.) cultivars to atrazine
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.R. Le Court De Billot --- Summer Grain Centre, P.C. Nel --- Department of Plant Production,Sixty-seven maize cultivars were evaluated for tolerance to atrazine (4 p.p.m. v/v) in nutrient solution. Shoot dry masses (SDM) of only two cultivars, SAB149 and NPP x K64r, were reduced more than 40% and another 14 were reduced by more... -
Genotypic tolerance of selected dry bean (Phaseolus vulgaris L.) cultivar s to soluble Al and to acid, low P soil conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.D. Noble --- Department of Crop Science, J.D. Lea --- Department of Crop Science, M.V. Fey --- Department of Soil Science and Agrometeorology,Twelve dry bean cultivare were grown for seven days on filter paper soaked with nutrient solution containing a range of up to 10 mmol Al dm−3. Differential response to Al toxicity, measured as taproot elongation, occurred at Al concentrations of... -
Voorspelling van die aanpassingsvermoë van koringkultivars gebaseer op daglengte- en vernalisasiereaksie
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.D. Joubert --- ,Die koue- en daglengtereaksies van koringkultivars in groeikaste is ondersoek as aanduiding van die produksiegebiede waar die betrokke kultivars sal aanpas. Die resultate toon dat die 24 koringkultivars wat ondersoek is, uiteenlopende koue- en daglengtereaksies vertoon. Klassifikasie van die kultivars... -
Die invloed van fosfor, nitraat en ammonium op die opname en vervoer van stikstof en fosfor en op die groei van koring
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.S. Claassens --- Departement Grondkunde en Plantvoeding, W.J. Fölscher --- Departement Grondkunde en Plantvoeding,In 'n waterkultuureksperiment met koring is die invloed van verskillende P-toedienings (0,02 tot 5,0 me H2PO4 dm−3) en van verskillende NH4:NO3-verhoudings (0:15 tot 12:3) met 'n Hoagland-voedingsoplossing (no. 2) as kontrole bestudeer. Normale groei is reeds by 'n laer P-voorsiening... -
Recovery of grain sorghum [Sorghum bicolor (L.) Moench] from atrazine and cyanazine phytotoxicity
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.R. le Court de Billot --- , P.C. Nel --- Department of Plant Production,Recovery of growth following atrazine and cyanazine toxicity and the effect on subsequent grain yield of sorghum were studied in nutrient solutions in two separate experiments. In Experiment I, concentrations of atrazine and cyanazine were decreased at weekly intervals based... -
Effect of planting date on the phenology, seed yield, and fatty acid composition of three sunflower (Helianthus annuus L.) cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.N. de Vos --- , J. Dreyer --- , J.D. Lea --- Department of Crop Science,Four planting dates (early October to mid-January) were used to obtain a range of environmental conditions for growing three sunflower cultivars. The effect of planting date on phenological development was small compared to that of genotype though the hybrid S0404... -
Invloed van bemesting op die oliekonsentrasie oliekwaliteit van sonneblomsaad
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.L. Loubser --- Olie- en Proteïensadesentrum, Departement Landbou en Watervoorsiening, C.L. Grimbeek --- Olie- en Proteïensadesentrum, Departement Landbou en Watervoorsiening,Influence of fertilization on the oil concentration and oil quality of sunflower seed. Fertilizer trials (N,P,K and lime) were conducted over two seasons at three localities. Results indicate that 150 kg N ha−1 fertilizer decreased the oil concentration of the... -
Evaluation of the effects of scorching caused by the directed application of a paraquat-containing herbicide mixture to the base of maize plants at various ages
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. E.L. Thomas --- ,The effect of herbicides which scorched the lower leaves of maize was compared in three seasons. The first season was relatively dry whilst the other two were wetter seasons. A mixture of cyanazine + atrazine + paraquat + a wetting... -
Effect of Ca, K and B supply on water-stress induced chlorophyll loss from tobacco and cotton leaf discs
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: ElizabethA. Davies --- , England N. J.J. Combrink --- , Republic of South AfricaA study was made of the influence of Ca:K ratios and B levels on the chlorophyll content of tobacco and cotton leaves grown under glasshouse conditions. Excised leaf discs were floated on a solution of polyethylene glycol 6000 to study... -
The influence of photoperiod and temperature on the pre-flowering phase length of eleven soybean cultivars in northern Natal
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Chapman --- Agricultural Research Station,The effect of photoperiod and temperature on the pre-flowering phase length of 11 soybean cultivars was studied. Heat units (10 to 30°C) and night hours (sunset to sunrise) were used as measures of temperature and photoperiod respectively. Highly significant negative... -
The persistence in soil and phytotoxicity on dry beans of alachlor and metolachlor as affected by climatic factors
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E. van Rensburg --- , L.P. van Dyk --- ,The persistence of alachlor (2-chloro-2′, 6′-diethyl-N-methoxymethylacetanilide) and metolachlor [2-chloro-6′-ethyl-N-(2-methoxy-1-methylethyl)acet-O-toluidide] in soil was determined over an 80-day period at temperatures ranging from 5 to 50°C. Soils were maintained at either 50 or 100% of field capacity. The herbicides were less persistent... -
Rol van tekorte aan sekere makro-elemente by verdraagsaamheid van mielies (Zea mays L.) teenoor atrasien
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Departement Plantproduksie, P.C. Nel --- Departement Plantproduksie, N. M.J. Vermeulen --- Departement Biochemie, Z. Apostolides --- Departement Biochemie, D. J.J. Potgieter --- Departement Biochemie,Die verdraagsaamheid van mieliesaailinge (Zea mays L. kv SSM2041) teenoor atrasien is in 'n glashuis ondersoek. Plante is in potte gekweek, in voedingsoplossings met tekorte aan sekere makro-elemente. Atrasien in die voedingsoplossings is periodiek bepaal met behulp van hoëdrukvloeistofchromatografie. Tekorte... -
Alachlor-geïhduseerde veranderinge in sekere membrane van Sorghum bicolor (L.) Moench-plante
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Departement Plantproduksie, Republiek van Suid-Afrika P.C. Nel --- Departement Plantproduksie, Republiek van Suid-AfrikaSekere ultrastrukturele veranderinge veroorsaak deur alachlor (α-chloor-2′, 6′-diëtiel-N-metoksimetielasetanilied) in graansorghumplante is ondersoek. Elektronmikro- skoopmikrograwe het aangetoon dat disintegrering van vakuoolmembrane, kernmembrane en omhullingsmembrane van chloroplaste voorgekom het by alachlorbehandelde plante. -
Atrazine metabolism in field-grown maize and the effect of atrazine phototoxicity on yield
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Malan --- , Republic of South Africa J.H. Visser --- Department of Botany, Republic of South Africa H.A. van de Venter --- Department of Botany, Republic of South AfricaMaize was grown under field conditions, applying conventional farming practices. Atrazine was sprayed pre- emergence at concentrations of 1,25 I ha−1ai. and 5 I ha−1ai. Severe phytotoxicity symptoms were visible from the first- to about the sixth-leaf stage i.e. 25–30... -
Die swawelstatus van besproeiingsgronde onder veranderende bemestingspraktyke
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. van Schalkwyk --- Departement van Landbou en Watèrvoorsiening, Republiek van Suid-Afrika R. du T. Burger --- , Republiek van Suid-AfrikaDie effek van die gebruik van swawelvrye teenoor swawelbevattende bemestingstowwe op die swawelstatus van 'n Mangano-grond van Vaalharts, is met behulp van 'n potproef ondersoek. Waar swawelvrye bemestingstowwe gebruik is was gebreksimptome na die derde snysel reeds duidelik sigbaar by... -
Reproduktiewe opbrengskomponente van mielies (Zea mays L.) soos beïnvloed deur verskillende grondvrugbaarheids- en be- sproeiingspeile
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.E. Steynberg --- Departement Plantproduksie, Republiek van Suid-Afrika P.C. Nel --- Departement Plantproduksie, Republiek van Suid-Afrika P.S. Hammes --- Departement Plantproduksie, Republiek van Suid-AfrikaDie reproduktiewe opbrengskomponente van mielies (Zea mays L.) is gedurende die 1982/83-seisoen gemonitor by sekere behandelings van 'n langtermyn bemestings- en besproeiingsproef met twee peile elk van besproeiing (W), stikstof (N), fosfor (P), kallum (K) en kompos (M). Addisionele besproeiing... -
Response of subterranean clover to liming and phosphate fertilization on a low potassium soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South Africa R.E. Harris --- , Republic of South AfricaSeveral Trifolium varieties grown in an acid Bokkeveld shale soil responded positively to small additions of lime and P. Growth was probably limited by a K deficiency, and it is unlikely that Trifolium species could be successfully grown as cover... -
Changes in a Doveton clay loam after 12 years of direct-drill maize production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.B. Mallett --- , Republic of South Africa P.M. Lang --- , Republic of South Africa A.J. Arathoon --- , Republic of South AfricaAfter 8 years of direct-drill maize production at Cedara on a Hutton/Doveton clay loam (Typic Plinthustult) it was found that the top 120-mm layer had become somewhat denser and that organic carbon levels in the top 20 mm were higher... -
Die invloed van grond-pH op die ekstraheerbare fosfor, kalium, kalsium en magnesium met bikarbonaat as ekstraheermiddel
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.J. Vorster --- , Republiek van Suid-Afrika P.J. Snyman --- , Republiek van Suid-AfrikaMet behulp van grond-pH is Olsen se natriumbikarbonaat- ekstraheerbare fosfor en ammoniumasetaat-ekstraheerbare kalium, kalsium en magnesium met die gewysigde ISFEI- (NH4HCO3 - Na-EDTA - NH4F) ekstraksiemetode vergelyk. Op grond van pH (CaCl2) is die grondmonsters wat in die ondersoek gebruik... -
South African Journal of Plant and Soil Instructions to Authors
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.S. Hammes --- Department of Plant Production, Republic of South Africa B. Kriel --- Department of Plant Production, Republic of South Africa E.A. Beyers --- Department of Plant Production, Republic of South AfricaSingle maize plants (Zea mays L cv. SNK 2244) were grown in sand culture in polyethylene tubes (300 mm × 110 mm diam.) in a glasshouse. Apparent photosynthetic rate was determined at intervals during the growing period, using a portable... -
The optimization of nitrogen and phosphorus application to cultivated Digitaria eriantha ssp. eriantha pasture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. van Rooyen --- Directorate of Biometric and Datametric Services, Department of Agriculture and Water Affairs, Republic of South Africa C.S. Dannhauser --- Highveld Region, Department of Agriculture and Water Affairs, Republic of South AfricaA production function is derived and calibrated for Digitaria eriantha hay production in the Highveld region of the RSA. A procedure is described that optimizes this function for nitrogen and phosphorus application rates within economic and risk constraints at different... -
'n Evaluasie van twee chromatografiese metodes vir die roetine-bepaling van nikotien en nornikotien in tabak
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.G. Nel --- , Republiek van Suid-AfrikaTen einde 'n geskikte metode op 'n tyd- en kostebasis te vind vir die roetine-ontleding van nornikotien in tabakmonsters, is twee tegnieke van individuele alkaloïedbepalings vergelyk. Met die dunlaagchromatografiese metode kon sewe verskillende alkaloïedes in een van die monsters wat... -
Influence of abscisic acid on polyphenol oxidase browning potential in avocado
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P. Bower --- , Republic of South Africa J. G.M. Cutting --- , Republic of South AfricaVarious levels of abscisic acid (ABA) were infused into unripened ‘Fuerte’ avocado fruit. After ripening, polyphenol oxidase (PPO) activity was measured, and abscisic acid (ABA) levels monitored. The study showed that an increase in applied ABA increased PPO levels, particularly... -
The Fieldes and Perrott field test as an aid to identification for podzol B horizons
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. Clough --- , Republic of South Africa T.W. Payn --- , Republic of South AfricaThe Fieldes and Perrott test for allophane was assessed as an aid to identifying podzol horizons. The test was compared to the chemical criteria for podzol B horizons on 51 B horizon samples collected in the southern Cape. In 37... -
Invloed van bemesting op sonneblomme. I. Saadopbrengs
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.L. Loubser --- , Republiek van Suid-Afrika C.L. Grimbeek --- , Republiek van Suid-Afrika Beulah Bronkhorst --- , Republiek van Suid-AfrikaBemestingsproewe is by drie lokaliteite oor vier seisoene uitgevoer deur 'n ongerepliseerde 43-gestrengelde faktoriaaluitleg te gebruik. Peile het gewissel van 0 tot 150 kg N ha−1, 0 tot 45 kg P ha−1, 0 tot 60 kg K ha−1 by twee... -
The influence of different P, NH+ 4 and NO− 3 supply levels on the yield and P and Ca relationships in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.S. Claassens --- Department Soil Science and Plant Nutrition, Republic of South Africa W.J. Fölscher --- Department Soil Science and Plant Nutrition, Republic of South AfricaIn a water culture experiment with wheat, the influence on growth and nutrient uptake of varying the P supply from 0,02 to 5 mmol H2PO4 − dm−3 and the NH4 +:NO3 − ratio from 0:15 to 12:3, with a Hoagland... -
Role of temperature in the activity of acetanilide herbicides on three Phaseolus taxa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E. van Rensburgd --- , Republic of South Africa L.P. van Dyk --- , Republic of South Africa G.H. de Swardt --- , Republic of South AfricaAlachlor [2-chloro-N-(2,6 diethylphenyl)-N-(methoxymethyl) acetamide], metolachlor [2-chloro-N-(2-ethyl-6- methylphenyl)-N-(2-methoxy-1 -methylethyl) acetamide] and acetochlor [2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6- methyl-phenyl) acetamide], members of the chloroacetanilide herbicides, are used pre-emergence to control grasses and some broadleaf weeds. Two concentrations, i.e. 0,5 and 2 mg ai kg−1 of the... -
A comparison beween short-term chemical and biological methods to measure phosphorus availability in sludge-amended sesquioxic soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.J. McLaughlin --- , Republic of South AfricaDue to the transformations which sludge undergoes after addition to soil, single measurements of P availability are of little value in soils which have recently received additions of sewage sludge. This study assessed six procedures on two soils—a clay of... -
Spatial pattern and variability of soils in a granite landscape, north-east of Nelspruit
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E. Verster --- Department of Geography, Republic of South AfricaMorphological and selected chemical and granulometric properties of eleven soil profiles occurring on five hillslope sites (midslope, upper footslope, mid-footslope, lower footslope and valley bottom) were determined in order to evaluate the spatial pattern and variability of soils in a... -
The effects of 2,4-D iso-octyl ester/ioxynil herbicide in the liquid and vapour phases on the growth of tomato (Lycopersicon esculentum Mill.) plants
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.J. Bennet --- Department of Agriculture and Water Supply, Republic of South AfricaControlled-environment studies confirmed that tomato plants subjected to a range of treatments involving the herbicide 2,4-D iso-octyl ester/ioxynil applied in the vapour and liquid phases develop symptoms of phytotoxicity in proportion to the severity of the treatment. Plants which received... -
Geographical distribution of monthly mean daily global solar radiation over South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. C.M. Reid --- , Republic of South Africa J.M. de Jager --- Department of Agricultural Meteorology, Faculty of Agriculture, Republic of South AfricaSolar radiation is the driving force which most directly influences the surface water balance and crop yields. In South Africa this variable is measured at a limited number of sites. In order to determine the geographic distribution of monthly mean... -
Rapid simultaneous rating of soil texture, organic matter, total nitrogen and nitrogen mineralization potential by near infra-red reflectance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.H. Meyer --- , Republic of South AfricaA rapid non-destructive technique for the determination of various soil properties by near infra-red spectrophotometry is described. Over 100 soils, of which the organic matter content, total nitrogen (N) content, N-mineralizing potential and particle size distribution were known, were used... -
Barley cultivar identification by acid Polyacrylamide gel electrophoresis of hordein proteins
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O.T. de Villiers --- Department of Agronomy and Pastures, Republic of South Africa E.W. Laubscher --- Department of Agronomy and Pastures, Republic of South AfricaMethods are described for the extraction and separation of hordein proteins of barley by acid Polyacrylamide gel electrophoresis as a means of identifying different cultivars. Experimental conditions for the extraction of the proteins from single kernels and from corresponding flour... -
Drought sensitivity of maize (Zea mays L.) in relation to soil fertility and water stress during different growth stages
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.E. Steynberg --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South Africa P.S. Hammes --- Department of Plant Production, Republic of South AfricaMaize was grown under controlled conditions in a pot experiment to determine how drought sensitivity would be affected by differential soil fertilities. Soil was obtained from a fertilization field trial where soil fertility differences developed over a period of 45... -
Effect of soil nutritional status and irrigation on plant available water of wheat (Triticum aestivum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.G. Annandale --- Department of Plant Production, Republic of South Africa A.A. Nel --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South AfricaPlant available water (PAW) is the amount of water in the soil profile available for crop use. When irrigation management is based on a percentage depletion of PAW accurate estimates of PAW are essential and it is important that factors... -
Phytotoxicity of pre-emergence herbicides to peach seedlings (Prunus persica)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.F. Lourens --- , Republic of South Africa A.H. Lange --- Extension Weed Scientist, United States of America F.J. Calitz --- , Republic of South AfricaPre-emergence herbicides were tested for relative phytotoxicity to Nemaguard peach seedlings (Prunus persica) in a sand culture. Typical symptoms, phytotoxicity ratings, growth and regrowth parameters were recorded. Diuron, the mixture diuron plus terbacil (1:1), terbutryne and norflurazon were rated phytotoxic... -
Abnormalities of the growth point and ear of barley caused by 2,4-dichlorophenoxy acetic acid
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.W. Loubser --- Department of Agriculture and Water Supply, Republic of South Africa A. L.P. Cairns --- , Republic of South AfricaTreatment of barley plants with 2,4-D, when the main tiller apical meristem was in the late vegetative or double ridge stage, resulted in the production of various abnormalities including missing spikes, branched spikes, whorls of spikelets and paired spikelets instead... -
Growth and nutrient content of soybeans in relation to solution calcium and aluminium
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.D. Noble --- Department of Crop Science, Republic of South Africa M.E. Sumner --- Department of Agronomy, United States of AmericaAluminium (Al) is a major component of most soils and is a limiting factor to sustained crop production in many regions. The amelioration of Al toxicity is of theoretical as well as practical interest in our understanding of mechanisms of... -
Importance of selected soil properties on the bioactivity of alachlor and metolachlor
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South AfricaBioassays with grain sorghum (Sorghum bicolor L. Moench) cultivar NK222 were conducted in a glasshouse. Thirty-four natural soils were used in each of two experiments with alachlor [2-chloro-2′,6′-diethyl-N- (methoxymethyl) acetanilide] and metolachlor [2-chloro-6′-ethyl-N-(2-methoxy-1-methylethyl)acet-otoluidide] respectively. Linear regression analyses were performed to... -
Aluminium and pH effects on dry bean root growth in nutrient solution
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.D. Noble --- Department of Agronomy, Republic of South Africa T. Harding --- Department of Agronomy, Republic of South AfricaDespite considerable interest in the phytotoxic nature of soluble aluminium (Al), the relationships between Al species and observed phytotoxicity are not fully understood. A solution culture technique was employed to study the effects of Al species, at varying pH levels,... -
The association between residual chlorophyll and grassy taste in black tea
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.J. van Lelyveld --- , Republic of South Africa B.L. Smith --- , Republic of South AfricaThe ‘grassy’ taste in some South African and Central African black teas is not up to tea tasters' and buyers' standards. It has been shown by a number of researchers that this taste is associated with volatiles in the tea... -
The volatilization of formulated ester, amine and K salt derivatives of phenoxyalkanoic herbicides: Evidence to connect herbicide activity with plant nutrient status of tomato (Lycopersicon esculentum Mill) plants
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.J. Bennet --- Department of Agriculture and Water Supply, Republic of South AfricaControlled environment studies were conducted involving different vapour treatments applied to tomato plants using the herbicides 2,4-D iso-octyl ester/ioxynil, 2,4-D dimethyl amine salt and MCPA K salt. These indicated that the amine salt and MCPA were much less volatile than... -
Importance of selected soil properties on the bioactivity of acetochlor and metazachlor
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South AfricaThe bioactivity of acetochlor (2-chloro-N-(ethoxymethyl)-6′-ethyl-o-acetotoluidide) and metazachlor (2- chloro-N-(1-pyrazolylmethyl)-aceto-2′,6′-xylidide) was evaluated in thirty-two soils under controlled conditions. Grain sorghum (Sorghum bicolor L. Moench) cultivar NK222 was used as the indicator plant in the bioassays. Bioactivity was correlated with organic matter... -
Role of temperature and water potential on the activity of some acetanilide herbicides on three Phaseolus taxa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E. van Rensburg --- , Republic of South Africa L.P. van Dyk --- , Republic of South Africa G.H. de Swardt --- , Republic of South AfricaThe effect of three acetanilide herbicides on the hypocotyl-epicotyl growth rate of three Phaseolus taxa was studied at two temperatures and two water potentials. The study proved that, apart from the detrimental effects of the herbicides, low temperature and water... -
Spatial pattern and variability of soil and hillslope properties in a granitic landscape 1. Pretoriuskop area
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Munnik --- Department of Geography, Republic of South Africa E. Verster --- Department of Geography, Republic of South Africa T.H. van Rooyen --- Department of Geography, Republic of South AfricaCharacteristics of nine hillslope profiles and selected properties of 69 soil profiles were determined in order to evaluate the spatial pattern and variability of soil and hillslope properties in a granitic area near Pretoriuskop, Kruger National Park. A transect design... -
The effect of leaf water potential on the carbon-dioxide uptake rate during different growth stages of wheat (Triticum aestivum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Human --- Department of Agronomy, Faculty of Agriculture, Republic of South Africa W.J. Roux --- Department of Agronomy, Faculty of Agriculture, Republic of South Africa L.P. de Bruyn --- Department of Agronomy, Faculty of Agriculture, Republic of South AfricaThe effect of water stress on the CO2 uptake rate was measured at three different growth stages of wheat grown in Mitscherlich pots in a glasshouse experiment. Stress was induced by withholding water until the leaf water potential reached −2... -
Invloed van bemesting op sonneblomme. II. N-, P- en K-verwydering deur die gewas
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.L. Loubser --- , Republiek van Suid-Afrika C.L. Grimbeek --- , Republiek van Suid-Afrika Beulah Bronkhorst --- , Republiek van Suid-AfrikaN-, P- en K-ontledings is gedoen op saad- en plantmonsters wat verkry is uit twee NPK bemestingsproewe en een N × P × kalkproef. Die resultate is gebruik om die N-, P- en K-verwydering deur verskillende plantdele te bereken. Daar... -
The effect of acetanilide herbicides on photosynthesis and respiration in isolated hypocotyl-epicotyl cells from three Phaseolus taxa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E. van Rensburg --- , Republic of South Africa L.P. van Dyk --- , Republic of South Africa G.H. de Swardt --- , Republic of South AfricaThe effect of alachlor [2-chloro-N-(2,6 diethylphenyl)-N-methoxymethyl) acetamide], metolachlor [2-chloro-N- (2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl) acetamide] and acetochlor [2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl) acetamide] on photosynthesis and respiration of isolated 10-day-old hypocotyl-epicotyl cells from three Phaseolus taxa was investigated. Herbicide concentrations of 1×10−12, 1×10−10, 1×10−8, 1×10−6,1×10−4 and 5×10−3 M... -
Nitrogen fertilization of tea: Effect of tea leaf plucking criteria on chlorophyll and quality parameters
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.J. van Lelyveld --- , Republic of South Africa Connie Fraser --- , Republic of South Africa B.L. Smith --- , Republic of South Africa G. Visser --- , Republic of South AfricaThe purpose of this investigation was to establish the possible effect of plucking criteria on the quality of black tea produced with different levels of nitrogen fertilization. Increases in leaf age (norms) resulted in increased total chlorophyll in fresh green... -
Quantities of phosphorus fertilizer required to raise the soil test value
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.A. Johnston --- Department of Agronomy, Republic of South Africa N. Miles --- , Republic of South Africa G.R. Thibaud --- Summer Grain Sub-Centre, Republic of South AfricaTo calculate nutrient requirement it is necessary to know how much of that nutrient must be applied to overcome any buffering effects and raise the test value to a desired level. A glasshouse study was conducted on a wide range... -
Die verwantskap tussen maksimum nitrifikasietempo en relevante eienskappe van gronde vanaf die sentrale besproeiingsgebiede in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Laubscher --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie oogmerk van die studie was om die verwantskappe tussen maksimum nitrifikasietempo (Kmaks) en relevante eienskappe van die gronde vanaf die sentrale besproeiingsgebiede uit te wys. Die verloop van nitrifikasie is in agt gronde, afkomstig van die gebiede, gemonitor na... -
Concentration, accumulation and uptake rate of macro-nutrients by winter wheat under irrigation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.C. du Preez --- Department of Soil Science, Republic of South Africa A. T.P. Bennie --- Department of Soil Science, Republic of South AfricaThe objective of this study was to obtain information on the nutrient uptake patterns of winter wheat (Triticum aestivum L.) grown under normal irrigation farming conditions. Except for irrigation scheduling, 13 farmers were allowed to follow their normal farming practices... -
Refinement and validation of the PUTU wheat crop growth model 1. Phenology
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Singels --- Department of Agrometeorology, Republic of South Africa J.M. de Jager --- Department of Agrometeorology, Republic of South AfricaThe phonological submodel of the PUTU wheat crop growth model was refined to account for the variation in sensitivity to vernalization and photoperiod. Crop development rate was simulated in five phenological phases making use of temperature and photoperiod. Base values... -
Lime-phosphorus interactions in the growth of temperate pasture species on highly-weathered soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. Miles --- Department of Agricultural Development, Republic of South Africa R.J. Eckard --- Department of Agricultural Development, Republic of South AfricaLime and phosphorus (P) requirements for the growth of temperate pasture species on acid, well-drained soils in the Natal Midlands were evaluated in factorial field trials. Species studied were white clover (Trifolium repens), tall fescue (Festuca arundinacea) and Italian ryegrass... -
Inhibering van urease-aktiwiteite in sekere gronde van die sentrale besproeiingsgebiede in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F. P.J. Thormählen --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. den Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie verloop van hidrolise is in vier gronde met verskillende urease-aktiwiteite, afkomstig van die sentrale besproeiingsgebiede, gemonitor na toediening van ureum teen die ekwivalent van 100 kg N ha−1. Gelyktydig met die toediening van ureum is sewe belowende inhibeerders ook... -
Influence of crop production practices on Pythium infections and yield of winter wheat in fumigated and non-fumigated soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.B. Scott --- Small Grain Centre, Republic of South Africa W.H. Kilian --- Small Grain Centre, Republic of South Africa W.S. Miles --- Small Grain Centre, Republic of South AfricaField trials consisting of different tillage and soil fertility treatments were conducted to study possible causes of yield decline of monoculture winter wheat in the eastern Orange Free State. Soil fumigation with methyl bromide enhanced plant growth, reduced Pythium infections... -
The effectiveness of Langebaan rock phosphate and superphosphate in two acid, phosphate-deficient soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.R. Thibaud --- Summer Grain Sub-Centre, Republic of South Africa M. P.W. Farina --- Summer Grain Sub-Centre, Republic of South Africa J.C. Hughes --- Summer Grain Sub-Centre, Republic of South Africa M.A. Johnston --- Summer Grain Sub-Centre, Republic of South AfricaAcid, P-deficient soils with a large capacity to immobilize P favour the rapid decomposition of apatite. Such soils are widespread in the east of South Africa and the possibility exists that Langebaan rock phosphate (Langfos) may be a more cost-effective... -
Effects of 2,4-D iso-octyl ester on the morphology, chlorophyll content and dry mass of lettuce and tomato seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.R. Meinhardt --- Department of Agricultural Development, Republic of South Africa L.P. van Dyk --- Department of Agricultural Development, Republic of South AfricaTomato and lettuce seedlings were exposed to 1 or 3 mm of simulated rainfall containing the auxin-type herbicide 2,4-D iso-octyl ester. They were then evaluated weekly for damage according to symptoms and chlorophyll content. In addition, dry matter production was... -
Spatial pattern and variability of soil and hillslope properties in a granitic landscape 2. Pretoria—Johannesburg area
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Munnik --- Department of Geography, Republic of South Africa E. Versterand --- Department of Geography, Republic of South Africa T.H. van Rooyen --- Department of Geography, Republic of South AfricaUsing a transect design, a detailed examination was made of nine hillslopes and 64 soil profiles in the granitic area between Johannesburg and Pretoria to assess the spatial pattern and variability of soil and hillslope properties. The land surface was... -
A slope sequence of Podzols in the southern Cape, South Africa 1. Physical and micromorphological properties
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.C. Hawker --- Department of Geography, South Africa T.H. van Rooyen --- Department of Geography, South Africa R.W. Fitzpatrick --- Department of Geography, South AfricaIn South Africa the characteristics of Podzols, with or without placic horizons, and the complex processes involved in their formation, are generally still poorly understood. To investigate both these aspects thoroughly, these soils were studied in the landscape context, described... -
Die invloed van verskillende waterregimes op Up-to-date aartappels I. Vegetatiewe ontwikkeling, fotosintesetempo en stomatadiffusieweerstand
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.M. Steyn --- , Republiek van Suid-Afrika H.F. du Plessis --- , Republiek van Suid-Afrika P.F. Nortjé --- , Republiek van Suid-AfrikaDrie grondwaterregimes (20, 50 en 70% onttrekking van plantbeskikbare water) is gedurende herfsaanplan- tings in 1987 en 1988 op Up-to-date aartappels toegepas om die invloed daarvan op groei en ontwikkeling te ondersoek. Twee fisiologiese parameters van plantwaterstremming, naamlik, fotosintesetempo en... -
Evaluation of pheromone trapping systems in relation to light trap captures of the maize stalk borer, Busseola fusca (Fuller) (Lepidoptera: Noctuidae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- Summer Grain Centre, Republic of South AfricaSynthetic sex pheromone formulations of the maize stalk borer, Busseola fusca (Fuller) were compared in different trap designs with a light trap for efficiency in describing seasonal moth activity. Omni-directional traps were superior to conventional delta traps for both quantitative... -
Die invloed van straling op die groei van mielies (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.M. Hurn --- Departement Plantproduksie, Republiekvan Suid-Afrika P.S. Hammes --- Departement Plantproduksie, Republiekvan Suid-AfrikaAangesien stralingsintensiteit met plek en tyd varieer, is die invloed daarvan op groei en ontwikkeling van mielies in 'n veldproef ondersoek. Drie stralingsintensiteite (100%, 75% en 42% van voile sonlig) en drie plantpopulasies (1.2, 2.7 en 5.5 plante m−2) is... -
The influence of phosphorus on the tolerance of maize (Zea mays L.) to atrazine
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South AfricaGlasshouse and field studies were conducted to examine the effect of high phosphorus (P) application on the tolerance of the maize cultivar SSM2041 to atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-tria- zine]. Two glasshouse experiments were conducted. In one, seedlings were exposed to five P... -
Leaf characters of various tea clones in relation to quality
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Robbertse --- , Republic of South Africa Elsie M.A. Steyn --- , Republic of South AfricaThe leaves of ten different tea clones were investigated to explore the possibility that structural differences exist between clones and that morphological characters relate to the quality of the infusion. Our results revealed a significant negative correlation between TF-values and... -
Drought-related protein synthesis in cotton
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. van der Mescht --- , Republic of South Africa J.A. de Ronde --- , Republic of South AfricaThe changes in protein profiles of six cotton cultivars subjected to osmotic stress were examined. Osmotic stress was applied by incubating leaf segments in mannitol. The efficiency of protein synthesis decreased with increasing concentrations of mannitol. Drought-related protein synthesis during... -
Heat-shock protein synthesis in cotton is cultivar dependent
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.A. de Ronde --- , Republic of South Africa A. van der Mescht W.A. Cress --- Department of Botany, Republic of South AfricaThe synthesis of heat-related proteins in six cotton cultivars was examined. The protein profiles of heat-stressed plants were highly cultivar specific. Heat-related proteins did not result from protein degradation. Recovery to normal protein synthesis occurred within an hour after the... -
Wheat cultivar identification by electrophoretic analysis of gliadin proteins
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O.T. de Villiers --- Department of Botany, Republic of South Africa M. Bosman --- Centre for Cereal Research, Department of Agronomy and Pastures, Republic of South AfricaPolyacrylamide gel electrophoresis of gliadin proteins in an acid medium was used to identify different spring wheat cultivars. Gliadins were extracted from single kernels or corresponding flour samples using different solvents. Gliadin electrophoretogram formulae using relative band mobilities and staining... -
Maize response to Langebaan rock phosphate—superphosphate mixtures under glasshouse conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.R. Thibaud --- Summer Grain Sub-Centre, Republic of South Africa M. P.W. Farina --- Summer Grain Sub-Centre, Republic of South Africa J.C. Hughes --- Department of Agronomy, Republic of South Africa M.A. Johnston --- Department of Agronomy, Republic of South AfricaA previous investigation showed that Langebaan rock phosphate (Langfos) was not an effective substitute for superphosphate. However, in the light of reports that P availability is enhanced when phosphate rock (PR) and monocalcium phosphate are combined, an improvement in Langfos... -
Protein turnover: possible contributing factor in determining drought tolerance in Nicotiana tabacum L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. van Rensburg --- Department of Plant and Soil Sciences, Republic of South Africa G. H.J. Krüger --- Department of Plant and Soil Sciences, Republic of South AfricaDrought stress-induced changes in the water-soluble protein concentration and total number of sulphydryl (-SH) groups were monitored under controlled environmental conditions in four tobacco cultivars (Nicotiana tabacum L.) with different drought tolerances. The drought stress ranged from light (-0.52 MPa)... -
Cabbage seed germination for the assessment of adjuvant effects on 2, 4-D iso-octyl ester volatility
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.L. Schubert --- , Republic of South Africa D.J. Erasmus --- , Republic of South Africa L.P. van Dyk --- , Republic of South Africa V. Gray --- Department of Botany, Republic of South AfricaThe germination rate of cabbage seeds (Brassica oleracea cv. Hercules) exposed to the vapour of the 2,4-dichlorophenoxy iso-octyl ester (2,4-D IOE) was used in a bioassay to determine the effectiveness of commercial adjuvants in reducing the volatility of this hormonal... -
Chemical composition of carrier water influences glyphosate efficacy
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B.L. de Villiers --- Small Grain Centre, Republic of South Africa D. du Toit --- , Republic of South AfricaGlyphosate [N-(phosphonomethyl) glycine] phytotoxicity was assessed with different sources of natural water carriers to establish to what extent ions in these carriers antagonize glyphosate activity. Glyphosate phytotoxicity with the most antagonistic carrier was 72% less than with deionized water. Antagonistic... -
Identification of tall fescue grass cultivars by sodium dodecyl sulphate and acid polyacrylamide gel electrophoresis
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.E. Hierse --- , Republic of South Africa O.T. de Villiers --- Department of Botany, Republic of South Africa M. Bosman --- Department of Botany, Republic of South AfricaProtein banding patterns of seed obtained by sodium dodecyl sulphate Polyacrylamide gel electrophoresis (SDS-PAGE) or acid Polyacrylamide gel electrophoresis (A-PAGE) were used to distinguish between different tall fescue (Festuca arundinacea Shreb.) grass cultivars. An electrophoretic formula was determined for each... -
Season of application and glyphosate formulation as factors influencing the efficacy of glyphosate on phyllode-bearing Australian acacias
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Pieterse --- Department of Agronomy and Pastures, Republic of South Africa J.B. McDermott --- , Republic of South AfricaInvasive phyllode-bearing Australian acacias are more difficult to control chemically than true-leaved acacias. Indications were that season of application influenced the efficacy of herbicides when used against these plants. In this experiment two formulations of glyphosate (with low and high... -
Use of chlorophyll a fluorescence in screening for herbicide susceptibility in several Nicotiana tabacum L. cultivars and breeding lines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. van Rensburg --- Faculty of Natural Sciences, Department of Plant and Soil Sciences, Private Bag X6001, Republic of South Africa G. H.J. Krüger --- Faculty of Natural Sciences, Department of Plant and Soil Sciences, Private Bag X6001, Republic of South Africa C.R. Nolte --- , Republic of South AfricaPossible differential sensitivity of newly released tobacco cultivars to different herbicides must be determined, as possible unfavourable combinations could exist which may have large financial implications in terms of cultivars bred, herbicide and tobacco line combinations used, and concentrations in... -
Evaluering en kalibrering van CERES-Maize 2. Groeistadia voorspellings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.S. du Toit --- , Republiek van Suid-Afrka J. Booysen --- Departement Plantkunde, Republiek van Suid-Afrika J.J. Human --- Departement Agronomie, Republiek van Suid-AfrikaMidsomerdroogte tydens blom het 'n vernietigende effek op mielie-opbrengs. Deur die plantdatum te manipuleer kan die effek van midsomerdroogte op oesopbrengs verminder word. Gewasgroeisimulasiemodelle kan gebruik word om die optimum plantdatum per cultivar te bepaal. CERES-Maize se fenologiese voorspellingswaarde is... -
Die gebruik van groeireguleerders om die blomperiode van katoen te wysig
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Dippenaar --- , Republic of South Africa T.J. Meyer --- , Republic of South AfricaKatoengebiede in Suid-Afrika, hoër as 950 m bo seevlak, het 'n kort groeiseisoen indien laat in November geplant word. Die bydrae van groeireguleerders en verbouings praktyke om rypwording van laat geplante katoen te verhaas en die uitwerking daarvan op veselgehalte,... -
Gips as grond en water ameliorant
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H. J.C. Smith --- , Republiek van Suid-Afrika A.H. Loock --- , Republiek van Suid-Afrika A.J. van der Merwe --- , Republiek van Suid-AfrikaGips korn algemeen voor, beide as 'n mineraal (gemynde gips) sowel as 'n industriële neweproduk (fosforgips of nywerheidsgips) en word vryelik gebruik as 'n grond en water ameliorant. Groot hoeveelhede nywerheidsgips word jaarliks in Suid-Afrika vervaardig in gebiede waar natuurlike... -
Reaksie van twee lentekoringkultivars op stikstof- en swaelbemesting in die Swartland. I. Vegetatiewe groei, opname en konsentrasie van stikstof en swael in die vegetatiewe plant
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P. du Plessis --- , Republiek van Suid-Afrika G.A. Agenbag --- Departement Akkerbou en Weidlng, Republiek van Suid-AfrikaDie belangrikheid van die korrekte N: S verhouding het die vraag laat ontstaan of 'n wanbelans tussen N en S nie gedeeltelik 'n bydrae tot die swak benuttingsdoeltreffendheid van N by hoë N-bemestings in die Swartland kan lewer nie. 'n... -
Assessment of phosphorus availability in soils fertilized with Langebaan rock phosphate or superphosphate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.R. Thibaud --- , Republic of South Africa M. P.W. Farina --- , Republic of South Africa J.C. Hughes --- Department of Agronomy, Republic of South Africa M.A. Johnston --- Department of Agronomy, Republic of South AfricaProblems currently exist in the interpretation of soil test values for soils fertilized with rock phosphate. This study was undertaken to compare the ability of four extradants (Ambic, Bray 1, Mehlich 3 and modified Truog) to assess plant available phosphorus... -
Reaksie van twee lengtekoringkultivars op stikstof- en swaelbemesting in die Swartland. II. Opbrengs en bakkwaliteit
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P. du Plessis --- , Republiek van Suid-Afrika G.A. Agenbag --- Departement Akkerbou en Weiding, Republiek van Suid-AfrikaIn die Swartlandkoringproduksiegebied is daar oor die afgelope tien jaar 'n daling in die gemiddelde prote'ieninhoud en bakkwaliteit van koring ondervind, selfs ten spyte van verhoogde stikstofbemesting. Die belangrikheid van die korrekte N: S verhouding het die vraag laat ontstaan... -
Swawelfraksies, -verhoudings en -verwantskappe in geselekteerde onversteurde en bewerkte Suid-Afrikaanse gronde
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. du Toit --- , Republiek van Suid-Afrika C.C. du Preez --- Departement Grondkunde, Republiek van Suid-AfrikaDie negatiewe invloed van bewerking op organiese materiaal in gronde en 'n groot afname in die eksterne insette van S het die vraag laat ontstaan of die swawelstatus van Suid-Afrikaanse gronde voldoende is om volhoubare gewasproduksie te verseker. Bewerkte en... -
Physiological response of spring wheat cultivars to post-anthesis water stress intensity
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.A. Agenbag --- Department of Agronomy and Pastures, Republic of South Africa O.T. de Villiers --- Department of Botany, Republic of South AfricaWheat crops produced under dryland conditions in the winter rainfall belt of South Africa are often subjected to water stress. To study the effect of water stress on the spring wheat cultivars Nantes, Palmiet and SST 66, an experiment was... -
High availability of alachlor affects the roots and general growth of sunflower seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Allemann --- Department of Plant Production and Soil Science, Republic of South Africa C.F. Reinhardt --- Department of Plant Production and Soil Science, Republic of South AfricaThe tolerance to alachlor [α-chloro-2′,6′?diethyl-N-(metoxy- methyl) acetanilide] of three sunflower (Helianthus annuus L.) cultivars was evaluated in an aqueous medium in a glass- house. Alachlor (0.79 - 6.32 mg L−1) caused significant reductions in the root and shoot growth of... -
Phosphorus sorption in Natal soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.H. Bainbridge --- Department of Agriculture, Republic of South Africa N. Miles --- Department of Agriculture, Republic of South Africa R. Praan --- Department of Agriculture, Republic of South Africa M.A. Johnston --- Department of Agronomy, Republic of South AfricaPhosphorus (P) sorption poses a severe constraint on the ability of many soils to supply adequate amounts of P to plants. In an effort to quantify the P sorption capacities of soils in Natal, P sorption isotherms of 50 topsoils... -
Residual effect of atrazine on field-grown dry beans and sunflower
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Department of Plant Production and Soil Science, Republic of South AfricaThe applicability of fixed recropping intervals for crops that are sensitive to atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-striazine) was assessed. Atrazine carry-over was monitored 12 and 24 months after its application at six different rates to maize (Zea mays L.) grown in eight trials... -
Can molybdenum reduce pre-harvest sprouting in wheat?
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.T. Modi --- Department of Agronomy, Republic of South Africa A. L.P. Cairns --- Department of Agronomy, Republic of South AfricaThe effect of foliar application of molybdenum (Mo) on grain dormancy was examined in six wheat cultivare at four sites. Application of 100 mg L−1 Mo at flag leaf stage significantly increased grain Mo content at all sites and reduced... -
Fotosintesetempo en stomatadiffusieweerstand van aartappels soos beïnvloed deur waterstremming
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.F. du Plessis --- , Republiek van Suid-Afrika J.M. Steyn --- , Republiek van Suid-AfrikaDie invloed van waterstremming in aartappelplante op netto fotosintesetempo en stomatadiffusieweerstand is tydens 'n herfsaanplanting ondersoek. Watertoediening is op 14, 28 en 42 dae na opkom gestaak om sodoende verskillende waterstremmingsperiodes tydens die groeiseisoen toe te pas. Hierdie Studie is... -
Spatial pattern and variability of soil and hillslope properties in a granitic landscape. 3. Phalaborwa area
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Munnik --- Department of Geography, Republic of South Africa E. Verster --- Department of Geography, Republic of South Africa T.H. van Rooyen --- Department of Geography, Republic of South AfricaA pedogeomorphic study was made of the area immediately east of Phalaborwa underlain by granitic materials. Fifty-five soil profiles from nine transects were examined in detail to determine, among other things, the spatial variability of the soils and the hillslope... -
Die invloed van grondsuurheid op koringkultivars (Triticum aestivum L.) met verskillende vlakke van aluminiumverdraagsaamheid in die Oos-Vrystaat. I. Opbrengs
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O. J.H. Bosch --- , Republlekvan Suid-Afrika W.M. Otto --- , Republlekvan Suid-Afrika J.J. Human --- Departement Agronomie, Republiek van Suid-Afrika'n Veldproef is uitgevoer oor twee groeiseisoene (1993 en 1994) in die Oos-Vrystaat om te bepaal waiter opbrengsverskille daar bestaan tussen verskillende koringkultivars wat varieër in aluminium (Al) -verdraagsaamheid. Vier verskillende pH- en suurversadigingsvlakke is gebruikom nege koringkultivars se opbrengsverskille... -
Die invloed van grondsuurheid op koringkultivars (Triticum aestivum L.) met verskillende vlakke van aluminiumverdraagsaamheid in die Oos-Vrystaat. II. Wortelontwikkeling
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O. J.H. Bosch --- , Republiekvan Suid-Afrika W.M. Otto --- , Republiekvan Suid-Afrika J.J. Human --- Departement Agronomie, Republiek van Suid-Afrika'n Veldproef is uitgevoer in die Oos-Vrystaat om te bepaal of kultivars wat verskil in aluminium (Al)-verdraagsaamheid ook verskil in wortelontwikkeling by verskillende grondsuurheidsvlakke. Drie kultivars wat varleër in Al-verdraagsaamheid is by vier grondsuurheidsvlakke in 'n verdeelde-perseelontwerp getoets. Die twee... -
Extraction and electrophoretic separation of proteins from leaves of scions and rootstocks of Vitis cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E.W. le Grange --- , Republic of South Africa O.T. de Villiers --- Department of Botany, Republic of South AfricaProteins were extracted and separated by SDS-PAGE from leaves of scions and rootstocks of different Vitis cultivars. Banding patterns were used to identify the different cultivars after extraction of the proteins with a medium containing Tris-HCI (0.68 M, pH 7.8),... -
Improved criteria for classifying hydric soils in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.C. Kotze --- Department of Grassland Science, Republic of South Africa J.R. Klug --- Department of Grassland Science, Republic of South Africa J.C. Hughes --- Department of Agronomy, Republic of South Africa C.M. Breen --- , Republic of South AfricaThere is an increasing awareness of the ecological and agricultural importance of hydric (wetland) soils. Because of the scarcity of information in South Africa, this study aimed to critically examine systems currently being applied to the hydric soils of South... -
Die invloed van saaityd op koring in 'n Mediterreense klimaat I. Fenologiese ontwikkeling
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.W. Loubser --- Departement van Landbou: Wes-Kaap, Republiek van Suid-AfrikaKoringkultivars se aanpassing word grootliks bepaal deur 'n gepaste fenologie en dit word sterk deur saaityd beïnvloed. Om verskille in opbrengs beter te kan verklaar, is kennis van die groeiduurtes van die verskillende ontwikkelingsfases van koring noodsaaklik. Min inligting oor... -
Evaluation of the relative water content and the reduction of 2,3,5-triphenyltetrazoliumchloride as indicators of drought tolerance in spring wheat cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. D.R. van Heerden --- Department of Botany, Republic of South Africa O.T. de Villiers --- Department of Botany, Republic of South AfricaThe aim of this study was to evaluate the relative water content and the reduction of 2,3,5-triphenyltetrazoliumchloride, as indicators of drought stress and drought tolerance in spring wheat cultivars (Triticum aestivum L.) grown in the Western Cape. Drought stress was... -
Kwantifisering van die opname van atmosferiese en grond-N deur sojabone [Glycine max (L.) Merrill] uit 15 N-verrykte grond
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. D. P. Botha --- , Republiek of Suid-Afrika D.C. Pretorius --- , Republiek of Suid-Afrika J.F. Bienkowski --- , Republiek of Suid-Afrika R. L.J. Coetzer --- , Republiek of Suid-AfrikaDie doel met hierdie ondersoek was om die atmosferiese en grondstikstofopname deur die groeiseisoen van sojabone vas te stei, te bepaal in watter plantdele die N afkomstig van die twee bronne versamel, of dit later na die saad getranslokeer word... -
Fosfor in geselekteerde onversteurde en bewerkte Suid-Afrikaanse gronde 1. Totale, anorganiese en organiese fosfor
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.J. van Zyl --- Departement Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement Grondkunde, Republiek van Suid-AfrikaMin is bekend oor die effek van boerderypraktyke soos bewerking, bemesting en bekalking op die fosforfraksies in gronde van die somerreënvalgebied (25°-30°S; 24°–30°O) in Suid-Afrika. Die doelstellings van die studie was om die effek van gewasverbouing op die totale (Pt),... -
Identification of Cyclopia species (‘Heuningbostee’) using Polyacrylamide gel electrophoresis
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O.T. de Villiers --- Department of Botany, South Africa M. Bosman --- Department of Botany, South Africa J.H. de Lange --- , South AfricaProtein banding patterns of seed obtained by sodium dodecyl sulphate Polyacrylamide get electrophoresis (SDS-PAGE) or acid polycrylamide gel electrophoresis (A-PAGE) were used to distinguish between different Cyclopia species (‘heuningbostee’). An electrophoretic formula was determined for each species using relative band... -
Response of maize to ammonium nitrate, urea and cogranulated urea-urea phosphate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O.A. Yerokun --- Department of Soil Science, ZambiaUrea fertilizers may lose N by ammonia volatilization when applied in the field. In order to reduce this loss, modified urea compounds are being used. Not all of them reduce ammonia loss and improve crop yields. A field study was... -
Ammonia volatilization from ammonium nitrate, urea and urea phosphate fertilizers applied to alkaline soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O.A. Yerokun --- Department of Soil Science, ZambiaThe volatilization of ammonia following applications of urea fertilizers to soils may release significant amounts of N into the atmosphere and reduce the plant available N. This study compared ammonia loss from urea phosphate (170 g N kg−1, 190 g... -
Pentachlorophenol-contaminated soil bioremediation: survival and efficacy of monoculture inoculants and enrichment of indigenous catabolic populations
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. D.K. McBain --- Department of Bioscience and Biotechnology, United Kingdom M.S. Salkinoja-Salonen --- Department of Applied Chemistry and Microbiology, Finland E. Senior --- , South Africa C.A. du Plessis --- Department of Microbiology and Biochemistry, South Africa A. Paterson --- Department of Bioscience and Biotechnology, United Kingdom I.A. Watson-Craik --- Department of Bioscience and Biotechnology, United KingdomSurvival and efficacy of monoculture inoculants of Flavobaderium sp. and Rhodococcus chlorophenolicus to bioremediate PCP-contaminated soil were examined under sterile and non-sterile conditions. Both species effected ≥ 40% catabolism in four weeks although inoculant survival was significantly higher with R... -
The influence of Demeton-S-Methyl/Parathion and Imidacloprid on the yield and quality of Russian wheat aphid resistant and susceptible wheat cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: VickiL. Tolmay --- , South Africa D. van Lill --- , South Africa MarieF. Smith --- , South AfricaRussian wheat aphid, (Diuraphis noxia) causes severe damage to wheat in South Africa and producers have been forced to use insecticides for control. Plant resistance to Russian wheat aphid has been successfully transferred into bread wheat cultivars. A split plot... -
The use of acid Polyacrylamide gel electrophoresis to determine the effect of locality of growth on the protein profiles of barley, wheat and honeybush tea
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O.T. de Villiers --- Department of Botany, South Africa M. Bosman --- Centre for Cereal Research, Department of Agronomy and Pastures, South AfricaAcid Polyacrylamide gel electrophoresis (A-PAGE) of proteins was used to identify different spring wheat cultivare, barley cultivars and Cyclopia species. Experimental conditions for the extraction of the proteins from single kernels as well as corresponding flour samples are described. Different... -
Optimizing glyphosate performance with adjuvants
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B.L. de Villiers --- , South Africa R.C. Lindeque --- , South Africa H.A. Smit --- , South AfricaGlyphosate [N-(phosphonomethyl)glycine] is a non-selective herbicide which is extremely sensitive to antagonism by salts in the spray solution and to environmental conditions at application. Various adjuvants were evaluated with glyphosate in glasshouse and field experiments with the aim of identifying... -
Calibration of CERES3 (Maize) to improve silking date prediction values for South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.S. du Toit --- , Republic of South Africa J. Booysen --- , Republic of South Africa J.J. Human --- Department of Agronomy, Republic of South AfricaSilking which coincides with the mid-summer drought in South Africa, could have a significant negative effect on maize yield. Errors in the prediction of silking date could contribute to errors in kernel number simulation, and consequently to errors in yield... -
Association of a stem rust resistance gene (Sr45) and two Russian wheat aphid resistance genes (Dn5 and Dn7) with mapped structural loci in common wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.F. Marais --- Department of Genetics, Republic of South Africa W.G. Wessels --- Department of Genetics, Republic of South Africa M. Horn --- Department of Genetics, Republic of South Africa F. du Toit --- , Republic of South AfricaA stem rust resistance gene, originally derived from Triticum tauschii accession RL5289 and present in the germplasm line 87M66-2-1, is here designated Sr45. Sr45 was found to be closely linked to Sr33 (9 ± 1.9 map units) and the centromere... -
Detecting nitrogen deficiency on irrigated cash crops using remote sensing methods
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.S. Fouche --- Department of Soil Science, Republic of South AfricaEarly detection of nitrogen deficiency on annual agricultural crops can assist the management of N-fertilization to improve crop yields. Low altitude aerial photography is an inexpensive means to assess crop canopy radiation in the near infrared range. In this study,... -
Inheritance of resistance to Russian wheat aphid, Diuraphis noxia (Homoptera: Aphididae) in two wheat lines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vicki Tolmay --- , Republic of South Africa C.S. van Deventer --- , Republic of South Africa M.C. van der Westhuizen --- , Republic of South AfricaThe Russian wheat aphid, Diuraphis noxia, is a serious pest of wheat grown in the summer rainfall regions of South Africa. The use of D. noxia resistant cultivars may reduce the impact of this pest on cereal production, at the... -
Physiological response of groundnut (Arachis hypogaea L.) to thinning time and intensity after anthesis
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. J.P. Tarimo --- Department of Crop Science and Production, Tanzania F. P.C. Blarney --- , AustraliaTwo experiments were carried out to study groundnut (Arachis hypogaea L.) response to thinning time and intensity after anthesis at Redland Bay Farm, Southeast Queensland, Australia, during 1987/88 (Experiment 1) and 1989/90 (Experiment 2). Six cultivars were included in Experiment... -
Genotype × environment interaction and principal factor analysis of seed characteristics related to canning quality of small white beans (Phaseolus vulgaris L.) in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.F. de Lange --- Department of Plant Breeding, Republic of South Africa M.T. Labuschagne --- Department of Plant Breeding, Republic of South AfricaAnalysis of variance, correlation analysis and principal factor analysis were applied to data for 23 sensory and physico-chemical traits measured on five cultivars of small white canning beans (Phaseolus vulgaris L.) planted at five localities in the 1995–96 season. Trait... -
Yield components of samples of two wild Mexican common bean (Phaseolus vulgaris L.) populations grown under cultivation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.S. Bayuelo-Jiménez --- Botánica, Instituto de Recursos Naturales, México C.B. Peña-Valdivia --- Botánica, Instituto de Recursos Naturales, México J. Rogelio Aguirre R. --- Instituto de Investigación en Zonas Desérticas, México.The common bean (Phaseolus vulgaris L.) is an annual crop legume with wild ancestors distributed from Mexico to northern Argentina. In Mexico, wild populations occur throughout this physiographically and climatically diverse country. Such a wide distribution of common bean populations... -
A critical soil sulphur level for maize (Zea mays L.) grown in a glasshouse
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. Grobler --- Department of Plant and Soil Science, Republic of South Africa A.A. Bloem --- Department of Agriculture North West Province, Republic of South Africa A.S. Claassens --- Department of Plant Production and Soil Science, Republic of South AfricaSulphur is an essential nutrient for the production of the amino acids cysteine and methionine, which are important for protein syntheses. Previous studies showed that sulphur deficiencies are becoming common because of the tendency to use more concentrated and liquid... -
The effect of clone type and method of transportation on oil yield from vegetative material of Eriocephalus punctulatus
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.N. Webber --- Department of Livestock and Pasture Science, Republic of South Africa M.L. Magwa --- Electron Microscope Unit, J. van Staden --- Department of Botany, University of Natal Pietermaritzburg, Republic of South AfricaEriocephalus punctulatus, also known as, ‘Kapok Bos’, belongs to the Asteraceae family. It is an attractively scented woody shrub, that reaches a height of about one metre. It produces a highly priced essential oil with a dark blue colour and... -
The development of harvesting schedules and post-harvesting management practices relative to oil yield of Eriocephalus punctulatus
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.N. Webber --- Department of Livestock and Pasture Science, Republic of South Africa M.L. Magwa --- Electron Microscope Unit, J. van Staden --- Department of Botany, University of Natal Pietermaritzburg, Republic of South AfricaThe first phase in the domestication programme of Eriocephalus punctulatus involved establishing how this crop could be harvested without adversely affecting plant vigour and longevity. The second phase of the domestication programme was the development of harvesting schedules that would... -
Resistance of little seeded canary grass (Phalaris minor Retz.) to ACC-ase inhibitors
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Smit --- , Republic of South Africa A. L.P. Cairns --- Department of Agronomy, Republic of South AfricaSince 1996, several incidents of poor weed control regarding little seeded canary grass (Phalaris minor Retz.) in wheat (Triticum aestivum L.) production have been reported from the Western Cape. Little seeded canary grass showed indications of resistance towards ACC-ase inhibitors... -
The effect of environment and cultivar on sunflower seed. I. Yield, hullability and physical seed characteristics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Nel --- , Republic of South Africa H.L. Loubser --- , Republic of South Africa P.S. Hammes --- Department of Plant Production and Soil Science, Republic of South AfricaThe quality of South African sunflower oil cake varies and often has an unacceptably low protein and high crude fibre content. Poor hullability of the seed is generally regarded as the primary cause thereof. This study examines the contribution of... -
Effects of Casuarina-amended soil on selected soil and citrus properties
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.W. Mashela --- Department of Plant Production, Republic of South AfricaEffects of beefwood (Casuarina cunninghamiana Miq.) leaf residues were evaluated on soil pH, soil electrical. conductivity, growth and foliar nutrient ions of rough lemon (Citrus jambhiri Hush) seedlings in two greenhouse experiments. Casuarina- amended soil reduced soil pH, root weight,... -
Electrophoresis of leaf and seed proteins of Englerophytum natalense (fam. Sapotaceae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H. Ham --- Department of Forestry, South Africa M. Bosman --- , South Africa P.J. Vorster --- Department of Botany, South AfricaEnglerophytum natalense is an indigenous South African tree, bearing edible fruits. In view of its potential for domestication, leaf and seed proteins were separated electrophoretically in order to investigate the existence and degree of variation within and between populations in... -
Scarification and stratification of Combretum erythrophyllum (Burchell) seed and fruit for uniformity in germination
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. Wickens --- Applied Natural Sciences, Republic of South Africa W.G. Gaum --- Applied Natural Sciences, Republic of South AfricaDifferent scarification and stratification processes were used to soften River Bushwillow or Combretum etythrophyllun (Burchell) fruit and seed coverings and to determine the percentage, rate and uniformity of germination. Treatments included stratification, hot water scarification, leaching in cold water, soaking... -
Phytotoxicity of seven graminicides on maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. E.J. Saayman-du Toit --- , South AfricaPhytotoxicity of single and double dosages of metolachlor, dimethenamid, acetochlor A and B, alachlor, flufenacet and a mixture of atrazine-sulcotrione, were evaluated on maize (Zea mays L.) in a greenhouse, using soil with a clay content of less than 10%... -
Grondgeassosieerde, lineêre plantegroeipatrone in die Warmbadomgewing van die Limpopo-provinsie van Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Dinkelmann --- Departement Geografie en Omgewingstudies, E. Verster --- Departement Geografie en Omgewingstudies, T.H. van Rooyen --- Departement Geografie en Omgewingstudies,Lineêre mikroreliëfverskynsels wat op lugfoto's soos vingerafdrukpatrone vertoon en bestaande uit boomryke kruine en grasryke trôe is op die voethang van die Baviaansberg, Warmbadomgewing (Suid-Afrika) beskryf. Vir die doel om die oorsprong van die verskynsels te verklaar is van 'n... -
Status of resistance of sorghum hybrids to the aphid, Melanaphis sacchari (Zehntner) (Homoptera: Aphididae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. van den Berg --- , South AfricaFour field trials were conducted over four seasons during the period from 1996/97 to 2000/2001 to determine the status of resistance of South African sorghum hybrids to natural infestation by the aphid Melanaphis sacchari. Aphid damage symptoms were evaluated on... -
Phytotoxicity resulting from a combination of a pre-emergence herbicide and a pesticide seed dressing in maize (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. E. J. Saayman-du Toit --- , South AfricaThis study was prompted by reports from maize producers, indicating phytotoxicity to occur when using pre-emergence herbicides in combination with seed dressings under cold conditions on sandy soils. A greenhouse experiment was conducted in which the insecticide imidacloprid and the... -
The relationship between the phosphorus requirement and some phosphorus characteristics of selected soils of the South African tobacco industry
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.C. Henry --- , MarieF. Smith --- ,Estimates of the phosphorus requirement (P0.11) of 20 selected soils of the South African tobacco industry were interpolated from phosphorus sorption isotherms. The relationships between P0.11 and various soil phosphorus characteristics, including Bray 2 P content and various indices of... -
Effect of leaf feeding by Melanaphis sacchari (Zehntner) (Homoptera: Aphididae), on sorghum grain quality
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. van den Berg --- , South Africa A.J. Pretorius --- , South Africa M. van Loggerenberg --- , South AfricaA study was conducted to determine the effect of leaf feeding by the aphid, Melanaphis sacchari, on grain quality of sorghum. A field trial was planted with two sub-blocks. Each sub-block was planted with ten similar sorghum hybrids. One sub-block... -
A single point sorption test for the routine determination of the phosphorus requirement of low to moderate P-fixing soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.C. Henry --- , MarieF. Smith --- ,The phosphorus requirement (P0.11) of low to moderate P-fixing soils from the South African tobacco industry and KwaZulu-Natal was interpolated from multiple point P sorption isotherms. The relationship between P0.11 and a single point sorption measurement, consisting of the P... -
Relationships between Ambic 1 and Bray 1 extractable phosphorus in some South African arable soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. J.J. Schmidt --- , South Africa F.G. Adriaanse --- , South Africa C.C. du Preez --- Department of Soil, South AfricaSouth African analytical laboratories use different extractants for P in soils of which the most important are Bray 1, Ambic 1, Bray 2, Truog and Olsen. The fertilizer industry prefers to use Bray 1 extractions for fertilization recommendations and the... -
A study of the kinetics of the adsorption of phosphorus by selected South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.C. Henry --- , MarieF. Smith --- ,Plots of the decline of the concentration of phosphorus in soil suspensions over time were constructed for 23 selected soils from South Africa and, using non-linear regression analysis, various models were fitted to the time curves, including mechanistic first and... -
Threshold values for sulphur in soils of the main maize-producing areas of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. van Biljon --- , Republic of South Africa D. Fouche --- , Republic of South Africa A. D.P. Botha --- , Republic of South AfricaFertilizers introduced to South Africa after World War 2 contained sufficient sulphur (S) to satisfy the demands of all crops. However, dramatic shifts to high-analysis NPK fertilizers containing little or no S and restriction on sulphur dioxide emissions by industries... -
Reaction of potatoes to calcium and phosphate levels as affected by wind
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R. Barnard --- Department of Agronomy, Republic of South Africa N. J.J. Combrink --- Department of Agronomy, Republic of South AfricaIn an attempt to increase the number of mini tubers produced per potato plant, the effect of calcium and phosphorus nutrition was investigated. It is believed that high phosphorus (P) and low calcium (Ca) levels stimulate tuberization. Three nutrient solution... -
Potato mini tuber production affected by a short-term calcium deficiency
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R. Barnard --- Department of Agronomy, Republic of South Africa N. J.J. Combrink --- Department of Agronomy, Republic of South AfricaIt was previously reported that tuber initiation is restricted in soil-less production systems owing to a lack of mechanical resistance and that a low-pH shock treatment over a 10-h period alleviated this problem. Tuber initiation was investigated under soil-less conditions... -
Effects of sodium sulphate, sodium chloride and manganese sulphate on kikuyu (Pennisetum clandestinum) growth and ion uptake
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.J. Mills --- Department of Soil Science, South Africa M.V. Fey --- Department of Soil Science, South Africa C.E. Johnson --- Department of Civil and Environmental Engineering, USAIrrigation with saline water is increasingly practised yet an understanding of plant response to different salt types remains largely elusive. Our study investigated the effects of irrigation with simulated effluent containing three salts on the growth and composition of a... -
The relationship between soil morphology and soil water regime: preliminary results in the Weatherley catchment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.W. van Huyssteen --- Department of Soil, Crop and Climate Sciences, Republic of South Africa P. A.L. le Roux --- Department of Soil, Crop and Climate Sciences, Republic of South Africa M. Hensley --- Department of Soil, Crop and Climate Sciences, Republic of South AfricaSoil water contents were measured for five years at Weatherley, an intensively instrumented catchment in the north eastern part of the Eastern Cape Province. Soil water contents are expressed in terms of average duration of saturation with water above 0.7... -
Inheritance of resistance to Uromyces appendiculatus in the South African dry bean cultivar Kranskop
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Liebenberg --- , South Africa Z.A. Pretorius --- Department of Plant Sciences, South AfricaThe inheritance of resistance to race RSA-Ua7 of the rust pathogen Uromyces appendiculatus in the South African dry bean (Phaseolus vulgaris) cultivar Kranskop, as well as the relationship of rust resistance between Kranskop and the international rust differential cultivars Redlands... -
Comparison between methods for estimating sprout damage in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Barnard --- , South Africa C.S. van Deventer --- Department of Plant Science (Plant Breeding), Faculty of Natural and Agricultural Sciences, South Africa H. Maartens --- Department of Plant Science (Plant Breeding), Faculty of Natural and Agricultural Sciences, South AfricaSprouting in wheat is common when rain occurs during harvest. This causes the moisture content of the grain to increase to a level at which germination takes place and α-amylase increases. Various methods can be used to determine α-amylase in... -
Temperature and light requirements for the germination of Cleome gynandra seeds
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.O. Ochuodho --- School of Agricultural Sciences and Agribusiness, Pietermaritzburg A.T. Modi --- School of Agricultural Sciences and Agribusiness, PietermaritzburgSeeds of Cleome (Cleome gynandra L.) are characterised by low germination and may require after-ripening. The dormancy characteristics and optimum conditions for seed germination of this species have not been explained. The objective of this study was to investigate the... -
Phenotypic diversity for morphological and agronomic traits in traditional Ethiopian highland maize accessions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. Beyene --- Department of Plant Sciences, A.M. Botha --- Department of Genetics, South Africa A.A. Myburg --- Department of Genetics, South AfricaFarmers in the highlands of Ethiopia have developed locally adapted maize varieties for more than 300 years. In order to assess the phenotypic diversity among traditional Ethiopian highland maize accessions, a total of 180 accessions were evaluated for agro-morphological traits... -
Breeding for rust resistance increases dry bean productivity in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Liebenberg --- , South Africa A.J. Liebenberg --- , South Africa Z.A. Pretorius --- Department of Plant Sciences, South AfricaInfection of dry beans (Phaseolus vulgaris L.) by rust, caused by Uromyces appendiculatus Pers.: Pers. (Unger), results in regular yield and quality losses in South Africa. The growing of resistant varieties is generally considered the most cost effective control measure... -
Changes in inorganic phosphorus following incubation of some Zambian soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Kumoyo --- Department of Soil Science, Zambia O.A. Yerokun --- Department of Soil Science, Zambia M.I. Damaseke --- , ZambiaPhosphorus (P) deficiency is a major problem of many Zambian soils and annual applications of the recommended 60 kg P2O5 ha−1 (26 kg−1 ha−1) do not seem to reverse this trend. In order to better understand the dynamics of P... -
Anthocyanidin separation in exocarps of ‘Mauritius’ litchi (Litchi chinensis Sonn.) following methods to improve rind colour
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Kaiser --- Department of Horticultural Science, South Africa J. Levin --- Department of Biostatistics, South Africa B.N. Wolstenholme --- Department of Horticultural Science, South AfricaLitchi or lychee (Litchi chinensis Sonn.) fruit rinds are red due to the presence of water-soluble, vacuole-bound anthocyanin pigments. After harvest, these pigments decompose rapidly unless treated. Treatment with steam (95°C) for two seconds, followed by subsequent immersion in a... -
The relationship between the phosphorus requirement and Ambic 1 phosphorus content of selected South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.C. Henry --- , MarieF. Smith --- ,The phosphorus requirement (P0.11) of low to moderate P-fixing soils from the South African tobacco industry and KwaZulu-Natal was estimated from P sorption isotherms. The relationships between P0.11, Ambic 1 P, clay content and various indices of P sorption were... -
Effects of postharvest sulphur fumigation, steam and low pH treatments on polyphenol oxidase activity in litchi (Litchi chinensis Sonn.) fruit
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Kaiser --- Department of Horticultural Science, South Africa B.N. Wolstenholme --- Department of Horticultural Science, South AfricaThe effects of postharvest sulphur fumigation (0.6 kg elemental sulphur. 1000 kg−1 of fruit), steam (95°C) for two seconds, or steam (95°C) for two seconds followed by subsequent immersion in a zero pH solution for four minutes, on polyphenol oxidase... -
Indications of ferrolysis and structure degradation in an Estcourt soil and possible relationships with plinthite formation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. A.L. le Roux --- Department Soil, Crop and Climate Sciences, Republic of South Africa C.C. du Preez --- Department Soil, Crop and Climate Sciences, Republic of South Africa C. Bühmann --- , Republic of South AfricaGeographic associations of duplex soils, like the Estcourt form, and plinthic soils, like the Avalon and Westleigh forms, such as are found in the Eastern Free State, are recognised worldwide. These soils share redox morphology. In duplex soils, the redox... -
Retention of applied phosphorus by the benchmark soils of Lesotho and quantification of their phosphorus retention indices
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.F. Molete --- Department of Soil, Crop and Climate Sciences, South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, South Africa M.V. Marake --- Faculty of Agriculture, LesothoThis study was conducted with the objective of determining and quantifying the capacity of Lesotho's benchmark soils to retain applied P. The soils were incubated with a range of P levels for a period of 42 days, whereafter P retention... -
Yield retention of resistant wheat cultivars, severely infested with Russian wheat aphid, Diuraphis noxia (Kurdjumov), in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: VickiL. Tolmay --- , South Africa CS van Deventer --- Department of Plant Breeding, South AfricaRussian wheat aphid, Diuraphis noxia (Kurdjumov), has been a serious pest of wheat in South Africa since 1978. Wheat producers observed that resistant cultivars, developed for control of this aphid, differed in resistance and questioned whether insecticide treatment would be... -
Rind texture and juice acid content of Citrus spp. as affected by foliar sprays of mono-potassium phosphate (MKP), urea ammonium phosphate (UAP) and mono-ammonium phosphate (MAP)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F.N. Mudau --- Department of Plant Production, Republic of South Africa K.I. Theron --- Department of Horticultural Science, Republic of South Africa E. Rabe --- Department of Horticultural Science, Republic of South AfricaRind coarseness of fruit of Citrus spp. is a general problem in the Citrusdal region of South Africa (Western Cape Province), often limiting the percentage of exportable fruit. Acid content of the juice of Citrus fruit is an important determinant... -
Interpretation of digital soil photographs using spatial analysis: I. Methodology
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.W. van Huyssteen --- Department of Soil, Crop and Climate Sciences, South Africa P. A.L. le Roux --- Department of Soil, Crop and Climate Sciences, South Africa M. Hensley --- Department of Soil, Crop and Climate Sciences, South AfricaSystems for the evaluation of soil wetness use soil colour extensively. The determination of soil colour normally relies on the user's perception of colour and usually employs a colour matching system, e.g. Munsell Soil Color Charts. The South African soil... -
Interpretation of digital soil photographs using spatial analysis: II. Application
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.W. van Huyssteen --- Department of Soil, Crop and Climate Sciences, South Africa P. A.L. le Roux --- Department of Soil, Crop and Climate Sciences, South Africa M. Hensley --- Department of Soil, Crop and Climate Sciences, South AfricaColour variation in digital photographs of soils was quantified and classified meaningfully, using ArcView Spatial Analyst. This procedure holds great promise for the unbiased and quantitative determination of soil colour properties and statistical correlation with related soil hydrological conditions. The... -
Phytotoxicity resulting from pre-emergence graminicides in sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. E. J. Saayman-du Toit --- , South AfricaThis study was prompted by sorghum (Sorghum bicolor (L.) Moench) producers reporting phytotoxicity when using graminicides under unfavourable environmental conditions. A greenhouse experiment was conducted in which five graminicides were evaluated at two temperature regimes, using 10 cultivars. Registered dosage... -
Genetic distance analysis of elite cassava (Manihot esculenta Crantz) genotypes in Malawi using morphological and AFLP marker techniques
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: I. R.M. Benesi --- Department of Plant Sciences, South Africa M.T. Labuschagne --- Department of Plant Sciences, South Africa A. G.O. Dixon --- , Nigeria C.D. Viljoen --- Department of Plant Sciences, South Africa N.M. Mahungu --- , MalawiCassava is the second most important staple food crop in Sub-Saharan Africa and is also an important food and cash crop in Malawi. A prerequisite for any genetic improvement programme is knowledge of the extent of genetic variation present between... -
Acidity/Al aspects in soils of the Lusikisiki area, Eastern Cape Province
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Bühmann --- , D.J. Beukes --- , D.P. Turner --- ,Soil acidity related parameters like pH, extractable and soil organic matter bound Al, amorphous Al phases and Al substitutions in secondary iron minerals were determined on 57 samples from 15 representative soil profiles from the Lusikisiki area. The pH (H2O)... -
Plant nutrient status of soils of the Lusikisiki area, Eastern Cape Province
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Bühmann --- , D.J. Beukes --- , D.P. Turner --- ,The aim of the paper is to Identify major soil plant fertility constraints for 15 soil profiles from the Lusikisiki area of the Eastern Cape Province of South Africa. Phosphorus levels were very low, with 87% of the A horizons... -
Regional sustainability in table grape production on saline soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. P. de Clercq --- Department of Soil Science, South Africa M. Van Meirvenne --- Department of Soil Management and Soil Care, BelgiumA study was done in South Africa to investigate the state of the soil salt content and its effect on plant growth on a regional rather than a point basis. The study site went through a development phase since 1996... -
Nature and distribution of South African plinthic soils: Conditions for occurrence of soft and hard plinthic soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. A.L. le Roux --- Department of Soil, Crop and Climate Sciences, Republic of South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, Republic of South AfricaThe relevance of using redox morphology and irreversible hardened material to classify soft and hard plinthic soil forms is often questioned as the paleoclimate of South Africa varied significantly. Since the origin of the Soil Classification System of South Africa... -
In-vitro inhibition of mycelial growth of several phytopathogenic fungi by soluble potassium silicate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T.F. Bekker --- Department of Plant Production and Soil Science, C. Kaiser --- Department of Plant Production and Soil Science, R. v.d. Merwe --- department of Microbiology and Plant Pathology, N. Labuschagne --- department of Microbiology and Plant Pathology,Soluble silicon has been reported to suppress some plant diseases, but in vitro inhibition of phytopathogenic fungi has not been demonstrated. In the current study in-vitro dose-responses towards soluble potassium silicate (20.7% SiO2) were determined for Phytophthora cinnamomi, Sclerotinia sclerotiorum,... -
The effects of strategic nitrogen fertiliser application during the cool season on perennial ryegrass-white clover pastures in the Western Cape Province 4. Selected nutritive characteristics and mineral content
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Labuschagne --- , South Africa M.B. Hardy --- Department of Agriculture Western Cape, South Africa G.A. Agenbag --- , South AfricaThe influence of a single application of fertiliser N (0, 50, 100 and 150 kg N ha−1) applied in either autumn, early winter, late winter, early spring or late spring on selected nutritive and mineral parameters of a perennial ryegrass-white... -
Extractable soil phosphorus threshold values for dryland maize on the South African Highveld
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. J.J. Schmidt --- , South Africa F.G. Adriaanse --- , South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, South AfricaThe principle objective of this study was to establish P fertilizer guidelines for dryland maize on the South African Highveld according to the sufficiency concept of soil extractable P. Data sets from nine different P fertilizer trials at various localities... -
Comparison of maize genotypes for grain yield, nitrogen uptake and use efficiency in Western Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D. Tolessa --- Department of Soil, Crop and Climate Sciences, South Africa C.C. Du Preez --- Department of Soil, Crop and Climate Sciences, South Africa G.M. Ceronio --- Department of Soil, Crop and Climate Sciences, South AfricaNitrogen is the most limiting nutrient in the production of maize in western Ethiopia with its favourable climate for this crop. This is because Nitisols inherently low in N are used for maize production by resource-poor farmers who cannot afford... -
The effects of chlormequat chloride and ethephon on agronomic and quality characteristics of South African irrigated wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S. Ramburan --- , P.L. Greenfield --- School of Agricultural Sciences & Agribusiness, Crop Science Discipline,Plant growth regulators (PGR's) that reduce lodging have not been evaluated on commercial wheat cultivars under local irrigated conditions. The objective of this study was to assess the effects of PGR's on agronomic and quality parameters of three wheat cultivars... -
Evaluation and identification of old and new macadamia cultivars and selections at Pietermaritzburg
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. Allan --- Horticultural Science, South AfricaNewer and older cultivars and selections of macadamias have been evaluated at Pietermaritzburg over periods of from five to 35 years. In their sixth year, trees of some of the newer selections have produced good yields of over 10 kg... -
Gene action determining Phaeosphaeria leaf spot disease resistance in experimental maize hybrids
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Derera --- , Republic of South Africa P. Tongoona --- , Republic of South Africa B.S. Vivek --- , Zimbabwe N. van Rij --- KwaZulu-Natal Department of Agriculture and Environmental Affairs, Republic of South Africa M.D. Laing --- , Republic of South AfricaPhaeosphaeria leaf spot (Phaeosphaeria maydis Henn.) has the potential to cause substantial yield losses in maize. Maize is grown by small-scale farmers without fungicides; hence there is need to breed for resistance in regionally adapted germplasm. Little information about the... -
Effect of segregation distortion on genetic mapping of a PI 294994-derived Russian Wheat Aphid resistance gene
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.F. Marais --- Department of Genetics, South Africa W. Boshoff --- , South Africa F. du Toit --- , South AfricaAn earlier genetic mapping study with an unidentified Russian Wheat Aphid resistance gene, referred to as Dn? and derived from PI 294994, suggested that the gene occurs close to the centromere on 7DS. Closer inspection of the map data showed... -
Use of ethephon and chlormequat chloride to manage plant height and lodging of irrigated barley (cv. Puma) when high rates of N-fertiliser are applied
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S. Ramburan --- , P.L. Greenfield --- ,The objective of this study was to evaluate the effects of the plant growth regulators (PGR's) chlormequat, ethephon and their combination on plant height, lodging, grain yield and yield components of ‘Puma’ barley with differing amounts of N (120, 150... -
Measuring water stress in Pinus patula Schiede ex Schlect. & Cham. seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.A. Rolando --- , K.M. Little --- ,A pot trial was conducted to investigate measures of water stress for Pinus patula seedlings planted for commercial forestry in South Africa. The objectives were to determine the efficacy of different equipment for quantifying water stress, and the effect of... -
Alternative hosts of Asian soybean rust (Phakopsora pachyrhizi) in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Nunkumar --- , South Africa P.M. Caldwell --- , South Africa Z.A. Pretorius --- Department of Plant Sciences, South AfricaPhakopsora pachyrhizi Syd., the causal organism of Asian soybean rust (ASR) is an obligate parasite and cannot survive independently of its hosts or on debris. Thirteen legume species were tested for susceptibility to P. pachyrhizi. The abaxial leaf surface of... -
Significance of kernel moisture content in determination of Hagberg Falling Number in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. Craven --- , South Africa A. Barnard --- , South Africa M.T. Labuschagne --- , South AfricaThe effect of early termination of kernel filling (early harvest) on the Hagberg Falling Number (HFN) was investigated over a four-year period. Selected South African wheat cultivars were harvested at different stages of kernel development, determined by kernel moisture content... -
Relations between phosphorus retention parameters and some other properties of benchmark soils in Lesotho
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.F. Molete --- Department of Soil, Crop and Climate Sciences, South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, South Africa M.V. Marake --- , LesothoThe benchmark soils of Lesotho are characterized by high P retention and this aspect should be accommodated in fertilization programmes. This together with long procedures for determination of P retention parameters and a lack of information on the relations between... -
Relationships between plant and soil nutrient status and position in the landscape on Pellic Vertisols of Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lemma Gizachew --- , Ethiopia G.N. Smit --- Department of Animal, Wildlife and Grassland Sciences, South AfricaEffects of land use on soil nutrients and related soil parameters of Pellic Vertisols were assessed using soil samples collected from plots subjected to the cultivation of tef (Eragrostis tef) (TF) and grass pea (Lathyrus sativus) (GP) and native grassland... -
Substrates for soil-less Disa production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D. Pienaar --- Department of Agronomy, Republic of South Africa N.J.J. Combrink --- Department of Agronomy, Republic of South AfricaThe effects of different substrates were investigated as root media for soil-less Disa production. In a first study, tissue cultured plantlets were hardened. In a second study, hardened plantlets were grown to the early flowering stage. In both cases, a... -
Long-term kinetics of phosphate desorption from soil and its relationship with plant growth
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.M. Taddesse --- , Republic of South Africa A.S. Claassens --- , Republic of South Africa P.C. de Jager --- , Republic of South AfricaKnowledge on the availability of residual P in soils is of great importance for fertilization management. The use of dialysis membrane tubes filled with hydrous ferric oxide solution has recently been reported as an effective way to characterize P desorption... -
Bio-stimulatory properties in seeds of plants from the families Caryophyllaceae and Fabaceae with application potential in agriculture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.C. Pretorius --- , South Africa A. Du Plessis --- , South Africa E. van der Watt --- , South AfricaA comparative investigation into the bio-stimulatory activity of seed suspensions from two South African plant species belonging to each of the families Caryophyllaceae and Fabaceae were conducted using ComCat®, a commercially available bio-stimulant, as a positive control. These included Acacia... -
Efficacy of glyphosate, alternative post-emergence herbicides and tillage for control of Cynodon dactylon
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: PL Campbell --- , Republic of South AfricaCynodon dactylon (L.) Pers (cynodon) is a major weed in the South African sugarcane industry. Current recommendations involve repeated application of glyphosate for prolonged control. This paper describes three trials of a study to identify alternative treatments. Trial 1 screened... -
Image analysis to quantify herbicide efficacy for Cynodon dactylon control
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Campbell --- , Republic of South Africa M.T. Smith --- , Republic of South Africa C. Sewpersad --- , Republic of South Africa M. van den Berg --- , Republic of South AfricaStudies on the effectiveness of herbicides for control of Cynodon dactylon (L.) Pers. (cynodon) normally rely on visual recording methods, which are rapid and convenient, but lack objectiveness and reproducibility. To address this problem, a computer software package was customized... -
A review of advances in hydropedology for application in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.W. van Huyssteen --- , South AfricaHydropedology is internationally a new and fast-growing science. It is therefore pertinent to take heed of developments in this regard to guide current and future research in South Africa. This paper aims to discuss the initiation and advances in the... -
Effects of sugar cane (Saccharum hybrid sp.) cropping on soil acidity and exchangeable base status in Mauritius
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. R. Ng Cheong --- , Mauritius K. F. Ng Kee Kwong --- Department of Soil, Crop and Climate Sciences, South Africa C. C. Du Preez --- , MauritiusContinuous sugar cane cropping commonly leads to soil acidification. Such an effect can be attributed to N fertilization and to leaching and removal of exchangeable bases. A study was conducted on the five zonal soils of Mauritius to ascertain whether... -
Effect of tillage system and nitrogen fertilization on efficacy of applied nitrogen by maize in Western Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D. Tolessa --- Department of Soil, Crop and Climate Sciences, South Africa C.C. Du Preez --- Department of Soil, Crop and Climate Sciences, South Africa G.M. Ceronio --- Department of Soil, Crop and Climate Sciences, South AfricaNitrogen is the most limiting nutrient for maize production under conventional and minimum tillage systems in western Ethiopia. Thus application of N is essential to sustain production in the region. However, very little is known about the efficiency of the... -
The antifungal activity of potassium silicate and the role of pH against selected plant pathogenic fungi in vitro
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. F. Bekker --- Department of Plant Production and Soil Science, South Africa C. Kaiser --- , USA N. Labuschagne --- Department of Microbiology and Plant Pathology, South AfricaIn-vitro inhibition of mycelial growth of phytopathogenic fungi grown on potassium silicate amended media has been demonstrated. In the current study the respective effects on fungal growth of changes in the pH of growth medium with increased concentrations of potassium... -
Soil properties changes after short-term livestock exclusion in “degraded” communally managed rangelands in the western Bophirima District, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.S. Moussa --- , South Africa L. Van Rensburg --- , South Africa K. Kellner --- , South AfricaLivestock grazing and detrimental overgrazing are commonly associated with severe rangeland degradation particularly in communally managed pastoral systems in South Africa. Effects of grazing exclusion on vegetation are well documented, but there is a dearth of quantitative research conducted in... -
Comparison of SSR and AFLP analysis for genetic diversity assessment of Ethiopian arabica coffee genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Yigzaw Dessalegn --- , Ethiopia Liezel Herselman --- Department of Plant Sciences, Maryke Labuschagne --- Department of Plant Sciences,Knowledge of genetic diversity within and among genotypes of any crop is fundamental for estimation of the potential genetic gain in a breeding programme and effective conservation of available genetic resources. Currently, different molecular marker techniques are being developed for... -
Morpho-physiological response of durum wheat genotypes to drought stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.F. Solomon --- Department of Plant Sciences, South Africa M.T. Labuschagne --- Department of Plant Sciences, South AfricaThe impact of moisture stress on phenology and growth varies for genotypes and the growth stages at which stress is encountered. The aim of this study was to determine the effect of moisture stress on some morpho-physiological traits of durum... -
Obtaining the parameters required to model labile phosphorus for South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. Van der Laan --- Department of Plant Production and Soil Science, South Africa J.G. Annandale --- Department of Plant Production and Soil Science, South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, South Africa S.A. Lorentz --- , South AfricaModelling phosphorus (P) in the environment can increase our understanding of potential transfer pathways into receiving water bodies as well as the plant availability of this nutrient in soil. Many current models make use of algorithms originally developed for the... -
Advances in soil physics: Application in irrigation and dryland crop production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.D. van Rensburg --- Department of Soil, Crop and Climate Sciences, South AfricaThis is the third soil physics review to be published in South African Journal of Plant and Soil. In the previous reviews the focus was broad and covered almost every aspect of the subject, providing a comprehensive list of contributions... -
Crop physiology: A perspective for southern Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.T. Modi --- , P.L. Greenfield --- ,Crop physiology is a broad subject and a comprehensive treatise of all its aspects is impossible, even in a whole volume dedicated to the subject. With a few exceptions, plant physiology, rather than crop physiology, is commonly the focus when... -
Phytophtho citophthro trunk and branch canker on Clementine mandarins in the Western Cape province of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.C. Schutte --- , South Africa W.J. Botha --- , South AfricaBark and soil samples collected from trunks of Clementine mandarin cv. `Nules’ orchards in the Knysna area of South Africa were used for isolations to determine the cause of a canker on tree trunks. Phytophthora citrophthora was the predominant species... -
Screening of some South African maize (Zea mays L.) cultivars for acetochlor tolerance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Allemann --- Department of Soil, South Africa P.M. Mphundi --- Department of Soil, South AfricaAcetochlor containing a safener is registered for pre-emergence use on maize to control mainly annual grasses. It is applied at rates of between 0.49 and 1.89 kg ai ha-~ on soils with a clay content from <10% to 55%. Some... -
Preliminary assessment of bambara groundnut (Vigna subterranea L.) landraces for temperature and water stress tolerance under field conditions in Botswana
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Sesay --- Botswana College of Agriculture, Botswana T. Mpuisang --- Botswana College of Agriculture, Botswana T.S. Morake --- Department of Agricultural Research, Ministry of Agriculture, I. Al-Shareef --- School of Bioscience, Department of Plant and Crop Science, UK H.J. Chepete --- Botswana College of Agriculture, Botswana B. Moseki --- Department of Biological Sciences, BotswanaField experiments were conducted in 2006/07 and 2007/08 in Botswana to study the response of bambara groundnut to heat stress (2006/07 season) and to heat stress and soil moisture deficit stress (2007/08 season). In both seasons selected bambara groundnut landraces... -
Photosynthetic capacity and diurnal gas exchange of ‘Brookfield Gala’ apple leaves under three irrigation systems
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T.C. Lebese --- Department of Horticultural Science, South Africa P.J.C. Stassen --- , South Africa S.J.E. Midgley --- Department of Horticultural Science, South AfricaWater and nutrient application using three irrigation systems, namely daily drip irrigation, pulsing drip irrigation and micro irrigation were studied with respect to photosynthetic efficiency, water use efficiency and leaf water relations in ‘Brookfield Gala’ apple trees during 2004/5 and... -
Involvement of reactive oxygen species generating enzymes and hydrogen peroxide in the rust resistance response of sunflower (Helianthus annuus L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. Mohase --- Department of Plant Sciences, South Africa A.J. der Westhuizen --- Department of Plant Sciences, South Africa Z.A. Pretorius --- Department of Plant Sciences, South AfricaActivities of potential reactive oxygen species generating enzymes and the subsequent production of H2O2, were investigated during the rust (Puccinia helianthi)—sunflower interaction using resistant (PhRR3) and susceptible (S37–388) lines. The resistance response was associated with induced activities of NADPH oxidase... -
A rapid demonstration of the self-thinning rule using radish
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F.R. Smith --- , South AfricaThe self-thinning rule describes the relationship between individual mass and density in crowded evenly-aged plant populations in which the slope of the relationship is always greater than -1. This study investigated whether the rule could be demonstrated in six weeks... -
Macro and micro element requirements of young and bearing apple trees under drip fertigation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Grace N. Kangueehi --- Department of Horticultural Science, South Africa P.J.C. Stassen --- , South Africa K.I. Theron --- Department of Horticultural Science, South Africa J. Wooldridge --- , South Africa‘Brookfield Gala’ apple trees on Merton 793 rootstock were planted on a loam sand soil at 2000 trees ha−1, trained to a central leader using the solaxe system and supplied with nutrients by drip fertigation. Trees were individually excavated at... -
Open-top chamber facility to study air pollution impacts in South Africa. Part II: SO2–drought interactions on yield, photosynthesis and symbiotic nitrogen fixation in soybean
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E Heyneke --- School of Environmental Science and Development, South Africa AJ Strauss --- School of Environmental Science and Development, South Africa RJ Strasser --- Bioenergetics Laboratory, Switzerland GHJ Krüger --- School of Environmental Science and Development, South AfricaSouth Africa has an extremely energy-intensive economy, resulting in substantial air pollution through its coal-fired power stations. Modelled sulphur dioxide (SO2) concentrations on the central Highveld mostly range between 10 and 50 ppb, exceeding 50 ppb in source areas. Well-watered... -
Isolation, identification and molecular characterisation of an isolate of Zucchini yellow mosaic virus occurring in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L Usher --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa B Sivparsad --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa A Gubba --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South AfricaZucchini yellow mosaic virus (ZYMV) is an economically important virus infecting cucurbits and has a worldwide distribution. In the Republic of South Africa, ZYMV has been reported as a major limiting factor to cucurbit production. The aim of this study... -
Yield and quality response of rose geranium (Pelargonium graveolens L.) to sulphur and phosphorus application
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MM Sedibe --- School of Environmental Health and Agriculture, South Africa J Allemann --- Department of Soil, Crop and Climate Sciences, South AfricaSulphur and phosphorus are essential plant macronutrients. Sulphur is involved in the formation of chlorophyll, activation of enzymes and is part of coenzyme A. Phosphorus forms part of the structure of nucleic acids and phospholipids. Two separate studies were conducted... -
Control measures for the encroacher shrub Seriphium plumosum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: HA Snyman --- Department of Animal, Wildlife and Grassland Sciences, South AfricaSeriphium plumosum encroachment in South Africa has converted extensive areas of grassland into less productive shrubland–grassland, but its control is not being seriously addressed at present. Therefore, the short-term response of S. plumosum to different applications of nitrogen (N), phosphate... -
Host-specificity testing of Puccinia xanthii var. parthenii-hysterophorae, a potential biocontrol agent for Parthenium hysterophorus in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Estianne Retief --- , South Africa Khayalethu Ntushelo --- , South Africa AlanR Wood --- , South AfricaFollowing its introduction into Australia, the rust fungus Puccinia xanthii var. parthenii-hysterophorae has played an important role in the integrated approach to manage Parthenium hysterophorus. The rust was imported from Australia and established within quarantine facilities in South Africa. Supplementary... -
Phosphorus enhances aluminium tolerance in both aluminium-tolerant and aluminium-sensitive wheat seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MT Iqbal --- Department of Agronomy and Agricultural Extension, BangladeshSeedlings growing in acid soils suffer both phosphorus (P) deficiency and aluminium (Al) toxicity stresses. An experiment was conducted to study the effects of Al and P interaction on Al-tolerant (ET8) and Al-sensitive (ES8) wheat genotypes in an acid soil... -
Growth, phenological and yield responses of a bambara groundnut (Vigna subterranea (L.) Verdc.) landrace to imposed water stress under field conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Tafadzwanashe Mabhaudhi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South Africa AlbertT Modi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaBambara groundnut (Vigna subterranea (L.) Verdc.) is an underutilised species with potential to contribute nutritional and food security in marginal areas. Growth, phenology and yield of a local bambara groundnut landrace from Jozini, KwaZulu-Natal, characterised into three selections according to... -
Phytochemical content, antioxidant capacity and physicochemical properties of pomegranate grown in different microclimates in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Asanda Mditshwa --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Faculty of AgriSciences, South Africa OlaniyiA Fawole --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Faculty of AgriSciences, South Africa Fahad Al-Said --- Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultanate of Oman Rashid Al-Yahyai --- Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultanate of Oman UmezuruikeL Opara --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Faculty of AgriSciences, South AfricaWe investigated the antioxidant and physicochemical properties of pomegranate (Punica granatum cv. Bhagwa) fruit grown in three microclimates in South Africa. The physicochemical properties of fruit peel and arils differed among the growing locations, including weight and redness color of... -
Characterisation of alkaline tailings from a lead/zinc mine in South Africa and evaluation of their revegetation potential using five indigenous grass species
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: LouisW Titshall --- School of Agriculture, Earth and Environmental Sciences, South Africa JeffreyC Hughes --- School of Agriculture, Earth and Environmental Sciences, South Africa H Christopher Bester --- School of Agriculture, Earth and Environmental Sciences, South AfricaTailings from a lead/zinc (Pb/Zn) mine were characterised and their revegetation potential investigated under glasshouse conditions using five grass species with three rates of inorganic fertiliser. The tailings were alkaline with low nutrient concentrations but high total and extractable Zn... -
Effect of pH on growth, mineral content and essential oil quality of buchu (Agathosma betulina) grown under controlled conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Babalwa Ntwana --- Department of Agronomy, South Africa G André Agenbag --- Department of Agronomy, South Africa Petrus Langenhoven --- , South AfricaBuchu (Agathosma betulina) is a traditional medicinal plant in the Western Cape province of South Africa and the essential oil derived from the leaves is exported in large volumes. The essential oil is not only used for medicinal purposes, but... -
Morphological characters and ascorbic acid content of an elite genotype of Corchorus olitorius: the influence of moisture stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AnofiOT Ashafa --- Department of Plant Sciences, South Africa AbidemiA Abass --- Department of Botany, Nigeria Titilola Osinaike --- Department of Botany, Nigeria FrancisB Lewu --- Agriculture Department, South AfricaMoisture stress can be deleterious to physicochemical properties of crop species to a varying degree. The influence of moisture stress on the ascorbic acid content in the leaf and morphological characters of an elite genotype of Corchorus olitorius were tested... -
Elucidation of seasonal pigmentation patterns in the involucral leaves of Leucadendron ‘Safari Sunset’
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael Schmeisser --- Department of Horticultural Science, South Africa Gerard J Jacobs --- Department of Horticultural Science, South Africa Willem J Steyn --- Department of Horticultural Science, South AfricaThis study investigates seasonal pigmentation patterns found in the involucral leaves of Leucadendron ‘Safari Sunset’, with the long-term aim of colour manipulation. Treatments comprised deconed shoots and shoots in which the opening of the flower head was physically prevented. During... -
The function of regreening in yellow female Leucadendron (Proteaceae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael Schmeisser --- Department of Horticultural Science, South Africa Gerard J Jacobs --- Department of Horticultural Science, South Africa Willem J Steyn --- Department of Horticultural Science, South AfricaWhat do female Leucadendron stand to gain by regreening their involucral leaves rather than discarding them after flowering? Regreening of involucral leaves could contribute to the carbon budget and/or protect the developing cone-shaped inflorescence during seed development. This was determined... -
The effect of canola (Brassica napus) as a biofumigant on soil microbial communities and plant vitality: a pot study
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Clarissa Potgieter --- North-West University, South Africa Misha De Beer --- North-West University, South Africa Sarina Claassens --- North-West University, South AfricaCanola (Brassica napus) may be incorporated into soil as a biofumigant for control of pathogens such as Sclerotinia sclerotiorum. Yet, the effect of biofumigants on natural microbial communities required to maintain soil functions is still unclear. A pot experiment with... -
Recent population trends of African penguins Spheniscus demersus in Namibia
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: J. Kemper J-P. Roux P. A. Bartlett Y. J. Chesselet J. A. C. James R. Jones S. Wepener F. J. MolloyThe African penguin Spheniscus demersus is endemic to southern Africa and is listed overall as "vulnerable". Over the past century, however, the Namibian population has been severely reduced and is currently listed as "critically endangered". Recent trends at Possession, Halifax,... -
Identification and classification of vertical chlorophyll patterns in the Benguela upwelling system and Angola-Benguela front using an artificial neural network
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: N. F. Silulwane A. J. Richardson F. A. Shillington B. A. Mitchell-InnesInformation on the vertical chlorophyll structure in the ocean is important for estimating integrated chlorophyll a and primary production from satellite. For this study, vertical chlorophyll profiles from the Benguela upwelling system and the Angola-Benguela front were collected in winter... -
Assessment of the monkfish Lophius vomerinus resource off Namibia
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: L. Maartens A. J. BoothThe Lophius vomerinus component of the monkfish resource off Namibia was assessed by means of deterministic length- and age-based models. Steady state length cohort analyses illustrated that, although the model was sensitive to the rate of natural mortality, it was... -
Quantifying commercial catch and effort of monkfish Lophius vomerinus and L. vaillanti off Namibia
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: L. Maartens A. J. BoothAbundance and exploitation patterns of monkfish Lophius vomerinus and L. vaillanti were investigated for use as inputs into a stock assessment framework to be used for management of the Namibian monkfish resource. Total numbers of monkfish caught per size-class were... -
A new species of threadsnake in the genus Myriopholis (Squamata: Scolecophidia: Leptotyplophidae) from southeastern Kenya
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Patrick K. Malonza --- National Museums of Kenya, KenyaA new threadsnake species from the family Leptotyphlopidae, Myriopholis mackayi sp. nov., is described from the Tsavo area in southeastern Kenya. Myriopholis mackayi sp. nov. is a member of the Myriopholis longicauda group on the basis of having a low... -
Aspects of the population biology of Octopus vulgaris in False Bay, South Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: C. D. Smith C. L. GriffithsThe population biology of the octopus Octopus vulgaris was studied from specimens collected by SCUBA in False Bay, South Africa, between 1997 and 1998. In all, 83% of the specimens collected were found in shelter. Small octopuses were more active... -
Socio-economic characteristics of gillnet and beach-seine fishers in the Western Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: K. Hutchings S. J. Lamberth J. K. TurpieData collected by questionnaire and telephone surveys conducted during 1998 and 1999 are used to describe the socio-economic characteristics of inshore netfishers in the Western Cape. Approximately two-thirds of netfishers work or have worked in other fishing sectors and a... -
Diet of sardine Sardinops sagax in the southern Benguela upwelling ecosystem
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: C. D. Van Der LingenThe diet of sardine Sardinops sagax in the southern Benguela was investigated by microscopic examination of stomach contents. The relative dietary importance of prey size and prey type was assessed by calculating the carbon content of prey items. Sardine is... -
THE SUMMER CONDITION OF THREE EASTERN TRANSVAAL RESERVOIRS AND SOME CONSIDERATIONS REGARDING THE ASSESSMENT OF TROPHIC STATUS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R.D. Walmsley --- , South Africa D.F. Toerien --- , South AfricaSummer temperature, oxygen and light penetration profiles in the Da Gama, Klipkopje and Witklip Reservoirs are presented. Analysis of waters from different depths showed the presence of chemical stratification despite the absence of clear thermal stratification. An algal bioassay procedure... -
THE LIMNOLOGY OF SOME SOUTH AFRICAN IMPOUNDMENTS I. THE PHYSICO-CHEMICAL LIMNOLOGY OF HARTBEESPOORT DAM
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: W.E. Scott --- , South Africa M.T. Seaman --- , South Africa A.D. Connell --- , South Africa S.I. Kohlmeyer --- , South Africa D.F. Toerien --- , South AfricaHartbeespoort Dam is a eutrophic, warm monomictic lake with overturn occurring in April. The lake is stratified for about six months of the year and in late summer the stratification appears stable. Light penetration in the dam depends both on... -
CRITICAL POINT DRYING AS A PREPARATIVE TECHNIQUE FOR SCANNING ELECTRON MICROSCOPY AND ITS APPLICATION IN LIMNOLOGY
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R. H.M. Cross --- , South Africa B.R. Allanson --- , South Africa B.R. Davies --- , South Africa C. Howard-Williams --- , South AfricaThe preservation technique of critical point drying for use with the scanning electron microscope is described. A study of the periphyton community development on the aquatic macrophyte, Potamogeton pectinatus L. from the littoral zone of Swartvlei, southern Cape Province, is... -
PRELIMINARY RESULTS ON THE UPTAKE AND RELEASE OF 32P BY POTAMOGETON PECTINATUS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.H. Swanepoel --- , South Africa J.F. Vermaak --- , South AfricaThe absorption and release of 32PO4, by Potamogeton pectinatus L during winter was investigated using a partitioned container in which the roots were separated from the stems and leaves. 32PO4 is absorbed by the roots as well as the stems... -
AN INTRODUCTION TO THE LIMNOLOGY OF ROODEPLAAT DAM
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R.D. Walmsley --- , South Africa D.F. Toerien --- , South Africa D.J. Steÿn --- , South AfricaA two-year limnological survey between 1973 and 1975 showed that the Roodeplaat Dam is a warm monomictic impoundment which has stable thermal stratification during summer. Oxygen supersaturation of the surface waters and anaerobic conditions in the hypolimnion were encountered during... -
FACTORS INFLUENCING VIABLE BACTERIA IN A TURBID MAN-MADE IMPOUNDMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.F. Toerien --- , South Africa 0001 D.N. Sadie --- , South Africa 0001 P. Stegmann --- , South Africa 0001The numbers of aerobic heterotrophic bacteria in the waters and sediments of the small turbid impoundment, Wuras Dam, are very high (≥100 000 ml −1 and ≥ 1x106 bacteria g−1 respectively). Viable bacterial numbers in the open water seem to... -
REVERSED VERTICAL MIGRATION OF PLANKTONIC CRUSTACEANS IN A EUTROPHIC LAKE OF HIGH pH
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: A.D. Connell --- ,Two studies of the diel vertical migration of zooplankton in the hyper-eutrophic Hartbeespoort Dam, revealed that both in summer when the lake was anaerobic below 15 m depth, and in winter, when homogeneous, aerobic conditions existed throughout the water column,... -
THE INFLUENCE OF P-RETENTION BY SOILS AND SEDIMENTS ON THE WATER QUALITY OF THE LIONS RIVER
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: H.D. Furness C.M. BreenThe soils of Midmar dam catchment and the sediments of the Lions river are shown to have high P-retention properties. Present conditions result in little leaching of PO4 −4 from the soils and favour a net transport of P from... -
MASS CULTURE OF
MICROCYSTIS UNDER STERILE CONDITIONSItem type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: G. H.J. Krüger --- Botany Department, J.N. Eloff --- Botany Department,The design and use of a 601 all-glass culture system for the mass production of Microcystis (or other unicellular algae) under sterile conditions, are described. Bleaching and lysis of the cells could be prevented by controlling the pH and CO2... -
THE DETERMINATION OF CHLOROPHYLL
a IN WATER CONTAINING SEDIMENTItem type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.C. Grobler --- Department of Water Affairs, South Africa Elizabeth Davies --- Department of Water Affairs, South AfricaThe presence of sediment at concentrations of 0,2% by mass in water samples significantly lowered the amount of chlorophyll a that could be measured. Two types of sediment differed in their ability to lower the chlorophyll a concentration. The chemically... -
A LIMNOLOGICAL INVESTIGATION OF LAKE LIAMBEZI, CAPRIVI
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: M.T. Seaman --- , South Africa W.E. Scott --- , South Africa R.D. Walmsley --- , South Africa B. C.W. van der Waal --- , South Africa D.F. Toerien --- , South AfricaA general investigation was carried out on Lake Liambezi to characterize the limnological features of the lake. The lake, 101 km2 in area and situated within the tropics, was found to be shallow and bordered by reed swamps, particularly on... -
A CONCEPTUAL MODEL OF A SILTATION SYSTEM IN SHALLOW LAKES WITH LITTORAL VEGETATION
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P.J. Weisser --- Facultad de Ciencias,In shallow lakes a siltation system develops when wind driven water turbulence erodes the lake floor, silt is resuspended and transported by means of waterdrift into the littoral vegetation. Here, due to the resistance of the vegetation, the turbulence is... -
VIABLE HETEROTROPHIC BACTERIAL POPULATION STRUCTURE OF A TURBID MAN-MADE IMPOUNDMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.F. Toerien --- , Republic of South Africa D.N. Sadie --- , Republic of South Africa H. J.J. van Vuuren --- Department of Microbiology, Republic of South Africa R.P. Tracey --- Department of Microbiology, Republic of South AfricaSeventy one heterotrophic bacterial isolates were obtained from Wuras Dam, phenotypically characterized and clustered with the unweighted-pair group method. Three groups were obtained of which the first contained 59 members in several clusters. Overall this group was characterized by a... -
THE OCCURRENCE OF MICROCYSTIS AERUGINOSA IN THE BOTTOM SEDIMENTS OF A SHALLOW EUTROPHIC PAN
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: M. Tow --- Department of Botany and Microbiology, South AfricaSediment samples, collected from Jan Smuts Park Dam in Brakpan, Transvaal, during winter months were incubated in culture medium in the laboratory and found to contain viable Microcystis aeruginosa Kütz. emend. Elenkin colonies. The results obtained, indicate that the alga... -
CHEMICAL CHANGES IN THE GROWTH MEDIUM OF MICROCYSTIS, BATCH CULTURES GROWN AT STRESS AND NON-STRESS LIGHT INTENSITIES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: G H J Krüger --- Botany Department, South Africa JN Eloff --- Botany Department, South AfricaThe modified BG 11 growth medium used in this study has a poor buffer ability and large pH changes occurred during growth of Microcystis. Inhibition of growth in cultures grown at stress light intensity (26 μEinst m−2 sec−1) could be... -
SOME ASPECTS OF THE DISTRIBUTION OF REACTIVE PHOSPHORUS IN LAKE McILWAINE, RHODESIA: PHOSPHORUS LOADING AND SEASONAL RESPONSES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.A. Thornton --- Hydrobiology Research Unit,Between November 1976 and September 1977, samples were taken on a fortnightly basis from a representative station in Lake McIlwaine. In addition an intensive study of the riverine input of reactive phosphorus was conducted. Samples were analysed for total reactive... -
HYDROCHEMISTRY OF THE UPPER ORANGE RIVER CATCHMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: PC Keulder --- Department of Botany, South AfricaA four year pre-impoundment study of the catchment of the Hendrik Verwoerd Dam was conducted. The Orange River was the major source of dissolved chemicals and suspended sediments, while the Caledon River contributed 24 and 30% respectively, and the Kraai... -
A PRELIMINARY LIMNOLOGICAL STUDY OF BUFFELSPOORT DAM AND ITS CATCHMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R.D. Walmsley --- , D.F. Toerien --- ,A limnological survey of the Buffelspoort Dam and its catchment between 1973 and 1975 showed that the water of the area contained extremely low concentrations of dissolved minerals and that there was no point source of nutrient supply to the... -
THE INTERRELATIONSHIPS BETWEEN THE BIOLOGICAL AND PHYSICO-CHEMICAL PARAMETERS IN THE WATER PHASE OF SESHEGO DAM, NORTHERN TRANSVAAL
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Antoinette Jooste --- Department of Zoology and Biology, South AfricaSeshego Dam, Lebowa, was investigated over a period of 15 months (1974 – 1975). The interrelationships between biological parameters such as Biological Growth Potential (BGP), anaerobic fecal and coliform bacteria, Cladocera and Copepoda were established by means of factor and... -
SOME ASPECTS OF THE DISTRIBUTION OF REACTIVE PHOSPHORUS IN LAKE McILWAINE, RHODESIA: PHOSPHORUS LOADING AND ABIOTIC RESPONSES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.A. Thornton --- Hydrobiology Research Unit, Zimbabwe-RhodesiaThis study was designed to investigate the apparent loss from the water column in Lake McIlwaine This study of significant quantities of reactive phosphorus. The Total Reactive Phosphorus mass-balance for the lake for 1977/78 was calculated, and both in situ... -
EFFECT OF PHOSPHATE CONCENTRATION ON THE FINE STRUCTURE OF THE CYANOBACTERIUM, MICROCYSTIS AERUGINOSA KÜTZ. EMEND. ELENKIN
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: DerylJ. Barlow --- , South Africa W. L.J. van Rensburl --- , South Africa A. J.H. Pieterse --- , South Africa J.N. Eloff --- , South AfricaMicrocystis aeruginosa toxic strain UV-006 stored a fixed amount of polyphosphate in spherical granules located in the centroplasm. Twenty four hours of phosphate starvation induced use of stored polyphosphate, manifested by reduction in granule numbers. Reintroduction of 2, 4 or... -
HETEROTROPHIC UTILIZATION OF ACETATE AND GLUCOSE IN SWARTVLEI, SOUTH AFRICA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: RichardD. Robarts --- , South AfricaThe utilization of dissolved organic compounds in Swartvlei was measured by the addition of single concentrations of 14C-labelled acetate and glucose to water samples, The results indicated acetate uptake was greatest in the aerobic zone while glucose was predominantly utilized... -
THE DISTRIBUTION AND ECOLOGY OF TWO MULLET SPECIES IN SOME FRESH WATER RIVERS IN THE EASTERN CAPE, SOUTH AFRICA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: A.H. Bok --- Department of Nature and Environmental Conservation, South AfricaData on the relative abundance, penetration and breeding biology of the freshwater mullet Mugil cephalus and the flathead mullet Mugil cephalus in the freshwater reaches of some Eastern Cape coastal rivers are described. The differences found between the two species... -
AN EXPERIMENTAL EVALUATION OF THE INFLUENCE OF TEMPERATURE ON THE NATURAL RATE OF INCREASE OF DAPHNIA PULEX DE GEER
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.G. van As --- Department of Zoology, South Africa C. Comhrinck --- Department of Zoology, South Africa A.J. Reinecke --- Department of Zoology, South AfricaCohorts of Daphnia pulex from Boskop Dam, an irrigation reservoir near Potchefstroom, Transvaal, were kept at natural food levels under constant temperatures of 10, 15 and 20°C as well as under conditions of temperature with a diurnal fluctuation varying between... -
ZOOPLANKTON AND ENVIRONMENTAL CONDITIONS IN GROENVLEI, SOUTHERN CAPE, DURING 1976
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.J. Coetzee --- Cape Department of Nature and Environmental Conservation, South AfricaThe zooplankton and environmental conditions in Groenvlei were studied during 1976 as part of an overall ecological study of the zooplankton of the Wilderness Lakes system. The Groenvlei water was found to be well mixed and low in dissolved PO4−P,... -
LIMNOLOGICAL MODELLING: SIMULATION OF VERTICAL PROFILES OF TEMPERATURE, DISSOLVED OXYGEN AND NUTRIENTS. I. THEORY
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B. Henderson-Sellers --- Department of Civil Engineering, United KingdomIn a body of water, variations occur in all limnological parameters on many time and space scales. Modelling can either be specific - for a selected subset; or can attempt to simulate the gross characteristics of e.g. current, temperature, algal... -
WATER TRANSPARENCY CHARACTERISTICS OF SOUTH AFRICAN IMPOUNDMENTS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R.D. Walmsley --- , South Africa C.A. Bruwer --- , South AfricaSome water transparency characteristics (Secchi disc transparency, mean diffuse light attenuation coefficient and turbidity) of a number of South African impoundments are compared. In general most impoundments may be considered to be highly turbid; for 92 impoundments considered in this... -
AQUATIC MACROPHYTE COMMUNITIES OF THE WILDERNESS LAKES: COMMUNITY STRUCTURE AND ASSOCIATED ENVIRONMENTAL CONDITIONS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Clive Howard-Williams --- , South AfricaThe structure and summer biomass (g m−2 dry mass) of the principal aquatic macrophyte communities of the Wilderness Lakes were measured. Both emergent and submerged communities were included in the study. Productivity estimates were made by multiplying biomass by production/biomass... -
THE PLASMA PROTEINS OF SOME FRESHWATER FISH IN THEIR NATURAL ENVIRONMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J. H.J. van Vuren --- Division of Nature Conservation, South AfricaThe plasma proteins of Cyprinus carpio (carp), Barbus holubi (yellowfish), Labeo umbratus (mudfish) and Labeo capensis (mudfish) were electrophoretically separated on polyacrylamide gels from blood samples obtained from specimens sampled during summer and winter in three different localities. Within a... -
EFFECT OF CATTLE DIP CONTAINING TOXAPHENE ON THE FAUNA OF A SOUTH AFRICAN RIVER
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P.M. Brooks --- , South Africa B.D. Gardner --- , South AfricaIn August 1978 the Hluhluwe River, which runs through the Hluhluwe Game Reserve (Natal, South Africa), was polluted by toxaphene from a cattle dip tank. Faunal surveys were conducted to determine the impact of the insecticide on the fish and... -
ZOOPLANKTON BIOMASS OF SOME TRANSVAAL IMPOUNDMENTS AND ITS RELATIONSHIP TO TROPHIC STATUS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: M.T. Seaman --- , South Africa R.D. Walmsley --- , South Africa C.J. Alexander --- , South AfricaThe zooplankton biomass characteristics of 11 South African impoundments were investigated to assess the value of zooplankton biomass as a trophic status index. Mean annual zooplankton biomasses ranged from 0,38 to 5,32 g m−2, compared with the mean annual chlorophyll... -
OBSERVATTVNS ON THE UNDERWATER LIGHT FIELD OF TWO HWERTROPHIC, SOUTH AFRICAN IMPOUNDMENTS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R.D. Robarts --- , South Africa T. Zohary --- , South Africa F. Ojeda --- , Chile C. C.E. Lovengreen --- , Chile R.D. Walmsley --- ,The spectral composition of the underwater light field was examined in two hypertrophic South African Impoundments (Hartbeespoort and Roodeplaat Dams) under a range of inorganic turbidities and chlorophyll α concentrations. The data indicated that inorganic turbidity and gilvin were dominant... -
REDESCRIPTIONS OF PLACOBDELLA STUHLMANNI (BLANCHARD, 1897) AND PLACOBDELLA GAROUI (HARDING, 1932) (HIRUDINEA: GLOSSIPHONIIDAE)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.H. Oosthuizen --- Department of Zoology, South AfricaThe two African leeches Placobdella stuhlmanni (Blanchard, 1897) and Placobdella garoui (Harding, 1932) are redescribed and figured because of the confusion that exists in the literature with regard to the specific identities of the two taxa. During a survey of... -
LEAF AREA AS A MEASURE OF STANDING CROP OF FLOATING AQUATIC MACROPHYTES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P.C. Keulder --- Department of Botany, South AfricaLeaf area is evaluated as a measure of standing crop of Salvinia molesta Mitchell and Azolla filiculoides Lam. cultures under controlled conditions. Growth rates as derived from leaf area determinations agreed with pigment extractions and fresh and dry weight measures... -
STUDIES ON THE ZOOBENTHOS OF SOME SOUTHERN CAPE COASTAL LAKES. SPATIAL AND TEMPORAL CHANGES IN THE BENTHOS OF SWARTVLEI, SOUTH AFRICA, IN RELATION TO CHANGES IN THE SUBMERGED LITTORAL MACROPHYTE COMMUNITY
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.R. Davies --- , South AfricaMajor changes in the benthic macro-invertebrate community of the littoral zone of Swartvlei, South Africa, took place between January and April 1978, and the equivalent months of 1980. These changes, which were associated with a collapse of the submerged littoral... -
PHOSPHORUS DYNAMICS IN THE MONIMOLIMNION OF SWARTVLEI
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: M.J. Silberbauer --- , South AfricaThe exchange of phosphorus between the bottom sediment and monimolimnion of Swartvlei, a meromictic, humic lake, was investigated during the last three months of 1980. The concentrations of oxygen, dissolved salts, phosphorus and Fe++ in the water column were monitored,... -
TOXIN EXTRACTION FROM THE BLUE-GREEN ALGA MICROCYSTIS AERUGINOSA BY DIFFERENT EXTRACTION MEDIA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: A.J. van der Westhuizen --- Department of Botany, South Africa J.N. Eloff --- Department of Botany, South AfricaThe extractability of toxin from Microcystis aeruginosa isolate UV-006 by different extraction media such as O, 1N HC1, 2N CH3COOH, Triton X-100 and water at different pH levels was investigated. The best recovery of toxin was achieved with water at... -
ZOOPLANKTON AND ENVIRONMENTAL CONDITIONS IN A SOUTHERN CAPE COASTAL LAKE SYSTEM
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.J. Coetzee --- Cape Department of Nature and Environmental Conservation, South AfricaThe usually natural closing and artificial opening of the Tow River mouth to the sea have a major influence on the physico-chemical environmental conditions in the coastal lake system formed by the Tow River, Eilandvlei, Langvlei and Rondevlei, as it... -
TOXIC CONCENTRATION OF FREE AMMONIA TO BRACHIONUS CALYCIFLORUS PALLAS, A ROTIFER PEST SPECIES FOUND IN HIGH RATE ALGAL PONDS (HRAP's)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: IreneJ. de Moor --- National Institute for Water Research, Republic of South AfricaLaboratory tests on Brachionus calyciflorus Pallas indicate that at low concentrations of free ammonia (< 7 mg l −1) pH levels up to 9,85 could be tolerated for 96 h without apparent ill effect. Free ammonia concentrations > 14,4 mg... -
A PRELIMINARY ASSESSMENT OF THE IMPACT OF SOME ASPECTS OF THE HARTBEESPOORT DAM ENVIRONMENT ON PRODUCTION OF THE MAJOR FISH SPECIES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K.L. Cochrane --- , South AfricaThe dominant species of fish in Hartbeespoort Dam, in terms of mass composition of catches, are shown to be Oreochromis mossambicus (Peters), Cyprinus carpio Linnaeus and Clarias gariepinus Burchell. Minimum winter temperatures are demonstrated to have a major impact on... -
HYDROCLIMATE DEVELOPMENT FOLLOWING IMPOUNDMENT IN A TROPICAL AFRICAN MAN-MADE LAKE (LAKE ROBERTSON, ZIMBABWE)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: N.G. Cotterill --- Hydrobiology Research Unit, Zimbabwe J.A. Thornton --- Hydrobiology Research Unit, ZimbabweLake Robertson was impounded by the Darwendale Dam which was completed in late 1976 to supplement the water supply to the City of Harare, Zimbabwe. This paper presents the results of a fortnightly sampling programme conducted on the lake between... -
AN ASSESSMENT OF A RAPID AND CONVENIENT SPECTROPHOTOMETRY ADAPTATION OF THE WINKLER PROCEDURE FOR THE DETERMINATION OF DISSOLVED OXYGEN IN FRESH WATERS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P.J. Ashton --- National Institute for Water Research, South Africa A.J. Twinch --- National Institute for Water Research, South AfricaThe use of a spectrophotometric adaptation of the standard Winkler procedure to measure the dissolved oxygen content of water samples is described and assessed. The technique allows the rapid processing of routine samples and the accuracy, precision and sensitivity of... -
THE EFFECT OF CONSTANT TEMPERATURES ON THE HATCHING OF EGGS AND SURVIVAL OF THE FRESHWATER SNAIL BIOMPHALARIA GLABRATA (SAY)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P.H. Joubert --- South African Medical Research Council and Department of Zoology, South Africa S.J. Pretorius --- South African Medical Research Council and Department of Zoology, South AfricaThe incubation period and percentage hatching of eggs of pigmented and unpigmented Biomphalaria glabrata at constant temperatures were investigated in the range 14 °C to 34 °C. In order to determine the influence of extreme temperatures on adult snails, specimens... -
OBSERVATIONS ON THE UNDERWATER LIGHT FIELD OF TWO HYPERTROPHIC SOUTH AFRICAN IMPOUNDMENTS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R.D. Robarts --- National Institute for Water Research, South Africa T. Zohary --- National Institute for Water Research, South Africa F. Ojeda --- Institute of Physics, Chile C. C.E. Lovengreen --- Institute of Physics, Chile R.D. Walmsley --- Foundation for Research and Development,The spectral composition of the underwater light field was examined in two hypertrophic South African impoundments (Hartbeespoort and Roodeplaat Dams) under a range of inorganic turbidities and chlorophyll a concentrations. The data indicated that inorganic turbidity and gilvin were dominant... -
DISSEMINATION OF AQUATIC INVERTEBRATES ON WINDBLOWN VEGETATION MATS IN LAKE CHILWA, MALAWI
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: M.A. Cantrell --- Lake Chilwa Co-ordinated Research Project, MalaŵiExceptionally high water levels in Lake Chilwa, Malaŵi, resulted in large tracts of the swamp vegetation becoming detached from the periphery of the lake. The open water became littered with large rafts of the bulrush, Typha domingeneis together with other... -
THE EFFECTS OF DESIGN AND OPERATION ON THE EFFICIENCY OF HOSEPIPES AS WATER COLUMN SAMPLERS FOR PHYTOPLANKTON
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Tamar Zohary --- , South Africa P.J. Ashton --- , South AfricaThe efficiency of 5 different hosepipe samplers in providing representative water column samples was tested by comparing the chlorophyll a concentrations in these samples with those obtained by integrating discrete depth samples collected with a Van Dorn sampler, in two... -
A NOTE ON TRIOPS GRANARIVS (LUCAS), LYNCEUS TRUNCATUS BARNARD AND STREPTOCEPHALUS CAFER (LOVéN) (BRANCHIOPODA: CRUSTACEA) FROM UMFOLOZI GAME RESERVE, NATAL, SOUTH AFRICA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: NancyA. Rayner --- Department of Zoology, South Africa A.E. Bowland --- Department of Zoology, South AfricaThree species of branchiopod (phyllopod) Crustacea were collected from an ephemeral pool in Umfolozi Game Reserve in December 1983 and 1984. There is no published record of the occurrence of Triope granarius (Lucas) and Lynceus truncatus Barnard in Natal. Streptocephalus... -
EFFECT OF CONSTANT TEMPERATURE ON POPULATION DYNAMICS OF BULINUS TROPICUS (KRAUSS) AND LYMNAEA NATALENSIS KRAUSS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K.N. de Kock --- Snail Research Unit of the South African Medical Resesrch Council, South Africa J.A. van Eeden --- Snail Research Unit of the South African Medical Resesrch Council, South AfricaLife-tables were compiled for cohorts of the two freshwater snail species Bulinus tropicus (Krauss) and Lymnaea natalensis Krauss at six different constant temperatures from 17 to 32 °C under identical conditions of crowding, feeding and chemical composition of the water... -
NITROGEN TRANFORMATIONS AND THE NITROGEN BUDGET OF A HYPERTROPHIC IMPOUNDMENT (HARTBEESPOORT DAM, SOUTH AFRICA)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P.J. Ashton --- , South AfricaThe major components of the nitrogen balance of hypertrophic Hartbeespoort Dam were studied at weekly intervals from October 1980 to September 1984. The Crocodile River contributed over 80Z of the hydraulic load and over 97X of the annual total nitrogen... -
NUTRIENTS IN AQUATIC ECOSYSTEMS: AN INTRODUCTION TO SIMILARITIES BETWEEN FRESHWATER AND MARINE ECOSYSTEMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P Chapman --- , South Africa JA Thornton --- , South Africa -
NUTRIENTS IN AFRICAN LAKE ECOSYSTEMS: DO WE KNOW ALL?
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.A. Thornton --- , South AfricaIt is nearly sixty years since the first studies were undertaken on the nutrient chemistry of African lakes. There have been numerous studies on the chemical composition of African waters in the intervening years. Yet as recently as five years... -
NUTRIENT CYCLING IN MARINE ECOSYSTEMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P. Chapman --- , South AfricaThe overall cycles of nitrogen, phosphorus and silicon in the sea are described and compared. Data on the fluxes and rates of change between various pools of each nutrient are given, where available, and gaps in knowledge are pointed out... -
DECOMPOSITION IN PELAGIC MARINE ECOSYSTEMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: M.I. Lucas --- Zoology Department, South AfricaDuring the decomposition of plant detritus, complex microbial successions develop which are dominated in the early stages by a number of distinct bacterial morphotypes. The microheterotrophic community rapidly becomes heterogenous and may include cyanobacteria, fungi, yeasts and bactivorous protozoans. -
CHLOROPHYLL-a CONCENTRATION IN THE LOWER KAFUE RIVER AND CHONGWE RIVER BASINS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Petr Obrdlik --- , Federal Republic of GermanyThe concentration of chlorophyll a was measured in the warm monomictic impoundment, Itezhi-tezhi Lake ([xbar] = 2,00 mg m−3); in the small, slightly polluted Chongwe Dam ([xbar] = 11,0 mg m−3); and in the temporary Mungasiya River ([xbar] = 53,4... -
ZOOPLANKTON AND ESTUARINE RELICT (BENTHIC) FAUNA IN LAKE MZINGAZI, A FRESHWATER COASTAL LAKE OF NATAL
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.K. Fowles --- , South Africa C. G.M. Archibald --- , South AfricaLake Mzingazi, a natural, undisturbed freshwater coastal lake in the heart of the Richards Bay municipal area, is threatened by rapid urban and industrial growth. The previously unrecorded composition and distribution of zooplankton in the lake was studied during 1979... -
COUNTING NATURAL POPULATIONS OF MICROCYSTIS AERUGINOSA: A SIMPLE METHOD FOR COLONY DISRUPTION INTO SINGLE CELLS AND ITS EFFECT ON CELL COUNTS OF OTHER SPECIES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Tamar Zohary --- , Arcangela M. Pais Madeira --- ,A rapid, high-speed blending method for disrupting colonies of the cyanobacterium Microcystis aeruginosa to single cells in preparation for cell counts is described. Cell counts obtained for treated samples of natural populations of M. aeruginosa from Hartbeespoort Dam did not... -
DEVELOPMENT AND USE OF ZOOPLANKTON LENGTH - FILTRATION RATE RELATIONSHIPS FOR ESTIMATING PHYTOPLANKTON GRAZING LOSSES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: AndrewC. Jarvis --- ,Water quality is impaired by high chlorophyll concentrations. Limitation of algal stocks by high zooplankton grazing is an important component in many lake ecosystems and models. Measurement of grazing rates is labour intensive, expensive and requires specialized skills. This paper... -
THE USE OF TROFIC AS AN AID FOR THE MANAGEMENT OF EUTROPHIC LAKES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K. Clarke --- , A.C. Jarvis --- , P.J. Ashton --- , T. Zohary --- ,As a result of eutrophication studies that have been performed by the National Institute for Water Research for many years it was decided in 1980 that a detailed investigation into this area take place. Hypertrophic Hartbeespoort Dam was selected as... -
APPLICATION OF LAVSOE, AN EUTROPHICATION MODEL, TO BLOEMHOF DAM
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.N. Rossouw --- ,In 1985 the Department of Water Affairs introduced an effluent phosphate standard of 1 mg l−1 (as P) in seven potentially sensitive catchments. Although this is an uniform standard, permits can be granted for effluents to exceed the standard in... -
FUTURE CHALLENGES IN WATER QUALITY MODELLING WITH PARTICULAR REFERENCE TO OPERATIONALLY CLOSED CATCHMENTS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: S.F. Forster --- Department of Water Affairs, South Africa F.A. Stoffberg --- Department of Water Affairs, South Africa J.A. van Rooyen --- Department of Water Affairs, South AfricaAs a result of the declining quality of many water sources, the use of water quality models in planning is increasing. To date applications have involved the simulation of total dissolved salts and nutrients, largely in catchments affected by urban... -
ASPECTS OF EUTROPHICATION MANAGEMENT IN TROPICAL/SUB-TROPICAL REGIONS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.A. Thornton --- , South AfricaIn 1981, the UNESCO in association with the IIASA and OECD recognized that tropical/-sub-tropical water bodies may respond differently to eutrophication management techniques than heretofore expected on the basis of temperate lake studies. However, little information on the eutrophication process... -
TURBIDITY AND OTHER PHYSICAL FACTORS IN NATAL ESTUARINE SYSTEMS PART 1: SELECTED ESTUARIES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.P. Cyrus --- Department of Zoology, South AfricaData on turbidity and the factors influencing it, such as wind and substratum, were collected from eight representative estuaries along the Natal Coast. The results showed that Natal Estuaries can be divided into one of four groups, according to the... -
TURBIDITY AND OTHER PHYSICAL FACTORS IN NATAL ESTUARINE SYSTEMS PART 2: ESTUARINE LAKES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.P. Cyrus --- Department of Zoology, South AfricaData on turbidity, temperature and salinity and the factors which affect them, such as wind and substratum, were collected from Natal's two estuarine Lakes. The effects of wind and substratum, were collected from Natal's two estuarine Lakes. The effects of... -
ECOLOGICAL PROBLEMS IN HARTBEESPOORT DAM
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: AndrewC. Jarvis --- National Institute for Water Research,In Hartbeespoort Dam ecological problems arise primarily as a consequence of the reservoir's hypertrophic condition. The development of anaerobic conditions, high primary productivity and blue-green algal dominance have many detrimental influences on ecosystem structure and function. With high rates of... -
INTER- AND INTRA-SPECIFIC ASSOCIATIONS AS SOME POSSIBLE PREDATOR AVOIDANCE AND ENERGY CONSERVATION STRATEGIES IN PLANKTONIC ROTIFERS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J. Heeg --- Department of Zoology & Entomology, South Africa NancyA. Rayner --- Department of Zoology & Entomology, South AfricaDuring routine analysis of zooplankton samples from Lake Midmar, a warm temperate impoundment, several associations involving rotifer species were observed. These included: 1) the linking together of individuals of Hexarthra mira and Trichocerca chattoni to form chains; 2) phoretic associations... -
DISTRIBUTION AND ABUNDANCE OF THE BENTHOS IN THE SEDIMENTS OF LAKE CUBHU: A FRESHWATER COASTAL LAKE IN ZULULAND SOUTH AFRICA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.P. Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South Africa T.J. Martin --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaA preliminary investigation of the macrobenthic invertebrates of the sediments of Lake Cubhu, a freshwater coastal lake near Richards Bay was conducted on a quarterly basis during 1987. The most important factor which determined the abundance and distribution of each... -
AN EVALUATION OF BABY FISH FOOD AS A SUITABLE DIET FOR THE FRESHWATER SNAIL, BIOMPHALABIA GLABRATA (SAY)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P.H. Joubert --- Research Institute for Diseases in a Tropical Environment, South Africa K.N. de Kock --- Research Institute for Diseases in a Tropical Environment, South AfricaTetra Kin Baby Fish Food ‘E’ for Egglayers (Tetra ‘E’) was evaluated as a possible nutrient for the laboratory culture and maintenance of pigmented and unpigmented Biomphalaria glabrata (Say). Growth was monitored weekly by determining shell diameter and mass. The... -
TWENTY-FIVE YEARS OF TRICHOPTERA RESEARCH RELATING TO SOUTHERN AFRICA - A PERSONAL VIEW
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K. M.F. Scott --- , South AfricaA brief account of earlier work on Trichoptera, reasons for choice of the Order, and resources built up, is followed by the story of twenty-five years of research, from 1963–1988. This includes aims in view, followed by the ‘state of... -
Pitfalls in the Presentation of Chemical Data
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: J.A. Day --- Zoology Dept, South AfricaBiologists in the aquatic sciences are often guilty of numerous errors in the presentation of their chemical data. This paper reviews the use of units in the representation of the inorganic constituents of aquatic solutions for their benefit. It explains... -
Aerial and Aquatic Respiration in the River Crab Potamonautes Warreni Calman with Notes on Gill Structure
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: W.J. van Aardt --- Department of Zoology, South AfricaThe oxygen consumption rate (ṀO2) for Potamonauteus warreni Calman (= Potamon warreni (Calman) kept in 25 °C water was 34,4 μmol 1−1 O2 kg−1 and after 72 hours in 98% R.H. air the rate was 31,9 μmol 1−1 O2 kg−1... -
Covariance Analysis of Chlorophyll Distribution in the Sundays River Estuary, Eastern Cape
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: T. Hilmer --- Department of Botany, South Africa G.C. Bate --- Department of Botany, South AfricaAn analysis of covariance performed on chlorophyll a distribution data from the Sundays River estuary identified five persistent water masses with significantly different chlorophyll a contents. These corresponded to different hydrodynamic regions within the estuary. The relationship between salinity and... -
AN ASSESSMENT OF THE POTENTIAL IMPACT OF ALIEN INVASIVE VEGETATION ON THE GEOMORPHOLOGY OF RIVER CHANNELS IN SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: Kate Rowntree --- Department of Geography, South AfricaInvasion of the riparian zone by alien vegetation is recognised as a serious problem in many areas of South Africa. Vegetation is a dynamic component of river channels. It is an important control variable affecting channel form whereas the flow... -
THE DISTRIBUTION OF WETLANDS IN THE SOUTH-WESTERN CAPE PROVINCE, SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: M.J. Silberbauer --- Department of Water Affairs and Forestry, South Africa J.M. King --- Freshwater Research Unit, Zoology Department, South AfricaThe hydrological and habitat value of wetlands is beginning to be recognised in South Africa, but only in parts of Natal Province has an effort been made to map wetlands and to record their status over large areas. While the... -
MANAGEMENT OPTIONS FOR SHALLOW HYPERTROPHIC LAKES, WITH PARTICULAR REFERENCE TO ZEEKOEVLEI, CAPE TOWN
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: W.R. Harding --- , South Africa A. J.R. Quick --- , South AfricaZeekocvlei, a freshwater coastal lake, is an important regional recreation area in the south-western Cape, South Africa. The lake is hypertrophic, experiences perenially dense populations of cyanobacteria (Microcystis), invasive bulrush and reed encroachment, and has a thick benthic layer of... -
ASPECTS OF COMPARATIVE PLANKTON ECOLOGY IN CASCADING MGENI RIVER RESERVOIRS (MIDMAR, ALBERT FALLS, AND NAGLE): AN OVERVIEW
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R.C. Hart --- Department of Zoology & Entomology, South AfricaAn overview of a three year study of abundance, community structure and succession of zooplankton and phytoplankton in relation to physical limnological conditions in Lakes Midmar and Albert Falls is presented, along with findings on zooplankton from a nine month... -
SHORT-TERM IMPACTS OF FORMULATIONS OF BACILLUS THURINGIENSIS VAR. ISRAELENSIS DE BARJAC AND THE ORGANOPHOSPHATE TEMEPHOS, USED IN BLACKFLY (DIPTERA: SIMULIIDAE) CONTROL, ON RHEOPHILIC BENTHIC MACROINVERTEBRATES IN THE MIDDLE ORANGE RIVER, SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R.W. Palmer --- Department of Water Affairs and Forestry, South AfricaThe impacts of larvicides used in the control of blackflies (Diptera: Simuliidae) on macroinvertebrates in the stones-in-current biotope were assessed during 8 field trials in the middle Orange River, South Africa. Two Bacillus thuringiensis var. israelensis (B.t.i.) products (VectobacR 12AS... -
CHANGES IN URBAN RESIDENTIAL LAND IN THE RIETSPRUIT CATCHMENT, SOUTHERN TRANSVAAL
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: M.J. Silberbauer --- Department of Water Affairs, South Africa J. Moolman --- Department of Water Affairs, South AfricaInformal settlements have become an important and rapidly-expanding component of urban development in South Africa. In the Rietspruit catchment, south-west of Johannesburg, average growth rates in urban land cover of up to 2.7 km2 per year (1972–1991) were measured from... -
DETRIMENTAL EFFECTS OF FENTHION (QUELETOX® UL), USED TO CONTROL RED-BILLED QUELEA (QUELEA QUELEA), ON RHEOPHILIC BENTHIC MACROINVERTEBRATES IN THE ORANGE RIVER
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R.W. Palmer --- Department of Water Affairs and Forestry, South AfricaThe relative abundance of rheophilic macroinvertebrates in the Orange River was assessed before and 15 hrs after two aerial applications of fenthion (QUELETOX® UL) above roosting sites of the red-billed quelea (Quelea quelea). The first treatment had no detectable effect... -
A GEOMORPHOLOGICAL APPROACH TO THE IDENTIFICATION AND CLASSIFICATION OF INSTREAM FLOW ENVIRONMENTS
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R.A. Wadeson --- Department of Geography, South AfricaThis paper highlights the considerable confusion that exists within the ecological literature concerning the classification of the lotic (flowing water) environments. A large number of ill defined terms has been introduced by various authors; these often relate to better defined... -
CHANGES IN THE BENTHIC FAUNA OF LAKE CHIVERO, ZIMBABWE, OVER THIRTY YEARS
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: B.E. Marshall --- Department of Biological Sciences, ZimbabweLake Chivero is a eutrophic Zimbabwean reservoir and data on its benthic fauna are available over a period of about thirty years. The levels of organic carbon are higher than in many other southern African reservoirs but have not increased... -
IMPACTS OF REPEATED APPLICATIONS OF BACILLUS THURINGIENSIS VAR. ISRAELENSIS DE BARJAC AND TEMEPHOS, USED IN BLACKFLY (DIPTERA: SIMULIIDAE) CONTROL, ON MACROINVERTEBRATES IN THE MIDDLE ORANGE RIVER, SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R.W. Palmer --- Department of Water Affairs and Forestry, South Africa A.R. Palmer --- , South AfricaThe impacts of five consecutive treatments of blackfly larvicides on macroinvertebrates in the middle Orange River were assessed. The abundance of the midge Xenochironomus sp. and the limpet Burnupia sp. was lower at sites treated with Bacillus thuringiensis var. israelensis... -
A COMPARISON OF ALLOZYME HETEROZYGOSITY AND LIFE HISTORY VARIABLES IN FOUR STRAINS OF AFRICAN CATFISH (CLARIAS GARIEPINUS)
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: J. P. Grobler --- , , L. C. Hoffman --- , , South Africa J. F. Prinsloo --- , , South AfricaWe studied allozyme polymorphism and its relation to morphological characteristics in 122 individuals from four lines of African catfish. Starch gel electrophoresis was used to screen 26 loci, of which five were polymorphic. Average heterozygosity levels differed moderately among lines... -
MANAGING THE ST. LUCIA ESTUARY—MESSAGES FROM THE MUD
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R. K. Owen --- , , South Africa A. T. Forbes --- , , South AfricaThe infaunal macrobenthic community of the St Lucia estuary has been exposed to natural disturbance in the form of salinity fluctuations arising from floods and hypersaline conditions, and human-induced interference arising from dredging and beam trawling. The responses of the... -
FRESHWATER FISH OF THE ADDO ELEPHANT NATIONAL PARK
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: I. A. Russell --- , South AfricaThis study aimed to determine the distribution and relative abundance of freshwater fish in the Addo Elephant National Park. A total of 1578 fish specimens of 12 species were collected during surveys carried out in the Sundays River and four... -
A REVIEW OF THE MACROBENTHIC FAUNA OF THE MHLATHUZE ESTUARY: SETTING THE ECOLOGICAL RESERVE
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: C. F. Mackay --- , , South Africa D. P. Cyrus --- , , South AfricaThis paper reviews historical and current ecological information on macrobenthos from the Mhlathuze Estuary before and after development of the Richards Bay Harbour. The fauna is described in terms of the potential influence of a change in freshwater inflow to... -
Seasonal influence on diet selection of sheep grazing a weedy dryland lucerne pasture
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T.S. Brand F. Franck J. CoetzeeThe experiment was conducted to determine the seasonal effects on the availability, chemical composition and digestibility of a grazing dry-land lucerne pasture, as measured on samples either collected by hand or with oesophageally fistulated (OF) sheep. The pasture was monitored... -
The influence of tree density on the grass layer of three semi-arid savanna types of southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: CGF Richter HA Snyman GN SmitThe influence of bush density on the grass component of the herbaceous layer was investigated for three savanna veld types (Molopo Thornveld, Mixed Vaalbos Thornveld, and the Eastern Grass and Bushveld) in the Northern Cape and North-West Province of South... -
Predicting the extent of succulent thicket under current and future climate scenarios
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MP Robertson AR PalmerUsing data from the distribution records of the facultative CAM succulent shrub Portulacaria afra, and high resolution climate response surfaces, we developed a spatially explicit model of the potential distribution of the species in the Thicket Biome of the eastern... -
Preliminary results of a stocking rate trial in Lesotho
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: LM Mpiti-Shakhane GY Kanyama-Phiri WO Odenya JW BandaForage responses to stocking rates and seasons were determined over a one-year period. The experimental design consisted of three stocking rates namely, light (2.0ha LSU-1), moderate (1.25ha LSU-1) and heavy (0.5ha LSU-1) and four seasons (autumn, winter, spring and summer)... -
Response to elevated CO2 from a natural spring in a C4-dominated grassland depends on seasonal phenology
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SJE Wand GF Midgley WD StockA South African C4-dominated grassland was exposed to twice-ambient atmospheric CO2 concentration using gas emitted by a natural CO2 spring and distributed over a 7m x 7m plot. A similar control plot was established 20m away at near-ambient CO2 concentrations... -
Effect of plant height at cutting, source and level of fertiliser on yield and nutritional quality of Napier grass (Pennisetum purpureum (L.) Schumach.)
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T Zewdu RMT Baars A YamiNapier grass (Pennisetum purpureum (L.) Schumach.) was studied using a 5 x 3 factorial experiment arranged in a randomised complete block design with three replications. The treatments were five fertiliser applications (0kg ha-1 N, 46kg ha-1 N and 92kg ha-1... -
Grass composition and rangeland condition of the major grazing areas in the mid Rift Valley, Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Amsalu Sisay R M T BaarsA range inventory and condition study was conducted in three altitude zones: lowland (1500-1700m), medium altitude (1700-2000m), and highland (2000-2500m). Each altitude zone was stratified into four or five important grazing areas. One area represented lightly grazed government ranches or... -
Soil and vegetation changes across a Succulent Karoo grazing gradient
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P C Beukes F EllisThis study describes soil and vegetation changes radiating out from a central watering point on a livestock farm in the Succulent Ceres Karoo (Tanqua). The aim was to identify possible relationships between long-term grazing pressure, and soil and vegetation properties... -
Short-term response of burnt grassland to defoliation in a semi-arid climate of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: HA SnymanThe impact of defoliation on the productivity and soil temperature of burnt grassland (head and back fires) was investigated over the short term (one and two growing seasons after burning). Head fires had greater flame height and rate of spread... -
Using faecal profiling to assess the effects of different management types on diet quality in semi-arid savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: KR Mbatha D WardWe used faecal profiling to assess diet quality of animals under three different management types in a semi-arid savanna, northwest of Kimberley, Northern Cape, South Africa. The levels of faecal crude protein (FCP) and faecal phosphorus (FP) of free-ranging springbok... -
Determining spatial and temporal variability in quantity and quality of vegetation for estimating the predictable sustainable stocking rate in the semi-arid savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: KR Mbatha D WardThis study assessed the importance of spatial and temporal variation in plant quality and quantity for determining sustainable stocking rates in game, commercial and communal ranches in semi-arid savanna of the Northern Cape Province, South Africa, in wet and dry... -
Variation in nutritional composition and growth performance of some halophytic species grown under saline conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MY AshrafStudies were conducted at the Biosaline Research Station-II of the Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan to evaluate biomass production and nutritive value of some salt-tolerant grasses and bushes, i.e. Leptochloa fusca, Sporobolus arabicus (Poaceae), Suaeda fruticosa,... -
Do mammalian herbivores influence invertebrate communities via changes in the vegetation? Results from a preliminary survey in Kruger National Park, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Jonsson --- Department of Forest Ecology and Management, Sweden D Bell --- Department of Wildlife, Fish, and Environmental Studies, Sweden J Hjältén --- Department of Wildlife, Fish, and Environmental Studies, Sweden T Rooke --- Department of Wildlife, Fish, and Environmental Studies, Sweden PF Scogings --- Department of Agriculture, South AfricaWe investigated the indirect influence of mammalian herbivores on invertebrates, by utilising long-term mammalian herbivore exclosures in Kruger National Park. The exclosures span three distinct habitat types (crest, footslope and riparian) on a catena. By performing invertebrate collections in the... -
An evaluation of dryland legume and legume‐grass pastures based on lucerne and red clover, with sheep, using a put‐and‐take system in the outeniqua area of the Southern Cape
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.M. van Heerden --- Department of Agriculture, Republic of South Africa P.R. Botha --- Department of Agriculture, Republic of South AfricaThe production of a pure lucerne (Medicago sativa) pasture, two lucerne‐grass pastures and two red clover (Trifolium pratense)‐grass pastures was compared at two grazing pressures (3.5 and 4.0 kg DM per small stock unit d‐1) in the Outeniqua area, using... -
A comparison of pod and seed characteristics, nutritive value, digestibility and seed survival in cultivars from different Medicago species fed to sheep
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T.N. Kotzé --- Department of Agriculture, Republic of South Africa T.S. Brand --- Department of Agriculture, Republic of South Africa G.A. Agenbag --- Department of Agronomy and Pasture Science, Republic of South AfricaThis study was conducted to compare pod and seed characteristics, nutritive value, digestibility and seed survival of intact medic pods after ingestion by sheep. Different diets comprising the intact pods of six cultivars of the medic species that are most... -
Effect of different herbage preservation methods on the tannin levels monitored in Eulalia villosa Thunb. (Nees)
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: E.W. du Toit --- , Republic of South Africa M.M. Wolfson --- , Republic of South AfricaTannin concentrations in freeze‐, oven‐ and room‐temperature‐dried samples of leaves of Eulalia villosa Thunb. (Nees), as well as undried material stored at ‐70°C, were determined in order to compare the effect of different preservation methods on the tannin levels measured... -
Research note: Tests for inducible thorn defences against herbivory must consider plant growth strategies
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.J. Midgley --- Botany Department, Republic of South Africa D. Ward --- Mitrami Centre for Desert Ecology, Jacob Blaustein Institute for Desert Research, IsraelThorn length and density on the latest year's growth were compared at three height (feeding) levels (<1m, >1m<2 m and >2 m) on individuals of Acacia karroo and Ziziphus mucronata in an area that was browsed by goats. Thorn length... -
Review article: Vegetative growth, reproduction, browse production and response to tree clearing of woody plants in African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G.N. Smit --- Department of Grassland Science, Republic of South Africa N.F.G. Rethman --- Department of Plant Production and Soil Science, Republic of South Africa A. Moore --- Department of Agriculture, Republic of South AfricaThis review deals with issues including the determinants of vegetative growth of woody plants (soil water availability, water stress, soil nutrient availability, carbohydrate reserves, plant hormones, atmospheric CO2 concentration, tree age, competition, defoliation and shoot pruning, fire, pathogens, soil and... -
Rates of wood and dung disintegration in arid South African rangelands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S.J. Milton --- FitzPatrick Institute, Republic of Soutli Africa W.R.J. Dean --- FitzPatrick Institute, Republic of Soutli AfricaDead shrubs lying on the soil surface in an arid shrubland in the southern Karoo have half‐lives of 9 to 18 years depending on wood density which varies among species. Dung pellets of sheep and springbok can remain intact on... -
Factors influencing forage preference of bushbuck and boer goats for Subtropical Thicket plants
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S.L. Haschick --- Terrestrial Ecology Research Unit, Department of Zoology, Republic of South Africa G.I.H. Kerley --- Terrestrial Ecology Research Unit, Department of Zoology, Republic of South AfricaDietary preference of bushbuck (Tragelaphus scriptus) and boer goats (Capra hircus) was determined for sixteen Subtropical Thicket plant species using cafeteria style selection trials. Principal components analysis was used to identify major axes of variation in the chemical contents of... -
Research note: The silage characteristics of two varieties of forage sorghum mixed in different proportions and at two stages of maturity
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G. Ashbell --- Forage Preservation and By‐Products Research Unit, ARO, Israel Z.G. Weinberg --- Forage Preservation and By‐Products Research Unit, ARO, Israel K.K. Bolsen --- Department of Animal Sciences and Industry, United States Y. Hen --- Forage Preservation and By‐Products Research Unit, ARO, Israel A. Azrieli --- Forage Preservation and By‐Products Research Unit, ARO, IsraelTwo varieties of forage sorghum, low grain Dekalb FS‐5 (FS) and higher grain Pioneer 947 (GS) were harvested at the milk and dough stages of maturity respectively. Each variety was ensiled separately and as mixtures under laboratory conditions. The mixtures... -
Responses to sheep browsing at different stocking rates: Water relations, photosynthesis and carbon allocation in two semi‐arid shrubs
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: F. van der Heyden --- ARC ‐ Range and Forage Institute, c/o Department of Botany, Republic of South Africa F. Roux --- , Republic of South Africa C.N. Cupido --- Department of Plant Sciences, Republic of South Africa M.W.P. Leeuw --- Department of Plant Sciences, Republic of South Africa N. Malo --- Department of Plant Sciences, Republic of South AfricaThe ecophysiological responses of two karoo shrubs to sheep browsing at different stocking rates were studied. The responses of a relatively unpalatable shrub (Pteronia tricephala), and of a shrub of greater palatability (Eriocephalus ericoides) were examined at high, intermediate and... -
Antioxidant activity of selected plants of the Great Fish River Reserve,Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AH Kgopa --- Department of Biochemistry, Microbiology and Biotechnology, South Africa SI Bulani --- Department of Biochemistry, Microbiology and Biotechnology, South Africa BS Wilhelmi --- Department of Biochemistry, Microbiology and Biotechnology, South Africa JM Brand --- Department of Biochemistry, Microbiology and Biotechnology, South AfricaThe Great Fish River Reserve (GFRR), in the Eastern Cape, has proved to be particularly suitable for the black rhinoceros that have been introduced over the past 20 years. In captivity, these animals often suffer from a number of disease... -
Community dynamics and phytomass of herbaceous species in the Sudaniansavanna-woodlands of Burkina Faso: short-term impact of burning season
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SD Dayamba --- Tropical Silviculture and Seed Laboratory, Southern Swedish Forest Research Centre, Faculty of Forest Sciences, Sweden P Savadogo --- Tropical Silviculture and Seed Laboratory, Southern Swedish Forest Research Centre, Faculty of Forest Sciences, Sweden L Sawadogo --- Département Productions Forestières, Burkina Faso D Tiveau --- , République Démocratique du Congo D Zida --- Département Productions Forestières, Burkina Faso M Tigabu --- Tropical Silviculture and Seed Laboratory, Southern Swedish Forest Research Centre, Faculty of Forest Sciences, Sweden PC Oden --- Tropical Silviculture and Seed Laboratory, Southern Swedish Forest Research Centre, Faculty of Forest Sciences, SwedenFire is important for the maintenance and conservation of African savanna ecosystems, and prescribed fire is used in the Sudanian savanna-woodlands of West Africa as a forest management tool. Yet, the effects of fire on savanna ecosystems and especially on... -
Modelling the complex dynamics of vegetation, livestock and rainfall in asemiarid rangeland in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: FD Richardson --- Department of Mathematics and Applied Mathematics, South Africa MT Hoffman --- Plant Conservation Unit, Botany Department, South Africa L Gillson --- Plant Conservation Unit, Botany Department, South AfricaPredicting the effect of different management strategies on range condition is a challenge for farmers in highly variable environments. A model that explains how the relations between rainfall, livestock and vegetation composition vary over time and interact is needed. Rangeland... -
Landscape-level differences in fire regime between block and patch-mosaicburning strategies in Mkuzi Game Reserve, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: CM Mulqueeny --- , South Africa PS Goodman --- , South Africa TG O'Connor --- School of Animal, Plant and Environmental Sciences, South AfricaPatch-mosaic burning (PMB) is commonly advocated to create a mosaic of fire regimes that is believed to be more beneficial for maintaining biodiversity than the relatively homogeneous environment produced by block burning. This premise was examined for the 23 651... -
Intra-annual variation of arthropod-plant interactions and arthropod trophic structure in an endangered grassland in the Free State province, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: F Buschke --- Centre for Environmental Management, South Africa M Kemp --- Centre for Environmental Management, South Africa M Seaman --- Centre for Environmental Management, South Africa S Louw --- Department of Zoology and Entomology, South AfricaArthropods are valuable biological indicators owing to strong relationships with primary producers. The supposition that arthropod-plant interactions are constant over seasons was tested using Mantel tests on correlations between these groups. A total of 78 plant species and 108 arthropod... -
Tebuthiuron residues remain active in soil for at least eight years in a semi-arid grassland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JCO du Toit --- , South Africa KP Sekwadi --- , South AfricaThe non-selective, soil-applied herbicide tebuthiuron (1-(5-tert-butyl-1,3,4-thiadiazol-2-yl)-1,3-dimethylurea) is registered for the control of the indigenous encroacher shrub Seriphium plumosum (Asteraceae) in South Africa. The use of tebuthiuron on a farm in the Cymbopogon–Themeda veld type in the Zastron district of the... -
A novel method for estimating tree dimensions and calculating canopy volume using digital photography
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AS Barrett --- Applied Behavioural Ecology and Ecosystems Research Unit, South Africa LR Brown --- Applied Behavioural Ecology and Ecosystems Research Unit, South AfricaStudies on plant phenology and browse capacity require effective methods to rapidly quantify plant dimensions such as tree height, height of maximum canopy diameter, height of first leaves, maximum canopy diameter, and diameter of trunk(s) at height of first leaves... -
Occurrence of dark septate endophytes in Nothofagus seedlings from Patagonia, Argentina
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: María E Salgado Salomón --- , Argentina Carolina Barroetaveña --- , Argentina Mario Rajchenberg --- , ArgentinaTemperate forests of southern Argentina and Chile cover a wide latitudinal and altitudinal range on both sides of the Andes, with Nothofagus species being one of the main tree species. Most of the larger remnants are protected within the limits... -
In vitro organic matter disappearance of tanniferous browse using rumen liquid from goats ingesting grass versus browse
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Caroline C Wambui --- Egerton University, Kenya James P Muir --- Texas A&M AgriLife Research, USA John Githiori --- International Livestock Research Institute, Kenya Barry D Lambert --- Texas A&M AgriLife Research, USAIn vitro organic matter disappearance (IVOMD) of African browse species often indicates artificially low nutritive value due to the presence of condensed tannins (CT). Diet of the rumen liquor donor may change this if it contains CT. Leaves from 11... -
Post-wildfire regeneration of rangeland productivity and functionality – observations across three semi-arid vegetation types in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Johannes AD Breedt --- School of Biological Sciences, South Africa Niels Dreber --- School of Biological Sciences, South Africa Klaus Kellner --- School of Biological Sciences, South AfricaWildfires can have significant impacts on rangeland productivity and functionality causing substantial economic losses to affected farmers. In August 2011, such wildfires swept through the North West province of South Africa, destroying large areas of grazing and farm infrastructure. There... -
Themeda triandra: a keystone grass species
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Hennie A Snyman --- Animal, Wildlife and Grassland Sciences, South Africa Lachlan J Ingram --- Plant Breeding Institute, Faculty of Agriculture and Environment, Australia Kevin P Kirkman --- Grassland Science, South AfricaThemeda triandra is a perennial tussock grass endemic to Africa, Australia and Asia. Within these regions it is found across a broad range of climates, geological substrates and ecosystems. Because it is widespread across these areas it has great economic... -
Topographical units and soil types prove more efficient for vegetation sample site placement than Land Type units in semi-arid savanna, North West province, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francois Viljoen --- Department of Nature Conservation, South Africa Kerryn Bullock --- Department of Nature Conservation, South Africa Mike Panagos --- Department of Nature Conservation, South Africa Willem Myburgh --- Department of Nature Conservation, South AfricaLand Type mapping units were used to stratify the Heritage Park corridor, in the North West province, South Africa, into eight Land Type units prior to placing 109 floristic sample sites. At each site, species composition and relative frequency data... -
Influence of undersowing annual forage legumes in early-maturing maize on grain yield and quality of their forage mixtures
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Tunde A Amole --- Institute of Food Security, Environmental Resources and Agricultural Research, Nigeria Victoria Ojo --- Department of Pasture and Range Management, Nigeria Peter A Dele --- Department of Pasture and Range Management, Nigeria Oluwaseun Idowu --- Department of Pasture and Range Management, Nigeria Adewale Adeoye --- Department of Pasture and Range Management, NigeriaAn experiment was carried out to investigate the effects of date of undersowing different legume species on maize grain yield and forage quality. Early-maturing maize (Zea mays L. cv. Suwan1) and Tephrosia bracteolata Guill. and Perr. (tephrosia), Lablab purpureus (L.)... -
Soil characteristics under legume and non-legume tree canopies in signalgrass (Brachiaria decumbens) pastures
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jose CB Dubeux --- North Florida Research and Education Center, USA Mario de Andrade Lira --- Instituto Agronômico de Pernambuco (IPA), Brazil Mercia V Ferreira dos Santos --- Zootecnia, Brazil Jim Muir --- Borlaug Institute, South Africa Monica A da Silva --- Zootecnia, Brazil Vicente I Teixeira --- Zootecnia, Brazil Alexandre C Leão de Mello --- Zootecnia, BrazilTree canopies can change soil environments. Our study looked at soils 10%, 50%, 100% and 150% the distance from tree trunk to canopy edge of leguminous sabiá (Mimosa caesalpiniifolia Benth.) and espinheiro (Machaerium aculeatum Raddi) and non-legume cajueiro (Anacardium occidentale... -
The influence of tree thinning on the establishment of herbaceous plants in a semi-arid savanna of southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G.N. Smit F.G. RethmanThe investigation was conducted on an area covered by a dense stand of Colophospermum mopane. Seven plots (65 m × 180 m) were subjected to different intensities of tree thinning, ranging from a totaly cleared plot (0%) to plots thinned... -
Rate and pattern of bush encroachment in Eastern Cape savanna and grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T.G. O'Connor V.R.T. CrowThe rate and pattern of bush encroachment in the grasslands and savannas of the Kei Road-Komga region of the Eastern Cape were quantified by analysis of nine sets of aerial photographs taken between 1937 and 1986. Woody cover increased from... -
The effect of long-term mowing and ungulate exclusion on grass species composition and soil nutrient status on the Athi-Kapiti plains, central Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: D. Berliner J. KiokoThe long-term (>30 years) impacts of mowing (for hay-making) and ungulate exclusion, on natural, unfertilised rangelands were investigated. Changes in grass species composition and soil nutrient status were measured The study site, situated on the Athi-Kapiti plains of central Kenya,... -
The effect of harvesting operations, slash management and fertilisation on the growth of a Eucalyptus clonal hybrid on a sandy soil in Zululand, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: ColinW Smith Ben du ToitHarvesting operations during clearfelling and extraction of timber from commercial plantations result in many processes that may affect long-term site productivity such as soil compaction and residue manipulation. The objective of this work was to evaluate the effects of various... -
The present status of Anaphes nitens (Hymenoptera: Mymaridae), an egg parasitoid of the Eucalyptus snout beetle Gonipterus scutellatus, in the Western Cape Province of South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: G. D. TribeThe egg parasitoid Anaphes nitens (Girault) was successfully introduced into South Africa in 1926 to control the Eucalyptus snout beetle, Gonipterus scutellatus Gyllenhal. However, outbreaks of the beetle on the Highveld in the 1980s questioned the efficacy of the parasitoid... -
An assessment of factors affecting early survival and growth of Pinus patula and Pinus elliottii in the summer rainfall region of southern Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: C. A. Rolando K. M. LittleHigh initial mortality of pine seedlings planted in commercial timber plantations in the summer rainfall region of southern Africa has motivated research into possible causes. The objectives of this study were to assess whether survival and initial growth of Pinus... -
A survey of cossid moth attack in Eucalyptus nitens on the Mpumalanga Highveld of South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: G. R. BorehamDuring July 2004, an infestation of an unknown larval insect in ten-year and older Eucalyptus nitens was reported on the Mpumalanga highveld of South Africa. Samples of wood containing larvae were collected from the field and taken to the Forestry... -
Forest inventory in the digital remote sensing age
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Chr. Kätsch A. KunnekeApplications of sampling theory together with the technical developments in the field of remote sensing have opened new paths in forest inventory. This paper presents an overview of ongoing research in the field of automatic feature extraction and pattern recognition,... -
Effects of storage conditions on chlorophyll content in diploid black wattle (Acacia mearnsii)
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S. Mathura S. L. Beck A. FosseyBlack wattle (Acacia mearnsii de Wild) is a commercially important forestry species in South Africa, however, being an exotic it is also seen as an invader of indigenous vegetation. Research into producing a sterile variety is underway and one such... -
Long-Term Antelope Population Monitoring in Southern Cape Forests
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Armin H.W. Seydack --- Department of Water Affairs and Forestry, Republic of South Africa Johan Huisamen --- Department of Water Affairs and Forestry, Republic of South Africa Rynhard Kok --- Department of Water Affairs and Forestry, Republic of South AfricaThe results of population monitoring of two forest antelope species in the Knysna forests (South Africa), the bushbuck (Tragelaphus scriptus) and blue duiker (Philantomba monticola) are presented. Most monitoring was done by faecal pellet group counting, but some track counts,... -
Fourteen Year Performance of Eucalyptus Species/Provenances, Casuarina equisetifolia, Leucaena leucocephala and Senna siamea at Michafutene, Mozambique
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: A.G. Mugasha --- Department of Forest Biology, Faculty of Forestry, Tanzania P.A. Wate --- Centro de Experimentacao Florestal (CEF), S. A.O. Chamshama --- Department of Forest Biology, Faculty of Forestry, TanzaniaVariation in performance of several Eucalyptus species/provenances/land races, Casuarina equisetifolia, Leucaena leucocephala and Senna siamea was evaluated in two 14—year old trials planted at Michafutene, Mozambique. At the age of 6, 10, and 14 years, data were collected of survival,... -
Remote sensing from space—present and future applications in forestry, nature conservation and landscape management
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Christoph Kätsch --- Faculty of Forestry, Fachhochschule Hildesheim/Holzminden, Germany Holger Vogt --- Dipl. Forstwirt Holger Vogt, Faculty of Forestry, South AfricaPast studies have suggested that sound knowledge about the reflectance characteristics of objects could be of great value in understanding the physical, chemical, and the spatial properties of features on our planet. These characteristics can be assessed remotely, and the... -
Control of Eucalyptus grandis cut-stumps of single-stem origin
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: K.M. Little --- , Republic of South Africa N.S. Eccles --- , Republic of South AfricaFour methods to control coppice re-growth on single-stem cut-stump Eucalyptus grandis stools were tested in the Zululand region of KwaZulu-Natal. The methods used were the burning of the plantation residue as opposed to a no-burn control, the application of triclopyr... -
Species composition and phytogeographical significance of an afromontane forest fragment in the Mpumalanga province, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: T.L. Morgenthal --- , South Africa S.S. Cilliers --- , South AfricaA floristic survey of an afromontane forest fragment, Pedlar's Bush, was done as part of an effort to proclaim this forest as a national heritage site. A checklist of 245 plant taxa has been compiled for Pedlar's Bush. The phytogeographical... -
Experiences of Newly Married Black Women Staying with the Extended Family in a Township in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: N.B. Mashele --- Psychiatric Nursing, University of Johannesburg, South Africa M. Poggenpoel --- Psychiatric Nursing, University of Johannesburg, South Africa C.P.H. Myburgh --- Educational Sciences, University of Johannesburg, South AfricaWe report the results of a phenomenological study on the experiences of newly married black women staying with extended family in South African townships. Our goals for the study included in-depth interviews on experiences and guidelines to facilitate these women's... -
Still Photography Provides Data for Community-Based Initiatives
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Mohamed Seedat --- UNISA Institute for Social and Health Sciences, Loni Baadjies Ashley van Niekerk Thoko MdakaWe use community psychology's accent on methodological pluralism and giving voice to the marginalised as a platform to critically examine the utility and outcome of photography as a data collection and community engagement method. Accordingly we focus on two community... -
The Impact of Changes in the Work Environment on the Place-Identity of Academics: An Exploratory Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Puleng Segalo --- University of South Africa,The study examined the impact of changes in the work environment on the construction of place-identity among university academics. Data were collected from five academics at a large distance learning university in South Africa. The institution was undergoing major structural... -
Dimensions of Social Well-Being in a Motor Manufacturing Organisation in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Melanie de Jager --- University of South Africa, Sanet Coetzee --- University of South Africa, Deléne Visser --- University of South Africa,The study examined the psychometric properties of the 15-item version of the Social Well-being Scale (SWBS-15: Keyes, 1998) for a South African sample with diversity in culture. The SWBS-15 and a biographical questionnaire were administered to employees in a motor... -
In Pursuit of Happiness: How Some Young South African Children Construct Happiness
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Irma Eloff --- University of Pretoria,The purpose of the study was to explore the ways in which young South African children construct the notion of happiness. The small-scale study was conducted with children (n=42) in middle childhood between the ages of 6 and 13 years... -
Photovoice as a Methodological Tool to Address HIV and AIDS and Gender Violence amongst Girls on the Street in Rwanda
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jean-Paul Umurungi --- National University of Rwanda, Claudia Mitchell --- McGill University, Myriam Gervais --- McGill University, Eliane Ubalijoro --- McGill University, Violet Kabarenzi --- Rwanda National Police,This study involved a particular group of children in Rwanda—girls who are living on the street and who miss out on education. Noting their relative absence from “the picture” in relation to accesses to services, the study explored how participatory... -
Psychological Distress in Orphan, Vulnerable Children and Non-Vulnerable Children in High Prevalence HIV/AIDS Communities
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bev Killian --- University of KwaZulu-Natal, Kevin Durrheim --- University of KwaZulu-Natal,The degree of psychological distress and access social support is investigated in children (n = 741) living in nine high prevalence HIV/AIDS communities. They comprised (i) vulnerable, maternally-orphaned (n = 319); (ii) vulnerable and not orphaned (n = 276); and... -
Finding Voice: The Photovoice Method of Data Collection in HIV and AIDS-Related Research
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Suhana Jacobs --- University of KwaZulu-Natal, Anne Harley --- University of KwaZulu-Natal,This study examined the efficacy of photovoice as a research technique to explore the lives of children and families living in the context of HIV and AIDS. Participants were volunteers at a Day Care and Support Centre (n=18), and members... -
“It can save you if you just forget”: Closeness and Competence as Conditions for Coping among Ugandan Orphans
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Krister Westlye Fjermestad --- University of Bergen, Norway Ingrid Kvestad --- National Child Protection Services, Norway Marguerite Daniel --- University of Bergen, Norway Gro Th. Lie --- University of Bergen, NorwayThis article explores the coping strategies of orphaned children and their caregivers supported by a community-based organization in a Ugandan slum area. In-depth qualitative interviews were conducted with eight orphans (aged 12 to 16 years) and their caregivers selected by... -
Lived Experiences of Subclinical Eating Disorder: Female Students' Perceptions
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Doret K. Kirsten --- North-West University, Wynand F. du Plessis --- North-West University,The aim of this study was to obtain an “insiders' perspective” on the lived experience of Subclinical Eating Disorder (SED) in female university students. Participants were 30 white, undergraduate females from the Potchefstroom campus of the North-West University in South... -
A Parent's Experience of the Couple Relationship After Child Bereavement in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jeanette Maritz --- University of Johannesburg, Marie Poggenpoel --- University of Johannesburg, Chris Myburgh --- University of Johannesburg,The objective of this qualitative, exploratory, descriptive and contextual research was to explore and describe a parent's experience of the couple relationship after child bereavement in South Africa. Participants were nine parents as well as the researcher who lost children... -
A Comparison of Quality of Life in Haemodialysis and Peritoneal Dialysis Patients
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Priyesh Bipath --- University of Pretoria, Catherine Govender --- University of Pretoria, Margaretha Viljoen --- University of Pretoria,Decreased quality of life of end-stage renal disease is further compromised by renal function replacement treatments such as haemodialysis (HD) and peritoneal dialysis (PD). Poor quality of life negatively affects treatment outcome. This study compared quality of life between HD... -
Educators' Perceptions of Attention Deficit Hyperactivity Disorder: An Exploratory Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Anwynne Kern --- University of Witwatersrand, Joseph Seabi --- University of Witwatersrand,The study investigated the perceptions of educators about Attention Deficit Hyperactivity Disorder, specifically their views on its incidence, causes and appropriate interventions in school settings. Five purposively selected educators from a private school participated in the study. Ethnographic interview was... -
Child Abuse: The Experiences of Children of Divorced Parents
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Olaniyi Bojuwoye --- University of the Western Cape, Orok Akpan --- University of KwaZulu-Natal,The study investigated children's experiences of the divorce of their parents. The study specifically sought children's opinions as to their experiences of, and family circumstances associated with, the divorce of their parents. Data collection was by in-depth one-on-one individual interviews... -
Child Physical Abuse Among Urban Secondary School Pupils in Zimbabwe
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Pesanayi Gwirayi --- University of Fort Hare, South Africa Almon Shumba --- University of Fort Hare, South AfricaThe study had two main objectives: (a) to examine the nature and prevalence of child physical abuse among urban secondary school pupils in Zimbabwe; and (b) to investigate pupils' views on the causes of child physical abuse among urban secondary... -
Self-reported Diabetes Prevalence and Risk factors in South Africa: Results from the World Health Survey
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- Human Sciences Research Council, South AfricaUsing the data from the South African World Health Survey (WHS), the current study aims to assess the self-reported prevalence of diabetes and associated risk factors by socio-economic characteristics in South Africa. A population-based survey of 2314 participants (1116 men... -
Experience of Women after a Spontaneous Abortion
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Elsie Janse van Rensburg --- University of Pretoria, South Africa Marie Poggenpoel --- University of Johannesburg, South Africa Chris Myburgh --- University of Johannesburg, South Africa Diana Du Plessis --- University of Johannesburg, South AfricaThe objective of this research was to explore and describe the experience of women after a spontaneous abortion to facilitate the mental health of these women in future. The participants in this study were seven white South African (ages range... -
The Male Rape Survivor: Possible Meanings in the Context of Feminism and Patriarchy
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Gertie Pretorius --- University of Johannesburg, South AfricaThis article covers a philosophical investigation into the possible meanings of rape for male survivors. The legal definitions of rape are investigated and the impossibility of male rape—from a legal, personal and social angle—described. An analysis of male rape in... -
Offender Rehabilitation and Counselling Dynamics in the South African Correctional Environment: Systems and Prospects
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ann-Mari Elizabeth Hesselink --- University of South Africa, Friedo Johann Willem Herbig --- University of South Africa,This article provides a theoretical overview of the correctional reform as well as rehabilitative and counselling landscape within South African Correctional Centres. Key challenges being faced in this arena include corruption/collusion of correctional staff, poor and failing infrastructure, high staff... -
Cronbach's Alpha: Review of Limitations and Associated Recommendations
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Aaron A. Agbo --- University of Nigeria,This paper discusses the limitations of Cronbach's alpha as a sole index of reliability, showing how Cronbach's alpha is analytically handicapped to capture important measurement errors and scale dimensionality, and how it is not invariant under variations of scale length,... -
Educational Psychology Theory and the Promotion of Dental Care for Children Aged Five to Six
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Marilize Kitching --- North-West University, South Africa Vera Roos --- North-West University, South Africa Alida Nienaber --- North-West University, South AfricaThe aim of this article is to illustrate the value of educational psychology theory in developing an age-appropriate programme to prevent tooth decay. A theory-based approach was adopted for the programme development, and a questionnaire was used to ascertain the... -
Career-story Interviewing Using the Three Anecdotes Technique
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jacobus G. Maree --- University of Pretoria,This article describes the value of using the Three Anecdotes Technique (TAT) during career-story interviewing. The TAT is a technique aimed at eliciting clients' three earliest memories to help counsellors identify clients' preoccupations and thereby support them to deal with... -
Life Designing in 21st Century: Using a New, Strengthened Career Genogram
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Annamaria Di Fabio --- University of Florence, ItalyThis work proposes the use of a new, strengthened career genogram in a life designing paradigm for the 21st century. The article shows the importance of the new paradigm for career construction and self-constructing in life designing interventions. From this... -
The Lived Experiences of Sex Workers in South Africa: An Existential Phenomenological Exploration
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Gertie Pretorius --- University of Johannesburg, Dale Bricker --- University of Johannesburg,We explored the lived experiences of sex workers in South Africa by employing a phenomenological methodology. Five women between the ages of 34 and 48 years who were/are involved in this industry were interviewed between January and March 2008. Through... -
Influence of Socio-Demographic Factors on SRAVEN Performance
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Raegan Murphy --- University College Cork, Ireland Nafisa Cassimjee --- University of Pretoria, South Africa Clare Schur --- University of Pretoria, South AfricaThis exploratory study aimed to investigate the influence of specific socio-demographic variables on a computerized test of non-verbal neuropsychological performance. Six hundred and thirty South African first year students were assessed using the University of Pennsylvania Computerized Neuropsychological Test Battery... -
Caring for a Relative with Schizophrenia: Understandings, Challenges and the Interface with Mental Health Professionals
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Stanley Molefi --- Stellenbosch University, South Africa Leslie Swartz --- Stellenbosch University, South AfricaThis study explored the experiences of families of people with schizophrenia, their understandings of schizophrenia as a mental disorder, their experience of living with a relative with schizophrenia, and their subsequent contact with mental health professionals. A convenience sample of... -
Experiences of Managers of Aggression in the Workplace
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Chris Myburgh --- University of Johannesburg, South Africa Marie Poggenpoel --- University of Johannesburg, South Africa Sumari Breetzke --- University of Johannesburg, South AfricaThe study explored and described the experiences of workplace aggression by managers in a northern South African district. Participants were seven managers from two medium sized companies. One of the companies was from the dairy industry and the other from... -
South African Mothers' Perceptions and Experiences of an Unplanned Caesarean Section
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Samantha Lynne Roux --- North-West University, South Africa Esme van Rensburg --- North-West University, South AfricaNew motherhood is characterised as a profound change, and research suggests that the psychological effects of childbirth can be significant and far-reaching for some women. This study explored women's perceptions and experiences of childbirth by unplanned Caesarean section. In-depth interviews... -
Self-Efficacy and Physical Self-Concept as Mediators of Parenting Influence on Adolescents' School and Health Wellbeing
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Said Aldhafri --- Sultan Qaboos University, OmanThe current study examines the role of parenting styles (permissive, authoritative, and authoritarian) in predicting adolescents' school and health wellbeing through the mediational role of adolescents' academic self-efficacy and physical self-concept. Data were collected from 1599 Omani adolescents (mean age... -
Mothering Children with Schizophrenia in a Village Setting: A Multiple Case Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Azwihangwisi Josphinah Negota --- University of Limpopo, South Africa Solomon Mashegoane --- University of Limpopo, South AfricaThis study reports on the experiences of mothers (n=8) raising children with schizophrenia in a rural South African village. The mothers were individually interviewed at their homes, using in-depth, phenomenological methods. Data were thematically analysed. Mothers of children with schizophrenia... -
The Experiences of Self-Injury Amongst Adolescents and Young Adults within a South African Context
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Cithra Bheamadu --- University of Johannesburg, Elzette Fritz --- University of Johannesburg, Jace Pillay --- University of Johannesburg,The aim of the study was to explore the experiences of self-injury among adolescents and young adults within the South African context. The participants were twelve university students who had self-injured in their adolescence (females = 92%). The data were... -
Quality of Daily Life with Teenage Motherhood
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Edzisani Sodi --- Tholene Sodi and Partner's Inc, South Africa Tholene Sodi --- University of Limpopo, South AfricaThis study describes teenage mothers' quality of daily life in a South African rural setting. It is a retrospective study. It was conducted with five participant women aged between 26 and 35 years with early motherhood experience. In-depth interviews were... -
Photovoice as Community Engaged Research: The Interplay between Knowledge Creation and Agency in a South African Study on Safety Promotion
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Shahnaaz Suffla --- Medical Research Council, South Africa Debra Kaminer --- University of Cape Town, South Africa Umesh Bawa --- University of the Western Cape, South AfricaThis article aims to describe Photovoice as a method and process of enacting community engaged research. The multi-dimensional nature of Photovoice is illustrated though a case application, focused on safety promotion in two South African low-income communities. Twenty youth, evenly... -
An Ethic of Care in Participatory Research in School Community Settings
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Estelle Swart --- Stellenbosch University, South Africa Marietjie Oswald --- Stellenbosch University, South AfricaWe explored the manifestation and development of an ethic of care in school communities using a variety of participatory research methods. The qualitative data from this ethnographic case study were analysed using constructivist grounded theory. Our findings suggest that an... -
Exploring Perceptions of Xenophobia in a Sample of South African Employees
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Elzabé Coetzee --- University of South Africa, South AfricaThis brief report aimed to explore the perceptions of xenophobia within a sample of South African employees. Data on participants' views regarding xenophobia, related xenophobic violence and causes were collected from 127 respondents (males=43%, females=57%, with the majority of respondents... -
Influence of a Self-identification Meditation Intervention on Psychological and Neurophysiologic Variables
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Stephen D. Edwards --- University of Zululand, South AfricaThis study investigated the influence of a brief, twenty minute, breath based, Self-identification meditation intervention on meditation experiences, identity, mindfulness and spirituality perceptions, and correlative neurophysiologic functioning in a small convenience sample of 10 South African adults (7 women and... -
The Influence of an Unplanned Caesarean Section on Initial Mother-Infant Bonding: Mothers' Subjective Experiences
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Samantha Lynne van Reenen --- North-West University, South Africa Esmé van Rensburg --- North-West University, South AfricaThis study explored the impact of an unplanned Caesarean section on mother-infant bonding, by examining the development of maternal identities and mothers' subsequent relationships with their babies. In-depth interviews with 10 women (mean age=28; SD=1.97) explored their lived experiences of... -
Experiences of Managers and Healthcare Personnel Involved in a Functional Healthcare Public Private Partnership
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Esmeralda Ricks --- Nelson Mandela Metropolitan University, South Africa Dalena van Rooyen --- Nelson Mandela Metropolitan University, South Africa Moloko Priscilla Gantsho --- Nelson Mandela Metropolitan University, South Africa Wilma ten Ham --- Nelson Mandela Metropolitan University, South AfricaThis study explored the experiences of managers and healthcare personnel involved in a functional healthcare public private partnership (PPP) in a semi-rural area situated in the Eastern Cape Province, South Africa. Data on how managers and healthcare personnel experienced their... -
Counselling on Rails: Social Accountability Learning Among South African Psychology Students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Annelize Bonthuys --- North-West University, Itumeleng P. Khumalo --- North-West University, Lynette Flusk --- Transnet-Phelophepa Health-Care Train,This study investigated the utility of train transportation health care service in a North Eastern South African region. Participants were seven psychology graduate students at a South African university. They completed reflective journals on their subjective experience and objective reporting... -
Validating An Adapted Measure of Organisational Energy in the South African Context
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Rowenna Erin Cuff --- University of Pretoria, South Africa Nicolene Barkhuizen --- North-West University, South AfricaThis study validated an adapted measure of organisational energy, namely the Energy Scapes Profile (ESP), in the South African context, considering also possible differences in perceptions of organisational energy by the participants' demographics. Participants were a convenience sample of 304... -
African Migrants' Experiences of Xenophobic Violence in South Africa: A Relational Approach
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Shingairai Chigeza --- North-West University, Alda De Wet --- University of Limpopo, Vera Roos --- North-West University, Charl Vorster --- North-West University,This study explores the experiences of African migrants in relation to South African citizens in the course of xenophobic violence in South Africa. In a secondary data analysis of a larger research project, 44 migrants (both men and women with... -
Dimensions of Job Satisfaction Identified Among South African Black Middle-level Managers: A Qualitative Investigation
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sonja C. Strydom --- Stellenbosch University, René van Eeden --- University of South Africa,The aim of the present study was to identify the factors contributing to job satisfaction for black middle-level managers and to contextualise these factors in terms of Afrocentric values and South Africa's socio-political and historical background. The sample comprised eight... -
Contemplating the Self: A Brief Phenomenological Participatory Action Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Stephen D. Edwards --- Psychology and Educational Psychology Departments, Sumeshni Govender --- Psychology and Educational Psychology Departments, Dumisani R. Nzima --- Psychology and Educational Psychology Departments, Mandla M. Hlongwane --- Psychology and Educational Psychology Departments, Jabulani D. Thwala --- Psychology and Educational Psychology Departments, Ashmin Singh --- Psychology and Educational Psychology Departments, Pricilla B. Mbele --- Psychology and Educational Psychology Departments,This study examines Self contemplation from a heuristic phenomenological and applied psychological perspective using a participatory action research approach. The participant authors (n = 6; females = 50%, majority ethnicity = isiZulu = 67%) engaged in reflective contemplation of the... -
Homomorphisms of complete distributive lattices
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A. Pultr J. Sichler V. TrnkováThe category of all complete distributive lattices and their complete homomorphisms is universal, and this is also true for the category of all complete distributive lattices whose morphisms preserve complete joins, finite meets and an additional nullary operation. A survey... -
The Metric Theory of Tensor Products (Grothendieck's Résumé Revisited) Part 2: Bilinear Forms and Linear Operators Of Type α
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Joe Diestel Jan Fourie Johan SwartIn this continuation of our exposition and expansion of Grothendieck's 'Résumé,' we broach the subject of bilinear forms and operators of type α, where α is a tensor norm, and follow that up with the closely related subject of α-nuclearity. -
A Matching Technique and Structure Theorems for Sturm-liouville Boundary Value Problems with Interior Singularities
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: ThomasM. AchoAsymptotic solutions for the interior double pole Sturm-Liouville boundary value problem are obtained using a method of matched asymptotic approximations. Employing asymptotic forms of the Whittaker functions, the WKB approximations and Airy functions, solutions are obtained valid and non-vanishing on... -
Fully Trend Preserving Operators
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: C.H. RohwerThe concept of fully trend preserving (ftp) operators on sequences was introduced to prove variation preservation on the outputs of LULU-separators. It turns out that this property is central in further analysis of compositions of LULU-smoothers, and other smoothers. Several... -
D-connectedness
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Kim-Quang TranThe aim of this paper is to study the categorical topological notion of connectedness in terms of a rather arbitrary class of morphisms in a category. We propose a general approach to the notion both at the morphism and the... -
Stability of asymptotic properties of Hille-yosida operators under perturbations and retarded differential equations
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Lahcen ManiarWe give conditions on the strongly continuous semigroup (T 0(t)) t≥0, generated by the part of a Hille-Yosida operator A on X 0 := D(A), and a non-autonomous family of operators (B(t)) t≥0 such that the evolution family (U(t,s)) t≥s≥0,... -
Diophantine equations involving general Meixner and Krawtchouk polynomials
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Thomas Stoll RobertF. TichyWhile counting lattice points in octahedra of different dimensions n and m, it is an interesting question to ask, how many octahedra exist containing equally many such points. This gives rise to the Diophantine equation p n (x) =... -
Characterisation of regular graphs as loop graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Eric MwambeneThere have been various generalisations of Cayley graphs, prototypes of transitive graphs. The most generalised is the description of graphs on general groupoids. What has clearly emerged in this exercise is that the philosophy of constructing graphs on groupoids offers... -
Graph-Coloring and Choice a Note on a Note by Shelah and Soifer
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Horst Herrlich Y.T. RhineghostSharpening results of Shelah and Soifer we will show that in ZF set theory the Shelah-Soifer Graph G has the following properties: 1. If AC(2), the axiom of choice for families of 2-element sets, or AC(R), the axiom... -
Sobolev spaces on graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: M.I. OstrovskiiThe present paper is devoted to discrete analogues of Sobolev spaces of smooth functions. The discrete analogues that we consider are spaces of functions on vertex sets of graphs. Such spaces have applications in Graph Theory, Metric Geometry and Convex... -
Representing vertex-transitive graphs on groupoids
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Eric MwambeneVertex-transitive graphs are one of the most favoured class of graphs in modelling scientific phenomena if symmetry is at issue. An understanding of these graphs should, therefore, be an obvious undertaking. Here, we present a characterisation of vertex-transitive graphs as... -
Simultaneous stratification and domination in graphs with minimum degree two
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: MichaelA. Henning J.E. MaritzIn this paper we continue the study of stratification and domination in graphs explored by Chartrand et al. in [4]. We define an F-coloring of a graph to be a red-blue coloring of the vertices such that every blue vertex... -
On some binary codes from orthogonal geometry of characteristic two
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: B.G. RodriguesIn their natural primitive rank-3 action on the singular and non-singular points of the projective space of dimension 2m − 1, the simple orthogonal groups O ε 2m (F2), for ε = ±1 and m ≥ 3 have... -
On characterization of a Riesz homomorphism on C(X)-space
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Z. Ercan S. ÖnalLet X be a realcompact space. We present a very simple and elementary proof of the well known fact that every Riesz homomorphism π: C(X) → R is point evaluated. Moreover, the proof is given in ZF. -
Ideals in Heyting Semilattices and Open Homomorphisms
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jorge Picado Aleš Pultr Anna TozziSubfitness and its relation to openness and completeness is studied in the context of Heyting semilattices. A formally weaker condition (c-subfitness) is shown to be necessary and sufficient for openness and completeness to coincide. For a large class of spatial... -
A Transition from Total Domination in Graphs to Transversals in Hypergraphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: MichaelA. Henning Anders YeoA set S of vertices in a graph G without isolated vertices is a total dominating set of G if every vertex of G is adjacent to a vertex in S. The total domination number of G is the minimum... -
Isomorphisms into section spaces of Banach bundles
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Terje Hõim D.A. RobbinsLet X be a compact Hausdorff space, E a (real) Banach space, and let C(X, E) be the space of continuous functions from X to E. The monograph of Cembranos and Mendoza provides a primer on when C (X, E)... -
On the stabilizers of the minimum-weight codewords of some binary codes from graphs on triples
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: B.G. RodriguesWe determine the stabilizers of the minimum-weight codewords for the binary codes C 2(n) and C 2(n)⊥ obtained from an adjacency matrix of the graph A 2(n) for n ≥ 7 and odd, with vertex set Ω{3}, and adjacency defined... -
On Russell and Anti Russell-Cardinals
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Horst Herrlich --- , Germany Kyriakos Keremedis --- Department of Mathematics, Greece Eleftherios Tachtsis --- Department of Statistics and Actuarial-Financial Mathematics, GreeceIn the absence of the Axiom of Choice we study countable families of 2-element sets with no choice functions which either have infinite subfamilies with a choice function or no infinite subfamilies with a choice function. -
Correlates of missed HIV appointments in low-resource settings: a study from Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Davy Vancampfort --- , Belgium Peter Byansi --- , Uganda Philip B Ward --- , Australia James Mugisha --- , UgandaAims: Alarming reports of antiretroviral treatment failure have recently emerged in sub-Saharan Africa. The onset of virologic failure has multiple causes but suboptimal treatment adherence is one of the leading causes. This study aimed to explore correlates of adherence to... -
SPREAD UNIFORMITIES AND UNIFORM SPREADS
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Hlengani Slweya --- Department of Mathematics, University of the North, Sovenga, South Africa,We discuss a point-free analog of the topological fact that every uniformly continuous function on a dense subspace of a uniform space into a complete uniform space has a unique uniformly continuous extension. It is shown that a uniform frame... -
TRACES OF EPIMORPHISM CLASSES
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Lutz Schroder --- Department of Mathematics and Computer Science, University of Bremen, Bremen, Germany,Classes of morphisms that occur as preimages of the class of all epi-morphisms, of all extremal epimorphisms, respectively of all retractions under some faithful functor are characterized by suitable closure properties. The corresponding question for regular or strict epimorphisms is... -
Automatic Continuity of N-Homomorphisms between Banach Algebras
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: TaherG. Honary --- , Iran H. Shayanpour --- , IranAn n-homomorphism between algebras is a linear map θ: A→B such that θ(a 1 a 2…an ) = θ(a1)θ(a2)…θ(an ) for all elements a 1,a 2…, an ∈ A. If A is a unital algebra it is known that every... -
Interior Operators and Topological Connectedness
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: G. Castellini --- Department of Mathematical Sciences, U.S.A. J. Ramos --- Department of Mathematical Sciences, U.S.A.A categorical notion of interior operator is used in topology to define connectedness and disconnectedness with respect to an interior operator. A commutative diagram of Galois connections is used to show a relationship between these notions and Arhangelskii and Wiegandt's... -
On algorithmic aspects of the l-torsion of Brauer groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Lin Wang --- School of Mathematical Sciences, P.R. China Mao-Zhi Xu --- School of Mathematical Sciences, P.R. ChinaWe study the algorithmic aspects of the l-torsion of the Brauer group Br(K) of a field K which contains the l-th roots of unity µ l, only provided with basic operations on the elements of K. We use a primitive... -
Schur spaces and weighted spaces of type H ∞
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Alejandro Miralles --- Instituto Universitario de Matemáticas y Aplicaciones de Castelló (IMAC), Departamento de Matemáticas, SpainWe extend some results related to composition operators on H υ(G) to arbitrary linear operators on H υ0(G) and H υ(G). We also give examples of rank-one operators on H υ(G) which cannot be approximated by composition operators. -
Codes related to line graphs of triangular graphs and permutation decoding
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Washiela Fish --- Department of Mathematics and Applied Mathematics, South Africa Khumbo Kumwenda --- Department of Mathematics and Applied Mathematics, South Africa Eric Mwambene --- Department of Mathematics and Applied Mathematics, South AfricaFor any prime p, we consider p-ary linear codes obtained from the row span of incidence matrices of line graphs of triangular graphs and adjacency matrices of their line graphs. We determine parameters of the codes, their automorphism groups and... -
On the solutions of the exponential Diophantine equation a x + b y = (m 2 + 1) z
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bo He --- Department of Mathematics, P.R. China Alain Togbé --- Mathematics Department, USA Shichun Yang --- Department of Mathematics, P.R. ChinaIn this paper, we consider the Diophantine equation a x + b y = c z . Combining Laurent's result on lower bounds for linear forms in two logarithms, Bugeaud's result on upper bounds for the p-adic... -
On the metric dimension of generalized Petersen graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Shabbir Ahmad --- Centre for advanced studies in Pure and Applied Mathematics, Pakistan Muhammad Anwar Chaudhry --- Centre for advanced studies in Pure and Applied Mathematics, Pakistan Imran Javaid --- Centre for advanced studies in Pure and Applied Mathematics, Pakistan Muhammad Salman --- Centre for advanced studies in Pure and Applied Mathematics, PakistanA family G of connected graphs is said to be a family with constant metric dimension if its metric dimension is finite and does not depend upon the choice of G in G. In this paper, we study the metric... -
The automorphism groups of domains in complex space: a survey
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: StevenG. Krantz --- Department of Mathematics, U.S.AWe consider recent developments in the study of automorphism groups of domains in complex space. Particular attention is paid to results with a basis in geometry. -
Superposition operators between weighted spaces of analytic functions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Christopher Boyd --- School of Mathematical Sciences, Ireland Pilar Rueda --- Departamento de Análisis Matemático, Facultad de Matemáticas, SpainWe study the existence and the continuity of superposition operators between weighted spaces of holomorphic functions in terms of the weights. -
Children and youth at risk: adaptation and pilot study of the CHAMP (Amaqhawe) programme in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Arvin Bhana Inge Petersen Andy Mason Zoleka Mahintsho Carl Bell Mary McKayThis paper reports on the adaptation and pilot study of the CHAMP programme (Collaborative HIV/AIDS and Adolescent Mental Health Programme) in South Africa with specific reference to outcome effects among adults. CHAMP was originally developed in the United States and... -
Willingness to care for children orphaned by HIV/AIDS: a study of foster and adoptive parents
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Loraine Townsend Andy DawesThere is substantial evidence to indicate that South Africa is facing the prospect of a large number of children, now and in the future, who will be orphaned as a result of the HIV/AIDS pandemic. Following the incapacitation and/or death... -
Breaking the silence: using memory books as a counselling and succession-planning tool with AIDS-affected households in Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Sophie Witter Beatrice WereThis article reviews the experience of NACWOLA and Save the Children (UK) in using 'memory books' in AIDS-affected households in Uganda from the mid-1990s to the present. Semi-structured interviews were carried out with key stakeholders in early 2004, including NACWOLA... -
Developmental vulnerabilities and strengths of children living in child-headed households: a comparison with children in adult-headed households in equivalent impoverished communities
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: David Donald Glynis ClachertyThis pilot study addresses the need to clarify specific developmental vulnerabilities and strengths that characterise children living in child-headed households in comparison to children living in adult-headed households in equivalent impoverished communities. Samples of 10 each of these two categories... -
Containment and contagion: How to strengthen families to support youth HIV prevention in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Zubeda Paruk Inge Petersen Arvin Bhana Carl Bell Mary McKayThere has been little research done in South Africa that investigates how families nested within communities can be strengthened to support the prevention of HIV infection in youth. A focused ethnographic case-study approach was employed to better understand how families... -
Lover, mother or worker: women's multiple roles and the HIV/AIDS and reproductive health agenda in Tanzania
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Lisa Ann RicheyInternational and national campaigns to prevent HIV/AIDS and efforts to promote reproductive health remain separate in terms of conceptualisation and implementation. Local negotiations around reproductive health issues similarly seem to lack explicit attention to HIV/AIDS. This paper argues that even... -
Modelling a traditional game as an agent in HIV/AIDS behaviour-change education and communication
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Charles Ogoye-NdegwaThe level of HIV/AIDS awareness among the Luo of western Kenya is at its highest yet the epidemic continues unabated. While HIV/AIDS is locally recognised as an emergent deadly condition, people seem unconcerned. Deaths related to HIV/AIDS are often euphemistically... -
HIV/AIDS, childhood and governance: sundering the bonds of human society
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Tony BarnettThere is a disharmonious resonance between the length of HIV infection in the individual human host and the length of a human generation. In brief, an infected person may have children, these may be orphaned and grow up to become... -
'But where are our moral heroes?' An analysis of South African press reporting on children affected by HIV/AIDS
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Helen Meintjes Rachel BrayMessages conveyed both explicitly and implicitly in the media play an important role in shaping the public's understanding of issues, as well as in shaping associated policy, programmes and popular responses to these issues. This paper applies discourse analysis to... -
What do Tanzanian children worry about?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Mai Bente Snipstad Gro Therese Lie Dagfinn WinjeThis paper explores the worries of children in a sample of 8- to 15-year-old children, drawn from three primary schools on the outskirts of Moshi, Tanzania. Data about children's worries were collected by two methods. First, lists of worries were... -
Beyond liminality: orphanhood and marginalisation in Botswana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Marguerite DanielFor children, the death of a parent initiates a rite of passage, a three-stage process: separation from their status as 'son' or 'daughter', a period of liminality with rituals of mourning, burial and interment, and finally re-aggregation into a re-formed... -
Loveness and her brothers: trajectories of life for children orphaned by HIV/AIDS in Zambia
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: C Bawa YambaA central theme in the contemporary rhetoric of those charged with managing HIV/AIDS interventions is how to handle and alleviate the plight of orphans and other vulnerable children (OVCs). The many glossy documents describing the policy and action plans of... -
The children left to stand alone
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Sidsel RoalkvamDrawing upon ethnographic fieldwork in Seke, a semi-rural area outside Harare, Zimbabwe, this paper explores the social mechanism behind the seeming invisibility of children left on their own and how this form of 'invisibility' challenges established notions of childhood, parenthood,... -
Vaccine preparedness: lessons from Lyantonde, Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Paul Ritvo Dennis Willms Robert Meisner Laura Brown Adam Goldman Nelson SewankamboTo explore how to better educate rural Africans about preventive HIV/AIDS vaccine trials, 15 semi-structured, open-ended interviews were conducted with villagers in Lyantonde, Rakai District, Uganda. This study reports on the findings by focusing on the attitudes, knowledge and questions... -
Relationships, partnerships and politics in the lives of the urban poor in AIDS-afflicted Swaziland
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Lynne JonesThis paper seeks to better understand how poor urban families caring for children are able to access help from beyond the kinship group in a setting where HIV prevalence has risen to over 40%. The fieldwork shows that livelihoods were... -
Is khat-chewing associated with HIV risk behaviour? A community-based study from Ethiopia
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Abebe Dawit Asfaw Debella Amare Dejene Almaz Abebe Yared Mekonnen Ambaye Degefa Lemma KetemaThis study examines the possible association between the stimulant khat and risky sexual behaviour that might aggravate the spread of HIV. A community-based cross-sectional survey involving 4 000 individuals and focus group discussions were conducted to assess the attitudes and... -
Motor speed and reaction time in HIV/AIDS patients: a case-control study
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Olubunmi Ogunrin Francis OdiaseHIV infection can produce a range of cognitive and behavioural symptoms that become more frequent and severe as the immune system deteriorates. This case-control study assessed the reaction time and the motor speed of Nigerian Africans with HIV or AIDS... -
Understanding visuals in HIV/AIDS education in South Africa: differences between literate and low-literate audiences
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Adelia Carstens Alfons Maes Lilian Gangla-BirirThis article reports on a research project aimed at determining the scope and nature of differences in picture comprehension between literate and low-literate audiences in the context of HIV and AIDS. Structured interviews were held with 30 low-literate and 24... -
Modelling the relationship between antiretroviral treatment and HIV prevention: limitations of the Spectrum AIDS Impact Model in a changing policy environment
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Nicoli NattrassThis paper shows how two publicly available epidemiological modelling packages, namely the Spectrum AIDS Impact Model and the ASSA2003 AIDS and Demographic Model, predict very different impacts from rolling out highly active antiretroviral treatment (HAART) on new HIV infections. Using... -
Socio-demographic and clinical features of HIV-positive outpatients at a clinic in south-west Nigeria
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: FrankI Ojini Adenike CokerDespite the increasing prevalence of HIV in Nigeria, there is scarce knowledge about the spectrum of HIV-related diseases in the country. This paper documents the profile of outpatients seen at the HIV clinic of the Lagos University Teaching Hospital (LUTH),... -
Knowledge of HIV/AIDS, sexual behaviour and prevalence of sexually transmitted infections among female students of the University of Buea, Cameroon
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Theresa Nkuo-Akenji Armand Nkwesheu Raymond Nyasa Esther Tallah Roland Ndip Fru Angwafo IiiThe study investigates the cognitive effect of knowledge and protective practices on the prevalence of HIV and some sexually transmitted infections (STIs) among female students of the University of Buea, Cameroon. A cross-sectional study involving the analysis of a questionnaire... -
The making of vulnerabilities: understanding the differentiated effects of HIV and AIDS among street traders in Warwick Junction, Durban, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: May Chazan Alan WhitesideThe end of apartheid in South Africa has led to political-economic transition, the deregulation of cities, and increased population mobility, with growing numbers of people living and working in sub-standard and 'informal' urban conditions. These processes have created a fertile... -
Misconceptions about HIV prevention and transmission in Botswana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Gobopamang LetamoMisconceptions about how HIV can be transmitted or prevented often prevent individuals from making informed choices and taking appropriate action. The purpose of the research was to explore the socio-demographic and behavioural factors in Botswana that are associated with misconceptions... -
Key determinants of AIDS impact in Southern sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Wayne Xavier ShanderaTo investigate why Southern sub-Saharan Africa is more severely impacted by HIV and AIDS than other parts of sub-Saharan Africa, I conducted a review of the literature that assessed viral, host and transmission (societal) factors. This narrative review evaluates: 1)... -
Young Malawians on the interaction between mental health and HIV/AIDS
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Jerome Wright Fred Lubben Mac Bain MkandawirePrevious research has identified high levels of mental health problems among people affected by HIV. This study surveys specifically adolescents in southern Malawi on their experience of the impacts of living with HIV or AIDS on one's mental health. At... -
Epidemiological and demographic HIV/AIDS projections: South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: ThomasM. Rehle --- , USA Olive Shisana --- , South AfricaThe Epidemic Projection Package (EPP) recently developed by the UNAIDS Reference Group on Estimates, Models and Projections and the Spectrum model program developed by the Futures Group were used to model the South African HIV epidemic, project future trends in... -
Bereavement, silence and culture within a peer-led HIV/AIDS-prevention strategy for vulnerable children in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ingrid Van der Heijden --- Child, Youth, Family and Social Development Research Programme, South Africa Sharlene Swartz --- Child, Youth, Family and Social Development Research Programme, South AfricaIn addressing the psychosocial effects of the HIV and AIDS pandemic among vulnerable children, the issue of bereavement appears inadequately addressed. Amid the global discourse on children orphaned and made vulnerable by HIV and AIDS, this paper explores how cultural... -
Positive care? HIV and residential care for children in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Susan Moses --- , South Africa Helen Meintjes --- , South AfricaResponses to the HIV epidemic leading to an increase in the number of residential care facilities for children across sub-Saharan Africa have prompted concerns that large numbers of orphaned children are being placed in institutional care. There is little empirical... -
African communalism and public health policies: the relevance ofindigenous concepts of personal identity to HIV/AIDS policies in Botswana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Kipton Jensen --- Department of Philosophy and Religion, United States JosephBR Gaie --- Department of Religious Studies, Theology and Philosophy, BotswanaThis article explores the possible relevance of African communalism to HIV/AIDS policies in Botswana and other parts of sub-Saharan Africa. We examine various interpretations of African communalism, which many consider to be the cardinal insight of African thought. We suggest... -
‘Every disease has its cure’: faith and HIV therapies in Islamic northern Nigeria
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Jack Ume Tocco --- Department of Anthropology, United StatesNorthern Nigeria has one of the highest levels of HIV prevalence among societies that are predominantly Muslim. In the last decade the region has experienced marked expansion of religiously-oriented healing practices following the formal adoption of Islamic sharia law. Since... -
Christian identity and men's attitudes to antiretroviral therapy in Zambia
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Anthony Simpson --- School of Social Sciences, United KingdomIncreasing access to antiretroviral therapy (ART), especially in urban areas in Zambia, has transformed the landscape of the HIV epidemic to include hope. Drawing upon long-term ethnographic research, this article briefly describes the religious ideas of a cohort of former... -
Religion, authority and their interplay in the shaping of antiretroviraltreatment in western Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: AlexanderMJ Leusenkamp --- , The NetherlandsThe article explores how religious actors have increasingly shaped the nature of antiretroviral treatment (ART) services in Kabarole district, western Uganda. As have the regular health services, Christian donors, non-governmental organisations (NGOs), and churches in the district have also stepped... -
Complex negotiations: ‘spiritual’ therapy and living with HIV in Ghana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Benjamin Kobina Kwansa --- Amsterdam School for Social Science Research, The NetherlandsMany people living with HIV in Ghana make use of spiritual therapy, however complex. This paper describes the complexities of these therapies in the context of increasing access to antiretroviral (ARV) drugs and high levels of HIV stigma. The study... -
Sexuality among the elderly in Dzivaresekwa district of Harare: the challenge of information, education and communication campaigns in support of an HIV/AIDS response
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ignatius Gutsa --- Department of Sociology, ZimbabweThis ethnographic study in Dzivaresekwa district, Harare, Zimbabwe, examines the issue of sexuality among the elderly and their challenges in accessing information, education, and communication (IEC) campaigns in the face of HIV and AIDS. The research depended heavily on collecting... -
Negotiating therapeutic citizenship and notions of masculinity in a South African village
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Sakhumzi Mfecane --- Department of Anthropology and Sociology, South AfricaThe article explores the idea of therapeutic citizenship in relation to the experiences of men who attend support groups for people living with HIV or AIDS (PLHIV). At a rural South African health facility offering free antiretroviral (ARV) medicines, support... -
Why HIV/AIDS should be treated as exceptional: arguments from sub-Saharan Africa and Eastern Europe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Julia Smith --- , United Kingdom Khaled Ahmed --- , South Africa Alan Whiteside --- , South AfricaThe idea that HIV and AIDS gets too much attention and funding emerged in 2008 with a call to end 'AIDS exceptionalism.' This article outlines a short history of AIDS exceptionalism — the idea that HIV and AIDS require a... -
Health-promoting practices and the factors associated with self-reported poor health in caregivers of children orphaned by AIDS in southwest Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Rhoda Suubi Muliira --- , Oman Joshua Kanaabi Muliira --- , OmanInformal caregivers worldwide are faced with the dilemma of maintaining their health and meeting the caregiving demands of their loved ones. This study explores the health outcomes of caregiving, caregivers’ health-promoting practices and the challenges to providing care among caregivers... -
Evaluating adverse drug reactions among HAART patients in a resource-constrained province of South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Viloshini Krishna Manickum --- School of Health Sciences, South Africa Fatima Suleman --- School of Health Sciences, South AfricaThe high prevalence of HIV in KwaZulu-Natal Province, South Africa, has greatly increased the demand for antiretroviral therapy (ART), resulting in an exponential increase in the number of patients initiated on highly active antiretroviral treatment (HAART). However, little information about... -
Resilience through participation and coping-enabling social environments: the case of HIV-affected children in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Morten Skovdal --- Department of Health Promotion and Development, Norway Marguerite Daniel --- Department of Health Promotion and Development, NorwayMany children and youths living in low-resource and high-HIV-prevalence communities in sub-Saharan Africa are presented with daily hardships that few of us can even imagine. It is therefore no surprise that most research reporting on the experiences of HIV-affected children... -
Safeguarding inheritance and enhancing the resilience of orphaned young people living in child- and youth-headed households in Tanzania and Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ruth Evans --- Department of Geography and Environmental Science, United KingdomThis article explores the resilience of orphaned young people in safeguarding physical assets (land and property) inherited from their parents and sustaining their households without a co-resident adult relative. Drawing on the concept of resilience and the sustainable livelihoods framework,... -
Challenges and coping strategies of orphaned children in Tanzania who are not adequately cared for by adults
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Marguerite Daniel --- Department of Health Promotion and Development, Norway Angela Mathias --- Department of Health Promotion and Development, NorwayOrphaned children in poor rural communities sometimes have no adult who is able to care for them or else the adult caregiver is not able to provide adequate care. Tanzania remains one of the poorest countries in the world, and... -
The use of rites of passage in strengthening the psychosocial wellbeing of orphaned children in Botswana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Masego Thamuku --- Department of Health Promotion and Development, Norway Marguerite Daniel --- Department of Health Promotion and Development, NorwayChildren who have been bereaved in the context of AIDS may experience many challenges to their psychosocial wellbeing. Programmes to help orphaned children are usually anchored in child rights. As the individual focus of rights-based approaches is inept in African... -
Coping with hardship through friendship: the importance of peer social capital among children affected by HIV in Kenya
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Morten Skovdal --- Department of Health Promotion and Development, Norway Vincent Onyango Ogutu --- , KenyaChildren living in households affected by HIV face numerous challenges as they take on significant household-sustaining and caregiving roles, often in conditions of poverty. To respond to their hardships, we must identify and understand the support systems they are already... -
Schoolchildren affected by HIV in rural South Africa: schools as environments that enable or limit coping
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Fumane Khanare --- School of Education, South AfricaThe importance of psychosocial support for the wellbeing of children made vulnerable by HIV is a frequently discussed topic in the fields of education and HIV-related social science research. For children to juggle both the demands of education and the... -
Questioning the use-value of social relationships: care and support of youths affected by HIV in child-headed households in Port Elizabeth, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Diana Van Dijk --- Centre for International Development Issues Nijmegen (CIDIN), The Netherlands Francien Van Driel --- Centre for International Development Issues Nijmegen (CIDIN), The NetherlandsThe opinion that the extended family can fulfil its supportive role in assisting child-headed households continues to exist. How these households encounter support, what this support entails, and how they experience this support is an under-researched subject. Most research literature... -
‘Trophy-hunting scripts’ among male university students in Zimbabwe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Nelson Muparamoto --- Department of Sociology, ZimbabweDrawing on a multi-method qualitative study, this article examines ‘trophy-hunting’ scripts among male university students in Zimbabwe. ‘Trophy hunting’ is a term I have adopted to refer to hegemonic masculinity rituals through which men gain social admiration for dating and... -
Correlates of HIV-status awareness among adults in Nairobi slum areas
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Remare Renner Ettarh --- , Kenya James Kimani --- , Kenya Catherine Kyobutungi --- , Kenya Frederick Wekesah --- , KenyaThe prevalence of HIV in the adult population in slum areas in Nairobi, Kenya, is higher than for residents in the city as a whole. This disparity suggests that the characteristics of slum areas may adversely influence the HIV-prevention strategies... -
An exploratory study of the individual determinants of students’ sexual risk behaviour at a South African university
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Given Mutinta --- Health Economics and HIV/AIDS Research Division (HEARD), South Africa Kaymarlin Govender --- Health Economics and HIV/AIDS Research Division (HEARD), South Africa Jeff Gow --- Health Economics and HIV/AIDS Research Division (HEARD), South Africa Gavin George --- Health Economics and HIV/AIDS Research Division (HEARD), South AfricaThe prevalence of sexual risk behaviour is high on campuses at South African universities, putting many students at risk of HIV infection. This study explores individual influences on students’ sexual risk-taking behaviour at the University of KwaZulu-Natal. The study collected... -
Cost-effectiveness analysis of infant feeding strategies to prevent mother-to-child transmission of HIV in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Mandy Maredza --- MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, South Africa Melanie Y Bertram --- MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, South Africa Haroon Saloojee --- Division of Community Paediatrics, School of Clinical Medicine, Faculty of Health Sciences, South Africa Matthew F Chersich --- Centre for Health Policy, School of Public Health, Faculty of Health Sciences, South Africa Stephen M Tollman --- MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, South Africa Karen J Hofman --- MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, South AfricaDespite increasing availability of perinatal interventions to prevent mother-to-child transmission (MTCT) of HIV in South Africa, MTCT remains high due to breastfeeding. To inform policy decisions in the country, cost-effectiveness of alternative infant-feeding interventions was conducted. Mathematical modelling was used... -
The impact of the declining extended family support system on the education of orphans in Lesotho
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Pius T Tanga --- Department of Social Work/Social Development, South AfricaThis paper examines the impact of the weakening of the extended family on the education of double orphans in Lesotho through in-depth interviews with participants from 3 of the 10 districts in Lesotho. The findings reveal that in Lesotho the... -
Support groups for HIV-positive people in South Africa: Who joins, who does not, and why?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Wenche Dageid --- Department of Psychology, NorwayPsychosocial health care for persons living with HIV/AIDS (PLWHA) is inadequate. Support groups for PLWHA could offer arenas where psychosocial issues are addressed, yet more knowledge is needed about those who join and those who do not join such groups... -
Treating ‘AIDS blindness’: A critical pedagogical approach to HIV education at tertiary level
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Lesley Wood --- COMBER, Faculty of Education Sciences, South Africa Julialet Rens --- COMBER, Faculty of Education Sciences, South AfricaHIV and AIDS affect all South Africans, irrespective of gender, race, age and economic status. Teachers should therefore be able to meaningfully integrate HIV content into the school curriculum. However, pre-service teacher education programmes still do not pay adequate attention... -
Towards the assessment of the trophic status of South African impoundments for management purposes: Bon Accord Dam
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CE van Ginkel BC Hohls E VermaakThe 1 mg/l phosphate effluent standard legislated in South Africa in 1980 in seven sensitive catchments, and ad hoc eutrophication-related requests, necessitated the monitoring of 53 impoundments throughout the country. Variables that were monitored, and are still being monitored in... -
An assessment of the health of two rivers within Harare, Zimbabwe, on the basis of macroinvertebrate community structure and selected physicochemical variables
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C PhiriThe aim of this study was to assess and compare the water quality of the Gwebi and Mukuvisi Rivers, on the basis of selected physicochemical variables and macroinvertebrate community structure. Five sites where selected on both rivers and these were... -
Aftermath of simultaneous toxic spills in the Klein Nyl River, Northern Province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Jooste L PollingIn late August 1998, a mechanical malfunction at the Nylstroom Sewage Treatment Works resulted in a massive quantity of untreated sewage flowing into the Klein Nyl River. Simultaneously, 5km upstream, a poly-aromatic hydrocarbon poison was simultaneously leaked into the same... -
Physical determinants of the distribution and abundance of the burrowing ocypodid crab Paratylodiplax blephariskios Stebbing in the St. Lucia and Mhlathuze estuaries, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen AT Forbes DP Cyrus SE PiperThe burrowing ocypodid crab, Paratylodiplax blephariskios, is endemic to the southeast coast of southern Africa where it forms an important component of the estuarine benthic fauna in muddy substrata. Two estuaries in KwaZulu-Natal, namely St. Lucia and the Mhlathuze, were... -
Water — The common element: Lessons from antiquity and the health of the environment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C DickensThe chief pursuit of all aquatic science is to come to know the rules that govern aquatic systems. In this pursuit many scientists move in the direction of greater diversity, where the laws that govern ecosystem relationships become increasingly confined... -
Distribution and biogeography of the Paradiaptominae (Copepoda: Calanoida: Diaptomidae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA RaynerThe Paradiaptominae, a subfamily of the large Diaptomidae family, is a small group of freshwater calanoids of which 24 species in four genera have been described. They are endemic to Africa with the exception of four species, Metadiaptomus asiaticus (Asia... -
The development of a GIS atlas of southern African freshwater fish
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LEP Scott PH Skelton AJ Booth L VerheustA geographic information systems (GIS) based atlas of southern African freshwater fish has been developed for the SADC countries. The JLB Smith Institute of Ichthyology, in collaboration with ALCOM, has developed a database of freshwater fish for this region from... -
Proportional growth and maturation in Penaeus indicus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HFB ChampionA least squares estimation of inflected linear regression is used to interpret the relationships between carapace length (CL) and total length, abdominal length and abdominal width respectively, in Penaeus indicus and Metapenaeus monoceros. In both species well-defined inflection points with... -
Genetic varaiation within and differentiation between Pseudobarbus quathlambae (Pisces, Cyprinidae) populations from the Senqunyane, Jordane and Bokong Rivers (Central Lesotho)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FH van der Bank JL Rall GJ SteynHorizontal starch-gel electrophoresis was used to obtain baseline genetic information on critically endangered Pseudobarbus quathlambae populations in the Senqunyane, Jordane and Bokong Rivers in the Lesotho Highlands. Allelic frequencies were similar between the populations and generations studied. However, allele classes... -
Phytoplankton/protozoan dynamics in the Nyara Estuary, a small temporarily open system in the Eastern Cape (South Africa)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DR Walker R Perissinotto RPA BallyMost estuarine studies in South Africa have focused on larger estuaries, while numerous, smaller, temporarily open estuaries have received little research attention. This study examines the phytoplankton distribution in relation to physical and chemical variables through a quasi-seasonal cycle (from... -
The application of a hydraulic biotope matrix to the assessment of available habitat: Potential application to IFRs and river health monitoring
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RA Wadeson KM RowntreeIn an attempt to meet the requirement of the new South African Water law a number of initiatives are under way to determine the flow requirements for our rivers. An essential component of this initiative is the determination of the... -
Beacons in the limnological landscape
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BR AllansonAn overview is given of a number of major developments in the limnology of South Africa, Zimbabwe and Namibia. None was possible without the involvement of enthusiastic investigators who, over some 70 years, stimulated the growth of freshwater research in... -
Changes in the distribution of emergent aquatic plants in a brackish South African estuarine-lake system
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IA RussellVegetation mapping in the Wilderness Lakes indicated that, between 1975 and 1997, prominent increases occurred in the distribution of the mapping units Phragmites australis (53.9ha; +53%), grass or fields (23.1ha; +35%) and scrub or trees (12.2ha; +45%). Over the same... -
Phylogeography of the African catfish, Chrysichthys maurus (Valenciennes, 1839)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: J-F AgnèsePolymorphism at 19 allozyme loci was studied in 227 individuals of the catfish, Chrysichthys maurus (Valenciennes, 1839), collected from ten populations representing nine different river basins in west Africa. Eleven of the loci studied were polymorphic. Analysis showed that populations... -
An assessment of the nkacha net fishery of Lake Malombe, Malawi
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OLF Weyl KR Mwakiyongo DS MandereSince the early 1990s the fishery of Lake Malombe, Malawi, has been dominated by haplochromine cichlids which are mainly harvested with a small-scale purse seine called an nkacha net. The annual landings from the fishery declined from 9 500 tons... -
A method for monitoring mangrove harvesting at the Mngazana estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Anusha Rajkaran JanineB Adams DerekR du PreezThe Mngazana estuary supports the third largest area of mangroves, and probably the largest stand of Rhizophora mucronata Lamk., in South Africa. The objective of this study was to determine the extent of harvesting in the Mngazana mangrove forest, using... -
Biochemical genetic variation between four populations of Labeobarbus polylepis from three river systems in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PFS Mulder D Engelbrecht JS Engelbrecht F RouxThe genetic variation within four Labeobarbus polylepis populations from both river and dam environments in the Limpopo, Incomati and Phongolo River systems was studied. Gene products of 22 enzyme-coding loci were resolved using horizontal starch gel electrophoresis. Fourteen (64%) of... -
Limnology of southern African coastal lakes — new vistas from Mozambique
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RobC Hart Custodio BoaneFourteen mostly small, isolated, and relatively deep coastal inundation lakes were surveyed during the cool season (August) of 1996. No thermal or chemical stratification existed, but near-bottom hypoxia was evident in several systems. Ionic conductivity varied quite widely, but was... -
Macro-invertebrate predators of freshwater pulmonate snails in Africa, with particular reference to Appasus grassei (Heteroptera) and Procambarus clarkii (Decapoda)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CC Appleton BV Hofkin A BaijnathA range of African and alien macro-invertebrates has been reported preying on freshwater pulmonate snails, including those that serve as intermediate hosts for bloodflukes of the genus Schistosoma. Predation by five molluscivorous taxa is reviewed here: indigenous leeches (Glossiphoniidae), marsh... -
Phosphorus sorption characteristics of sediment in the Simiyu and Kagera River basins: implications for phosphorus loading into Lake Victoria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RA TamatamahAs part of a larger study to assess the influence of land use on riverine and atmospheric phosphorus (P) loading to Lake Victoria, P sorption characteristics of eight composite bottom sediment samples from the Simiyu and Kagera rivers were determined... -
The phytoplankton of Great Bitter Lake, Egypt, including the impacts of nutrient-laden and heated effluents
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HusseinE Touliabah WilliamD TaylorA year-long survey of the phytoplankton and nutrients in Great Bitter Lake indicates that this is a severely eutrophic lake. Chlorophyll levels were consistently high (>30μg/l), especially in summer (>90μg/l). The phytoplankton community comprised mostly diatoms and blue-green algae, although... -
Preliminary results on the ichthyocidal properties of Euphorbia ingens (Euphorbiaceae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MathewJ Ross GertJ SteynEuphorbia ingens belongs to the family Euphorbiaceae, which includes a variety of latex-producing plants, the majority of them having ichthyocidal properties (Coates-Palgrave 2000). Tests to determine the degree of virulence of E. ingens latex used Cyprinus carpio and Xenopus laevis... -
Phylogenetic relationships between some African Characidae, Disticho-dontidae and Hepsetidae: results of allozyme and mtDNA data analyses
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FH van der Bank A Kotzé TM FalkThe present study considers phylogenetic relationships of some southern, eastern and western African Characidae, Distichodontidae and Hepsetidae species, for which only limited genetic data with respect to their classification and phylogeny are currently available. Thirteen species representing three families and... -
Louisiana crayfish (Procambarus clarkii) (Crustacea: Cambaridae) in Kenyan ponds: non-target effects of a potential biological control agent for schistosomiasis
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DavidM Lodge SadieK Rosenthal KennethM Mavuti Wairimu Muohi Philip Ochieng SamanthaS Stevens BenjaminN Mungai GeraldM MkojiThe Louisiana crayfish (Procambarus clarkii) has been proposed as a biological control agent for the intermediate snail hosts (Bulinus and Biomphalaria spp.) of human schistosomes (Schistosoma haematobium and S. mansoni) in Kenya. Using laboratory and field experiments, we examined the... -
Fecundity and sexual maturity of the crab Macrophthalmus depressus (Brachyura: Ocypodidae) from Inhaca Island, Mozambique
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Carlos Litulo Adriano Macia FernandoLM MantelattoSome reproductive aspects of the ocypodid crab Macrophthalmus depressus, were investigated, with emphasis on fecundity and sexual maturity. Random intertidal crab samples taken in October 2002 were identified, sexed, measured, checked for the presence of eggs on female pleopods, dissected... -
The trophic position of planktonic ciliate populations in the food webs of some East African lakes
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AndrewW Yasindi WilliamD TaylorThe trophic role of planktonic ciliates was investigated in the food webs of 17 East African lakes of different salinity and trophy. Experiments with 1μm latex beads showed that Cyclidium, Halteria, Dysteria, Aspidisca and Vorticella are bacterivores. Examination of food... -
Distribution and habitats of Bulinus natalensis and its role as intermediate host of economically important helminth parasites in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: KennéN de Kock CorneliusT WolmaransThis article focusses on the geographical distribution and habitats of Bulinus natalensis, as reflected by the samples taken from 244 collection sites on record in the database of the National Freshwater Snail Collection (NFSC) at the Potchefstroom campus of the... -
The impact of land use on water quality of the Lwiro River, Democratic Republic of Congo, Central Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M BagalwaThe water quality of the Lwiro River, Democratic Republic of Congo (DRC), Central Africa, was investigated on a monthly basis from December 1999–October 2000, at six stations along a hydraulic gradient from source to mouth, to evaluate the impact of... -
Cyanobacteria and cyanotoxins in the source water from Lake Chivero, Harare, Zimbabwe, and the presence of cyanotoxins in drinking water
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Lindah Mhlanga Jenny Day Gertrud Cronberg Moses Chimbari Nqobizitha Siziba Heléne AnnadotterThe phytoplankton community and cyanotoxins in Lake Chivero (formerly Lake McIlwaine) and the presence of cyanotoxins in treated drinking water were investigated between 2003 and 2004. A typical seasonal succession of Cyanobacteria species occurred from January to April, Bacillariophyta from... -
Estimation of preferred water flow parameters for four species of Simulium (Diptera: Simuliidae) in small clear streams in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NicholasA Rivers-Moore FerdinandC de Moor SharonA Birkholz RobertW PalmerBlackfly larvae typically occur in fast-flowing riffle sections of rivers, with different blackfly species showing preferences for different hydraulic conditions. Very little quantitative data exist on hydraulic conditions linked to the blackfly species occurring in South African streams. Stones-in-current biotopes... -
Fatty acid composition of muscle and heart tissue of Nile perch, Lates niloticus, and Nile tilapia, Oreochromis niloticus, from various populations in Lakes Victoria and Kioga, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Justus Kwetegyeka G Mpango O Grahl-NielsenThe fatty acid composition in the heart tissue and muscle tissue of the Nile perch, Lates niloticus, and Nile tilapia, Oreochromis niloticus populations from Lakes Kioga and Victoria was determined by methanolysis and gas chromatography of the resulting fatty acid... -
Comparative analysis of the aquaculture potential of hybrid Tilapia zillii (male) × T. guineensis (female) (Teleostei: Cichlidae) in floating cages, cement tanks and earth ponds
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CélineSK Nobah Tidiani Koné Valentin N'Douba Jos Snoeks Gouli Gooré Bi EssetchiP KouamélanThe effect of three rearing systems, floating cages, cement tanks and earth ponds, on the growth rate, feeding efficiency and mortality rates of hybrid tilapia — Tilapia zillii (male) × T. guineensis (female) — was evaluated for 233 days. Fish... -
The response of Cyperus papyrus (L.) and Miscanthidium violaceum (K. Schum.) Robyns to eutrophication in natural wetlands of Lake Victoria, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: J Kipkemboi --- Department of Zoology, Kenya F Kansiime --- , Uganda P Denny --- , The NetherlandsInterrelationships between nutrient concentrations and aerial biomass, root numbers, length and rhizomes size in Cyperus papyrus (L.) (papyrus) and Miscanthidium violaceum (K. Schum.) Robyns (synonymous to Miscanthus violaceus (K. Schum) Pilg.) were established in five different wetlands around the northern... -
Salinity tolerance of the burrowing ocypodid crab, Paratylodiplax blephariskios, in the St. Lucia and Mhlathuze estuaries, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen --- Department of Zoology, South Africa AT Forbes --- , South AfricaThe ocypodid crab, Paratylodiplax blephariskios, is endemic to the southeast coast of southern Africa where it forms an important component of the estuarine benthic fauna in muddy substrata. The St. Lucia and Mhlathuze estuaries are two of the largest estuaries... -
The toxicity of zinc to a selected macroinvertebrate, Adenophlebia auriculata (Ephemeroptera, Leptophlebiidae): method development
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: V Everitt --- Centre for Aquatic Toxicology, South Africa P-A Scherman --- Centre for Aquatic Toxicology, South Africa MH Villet --- Department of Zoology and Entomology, South AfricaThe South African water quality guidelines for the protection of the aquatic environment are constantly being updated. The Centre for Aquatic Toxicology of the Institute for Water Research, Rhodes University, uses artificial streams and toxicological methods to contribute to the... -
The effect of copper and zinc at neutral and acidic pH on the blood coagulation of Oreochromis mossambicus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Nussey --- Department of Zoology, South Africa J HJ van Vuren --- Department of Zoology, South Africa HH du Preez --- Department of Zoology, South AfricaThe effect of copper and zinc on fish blood coagulation under alkaline and acidic conditions and the possible occurrence of disseminated intravascular clotting under these conditions have been poorly studied to date. -
The effect of copper and zinc at neutral and acidic pH on the general haematology and osmoregulation of Oreochromis mossambicus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Nussey --- Department of Zoology, South Africa J HJ van Vuren --- Department of Zoology, South Africa HH du Preez --- Department of Zoology, South AfricaThe objective of this study was to determine the effect of sublethal copper and zinc concentrations at a neutral and an acidic pH, on selected haematological parameters as well as on the total osmolality and electrolyte concentrations of Oreochromis mossambicus... -
Phytoplankton and some abiotic features of El-Bardawil Lake, Sinai, Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Touliabah --- Department of Biology, Canada HM Safik --- Department of Botany, Faculty of Science, Egypt MM Gab-Allah --- Department of Botany, Faculty of Science, Egypt WD Taylor --- Department of Biology, CanadaEl-Bardawil Lake is a large coastal lagoon on the Mediterranean coast of Sinai, Egypt. Although it is shallow and oligotrophic, it is one of the most important lakes in Egypt as a source of good quality fish and a habitat... -
Population genetic structure of the sidespot barb, Barbus neefi, from the north-eastern escarpment, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GD Engelbrecht --- Discipline of Physiology, South Africa P FS Mulder --- Discipline of Physiology, South Africa JS Engelbrecht --- , South AfricaAllozyme analysis was used to determine patterns of genetic variation within and between populations of Barbus neefi. The products of 29 loci were analysed, with 17 loci being monomorphic in all populations. The genetic variability estimates compared well with values... -
A short note on factors affecting the geographic distribution of the burrowing ocypodid crab, Paratylodiplax blephariskios: temperature, habitat and competition
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen --- Department of Zoology, South AfricaThe known distribution of Paratylodiplax blephariskios extends from the Morrumbene estuary in Mozambique to the Mngazana estuary in the Eastern Cape. Laboratory data on the temperature tolerance of P. blephariskios indicated that the crab could survive temperatures between 12.5°C and... -
Alien and invasive fresh water Gastropoda in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CC Appleton --- , South AfricaTen species of freshwater gastropod have been introduced into South Africa, mostly through the aquarium trade. Two of these, Lymnaea columella (Lymnaeidae) and Physa acuta (Physidae), have been invasive in river systems across the country for many years, probably since... -
Bacterial levels in the Nyl River system, Limpopo province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Greenfield --- Centre for Aquatic Research, Department of Zoology, South Africa JHJ van Vuren --- Centre for Aquatic Research, Department of Zoology, South Africa V Wepener --- Centre for Aquatic Research, Department of Zoology, South AfricaBecause water quantity and quality are of great importance in the arid Limpopo province, the bacterial content of water in the Nyl River System and its possible origins were assessed at five sites. Quarterly surveys took place between April 2001... -
Biodiversity and extracellular enzymatic activity of heterotrophic bacterial communities in Bardawil Lagoon, Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Bahgat --- Department of Botany, Faculty of Sciences, Egypt A Dewedar --- Department of Botany, Faculty of Sciences, Egypt HM Shafik --- Department of Botany, Faculty of Sciences, Egypt EE Shabana --- Department of Botany, Faculty of Sciences, EgyptThe biodiversity of heterotrophic viable bacteria (209 isolates) in the hypersaline Bardawil Lagoon, Egypt, was studied. Composition and extracellular activities of viable culturable heterotrophic bacteria (VCHB) in the water and in non-colonised and seagrass-colonised sediments of Bardawil Lagoon were determined... -
Benthic macrofauna community composition, abundance and distribution in the Tanzanian and Ugandan inshore and offshore waters of Lake Victoria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GW Ngupula --- , Tanzania R Kayanda --- , TanzaniaBenthic macroinvertebrate community composition was investigated in 2008 at 55 stations at various depths in the nearshore and offshore waters of Lake Victoria, in relation to dissolved oxygen, pH, temperature, chlorophyll a and conductivity. Macroinvertebrate abundance was higher in the... -
A laboratory assessment of the potential molluscicidal activity of some Nigerian plant species used as anthelmintics
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AA Adenusi --- Parasitology Unit, Department of Plant Science and Applied Zoology, Nigeria AB Odaibo --- Department of Zoology, NigeriaLaboratory studies were conducted to determine the potential molluscicidal activity of five Nigerian plant species used in alternative medicine practice as anthelmintics. Laboratory-bred adult Biomphalaria pfeifferi, the snail host of Schistosoma mansoni in Nigeria, and their viable 0- to 24-hour-old... -
Temporal and spatial variability in macroinvertebrate community structure in relation to environmental variables in Ajijiguan Creek, Niger Delta, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FO Arimoro --- , South Africa RB Ikomi --- Department of Animal and Environmental Biology, Nigeria IO Ajuzieogu --- Department of Animal and Environmental Biology, Nigeria FO Nwadukwe --- Department of Animal and Environmental Biology, NigeriaVariations in macrobenthic community structure in time and space along a pollution gradient were examined in a small Niger Delta creek in 2006–2007. Salinity fluctuated between fresh and mesohaline conditions with values ranging from 0.4 to 5.2, and conductivity ranged... -
Phytoplankton responses to changes in macrophyte density in a tropical artificial pond in Zaria, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AM Chia --- Department of Biological Sciences, Nigeria DN Iortsuun --- Department of Biological Sciences, Nigeria BJ Stephen --- Department of Biological Sciences, Nigeria AE Ayobamire --- Department of Biological Sciences, Nigeria Z Ladan --- , NigeriaThe response of phytoplankton population dynamics to changes in densities of Nymphaea lotus L. and Polygonum limbatum Meisn. was studied in an artificial pond in Zaria, Nigeria, from June to November 2007. Antagonistic effects of these macrophytes on Netrium sp.,... -
Fatty acids of polar lipids in heart tissue are good taxonomic markers for tropical African freshwater fish
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: J Kwetegyeka --- Department of Chemistry, Uganda J Masa --- Department of Chemistry, Uganda BT Kiremire --- Department of Chemistry, Uganda GB Mpango --- Department of Chemistry, Uganda O Grahl-Nielsen --- Department of Chemistry, NorwayThe fatty acid profiles in total, neutral and polar lipids in the heart tissues of five freshwater fish species (Nile perch Lates niloticus, Nile tilapia Oreochromis niloticus, marbled lungfish Protopterus aethiopicus, Bagrus docmak and African catfish Clarias gariepinus) from Lakes... -
Reeds as indicators of nutrient enrichment in a small temporarily open/ closed South African estuary
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LRD Human --- Department of Botany, South Africa JB AdamsThis study investigated the use of δ15N levels in Phragmites australis reeds as an indicator of nutrient input into the small temporarily open/closed East Kleinemonde Estuary, Eastern Cape, South Africa. Nutrient (NH4 and SRP) concentrations decreased from the bank towards... -
Spatial and temporal patterns of phytoplankton abundance and composition in three ecological zones in the Tanzanian waters of Lake Victoria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GW Ngupula --- , Tanzania ASE Mbonde --- , Tanzania CN Ezekiel --- , TanzaniaPhytoplankton abundance and composition in relation to physico-chemical parameters were investigated from September 2005 to October 2007 at 51 stations of various depths in the nearshore, intermediate and deep offshore waters of Lake Victoria. Shallow nearshore waters had the highest... -
Freshwater scaled chrysophytes, heliozoa and thaumatomonad flagellates from Edo State, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DE Wujek --- Department of Biology, USA MO Kadiri --- Department of Plant Biology and Biotechnology, Nigeria RM Dziedzic --- Department of Biology, USAA total of nine silica-scaled chrysophytes (Chrysophyceae: two species each in Spiniferomonas and Paraphysomonas; Synurophyceae: five Mallomonas species), 16 heliozoa, and two scaled flagellates were recorded from 19 samples collected from Edo State, Nigeria, over a period covering both dry... -
Impact of drain water on water quality and eutrophication status of Lake Burullus, Egypt, a southern Mediterranean lagoon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EM Ali --- Department of Environmental Sciences, EgyptThe ecological and biological status of Lake Burullus was examined in 2006 to determine its water quality and eutrophication status in response to the quality and quantity of drain water entering it. The lake suffers from excessive nutrient concentrations. Chlorophyll... -
A comparative assessment of the health status of feral populations of Clarias gariepinus from three dams in the Limpopo and Olifants river systems, Limpopo province, South Africa, using the fish health assessment index protocol
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GN Madanire-Moyo --- Department of Biodiversity, South Africa WJ Luus-Powell --- Department of Biodiversity, South Africa A Jooste --- Department of Biodiversity, South Africa PAS Olivier --- Department of Biodiversity, South AfricaAn evaluation of the health status of feral populations of the freshwater catfish Clarias gariepinus was carried out between 2009 and 2010 at three dams in the Limpopo and Olifants river systems with varying levels of human impact. Fish health... -
Ecophysiological responses of the salt marsh grass Spartina maritima to salinity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Naidoo --- School of Biological and Conservation Sciences, South Africa Y Naidoo --- School of Biological and Conservation Sciences, South Africa P Achar --- Department of Biological and Physical Sciences, USAThe effects of salinity on growth and productivity of Spartina maritima (Curtis) Fernald were investigated in glasshouse and field experiments in 2008. In the glasshouse study, plants were subjected to 2%, 10%, 20%, 40% and 80% sea water, with tidal... -
The influence of pool size on species diversity and water chemistry in temporary rock pools on Domboshawa Mountain, northern Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Anusa --- Tropical Resources Ecology Programme (TREP), Department of Biological Sciences, Zimbabwe HGT Ndagurwa --- Tropical Resources Ecology Programme (TREP), Department of Biological Sciences, Zimbabwe CHD Magadza --- Tropical Resources Ecology Programme (TREP), Department of Biological Sciences, ZimbabweThe effect of pool size (area and depth) on species diversity and physicochemical characteristics of rock pool habitats on Domboshawa Mountain, northern Zimbabwe, was studied from December 2006 to May 2007. Pools were categorised based on maximum depth. Pool duration... -
Influence of waterfalls on patterns of association between trout and Natal cascade frog Hadromophryne natalensis tadpoles in two headwater streams in the uKhahlamba Drakensberg Park World Heritage Site, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RJ Karssing --- , South Africa NA Rivers-Moore --- , South Africa K Slater --- Department of Environmental Sciences, South AfricaCurrent literature suggests that little, if any, research has been conducted in South Africa to determine the impact of alien trout on indigenous amphibian biodiversity. The aim of this study was to establish whether waterfalls in the uKhahlamba Drakensberg Park,... -
Zooplankton abundance and composition in the hypertrophic Rietvlei Dam, South Africa, negate prospects for its remedial ‘top-down’ biomanipulation
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RC Hart --- School of Life Sciences, South AfricaCrustacean zooplankton abundance and composition were determined at one offshore and three nearshore sites in the hypertrophic Rietvlei Dam on 19 dates between July 2009 and December 2011. Total biomass fluctuated seasonally, generally declining from spring to winter through the... -
Activity and feeding of Dotilla fenestrata (Brachyura: Ocypodidae) in a warm, temperate South African estuary
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Bulcao --- Department of Zoology and Entomology, South Africa AN Hodgson --- Department of Zoology and Entomology, South AfricaThe activity of and consumption of organic material by the sand-bubbler crab Dotilla fenestrata was studied over neap and spring tides on a sheltered sand bank close to the mouth of the warm, temperate Kowie Estuary, South Africa. Crabs emerged... -
A preliminary survey of biotic composition of the Olifantspruit catchment, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ZCC Khoza --- Department of Biodiversity, South Africa MJ Potgieter --- Department of Biodiversity, South Africa W Vlok --- Department of Zoology, South AfricaAs a major tributary of the Nyl River, and ultimately for the Nylsvley wetland, the Olifantspruit, Limpopo province, South Africa, was investigated during the summer (high flow) and winter (low flow) of 2007 at three sites. This preliminary study used... -
Enzymatic activities as potential stress biomarkers of two substituted benzene compounds in Propsilocerus akamusi (Diptera: Chironomidae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CW Cao --- Department of Forest Protection, People's Republic of China XP Li --- Department of Forest Protection, People's Republic of China SL Ge --- Department of Forest Protection, People's Republic of China LL Sun --- Department of Forest Protection, People's Republic of China ZY Wang --- Department of Forest Protection, People's Republic of ChinaChironomids are a globally distributed family of insects that can serve as biological indicators of environmental pollution. Substituted benzenes are a group of serious environmental pollutants and severely threaten biological and human health. In order to investigate potential stress biomarkers... -
Turnover patterns in fish versus macroinvertebrates — implications for conservation planning
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- School of Agricultural, Earth and Environmental Sciences, South AfricaSpatial patterns in taxonomic richness and turnover for fish and aquatic macroinvertebrates are compared to assess the relative usefulness of each taxonomic group in mapping biodiversity patterns. Fish and aquatic macroinvertebrate species data for sites down the longitudinal axes of... -
Physical and chemical characteristics of the Tanzanian inshore and offshore waters of Lake Victoria in 2005–2008
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GW Ngupula --- , Tanzania CN Ezekiel --- , Tanzania IA Kimirei --- , Tanzania E Mboni --- , Tanzania BB Kashindye --- , TanzaniaAssuming that the inshore and offshore waters of Lake Victoria are impacted differently by human activities in its catchment, this study investigated the water quality dynamics of the lake. A total of 29 stations were sampled in 2005–2008 for dissolved... -
Body-size distribution, biomass estimates and life histories of common insect taxa associated with a submerged macrophyte Lagarosiphon ilicifolius in the Sanyati Basin, Lake Kariba, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Phiri --- , Zimbabwe A Chakona --- Department of Ichthyology and Fisheries Science, South Africa JA Day --- Freshwater Research Unit, Zoology Department, South AfricaThe body-size distributions and biomass estimates of Caenis (Ephemeroptera: Caenidae), Cloeon (Ephemeroptera: Baetidae), Coenagrionidae (Odonata), Micronecta (Hemiptera: Corixidae), Chironominae (Diptera: Chironomidae) and Orthocladiinae (Diptera: Chironomidae), the most common and abundant insect taxa associated with a submerged macrophyte Lagarosiphon ilicifolius in... -
Spatio-temporal variability of surface water quality parameters in a South African estuarine lake system
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IA Russell --- , South AfricaLong-term (20+ years) water quality datasets for estuaries are rare, especially for smaller systems. Monitoring of salinity, temperature, pH, dissolved oxygen and turbidity has been undertaken since 1991 in the intensively utilised, modified, and managed temporarily open/closed Touw Estuary and... -
Recovery dynamics of zooplankton following mouth-breaching in the temporarily open/closed Mdloti Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Deale --- School of Life Sciences, South Africa R Perissinotto --- School of Life Sciences, South Africa NK Carrasco --- School of Life Sciences, South AfricaMouth-breaching events have major impacts on biological processes in temporarily open/closed estuaries. The aim of this investigation was to monitor zooplankton recovery dynamics following artificial breaching of the Mdloti Estuary in February 2004. Spatial and temporal patterns in zooplankton distribution... -
A comparison of diel feeding pattern, ingestion and digestive efficiency of Oreochromis niloticus and Oreochromis macrochir in Lake Chivero, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LT Marufu --- Department of Biological Sciences, Zimbabwe PC Chifamba --- Department of Biological Sciences, ZimbabwePossible reasons why Oreochromis niloticus have supplanted Oreochromis macrochir as the main commercial fish species in Lake Chivero, Zimbabwe, were investigated in 2006. Diel feeding trends, daily food consumption and protein digestion efficiencies of the two species were compared. Both... -
Health of sharptooth catfish Clarias gariepinus in Pongolapoort Dam, South Africa: a comprehensive study
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: KJ McHugh --- Centre for Aquatic Research, South Africa NJ Smit --- Water Research Group (Ecology), Unit for Environmental Sciences and Management, South Africa JHJ van Vuren --- Centre for Aquatic Research, South Africa JC van Dyk --- Centre for Aquatic Research, South AfricaA histology-based fish health assessment protocol was used in 2009–2010 to assess the health status of Clarias gariepinus from Pongolapoort Dam, South Africa. Nineteen fish were collected by angling. The histology of liver, kidney, gills and testes or ovaries was... -
Phenotypic characterisation in interspecific and intergeneric hybrids of the clariid catfishes Heterobranchus longifilis, Clarias gariepinus and Clarias anguillaris in Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AA Akinwande --- Department of Fisheries Technology, Nigeria OA Fagbenro --- Department of Fisheries and Aquaculture, Nigeria OT Adebayo --- Department of Fisheries and Aquaculture, NigeriaThirty-nine morphometric and five meristic comparisons were carried out on 12-month-old interspecific and intergeneric hybrids of the African clariid catfishes Heterobranchus longifilis, Clarias gariepinus and Clarias anguillaris from experimental earthen ponds in Nigeria. Canonical discriminant analysis accounted for 89.4% of... -
Controls on the formation of Wakkerstroom Vlei, Mpumalanga province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Joubert --- Department of Environmental Science, South Africa WN Ellery --- Department of Environmental Science, South AfricaThe present study investigated controls on the formation of Wakkerstroom Vlei, an ∼1 000 ha unchannelled valley-bottom wetland on the South African Highveld. Along the uppermost and lowermost reaches of the wetland, where dolerite outcrops occur along the main valley,... -
An integrated remote sampling approach for aquatic invertebrates associated with submerged macrophytes
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PSR Weyl --- Department of Zoology and Entomology, South Africa JA Coetzee --- Department of Zoology and Entomology, South AfricaA sampling method and apparatus for collecting meaningful and quantifiable samples of aquatic macroinvertebrates, and the macrophytes they are associated with, are presented. Where physical danger from wildlife is a significant factor, especially in Africa, this apparatus offers some safety... -
Seasonal occurrence, distribution and diversity of phytoplankton in the Douala Estuary, Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AB Fonge --- Department of Botany and Plant Physiology, Cameroon BG Chuyong --- Department of Botany and Plant Physiology, Cameroon AS Tening --- Department of Chemistry, Cameroon AC Fobid --- Department of Botany and Plant Physiology, Cameroon NF Numbisi --- Department of Botany and Plant Physiology, CameroonThe occurrence and abundance of phytoplankton in the Wouri and Dibamba rivers and the Douala Estuary and their relationships to physico-chemical conditions were studied during the wet and dry seasons of 2008. One-hundred-and-sixty-eight species belonging to 67 genera were identified... -
Patterns of microbial activity in the shallow bottom sediments of Lake Manzala, Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Bahgat --- Botany Department, Egypt FM El Fawal --- Geology Department, Egypt F Al-Misned --- Department of Zoology, College of Sciences, Saudi Arabia HA El-Serehy --- Department of Zoology, College of Sciences, Saudi Arabia S Shaheen --- Geology Department, EgyptGeneral microbial activity, determined by hydrolysis of fluoresceine diacetate (FDA), was investigated in two sediment cores collected from Manzala Lake during November 2011. FDA hydrolysis positively correlated with total bacterial counts, bacterial biomass and chlorophyll a in both cores. The... -
Toxicity of the chlorpyrifos-based pesticide Termifos®: effects on behaviour and biochemical and haematological parameters of African catfish Clarias gariepinus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CD Nwani --- Department of Zoology and Environmental Biology, Nigeria DO Ugwu --- Department of Zoology and Environmental Biology, Nigeria OC Okeke --- Department of Zoology and Environmental Biology, Nigeria GC Onyishi --- Department of Zoology and Environmental Biology, Nigeria FN Ekeh --- Department of Zoology and Environmental Biology, Nigeria C Atama --- Department of Zoology and Environmental Biology, Nigeria LO Eneje --- Department of Applied Microbiology and Brewing, NigeriaThe present study, conducted in 2012, determined the toxicity of the chlorpyrifos-based pesticide Termifos® and its effects on behaviour and biochemical and haematological parameters in juvenile African catfish Clarias gariepinus. The 96 h LC50, estimated by probit analysis in a... -
Mitochondrial and nuclear DNA reveals a complete lineage sorting of Glossogobius callidus (Teleostei: Gobiidae) in southern Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PA Maake --- South African Institute for Aquatic Biodiversity, South Africa M Mwale --- South African Institute for Aquatic Biodiversity, South Africa SM Dippenaar --- Department of Biodiversity, South Africa O Gon --- South African Institute for Aquatic Biodiversity, South AfricaGlossogobius callidus exhibits broad salinity tolerance and is distributed in both estuarine and freshwater environments in southern Africa. Previous studies revealed substantial morphological and molecular variation among populations, suggesting they constitute a species complex. The present study utilised phylogenetic and... -
Feeding selectivity of wild and pond-cultured Nile tilapia Oreochromis niloticus in the Lake Victoria basin in Mara, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Rumisha --- Department of Biological Sciences, Tanzania A Nehemia --- Department of Biological Sciences, TanzaniaA comparison of feeding selectivity of wild and pond-cultured Nile tilapia Oreochromis niloticus was conducted in 2008. Water and fish samples were collected in Shirati Bay, Lake Victoria, and from fish ponds in Tarime district using a La Motte water... -
Temporal variations in the food habits of some fish species in Lake Nokoué, Benin
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: P Gnohossou --- Laboratoire d’Hydrobiologie et Aquaculture, Bénin P Lalèyè --- Laboratoire d’Hydrobiologie et Aquaculture, Bénin P Atachi --- Laboratoire d’Hydrobiologie et Aquaculture, Bénin G Magali --- Laboratoire EcoLab, UMR 5245 CNRS-UPS-INPT, France MC Villanueva --- Laboratoire d’Agronomie, Environnement et Écotoxicologie, France J Moreau --- Laboratoire d’Agronomie, Environnement et Écotoxicologie, FranceStomach contents of the 12 most abundant fish species in Lake Nokoué, Benin, collected between 2003 and 2005, were analysed for temporal variations in their diet. Several species showed seasonal shifts in their diets based on benthic prey abundance and... -
Variations and changes in habitat, productivity, composition of aquatic biota and fisheries of the Kyoga lake system: lessons for management
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Ogutu-Ohwayo --- National Fisheries Resources Research Institute, Uganda K Odongkara --- National Fisheries Resources Research Institute, Uganda W Okello --- National Fisheries Resources Research Institute, Uganda D Mbabazi --- National Fisheries Resources Research Institute, Uganda SB Wandera --- National Fisheries Resources Research Institute, Uganda LM Ndawula --- National Fisheries Resources Research Institute, Uganda V Natugonza --- National Fisheries Resources Research Institute, UgandaThe Kyoga lake system, which is c. 4 m deep, originally had a diverse fish fauna, extensive macrophytes and wetlands. Most (82%) of its water comes from Lake Victoria, is controlled through three dams and has a short residence time... -
Effects of water quality changes on phytoplankton and lesser flamingo Phoeniconaias minor populations at Kamfers Dam, a saline wetland near Kimberley, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LM Hill --- School of Agricultural, Forest and Environmental Sciences, USA WW Bowerman --- University of Maryland, USA JC Roos --- Water Quality Consultants, South Africa WC Bridges --- Department of Mathematical Sciences, USA MD Anderson --- BirdLife South Africa, South AfricaKamfers Dam, a wetland near Kimberley, South Africa, supports a population of Near Threatened lesser flamingos Phoeniconaias minor. The cyanobacterium Arthrospira fusiformis (Voronikhin) Komarek and Lund 1990, the flamingos’ food source, was in bloom in April 2009. The city's wastewater... -
Estimating population size of Saddle-billed Storks Ephippiorhynchus senegalensis in southern Kruger National Park, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Marcelle van den Hoven --- Endangered Wildlife Trust, South Africa Brian Reilly --- Department of Nature Conservation, South AfricaCounting Saddle-billed Storks in a study area the size of the Kruger National Park, at 2.2 million ha, is difficult because the birds are long-lived, sparse in the landscape and have large home ranges. Aerial surveys conducted to date provide... -
Morphometric sexing of Mediterranean Yellow-legged Gulls Larus michahellis michahellis breeding in the Gulf of Gabès, southern Tunisia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abdessalem Hammouda --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, Tunisia Slaheddine Selmi --- Département des Sciences de la Vie, Faculté des Sciences de Gabès, TunisiaDiscriminant analysis functions have previously been determined for sexing Mediterranean Yellow-legged Gulls Larus michahellis michahellis from the western Mediterranean basin. However, data from eastern Mediterranean populations are lacking. In this work, we used morphometric data from a sample of 81... -
MICROCRYSTALLINE CELLULOSE POWDERS, PROPERTIES AND POSSIBLE APPLICATIONS IN NUTRITION
Item type: Journal Article • Journal: South African Forestry Journal • Authors: H. Steege B. Phillipp R.E. Nest G. Magister H.J. Lewerenz D. Bleyl Reeves -
Fire and Senescent Fynbos in the Swartberg, Southern Cape
Item type: Journal Article • Journal: South African Forestry Journal • Authors: W. Bond --- ,Some consequences of long intervals between fires were studied in fynbos of the Swartberg Mountains. Results showed that foliage projective cover was less patchy and mostly denser in mature than in senescent regrowth. Proteaceae seedling regeneration was significantly reduced in... -
Prunus africana in the Bloukrans River Gorge, Southern Cape
Item type: Journal Article • Journal: South African Forestry Journal • Authors: C.J. Geldenhuys --- George Department of Water Affairs, Forestry and Environmental Conservation,The decline of Prunus africana in the most southern end of its distribution is attributed to unsuitable establishment conditions for the seedlings and adverse climatic conditions. Only 43 trees ≥ 10 cm D.B.H. occur 47% of which are dead. The... -
The Structure of Cellulose by Conformational Analysis.
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. Pizzi --- , N. Eaton --- ,Conformational analysis studies on the tertiary structure of cellobiose and methyl-β-cellobioside were carried out by using calculations of Van der Waals, H-bond, electrostatic and torsional energy interactions between the atoms and groups of the molecules. Energy maps in function of... -
The Structure of Cellulose by Conformational Analysis.
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. Pizzi --- Council for Scientific and Industrial Research, South Africa N. Eaton --- Council for Scientific and Industrial Research, South AfricaThe Meyer/Misch and related models were found to be the most energetically stable for the crystalline structure of cellulose I. The cellobioside structure is the monomer of cellulose I as structures having cellobiose as monomer have been proven to be... -
CCA—treated Laminated Railway Sleepers and Telephone Cross-arms
Item type: Journal Article • Journal: South African Forestry Journal • Authors: W.E. Conradie --- Council for Scientific and Industrial Research,A non-conventional process for the manufacturing of laminated pine railway sleepers and telephone cross-arms, involving the treatment of laminations with copper-chrome-arsenic (CCA) preservatives before gluing and assembly, was investigated. -
Some Fungal Symbionts of Ectotrophic Mycorrhizae of Pines in South Africa
Item type: Journal Article • Journal: South African Forestry Journal • Authors: G. C.A. van der Westhuizen --- Departement of Botany, A. Eicker --- Departement of Botany,Earlier research of mycorrhiza of pines in South Africa is reviewed. Twenty-one species of Basidiomycetes which are considered to be obligate symbionts of mycorrhizae of pines, were found in four major pine-growing areas of South Africa. These include 10 Agaricales,... -
Is caudal fin colour in tigerfish Hydrocynus vittatus a sex or population trait?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Soekoe --- Centre for Aquatic Research, Department of Zoology, South Africa FH van der Bank --- African Centre for DNA Barcoding, Department of Zoology, South Africa NJ Smit --- Water Research Group (Ecology), Unit for Environmental Sciences and Management, Potchefstroom Campus, South AfricaTigerfish caudal fin colours vary from yellow to red, with distinct dissimilarities previously noted. To understand these colour differences, tigerfish were collected during 2008 to 2010 from four southern African populations in the Upper Zambezi River (ZAM), Okavango Delta (OKA),... -
Could phosphorus concentrations increase with the development of cage culture in Lake Kariba, Zimbabwe?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mhlanga --- Department of Biological Sciences, Zimbabwe W Mhlanga --- Department of Environmental Science, Zimbabwe P Mwera --- Lake Harvest, Zimbabwe P Tendaupenyu --- Department of Biological Sciences, ZimbabweA comparison between historical and current data was done to determine whether the concentrations of total phosphorus, orthophosphate and chlorophyll a, and Secchi disc transparency, have changed in the Sanyati Basin of Lake Kariba following the commencement of cage culture... -
Phytoplankton community and physico-chemical seasonality and changes in Lake Hora-Kilole, Ethiopia, a tropical crater lake
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Abate --- Fisheries and Aquatic Sciences Stream, Department of Zoological Sciences, Ethiopia D Kifle --- Fisheries and Aquatic Sciences Stream, Department of Zoological Sciences, Ethiopia B Lemma --- Fisheries and Aquatic Sciences Stream, Department of Zoological Sciences, Ethiopia YH Gao --- School of Life Sciences, ChinaPhytoplankton community structure and physico-chemical variables, sampled monthly at an offshore station in Lake Hora-Kilole from August 2007 to May 2008, were compared with previously reported data. In 1989 the Mojo River was temporarily diverted to flow into the lake... -
Detection of land cover changes around Lake Mutirikwi, Zimbabwe, based on traditional remote sensing image classification techniques
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Dube --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa W Gumindoga --- Department of Civil Engineering, Zimbabwe M Chawira --- Zimbabwe Environmental Law Association, ZimbabweLand cover changes around Lake Mutirikwi in 1984–2011 were mapped from Landsat images using traditional image classification methods including the maximum likelihood classifier algorithm. The possibility of mapping the coverage and abundance of surface floating aquatic weeds was also tested... -
Spatial quality improvement of a toxic industrial effluent, based on physico-chemistry, algal community changes and algal bioassay
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MI Abdel-Hamid --- Botany Department, Egypt EI Abdel-Aal --- Botany Department, Egypt YA Azzab --- Botany Department, EgyptSpatial recovery of a highly alkaline and ammonia-rich industrial effluent was assessed along a wastewater receiving drain near Mansoura City in 2006. Spatial changes in physico-chemical characteristics and water quality index indicated a progressive downstream improvement of wastewater quality, and... -
Spatial distribution of soluble reactive silica (SRSi) in the Tanzanian waters of Lake Victoria and its implications for diatom productivity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GW Ngupula --- Tanzania Fisheries Research Institute, Tanzania CN Ezekiel --- Tanzania Fisheries Research Institute, Tanzania ASE Mbonde --- Tanzania Fisheries Research Institute, Tanzania B Kashindye --- Tanzania Fisheries Research Institute, Tanzania E Mboni --- Tanzania Fisheries Research Institute, TanzaniaSoluble reactive silica (SRSi) concentrations and diatom abundance were determined during four surveys in the Tanzanian waters of Lake Victoria between 2005 and 2008. The SRSi concentrations increased towards offshore sites, while the opposite was true for diatom abundance. The... -
CHLOROPHYLL-a CONCENTRATION IN THE LOWER KAFUE RIVER AND CHONGWE RIVER BASINS
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: Petr Obrdlik --- , Federal Republic of GermanyThe concentration of chlorophyll a was measured in the warm monomictic impoundment, Itezhi-tezhí Lake ([xbar] = 2,00 mg m−3); in the small, slightly polluted Chongwe Dam ([xbar] = 11,0 mg m−3); and in the temporary Mungasiya River ([xbar] = 53,4... -
ZOOPLANKTON AND ESTUARINE RELICT (BENTHIC) FAUNA IN LAKE MZINGAZI, A FRESHWATER COASTAL LAKE OF NATAL
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: B.K. Fowles --- , South Africa C. G.M. Archibald --- , South AfricaLake Mzingazi, a natural, undisturbed freshwater coastal lake in the heart of the Richards Bay municipal area, is threatened by rapid urban and industrial growth. The previously unrecorded composition and distribution of zooplankton in the lake was studied during 1979... -
COUNTING NATURAL POPULATIONS OF MICROCYSTIS AERUGINOSA: A SIMPLE METHOD FOR COLONY DISRUPTION INTO SINGLE CELLS AND ITS EFFECT ON CELL COUNTS OF OTHER SPECIES
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: Tamar Zohary --- , ArcangelaM. Pais Madeira --- ,A rapid, high-speed blending method for disrupting colonies of the cyanobacterium Microcystis aeruginosa to single cells in preparation for cell counts is described. Cell counts obtained for treated samples of natural populations of M. aeruginosa from Hartbeespoort Dam did not... -
DEVELOPMENT AND USE OF ZOOPLANKTON LENGTH—FILTRATION RATE RELATIONSHIPS FOR ESTIMATING PHYTOPLANKTON GRAZING LOSSES
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: AndrewC. Jarvis --- ,Water quality is impaired by high chlorophyll concentrations. Limitation of algal stocks by high zooplankton grazing is an important component in many lake ecosystems and models. Measurement of grazing rates is labour intensive, expensive and requires specialized skills. This paper... -
LIMNOLOGICAL SOCIETY OF SOUTHERN AFRICA 25th ANNIVERSARY CONGRESS
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: -
THE USE OF TROFIC AS AN AID FOR THE MANAGEMENT OF EUTROPHIC LAKES
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: K. Clarke --- , A.C. Jarvis --- , P.J. Ashton --- , T. Zohary --- ,As a result of eutrophication studies that have been performed by the National Institute for Water Research for many years it was decided in 1980 that a detailed investigation into this area take place. Hypertrophic Hartbeespoort Dam was selected as... -
APPLICATION OF LAVSOE, AN EUTROPHICATION MODEL, TO BLOEMHOF DAM
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: J.N. Rossouw --- ,In 1985 the Department of Water Affairs introduced an effluent phosphate standard of 1 mg l−1 (as P) in seven potentially sensitive catchments. Although this is an uniform standard, permits can be granted for effluents to exceed the standard in... -
FUTURE CHALLENGES IN WATER QUALITY MODELLING WITH PARTICULAR REFERENCE TO OPERATIONALLY CLOSED CATCHMENTS
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: S.F. Forster --- Department of Water Affairs, South Africa F.A. Stoffberg --- Department of Water Affairs, South Africa J.A. van Rooyen --- Department of Water Affairs, South AfricaAs a result of the declining quality of many water sources, the use of water quality models in planning is increasing. To date applications have involved the simulation of total dissolved salts and nutrients, largely in catchments affected by urban... -
Physical Factors Regulating Macrobenthic Community Structure on a South African Estuarine Flood-tidal Delta
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M. L. Bursey T. H. WooldridgeMultivariate techniques were used to identify environmental parameters affecting macrobenthic communities on the flood-tidal delta of the Nahoon Estuary and adjacent beach near East London on the south-east coast of South Africa. Water content of sediments, temperature and exposure were... -
Climatology and Variability of Sea Surface Temperature and Surface Chlorophyll in the Benguela and Agulhas Ecosystems As Observed by Satellite Imagery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H. Demarcq R. G. Barlow F. A. ShillingtonA climatology of satellite-derived sea surface semperature (SST) and surface chlorophyll a concentration (Chl), and their associated variability at time-scales from weeks to years, was constructed for the Benguela and Agulhas ecosystems. Global area coverage data at 4.5 km spatial... -
Records of the Subantarctic Fur Seal Arctocephalus Tropicalis from Rodrigues and Mauritius, Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J. H. M. David L. SalmonA juvenile Subantarctic fur seal Arctocephalus tropicalis was recorded on the Indian Ocean island of Rodrigues and two were seen on Mauritius. These records are at least 2 500 km from the closest breeding colony (Amsterdam Island) and are the... -
Population of the Macaroni Penguin Eudyptes Chrysolophus at Marion Island, 1994/95–2002/03, with Information on Breeding and Diet
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford J. Cooper B. M. DyerThere is indication that numbers of macaroni penguins Eudyptes chrysolophus at subantarctic Marion Island have decreased since the early 1980s. Estimates of the population at the island fell from about 405 000 pairs in 1983/84 and 434 000 pairs in... -
Population, Breeding, Diet and Conservation of the Crozet Shag Phalacrocorax [atriceps] Melanogenis at Marion Island, 1994/95–2002/03
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford J. Cooper B. M. Dyer A. C. Wolfaardt D. Tshingana K. Spencer S. L. Petersen J. L. Nel D. G. Keith C. L. Holness B. Hanise M. D. Greyling M. Du ToitThe number of Crozet shags or cormorants Phalacrocorax [atriceps] melanogenis breeding at subantarctic Marion Island decreased by 68% from 841 pairs in 1994/95 to 272 pairs in 2002/03. The mean number of pairs at colonies also decreased and was significantly... -
Population Numbers of Fur Seals at Prince Edward Island, Southern Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M. N. Bester P. G. Ryan B. M. DyerDuring the period 17–22 December 2001, the onshore distribution and the abundance of Antarctic fur seals Arctocephalus gazella and Subantarctic fur seals A. tropicalis were determined for Prince Edward Island. Two breeding colonies of Antarctic fur seals were located on... -
Simulations of fishing effects on the southern Benguela fish community using an individual-based model: learning from a comparison with ECOSIM
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Y-J. Shin L. J. Shannon P. M. CuryBy applying an individual-based model (OSMOSE) to the southern Benguela ecosystem, a multispecies analysis is proposed, complementary to that provided by the application of ECOPATH/ECOSIM models. To reconstruct marine foodwebs, OSMOSE is based on the hypothesis that predation is a... -
Distribution patterns of key fish species of the southern Benguela ecosystem: an approach combining fishery-dependent and fishery-independent data
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L. Pecquerie L. Drapeau P. Fréon J. C. Coetzee R. W. Leslie M. H. GriffithsWithin the context of an ecosystem approach for fisheries, there is a need for quantitative information on distributions of key marine species. This information is valuable input for modelling species interactions in the southern Benguela ecosystem. In the present study,... -
Quantification and representation of potential spatial interactions in the southern Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L. Drapeau L. Pecquerie P. Fréon L. J. ShannonThis work explores the potential spatial interactions between 13 key commercial species of the southern Benguela ecosystem: sardine Sardinops sagax, anchovy Engraulis encrasicolus, round herring Etrumeus whiteheadi, horse mackerel Trachurus trachurus capensis, chub mackerel Scomber japonicus, chokka squid Loligo vulgaris... -
Identity and distribution of southern African sciaenid fish species of the genus Umbrina
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Hutchings MH GriffithsTwo Umbrina species, U. canariensis Valenciennes 1843 and U. robinsoni Gilchrist and Thompson 1908, are recognised from southern Africa. The latter species was hitherto believed to be a synonym of Umbrina ronchus Valenciennes 1843 (type locality Canary Islands). U. canariensis... -
Biogeographic patterns in rocky intertidal communities in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KJ Sink GM Branch JM HarrisOn the east coast of southern Africa, marine biogeographic boundaries have previously been unresolved. This paper analyses large-scale patterns of community structure of rocky intertidal shores along the whole of the KwaZulu-Natal coast, based on abundance data covering 220 macroalgal... -
Gracilarioid species (Gracilariaceae, Rhodophyta) in southern Africa, with a description of Gracilariopsis funicularis sp. nov.
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Iyer JJ Bolton VE CoyneSouthern African gracilarioids have previously been assigned to Gracilaria gracilis and Gracilariopsis lemaneiformis. Recent molecular evidence indicates that at least three gracilarioid species, G. gracilis, Gracilariopsis longissima and an undescribed Gracilariopsis species occur in this region. The main economic species... -
Epipelagic siphonophores off the east coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Thibault-Botha MJ GibbonsThis work represents the first systematic analysis of the common Siphonophora from the Agulhas Current (South-West Indian Ocean). A total of 56 species of siphonophores was collected from a series of three largely epipelagic cruises between Algoa Bay and the... -
The biology and distribution of the monkfish Lophius vomerinus off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SA Walmsley RW Leslie WHH SauerThe monkfish Lophius vomerinus is economically the most important bycatch species in the South African demersal hake fishery. To assist in the development of a bycatch management plan for the species, age and growth characteristics, reproductive and feeding biology, and... -
Distribution of nutrients, chlorophyll and phytoplankton primary production in relation to hydrographic structures bordering the Benguela-Angolan frontal region
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Wasmund H-U Lass G NauschThe aim of this study was to determine the characteristic rates of phytoplankton production in water bodies bordering the Benguela-Angolan frontal region and differing in their hydrographic, hydrochemical and biological properties. Two cruises were undertaken in the vicinity of the... -
Patterns of immigration to and emigration from breeding colonies by African penguins
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PA Whittington RM Randall RJM Crawford AC Wolfaardt NTW Klages BM Randall PA Bartlett YJ Chesselet R JonesOf over 20 000 African penguins Spheniscus demersus that had been flipper-banded as chicks between 1978 and 1999, 2% of those re-sighted after fledging settled to breed at non-natal colonies. This represented 14% of the banded birds that were subsequently... -
Preliminary documentation and assessment of fish diversity in sub-Saharan African estuaries
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AK WhitfieldLists of indigenous fish species sampled in cool-temperate, warm-temperate, subtropical and tropical estuaries in sub-Saharan Africa were compiled from both published and unpublished data. Comparisons were conducted at the species and family level between the fish assemblages recorded in the... -
Aspects of the reproductive biology of monkfish Lophius vomerinus off Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Maartens AJ BoothAspects of the reproductive biology of monkfish Lophius vomerinus are described from material collected during hake Merluccius spp. biomass surveys and from commercial monkfish and sole Austroglossus microlepis vessels between January 1996 and June 2000 off Namibia at depths between... -
The taxonomic status of common dolphins Delphinus spp. in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Samaai PB Best MJ GibbonsAside from gender differences, a principal components analysis of skull measurements of 72 adult common dolphins from South Africa failed to distinguish more than one form of Delphinus. Plots of rostral length against zygomatic width indicated most could be referred... -
Seabirds in the diet of Cape fur seals Arctocephalus pusillus pusillus at three mainland breeding colonies in Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Mecenero SP Kirkman J-P RouxPredation by Cape fur seals Arctocephalus pusillus pusillus on seabirds has previously been attributed to a few individuals, mainly males. Scat samples were collected at three mainland breeding colonies of seals in Namibia to determine the extent of seabird predation... -
Food habits of some deep-sea fish off South Africa's west coast. 2. Eels and spiny eels (Anguilliformes and Notacanthiformes)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ME AndersonThe food habits of five species of eels and one species of spiny eel collected from the upper continental slope off the Cape west coast and Agulhas Bank, South Africa, are described. All a re embers of a defined demersal... -
Maintenance mechanisms of plankton populations in frontal zones in the Benguela and Angola Current systems: a preface
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HM Verheye W EkauThis preface provides the background to, and synthesis of research findings from, a set of environmental research-driven cruises off southern Angola, Namibia and South Africa during February–March 2002, under the auspices the BENguela Environment Fisheries Interaction and Training (BENEFIT) Programme... -
Reproductive biology and growth of the yellowbelly rockcod Epinephelus marginatus (Serranidae) from South-East Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ST FennessyInvestigation of the reproductive biology and growth of the yellowbelly rockcod Epinephelus marginatus from South-East Africa confirms that the species is a monandric protogynous hermaphrodite, i.e. males are derived from females, probably as a result of environmental or social cues... -
Influence of nutrient concentrations on the seasonal abundance and distribution of Cyanophyceae in the coastal region of Mount Cameroon
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PM Oben BO ObenWater management in the coastal region of Mount Cameroon is threatened by extensive and persistent noxious blooms of Cyanophyceae (blue-green algae) in the surface and near-surface mesotrophic and eutrophic zones. Nutrient concentrations and species composition of Cyanophyceae were investigated from... -
Diet of Cape fur seals Arctocephalus pusillus pusillus at three mainland breeding colonies in Namibia. 1. Spatial variation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Mecenero J-P Roux LG Underhill MN BesterThe diet composition of Cape fur seals Arctocephalus pusillus pusillus was investigated from three breeding colonies in Namibia between January 1994 and April 2002 using scat analysis. Otolith numbers were corrected for those lost during digestion before determining the percentage... -
Diet of Cape fur seals Arctocephalus pusillus pusillus at three mainland breeding colonies in Namibia. 2. Temporal variation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Mecenero J-P Roux LG Underhill SP KirkmanScat analysis was used to assess temporal variability in the diet composition of Cape fur seals Arctocephalus pusillus pusillus from three breeding colonies in Namibia (January 1994 to April 2002). The diet displayed significant inter- and intra-annual variation in composition... -
Sightings of beaked whales (Cetacea: Ziphiidae) including first confirmed Cuvier's beaked whales Ziphius cavirostris from Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CR WeirThe distribution of beaked whales off the west coast of Africa in the South-East Atlantic Ocean is poorly known. A total of eight beaked whale (Cetacea: Ziphiidae) sightings was recorded off Angola between March 2004 and September 2005. At least... -
The taxonomy and growth of a Crypthecodinium species (Dinophyceae) isolated from a brackish-water fish aquarium
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MW Parrow M Elbrächter MK Krause JM Burkholder NJ Deamer N Htyte EH AllenAn unidentified heterotrophic dinoflagellate found growing in abundance in a brackish-water fish aquarium was isolated and serially cultivated using a fish cell line as the food source. Prominent characteristics of this dinoflagellate included a cingulum that did not fully encircle... -
Historical cyst record as evidence for the recent introduction of the dinoflagellate Gymnodinium catenatum in the north-eastern Atlantic
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Amorim B DaleThe geographical origin of the warm-temperate paralytic shellfish poison producer Gymnodinium catenatum Graham is still under debate. It was first reported in the north-eastern Atlantic in 1976, from the Galician rías (North-West Iberia). Since then, and until 1995, recurrent blooms... -
Alexandrium in the Black Sea — identity, ecology and PSP toxicity
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Vershinin S Morton T Leighfield S Pankov L Smith M Quilliam J RamsdellAlexandrium cf. tamarense was recorded for the first time along the north-eastern coast of the Black Sea in July 2001. Since then, it has been observed annually between May and October. A maximum density of Alexandrium spp. of 9 000... -
A test of an autonomous underwater vehicle as a monitoring tool in shallow water
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PA Tester SR Kibler B Hobson RW LitakerThe utility of micro-autonomous underwater vehicles (AUVs) to detect hydrographic features that concentrate phytoplankton cells was evaluated during a study in a shallow tidal estuary. This study represented the first field test of Ranger™, a micro-AUV adapted for environmental applications... -
A bloom of Dinophysis acuta in a thin layer off North-West Portugal
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MT Moita L Sobrinho-Gonçalves PB Oliveira S Palma M FalcãoDinophysis acuta, which is responsible for diarrhetic shellfish poisoning, reached particularly high concentrations on the north-west coast of Portugal in 2003. In the Ría de Aveiro (40°41'N), the species reached a maximum concentration of 5.0 × 104 cells l−1 on... -
Are different species of Dinophysis selected by climatological conditions?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Escalera B Reguera Y Pazos A Moroño JM CabanasDinophysis acuminata and D. acuta, the main agents of diarrhetic shellfish poisoning outbreaks in the Galician Rías Baixas, North-West Spain, appear segregated in time and/or space and exhibit considerable interannual variability. To explore the specific requirements of the two species... -
Life-cycle stages of Dinophysis acuminata (Dinophyceae) in the Baltic Sea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Hajdu U LarssonDespite many observations of different life-cycle stages of Dinophysis species, the complete life history of the genus is still unknown owing to the difficulties encountered in culturing these species. The seasonal distribution of D. acuminata was followed at two offshore... -
Algicidal bacteria isolated from the surface of seaweeds from the coast of Osaka Bay in the Seto Inland Sea, Japan
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Imai D Fujimaru T Nishigaki M Kurosaki H SugitaAlgicidal bacteria offer a promising tool for the prevention of red tides, because they are able to play a key role in terminating blooms in coastal areas. This study details the detection of vast numbers of algicidal bacteria attached to... -
Kill your enemies and eat them with the help of your toxins: an algal strategy
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E GranéliPrymnesium spp. have been shown to kill both their grazers and other algal species, by producing allelopathic compounds. Killing nutrient-competing phytoplankton species enables Prymnesium to freely utilise limiting resources. Mixotrophy, i.e. the ability to ingest bacteria, other algae, and potential... -
Analytical detection of parasite infection of Dinophysis norvegica using FISH probes
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PS Salomon S Janson L-Å Gisselson E GranéliParasites of the genus Amoebophrya infect several free-living dinoflagellates, including harmful species. Whereas advanced infection can be easily detected, earlier stages of infection are more difficult to establish. rRNA-based fluorescent in situ hybridisation (FISH) probes specific to Amoebophrya sp. infecting... -
Examining the 'global spreading hypothesis' using graph theory
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Jordán T WyattA persistent view, called the 'global spreading hypothesis', maintains that the frequency, magnitude and geographical extent of harmful algal blooms have increased in recent decades. These putative trends have been variously attributed to nutrient enrichment, climate change and inadequate databases... -
Species specificity and potential roles of Karlodinium micrum toxin
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JE Adolf TR Bachvaroff DN Krupatkina H Nonogaki PJP Brown AJ Lewitus HR Harvey AR PlaceKarlodinium micrum is a toxic mixotrophic dinoflagellate that has been responsible for fish kills in coastal environments worldwide. The role that karlotoxins play in the life history of K. micrum is unknown, but may contribute to its bloom-forming ability. We... -
Isolation and characterisation of photoactive haemolytic toxin from Heterocapsa circularisquama
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Y Miyazaki T Iwashita K Yamaguchi T Oda Y Matsuyama T HonjoRed tides of Heterocapsa circularisquama, identified as a new species of dinoflagellate a few years ago, have frequently caused mass mortality of several species of bivalve in Japan, whereas no harmful effects on fish have been reported so far. We... -
Comparative trophodynamics of anchovy Engraulis encrasicolus and sardine Sardinops sagax in the southern Benguela: are species alternations between small pelagic fish trophodynamically mediated?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CD van der Lingen L Hutchings JG FieldThe results of detailed morphological, experimental, field and modelling studies on various aspects of the trophic ecology of sardine Sardinops sagax and anchovy Engraulis encrasicolus in the Benguela ecosystem are synthesised, and differences in the trophodynamics of these two species... -
Pigment signatures of phytoplankton composition in the northern Benguela ecosystem during spring
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Barlow D Louw M Balarin J AlheitPigment indices were used to investigate the distribution and composition of phytoplankton in the northern Benguela during the austral spring of 2000, with sampling being conducted on five transect lines between 19°S and 25°S and at other inshore stations on... -
Remotely sensed variability of temperature and chlorophyll in the southern Benguela: upwelling frequency and phytoplankton response
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SJ Weeks R Barlow C Roy FA ShillingtonHigh-resolution (1km) satellite data from the NOAA AVHRR (Advanced Very High Resolution Radiometer) and OrbView-2 SeaWiFS (Sea-viewing Wide Field-of-view Sensor) are used to investigate the upper layer dynamics of the southern Benguela ecosystem in more detailed space and time scales... -
Comparison of assemblages and some life-history traits of seabirds in the Humboldt and Benguela systems
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford E Goya J-P Roux CB ZavalagaThere are 21 and 15 species of seabirds that breed in the Humboldt and Benguela upwelling systems respectively. Only two species of gull are common to both systems, one as an endemic subspecies to the Benguela system. Eleven species and... -
Euphausiid population structure and grazing in the Antarctic Polar Frontal Zone — austral autumn 2004
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ATF Bernard PW FronemanThe euphausiid community structure and grazing dynamics were investigated in the West Indian sector of the Polar Frontal Zone during the austral autumn 2004. Subsurface (200m) temperature profiles indicated that an intense frontal feature, formed by the convergence of the... -
A comparative evaluation of three methods used to tag South African linefish
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SE Kerwath A Götz C Wilke CG Attwood WHH SauerTagging effects and loss rates of 60 Roman Chrysoblephus laticeps tagged with dart tags with barbs (D-tags), T-bar filaments (T-tags) and visible implant fluorescent elastomer (VIFE) tags were investigated. The fish were tagged and monitored in a controlled tank experiment... -
Impact of predation by Cape fur seals Arctocephalus pusillus pusillus on Cape gannets Morus capensis at Malgas Island, Western Cape, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AB Makhado RJM Crawford LG UnderhillCape fur seals Arctocephalus pusillus pusillus were estimated to kill some 6 000 Cape gannet Morus capensis fledglings around Malgas Island in the 2000/01 breeding season, 11 000 in 2003/04 and 10 000 in 2005/06. This amounted to about 29%,... -
Distribution patterns of striped mullet Mugil cephalus in mangrove creeks, Zanzibar, Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AW Mwandya --- Department of Animal Sciences and Production, Tanzania YD Mgaya --- Department of Aquatic Sciences and Technology, Tanzania MC Öhman --- Department of Zoology, Sweden I Bryceson --- , Norway M Gullström --- Department of Zoology, SwedenSpatial and seasonal variations in density of striped mullet Mugil cephalus were investigated in four mangrove creeks in Zanzibar, Tanzania, during a one-year cycle. Fish were collected monthly in the lower, intermediate and upper reaches of each creek using a... -
First report of Phoronis ovalis from Africa and its effect on mussel hosts
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JL Ruesink --- Department of Biology, USA AC Trimble --- Department of Biology, USAPhoronis ovalis is a cosmopolitan, shell-boring phoronid worm reported from 24 locations worldwide in temperate latitudes, but not previously from Africa. We identified a shell-boring phoronid in Namibia that is morphologically similar to P. ovalis and subsequently surveyed its latitudinal... -
A near mass stranding of cetaceans in St Helena Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PB Best --- , South Africa D Reeb --- , South AfricaA group of 70 false killer whales Pseudorca crassidens and 124 bottlenose dolphins Tursiops sp., and a separate group of 13 Risso's dolphins Grampus griseus, assembled close inshore off a known mass-stranding site in St Helena Bay, South Africa, in... -
Killer whales in South African waters—a review of their biology
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PB Best --- Mammal Research Institute, South Africa MA Meÿer --- Department of Environmental Affairs, South Africa C Lockyer --- , DenmarkThe distribution, seasonality and schooling behaviour of killer whales Orcinus orca in South African waters have been investigated from 785 records compiled between 1963 and 2009, and their size, morphometrics, growth, reproduction, food and feeding behaviour described from the examination... -
Dusky dolphins Lagenorhynchus obscurus and Cape fur seals Arctocephalus pusillus pusillus: fatty acid composition of their blubber and prey species
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: O Grahl-Nielsen --- Department of Chemistry, Norway J-O Krakstad --- , Norway L Nøttestad --- , Norway BE Axelsen --- , NorwayThe fatty acid composition of the blubber of five dusky dolphins Lagenorhynchus obscurus and five Cape fur seals Arctocephalus pusillus pusillus from the northern Benguela ecosystem (South-East Atlantic) and their main prey was determined. Differences in fatty acid composition of... -
Broad-scale distribution patterns of sardine and their predators in relation to remotely sensed environmental conditions during the KwaZulu-Natal sardine run
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SH O’Donoghue --- School of Biological and Conservation Sciences, South Africa L Drapeau --- , France VM Peddemors --- School of Biological and Conservation Sciences, South AfricaThe annual movement of South African sardine Sardinops sagax up the east coast of South Africa, known as the ‘sardine run’, was investigated using data from aerial surveys for the period 1988–2005 and compared with remotely sensed sea surface temperature... -
The KwaZulu-Natal sardine run: shoal distribution in relation to nearshore environmental conditions, 1997–2007
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SH O’Donoghue --- School of Biological and Conservation Sciences, South Africa L Drapeau --- , France SFJ Dudley --- , South Africa VM Peddemors --- School of Biological and Conservation Sciences, South AfricaThe nearshore presence of sardine Sardinops sagax on the KwaZulu-Natal (KZN) coast was investi-gated using sightings data collected by the KZN Sharks Board from 1997 to 2007. The spatio-temporal distribution of sardine was described in relation to that of their... -
Abundance and distribution of avian and marine mammal predators of sardine observed during the 2005 KwaZulu-Natal sardine run survey
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SH O’Donoghue --- School of Biological and Conservation Sciences, South Africa PA Whittington --- Department of Zoology, PO Box 77000, South Africa BM Dyer --- Oceans and Coasts, Department of Environmental Affairs, South Africa VM Peddemors --- School of Biological and Conservation Sciences, South AfricaOpportunistic observations to determine the relative abundance and distribution of marine mammal and seabird predators of sardine Sardinops sagax were carried out during a dedicated multidisciplinary research survey off the South African east coast in June and July of 2005... -
Surviving off junk: low-energy prey dominates the diet of African penguins Spheniscus demersus at Mercury Island, Namibia, between 1996 and 2009
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Ludynia --- Animal Demography Unit, Department of Zoology, South Africa J-P Roux --- Animal Demography Unit, Department of Zoology, South Africa R Jones --- Ministry of Fisheries and Marine Resources, Namibia J Kemper --- Ministry of Fisheries and Marine Resources, Namibia LG Underhill --- Animal Demography Unit, Department of Zoology, South AfricaThe diet of African penguins Spheniscus demersus in Namibia consisted mainly of sardine Sardinops sagax in the 1950s. Since the collapse of pelagic fish stocks in the 1970s, birds fed mainly on bearded (pelagic) goby Sufflogobius bibarbatus, a low-energy prey... -
Conus pennaceus: a phylogenetic analysis of the Mozambican molluscan complex
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CM Pereira --- , Portugal J Rosado --- , Mozambique SG Seabra --- , Portugal F Pina-Martins --- , Portugal OS Paulo --- , Portugal PJ Fonseca --- , PortugalThe genus Conus has over 500 species and is the most species-rich taxon of marine invertebrates. Based on mitochondrial DNA, this study focuses on the phylogenetics of Conus, particularly the pennaceus complex collected along the Mozambican coast. Phylogenetic trees based... -
An unusual nursing interaction between two adult Cape fur seals Arctocephalus pusillus pusillus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Kirkman --- Animal Demography Unit, Department of Zoology, South AfricaGiven the high costs of lactation and the importance of milk for pup growth and survival in pinnipeds, nursing behaviour directed by a lactating female towards another adult is unexpected. Here, details were noted of a nursing interaction that occurred... -
Natural markings of Cuvier's beaked whale Ziphius cavirostris in the Mediterranean Sea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Rosso --- CIMA Research Foundation, Italy M Ballardini --- , Italy A Moulins --- CIMA Research Foundation, Italy M Würtz --- Biology Department, ItalyErrors in analysis using natural marks have been recognised since the early development of mark-recapture techniques. In this nine-year study, the mark types present on Cuvier's beaked whales Ziphius cavirostris in the Mediterranean Sea were categorised in order to assess... -
Seasonal variations of agar extracted from different life stages of Gracilaria cliftonii (Gracilariales, Rhodophyta) from Western Australia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Muñoz --- Centre for Environment and Sustainable Aquaculture, Faculty of Science and Engineering, Australia R Fotedar --- Centre for Environment and Sustainable Aquaculture, Faculty of Science and Engineering, AustraliaSeasonality in yield, physical and chemical properties of the native agar from different life stages of Gracilaria cliftonii was investigated over a period of six seasons (autumn 2008–winter 2009). Agar yield and its properties varied as a function of seasons... -
Feeding and ecomorphology of seven flatfish species in the North-North-West Aegean Sea, Greece
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PK Karachle --- Laboratory of Ichthyology, Department of Zoology, Greece KI StergiouThe diet composition and possible relationships between mouth area and intestine length with feeding were investigated for seven flatfish species in the North-North-West Aegean Sea. Samples were obtained from commercial fisheries (trawls and gillnets) on a seasonal basis, and a... -
An alternative method for estimating the status of resident reef fish stocks, based on differential fishing effort across a marine reserve boundary
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Götz --- Elwandle Node, South Africa SE Kerwath --- Branch Fisheries, Department of Agriculture, South Africa CG Attwood --- Marine Research Institute, Zoology Department, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South AfricaThe stock status of roman Chrysoblephus laticeps was estimated in the Goukamma, a temperate South African marine protected area (MPA). Standardised catch per unit effort (CPUE) from a controlled angling survey on both sides of the MPA border was employed... -
Cross-shelf observations of diet and diel feeding behaviour of the bearded goby Sufflogobius bibarbatus off Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Hundt --- Department of Biology, Norway AC Utne-Palm --- Department of Biology, Norway MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaThe diet of the bearded goby Sufflogobius bibarbatus was studied at two 48 h stations off the Namibian coast. The inner station (120 m) was characterised by a deep layer of low-oxygen bottom water (<0.5 ml DO l−1 or <10%... -
Collapse of South Africa's penguins in the early 21st century
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Oceans and Coasts, Department of Environmental Affairs, South Africa R Altwegg --- Animal Demography Unit, South Africa BJ Barham --- , UK PJ Barham --- Animal Demography Unit, South Africa JM Durant --- Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biology, Norway BM Dyer --- Oceans and Coasts, Department of Environmental Affairs, South Africa D Geldenhuys --- , South Africa AB Makhado --- Oceans and Coasts, Department of Environmental Affairs, South Africa L Pichegru --- Percy FitzPatrick Institute of African Ornithology, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, South Africa LG Underhill --- Animal Demography Unit, South Africa L Upfold --- Oceans and Coasts, Department of Environmental Affairs, South Africa J Visagie --- , South Africa LJ Waller --- Animal Demography Unit, South Africa PA Whittington --- , South AfricaThe number of African penguins Spheniscus demersus breeding in South Africa collapsed from about 56 000 pairs in 2001 to some 21 000 pairs in 2009, a loss of 35 000 pairs (>60%) in eight years. This reduced the global... -
Accumulation of diarrhetic shellfish poisoning toxins in the oyster Crassostrea gigas and the mussel Choromytilus meridionalis in the southern Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GC Pitcher --- Branch: Fisheries Management, Department of Agriculture, South Africa B Krock --- , Germany AD Cembella --- , GermanyDiarrhetic shellfish poisoning (DSP) poses a significant threat to the safe consumption of shellfish in the southern Benguela ecosystem. The accumulation of DSP toxins was investigated in two cultivated bivalve species, the Pacific oyster Crassostrea gigas and the mussel Choromytilus... -
Phytoplankton production and adaptation in the vicinity of Pemba and Zanzibar islands, Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Barlow --- , South Africa T Lamont --- , South Africa M Kyewalyanga --- , Tanzania H Sessions --- Oceans and Coasts, Department of Environmental Affairs, South Africa M van den Berg --- Oceans and Coasts, Department of Environmental Affairs, South Africa F Duncan --- , South AfricaPhytoplankton production and physiology were investigated at six selected locations during a research cruise in early October 2007 in Tanzanian coastal waters. The dataset included photosynthesis– irradiance and active fluorescence parameters, phytoplankton absorption coefficients, and pigment concentrations. Primary production was... -
The reproductive style of Diplodus capensis (Sparidae) in southern Angola: rudimentary hermaphroditism or partial protandry?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TJ Richardson --- Department of Ichthyology and Fisheries Science, PO Box 94, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, PO Box 94, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, PO Box 94, South AfricaThe reproductive style of Diplodus capensis was examined in an unexploited coastal area in southern Angola. The mean length of females was significantly greater than that of males and, although not significant, females dominated the older age classes. The overall... -
Tube-forming polychaetes enhance invertebrate diversity and abundance in sandy sediments of Mozambique, Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MS Thomsen --- Marine Department, National Environmental Research Institute, Denmark MF Muth --- Department of Environmental Sciences, USA KJ McGlathery --- Department of Environmental Sciences, USAIn marine soft-bottom systems, polychaetes can increase habitat complexity by constructing rigid tubes (e.g. several onuphid species) that contrast with surrounding topographically flat sediments. These structures can provide predation refuges and increase larval settlement and thereby increase the richness and... -
Observations of individual humpback whales utilising multiple migratory destinations in the south-western Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PJ Ersts --- Center for Biodiversity and Conservation, USA C Pomilla --- Sackler Institute for Comparative Genomics, USA J Kiszka --- Observatoire des Mammifères Marins, France S Cerchio --- Sackler Institute for Comparative Genomics, USA HC Rosenbaum --- Center for Biodiversity and Conservation, USA M Vély --- , France Y Razafindrakoto --- Madagascar Country Program, Madagascar JA Loo --- Sackler Institute for Comparative Genomics, USA MS Leslie --- Sackler Institute for Comparative Genomics, USA M Avolio --- Barnard College, USAMovements of humpback whales Megaptera novaeangliae among breeding regions within the southwestern Indian Ocean are poorly understood. Understanding the relationships among breeding regions is critical for effective conservation and management strategies. Through systematic comparisons of molecular genotypes and both systematic... -
Transit station or destination? Attendance patterns, movements and abundance estimate of humpback whales off west South Africa from photographic and genotypic matching
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Barendse --- , South Africa PB Best --- , South Africa M Thornton --- , South Africa SH Elwen --- , South Africa HC Rosenbaum --- , USA I Carvalho --- , USA C Pomilla --- , USA TJQ Collins --- , USA MA Meÿer --- , South Africa RH Leeney --- , UKHumpback whales Megaptera novaeangliae found off west South Africa (WSA) are known to display an atypical migration that may include temporary residency and feeding during spring and summer. At a regional scale there is uncertainty about how these whales relate... -
Recolonisation of the Robberg Peninsula (Plettenberg Bay, South Africa) by Cape fur seals
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Huisamen --- , South Africa SP Kirkman --- Department of Environmental Affairs, South Africa LH Watson --- , South Africa VG Cockcroft --- Department of Zoology, South Africa PA Pistorius --- Department of Zoology, South AfricaThe Cape fur seal Arctocephalus pusillus pusillus colony at Robberg Peninsula, Plettenberg Bay, on the south-east coast of South Africa, was driven to extinction by indiscriminate harvesting by the late 1800s. Seals only began to recolonise this site in the... -
Early post-release survival of stranded Cape fur seal pups at Black Rocks, Algoa Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GJG Hofmeyr --- , South Africa M du Toit --- , South Africa SP Kirkman --- Department of Environmental Affairs, South AfricaThe small and isolated Cape fur seal Arctocephalus pusillus pusillus rookery at Black Rocks, Algoa Bay, South Africa, is an important component of the marine biota of the Addo Elephant National Park. Although little is known of the demographics of... -
Prioritising range-wide scientific monitoring of the Cape fur seal in southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Kirkman --- Department of Environmental Affairs, South Africa WH Oosthuizen --- Department of Environmental Affairs, South Africa MA Meÿer --- Department of Environmental Affairs, South Africa SM Seakamela --- Department of Environmental Affairs, South Africa LG Underhill --- Department of Zoology, South AfricaThe range of the Cape fur seal Arctocephalus pusillus pusillus population largely coincides with the region of the cold, nutrient-rich Benguela Current Large Marine Ecosystem (BCLME) adjoining the west coast of South Africa, Namibia and Angola. Range-wide scientific monitoring of... -
The Marine Mammal Programme at the Prince Edward Islands: 38 years of research
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MN Bester --- Department of Zoology and Entomology, University of Pretoria, South Africa PJN de Bruyn WC Oosthuizen CA Tosh T McIntyre RR Reisinger M Postma DS van der Merwe M WegeThe Marine Mammal Programme (MMP) conducts research on pinnipeds and killer whales Orcinus orca at Marion Island, Prince Edward Islands, under the auspices of the Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria. The history of the... -
Cetacean research in the southern African subregion: a review of previous studies and current knowledge
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SH Elwen --- , South Africa KP Findlay --- Department of Oceanography, South Africa J Kiszka --- , France CR Weir --- , UKCetacean research, in terms of the number of papers, and areas for which data are available, has expanded considerably in the southern African subregion in the past decade, especially in the South-West Indian Ocean. We review cetacean research within this... -
Seasonal fluctuations in occurrence of inshore Bryde's whales in Plettenberg Bay, South Africa, with notes on feeding and multispecies associations
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GS Penry --- , UK VG Cockcroft --- Department of Zoology, Nelson Mandela Metropolitan University, South Africa PS Hammond --- , UKSeasonal fluctuations in the occurrence of inshore South African Bryde's whales Balaenoptera edeni were investigated between November 2005 and June 2008. Sighting data were collected in Plettenberg Bay on the south-east coast of South Africa. Bryde's whale occurrence was modelled... -
The seaweeds of Angola: the transition between tropical and temperate marine floras on the west coast of southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJ Anderson --- Branch: Fisheries, Department of Agriculture, Forestry and Fisheries, South Africa JJ Bolton --- Botany Department and Marine Research Institute, South Africa AJ Smit --- School of Biological and Conservation Sciences, South Africa D da Silva Neto --- Departamento de Ambiente do Instituto Nacional de Investigação Pesqueira (INIP), AngolaThe seaweed flora of Angola is relatively poorly known. Most of the 124 records listed for the country come from a 1974 British Natural History Museum expedition to the central and southern parts of that country. Previous biogeographic studies treated... -
Morphological and molecular evidences within Osmundea (Ceramiales, Rhodophyta) from the Canary Islands, eastern Atlantic Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Machín-Sánchez --- Departamento de Biología Vegetal (Botánica), Spain J Díaz-Larrea --- Departamento de Hidrobiología, México MT Fujii --- , Brazil A Sentíes --- Departamento de Hidrobiología, México V Cassano --- Departamento de Botânica, Brazil MC Gil-Rodríguez --- Departamento de Biología Vegetal (Botánica), SpainThe genus Osmundea is a strongly supported monophyletic group within the Laurencia complex and shows a disjunct distribution occurring in the North-East and South-West Pacific, the Indian and Atlantic oceans and the Mediterranean Sea. Its phenotypic plasticity on the Canary... -
A review of the ecology and management of temporarily open/closed estuaries in South Africa, with particular emphasis on river flow and mouth state as primary drivers of these systems
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AK Whitfield --- , South Africa GC Bate --- Department of Botany, South Africa JB Adams --- Department of Botany, South Africa PD Cowley --- , South Africa PW Froneman --- Department of Zoology and Entomology, South Africa PT Gama --- Department of Botany, South Africa NA Strydom --- Department of Zoology, South Africa S Taljaard --- , South Africa AK Theron --- , South Africa JK Turpie --- , South Africa L van Niekerk --- , South Africa TH Wooldridge --- Department of Zoology, South AfricaResearch in South African temporarily open/closed estuaries that includes studies on the hydrodynamics, sediment dynamics, macronutrients, microalgae, macrophytes, zoobenthos, hyperbenthos, zooplankton, ichthyoplankton, fishes and birds is used as a basis to review the ecology and management of this estuary type... -
A characterisation of the paddle-ski fishery in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- , South Africa P Pradervand --- , South Africa JQ Maggs --- , South Africa S Wintner --- , South AfricaThe KwaZulu-Natal (KZN) paddle-ski fishery in South Africa consists mainly of light-weight fishing kayaks operated by a single fisher in the marine nearshore environment. The social, economic, management and fisheries parameters of this sector were investigated during the period December... -
In situ video observations of benthic megafauna and fishes from the deep eastern Mediterranean Sea off Egypt
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AR Gates --- SERPENT Project, UK DOB Jones --- SERPENT Project, UK JE Cartes --- , SpainRemotely operated vehicle (ROV) video observations were used to document benthic fauna at a hydrocarbon drilling location, at 2 720 m depth, in the poorly studied deep water off northern Egypt. The decapod Chaceon mediterraneus was the most common organism... -
South African kelp moving eastwards: the discovery of Ecklonia maxima (Osbeck) Papenfuss at De Hoop Nature Reserve on the south coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JJ Bolton --- Botany Department and Marine Research Institute, South Africa RJ Anderson --- Botany Department and Marine Research Institute, South Africa AJ Smit --- School of Biological and Conservation Sciences, Faculty of Science, South Africa MD Rothman --- Botany Department and Marine Research Institute, South AfricaHistorical and recent evidence is documented to demonstrate that the eastern limit of the major kelp-bed forming seaweed Ecklonia maxima has moved c. 73 km eastward along the south coast of South Africa since 2006, after remaining unchanged for almost... -
The November 2011 irruption of buoy barnacles Dosima fascicularis in the Western Cape, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PG Ryan --- Percy FitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, South Africa GM Branch --- Marine Research Institute, Department of Zoology, South AfricaNovember 2011 saw an unprecedented irruption of buoy barnacles Dosima fascicularis in coastal waters off the Western Cape, South Africa. Buoy barnacles not uncommonly strand in the region attached to feathers, plastic litter and other small objects, but the 2011... -
Gonadal cycle of the dwarf oyster Ostreola stentina from the south of the Gulf of Hammamet on the eastern coast of Tunisia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Ben Salah --- Laboratoire de Biodiversité et Ecosystèmes Aquatiques, Tunisie A Bouain --- Laboratoire de Biodiversité et Ecosystèmes Aquatiques, Tunisie L Neifar --- Laboratoire de Biodiversité et Ecosystèmes Aquatiques, TunisieThe reproductive cycle of the dwarf oyster Ostreola stentina (Payraudeau 1826) at Monastir in the south of the Gulf of Hammamet on the east coast of Tunisia was studied using condition indices and histological techniques. The species was shown to... -
Variability in estuarine water temperature gradients and influence on the distribution of zooplankton: a biogeographical perspective
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TH Wooldridge --- Department of Zoology, South Africa SHP Deyzel --- , South AfricaStructure and variability of water temperature gradients and potential influence on distribution of two tropical zooplankters (the mysid Mesopodopsis africana and the copepod Acartia natalensis) and their temperate congenerics (M. wooldridgei and A. longipatella) was investigated over a 10-year period... -
St Helena Bay (southern Benguela) then and now: muted climate signals, large human impact
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Hutchings --- Department of Environmental Affairs, South Africa A Jarre --- Marine Research (MA-RE) Institute, South Africa T Lamont --- Department of Environmental Affairs, South Africa M van den Berg --- Department of Environmental Affairs, South Africa SP Kirkman --- Department of Environmental Affairs, South AfricaThe development of suitable reference states for ecosystem-based management requires documentation of changes in structure and functioning of marine ecosystems, including assessment of the relative importance of bottom-up and top-down processes as drivers of change. We used monitoring data available... -
Photosynthetic performance, epiphyte biomass and nutrient content of two seagrass species in two areas with different level of nutrients along the Dar es Salaam coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: EF Mvungi --- Department of Botany, Tanzania FA Mamboya --- Department of Sciences and Laboratory Technology, TanzaniaHeavy nutrient loads in coastal waters often lead to excessive growth of microalgal and macroalgal epiphytes on seagrass leaves, with varying effects on the underlying seagrasses. This study evaluates the photosynthetic performance, epiphytic biomass and tissue nutrient content of two... -
A hard-knock life: the foraging ecology of Cape cormorants amidst shifting prey resources and industrial fishing pressure
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MH Hamann --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa D Grémillet --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa PG Ryan --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa F Bonadonna --- , France CD van der Lingen --- Department of Agriculture, Forestry and Fisheries, South Africa L Pichegru --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South AfricaOnce one of the most numerous seabirds of the Benguela upwelling system, the population of Cape cormorants Phalacrocorax capensis has decreased by 60% in the past three decades and the species is listed as Near Threatened. Declines in prey availability... -
Phytoplankton absorption and pigment adaptation of a red tide in the Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Barlow --- , South Africa T Lamont --- , South AfricaPhytoplankton absorption and pigment characteristics of a red tide were investigated in coastal waters of the southern Benguela. Diagnostic indices indicated that dinoflagellates were the dominant phytoplankton group, with diatoms and small flagellates being of secondary importance. Very high biomass... -
Trends in numbers of crowned cormorants in South Africa, with information on diet
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Oceans and Coasts, Department of Environmental Affairs, South Africa BM Dyer --- Oceans and Coasts, Department of Environmental Affairs, South Africa D Geldenhuys --- , South Africa AB Makhado --- Oceans and Coasts, Department of Environmental Affairs, South Africa RM Randall --- , South Africa L Upfold --- Oceans and Coasts, Department of Environmental Affairs, South Africa J Visagie --- , South Africa L Waller --- Animal Demography Unit, South AfricaDuring 2008–2012, the number of crowned cormorants Phalacrocorax coronatus breeding in South Africa was c. 1 900 pairs, compared to 1 700 pairs for 1977–1981. Numbers at 10 islands in the Western Cape province fluctuated around a level of 1... -
Patterns of endemicity and range restriction among southern African coastal marine invertebrates
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJ Scott --- Marine Biology Research Centre, Zoology Department, South Africa CL Griffiths --- Marine Biology Research Centre, Zoology Department, South Africa TB Robinson --- Department of Botany and Zoology, South AfricaSouthern Africa supports a rich marine biota of 12 734 currently described marine species. Although the distribution and overall species-richness patterns of several component taxa are well documented, studies considering range sizes are absent. This study considers range size frequencies... -
First record of Mesoplodon densirostris (Blainville 1817) from continental East Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Valle --- Department of Biology and Biotechnology Charles Darwin, ItalyBlainville's beaked whale Mesoplodon densirostris is one of the most widely distributed members of the family Ziphiidae (the beaked whales). However, its exact distribution in many parts of the world remains unknown. On 24 November 2004, the partly skeletonised carcass... -
Significant population genetic structuring of the holoplanktic scyphozoan Pelagia noctiluca in the Atlantic Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BJ Miller --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa S von der Heyden --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaPelagia noctiluca is thought to have a global distribution, yet our understanding of genetic connectivity across the range of this problem animal is poor. Here, we investigate the genetic structure of populations off southern Africa using mitochondrial COI and nuclear... -
Mesoscale features and phytoplankton biomass at the GoodHope line in the Southern Ocean during austral summer
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Swart --- Southern Ocean Carbon and Climate Observatory, South Africa SJ Thomalla --- Southern Ocean Carbon and Climate Observatory, South Africa PMS Monteiro --- Southern Ocean Carbon and Climate Observatory, South Africa IJ Ansorge --- Department of Oceanography, Marine Research Institute, South AfricaTwo sets of high-resolution subsurface hydrographic and underway surface chlorophyll a (Chl a) measurements are used, in conjunction with satellite remotely sensed data, to investigate the upper layer oceanography (mesoscale features and mixed layer depth variability) and phytoplankton biomass at... -
Evaluation of an underwater biopsy probe for collecting tissue samples from bull sharks Carcharhinus leucas
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Daly --- Department of Zoology and Entomology, South Africa MJ Smale --- , South AfricaThis study evaluated the use of a novel underwater biopsy probe designed to collect muscle and dermal tissue samples from large (170–220 cm total length), free-swimming bull sharks Carcharhinus leucas. The biopsy probe tissue retention rate was 87% after 23... -
Age, growth and reproductive biology of the blue shark Prionace glauca in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KA Jolly --- Zoology Department, South Africa C da Silva --- Fisheries Research, Department of Agriculture, South Africa CG Attwood --- Zoology Department, South AfricaThe age, growth and reproductive biology of the blue shark Prionace glauca from South African waters were assessed using 205 specimens, ranging in total length (TL) from 72 to 313 cm. Greater number of males (120) than females (85) were... -
High-latitude connectivity of the scleractinian coral Acropora tenuis in the south-western Indian Ocean, identified using nuclear intron and mitochondrial sequence data
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Chiazzari --- School of Life Sciences, South Africa A Macdonald --- School of Life Sciences, South Africa M Schleyer --- , South AfricaAll scleractinian corals in southern Africa occupy the high-latitude margins of their biogeographical range, with some straddling multiple biogeographical regions. Connectivity among these populations is essential to maintain genetic diversity, and thus their conservation value. Therefore, the aim of this... -
Abyssal scavenging demersal fauna at two areas of contrasting productivity on the Subantarctic Crozet Plateau, southern Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NJ Cousins --- Oceanlab, UK T Horton --- National Oceanography Centre, Southampton, UK BD Wigham --- Dove Marine Laboratory, School of Marine Science and Technology, UK PM Bagley --- Oceanlab, UKThe Crozet Plateau is situated below typical high-nutrient, low-chlorophyll (HNLC) waters of the southern Indian Ocean. The area to the east of the Crozet Islands experiences high levels of surface productivity during the austral summer due to natural iron enrichment... -
Feeding habits and food partitioning between three commercial fish associated with artificial reefs in a tropical coastal environment
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Mablouké --- Université de la Réunion, Laboratoire ECOMAR FRE 3560 (CNRS/INEE/UR), France J Kolasinski --- IsoEnvironmental cc, Botany Department, South Africa M Potier --- IRD, UMR 212 EME (IRD/IFREMER/UM2), France A Cuvillier --- Université de la Réunion, Laboratoire ECOMAR FRE 3560 (CNRS/INEE/UR), France G Potin --- Université de la Réunion, Laboratoire ECOMAR FRE 3560 (CNRS/INEE/UR), France L Bigot --- Université de la Réunion, Laboratoire ECOMAR FRE 3560 (CNRS/INEE/UR), France P Frouin --- Université de la Réunion, Laboratoire ECOMAR FRE 3560 (CNRS/INEE/UR), France S Jaquemet --- Université de la Réunion, Laboratoire ECOMAR FRE 3560 (CNRS/INEE/UR), FranceAt Réunion Island (south-western Indian Ocean), artificial reefs were submerged in 2003 in a bay and were soon colonised by fish, among which were the highly abundant commercial species Lutjanus kasmira, Priacanthus hamrur and Selar crumenophthalmus. The high concentration and... -
Validation of aerosol products derived from ocean colour in East African coastal waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Mélin --- European Commission – Joint Research Centre, Italy B N Holben --- Goddard Space Flight Center, Biospheric Sciences Branch, USA Y Courcoux --- Observatoire de Physique de l'Atmosphère de la Réunion, FranceThe aerosol products derived from the ocean colour missions SeaWiFS and MODIS (Aqua and Terra) were assessed with AERONET field measurements collected at sites in Mozambique (Inhaca) and Kenya (Malindi). The median of absolute relative differences between satellite and AERONET... -
Behavioural observations of the common octopus Octopus vulgaris in Baía dos Tigres, southern Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CL de Beer --- Department of Ichthyology and Fisheries Science, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaObservations on the behaviour of the common octopus Octopus vulgaris were made during daytime and night-time sampling on an unexploited rocky reef habitat in Baía dos Tigres, southern Angola. The relative numerical abundance sampled was 0.47 octopus person–1 h–1 during... -
Bottlenose dolphin Tursiops truncatus at São Tomé Island (São Tomé and Príncipe) — relative abundance, site fidelity and social structure
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Pereira --- Escola de Mar, Portugal F Martinho --- Escola de Mar, Portugal C Brito --- Escola de Mar, Portugal I Carvalho --- Escola de Mar, PortugalAlthough the bottlenose dolphin Tursiops truncatus is one of the most common cetacean species around São Tomé Island, Gulf of Guinea, little research has focused on this species in this region. This study investigated the population of bottlenose dolphins around... -
Effect of human disturbance on the behavioural responses and offspring survival of grey-headed albatrosses Thalassarche chrysostoma at Subantarctic Marion Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Wheeler --- Animal Demography Unit, Department of Zoology, University of Cape Town, South Africa MS de Villiers --- Animal Demography Unit, Department of Zoology, University of Cape Town, South Africa R Altwegg --- Animal Demography Unit, Department of Zoology, University of Cape Town, South AfricaNest monitoring is commonly used to gather important seabird demographic data, but monitoring itself can affect seabird behaviour and offspring survival. The effect of monitoring on grey-headed albatrosses Thalassarche chrysostoma at Subantarctic Marion Island was investigated. The behaviour of chicks... -
Inter-island movements of common bottlenose dolphins Tursiops truncatus among the Canary Islands: online catalogues and implications for conservation and management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Tobeña --- Departamento de Biología Animal, Spain A Escánez --- Departamento de Biología Animal, Spain Y Rodríguez --- Departamento de Biología Animal, Spain C López --- Departamento de Biología Animal, Spain F Ritter --- MEER eV, Germany N Aguilar --- Departamento de Biología Animal, SpainA total of 313 individual common bottlenose dolphins Tursiops truncatus was photo-identified in four Special Areas of Conservation (SACs) in the western Canary Islands, Spain (El Hierro, La Palma, La Gomera and Tenerife), over a 10-year period (2001–2011). Of these,... -
An end-to-end coupled model ROMS-N2P2Z2D2-OSMOSE of the southern Benguela foodweb: parameterisation, calibration and pattern-oriented validation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Travers-Trolet --- IFREMER [French Research Institute for the Exploitation of the Sea], France Y-J Shin --- IRD [Research Institute for Development] CRH [Centre of Mediterranean and Tropical Fisheries Research], France JG Field --- Marine Research Institute, South AfricaIn order to better understand ecosystem functioning under simultaneous pressures (e.g. both climate change and fishing pressures), integrated modelling approaches are advocated. We developed an end-to-end model of the southern Benguela ecosystem by coupling the high trophic level model OSMOSE... -
Assessing Pharmaceutical Innovation in Tunisia: An Empirical Survey on Firms' Knowledge-Capital and an Analysis of the National Sectoral Innovation System
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nejla Yacoub --- Faculty of Economics and Management Sciences, TunisiaThe objective of this research was to assess pharmaceutical innovation in Tunisia. First, we examined the national sectoral innovation system (NSIS), focusing on the objectives and instruments of the industrial and innovation policy. Second, we adopted an empirical approach based... -
A Rapid Solar Transition is not only Possible, it is Imperative!
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: David Schwartzman --- Department of Biology, USA Peter Schwartzman --- Department of Environmental Studies, USACatastrophic climate change (C3) is inevitable if carbon emissions to the atmosphere are not rapidly reduced and the now unsafe atmospheric level (400 ppm) CO2 (and rising) is not brought down by sequestration technologies to below 350 ppm. C3 prevention is possible... -
A Disruptive Innovation Model for Indigenous Medicine Research: A Nigerian Perspective
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Michael O.S. Afolabi --- Centre for Healthcare Ethics, USANon-availability of affordable medicines remains a recurring theme in the healthcare sector of countries in the South where it hampers drug compliance and creates an ambience for continued morbidity and mortality. Countries in sub-Saharan Africa have attempted to remedy this... -
Mobile-based Verification in Anti-counterfeit Commodity Supply Chain Management Systems
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Simon Mwaniki Gachago --- Applegene Pharmacy Limited,This article describes a proposed system that integrates a mobile-based solution to fight counterfeit products and uses the supply chain system to illustrate the solution. The system, referred to as the anti-counterfeit commodity supply chain management system, provides a network... -
Protecting wood with a water repellent/ paint combination
Item type: Journal Article • Journal: South African Forestry Journal • Authors: J.D. van Zyl --- , W.J. van Wyk --- ,The influence of high and/or low solids water repellent on the durability of an alkyd enamel paint on P. radiata was investigated. Apart from increasing the drying time of the first paint coat, a low solids water repellent proved a... -
Responses of Eucalyptus species to fertilizer applications made at planting on granitic parent materials in the Mpumalanga and Northern Provinces of South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: ColleenA. Carlson --- , South Africa Ross Allan --- , South Africa Samuel Soko --- , South AfricaEarly research trials in South Africa have shown that Eucalyptus species generally respond positively to the addition of nutrients at planting. However, as most of these research trials were located in KwaZulu-Natal, it was important to investigate the nature ofthe... -
Modelling growth and water use in four Pinus patula stands with the 3-PG model
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors:Accurate prediction ofgrowth andyield offorest plantations remains importantto the forestry industry for such purposes as assessing the benefits ofsilvicultural practices, matching species to site, understanding economic risks, predicting profitability and scheduling harvests. Conventional methodology is based on statistically-derived stand growth... -
Acacia mearnsii sensitivity to the application of pre-emergent herbicides applied at planting
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: KeithM. Little --- , South AfricaFive pre-emergent herbicides were applied either on their own or in various combinations to commercially planted Acacia mearnsii De Wild. seedlings in the KwaZulu-Natal Midlands. Acacia mearnsii growth responses to the protected or unprotected application of these herbicides were compared... -
The estimation of the growing stock of eucalypt plantation forests, based on spectral signatures of satellite imagery, in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Christoph Kätsch --- Faculty of Forestry, Germany Anthonie van Laar --- Faculty of Forestry,The present study deals with the application of spectral signatures, obtained from multispectral satellite images, in order to obtain regression estimates for the timber volume per unit area. The studies were carried out in South African Eucalyptus plantations. The grayscale... -
Using chlorophyll fluorescence to determine stress in Eucalyptus grandis seedlings
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Carol A. Rolando --- , Keith M. Little --- ,Since several environmental factors affect the functioning of the photosynthetic system, the status of the photosynthetic apparatus is a good indicator of the plant in terms of stress and stress adaptation. The measurement of chlorophyll fluorescence with a portable fluorimeter... -
Effects of temperature on Pinus patula seedlings growing in pots in a controlled environment
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Colleen A. Carlson --- Horticultural Science Department, South Africa Ross Allan --- Shaw Research Centre, South Africa Andrew R. Morris --- Shaw Research Centre, South AfricaThe re-establishment of Pinus patula seedlings into sites with high harvesting residue (slash) loads can negatively affect the survival of these plants. Field trials have examined the role that insect pests and fungal diseases play in causing this phenomenon. Research... -
The effect of the colonisation extent of arbuscular mycorrhizal fungi on the growth of pot grown Pterocarpus angolensis seedlings
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S.N. Hengar --- Department of Forest Science, USA A.J. Valentine --- Department of Environmental Science, USA J.M. Theron --- Department of Forest Science, USAThe effect of the level of arbuscular mycorrhizal fungi (AMF) colonisation on the growth of Pterocarpus angolensis was studied. Mycorrhizal infected seedlings, showing either good or poor growth, under the same environmental conditions (temperature, humidity, light level) were analyzed for... -
Seedling recruitment of Colophospermum mopane on the Highveld of Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: D. Mlambo --- Department of Forest Resources and Wildlife Management, Zimbabwe P. Nyathi --- Department of Forest Resources and Wildlife Management, ZimbabweFactors controlling seedling recruitment of Colophospermum mopane (Kirk ex. Benth) Kirk ex. J. Leonard were investigated on the high veld of Zimbabwe. Seed germination and seedling survival and growth were monitored under canopy and outside canopy microhabitats for a period... -
Spatial changes in forest cover on the KwaNibela Peninsula, St Lucia, South Africa, during the period 1937 to 2008
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: BM Corrigan --- Department of Botany and Plant Biotechnology, South Africa M Kneen --- Department of Geography, Environmental Management and Energy Studies, South Africa CJ Geldenhuys --- Department of Forest and Wood Science, South Africa B-E van Wyk --- Department of Botany and Plant Biotechnology, South AfricaThe KwaNibela Peninsula is situated in the northernmost region of Lake St Lucia in KwaZulu-Natal. It is covered by forest patches of either Sand Forest or Coastal Forest within the Maputaland Coastal Vegetation. The area and the forests are heavily... -
Physiological responses of Eucalyptus nitens × nitens under experimentally imposed water stress
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MEO Mokotedi --- School of Biological and Conservation Sciences, Biological Sciences Building, South Ring Road, Westville Campus, South AfricaThis study reports on how a cold- and frost-tolerant clone of Eucalyptus nitens × nitens responds to drought stress. The aim was to identify physiological traits that contribute to drought acclimation. Macropropagated saplings were grown in a climate-controlled greenhouse in... -
Phosphorus fertiliser source and weed control effects on growth of three-year-old second-rotation Pinus radiata on Orthic Pumice soil in New Zealand
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: AA Rivaie --- , Indonesia P Loganathan --- Soil and Earth Sciences, Institute of Natural Resources, New ZealandLittle information is available on the interactive effects of soluble and less-soluble phosphorus (P) fertilisers and weed control on growth and P nutrition of second-rotation Pinus radiata plantations. A study was initiated on three-year-old second-rotation P. radiata and to determine... -
Rapid estimation of kraft pulp yield and lignin in Eucalyptus camaldulensis and Leucaena leucocephala by diffuse reflectance near-infrared spectroscopy (NIRS)
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: P Ramadevi --- , India R Meder --- , Australia M Varghese --- , IndiaNear-infrared spectroscopy has been used to develop calibration models for the rapid determination of kraft pulp yield (KPY) and lignin in Eucalyptus camaldulensis and Leucaena leucocephala. The correlation coefficient for cross-validation is 0.90 for KPY and 0.95 for lignin prediction,... -
The impact of community-based forest management on timber treeregeneration in north-eastern Honduras, with specific reference tobig-leaf mahogany (Swietenia macrophylla)
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: M Kukkonen --- Department of Biological and Environmental Sciences, FinlandReduced-impact logging is used to minimise the negative effects of selective logging. However, it has been suggested that low-impact logging may create too little disturbance for the regeneration of the light-demanding timber tree species, hence compromising forest productivity. This study... -
A single dominant Ganoderma species is responsible for root rot of Acacia mangium and Eucalyptus in Sumatra
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MPA Coetzee --- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), South Africa BD Wingfield --- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), South Africa GD Golani --- , Indonesia B Tjahjono --- , Indonesia A Gafur --- , Indonesia MJ Wingfield --- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), South AfricaGanoderma root rot is the most serious disease affecting commercially planted Acacia mangium in plantations in Indonesia. Numerous Ganoderma spp. have been recorded from diseased trees of this species and to a lesser extent Eucalyptus, causing confusion regarding the primary... -
Pruning quality affects infection of Acacia mangium and A. crassicarpa by Ceratocystis acaciivora and Lasiodiplodia theobromae
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: M Tarigan --- Department of Microbiology and Plant Pathology, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South Africa MJ Wingfield --- Department of Microbiology and Plant Pathology, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South Africa M van Wyk --- Department of Genetics, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South Africa B Tjahjono --- , Indonesia J Roux --- Department of Microbiology and Plant Pathology, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, South AfricaPruning (singling) is a common silvicultural practice in commercial Acacia plantations because these trees tend to have multiple stems. The wounds resulting from pruning are susceptible to infection by pathogens. Ceratocystis acaciivora and Lasiodiplodia theobromae have been shown recently to... -
Lasiodiplodia species associated with dying Euphorbia ingens in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JA van der Linde --- Department of Microbiology and Plant Pathology, DST/NRF Centre of Excellence in Tree Health Biotechnology, Forestry and Agricultural Biotechnology Institute, South Africa DL Six --- College of Forestry and Conservation, Department of Ecosystem and Conservation Sciences, USA MJ Wingfield --- Department of Microbiology and Plant Pathology, DST/NRF Centre of Excellence in Tree Health Biotechnology, Forestry and Agricultural Biotechnology Institute, South Africa J Roux --- Department of Microbiology and Plant Pathology, DST/NRF Centre of Excellence in Tree Health Biotechnology, Forestry and Agricultural Biotechnology Institute, South AfricaVarious species of Euphorbia occur in South Africa, including herbaceous, succulent and woody types. The largest of the succulent Euphorbia spp. in South Africa is Euphorbia ingens. These trees have been dying at an alarming rate in the Limpopo province... -
Nutrient fluxes in rainfall, throughfall and stemflow in Eucalyptus stands on the Zululand coastal plain, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: SB Dovey --- , South Africa B du Toit --- Department of Forest and Wood Science, South Africa W de Clercq --- Department of Soil Science, South AfricaAtmospheric deposition was assessed at two sites over a four-year period in post-canopy-closure (mature) Eucalyptus stands in the northern Dukuduku and southern KwaMbonambi commercial plantation forestry areas of Zululand, South Africa. The aim of this study was to determine the... -
Potential of Phytophthora pinifolia to spread via sawn green lumber: a preliminary investigation
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: R Ahumada --- , Chile A Rotella --- , Chile B Slippers --- Department of Genetics, Forestry and Agricultural Biotechnology Institute, South Africa MJ Wingfield --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute, South AfricaPhytophthora pinifolia causes the needle and shoot disease of Pinus radiata in Chile known as Daño Foliar del Pino. Although P. pinifolia is primarily a needle pathogen, there are concerns that it might be spread to new environments via the... -
The socioeconomic impact of the phasing out of plantations in the Western and Southern Cape regions of South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: M Carien de Beer --- Department of Forest and Wood Science, South Africa Cori Ham --- Department of Forest and Wood Science, South Africa Dirk W Längin --- Mondi, South Africa Francois Theron --- School of Public Leadership, South AfricaThis study investigates the possible socioeconomic impact of the phasing out of nearly 22 500 ha of plantations within the Southern and Western Cape regions of South Africa as a result of a decision made by government in 2000. Data... -
Long-term population effect of male circumcision in generalised HIV epidemics in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Michel GarenneThis paper examines the complex relationship between male circumcision and HIV prevalence and incidence in sub-Saharan African countries that have generalised epidemics. In South Africa, the mean yearly HIV incidence and an estimate of the net reproduction rate of the... -
Uptake of voluntary counselling and testing for HIV by pregnant women in a prevention-of-mother-to-child-transmission programme at Aminu Kano Teaching Hospital, Nigeria
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: HadizaS Galadanci Zubairu Iliyasu Jamilu Tukur Mariya Muktar-Yola SolomonI AdelekeMother-to-child transmission is the main mode of HIV infection among children in developing countries. In 2003, as a result of government policy, a prevention-of-mother-to-child-transmission (PMTCT) programme was introduced at Aminu Kano Teaching Hospital in Nigeria. The aim of this study... -
Perspectives of South African school children on HIV/AIDS, and the implications for education programmes
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: AltaC Van DykThe study explores and describes South African school children's perspectives of HIV and AIDS, and links this to their respective cognitive developmental stage. The paper highlights developmental differences in the children's perceptions of HIV or AIDS and makes specific recommendations... -
Conceptions of mental health among Ugandan youth orphaned by AIDS
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Sheila Harms Ruth Kizza Joshua Sebunnya Susan JackThe AIDS epidemic has disproportionately affected developing or low-income sub-Saharan African countries. Within the context of the epidemic, children and youth are at risk of losing their parents at an early age. The experience of orphanhood due to AIDS has... -
The phenomenology of bodily care: caregivers' experiences with AIDS patients before antiretroviral therapies in Lesotho
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: MokhantšoG MakoaeThis study provides an account of caregivers' experiences with the bodily care of AIDS patients before antiretroviral therapies were available in the public health sector in Lesotho. It describes the mechanisms through which the body may become a stressor in... -
Sex differentials in the use of centres for voluntary counselling and testing for HIV in Cameroon
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Emmanuel Ngwakongnwi Hude QuanPart of the strategic response to HIV in Cameroon, West Africa, has been the institutionalisation of voluntary testing and counselling (VCT) for HIV services across the country. The study addresses the general level of awareness and use of VCT centres... -
Fostering children affected by AIDS in Richards Bay, South Africa: a qualitative study of grandparents' experiences
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Evalyne Nyasani --- , United Kingdom Erna Sterberg --- , South Africa Helen Smith --- , United KingdomGrandparents are increasingly becoming the primary carers of children orphaned by the HIV epidemic in South Africa. Traditional family roles are being reversed as aging family members take responsibility for the physical and psychosocial needs of children. This study uses... -
Ethnographic experiences of HIV-positive nurses in managing stigma at a clinic in rural Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Margaret Kyakuwa --- Amsterdam School for Social Science Research, The NetherlandsThis paper explores the workplace experiences of HIV-positive nurses and their attempts to manage HIV/AIDS stigma. An HIV diagnosis can have a major impact on an individual's psychological and emotional wellbeing. Moreover, caring for those suffering from chronic HIV-related illnesses... -
Experiences of collaboration, coordination and efficiency in the delivery of HIV/AIDS home-based care in Zimbabwe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: John Mazzeo --- Department of Anthropology, United States Loveness Makonese --- Department of Sociology and Anthropology, South AfricaThe difficulties of achieving successful collaboration between stakeholders can lead to uncoordinated and fragmented outcomes for HIV/AIDS programming, which has consequences for the immediate health and livelihood security of the intended beneficiaries. This article examines the collaboration between local, national... -
Mangrove litter production and organic carbon pools in the Mngazana Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Anusha Rajkaran JanineB AdamsWood harvesting is reducing the density of adult mangrove trees in the Mngazana Estuary. This is expected to decrease the amount of litter produced as well as the availability of organic carbon to the estuary and the nearshore environment. Pools... -
Temporal trends in total phosphorus, temperature, oxygen, chlorophyll a and phytoplankton populations in Hartbeespoort Dam and Roodeplaat Dam, South Africa, between 1980 and 2000
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CarinE van Ginkel MichaelJ SilberbauerEutrophication, phytoplankton blooms and changes to the phytoplankton composition are some of the problems facing the managers of Hartbeespoort Dam and Roodeplaat Dam. Trends, both decreasing and increasing, are visible in the phosphorus concentrations, temperatures, dissolved oxygen concentrations and chlorophyll... -
Algal communities associated with aquatic macrophytes in some artificial ponds in Nyando District, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Balthazar Mpawenayo Christine CocquytThis study describes the algal communities of six ponds colonised by aquatic macrophytes in Nyanza Province, Kenya. Plankton samples were collected from the water column and epiphytic samples from macrophytes such as Azolla, Pistia, Nymphaea, Ipomoea and Ludwigia. Pond pH,... -
Composition, abundance, distribution and seasonality of larval fishes in the Mngazi Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: P Pattrick NA Strydom TH WooldridgeWe investigated the larval fish assemblage in the intermittently-open Mngazi Estuary, in the subtropical/warm-temperate biogeographic boundary region of South Africa. Larvae were collected by means of boat-based plankton tows in summer and winter for a period of three years between... -
Water quality and plankton dynamics in two small dams in Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Tamuka Nhiwatiwa BrianE MarshallTwo small dams on the Munwahuku River was investigated in relation to the influence of hydrology on their water chemistry over the period January 2000–August 2001. The water level of the upper dam fluctuated more than that of the lower... -
Environmental impact of seasonal integrated aquaculture ponds ('fingerponds') in the wetlands of Lake Victoria, Kenya: an assessment, with the aid of Bayesian Networks
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Julius Kipkemboi AnneA van Dam Patrick DennyThe potential effect on ecosystem integrity of the use of natural wetlands for seasonal wetland fishponds ('fingerponds'), integrated with vegetable production for livelihood demands, was evaluated using experimental sites at Lake Victoria, Kenya. Soluble reactive phosphorous and total phosphorus, ammonium,... -
The relationship between temperature and standard rate of metabolism in African lungfish, Protopterus aethiopicus, from Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AshleyW Seifert LaurenJ ChapmanThe relationship between temperature and metabolism among ancient (non-teleost) fishes, while largely unknown, is essential to an understanding of the effects of temperature on fish energetics. This study quantifies the effect of temperature on the standard rate of metabolism in... -
Large allozyme variation within populations and isozyme differences between Clarias gariepinus and C. ngamensis from the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Herman van der Bank Nico SmitAn allozyme study of 47 Clarias gariepinus and 53 C. ngamensis individuals revealed variation at 11 (57.9%) and eight (40%), out of 19 and 20 loci, respectively. The average heterozygosity of 0.167, 57.9% polymorphism and average of 1.895 alleles at... -
Changes in algal composition and environmental variables in the high-altitude Mohale Dam — an important water supply reservoir to South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Sanet Janse van Vuuren Nicolene van der Walt Annelie SwanepoelWhereas limited knowledge exists on the ecology and algae present in Lesotho's high-altitude Katse Dam, nothing is published about these aspects in the linked Mohale Dam, completed in 2003. This study investigated the changes in algal composition and associated environmental... -
Influence of environmental factors on seasonal changes in clupeid catches in the Kigoma area of Lake Tanganyika
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IA Kimirei YD MgayaAn investigation into the relationship between the fluctuating physico-chemical environment and variability in fish catches in the Kigoma, Tanzania, area of Lake Tanganyika was conducted from January to December 2003. Catch per unit effort (kg fishing unit–1 night–1) showed two... -
The response of the diatom flora of St Lucia Lake and estuary, South Africa, to a severe drought
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GC Bate PA SmailesLake St. Lucia, South Africa's largest estuarine system, was isolated from the sea by a beach berm throughout a severe drought from 2002 to 2007, with the lake water level being extremely low over much of its total area. A... -
Trends analysis relating to pollution in Sakumo Lagoon, Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Ruby Asmah Hedrick Dankwa CA Biney CC AmankwahSakumo Lagoon, situated near Accra, is a Ramsar-listed coastal wetland threatened by urban and agricultural waste, being located in an urban area where access to domestic and waste disposal facilities is a major problem. The aim of this study was... -
The impact of invasive fish and invasive riparian plants on the invertebrate fauna of the Rondegat River, Cape Floristic Region, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: StevenR Lowe DarraghJ Woodford DeanN Impson JennyA DayInvasive fish and plants are widespread in the rivers and riparian zones of the Cape Floristic Region of South Africa and represent potential threats to the highly endemic freshwater fauna. We investigated the impact of invasive smallmouth bass (Micropterus dolomieu)... -
Lake Victoria water resources management challenges and prospects: a need for equitable and sustainable institutional and regulatory frameworks
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GB LuiloCurrent issues relating to water utilisation, pollution and management in Lake Victoria, as well as legislative and regulatory history governing the management of the Lake Victoria Basin are reviewed. The articles of the agreements, many of which are now outdated,... -
Effect of an impoundment on nutrient dynamics in the Kihansi River, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RJ Ideva J Machiwa F Schiemer T HeinThe impact of the Kihansi Dam on electrical conductivity, pH, temperature and dissolved oxygen in the Kihansi River was assessed in 2005 after 85% of the original river flow had been diverted to the Lower Kihansi power plant. The results... -
Macroinvertebrate colonisation of artificial substrates in a Nigerian river I: gravel and leaf litter
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JO Olomukoro U OkologumeBenthic macroinvertebrate colonisation of artificial gravel and leaf litter substrates over periods of four to 40 days was examined in the Ogba River, Benin City, Nigeria. Of all the assemblages of organisms identified (398 individuals, 27 taxa) on different substrates,... -
Effect of salinity on growth of juvenile silver kob, Argyrosomus inodorus (Teleostei: Sciaenidae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HL Ferreira NG Vine CL Griffiths H KaiserAs part of the evaluation of new aquaculture species, the effect of environmental factors on growth, food conversion ratio and survival should be tested. In this study silver kob, Argyrosomus inodorus, were reared for 98 days at three salinities, of... -
Trophic interactions amongst the plankton in the temporarily open/closed East Kleinemonde Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EL Allan PW FronemanThe trophic interactions between bacteria, phytoplankton, nanoflagellates (2–20 μm), microzooplankton (20–200 μm) and mesozooplankton (200–2 000 μm) were investigated in winter and summer in the temporarily open/closed East Kleinemonde Estuary, Eastern Cape. During winter the phytoplankton community was dominated by... -
A laboratory assessment of the potential molluscicidal potency of Jatropha curcas aqueous extracts
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MJ Chimbari CJ ShiffPreliminary laboratory studies were conducted to determine the molluscicidal potency of Jatropha curcas, the physic nut. Biomphalaria glabrata and Bulinus globosus snails were exposed to varying concentrations of aqueous extracts of crushed J. curcas seeds from unripe, ripe and overripe... -
Remediation of eutrophic water using Lemna minor in a controlled environment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AA Ansari FA KhanThe growth response of common duckweed Lemna minor was studied at various temperature and pH levels for its possible application for remediating eutrophic waters. The dry weight, chlorophyll a, nitrogen, phosphorus, potassium, peroxidase (POD), catalase (CAT) and malondialdehyde (MDA) levels... -
Composition and abundance of the zooplankton community in the Bitter Lakes, Egypt, in relation to environmental factors
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RA El-BassatThe taxonomic composition of the zooplankton community of the Bitter Lakes, Egypt, was examined in 2003–2004 in relation to the spatial and temporal distribution of environmental factors. Copepoda were dominant, forming 49% of the zooplankton, followed by Protista at 37%... -
Plankton assemblages and environmental gradients in the middle reaches of the Imo River, Niger Delta, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Zabbey FD Sikoki J EdoghotuPlankton communities and physical variables in c. 5 km of the middle reaches of the Imo River, subject to sand dredging and oil/gas exploration, were surveyed in 2003 providing a preliminary checklist of plankton assemblages in relation to environmental parameters... -
Alterations in serum protein fractions and Na+-K+ATPase activity in Clarias gariepinus infested with henneguyosis in Ismailia, Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DM Sabri MA Danasoury IAM Eissa HM KhouraibaTotal serum protein, protein fractions and Na+-K+ATPase activity were estimated in Clarias gariepinus collected from surface waters in Ismailia governorate, Egypt. Comparisons were made between fish infested with respiratory henneguyosis and non-infested fish. Results of serum analysis revealed a significant... -
The breeding period of the ocellated spiny eel Mastacembelus vanderwaali (Teleostei: Mastacembelidae) in the Batoka Gorge, Zambezi River
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JL MinshullIn late October 1990, Mastacembelus vanderwaali was found to be breeding in the Zambezi River in the Batoka Gorge in protected areas along a rocky shoreline during the low water period prior to the start of the November rains. Two... -
Does Serranochromis altus (Teleostei: Cichlidae) exist in the Okavango Delta, Botswana?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FH van der Bank M Wink M Soekoe N SmitTwo possibly synonymous fish species in the Okavango Delta, Botswana, Serranochromis altus and S. angusticeps, were compared. Ecological data, morphometrics, meristics, allozymes, and genomic fingerprints — generated with six Inter-Simple Sequence Repeat (ISSR) analyses, and DNA barcoding primers — were... -
Sexual dimorphism in two pure cichlid species, Oreochromis niloticus niloticus (Linnaeus 1758) and Sarotherodon melanotheron melanotheron Rüppel 1852, and their intergeneric hybrids
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Toguyéni B Fauconneau C Mélard A Fostier J Lazard E Baras ER Kühn S van der Geyten J-F BaroillerGrowth performances and sexual growth dimorphism were compared in two pure species of tilapia, Oreochromis niloticus niloticus (OO) and Sarotherodon melanotheron melanotheron (SS), and their reciprocal intergeneric hybrids (male O. n. niloticus × female S. m. melanotheron [OS] and male... -
The role of ornamental goldfish Carassius auratus in transfer of some viruses and ectoparasites to cultured fish in Egypt: comparative ultra-pathological studies
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MA Mahmoud --- Department of Pathology, Faculty of Veterinary Medicine, Egypt SM Aly --- , Egypt AS Diab --- , Egypt G. John --- Department of Biotechnology, IndiaGoldfish, common carp and Nile tilapia were sampled between September 2002 and May 2003 to investigate lesions induced by viral diseases and ectoparasites. Goldfish exhibited neoplasms, Dermocystidium sp., Ichthyophthirius multifiliis (Ich), Trichodina reticulata, Lernaea cyprinacea and systemic infections. Neoplastic and... -
Gonad development in the freshwater oyster Etheria elliptica (Bivalvia: Etheriidae) in northern Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Ampofo-Yeboah --- Department of Renewable Natural Resources, M Owusu-Frimpong --- Department of Applied Biology, K Yankson --- School of Biological Sciences,Gonad development in the freshwater oyster Etheria elliptica from the White Volta River at Nawuni and the Oti River at Sabari (northern Ghana) was studied by histological examination from March to July 1999. Five developmental stages—developing, ripening, ripened, spawning and... -
Zooplankton composition, abundance and distribution in selected south and west coast estuaries in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PH Montoya-Maya --- Department of Ichthyology and Fisheries Science, South Africa NA Strydom --- , South AfricaIn order to contribute to the understanding of estuarine zooplankton dynamics in cool-temperate systems, zooplankton samples were collected by plankton tows, using two modified WP2 nets, in nine estuaries on the south and west coasts of South Africa, seasonally between... -
Photosynthetic differences between Microcystis aeruginosa and Oscillatoria simplicissima in relation to species succession in the Vaal River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Venter --- School of Environmental Sciences and Development (Botany Division), S du Plessis --- School of Environmental Sciences and Development (Botany Division), PDR van Heerden --- School of Environmental Sciences and Development (Botany Division), AJ Strauss --- School of Environmental Sciences and Development (Botany Division), J Bezuidenhout --- School of Environmental Sciences and Development (Botany Division),In 1991 Oscillatoria simplicissima replaced Microcystis aeruginosa in the Vaal River, South Africa. This study explored the reason for this succession by looking at the photosynthetic performance of these two cyanoprokaryotes at different temperatures, light intensities and N:P ratios. Microcystis... -
Seasonal distribution and activity of nitrogen-cycling bacteria in Bardawil Lagoon, Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Dewedar --- Department of Botany, Egypt M Bahgat --- Faculty of Sciences, Egypt EE Shabana --- Department of Botany, EgyptThe ecological significance of Bardawil Lagoon, the only oligotrophic hypersaline lagoon on the Mediterranean coast of Egypt, was assessed through studying counts, activities and the distribution of nitrogen-cycling bacteria. Counts and activities of ammonifying bacteria, ammonium-oxidising microbes (AOM) and nitrite-oxidising... -
Low allozyme variation in tigerfish Hydrocynus vittatus (Teleostei: Alestidae) from the Okavango panhandle, with notes on the selection of candidates for artificial breeding
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Soekoe --- Centre for Aquatic Research, Department of Zoology, South Africa NJ Smit --- Centre for Aquatic Research, Department of Zoology, South Africa H van der Bank --- Centre for Aquatic Research, Department of Zoology, South AfricaTo ensure the utilisation of optimal tigerfish gene pools for artificial propagation, the hypothesis that tigerfish from the Okavango system should have greater heterozygosity than those from smaller river systems was tested. This electrophoretic analysis provides the first report of... -
Blood lactate levels as a biomarker for angling-induced stress in tigerfish Hydrocynus vittatus from the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NJ Smit --- Centre for Aquatic Research, Department of Zoology, South Africa G Howatson --- Centre for Aquatic Research, Department of Zoology, South Africa R Greenfield --- Centre for Aquatic Research, Department of Zoology, South AfricaAlthough critical in catch-and-release angling, no data are available on angling-induced stress in African gamefish. Blood lactate levels were used as a biomarker for angling-induced metabolic stress in tigerfish caught by angling in the Okavango Delta, Botswana. Blood was drawn... -
Towards the development of environmental indices for the Namibian shelf, with particular reference to fisheries management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CH Bartholomae AK van der PlasThe Namibian Ministry of Fisheries and Marine Resources has the task of collecting and providing relevant oceanographic information for management of their fisheries. However, quality information is difficult to provide because of the complexity of the processes involved in the... -
A benthic survey of the rocky reefs off Pondoland, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Celliers BQ Mann AHH Macdonald MH SchleyerA subtidal marine biodiversity survey was carried out on shallow reefs (−1m to −30m) in the proclaimed Pondoland Marine Protected Area between Port Edward and Port St Johns, South Africa. A total of 26 benthic reef transects was undertaken involving... -
Movement pattern and home range of Roman Chrysoblephus laticeps
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SE Kerwath A Götz CG Attwood PD Cowley WHH SauerThe movement behaviour of adult Roman Chrysoblephus laticeps (Sparidae) was investigated using mark-and-recapture techniques in the Goukamma Marine Protected Area (GMPA) and the Tsitsikamma National Park (TNP) on the South African temperate south coast. The study was designed to improve... -
Management of avian cholera Pasteurella multocida outbreaks on Dyer Island, South Africa, 2002–2005
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LJ Waller LG UnderhillIn 2002 there was a widespread epizootic involving seabirds on five of the offshore islands of the Western Cape, South Africa. Since then, avian cholera Pasteurella multocida outbreaks have been occurring annually on one of these islands, Dyer Island. This... -
Diving behaviour of African penguins: do they differ from other Spheniscus penguins?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PG Ryan SL Petersen A Simeone D GrémilletAfrican penguins Spheniscus demersus closely resemble Magellanic S. magellanicus and Humboldt S. humboldti penguins and have similar breeding and feeding ecologies. Adults feed on pelagic schooling fish in continental shelf waters, but African penguins have been reported to have shallower... -
Area utilisation and activity patterns of roman Chrysoblephus laticeps (Sparidae) in a small marine protected area
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SE Kerwath A Götz CG Attwood WHH Sauer CG WilkeInformation on the movement of fish is vital to determine the effectiveness of marine protected areas (MPAs) for fish conservation and fisheries management. This study investigates area utilisation and activity patterns of 13 adult roman Chrysoblephus laticeps (Sparidae) using telemetry... -
Application of a chlorophyll index derived from satellite data to investigate the variability of phytoplankton in the Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H Demarcq R Barlow L HutchingsThe spatial and temporal variability in phytoplankton biomass in the Benguela ecosystem was investigated over an 8-year period using a chlorophyll index (Chl Index) derived from low resolution SeaWiFS ocean colour data. Monthly composite images revealed that the surface chlorophyll... -
Comparative morphology of the oropharyngeal cavity of clinid fish (Perciformes: Clinidae), with particular attention to the form, number and distribution of taste buds, and dentition
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: O Gon L Fishelson Y DelareaThe present study compares the form, number and distribution of taste buds (TB) in the oropharyngeal cavity (OC) of 17 species of clinid fish (Perciformes, Blennioidei, Clinidae) from different geographical regions (Australia, Taiwan, South Africa), and includes observations on dentition... -
Comparison of the effects of different linefishing methods on catch composition and capture mortality of South African temperate reef fish
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Götz SE Kerwath CG Attwood WHH SauerThe effects of hook size, bait type, water depth and fishing effort on the selectivity and capture mortality of reef fish were investigated in a standardised fishing experiment on the temperate south coast of South Africa. A total of 2... -
Decline of demersal resources in North-West Africa: an analysis of Mauritanian trawl-survey data over the past 25 years
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Gascuel P Labrosse B Meissa MO Taleb Sidi S GuénetteMauritania is characterised by fast-growing fisheries that have developed over the past decades. Since 1982, scientific trawl surveys have been conducted regularly, allowing assessment of the impact of this increasing fishing pressure on exploited species as well as on demersal... -
A visual and acoustic survey for harbour porpoises off North-West Africa: further evidence of a discrete population
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: O Boisseau J Matthews D Gillespie C Lacey A Moscrop N El OuamariThe distribution of harbour porpoises Phocoena phocoena in southern Europe and along the Atlantic African coast is poorly understood, with tentative assessments suggesting a discrete West African population with a northern limit around the Straits of Gibraltar. This study describes... -
Assessment of the charter-boat fishery in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Pradervand R van der ElstThe South African KwaZulu-Natal charter-boat fishery was assessed by means of a socio-economic questionnaire survey and catch inspections during the period August 2003–November 2004. In all, 38 charter operators were interviewed and 135 catch inspections undertaken. Of a total of... -
Spatial distribution of Nemesis lamna Risso 1826 (Copepoda: Siphonostomatoida: Eudactylinidae) on the gills of white sharks Carcharodon carcharias off KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Dippenaar R van Tonder S Wintner P ZunguThe selection of a specific site of attachment by a copepod parasite is determined by a set of mostly unknown factors. The spatial distribution of Nemesis lamna on the gill filaments of white sharks Carcharodon carcharias was investigated. The complete... -
Divergent trends in bank cormorants Phalacrocorax neglectus breeding in South Africa's Western Cape consistent with a distributional shift of rock lobsters Jasus lalandii
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford AC Cockcroft BM Dyer L UpfoldIn South Africa's Western Cape Province, numbers of bank cormorants Phalacrocorax neglectus breeding at 11 localities decreased from above 500 pairs during 1978–1987 to 350 pairs from 1995 to 2006. The most northern colony (Lambert's Bay) was extinct by 1999... -
Influences of the abundance and distribution of prey on African penguins Spheniscus demersus off western South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford LG Underhill JC Coetzee T Fairweather LJ Shannon AC WolfaardtOff South Africa, anchovy Engraulis encrasicolus and sardine Sardinops sagax are the main prey of African penguins Spheniscus demersus. The combined spawner biomass of these fish increased from less than one million t in 1996 to more than nine million... -
Comparing internal and external drivers in the southern Benguela and the southern and northern Humboldt upwelling ecosystems
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LJ Shannon S Neira M TaylorTrophic models of three upwelling ecosystems, the southern Benguela (South African), southern Humboldt (Chilean) and northern Humboldt (Peruvian) systems, have been fitted to catch, abundance and fishing mortality time-series. Three drivers were considered during the model fitting: internal forcing by... -
Balanus glandula: from North-West America to the west coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Simon-Blecher Z Granevitze Y AchituvWe report the occurrence of the North-East Pacific intertidal barnacle Balanus glandula in the south-western African shores of the Atlantic Ocean. In addition, an attempt is made to trace the origin of the South African population by comparing the distribution... -
The effect of marine protected areas on an exploited population of sex-changing temperate reef fish: an individual-based model
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SE Kerwath A Götz CG Attwood WHH SauerThe effect of two marine protected areas (MPAs) on roman Chrysoblephus laticeps (Sparidae), an exploited reef-fish species inhabiting the South African temperate south coast, was simulated with a spatially explicit, individual-based model based on geographically correct habitat distribution. The model... -
Changes in the trophic structure of the southern Benguela before and after the onset of industrial fishing
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KE Watermeyer LJ Shannon CL GriffithsDespite a human presence in the Benguela region for at least one million years, exploitation of marine resources by European seafarers only began in earnest in the 1400s. Ecopath with Ecosim was used to construct and compare mass-balanced foodweb models... -
Changes in the trophic structure of the northern Benguela before and after the onset of industrial fishing
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KE Watermeyer LJ Shannon J-P Roux CL GriffithsExploitation of marine resources has been occurring in the northern Benguela ecosystem for centuries. Understanding the cumulative long-term effects of this exploitation is important toward effective management of the modern system. Retrospective mass-balanced models of the ecosystem have been constructed,... -
Impact of the Treasure oil spill on African penguins Spheniscus demersus at Dassen Island: case study of a rescue operation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Wolfaardt LG Underhill R Altwegg J Visagie AJ WilliamsThe bulk ore carrier MV Treasure sank between Robben and Dassen islands off western South Africa in June 2000. Although releasing less oil than the Apollo Sea spill six years earlier, the number of African penguins Spheniscus demersus oiled (approximately... -
Restoration of oiled African penguins Spheniscus demersus a decade after the Apollo Sea spill
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Wolfaardt LG Underhill R Altwegg J VisagieThe bulk ore carrier Apollo Sea sank south-west of Dassen Island off western South Africa in June 1994, oiling approximately 10 000 African penguins Spheniscus demersus, most of which were collected from Dassen Island. A total of 4 076 de-oiled... -
Morphological identification of primary settlers and post-larvae of three mussel species from the coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Bownes NP Barker CD McQuaidThe study of mussel settlement and recruitment requires the ability to identify the larvae of co-existing species. On the south coast of South Africa, an introduced (Mytilus galloprovincialis) and two indigenous (Choromytilus meridionalis and Perna perna) mussel species co-exist and... -
Records of Fraser's dolphin Lagenodelphis hosei Fraser 1956 from the Gulf of Guinea and Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CR Weir J Debrah PK Ofori-Danson C Pierpoint K Van WaerebeekAlthough Fraser's dolphins Lagenodelphis hosei are considered to inhabit deep tropical waters worldwide, their occurrence in the tropical eastern Atlantic Ocean from the Gulf of Guinea southwards to Angola is only represented by two specimen records from Ghana. During cetacean... -
Breeding success of African penguins Spheniscus demersus at Dassen Island, especially after oiling following the Apollo Sea spill
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Wolfaardt LG Underhill DC Nel AJ Williams J VisagieThe reproductive success of African penguins Spheniscus demersus at Dassen Island from 1994 to 2000 was variable, but much higher than previously reported figures for the species. Breeding success was positively related to the abundance of anchovy Engraulis encrasicolus and... -
Effects of herbivore grazing on the physiognomy of the coralline alga Spongites yendoi and on associated competitive interactions
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GW Maneveldt DW KeatsThe territorial gardening limpet Scutellastra cochlear occurs along the south and southern west coasts of South Africa, whereas one of its primary food items, the encrusting coralline alga Spongites yendoi, extends much farther north along the West Coast. A combined... -
Impact of flipper-banding on breeding success of African penguins Spheniscus demersus at Robben Island: comparisons among silicone rubber bands, stainless-steel bands and no bands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PJ Barham LG Underhill RJM Crawford TM Leshoro DA BoltonFrom 2001 to 2006, two new designs of flipper bands made from silicone rubbers were tested on African penguins Spheniscus demersus at 365 nests on Robben Island, South Africa. We compared, over six years, the breeding success, from hatching to... -
Reproductive system and the spermatophoric reaction of the mesopelagic squid Octopoteuthis sicula (Rüppell 1844) (Cephalopoda: Octopoteuthidae) from southern African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HJT Hoving MR Lipiński JJ VidelerReproductive features of the poorly known oceanic squid Octopoteuthis sicula are described and quantified to gain insight into the reproductive biology of the species. The data are based on 39 complete and partial specimens from southern African waters, collected between... -
A multidisciplinary study of a small, temporarily open/closed South African estuary, with particular emphasis on the influence of mouth state on the ecology of the system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AK Whitfield JB Adams GC Bate K Bezuidenhout TG Bornman PD Cowley PW Froneman PT Gama NC James B Mackenzie T Riddin GC Snow NA Strydom S Taljaard AI Terörde AK Theron JK Turpie L van Niekerk PD Vorwerk TH WooldridgeIn 2005/2006 a multidisciplinary research programme that included studies on the hydrodynamics, sediment dynamics, macronutrients, microalgae, macrophytes, zoobenthos, hyperbenthos, zooplankton, ichthyoplankton, fish and birds of the temporarily open/closed East Kleinemonde Estuary was conducted. Particular attention was given to the responses... -
Genetic characterisation of oyster populations along the north-eastern coast of Tunisia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Dridi MS Romdhane S Heurtebise ElM Cafsi P Boudry S LapègueThe taxonomy of oysters has been traditionally based on characteristics of the shell. More recently, the analysis of protein and DNA polymorphism has provided a means to overcome difficulties in distinguishing the different species of oysters based solely on shell... -
Ciguatera: the detection of neurotoxins in carnivorous reef fish from the coast of Cameroon, West Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Bienfang B Oben S DeFelice P Moeller K Huncik P Oben R Toonen T Daly-Engel B BowenThis work examined 64 large, carnivorous reef fish from the coastal waters of Cameroon for toxicity commonly associated with an incidence of ciguatera fish poisoning. The samples were also subjected to m-DNA analyses to confirm their taxonomic identification. The analyses... -
Achievements and lessons learned from the Benguela Environment, Fisheries, Interaction and Training (BENEFIT) research programme
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Hampton N SweijdThis paper considers the scientific achievements of the Benguela Environment, Fisheries, Interaction and Training (BENEFIT) Programme as reflected in 29 internally evaluated BENEFIT research projects carried out between 1998 and 2007 when the programme ended, and draws a number of... -
Comparison of moult phenology of African penguins Spheniscus demersus at Robben and Dassen islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Wolfaardt LG Underhill RJM CrawfordDassen and Robben islands are approximately 50 km apart, and currently support the largest and third largest populations of African penguins Spheniscus demersus respectively. At both islands, moult is the most synchronised and seasonal activity of the annual cycle. The... -
Review of the rescue, rehabilitation and restoration of oiled seabirds in South Africa, especially African penguins Spheniscus demersus and Cape gannets Morus capensis, 1983–2005
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Wolfaardt AJ Williams LG Underhill RJM Crawford PA WhittingtonSouth Africa is a global hotspot for oil pollution. The regional oiled seabird cleaning centre, the South African Foundation for the Conservation of Coastal Birds (SANCCOB), has handled over 50 000 seabirds from its inception in 1968 until 2005. The... -
Sightings of killer whales Orcinus orca from longline vessels in South African waters, and consideration of the regional conservation status
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AJ Williams SL Petersen M Goren BP WatkinsKiller whales Orcinus orca are seldom reported from South African nearshore waters but, allowing for the bias of vessel attraction, observations from longline vessels suggest there is a resident offshore population of fish-eating killer whales. We present reports of killer... -
Primary production in the Benguela ecosystem, 1999–2002
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Barlow T Lamont B Mitchell-Innes M Lucas S ThomallaPhytoplankton production was investigated throughout the whole Benguela ecosystem in winter 1999 and in summer 2002 during two four-week research cruises from Cape Town, South Africa, through Namibian waters to Namibe in southern Angola. Primary production ranged from 0.14–2.26 g... -
Breeding and moult phenology of African penguins Spheniscus demersus at Dassen Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Wolfaardt --- , South Africa LG Underhill --- Animal Demography Unit, Department of Zoology, South Africa J Visagie --- , South AfricaThe breeding and moult phenology of African penguins Spheniscus demersus at Dassen Island form part of a variable annual cycle. Between 1994 and 2006, African penguins bred throughout the year. Most of this period was characterised by favourable feeding conditions... -
Why do we need to integrate population genetics into South African marine protected area planning?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S von der Heyden --- Evolutionary Genomics Group, Department of Botany and Zoology, South AfricaSouth Africa is home to a wide variety of marine flora and fauna distributed over at least three biogeo-graphic provinces. Currently, 9% of the coastline is protected by ‘no-take’ marine protected areas (MPAs), but the distribution of MPAs is uneven... -
Optimisation of underwater visual census and controlled angling methods for monitoring subtidal temperate reef fish communities
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RH Bennett --- Department of Ichthyology and Fisheries Science, South Africa A Götz --- , South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South Africa PD Cowley --- , South Africa RM Palmer --- , South AfricaStandardised sampling protocols for monitoring fish stocks are essential to assess changes in stock status and provide a means to evaluate the effectiveness of fisheries management measures, such as marine protected areas (MPAs). This study aimed to optimise two standard... -
Variations in the dominant algal bloom-forming species in the western South China Sea from 1993 to 2007
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CL Liu --- Key Laboratory of Tropical Marine Environmental Dynamics, and Key Laboratory of Marine Bio-resources Sustainable Utilization, China DL Tang --- Key Laboratory of Tropical Marine Environmental Dynamics, and Key Laboratory of Marine Bio-resources Sustainable Utilization, China SF Wang --- Key Laboratory of Tropical Marine Environmental Dynamics, and Key Laboratory of Marine Bio-resources Sustainable Utilization, China L Nguyen-Ngoc --- , VietnamThe study investigated the spatial and temporal variations of harmful algal bloom (HAB) species in the western South China Sea (SCS) for the period 1993-2007, using in situ HAB and remotely sensed datasets. A significant change in the dominant bloom... -
Do inter-colony differences in Cape fur seal foraging behaviour reflect large-scale changes in the northern Benguela ecosystem?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Skern-Mauritzen --- , Norway SP Kirkman --- Animal Demography Unit, Department of Zoology, South Africa E Olsen --- , Norway A Bjørge --- , Norway L Drapeau --- , France MA Meÿer --- Department of Environmental Affairs, South Africa J-P Roux --- Ministry of Fisheries and Marine Resources, Namibia S Swanson --- Department of Environmental Affairs, South Africa WH Oosthuizen --- Department of Environmental Affairs, South AfricaThe northern Benguela ecosystem adjoining Namibia has undergone considerable changes in recent decades, with reductions and northwards shifts of key prey species that have had severe implications for marine top predator populations. We investigated how such environmental variability may impact... -
Recent population estimates and trends in numbers of albatrosses and giant petrels breeding at the sub-Antarctic Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PG Ryan --- , South Africa MGW Jones --- , South Africa BM Dyer --- Department of Environmental Affairs, South Africa L Upfold --- Department of Environmental Affairs, South Africa RJM Crawford --- Department of Environmental Affairs, South AfricaThe second mid-summer survey of surface-nesting seabirds at the Prince Edward Island group (Marion and Prince Edward islands) was conducted during December 2008, seven years after the initial mid-summer survey. Wandering albatrosses Diomedea exulans may have decreased slightly at Prince... -
Recent trends in numbers of Crozet shags breeding at the Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Department of Environmental Affairs, South Africa PG Ryan --- , South Africa BM Dyer --- Department of Environmental Affairs, South Africa L Upfold --- Department of Environmental Affairs, South AfricaNumbers of Crozet shags Phalacrocorax [atriceps] melanogenis breeding at Marion Island decreased by more than 70% from 840 pairs in 1994/1995 to 220 pairs in 2003/2004 and then increased to some 500 pairs in 2008/2009. The trends are thought to... -
Summer survey of fur seals at Prince Edward Island, southern Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MN Bester --- Mammal Research Institute, Department of Zoology and Entomology, South Africa PG Ryan --- , South Africa J Visagie --- , South AfricaThe onshore distributions and the abundances of Antarctic fur seals Arctocephalus gazella and Subantarctic fur seals A. tropicalis were determined at Prince Edward Island during 16-20 December 2008. This repeats a survey conducted in December 2001 and extends the area... -
Comparative salinity tolerances of four siphonariid limpets in relation to habitat restriction of the rare and endangered Siphonaria compressa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Wilson --- Marine Biology Research Centre, Department of Zoology, South Africa GM Branch --- Marine Biology Research Centre, Department of Zoology, South Africa P de Coito --- Marine Biology Research Centre, Department of Zoology, South AfricaThe salinity tolerances of four South African species of limpet in the genus Siphonaria were experimentally tested, in the context that one of them, S. compressa, is South Africa's most endangered marine mollusc and is restricted to two lagoonal localities... -
Distribution, behaviour and photo-identification of Atlantic humpback dolphins Sousa teuszii off Flamingos, Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CR Weir --- , UKAtlantic humpback dolphins Sousa teuszii are a priority for research due to their restricted geographic range, narrow ecological niche and the paucity of existing information. The distribution and behaviour of S. teuszii off Flamingos, southern Angola, was investigated during summer... -
Seasonal nutrient fluctuation in selected plant species in the Kalahari
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: FH Stapelberg MW van Rooyen J du P BothmaSeasonal changes in crude protein, phosphorus and calcium contents of five common plant species in the south-western Kalahari were investigated. Three species that are browsed by springbok (Acacia erioloba, Grewia flava and Rhigozum trichotomum) and two grass species (Schmidtia kalahariensis... -
Phenotypic plasticity and local adaptation in two extreme populations of Acacia karroo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G Bayonne Mboumba D WardPhenotypic plasticity is the effect of growth variability in response to different environmental conditions. Adaptive phenotypic plasticity is more specific; it is the ability of a single genotype to produce an array of phenotypes depending on the environmental extent. We... -
Soil erosion in the Herschel district of South Africa: changes over time, physical correlates and land users' perceptions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S VetterSoil erosion in rangelands is widely believed to be caused primarily by overgrazing. The aims of this study, conducted in a severely eroded district under communal tenure, were to establish (1) how the extent and severity of soil erosion have... -
Dynamics of woody vegetation in a semi-arid savanna, with a focus on bush encroachment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M-L Britz D WardIncreases in the tree: grass ratio with accompanying changes in herbaceous composition, called bush or shrub encroachment, is a worldwide phenomenon in savanna regions. Although heavy grazing by livestock is often believed to be the cause, it is clear that... -
Induced chemical defences in Colophospermum mopane trees
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: DCJ Wessels C van der Waal WF de BoerA field experiment was conducted in which Mopane (Colophospermum mopane) trees were subjected to three different canopy treatments:felling of trees at a mean height of 0.7m above ground level, felling at a height of 2m, or pruning of selected branches... -
Qualitative evaluation of four subtropical grasses as standing hay: diet selection, rumen fermentation and partial digestibility by sheep
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: WA van Niekerk --- Department of Animal and Wildlife Sciences, South Africa Abubeker Hassen --- Department of Animal and Wildlife Sciences, South AfricaThe nutritive value of four subtropical grasses (Panicum maximum, Anthephora pubescens, Digitaria eriantha and Chloris gayana) standing hay were compared in terms of qualitative intake and partial digestibility by sheep. The species differed significantly in terms of diet quality selected... -
On the Hopf-James Homomorphism over B
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Michihiro SakaiWe define the Hopf-James homomorphism and the Whitehead product in the category of fibrewise pointed spaces over B. Making use of them, we generalize Hardie-Jansen's result and obtain that a version of the generalized Hopf construction gives rise to an... -
On extension of isometries between unit spheres of L∞ and E
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Lei Li Weiyun RenIn this paper, we study the extension of isometries between the unit spheres of L ∞ and a normed space E. We find a condition under which an isometric mapping between the unit spheres can be extended to a linear... -
Epimorphisms of metric frames
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bernhard Banaschewski Aleš PultrThis paper deals with several aspects of epimorphisms in the category MFrm of metric frames and contractive homomorphisms. In particular, it is shown that i. the epicomplete metric frames are uniquely determined by the power-set lattices of sets,... -
Pairings of Sheaves of A-Modules
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Anastasios Mallios PatriceP. NtumbaIt is proved that for any free A-modules F and ε of finite rank on some C-algebraized space (X,A) a degenerate A-bilinear morphism Φ : F × ε → A induces a non-degenerate A-bilinear morphism Φ : F/ε ⊥ ×... -
On Almost f-Algebras
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mohamed Ali ToumiFor an Archimedian vector lattice A and a Dedekind complete vector lattice B, it is shown that if a positive bimorphism ψ0 from A × A to B satisfies the (AF) property (the image of each pair of disjoint elements... -
Characterization of Vector Fields on the Frölicher Standard n-Simplex, Imbedded in R n , and Hamiltonian Formalism on Differential Spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: PatriceP. Ntumba AugustinT. BatubengeThis paper is an attempt to the symplectization of smooth unusual, but standard imbedded subspaces of R n like a n-simplex, for the purpose of modelling Hamiltonian and Lagrangian systems thereon. We show that these subspaces are obtained by the... -
An Answer to a Question on the Affine Bijections on C(X, I)
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Zafer Ercan Süleyman ÖnalA complete description of the bijective affine map on C(X, I) is given. This provides an answer to a question of [2] on the affine bijections on C(X, I). -
Jordan homomorphisms between algebras of measurable operators
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Martin WeigtWe prove that every self-adjoint algebra homomorphism between algebras of measurable operators is continuous and can be expressed as a sum of a self-adjoint algebra homomorphism as well as a self-adjoint algebra anti-homomorphism. We also provide sufficient conditions under which... -
Notes on Cuntz-Krieger uniqueness theorems and C*-algebras of labelled graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bernhard BurgstallerIn this note we deal with Cuntz-Krieger uniqueness theorems and extend the class of algebras introduced in [3]. We use this analysis to show two Cuntz-Krieger uniqueness theorems for C*-algebras of labelled graphs. -
Designs from the groups PSL2(q) for certain q
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: M.R. Darafsheh --- School of Mathematics, College of Science, Iran A. Iranmanesh --- Department of Mathematics, Faculty of Basic Sciences, Iran R. Kahkeshani --- Department of Mathematics, Faculty of Basic Sciences, IranUsing primitive actions of the projective special linear groups PSL2(q), q = 37, 41, 43, 47 and 49 some 1-designs are constructed. The automorphism group of all the constructed designs are found. It is shown that all subgroups of the... -
Graph Compositions and Flats of Cycle Matroids
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Eunice Mphako-Banda --- School of Mathematics, RSAWe give an alternative method for counting the number of graph compositions of any graph G. In particular we show that counting the number of graph compositions of a graph G is equivalent to counting the number of flats of... -
Heritability of shoot die-back and root biomass in sixteen Pterocarpus angolensis (Fabaceae) half-sib families from Malawi, Namibia and Zambia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JP Mwitwa CRY Munthali G van WykThe experiment was conducted to ascertain narrow-sense heritability (h 2) and the family-within-provenance variation in shoot die-back, taproot length and root biomass of half-sib Pterocarpus angolensis families from Malawi, Namibia and Zambia. Provenances differed significantly in shoot die-back for both... -
Phenotypic variation among five provenances of Pterocarpus angolensis in Zimbabwe and Zambia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: E Chisha-Kasumu S Woodward A PriceThe feasibility of utilising morphological markers for determining existing provenance variation in the African savanna tree Pterocarpus angolensis was assessed. Five provenances were used: Mtao, Gokwe, Nyazura, Chesa (Zimbabwe) and Kapirimposhi (Zambia). Two weeks after germination, seedlings were inoculated with... -
Using high-resolution satellite imagery and double sampling as a cost-effective means of collecting forest inventory data – the case of Hans Kanyinga Community Forest, Namibia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JM Kamwi C KätschThe present study deals with the use of high-resolution satellite imagery in forest inventory of the open savanna woodlands of southern Africa. The study was carried out in Hans Kanyinga Community Forest, north-eastern Namibia. A two-phase (double) sampling design was... -
Effects of leaf and tree age on chlorophyll absorbance in diploid black wattle (Acacia mearnsii)
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: A Fossey S Mathura SL Beck-PayThe invasiveness of black wattle (Acacia mearnsii) in South Africa has created a need to investigate ways to reduce seed production. The Institute for Commercial Forestry Research is investigating polyploidy production with the view to inducing reduced fertility. Accurate, reliable... -
Genetic control of wood density and bark thickness, and their correlations with diameter, in pure and hybrid populations of Eucalyptus grandis and E. urophylla in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: ECL Retief TK StangerTree diameter under and over bark at breast height (dbh), wood density and bark thickness were assessed on samples from control-pollinated families of Eucalyptus grandis, E. urophylla, E. grandis × E. urophylla and E. urophylla × E. grandis. The material... -
A diverse assemblage of Botryosphaeriaceae infect Eucalyptus in native and non-native environments
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: B Slippers T Burgess D Pavlic R Ahumada H Maleme S Mohali C Rodas MJ WingfieldThe Botryosphaeriaceae cause endophytic infections of leaves and bark of various trees, including Eucalyptus, and they apparently persist in this state for extended periods of time. Under conditions of stress, these fungi cause many different disease symptoms on Eucalyptus, of... -
Genetic parameters of pure and hybrid populations of Eucalyptus grandis and E. urophylla and implications for hybrid breeding strategy
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: ECL Retief TK StangerIn order to review Sappi Forests' breeding strategy for E. urophylla × E. grandis hybrids, information is required regarding the genetic control of certain traits and the correlations between them. A hybrid seedling progeny trial was planted, comprising material generated... -
Damage to foliage and stems caused by fungal pathogens in young eucalypt plantations in Zambia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: A Muimba-Kankolongo --- School of Natural Resources, Zambia IN Nawa --- School of Agricultural Sciences, Zambia J Roux --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute, South Africa P Ng'andwe --- School of Natural Resources, ZambiaPlantations consisting of non-native tree species were established on the Copperbelt of Zambia to supplement timber supply from natural forests and to meet the increasing demand of round wood and fuel wood for the copper mines. In early 2004, a... -
Results from six Pinus taeda nursery trials with the herbicide pendimethalin in the USA
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: DB South --- School of Forestry and Wildlife Sciences and Alabama Agricultural Experiment Station, USA TE Hill --- School of Forestry and Wildlife Sciences and Alabama Agricultural Experiment Station, USAPendimethalin is used by some nursery managers to control weeds in Eucalyptus and Pinus seedbeds and cutting beds of Pinus. Six trials were implemented in open-rooted seedbeds to test the response of Pinus taeda to postemergence (to the crop) applications... -
Productivity gains by fertilisation in Eucalyptus urophylla clonal plantations across gradients in site and stand conditions
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JM de Aguiar Ferreira --- , Brazil JL Stape --- Department of Forestry and Environmental Resources, USANutrition management in Eucalyptus plantations is fundamental for sustaining high production. Fertilisation is routinely used to improve tree nutrition, providing profitable returns on large investments. Growth responses to fertilisation differ dramatically among sites, however, so efficient investment decisions in fertilisation... -
Image-based reflectance conversion of ASTER and IKONOS imagery as precursor to structural assessment of plantation forests in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MT Gebreslasie --- School of Environmental Sciences, South Africa FB Ahmed --- School of Environmental Sciences, South Africa JAN van Aardt --- Laboratory for Imaging Algorithms and Systems, Center for Imaging Science, USAReflectance-converted imagery is a requirement for establishing temporally robust remote sensing algorithms, given the reduction of time-specific atmospheric effects. Thus, in this study image-based atmospheric correction methods for ASTER and IKONOS imagery for retrieving surface reflectance of plantation forests in... -
Shoot allometry of Jatropha curcas
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: SB Ghezehei --- Department of Plant Production and Soil Science, South Africa JG Annandale --- Department of Plant Production and Soil Science, South Africa CS Everson --- Department of Plant Production and Soil Science, South AfricaThe South African government has banned planting of Jatropha curcas L. (Jatropha), potentially a multipurpose tree and biofuel source, owing to insufficient knowledge about the species. Use of allometry as a non-destructive method of monitoring growth and biomass attributes of... -
Historic and recent (2006) state of mangroves in small estuaries from Mlalazi to Mtamvuna in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: A Rajkaran --- Botany Department, South Africa J Adams --- Botany Department, South Africa R Taylor --- , South AfricaThe new forest type classification considers mangroves to be the rarest and most threatened of forest types in South Africa. The aim of this study was to determine the change in distribution and the current population and community structure of... -
Climate and growth influences on wood formation and utilisation
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: GM Downes DM DrewWood is produced by a complex sequence of interactions between gene–protein expression and the local environment. It is produced by the vascular cambium, an essentially two-dimensional surface of meristematic cells covering the tree stem. The growth of any individual cambial... -
Understanding and adding value to Eucalyptus fibre
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: CRE Clarke B Palmer D GoundenEucalyptus wood has become one of the most important hardwood resources for pulp mills worldwide. Furthermore, bleached Eucalyptus pulp is used extensively both in paper-making globally where it is included in such diverse products as tissue, packaging, as well as... -
Why is there Philosophy of Mathematics AT ALL?
Item type: Journal Article • Journal: South African Journal of Philosophy • Authors: Ian Hacking --- Collège de France and University of Toronto,Mathematics plays an inordinate role in the work of many of famous Western philosophers, from the time of Plato, through Husserl and Wittgenstein, and even to the present. Why? This paper points to the experience of learning or making mathematics,... -
Phylogenetic relationships and genetic diversity of Nemesis Risso, 1826 species found on different elasmobranch host species off the KwaZulu-Natal coast, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Mangena --- Department of Biodiversity, South Africa BP Jordaan --- Department of Biodiversity, South Africa SM Dippenaar --- Department of Biodiversity, South AfricaMembers of the order Siphonostomatoida (Copepoda) are generally poorly described from South African waters. Nemesis is one of 12 genera in the family Eudactylinidae and includes about nine species. In this study, we investigated whether there is any population structure... -
Female-biased mortality in African penguins
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Pichegru --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, Department of Zoology, South Africa NJ Parsons --- Southern African Foundation for the Conservation of Coastal Birds, South AfricaSex-biased mortality can increase the risk of extinction of threatened populations. Numbers of the endangered African penguin Spheniscus demersus are decreasing rapidly and the smaller size of females, associated with their higher foraging effort during the breeding season, may place... -
Stable isotope evidence of food web connectivity by a top predatory fish (Argyrosomus japonicus: Sciaenidae: Teleostei) in the Kowie Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Bergamino --- Department of Zoology and Entomology, South Africa T Dalu --- Department of Zoology and Entomology, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa L Carassou --- Department of Zoology and Entomology, South Africa NB Richoux --- Department of Zoology and Entomology, South AfricaIn this study, food web connectivity within the Kowie Estuary on the south-east coast of South Africa was evidenced by the trophic behaviour of the predominantly piscivorous Argyrosomus japonicus. We examined stable isotopes of carbon (δ13C) and nitrogen (δ15N) in... -
Confirmation of the occurrence of a second killer whale morphotype in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PB Best --- Mammal Research Institute, Whale Unit, South Africa MA Meÿer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa M Thornton --- Mammal Research Institute, Whale Unit, South Africa PGH Kotze --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa SM Seakamela --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa GJG Hofmeyr --- Port Elizabeth Museum at Bayworld, Port Elizabeth, and Department of Zoology, South Africa S Wintner --- KwaZulu-Natal Sharks Board, Umhlanga Rocks, and Biomedical Resource Unit, South Africa CD Weland --- Canadian Centre for DNA Barcoding, Biodiversity Institute of Ontario, Canada D Steinke --- Canadian Centre for DNA Barcoding, Biodiversity Institute of Ontario, CanadaKiller whales Orcinus orca occur worldwide in a number of morphotypes that differ in size, pigmentation, acoustic behaviour, food type and genetics – some may indeed warrant subspecific or even specific status. Until recently, all killer whales in South African... -
Congruent, decreasing trends of gentoo penguins and Crozet shags at sub-Antarctic Marion Island suggest food limitation through common environmental forcing
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa BM Dyer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa L Upfold --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa AB Makhado --- Branch: Oceans and Coasts, Department of Environmental Affairs, South AfricaNumbers of gentoo penguins Pygoscelis papua and Crozet shags Phalacrocorax [atriceps] melanogenis breeding annually at Marion Island, one of South Africa's Prince Edward Islands in the South-West Indian Ocean, were strongly correlated over 19 split-years from 1994/1995 to 2012/2013. Both... -
Factors affecting diet, habitat selection and breeding success of the African Crowned Eagle Stephanoaetus coronatus in a fragmented landscape
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Christopher J Swatridge --- School of Biosciences, UK Ara Monadjem --- All Out Africa Research Unit, Department of Biological Sciences, Swaziland David J Steyn --- , South Africa Garth R Batchelor --- , South Africa Ian CW Hardy --- School of Biosciences, UKThis study aimed to identify variables that affect habitat selection and nesting success of the African Crowned Eagle Stephanoaetus coronatus, the largest forest raptor, in north-eastern South Africa. A preference for nesting in the Northern Mistbelt Forest vegetation type was... -
Alternative approaches to Red-billed Quelea Quelea quelea management: mass-capture for food
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Clive CH Elliott --- Blue Barn House, South Leigh, UK Boaz N Mtobesya --- Plant Health Services, Tanzania Robert A Cheke --- Natural Resources Institute, UKOrganophosphate pesticide spraying or the deployment of explosives as standard practices for controlling quelea breeding colonies or roosts that threaten small-grain crops in Africa have negative side-effects on non-target birds and on the environment. Mass-capture techniques were tested as an... -
The phylogenetic affinities of the Socotra Bunting Emberiza socotrana
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Manuel Schweizer --- Naturhistorisches Museum der Burgergemeinde Bern, Switzerland Guy M Kirwan --- Field Museum of Natural History, USAThe monophyly of the African ‘brown bunting’ complex was corroborated by a recent molecular study. However, the little-known Socotran endemic Emberiza socotrana, which is morphologically similar to the other taxa in this complex, was not included. Here we present a... -
Steroid hormone concentrations and physiological toxicity of water from selected dams in Namibia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AK Faul --- Department of Biological Sciences, Namibia E Julies --- Department of Biological Sciences, Namibia EJ Pool --- Department of Medical Biosciences, South AfricaNamibia is a semi-arid to arid country and has most of its surface water in dams built on ephemeral rivers. Whilst water quality is often measured in terms of bacterial contamination and general physico-chemical characteristics, this study extends water quality... -
Water temperature affects life-cycle duration of tadpoles of Natal cascade frog
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- Centre for Water Resources Research, South Africa RJ Karssing --- Ezemvelo KZN Wildlife, South AfricaDirect and indirect effects of climate change on amphibians include range shifts and changes in community structure. The Natal cascade frog Hadromophryne natalensis has an altitudinal range of some 2 400 m in KwaZulu-Natal, and presents an opportunity to assess... -
Population dynamics of potentially harmful algal blooms in Bizerte Lagoon, Tunisia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Bouchouicha Smida --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie I Sahraoui --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie B Grami --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie H Hadj Mabrouk --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie A Sakka Hlaili --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, TunisieThe population dynamics of potentially harmful phytoplankton in the semi-closed, coastal Bizerte Lagoon, Tunisia, in the south-western Mediterranean, were examined from November 2007 to February 2009 at six sampling stations, three situated in areas of mussel and oyster farming. The... -
Invasive Australian crayfish Cherax quadricarinatus in the Sanyati Basin of Lake Kariba: a preliminary survey
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LT Marufu --- University of Zimbabwe, Zimbabwe C Phiri --- University Lake Kariba Research Station, Zimbabwe T Nhiwatiwa --- University of Zimbabwe, ZimbabweThe invasion of Cherax quadricarinatus, the Australian redclaw crayfish, in the Sanyati Basin of Lake Kariba, Zimbabwe, is reported. A total of 79 crayfish were caught at 10 out of 12 sampling sites in the Sanyati Basin in November–December 2012... -
The effect of nitrogen and sulphur on the grain yield and quality of canola (Brassica napus L.) grown in the Western Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Wonder Ngezimana --- Department of Agronomy, South Africa Gert A Agenbag --- Department of Agronomy, South AfricaOn average low grain yields of less than 1.5 t ha-1 are obtained with canola in the Western Cape province of South Africa. Injudicious use of fertiliser has been suggested as a major cause, hence the study was done to... -
Effects of soil drenching of water-soluble potassium silicate on commercial avocado (Persea americana Mill.) orchard trees infected with Phytophthora cinnamomi Rands on root density, canopy health, induction and concentration of phenolic compounds
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Theo F Bekker --- Department of Applied Plant and Soil Sciences, South Africa Nico Labuschagne --- Department of Microbiology and Plant Pathology, South Africa Terry Aveling --- Department of Microbiology and Plant Pathology, South Africa Thierry Regnier --- Department of Microbiology and Plant Pathology, South Africa Clive Kaiser --- Department of Microbiology and Plant Pathology, South AfricaAvocado root rot, caused by Phytophthora cinnamomi Rands, remains a major constraint to avocado production worldwide. In the current study effects of successive soil drench applications of soluble potassium silicate on canopy health and root density of 13-year-old Persea americana... -
Assessing the ability of fodder beet (Beta vulgaris L. ‘Brigadier’) to absorb sodium from a soil irrigated with sodium-enriched water
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Philip A Myburgh --- Agricultural Research Council–Infruitec/Nietvoorbij, South Africa Carolyn L Howell --- Agricultural Research Council–Infruitec/Nietvoorbij, South AfricaA pot experiment was carried out to determine the sodium (Na) absorption ability of halophytic fodder beet (Beta vulgaris L. ‘Brigadier’) irrigated with water enriched to Na levels found in winery wastewater. Treatments comprised (1) soil without plants irrigated with... -
Fire can suppress the development of macrophyllous thickets
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Paul Gordijn --- South African Environmental Observation Network, Grasslands, Wetlands and Forests Node, South Africa David Ward --- School of Life Sciences, South AfricaThe ingression of woody plants into savannas, known as bush or shrub encroachment, has become a global concern. Fire has been acknowledged as a key factor in managing woody vegetation in savannas. This study assessed the role of fire in... -
Vegetation change in northern KwaZulu-Natal since the Anglo-Zulu War of 1879: local or global drivers?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jennifer Russell --- School of Life Sciences, South Africa David Ward --- School of Life Sciences, South AfricaThe quality of the landscape is declining in many grassland and savanna areas of Africa as a consequence of woody plant encroachment. We investigated the changes in vegetation at selected sites on the battlefields of the Anglo-Zulu War of 1879... -
The influence of South Africa's post-apartheid land reform policies on bush encroachment and range condition: a case study of Fort Beaufort's municipal commonage
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: James R Puttick --- Plant Conservation Unit, Department of Biological Sciences, South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South Africa James Gambiza --- Department of Environmental Science, South AfricaWe examined the effect of changes in land use and land tenure on bush encroachment and vegetation condition. An analysis of aerial photographs from three time steps (1949, 1985 and 2004) was used to document changes in woody plant density... -
The impact of land use on woody plant cover and species composition on the Grahamstown municipal commonage: implications for South Africa's land reform programme
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: James R Puttick --- Plant Conservation Unit, Department of Biological Sciences, South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South Africa James Gambiza --- Department of Environmental Science, South AfricaUsing an analysis of aerial photographs from 1942, 1985 and 2004 we assessed the impact of changing land tenure and land-use regimes on the cover of thicket vegetation on the Grahamstown commonage. Land-use impacts were examined by comparing plant species... -
A century of woody plant encroachment in the dry Kimberley savanna of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: David Ward --- School of Life Sciences, South Africa M Timm Hoffman --- Plant Conservation Unit, Botany Department, South Africa Sarah J Collocott --- School of Life Sciences, South AfricaWoody plant encroachment is frequent in dry savannas. Grazing is often considered to be a major cause of encroachment in dry savannas because grasses are removed by livestock, leaving bare areas for trees to colonise in wetter years. Earlier experiments... -
Bush encroachment in southern Africa: changes and causes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Tim G O'Connor --- South African Environmental Observation Network (SAEON), South Africa James R Puttick --- Plant Conservation Unit, Department of Biological Sciences, South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South AfricaBush encroachment has been recognised in southern Africa since the late nineteenth century. Our review of 23 studies showed that the rate of woody cover change has ranged from −0.131 to 1.275% y−1. Encroachment was most rapid on small protected... -
Diabetes mellitus: preliminary health-promotion activity based on service-learning principles at a South African national science festival
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: SC Srinivas --- Faculty of Pharmacy, WM Wrench --- Faculty of Pharmacy, K Bradshaw --- Department of Computer Science, N Dukhi --- Faculty of Pharmacy,Objectives: To investigate the effects of a service-learning-based health promotion elective in influencing knowledge of diabetes mellitus (DM) and ways to prevent it. -
Imaging phaeochromocytoma
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Janse P van Rensburg --- Division of Radiodiagnosis, Department of Medical Imaging and Clinical Oncology, Faculty of Health Sciences, South AfricaThe phaeochromocytoma (pheochromocytoma) is a hormonally active tumour of neuroendocrine origin. This article reviews the embryology, anatomy, nomenclature and pathology as it relates to the imaging of phaeochromocytomas and paragangliomas. The imaging findings and the role of different imaging modalities... -
Relationship between salivary androstenedione levels, body composition and physical activity levels in young girls
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: AJ McKune --- Human Performance Laboratory, Department of Biokinetics, Exercise and Leisure Sciences, KD Du Bose --- Activity Promotion Laboratory, Department of Exercise and Sport Science, United States of AmericaBackground: High androgenic activity in adolescent girls and adult women is associated with adiposity and metabolic disturbances. This study examined the relationship between salivary androstenedione levels, body composition, and physical activity levels in young girls. -
Cut-off values of distal forearm bone density for the diagnosis of central osteoporosis in black postmenopausal South African women
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: IM Kruger --- Africa Unit for Transdisciplinary Health Research (AUTHeR), MC Kruger --- Institute of Food, Nutrition and Human Health, Massey University, New Zealand CM Doak --- Department of Nutrition and Health, The Netherlands A Kruger --- Africa Unit for Transdisciplinary Health Research (AUTHeR),Background: The objective of this study was to establish a triage cut-off point or threshold for peripheral bone mineral density (BMD), applicable to black postmenopausal women, and that could be used as a screening method to differentiate between women with... -
The use of phototherapy in the treatment of diabetic ulcers
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: B Nteleki --- Department of Podiatry, Faculty of Health Sciences, NN Houreld --- Laser Research Centre, Faculty of Health Sciences,Chronic ulcers are a common complication in diabetes. The nature of diabetic foot ulcers makes them difficult to manage and treat. A dynamic management plan is required to treat diabetic lower limb ulcerations. This involves a strategic approach, including mechanical... -
Beta-2 microglobulin as a predictor of peripheral arterial disease in diabetes: the effect of estimated glomerular filtration
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: P Rheeder --- Epidemiology and Biostatistics Track, School of Health Systems and Public Health, University of Pretoria, L Nel --- Department of Internal Medicine, Faculty of Health Sciences, F Meeuwes --- Medical Research Council Unit for Inflammation and Immunity, Department of Immunology, Faculty of Health Sciences, M Van Schendel --- Department of Internal Medicine, Faculty of Health Sciences, PWA Meyer --- Medical Research Council Unit for Inflammation and Immunity, Department of Immunology, Faculty of Health Sciences,Background: Peripheral arterial disease (PAD) is common in patients with type 2 diabetes mellitus. Its definitive diagnosis requires ultrasound or angiography. Beta-2 microglobulin (β2 microglobulin) has been proposed as a diagnostic marker for PAD. The objective of the study was... -
Atypical femoral fractures
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: I Butler --- Division of Geriatrics, Department of Medicine, B Tipping --- Division of Geriatrics, Department of Medicine, R Bhaga --- Division of Orthopaedics, Department of Surgery, -
Polycystic ovary syndrome
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: S Maharaj --- Department of Endocrinology and Metabolism, Division of Medicine, South Africa A Amod --- Department of Endocrinology and Metabolism, Division of Medicine, South Africa -
A patient with multiple phaeochromocytomas and visual loss
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: T Kemp --- Department of Endocrinology, Faculty of Health Sciences, South Africa BH Ascott-Evans --- Department of Endocrinology, Faculty of Health Sciences, South Africa -
The usage and efficacy of a combination analgesic preparation
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: M Raff --- Pain management unit, South AfricaCombination analgesics are frequently prescribed for the treatment of a multitude of conditions. Many of these preparations contain agents with no proven analgesic efficacy. We examined 3059 patients using a new combination agent containing only paracetamol, codeine, and ibuprofen. It... -
An unusual coexistence of Addison's disease and phaeochromocytoma
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: H Atmaca --- Department of Endocrinology and Metabolism, Turkey F Gokosmanoglu --- Department of Endocrinology and Metabolism, Turkey EK Kan --- Department of Endocrinology and Metabolism, Turkey GC Ecemis --- Department of Endocrinology and Metabolism, Turkey CT Bahadir --- Department of Endocrinology and Metabolism, Turkey -
Bariatric surgery: risks and recommendations for the prevention of perioperative thromboembolism
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: A Murphy --- Sunward Park Bariatric Centre of Excellence, Department of Endocrinology, M-T Van der Merwe --- Sunninghill and Lifestyle Management Park Bariatric Centre of Excellence, Department of Endocrinology, -
Case Studies: Unusual phaeochromocytomas in African families: the importance of genetic testing
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: A Krause --- Division of Human Genetics, South Africa C Feben --- Division of Human Genetics, South Africa C Van Wyk --- Division of Human Genetics, South Africa K Huddle --- Department of Medicine, Division of Endocrinology & Metabolism, South Africa FJ Raal --- Department of Medicine, Division of Endocrinology & Metabolism, South Africa -
Morphine sparing effect of low dose ketamine during patient controlled analgesia
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: FJ Smith --- Department of Anaesthesiology, CGJ Briel --- Department of Anaesthesiology, PJ Becker --- Unit for Biostatistics, South AfricaObjective: To compare the quality of intravenous patient controlled analgesia (PCIA) of low dose morphine plus ketamine with morphine. Design: Double blind case control study. Setting: Academic hospital. Patients: Thirty-six patients scheduled for elective abdominal hysterectomy were randomly divided into... -
Cardiac arrest after submucosal infiltration with lignocaine 2%—epinephrine in nasal surgery: A case report
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: SC Pawar --- Department of Anaesthesiology, India SS Patil --- Department of Anaesthesiology, India SR Jagtap --- Department of Anaesthesiology, India S Deolokar --- Department of General Surgery, IndiaA case of a 26-year-old ASA I physical status male undergoing septoplasty had an abrupt pulseless ventricular tachycardia following submucosal infiltration of lignocaine 2% with epinephrine 1: 200,000 combination. Ventricular tachycardia associated with unconsciousness and absent peripheral pulse was transient... -
Anaesthesia for a morbidly obese patient with schizophrenia and intellectual disability
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Y Asahi --- Department of Dentistry, Japan Y Kawai --- Department of Anesthesia, Japan M Sugimoto --- Department of Anesthesia, Japan T Suzuki --- Department of Anesthesia, Japan S Omichi --- Department of Dentistry, Japan J Kotani --- Department of Anesthesiology, JapanWe report the case of a morbidly obese woman with schizophrenia and intellectual disability who underwent dental treatment using general anaesthesia. The 38-year-old patient was 156 cm tall and weighed 140 kg, with a body mass index of 57.5 kg... -
Spinal anaesthesia in young patients: evaluation of needle gauge and design on technical problems and postdural puncture headache
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: VR Shah --- Department of Anaesthesia and Critical Care, Institute of Kidney Diseases and Research Centre and Institute of Transplantation Sciences, India GP Bhosale --- Department of Anaesthesia and Critical Care, Institute of Kidney Diseases and Research Centre and Institute of Transplantation Sciences, IndiaBackground: The well-known complication of spinal anaesthesia, postdural puncture headache (PDPH), is especially troublesome in young patients. The needle gauge and configuration of needle tip appear to be the important factors in reducing the incidence of PDPH; however it may... -
Anaesthetic implications of a parturient with antiphospholipid antibody syndrome
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: T Singh --- Department of Anaesthesia, India SM Ghosh --- Department of Anaesthesia, India R Agarwala --- Department of Anaesthesia, India K Rahul --- Department of Anaesthesia, India -
Entropy of the electroencephalogram as applied in the M-Entropy S/5™ Module (GE Healthcare) during increases in nitrous oxide and constant sevoflurane concentrations
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: FJ Smith --- Department of Anaesthesiology, South Africa S Spijkerman --- Department of Anaesthesiology, South Africa PJ Becker --- Biostatistics Unit, Medical Research Council, and Unit for Clinical Epidemiology, South Africa JF Coetzee --- Department of Anaesthesiology and Critical Care, South AfricaBackground: It has been suggested that spectral entropy of the electroencephalogram as applied in the M-Entropy S/5TM Module (GE Healthcare) does not detect the effects of nitrous oxide (N2O). The aim of this study was to investigate the effect on... -
Near-fatal outcome after administration of hyoscine-N-butylbromide (Buscopan®)
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: A Milner --- Department of Anaesthesia, South AfricaWhile undergoing conscious sedation for a gastroscopy, an 18-year-old female developed severe hypotension and loss of consciousness. This occurred shortly after an intravenous dose of hyoscine-N-butylbromide (Buscopan®). Resuscitation was performed over a period of 10 minutes and was successful. Once... -
Amniotic fluid embolism in an HIV-positive parturient
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: PR Penfold --- Department of Anaesthesia, South Africa C Corbett --- Department of Anaesthesia, South Africa L Bortolan --- Department of Anaesthesia, South AfricaWe present a case of a parturient infected with human immunodeficiency virus, who developed amniotic fluid embolism during the delivery of her twins by elective Caesarean section. Our management and the available literature are briefly discussed, and consideration is given... -
Change or be changed; anaesthetist accreditation in echocardiography: is it time?
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: AR Keene --- Olivedale Cardiothoracic Unit, South Africa -
Contrast-induced acute kidney injury
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: PD Gopalan --- Nelson R Mandela School of Medicine, University of Kwazulu-Natal, -
A pilot study to determine the profile of recovery room nurses in Johannesburg hospitals
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: J Scribante --- Department of Anaesthesiology, Health Sciences, HC Perrie --- Department of Anaesthesiology, Health Sciences,Background: Apart from anecdotal evidence, very little is known of the recovery room nurses in South Africa. -
Anaesthetic genetics and genomics
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: E Welch --- ,Genetic variations have always been implicated in interindividual reactions to various pharmaceutical agents. Some common genetically determined anaesthetic conditions, such as malignant hyperthermia, “scoline apnoea”, “halothane hepatitis” and porphyria, are fairly well described, and the genetic differences in enzyme, receptor... -
Anaesthetic management of tracheobronchial disruption during oesophagectomy
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: T Bindra --- Department of Anaesthesia and Critical Care, India R Gupta --- Department of Anaesthesia and Critical Care, India P Geetanjali --- Department of Anaesthesia and Critical Care, IndiaAlthough tracheobronchial injuries occur rarely during oesophagectomy, the outcome of such injuries is mostly unfavourable. We report the case of a 50-year-old female, American Society of Anesthesiologists (ASA) class 1, who suffered a tracheobronchial injury during transthoracic oesophagectomy. The defect... -
Safety of pain control with morphine: new (and old) aspects of morphine pharmacokinetics and pharmacodynamics
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: JF Coetzee --- Department of Anesthesiology and Critical Care,Background: A 26-year-old, 59 kg female was administered morphine 10 mg during tonsillectomy, and 5 mg in the recovery room. She died 5 hours after the operation. Hypoxic cerebral injury, arising from morphine side-effects, was pronounced the cause of death,... -
Case study: Managing a case of ankylosing spondylitis for inguinal hernia repair
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: G Ramanathan --- Department of Anaesthesiology, GG Jayakar --- Department of Anaesthesiology, A Kuppuswamy --- Department of Anaesthesiology, B Ramamurthy --- Department of Anaesthesiology, S Patil --- Department of Anaesthesiology,A 55-year-old man diagnosed with ankylosing spondylitis presented for inguinal hernia repair. The patient was found to have limited neck movement, thoracic kyphosis and restrictive lung disease. Surgery was performed under hernia block, which was inadequate. General anaesthesia was then... -
Case study: Anaesthesia implications and considerations in a case of pemphigus vulgaris for orthopaedic bipolar prosthesis implant surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: SJ Bajwa --- Department of Anaesthesiology and Intensive Care, J Kaur --- Department of Anaesthesiology and Intensive Care, SK Bajwa --- Department of Obstetrics and Gynaecology, G Bakshi --- Department of Anaesthesiology and Intensive Care,A 60-year-old patient suffering from pemphigus vulgaris for the past year was admitted to the emergency ward for fracture neck of femur. She also presented with lesions involving oral mucosa, back, inframammary and genital areas which were in partial remission... -
Myotonic dystrophy: a retrospective diagnosis
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: D Jain --- Department of Anaesthesiology and Intensive Care, India A Chakravarty --- Department of Anaesthesiology and Intensive Care, IndiaMyotonic dystrophy is not commonly encountered in anaesthetic practice and its existence in a patient can easily go undetected, leading to intraoperative and postoperative complications. We report a case of a 45-year-old female without any typical features of myotonic dystrophy,... -
The adverse effects of inadvertent intraoperative intravenous phenylephrine administration: a case report
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: KO Enohumah --- Department of Anaesthesia and Intensive Care Medicine, Ireland H Immanuel --- Department of Anaesthesia and Intensive Care Medicine, Ireland R Whitty --- Department of Anaesthesia and Intensive Care Medicine, Ireland J Connolly --- Department of Anaesthesia and Intensive Care Medicine, IrelandInadvertent intravenous injection of 1% phenylephrine (10 mg) induced severe hypertension and tachycardia in a previously healthy female patient undergoing elective gynaecological surgery. This medical error was investigated using the critical-incident technique that is available in our department. This case... -
The Cardiothoracic Anaesthesia Society of South Africa (CASSA) consensus paper for accreditation of anaesthetists in South Africa in perioperative echocardiography Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: A Keene --- Working Group of the Cardiothoracic Anaesthesia Society of South Africa (CASSA), S Fischer --- Working Group of the Cardiothoracic Anaesthesia Society of South Africa (CASSA), E Turton --- Working Group of the Cardiothoracic Anaesthesia Society of South Africa (CASSA), J Van Der Westhuizen --- Working Group of the Cardiothoracic Anaesthesia Society of South Africa (CASSA), A Myburgh --- Working Group of the Cardiothoracic Anaesthesia Society of South Africa (CASSA), A Milner --- Working Group of the Cardiothoracic Anaesthesia Society of South Africa (CASSA), N Mdladla --- Working Group of the Cardiothoracic Anaesthesia Society of South Africa (CASSA), J Swanevelder --- Working Group of the Cardiothoracic Anaesthesia Society of South Africa (CASSA),There is a need to develop an accreditation process for South African physicians who practise perioperative echocardiography. International level accreditation will bring legitimacy to the process of training practitioners in perioperative echocardiography and ensure standards of practice. Accreditation will be... -
The Laryngeal Mask Airway Supreme™: safety and efficacy during gynaecological laparoscopic surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: JM Beleña --- Department of Anaesthesiology and Critical Care, Spain M Núñez --- Department of Anaesthesiology and Critical Care, Spain JL Gracia --- Department of Anaesthesiology and Critical Care, Spain JL Pérez --- Department of Anaesthesiology and Critical Care, Spain J Yuste --- Department of Anaesthesiology and Critical Care, SpainBackground: Laryngeal Mask Airway Supreme™ (LMA Supreme™) is a new single-use polyvinyl chloride supraglottic device that offers gastric access. To date, studies that have tested the LMA Supreme™) for use in laparoscopic surgery have been reported. We present the largest... -
Cervical epidural anaesthesia for shoulder arthroscopy and effective postoperative physiotherapy for a frozen shoulder: a case study
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: K Marodkar --- Department of Anaesthesiology, India S Deshmukh --- Department of Anaesthesiology, IndiaShoulder arthroscopy is used to treat various diseases of the shoulder, including refractory adhesive capsulitis. Effective postoperative pain relief is critical for these patients, as the success of surgery largely depends on early and regular physiotherapy. Although traditionally, various methods... -
Transient aphasia following spinal anaesthesia in an orthopaedic patient
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: B Tripat --- Department of Anaesthesia and Critical Care, India G Ruchi --- Department of Anaesthesia and Critical Care, India T Sonika --- Department of Anaesthesia and Critical Care, IndiaA 50-year-old male [American Society of Anesthesiologists (ASA) grade II] was scheduled for lower limb orthopaedic surgery. The subarachnoid space was localised with difficulty at L3/4 interspace and 3 ml of hyperbaric bupivacaine was given. Within a few minutes, the... -
The opinion of patients at a local South Africa teaching hospital on physician-industry relations
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: R Wise --- University of KwaZulu-Natal, RN Rodseth --- University of KwaZulu-Natal,Objectives: This study aimed to determine how South African patients at a regional state hospital perceived the practice of physicians accepting gifts from the pharmaceutical industry. The physician-patient relationship is built on trust, with an understanding that the physician will... -
The use of intraoperative transoesophageal echocardiography as a monitor for haemodynamic instability during pulmonary hydatid cyst excision
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: G Picken --- Department of Anaesthetics, A Myburgh --- Department of Anaesthetics,We present the case of a patient with bilateral, pulmonary hydatid cysts who presented for cystectomy and developed life-threatening, haemodynamic instability when turned into the lateral decubitus position. Intraoperative transoesophageal echocardiography allowed for rapid interpretation of the haemodynamic collapse and... -
Thoracotomy in a spontaneously breathing neonate undergoing tracheo-oesophageal fistula repair
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: C Hosking --- Department of Anaesthesia, P Motshabi-Chakane --- Department of Anaesthesia, -
Blood is thicker than water: coagulation challenges in the perioperative period
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: P Motshabi Chakane --- Department of Anaesthesia,This manuscript serves to highlight some novel approaches to perioperative coagulation abnormalities and to address unanswered questions. -
A brief overview of transesophageal echocardiography
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: J Ender --- Department of Anesthesiology and Intensive Care Medicine, Heartcenter, Germany S Sgouropoulou --- Department of Anesthesiology and Intensive Care Medicine, Heartcenter, Germany -
Field anaesthesia of the African elephant (Loxodonta africana)
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: GF Stegmann --- Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, D Grobler --- Catchco Africa, J Zuba --- San Diego Wild Animal Park, USA -
Paravertebral block as a sole technique for the anaesthetic management of a patient with myalgic encephalomyelitis undergoing breast cancer surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Kinsley Enohumah --- Department of Anaesthesia, Intensive Care and Pain Medicine, Ireland S. Raza Mehdi --- Department of Anaesthesia, Intensive Care and Pain Medicine, Ireland Alan J. McShane --- Department of Anaesthesia, Intensive Care and Pain Medicine, Ireland Crina L. Burlacu --- Department of Anaesthesia, Intensive Care and Pain Medicine, IrelandMyalgic encephalomyelitis (ME) is a multifaceted organic disease which, owing to its non-specific multiple symptoms that include incapacitating fatigue, deeply affects the quality of life of diseased patients. It carries a perceived risk of an adverse reaction to drugs, including... -
Anaesthesia and the paediatric muscle disorders
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: RM Gray --- Red Cross War Memorial Children's Hospital,Paediatric muscle disorders have significant implications for anaesthetists. Their effects extend beyond skeletal muscle and manifestations in other organ systems are frequently seen; in addition, adverse reactions to anaesthetic drugs may result in fatality if unrecognised or inadequately treated. In... -
Perioperative care of a child with Ullrich congenital muscular dystrophy during posterior spinal fusion
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: DP Martin --- Department of Anesthesiology and Pain Medicine, Nationwide Children's Hospital, USA JD Tobias --- Department of Anesthesiology and Pain Medicine, USA S Warhadpande --- The Ohio State University School of Medicine, USA A Beebe --- Department of Orthopedic Surgery, USA J Klamar --- Department of Orthopedic Surgery, USAUllrich congenital muscular dystrophy (UCMD) is one of a group of disorders known as congenital muscular dystrophies. Severe hypotonia and early diaphragmatic involvement may lead to respiratory failure early in the disease process. We present the case of a nine-year-old... -
Klippel-Feil syndrome for scoliosis surgery: management of a potentially difficult paediatric airway, and report of false-negative motor-evoked potential
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: PCS Tan --- Department of Anaesthesiology and Intensive Care, Malaysia S Mohtar --- Department of Anaesthesiology and Intensive Care, Malaysia N Esa --- Department of Anaesthesiology and Intensive Care, MalaysiaA six-year-old girl with Klippel-Feil syndrome and throcacolumbar scoliosis was scheduled for growing rod insertion. Inhalational induction and tracheal intubation were carried out, with her neck in a neutral position. However, the patient woke up with paraplegia, despite normal intraoperative... -
Implementation Plan for a Midlevel Medical Worker for South Africa. A discussion paper
Item type: Journal Article • Journal: South African Family Practice • Authors: JFM Hugo --- Department of Family Medicine and Primary Health Care, -
Review of common cutaneous adverse drug reactions
Item type: Journal Article • Journal: South African Family Practice • Authors: MH Motswaledi --- Department of Dermatology, -
Physically abused women's experiences and expectations of medical practitioners
Item type: Journal Article • Journal: South African Family Practice • Authors: MS Jansen van Rensburg FJ Van Staden --- Department of Psychology,Background: The purpose of this study was to investigate the frequency of physically abused women's medical consultations, the anatomical location of their injuries and the perceived support given by medical practitioners. -
Relevance of Schneider's first-rank symptoms in Zulu patients with paranoid schizophrenia
Item type: Journal Article • Journal: South African Family Practice • Authors: B Schiopu --- Department of Family Medicine, Faculty of Health Sciences, M Nel --- Department of Biostatistics, Faculty of Health Sciences, LA Hiemstra --- Department of Family Medicine, Faculty of Health Sciences, B Latecki --- ,Background: The aim of this study was to examine the prevalence of Schneider's first-rank symptoms (FRS) in Zulu patients diagnosed with paranoid schizophrenia and to ascertain the diagnostic and prognostic significance of Schneider's FRS in this group. -
Strategies for the Prevention and Containment of Antibiotic Resistance
Item type: Journal Article • Journal: South African Family Practice • Authors: SY Essack --- School of Pharmacy and Pharmacology, University of Kwazulu-Natal,Antibiotic resistance may emerge by antibiotic selection pressure but is perpetuated by diverse risk factors and maintained within environments as a result of poor infection control. Population-specific drug pharmacokinetics and pharmacodynamics also play a role. The WHO, US, UK and... -
The Flemish model of training and supervision
Item type: Journal Article • Journal: South African Family Practice • Authors: HH Conradie --- University of Stellenbosch, SAH Moosa --- University of Witwatersrand, G Morris --- Nelson Mandela Medical School, C Van Deventer --- University of Witwatersrand, M Van Rooyen --- University of Pretoria, S Smith --- University of Pretoria, A Derese --- Centre for Education Development, Department of Family Medicine and Primary Health Care, Faculty of Medicine and Health Sciences, J De Maeseneer --- Head of Department of Family Medicine and Primary Health Care, -
Burning Out and In again
Item type: Journal Article • Journal: South African Family Practice • Authors: CG Ellis --- Family Physician, Hayfields Medical Centre,This paper is the third in a series on burnout. It is partly taken from notes collected from facilitating workshops on burnout in doctors. It is written as a polemic to challenge the received wisdom on this complex subject. The... -
Quality of pharmaceutical print advertising in South Africa—assessment of reproductive health advertisements 2001–2005
Item type: Journal Article • Journal: South African Family Practice • Authors: A Shaw [AN0001] AL Gray --- Department of Therapeutics and Medicines Management,Background: Pharmaceutical advertising, in a variety of forms, has been shown to influence prescribing behaviour. Regulatory systems have therefore been concerned with the quality of advertising and compliance with either imposed or self-regulatory codes of practice. Although the South African... -
Unveiling the physical therapies
Item type: Journal Article • Journal: South African Family Practice • Authors: L Alford --- School of Allied Health Professions, University of East Anglia, United KingdomEither through referral by a medical practitioner or self-referral many patients with musculoskeletal problems receive some form of physical therapy. There are several highly trained professional groups who deliver this treatment. Due to lack of regulation, however, there are also... -
The diagnosis and management of porphyria cutanea tarda (PCT)
Item type: Journal Article • Journal: South African Family Practice • Authors: MH Motswaledi --- Department of Dermatology,The porphyrias are a group of disorders in which excessive quantities of porphyrins or their precursors are produced. They are due to abnormalities in the control of the porphyrin-haem metabolic pathway. The porphyrias are classified into acute and chronic. The... -
Epidemiological profile of non-daily smokers in South Africa: implications for practice
Item type: Journal Article • Journal: South African Family Practice • Authors: OA Ayo-Yusuf --- Department of Community Dentistry and School of Health Systems and Public Health, B Szymanski --- School of Health Systems and Public Health,Background: This study sought to provide an epidemiological profile of non-daily (ND) smokers in South Africa. -
Recurrent urinary tract infections in non-pregnant adult women
Item type: Journal Article • Journal: South African Family Practice • Authors: EW Henn --- Department of Obstetrics and Gynaecology, South AfricaRecurrent urinary tract infections occur in approximately 5% of adult women. It has a significant impact on the affected women's quality of life and on health care costs. It is important to be aware of the physiologically protective factors preventing... -
Family medicine, primary health care and HIV medicine—a ‘new’ clinical speciality and its role in the South African HIV pandemic
Item type: Journal Article • Journal: South African Family Practice • Authors: DT Hagemeister --- Drakenstein subdistrict, Western Cape and Division for Family Medicine and Primary Care,Context: Because of the extent of the HIV pandemic, but also due to some specific historical conditions, HIV medicine has evolved as a field of its own in South African medicine. With the massive scale of the roll-out of antiretroviral... -
The experiences of family caregivers concerning their care of HIV/AIDS orphans
Item type: Journal Article • Journal: South African Family Practice • Authors: KE Hlabyago --- Dept of Family Medicine and PHC, Faculty of Health Sciences, South Africa GA Ogunbanjo --- Dept of Family Medicine and PHC, Faculty of Health Sciences, South AfricaIntroduction: The HIV/AIDS pandemic is reducing life expectancy and raising mortality. An increasing orphan population is perhaps the most tragic and long-term legacy of the HIV/AIDS pandemic. By 2010 sub-Saharan Africa is expected to have an estimated 50 million orphans... -
The role of doctors in provision of support for primary health care clinics in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: PH Nkosi --- Centre for Rural Health, CM Horwood --- Centre for Rural Health, K Vermaak --- Centre for Rural Health, C Cosser --- Centre for Rural Health, JL Haskins --- Centre for Rural Health,Background: Most primary health care (PHC) services in South Africa are provided by registered nurses working in clinics. Workload and scope of practice of these nurses have increased in recent years, exacerbated by widespread staff shortages. However, PHC nurses often... -
Prescribing of methylphenidate to children and adolescents in South Africa: A pharmacoepidemiological investigation
Item type: Journal Article • Journal: South African Family Practice • Authors: I Truter --- Drug Utilization Research Unit, Department of Pharmacy, South AfricaBackground: Pharmacoepidemiological studies on ADHD are limited in South Africa. The primary aim was to analyse the prescribing of methylphenidate to patients aged 18 years and younger in the private health care sector. -
Relationships between overweight, obesity and physical fitness of nine- to twelve-year-old South African children
Item type: Journal Article • Journal: South African Family Practice • Authors: L Truter --- School of Biokinetics, Recreation and Sport Science, North West University, Potchefstroom Campus, South Africa AE Pienaar --- School of Biokinetics, Recreation and Sport Science, North West University, Potchefstroom Campus, South Africa D Du Toit --- School of Education, North West University, Potchefstroom Campus, South AfricaBackground: -
Features of integrated professional training for physically disabled people in a community-based rehabilitation programme in the rural and urban areas of Congo
Item type: Journal Article • Journal: South African Family Practice • Authors: MP Lutala --- Département de Médecine de Famille, Congo (DRC) VP Masika --- Université Catholique Graben Butembo, Congo (DRC) MC Kasereka --- Université Catholique Graben Butembo, Congo (DRC) EK Kasagila --- Department of Community Health, MalawiBackground: The rehabilitation of physically disabled people has been explored from the perspectives of patients, health professionals, rehabilitation agencies, etc. However, no study has linked disability types, training programmes and career prospects. In this study, we therefore evaluated the professional... -
Reconstructed Living Lab: supporting drug users and families through co-operative counselling using mobile phone technology
Item type: Journal Article • Journal: South African Family Practice • Authors: MB Parker --- Faculty of Informatics and Design, South Africa J Wills --- School of Electronics and Computer Science, University of Southampton, United Kingdom GB Wills --- School of Electronics and Computer Science, University of Southampton, United KingdomBackground: There is a recognised problem with drug taking in South Africa. In socially deprived areas immediate help for drug users and their families is a problem. As part of their work in a community in tension, Impact Direct Ministries... -
Aphasia, an acquired language disorder
Item type: Journal Article • Journal: South African Family Practice • Authors: R Schoeman --- Department of Psychology, South Africa G Van der Merwe --- Department of Psychology, South AfricaAffecting an estimated one in every 272 South Africans, or 0.37% of the population, aphasia is a neurological condition described as “any disturbance in the comprehension or expression of language caused by a brain lesion”. -
Factors and outcomes in primary care physician retention in rural areas
Item type: Journal Article • Journal: South African Family Practice • Authors: M Glasser --- National Center for Rural Health Professions, United States of America M MacDowell --- National Center for Rural Health Professions, United States of America M Hunsaker --- National Center for Rural Health Professions, United States of America B Salafsky --- National Center for Rural Health Professions, United States of America K Nielsen --- National Center for Rural Health Professions, United States of America K Peters --- National Center for Rural Health Professions, United States of America M Meurer --- National Center for Rural Health Professions, United States of AmericaBackground: This paper examines factors influencing physicians' decisions to practise in rural communities as well as the results of a programme focused on rural recruitment and retention. -
Menopause and its effect on the female lower urinary tract
Item type: Journal Article • Journal: South African Family Practice • Authors: EW Henn --- Department of Obstetrics and Gynaecology, South AfricaSignificant hormonal changes occur at the time of menopause and this has an impact on all oestrogen-sensitive tissue. The female lower urinary tract (LUT) is no exception. Decreasing levels of oestrogen characteristic of the menopause produce symptomatic, histological and functional... -
The Phelophepa Health Care Train: a pharmacoepidemiological overview of the Western Cape in 2009
Item type: Journal Article • Journal: South African Family Practice • Authors: I Truter --- Drug Utilisation Research Unit, Department of Pharmacy, South AfricaBackground: The Phelophepa Health Care Train is the only primary healthcare train in the world. Phelophepa is an innovative initiative that attempts to make a positive difference to primary healthcare in rural South Africa. The primary aim of this study... -
Primary health eye care knowledge among general practitioners working in the Cape Town metropole
Item type: Journal Article • Journal: South African Family Practice • Authors: LM Van Zyl --- Division of Ophthalmology, South Africa N Fernandes --- Division of Ophthalmology, South Africa G Rogers --- Division of Ophthalmology, South Africa N Du Toit --- Division of Ophthalmology, South AfricaAim: The main purpose of this study was to determine whether general practitioners (GPs) in the Cape Town metropole have sufficient knowledge to diagnose and treat primary care ophthalmic conditions correctly, and to assess their own perceptions of their levels... -
The pharmacology of anxiolytics
Item type: Journal Article • Journal: South African Family Practice • Authors: K Outhoff --- Department of Pharmacology, South AfricaGiven that anxiety disorders are common and chronic and often co-morbid with both medical and psychiatric conditions, effective and safe anxiolytic drugs are in great demand. Serotonergic agents, in particular the selective serotonin reuptake inhibitors and serotonin and noradrenaline reuptake... -
Varenicline: a new pharmacotherapy for smoking cessation in primary care practice
Item type: Journal Article • Journal: South African Family Practice • Authors: N Robson --- University Malaya, MalaysiaBackground: Cigarette smoking causes significant morbidity and mortality and is a major public health concern worldwide. Primary care doctors are in a unique position that enables them to promote smoking cessation, as smokers are more aware of their health at... -
A ten-year histopathological study of generalised lymphadenopathy in India
Item type: Journal Article • Journal: South African Family Practice • Authors: GC Kamat --- SDM College of Medical Sciences and Hospital, IndiaBackground: Lymphadenopathy is a rather common clinical finding in a primary healthcare setting, and may be due to inflammatory lesions and tumours. Correlation between clinical findings and laboratory data is essential in arriving at a diagnosis. This study was undertaken... -
Somatic delusions and obsessive-compulsive disorder in schizophrenia
Item type: Journal Article • Journal: South African Family Practice • Authors: AC Lawrence --- Department of Psychiatry, ST Rataemane --- Department of Psychiatry,This review is based on a case study of a clinical presentation of schizophrenia with somatic and olfactory delusions and obsessive-compulsive symptoms (OCS). The patient was seen at the surgical out-patient department of the Dr George Mukhari Academic Hospital, Ga-Rankuwa,... -
Oropharyngeal carcinoma: a sexually transmitted disease
Item type: Journal Article • Journal: South African Family Practice • Authors: WFP Van Heerden --- Department of Oral Pathology and Oral Biology, South Africa AW Van Zyl --- Department of Periodontics and Oral Medicine, South AfricaHuman papillomavirus (HPV)-associated oropharyngeal cancer (OPC) is on the increase and accounts for 18% to 63% of OPC. It occurs mostly in young males with no other identifiable risk factors. The vast majority of HPV-associated OPC is attributable to HPV16... -
Nonerosive reflux disease as a presentation of gastro-oesophageal reflux disease
Item type: Journal Article • Journal: South African Family Practice • Authors: WM Simmonds --- Department of Internal Medicine,Up to 70% of patients with typical symptoms of gastro-oesophageal reflux disease have neither definite endoscopic oesophageal erosions nor Barrett's oesophagus on upper endoscopy. These patients suffer from nonerosive reflux disease (NERD). There is no gold standard for the diagnosis... -
Prevalence and determinants of burnout syndrome among primary healthcare physicians in Qatar
Item type: Journal Article • Journal: South African Family Practice • Authors: L Abdulla --- Primary Health Care, Qatar DM Al-Qahtani --- Primary Health Care, Qatar MG Al-Kuwari --- Primary Health Care, QatarBackground: General practitioners (GPs) in particular are prone to developing burnout syndrome, as they are frequently overloaded with the demands of caring for sick patients. This study was conducted to estimate the prevalence of burnout syndrome among primary healthcare physicians... -
A wandering spleen: A common presentation of an uncommon anomaly
Item type: Journal Article • Journal: South African Family Practice • Authors: AC Ugwu --- Department of Medical Radiography and Radiological Sciences, Faculty of Health Sciences and Technology, Nigeria CO Ogbonna --- Radiology Department, Federal Medical Centre, Nigeria AO Imo --- Radiology Department, NigeriaBackground: With the advent of real time ultrasonography of the abdomen, the spleen is no longer an inaccessible organ. Wandering spleen is a rare entity with less than 500 cases reported in literature so far. -
A method of teaching clinical problem-solving skills to primary health care student nurses
Item type: Journal Article • Journal: South African Family Practice • Authors: A Truscott --- Division of Rural Health, Department of Family Medicine, South AfricaThe article provides a description of a method of teaching a clinical problem-solving process to primary health care nurses/clinical nurse practitioners (PHC nurses). The process was developed in the Soweto PHC Nurse Training Unit over the past 30 years as... -
Secondary hypertension
Item type: Journal Article • Journal: South African Family Practice • Authors: JA Ker --- Department of Internal Medicine Faculty of Health Sciences,Secondary hypertension is rare and the diagnosis may be challenging although, on occasion, there are clinical features indicative of a specific underlying cause. The more commonly encountered causes include renal parenchymal and vascular disease, phaeochromocytoma, endocrine causes, sleep apnoea and... -
Idiopathic acquired progressive left facial hemiatrophy (Parry-Romberg syndrome) in a 21-year-old man in semi-urban, south-west Nigeria
Item type: Journal Article • Journal: South African Family Practice • Authors: FA Imarhiagbe --- Department of Medicine, Federal Medical Centre, Nigeria AO Adeoti --- Department of Medicine, NigeriaIdiopathic progressive hemifacial atrophy, or Parry-Romberg syndrome, is a rare entity, seldom described in medical texts. Though first described in 1825, as yet there are no clear-cut diagnostic criteria. It is of interest mainly because of the numerous features with... -
Reflections on the development of family medicine in the Western Cape: a 15-year review
Item type: Journal Article • Journal: South African Family Practice • Authors: B Mash --- Family Medicine and Primary Care, Stellenbosch University,This article reviews how the model of family medicine has developed over the last 15 years in the Western Cape. It is based on a series of in-depth interviews with key role players. This period coincides with the immediate post-apartheid... -
The state of affairs of the public sector mammography service in the Free State Pprovince of South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: WS Harmse --- Department of Diagnostic Radiology, Faculty of Health Sciences, CS De Vries --- Department of Diagnostic Radiology, Faculty of Health Sciences,Background: The Cancer Association of South Africa stated that breast health services in South Africa were “fragmented and not comprehensive.” The aim of study was to investigate the current state of public sector mammography in the Free State, and to... -
Evaluation of general practitioners' routine assessment of patients with diabetes in Tshwane, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: KG Leslie --- Private Practitioner, L Nkombua --- University of Pretoria,Background: Diabetes mellitus is a composite disease that, if not well managed and controlled, may lead to severe complications. To avoid or delay these debilitating complications, it is necessary for the practitioner to implement adequate management of the disease by... -
Gastro-oesophageal reflux in infants and children
Item type: Journal Article • Journal: South African Family Practice • Authors: ED Nel --- Department of Paediatrics and Child Health, Faculty of Health Sciences,Gastro-oesophageal reflux is a normal physiological phenomenon that is frequently associated with regurgitation in infants. In general, it resolves by the age of one year. Some children are more likely to have persistent symptoms and develop complications, e.g. children with... -
Infant formula for gastro-oesophageal reflux disease
Item type: Journal Article • Journal: South African Family Practice • Authors: CJW Owens --- Nutrition Information Centre, IL Labuschagne --- Nutrition Information Centre, MJ Lombard --- Nutrition Information Centre,Thickened infant formula is widely used as a first-line treatment for gastro-oesophageal reflux (GOR) in infants. The use thereof remains controversial, and conflicting evidence exists with regards to its efficiency. The safety of anti-reflux formula has been proven, with only... -
Dealing with schizophrenia in general practice
Item type: Journal Article • Journal: South African Family Practice • Authors: N Khamker --- Weskoppies Hospital,Schizophrenia is a psychiatric illness of unknown aetiology, and impairs cognition and social and occupational functioning. It is challenging in terms of the disability it causes, the unclear nature of what causes it, the complexity of diagnosis and treatment limitations... -
Hypertension and sexual dysfunction
Item type: Journal Article • Journal: South African Family Practice • Authors: JA Ker --- Department of Internal Medicine, Faculty of Health Sciences, -
Lifestyle changes for hypertension
Item type: Journal Article • Journal: South African Family Practice • Authors: V Mungal-Singh --- Heart and Stroke Foundation South Africa, -
The detection of left ventricular hypertrophy and diastolic dysfunction
Item type: Journal Article • Journal: South African Family Practice • Authors: GR Norton --- Faculty of Health Sciences, -
The pharmacology of anxiolytics
Item type: Journal Article • Journal: South African Family Practice • Authors: K Outhoff --- Department of Pharmacology, South AfricaGiven that anxiety disorders are common and chronic and often co-morbid with both medical and psychiatric conditions, effective and safe anxiolytic drugs are in great demand. Serotonergic agents, in particular the selective serotonin reuptake inhibitors and serotonin and noradrenaline reuptake... -
Eyelid problems in general practice
Item type: Journal Article • Journal: South African Family Practice • Authors: D Smit --- Department of Ophthalmology, Faculty of Health Sciences,General practitioners are often confronted with complaints regarding the eyelids. The author presents a number of clinical cases that illustrate common eyelid problems, and provides a discussion of each case to highlight the important features of the condition. Appropriate treatment... -
Sleepless in South Africa: insomnia is not just a night-time problem
Item type: Journal Article • Journal: South African Family Practice • Authors: S Moch --- Department of Pharmacy and Pharmacology,Sleep is necessary for normal growth and development. Lack of sleep causes considerable personal impairment that may impose a substantial societal burden on productivity and quality of life. Insomnia, whether transient or chronic, responds to both pharmacological and non-pharmacological interventions... -
Anti-infective ophthalmic preparations in general practice
Item type: Journal Article • Journal: South African Family Practice • Authors: D Smit --- Department of Ophthalmology Faculty of Health Sciences,Ocular infections may be bacterial, viral, fungal or parasitic in aetiology. Pharmacological preparations are available to treat infections that are caused by these groups of organisms. The majority of these preparations are intended for topical administration, although some systemically administered... -
Malaria prevention in travelling children
Item type: Journal Article • Journal: South African Family Practice • Authors: S Mathijs --- Department of Pharmacology,Preventing malaria in children is often neglected. Prevention is very important, as malaria is still a significant cause of childhood mortality. Parents must be aware that the same measures must be taken by children to avoid being bitten by mosquitoes... -
Using fourth-year medical students' reflections to propose strategies for primary care physicians, who host students in their practices, to optimise learning opportunities
Item type: Journal Article • Journal: South African Family Practice • Authors: M Van Rooyen --- Department of Family Medicine,Setting and subjects: Fourth-year medical students at the University of Pretoria are required to work with a primary healthcare practitioner for two weeks. After the preceptorship, reflective photo-story reports on the students' experiences and personal and academic growth are submitted. -
Advanced oral HIV-associated Kaposi sarcoma with facial lymphoedoema as an indicator of poor prognosis
Item type: Journal Article • Journal: South African Family Practice • Authors: L Feller --- Department of Periodontology and Oral Medicine, R Essop --- Department of Periodontology and Oral Medicine, MH Motswaledi --- Department of Dermatology, Faculty of Health Sciences, RAG Khammissa --- Department of Periodontology and Oral Medicine, J Lemmer --- Department of Periodontology and Oral Medicine,Rapidly progressive facial lymphoedoema that develops concurrently with or immediately after rapid enlargement of oral Kaposi sarcoma in human immunodeficiency virus (HIV) -seropositive persons forebodes death. Previously, we reported on three patients with HIV-associated Kaposi sarcoma who had not been... -
The gradual loss of vision
Item type: Journal Article • Journal: South African Family Practice • Authors: N Du Toit --- Division of Ophthalmology,Gradual loss of vision is a clinical problem that is encountered fairly regularly in most primary healthcare settings. Patients present with chronic, slowly progressive and generally painless visual loss. The reduction in vision is usually bilateral, though frequently asymmetrical, and... -
What's the latest on sulphonylureas in the management of type 2 diabetes?
Item type: Journal Article • Journal: South African Family Practice • Authors: Gail Mkele [AN0001]Sulphonylureas act by binding to sulphonylurea receptors and stimulating insulin secretion from pancreatic beta cells. This class of oral hypoglycaemic agents is still widely used in the management of type 2 diabetes in patients where lifestyle changes alone are insufficient... -
A South African perspective on factors that impact on the adoption and meaningful use of health information technologies
Item type: Journal Article • Journal: South African Family Practice • Authors: N Mostert-Phipps [AN0001] D Pottas --- Institute for ICT Advancement, School of ICT, Nelson Mandela Metropolitan University, M Korpela --- Institute for ICT Advancement, School of ICT, Nelson Mandela Metropolitan University School of Computing, University of Eastern Finland,Objective: Various benefits are associated with the adoption and meaningful use of health information technologies (HITs) in the healthcare sector. Despite the associated advantages with the adoption and use of HITs, the South African healthcare sector has been slow to... -
The prevalence of burnout and depression in medical doctors working in the Cape Town Metropolitan Municipality community healthcare clinics and district hospitals of the Provincial Government of the Western Cape: a cross-sectional study
Item type: Journal Article • Journal: South African Family Practice • Authors: L Rossouw --- Family Physician, Division Family Medicine and Primary Care, S Seedat --- Department of Psychiatry, RA Emsley --- Department of Psychiatry, S Suliman --- Division Family Medicine and Primary Care, D Hagemeister --- Division Family Medicine and Primary Care,Aim: This study investigated burnout and depression in medical doctors in the context of work-related conditions and the role of resilience as a modifiable factor. -
Assessment of the physical activity, body mass index and energy intake of HIV-uninfected and HIV-infected women in Mangaung, Free State province
Item type: Journal Article • Journal: South African Family Practice • Authors: Z. Hattingh --- Hotel School, M. Le Roux --- School of Design Technology and Visual Art, M. Nel --- Department of Biostatistics, Faculty of Health Sciences, C. Walsh --- Department of Nutrition and Dietetics, Faculty of Health Sciences,Background: Declining levels of physical activity at workplaces, during leisure time and when travelling, accompanied by increasing exposure to the mass media, are major determinants of the global obesity epidemic. This study aimed to assess physical activity, the body mass... -
Prevalence of end-digit preference in recorded blood pressure by nurses: a comparison of measurements taken by mercury and electronic blood pressure-measuring devices
Item type: Journal Article • Journal: South African Family Practice • Authors: OE Ayodele --- Department of Internal Medicine, SO Akinyemi --- People Living with HIV/AIDS Clinic, AO Adeniji --- Department of Obstetrics and Gynaecology, AO Akinboro --- Department of Internal Medicine, AA Popoola --- Ladoke Akintola University of Technology Teaching Hospital, Nigeria CA Alao --- Department of Nursing, NigeriaObjectives: When compared with the use of a mercury sphygmomanometer, the use of a validated digital blood pressure (BP) measuring device eliminates the risk of exposure to mercury. Digital devices are also associated with a lesser degree of end-digit preference... -
Drug interactions in primary health care in the George subdistrict, South Africa: a cross-sectional study
Item type: Journal Article • Journal: South African Family Practice • Authors: PA Kapp --- Knysna Provincial Hospital, University of Stellenbosch, AC Klop --- Department of Family Medicine and Primary Care, LS Jenkins --- Head of Unit,Objectives: To investigate the prevalence of potential drug-drug interactions in primary healthcare clinics in the George subdistrict, to determine which drugs were involved, and to identify associated risk factors. -
Is there a place for voluntary active euthanasia in modern-day medicine?
Item type: Journal Article • Journal: South African Family Practice • Authors: GA Ogunbanjo --- Department of Family Medicine and Primary Health Care, Faculty of Health Sciences, D Knapp van Bogaert --- Steve Biko Centre for Bioethics, Faculty of Health Sciences,This article discusses various ethical and legal concepts regarding euthanasia and includes notions such as physician-assisted suicide, assisted suicide, voluntary active euthanasia, killing versus letting die, indirect euthanasia and terminal sedation. Is there a difference if death is foreseen, but... -
A review of phosphodiesterase type 5 inhibitors
Item type: Journal Article • Journal: South African Family Practice • Authors: N Schellack --- Department of Pharmacy, Faculty of Health Sciences, A Agoro --- Department of Pharmacy, Faculty of Health Sciences,Currently, three phosphodiesterase type 5 (PDE5) inhibitors are available for clinical use in South Africa; sildenafil, vardenafil and tadalafil. The PDE inhibitors are used in males to treat erectile dysfunction. However, sildenafil is also registered for use in the treatment... -
A focus group study on primary health care in Johannesburg Health District: “We are just pushing numbers”
Item type: Journal Article • Journal: South African Family Practice • Authors: S Moosa --- Department of Family Medicine, A Gibbs --- Department of Family Medicine,Objectives: South Africa is striving towards a strong primary healthcare system. Since 2007, departments of family medicine have been established in Gauteng to improve quality of care through improved access to doctors, the coordination of health services and better referrals... -
The eye in systemic disease
Item type: Journal Article • Journal: South African Family Practice • Authors: M Lenake --- University of Cape Town; Groote Schuur Hospital, N Du Toit --- University of Cape Town; Groote Schuur Hospital,The eye is a unique organ which is often involved in systemic disease. Patients with systemic disease may first present with eye pathology, and patients with known systemic illnesses may need to have their eyes specifically checked for ocular complications... -
Coeliac disease
Item type: Journal Article • Journal: South African Family Practice • Authors: J Badenhorst --- Department of Internal Medicine,Coeliac disease is an autoimmune enteropathy triggered by the ingestion of gluten-containing cereals, such as wheat, rye and barley. It is estimated to occur in one per cent of people of European ancestry, and in 0.3% of black Africans. Coeliac... -
Job Retention Factors, Perceived Career Mobility and Organisational Commitment in the South African Financial Sector
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Tanzia F. Joāo --- University of South Africa, Melinde Coetzee --- University of South Africa,This study explores job retention factors, perceived career mobility and organisational commitment among early career employees. Participants were professional auditors, accountants and financial staff (N = 82) in the finance industry in South Africa (57% = females, 70% White, age... -
Anti-allergic ophthalmic drugs in general practice: which, why and when?
Item type: Journal Article • Journal: South African Family Practice • Authors: N Mohamed --- Division of Ophthalmology, Faculty of Health Sciences, DP Smit --- Division of Ophthalmology, Faculty of Health Sciences,Ocular allergies present in many different guises. They may vary from self-limiting episodes of acute allergic conjunctivitis, to potentially sight-threatening chronic conditions, such as vernal keratoconjunctivitis. This article provides a brief description of the different ocular allergic conditions to aid... -
Colds, flu and coughing: over-the-counter products for pharyngitis and tonsillitis
Item type: Journal Article • Journal: South African Family Practice • Authors: J Van Schoor --- Amayeza Information Centre,Pharyngotonsillitis is an inflammatory condition of the pharyngeal wall. Respiratory viruses are the major causes of pharyngitis, while bacteria account for 5–30% of cases. Once treatment of the underlying aetiology is considered and addressed, management of pharyngotonsillitis focuses on providing... -
An overview of pharmacotherapy-induced ototoxicity
Item type: Journal Article • Journal: South African Family Practice • Authors: Schellack Natalie --- Department of Pharmacy, Faculty of Health Sciences, Naude Alida --- Department of Pharmacy, Faculty of Health Sciences,This article provides an overview of ototoxic medication, as well as different pharmacological and audiological monitoring strategies. Although ototoxic medications play an important role in modern medicine, they also have the capacity to do great harm and lead to significant... -
Is screening for microalbuminuria in patients with type 2 diabetes feasible in the Cape Town public sector primary care context? A cost and consequence study
Item type: Journal Article • Journal: South African Family Practice • Authors: HO Ibrahim --- Division of Family Medicine and Primary Care, D Stapar --- Division of Family Medicine and Primary Care, B Mash --- Division of Family Medicine and Primary Care,Background: Type 2 diabetes contributes significantly to the burden of disease in South Africa. Proteinuria is a marker for chronic kidney and cardiovascular disease. All guidelines recommend testing for microalbuminuria because intervention at this stage can prevent or delay the... -
Evaluation of a school-based nutrition and physical activity programme for Grade 4 learners in the Western Cape province
Item type: Journal Article • Journal: South African Family Practice • Authors: KL Jacobs --- Head of Division, Division of Family Medicine and Primary Care, Faculty of Medicine and Health Sciences, B Mash --- Head of Division, Division of Family Medicine and Primary Care, Faculty of Medicine and Health Sciences, CE Draper --- University of Cape Town/Medical Research Council Research Unit for Exercise Science and Sports Medicine, J Forbes --- University of Cape Town/Medical Research Council Research Unit for Exercise Science and Sports Medicine, EV Lambert --- University of Cape Town/Medical Research Council Research Unit for Exercise Science and Sports Medicine,Objective: This study aimed to evaluate the effectiveness of the Making the Difference programme (MTDP), an education-and activity-based intervention for Grade 4 learners at primary schools in the Western Cape. -
The prediction of turnover intention by means of employee engagement and demographic variables in a telecommunications organisation
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Mandu Sibiya --- School of Applied Human Sciences, South Africa Johanna H. Buitendach --- School of Applied Human Sciences, South Africa Herbert Kanengoni --- School of Applied Human Sciences, South Africa Shaida Bobat --- School of Applied Human Sciences, South AfricaThis study sought to determine the prediction of turnover intention by employee engagement and demographic variables in a large South African information and communication technology (ICT) organisation. Cross-sectional survey data was collected from the organisation. Using a sample of 2276... -
Geology and groundwater regions to quantify primary salinity, sodicity and alkalinity in South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johannes P Nell --- Agricultural Research Council–Institute for Soil, Climate and Water, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Science, South AfricaAlthough anthropogenic salinisation and sodification has been researched extensively, little is known about the primary salinity in South Africa. This paper therefore aimed to determine the primary salinity, sodicity and alkalinity conditions for South African soils, based on geological units... -
The Human Economy Project: first steps
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: John Sharp --- The Human Economy Project, Faculty of Humanities, South Africa Theodore Powers --- The Human Economy Project, Faculty of Humanities, South Africa Vito Laterza --- The Human Economy Project, Faculty of Humanities, South AfricaThe Human Economy Project is interdisciplinary in scope, but relies extensively on anthropological research methods. These methods are an appropriate counter to the methods adopted in mainstream economics, which has been criticised for its isolation from ‘the ordinary business of... -
On law and legality in post-apartheid South Africa: insights from a migrant street trader
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Jürgen Schraten --- The Human Economy Project, Faculty of Humanities, South AfricaThis article focuses on the experience of law and legality by a migrant street trader in post-apartheid South Africa. The experiences of this stall vendor are analysed alongside theoretical notions of law and the legal system. The ways that law... -
An unusual coexistence of Addison's disease and phaeochromocytoma
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: H Atmaca --- Department of Endocrinology and Metabolism, Turkey F Gokosmanoglu --- Department of Endocrinology and Metabolism, Turkey EK Kan --- Department of Endocrinology and Metabolism, Turkey GC Ecemis --- Department of Endocrinology and Metabolism, Turkey CT Bahadir --- Department of Endocrinology and Metabolism, Turkey -
Just living: genealogic, honesty and the politics of apartheid time
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Kathleen Lorne McDougall --- Department of Anthropology, South Africa“We were just living,” I was told of growing up an Afrikaner as apartheid was born. Is it possible for living at this time to be anything but political? To say “we were just living” of being an Afrikaner at... -
Warriors of the rainbow nation? South African rugby after apartheid
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Isak Niehaus --- Department of Social Anthropology, United KingdomIn this article I seek to account for the special appeal of rugby to white, particularly Afrikaner, men in South Africa, by treating rugby as a social phenomenon. I suggest that at a metaphorical level formulaic elements of the sport... -
A review of polymeric biomaterials research for tissue engineering and drug delivery applications at the Centre for Biomedical and Biomaterials Research, Mauritius
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Archana Bhaw-Luximon --- Centre of Excellence for Biomedical and Biomaterials Research, Mauritius Roubeena Jeetah --- Centre of Excellence for Biomedical and Biomaterials Research, Mauritius Nowsheen Goonoo --- Centre of Excellence for Biomedical and Biomaterials Research, Mauritius Anisha Veeren --- Centre of Excellence for Biomedical and Biomaterials Research, Mauritius Yeshma Jugdawa --- Centre of Excellence for Biomedical and Biomaterials Research, Mauritius Dhanjay Jhurry --- Centre of Excellence for Biomedical and Biomaterials Research, MauritiusThe purpose of this review article is to showcase research in the area of polymeric nanobiomaterials and nanocarriers for drug delivery, especially on the economically fast-growing African continent where research in the field of advanced polymers and nanomedicine can play... -
Exploring a regional pharmaceutical innovation network as a possible solution to the market failure in the innovation of essential medicines for tropical diseases in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Thaddeus Manu --- Centre for Commercial Law Studies, UKFrom an economic reasoning perspective, pharmaceutical research and development operates as a pure market activity. This viewpoint suggests innovations are receptive to questions of commerce. It is on this basis the pharmaceutical industry has undervalued the innovation of medicines for... -
Modelling dominant height and site index in different edaphoclimatic zones of Nothofagus dombeyi secondary forest in the Andes of south-central Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos Esse --- Universidad Católica de Temuco, Escuela de Ciencias Forestales, Chile Pablo J Donoso --- Universidad Austral de Chile, Instituto de Bosques y Sociedad, Chile Víctor Gerding --- Universidad Austral de Chile, Instituto de Bosques y Sociedad, Chile Celso Navarro --- Universidad Católica de Temuco, Escuela de Ciencias Forestales, Chile Francisco Encina-Montoya --- Universidad Católica de Temuco, Escuela de Ciencias Ambientales, ChileNothofagus dombeyi grows in a wide variety of sites. The information about its productivity is still scarce, which makes it difficult for foresters and landowners to take decisions about the best practices to maintain and/or improve the goods and services... -
Phenomenological and neurophysiologic investigation into contemplating umoya (Spirit) and its psychological applications
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Steve Edwards --- Psychology Department, South Africa Dumisani Nzima --- Psychology Department, South Africa Sumeshni Govender --- Psychology Department, South Africa Mandla Hlongwane --- Psychology Department, South Africa Dennis Kent --- Psychology Department, South Africa Caroll Hermann --- Psychology Department, South Africa Vusi Mathe --- Psychology Department, South Africa David Edwards --- Psychology Department, South AfricaThis study explored subjective and objective perspectives on uMoya, Spirit consciousness and/or spirituality, from a heuristic phenomenological and neurophysiologic perspective. Contemplative reflective data on uMoya and its neurophysiologic correlates were gathered from a culturally diverse group of eight researcher-participants aged... -
Abundance of the Indo-Pacific bottlenose dolphin Tursiops aduncus off south-west Mauritius
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Webster --- Mauritius Marine Conservation Society, Mauritius VG Cockcroft --- Centre for Dolphin Studies, Department of Zoology, South Africa A Cadinouche --- SEABIOME, MauritiusThe abundance of Indo-Pacific bottlenose dolphins Tursiops aduncus off the south-west coast of Mauritius was estimated using capture-mark-recapture modelling. Over the past two decades this population has been subjected to ongoing anthropogenic disturbance in the form of extensive coastal development... -
Changes in the trophic structure, abundance and species diversity of exploited fish assemblages in the artisanal fisheries of the northern coast, Senegal, West Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Ndour --- Institut Sénégalais de Recherches Agricoles [ISRA]/Centre de Recherche Océanographique de Dakar-Thiaroye [CRODT], Sénégal F Le Loc'h --- Institut de Recherche pour le Développement [IRD], Laboratoire des sciences de l'Environnement Marin [UMR 6539 LEMAR] (Centre national de la recherche scientifique [CNRS], France J Kantoussan --- Université Gaston Berger [UGB], Sénégal M Thiaw --- Institut Sénégalais de Recherches Agricoles [ISRA]/Centre de Recherche Océanographique de Dakar-Thiaroye [CRODT], Sénégal HD Diadhiou --- Institut Sénégalais de Recherches Agricoles [ISRA]/Centre de Recherche Océanographique de Dakar-Thiaroye [CRODT], Sénégal JM Ecoutin --- Institut de Recherche pour le Développement [IRD], Sénégal L Tito de Morais --- Institut de Recherche pour le Développement [IRD], Laboratoire des sciences de l'Environnement Marin [UMR 6539 LEMAR] (Centre national de la recherche scientifique [CNRS], France OT Thiaw --- L'Institut Universitaire de Pêche et d'Aquaculture [IUPA], SénégalThis work investigates the effects of changes in both fishing pressure and the environment on the trophic dynamics, abundance and diversity of species in the artisanal commercial fisheries off the northern coast of Senegal. Using artisanal commercial fishing data (provided... -
Trophic investigations of Cape fur seals at the easternmost extreme of their distribution
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Connan --- Department of Zoology, South Africa GJG Hofmeyr --- Department of Zoology, South Africa MJ Smale --- Department of Zoology, South Africa PA Pistorius --- Department of Zoology, South AfricaThe diet of Cape fur seals Arctocephalus pusillus pusillus in the eastern portion of their distribution has received little attention previously, and was studied using traditional methods only. In 2013 we therefore assessed the diet of seals at the easternmost... -
Microalgal responses to physico-chemical variability in the small temporarily open/closed Seteni Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NK Carrasco --- School of Life Sciences, South Africa R Perissinotto --- School of Life Sciences, South AfricaThe Seteni Estuary is a small temporarily open/closed estuary (TOCE) in South Africa under the influence of agricultural practices. While the general significance of microalgae to estuarine production is widely recognised, the factors regulating microalgal biomass in these heterogeneous systems... -
Diurnal and water salinity-dependent metabolic activity of juvenile white steenbras Lithognathus lithognathus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Kandjou --- Department of Ichthyology and Fisheries Science, South Africa H Kaiser --- Department of Ichthyology and Fisheries Science, South AfricaThe euryhaline white steenbras Lithognathus lithognathus is an important estuarine-dependent fish species in the South African marine and estuarine environment. Its tolerance to water quality fluctuations, in particular its metabolic rate responses to salinity changes, has not been studied. In... -
Aspects of the breeding ecology of the Purple Swamphen Porphyrio porphyrio in the wetland complex of Guerbes-Sanhadja, north-east Algeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Bara Mouslim --- Laboratoire Ecologie des Systèmes terrestres et aquatiques, Algeria Merzoug Seyf Eddine --- Laboratoire Biologie, Eau et Environnement, Algeria Khelifa Rassim --- Laboratoire Biologie, Eau et Environnement, Algeria Bouslama Zihad --- Laboratoire Ecologie des Systèmes terrestres et aquatiques, Algeria Houhamdi Moussa --- Laboratoire Biologie, Eau et Environnement, AlgeriaThe Purple Swamphen Porphyrio porphyrio is a common rail that previously was little investigated in North Africa. From 2011 to 2013, its breeding ecology was studied at two natural wetlands in north-east Algeria, namely Garaet Hadj Tahar and Garaet Messaoussa... -
Helen Suzman: a psychobiographical — psychosocial developmental trajectory study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Paul Fouchè --- University of the Free State, South Africa Carla Nel --- University of the Free State, South Africa Roelf van Niekerk --- Nelson Mandela Metropolitan University, South AfricaThe primary aim of this study was to describe Helen Suzman's (1917–2009) psychosocial developmental trajectory within her socio-historical context through the application of the stage based description of psychosocial development by Erikson. Two methodological strategies were used. Alexander's psychobiographical model... -
Telangiectatic osteosarcoma, a rare complication of Paget's disease of bone
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: FH Van Zyl --- Division of Endocrinology, Department of Medicine, Faculty of Health Sciences, M Conradie --- Division of Endocrinology, Department of Medicine, Faculty of Health Sciences, K Barnard --- Division of Endocrinology, Department of Medicine, Faculty of Health Sciences, FS Hough --- Division of Endocrinology, Department of Medicine, Faculty of Health Sciences, BH Ascott-Evans --- Division of Endocrinology, Department of Medicine, Faculty of Health Sciences, -
Effect of production site, storage duration, and hot water and molybdenum dips on bioactive compounds with antioxidant properties in lemon flavedo during cold storage
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Nhlanhla Mathaba --- School of Agricultural, Earth and Environmental Sciences, South Africa John P Bower --- School of Agricultural, Earth and Environmental Sciences, South Africa Isa Bertling --- School of Agricultural, Earth and Environmental Sciences, South AfricaCertain bioactive compounds, such as vitamin E (α-tocopherol), vitamin C (ascorbic acid), β-carotene, polyphenols (e.g. flavonoids and flavonones, viz. hesperidin and naringin) have antioxidant properties and their presence in the citrus flavedo plays a significant role in mitigating oxidative stress,... -
Interactions between stream channel incision, soil water levels and soil morphology in a wetland in the Hogsback area, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mohammed Y Omar --- Department of Agronomy, South Africa Pieter AL Le Roux --- Department of Soil, Crop and Climate Sciences, South Africa Johan J van Tol --- Department of Agronomy, South AfricaWetland degradation in the form of channel incisioning can significantly alter the hydrological functioning of a wetland. In this study in a small headwater wetland in the Hogsback area, Eastern Cape province, the impact of channel incisioning on soil water... -
Influence of glyphosate, other herbicides and genetically modified herbicide-resistant crops on soil microbiota: a review
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Karen Wolmarans --- Department of Plant Sciences, South Africa Wijnand J Swart --- Department of Plant Sciences, South AfricaThe use of herbicides and genetically modified crops that are herbicide tolerant (HT) is said to adversely affect soil microbial biodiversity, thus negatively influencing the soil ecosystem. Concern has also been raised regarding the potential increase in crop disease incidence... -
The correlation between the health-related fitness of healthy participants measured at home as opposed to fitness measured by sport scientists in a laboratory
Item type: Journal Article • Journal: South African Family Practice • Authors: CC Grant --- Department of Sports Medicine, South Africa DC Janse van Rensburg --- Department of Sports Medicine, South Africa MS Pepper --- Department of Immunology, South Africa PJ du Toit --- Department of Physiology, South Africa PS Wood --- Department of Biokinetics, Sport and Leisure Sciences, South Africa J Ker --- Department of Sports Medicine, South Africa PE Krüger --- Institute for Sport Research, South Africa CW Grobbelaar --- Department of Physiology, South Africa K Nolte --- Department of Biokinetics, Sport and Leisure Sciences, South Africa F Fletcher --- Department of Statistics, South Africa TC Grant --- Department of Sports Medicine, South AfricaBackground: Fitness is defined in the health context as a state of good health or physical condition, primarily as a result of exercise and proper nutrition. Conventional methods of measuring fitness are expensive, time consuming and require specialised methods. There... -
Experiences with Jatropha cultivation in sub-Saharan Africa: Lessons for the next phase of development
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Raphael M. Jingura --- Directorate of Quality Assurance and Graduate Studies, Zimbabwe Reckson Kamusoko --- Directorate of Quality Assurance and Graduate Studies, ZimbabweJatropha curcas L. has emerged in recent times as a leading energy crop in sub-Saharan Africa with over 32 countries in the region involved in its production. The establishment of Jatropha has not been without challenges and has arguably been... -
Paediatric burns anaesthesia: the things that make a difference
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Jenny M. Thomas --- Department of Anaesthesia, South Africa Kotie Bester --- Department of Anaesthesia, South AfricaAnaesthesia and pain management for paediatric burns continues to challenge and frustrate healthcare professionals in this field of medicine. This review aims to provide some practical management strategies to enable the improved care of burned children. The pathophysiology of burns,... -
Anaesthesia for oesophageal atresia with or without tracheo-oesophageal atresia
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Palesa Motshabi --- Charlotte Mxeke Johannesburg Academic Hospital and Department of Anaesthesia, South AfricaOesophageal atresia, with or without tracheo-oesophageal fistula, is one of the most challenging conditions with which the anaesthesiologist has to deal during the perioperative period. The patients are usually in their first few days of life, and might be premature... -
An audit of the perioperative anaesthetic management of ventriculoperitoneal shunt insertion in the paediatric population at Inkosi Albert Luthuli Central Hospital
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: K Allopi --- Department of Anaesthetics, South Africa L Padayachee --- Department of Anaesthetics, South AfricaObjective: Our study included an assessment of current anaesthetic practice in paediatric ventriculoperitoneal shunt insertion (VPSI), a review of shunt revision and complication rates, an evaluation of the incidence of congenital syndromes, retroviral disease and tuberculosis meningitis, and differentiation with... -
The use of ultrasonography in the perioperative management of penetrating chest trauma with indwelling blade
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: S Kudsk-Iversen --- Stanger Hospital, South Africa R Matos-Puig --- Stanger Hospital, South AfricaWe report on the anaesthetic and postoperative analgesic management of a patient presenting with a single penetrating thoracic injury, with radiological confirmation of a foreign object still present in the thorax. The patient underwent an emergency right posterolateral thoracotomy. We... -
Unexpected sneezing after a peribulbar injection in a patient for elective cataract surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Teena Bansal --- University of Health Sciences, India Rajmala Jaiswal --- University of Health Sciences, India Sarla Hooda --- University of Health Sciences, IndiaSneezing or the sternutatory reflex, inborn in most animals, is a primitive neuromuscular physiological response to irritation. Sometimes, unusual sneezing occurs during and immediately after a peribulbar block, which is generally performed with a local anaesthetic in awake patients. We... -
Willingness to participate in future HIV prevention trials in Beira, Mozambique
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ivete Meque --- Universidade Católica de Moçambique/Catholic University of Mozambique (UCM), Centro de Investigação de Doenças Infecciosas/Research Center for Infectious Diseases (CIDI), Mozambique Karine Dubé --- FHI 360, USA Lotte Bierhuizen --- Amsterdam Institute of Global Health and Development (AIGHD), The Netherlands Arlinda Zango --- Universidade Católica de Moçambique/Catholic University of Mozambique (UCM), Centro de Investigação de Doenças Infecciosas/Research Center for Infectious Diseases (CIDI), Mozambique Nienke Veldhuijzen --- Amsterdam Institute of Global Health and Development (AIGHD), The Netherlands Fidelina Cumbe --- Universidade Católica de Moçambique/Catholic University of Mozambique (UCM), Centro de Investigação de Doenças Infecciosas/Research Center for Infectious Diseases (CIDI), Mozambique Paul J Feldblum --- FHI 360, USA Janneke van de Wijgert --- Amsterdam Institute of Global Health and Development (AIGHD), The NetherlandsIn preparation for trials of new HIV prevention methods, willingness to participate (WTP) was assessed in Beira, Mozambique. A totla of 1 019 women participating in an HIV incidence study, and 97 men participating in a separate WTP survey, were... -
Trauma aesthetics in war documentaries about the Lord's Resistance Army in Uganda
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Okaka Opio Dokotum --- Literature Department, UgandaMemory studies scholar Cathy Caruth postulates that “history is precisely the way we are implicated in one another's trauma” (24). Given the violent and traumatic history of post-independence Uganda, especially the bloody, insane and protracted Lord's Resistance Army (LRA) insurgency... -
Historification and Kenya's Plural Identities: Re-reading Ngugi's Historiography
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Jairus Omuteche --- Department of Language and Literature Education, KenyaThis article critiques Ngugi wa Thi ong'o's strategies of constructing nationalism and heroism in some of his creative works. This critical re-reading focuses on Ngugi's choice and projections of characters in relation to historical epoch and setting, evaluating how the... -
The Intersection of the Self and History in Kenyan Autobiographies
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Jennifer Muchiri --- Department of Literature, KenyaLife writing has increasingly become a popular genre which calls for sustained interrogation and analysis of the narratives produced. The autobiography is not only the story of the narrating subject but can be read as the history of the society... -
Sexuality, Power and Transgression: Homophobia in Abdulrazak Gurnah's Memory of Departure
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Kimani Kaigai --- Literature Department, KenyaThis paper offers a reading of Zanzibari-born, UK-based writer, Abdulrazak Gurnah’ debut novel, Memory of Departure in order to explore how the novel positions sexual activities that are seen as transgressive and how contestations over these bodily activities imply issues... -
Behavioural characteristics of offenders with mental health disorders in a South African prison population
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Johan Prinsloo --- Department of Criminology & Security Science, South Africa Anni Hesselink --- Department of Criminology & Security Science, South AfricaThis exploratory study profiled behavioural characteristics of a non-random sample of 91 offenders with mental illness in a South African correctional facility. The sample is directly related to diagnosed cases from the correctional psychiatrist's case load. The most prevalent mental... -
School and community participation of in-school teenagers affected by orphanhood in a rural South Africa setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Alfred Motalenayne Modise --- Faculty of Education, South AfricaThis study investigated schooling and community participation qualities of teenage learners affected by orphanhood in rural secondary South African setting. Participants were a purposive sample of 30 teenage learners, (female = 60% black = 98%, 12 to 19 years old)... -
Water quality dynamics in the Boro-Thamalakane-Boteti river system, northern Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Tubatsi --- Okavango Research Institute, Botswana MC Bonyongo --- Okavango Research Institute, Botswana M Gondwe --- Okavango Research Institute, BotswanaThe quality of water in aquatic systems is subject to temporal and spatial variations due to varying effects of natural and anthropogenic factors. This study assessed the dynamics of water quality in the Boro-Thamalakane-Boteti river system along an upstream–downstream gradient... -
Responses of primary producers to mouth closure in the temporarily open/closed Great Brak Estuary in the warm-temperate region of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Nunes --- Department of Botany, South Africa JB Adams --- Department of Botany, South AfricaLow river inflow conditions during 2009/2010 resulted in the mouth of the Great Brak Estuary remaining closed for almost two years. The low water level in Wolwedans Dam resulted in no annual environmental flow releases being made, causing mouth closure... -
Analysis of active rotenone concentration during treatment of the Rondegat River, Cape Floristic Region, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: E Slabbert --- Department of Microbiology, South Africa MS Jordaan --- CapeNature Scientific Services, South Africa OLF Weyl --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaMost endemic freshwater fish species of the Cape Floristic Region are listed as threatened, due mainly to the impacts of invasive alien fish species. The piscicide rotenone has been identified as a potential tool to aid the conservation of indigenous... -
Diagnosing the sexual pattern of Diplodus cervinus hottentotus (Pisces: Sparidae) from southern Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Winkler --- Department of Ichthyology and Fisheries Science, South Africa CV Santos --- Faculdade Ciências da Universidade Agostinho Neto (FCUAN), Angola WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe sexual pattern of Diplodus cervinus hottentotus was investigated in southern Angola. Females were significantly smaller and found in greater numbers, with an adult sex ratio of 1.0:0.7, F:M. Histological observations of preserved gonads indicated that the species is a... -
Spatio-temporal variation in density of microphytoplankton genera in two tropical coral reefs of Mauritius
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SB Sadally --- Department of Biosciences, Faculty of Science, Mauritius N Taleb-Hossenkhan --- Department of Biosciences, Faculty of Science, Mauritius R Bhagooli --- Department of Biosciences, Faculty of Science, MauritiusSpatial and temporal (seasonal and interannual) variation in microphytoplankton was investigated at two tropical coral reef sites off Mauritius (Belle Mare [BM] and Flic-en-Flac [FEF]), from 2010 to 2012. Each site was divided into three zones: coast, lagoon and reef... -
Home range and diving behaviour of Heaviside's dolphins monitored by satellite off the west coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RW Davis --- Department of Marine Biology, USA JHM David --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa MA Meÿer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa K Sekiguchi --- International Christian University, Japan PB Best --- Mammal Research Institute, South Africa M Dassis --- Instituto de Investigaciones Marinas y Costeras, Facultad de Ciencias Exactas y Naturales, Argentina DH Rodríguez --- Instituto de Investigaciones Marinas y Costeras, Facultad de Ciencias Exactas y Naturales, ArgentinaThree Heaviside's dolphins Cephalorhynchus heavisidii were fitted with satellite depth recorders off the west coast of South Africa during February–April 1997 and monitored for 51, 73 and 130 days, respectively. In total, 345 locations were received from the three animals,... -
Estimation of size at first maturity in two South African coral species
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PH Montoya-Maya --- Oceanographic Research Institute, Marine Parade, South Africa AHH Macdonald --- School of Life Sciences, South Africa MH Schleyer --- Oceanographic Research Institute, Marine Parade, South AfricaThe corals Acropora austera and Platygyra daedalea have been the subject of extensive reproductive and population genetic studies in the iSimangaliso Wetland Park (iSimangaliso), on the KwaZulu-Natal coast, eastern South Africa. Despite this, estimates of size at first maturity in... -
Culture environment and hatchery of origin influence growth, condition and feeding organ morphology in the Pacific oyster Crassostrea gigas in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Nel --- Department of Botany and Zoology, South Africa G Pitcher --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, South Africa NB Richoux --- Department of Zoology and Entomology, South Africa S Jackson --- Department of Botany and Zoology, South AfricaSouth Africa lacks a commercial oyster hatchery. To inform the sourcing of seed for future hatchery establishments, we compared half-sib Pacific oyster Crassostrea gigas cohorts from hatcheries in Namibia and Chile. We measured oyster growth, mortality, condition and feeding organ... -
Identification of the marine diatom Pseudo-nitzschia multiseries (Bacillariophyceae) as a source of the toxin domoic acid in Algoa Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GC Pitcher --- Branch: Fisheries Management, Department of Agriculture, South Africa AD Cembella --- Alfred-Wegener Institut-Helmholtz Zentrum für Polar- und Meeresforschung, Germany B Krock --- Alfred-Wegener Institut-Helmholtz Zentrum für Polar- und Meeresforschung, Germany BM Macey --- Branch: Fisheries Management, Department of Agriculture, South Africa L Mansfield --- Branch: Fisheries Management, Department of Agriculture, South Africa TA Probyn --- Branch: Fisheries Management, Department of Agriculture, South AfricaA unialgal culture of a Pseudo-nitzschia species dominant in the plankton of Algoa Bay in the spring of 2012 was established by isolation of clonal chains of cells. Identification of the species as Pseudo-nitzschia multiseries was based on frustule morphometrics... -
Research and conservation of the larger parrots of Africa and Madagascar: a review of knowledge gaps and opportunities
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Rowan O Martin --- Percy FitzPatrick Institute of African Ornithology, South Africa Michael R Perrin --- Research Centre for African Parrot Conservation, South Africa Rutledge S Boyes --- Percy FitzPatrick Institute of African Ornithology, South Africa Yilma D Abebe --- Ethiopian Wildlife and Natural History Society, Ethiopia Nathaniel D Annorbah --- Division of Biology and Conservation Ecology, UK Augustus Asamoah --- Environmental Sustainability Project, Accra Dieudonné Bizimana --- Association Burundaise pour la protection des Oiseaux, Burundi Kadiri S Bobo --- Department of Forestry, Faculty of Agronomy and Agricultural Sciences, Cameroon Nancy Bunbury --- Seychelles Islands Foundation, Seychelles Joost Brouwer --- Niger Bird Database, The Netherlands Moussa S Diop --- AfriWet Consultants, Senegal Mihret Ewnetu --- Ethiopian Wildlife Conservation Authority, Ethiopia Roger C Fotso --- Wildlife Conservation Society, Cameroon Jerry Garteh --- Society for the Conservation of Nature of Liberia, Liberia Philip Hall --- AP Leventis Ornithological Research Institute, Nigeria Lars H Holbech --- Department of Animal Biology and Conservation Science, Ghana Ireene R Madindou --- Ornithology Section, Kenya Fiona Maisels --- Global Conservation Program, USA Jérôme Mokoko --- Wildlife Conservation Society, Republic of Congo Ronald Mulwa --- Ornithology Section, Kenya Anna Reuleaux --- Seychelles Islands Foundation, Seychelles Craig Symes --- School of Animal, Plant and Environmental Sciences, South Africa Simon Tamungang --- Wildlife Ecology and Management Group, Cameroon Stuart Taylor --- School of Science, Faculty of Science and Engineering, New Zealand Simon Valle --- Division of Biology and Conservation Ecology, UK Matthias Waltert --- Conservation Biology/Workgroup on Endangered Species, Germany Mengistu Wondafrash --- Ethiopian Wildlife and Natural History Society, EthiopiaParrot populations in Africa and Madagascar are declining and the need for conservation actions to address threats is increasingly recognised. Effective conservation requires a robust knowledge base on which decisions over appropriate actions can be made, yet at present there... -
The disjunctive domination number of a graph
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Wayne Goddard --- Department of Mathematical Sciences, USA Michael A. Henning --- Department of Mathematics, South Africa Charles A. McPillan --- Department of Mathematical Sciences, USAFor a positive integer b, we define a set S of vertices in a graph G as a b-disjunctive dominating set if every vertex not in S is adjacent to a vertex of S or has at least b vertices... -
Factors which predict interpersonal violence in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Lincoln J Fry --- Sociology and Health Research Units, GreeceBackground: This paper responds to the call for an extensive research agenda to be developed and designed to identify, plan and then implement prevention programmes with respect to violent crime in South Africa. This study began that process by identifying... -
A review of occupational exposure to blood and blood products in medical students in a South African university
Item type: Journal Article • Journal: South African Family Practice • Authors: Andrew Ross --- Department of Family Medicine, Nelson R Mandela School of Medicine, South Africa Sean Cheevers --- Occupational and Student Health Services, South Africa Laura Campbell --- Teaching and Learning in Clinical Medicine, South AfricaBackground: There is a significant risk of a medical student acquiring a blood-borne pathogen following occupational exposure to blood and other bodily fluids from infected patients in the healthcare setting. Internationally and nationally, interventions have been implemented in medical schools... -
Paediatric ophthalmology at primary healthcare level
Item type: Journal Article • Journal: South African Family Practice • Authors: Mpopi Lenake --- Division of Ophthalmology, Groote Schuur Hospital, South Africa Nagib du Toit --- Division of Ophthalmology, Groote Schuur Hospital, South AfricaPaediatric patients make up a significant portion of the patient load at primary care level. Children can present at the primary care physician with a wide range of eye problems, some of which are serious enough to impair the quality... -
Genetic diversity of Amaranthus species in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Abe S Gerrano --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Willem S Jansen van Rensburg --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Patrick O Adebola --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South AfricaAmaranthus species plays an important role in sustaining food security and alleviation of malnutrition in South Africa. A number of Amaranthus genotypes have been collected and conserved in the gene bank of the ARC–Roodeplaat Vegetable and Ornamental Plant Institute, South... -
Morphological identification of the ryegrass hybrid Lolium multiflorum × Lolium perenne and isolation of the pathogen Fusarium pseudograminearum in the Western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael I Ferreira --- Plant Science, Western Cape Department of Agriculture, South Africa Carl F Reinhardt --- Department of Plant Production and Soil Science, South Africa Sandra C Lamprecht --- Agricultural Research Council–Plant Protection Research Institute, South Africa Marna Sinclair --- Veterinary Services, Western Cape Department of Agriculture, South Africa Liezl MacKenzie --- Directorate Research Support Services, Western Cape Department of Agriculture, South Africa Gert van Coller --- Plant Science, Western Cape Department of Agriculture, South AfricaWeed resistance to herbicides present one of the greatest current economic challenges to agriculture. Herbicide resistant ryegrass (Lolium spp.) is a serious problem in Western Cape grain-producing areas. Morphological and pathogenic analyses were performed on ryegrass samples. Morphologically, 50% of... -
An innovative drought early warning system for sub-Saharan Africa: integrating modern and indigenous approaches
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Muthoni Masinde --- Department of Information Technology, South AfricaDroughts remain the number one disaster in Africa; drought is responsible for over 88% of all the types of disasters that people are affected by. An effective drought early warning system can support appropriate mitigation and preparedness strategies and hence... -
Nitrogen fixation of Acacia mangium Willd. from two seed sources grown at different levels of phosphorus in an Ultisol, South Sumatra, Indonesia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: M Gunawan Wibisono --- School of Plant Biology, Australia Erik Veneklaas --- School of Plant Biology, Australia Daniel S Mendham --- CSIRO Ecosystem Sciences, Australia Eko B Hardiyanto --- Faculty of Forestry, IndonesiaPhosphorus (P) is required to facilitate the fixation of atmospheric nitrogen (N) by leguminous species such as Acacia mangium. We studied the N fixation of A. mangium trees grown from two seed sources. These consisted of bulk seedlots collected from... -
Towards a classification of Tanzanian rivers: a bioassessment and ecological management tool. A case study of the Pangani, Rufiji and Wami–Ruvu river basins
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LT Kaaya --- Department of Aquatic Sciences and Fisheries, TanzaniaRiver classification is important for reporting ecological status and for the general ecological management of river systems by partitioning natural variability. A priori river classification by abiotic variables and validation of classifications obtained using aquatic macroinvertebrates from reference sites for... -
Biochemical, haematological and morphological variations in juvenile Clarias gariepinus exposed to Carbendazim® fungicide
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CD Nwani --- Department of Zoology and Environmental Biology, Nigeria MC Omah --- Department of Applied Biology and Biotechnology, Nigeria N Ivoke --- Department of Zoology and Environmental Biology, Nigeria HO Nwamba --- Department of Applied Biology and Biotechnology, Nigeria C Ani --- Department of Applied Biology, Nigeria SU Ogbonna --- Department of Applied Biology, NigeriaThe biochemical, haematological and morphological variations in juvenile Clarias gariepinus exposed to Carbendazim® (methyl-2-benzimidazole carbamate; CBZ), a fungicide effective for the control of fungal pathogens in plants, were determined. The 96 h LC50 value of CBZ determined by probit analysis... -
Water quality monitoring in sub-Saharan African lakes: a review of remote sensing applications
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Dube --- School of Agricultural, Earth and Environmental Sciences, South Africa O Mutanga --- School of Agricultural, Earth and Environmental Sciences, South Africa K Seutloali --- School of Agricultural, Earth and Environmental Sciences, South Africa S Adelabu --- Department of Geography, South Africa C Shoko --- School of Bioresources Engineering and Environmental Hydrology, South AfricaWater quality deterioration in sub-Saharan Africa has attained a scale that requires scientific intervention. It is therefore important to devise appropriate and reliable techniques to investigate the water quality of lakes and reservoirs for the development of water resource management... -
Branchiuran parasites (Crustacea: Branchiura) from fishes in the Okavango (Botswana) and Zambezi (Namibia) systems
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LL Van As --- Department of Zoology and Entomology, South Africa JG Van As --- Department of Zoology and Entomology, South AfricaFish parasitological surveys, conducted during different times of the year in the Okavango and Upper Zambezi River systems from 1997 to 2013, revealed the presence of five branchiuran species. Dolops ranarum from the Okavango system was found on the skin... -
Biochemical and haematological responses in African catfish Clarias gariepinus following chronic exposure to NPK (15:15:15) fertiliser
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MNO Ajima --- Department of Fisheries and Aquaculture Technology, Nigeria OA Ogo --- Department of Biochemistry, Nigeria LE Akpa --- Department of Zoology, Nigeria I Ajaero --- Department of Fisheries and Aquaculture Technology, NigeriaThe indiscriminate use of inorganic fertilisers to boost plant productivity has resulted in negative consequences in aquatic ecosystems. The effects of chronic exposure to NPK (15:15:15) fertiliser at 0.40, 0.80 and 1.60 g l−1 on the haematological and biochemical responses... -
The timing of moult in males and females of the monomorphic Pale-winged Starling Onychognathus nabouroup
Item type: Journal Article • Journal: African Zoology • Authors: Adrian JFK Craig --- Department of Zoology and Entomology, Rhodes University, South Africa Martine Hausberger --- UMR CNRS 6552 Ethologie animale et humaine, Université de Rennes-1, France Bo Bonnevie --- Information Technology Division, Rhodes University, South Africa Laurence Henry --- UMR CNRS 6552 Ethologie animale et humaine, Université de Rennes-1, FrancePale-winged Starlings Onychognathus nabouroup inhabit the arid western interior of southern Africa and moult– breeding overlap may occur. We collected field data in two successive years on the moult of individual birds, whose sex was confirmed by genetic techniques. Small... -
Host use does not clarify the evolutionary history of African ticks (Acari: Ixodoidea)
Item type: Journal Article • Journal: African Zoology • Authors: G.S. Cumming --- Department of Zoology, U.K.Where host-parasite associations are rigid and unique, the host preference(s) of parasites and the evolutionary relationships between their hosts may offer insights into the parasites’ evolu–tionary history. Where such associations are less rigid, however, the assumption that current host preferences... -
A morphological description of the sagittal otoliths of two mormyrids, Marcusenius macrolepidotus and Petrocephalus catostoma (Family: Mormyridae)
Item type: Journal Article • Journal: African Zoology • Authors: N.N. Nicolaai --- Department of Zoology and Biology, South Africa A. Jooste --- Department of Zoology and Biology, South AfricaThe morphology of the sagittal otoliths of two South African mormyrid fish, Marcusenius macrolepidotus and Petrocephalus catostoma, were studied to determine possible morphological significance. The sagittae of M. macrolepidotus and P. catostoma are kidney-shaped and oblong, respectively. The ventral margin... -
Relationships of the Pachydactylus rugosus group of geckos (Reptilia: Squamata: Gekkonidae)
Item type: Journal Article • Journal: African Zoology • Authors: Trip Lamb --- Department of Biology, U.S.A. Aaron M. Bauer --- Department of Biology, U.S.AWe examined phylogenetic relationships of the Pachydactylus rugosus complex using DNA sequence data from segments of the mitochondrial genes cytochrome b and 16S ribosomal RNA. These molecular data support the contention that members of the rugosus complex, as defined by... -
Echidnophaga suricatta (Siphonaptera: Pulicidae), a new species of flea from the Northern Cape Province, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Michael W. Hastriter --- Monte L. Bean Life Science Museum, Brigham Young University, U.S.A.Echidnophaga suricatta (Pulicidae), a new species of flea collected from the meerkat (Suricata suricatta Schreber, 1776) near Garies (30°22’S, 17°31’E) and Brandvlei (30°27’S, 20°29’E), Northern Cape Province, South Africa, is described. Based on chaetotaxy of the tarsal segments, this new... -
A new and unusual species of Parachiton (Mollusca: Polyplacophora) from South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Boris I. Sirenko --- Zoological Institute of the Russian Academy of Sciences, Universitetskaya nab, RussiaA new species of the genus Parachiton, P. hodgsoni n.sp., which inhabits shallow water off the South African coast, is described. The radula is unusual for the genus Parachiton. It consists of about 160 transverse rows of very small mature... -
Studies on African zygaenoid moths (Lepidoptera: Zygaenoidea): descriptions of final instar larvae of Psycharium pellucens, P. montanum and Psycharium sp. A, with notes on the larva of P. barnardi and Somabrachys (Somabrachyidae)
Item type: Journal Article • Journal: African Zoology • Authors: H. Geertsema --- Department of Entomology and Nematology, South AfricaGeneralized descriptions of the larvae of Somabrachyidae, with brief notes on their biology and habits, are presented. Illustrations in colour as well as a key for the identification of final instar larvae of Psycharium pellucens, P. montanum and Psycharium sp... -
A new genus and species of Ceratocanthidae from Tanzania (Coleoptera: Scarabaeoidea)
Item type: Journal Article • Journal: African Zoology • Authors: Alberto Ballerio --- Viale Venezia 45, I-25123 Brescia, ItalyCryptophilharmostes mahunkai n.gen., n.sp., a remarkable Ceratocanthidae (Coleoptera: Scarabaeoidea) from the Usambara Mountains (Tanzania), is described. The morphology of the clypeus and mesoepisternum is discussed, also with reference to other Ceratocanthidae. The affinities of the genus are discussed, and within... -
Aggressive behaviour of an adult male Cape fur seal (Arctocephalus pusillus pusillus) towards a great white shark (Carcharodon carcharias)
Item type: Journal Article • Journal: African Zoology • Authors: C.L. Stewardson --- Division of Botany and Zoology, Australian National University, Australia M. Brett --- Robberg Nature Reserve, South AfricaThis is a report of a marine predator (the white shark) being threatened by a member of the species on which it preys (a male Cape fur seal). Although these events may be rarely observed or occur infrequently, they may... -
Geographic variation in the morphology, echolocation and diet of the little free-tailed bat, Chaerephon pumilus (Molossidae)
Item type: Journal Article • Journal: African Zoology • Authors: F. Aspetsberger --- University of Bremen, FB 5 Geosciences, Germany Djuri Brandsen --- Department of Animal Ecology, Netherlands D. S. Jacobs --- Department of Zoology, South AfricaThe insectivorous bat Chaerephon pumilus has a wide distribution in Africa and displays considerable variation in the colour of its wings and venter.We investigated whether variation is also evident in its morphology, echolocation and diet by comparing a population of... -
A new species of land planarian (Platyhelminthes: Tricladida: Terricola: Rhynchodemidae) from South Africa, with a list of African terrestrial planarian species
Item type: Journal Article • Journal: African Zoology • Authors: H. D. Jones --- School of Biological Sciences, 3.239 Stopford Building, University of Manchester, U.K.Othelosoma joburgi is described from Roodepoort, Gauteng province, South Africa. Preserved worms are up to 16mmlong and 3mmwide, cylindrical, plump, and ‘sick green’ in colour with no obvious stripes or markings. There is a dorsal anterior retractor muscle which causes... -
Field identification of two morphologically similar bats, Miniopterus schreibersii natalensis and Miniopterus fraterculus (Chiroptera: Vespertilionidae)
Item type: Journal Article • Journal: African Zoology • Authors: Samantha Stoffberg --- Department of Zoology, South Africa David S. Jacobs --- Department of Zoology, South Africa Cassandra M. Miller-Butterworth --- Department of Zoology, South AfricaMiniopterus schreibersii natalensis and Miniopterus fraterculus are two morphologically similar, but genetically distinct, species of insectivorous bat that, more often than not, share roosts. Identifying these two species in the field is difficult because of an overlap in the ranges... -
Abundance of the endangered Cape parrot, Poicephalus robustus, in South Africa: implications for its survival
Item type: Journal Article • Journal: African Zoology • Authors: Colleen T. Downs --- School of Botany and Zoology, University of KwaZulu-Natal, South AfricaFactors affecting the decline of the endangered Cape parrot, which is endemic to South Africa, are presented. Its abundance and status were investigated during annual intensive national surveys. The merits of such a census are reported. Presence of birds was... -
Molecular diversity and phylogenetic relationships of the gastropod genus Melanoides in Lake Malawi
Item type: Journal Article • Journal: African Zoology • Authors: Louise Von Gersdorff Sørensen --- Mandahl-Barth Research Center for Biodiversity and Health, DBL — Institute for Health Research and Development, Denmark Aslak Jørgensen --- Mandahl-Barth Research Center for Biodiversity and Health, DBL — Institute for Health Research and Development, Denmark Thomas K. Kristensen --- Mandahl-Barth Research Center for Biodiversity and Health, DBL — Institute for Health Research and Development, DenmarkThe freshwater snails belonging to the genus Melanoides Olivier, 1804 are widespread across tropical regions of the world and endemic species have evolved in the African Lakes Malawi, Mweru and Tanganyika. The endemic Melanoides species of Lake Malawi have been... -
Genetic variability of South African fiscal shrikes (Lanius collaris) across an altitudinal gradient
Item type: Journal Article • Journal: African Zoology • Authors: S. Soobramoney --- School of Biological & Conservation Sciences, University of KwaZulu-Natal, South Africa G.K. Campbell --- School of Life and Environmental Sciences, University of KwaZulu-Natal, South Africa C.T. Downs --- School of Biological & Conservation Sciences, University of KwaZulu-Natal, South Africa N.J. Adams --- School of Biological & Conservation Sciences, University of KwaZulu-Natal, South AfricaAn electrophoretic allozyme study of the fiscal shrike Lanius collaris, a widely distributed sub-Saharan passerine, was undertaken to investigate altitudinal variation in genetic structure within this species. It is a sedentary bird with limited dispersal so that subpopulations may be... -
Pycnoclavella (Tunicata: Ascidiacea) species from the West Indian Ocean
Item type: Journal Article • Journal: African Zoology • Authors: Patricia Kott --- Queensland Museum, AustraliaThree new Pycnoclavella species, recorded from a number of locations in Algoa and Plettenberg bays, suggest an unusual diversity for this genus in South African waters and indicate the extent to which the fauna of this part of the world... -
The Mollusca inhabiting rice fields in northern Cameroon and their role as intermediate hosts for schistosomes
Item type: Journal Article • Journal: African Zoology • Authors: A. Ndassa --- General Biology Laboratory, Faculty of Science, Cameroon R. Mimpfoundi --- General Biology Laboratory, Faculty of Science, CameroonA systematic account is given of the freshwater gastropod and bivalve fauna of Ouro-Doukoudje, northern Cameroon, based on a survey conducted from July 2000 to June 2001 at 12 sites in rice fields spanning 800 ha. In total, 14 species... -
Cephalopod diet of the Cape fur seal, Arctocephalus pusillus pusillus, along the Namibian coast: variation due to location
Item type: Journal Article • Journal: African Zoology • Authors: P.J.N. de Bruyn --- Mammal Research Institute, Department of Zoology and Entomology, South Africa M.N. Bester --- Mammal Research Institute, Department of Zoology and Entomology, South Africa S.P. Kirkman --- Mammal Research Institute, Department of Zoology and Entomology, South Africa S. Mecenero --- Avian Demography Unit, Department of Statistical Sciences, South Africa J.P. Roux --- Ministry of Fisheries and Marine Resources, Directorate of Resource Management, Lüderitz Marine Research, Namibia N.T.W. Klages --- Institute for Environmental and Coastal Management, Nelson Mandela Metropolitan University, South AfricaScats of the Cape fur seal, Arctocephalus pusillus pusillus, were sampled at four mainland colonies, Cape Cross, Atlas Bay,Wolf Bay and Van Reenen Bay, along the Namibian coast over a period of eight years (1994–2001) to assess the diversity and... -
Phylogenetic relationships in the genus Aethomys (Rodentia: Muridae)
Item type: Journal Article • Journal: African Zoology • Authors: C.T. Chimimba --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaPhylogenetic relationships in the genus Aethomys were examined based on qualitative cranial data for all currently recognized species. A cladistic analysis suggested the presence of three clades: 1) A. bocagei, A. thomasi, A. silindensis, A. kaiseri, and A. nyikae;2) A... -
Ultrastructure of epididymal spermatozoa in three social African mole-rats of the genus Cryptomys (Rodentia: Bathyergidae): conservatism in sperm morphology
Item type: Journal Article • Journal: African Zoology • Authors: K.A. Maswanganye --- Mammal Research Institute, Department of Zoology and Entomology, South Africa G.P. Malherbe --- Mammal Research Institute, Department of Zoology and Entomology, South Africa N.C. Bennett --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaThe morphology, size and three-dimensional structure of spermatozoa from three representatives of the genus Cryptomys were investigated. To date, there has been no study to either elucidate the morphological features or relative dimensions of spermatozoa in the genus Cryptomys specifically,... -
An ultrastructural investigation of Argulus personatus Cunnington, 1913 (Crustacea: Branchiura) from Lake Tanganyika, northern Zambia
Item type: Journal Article • Journal: African Zoology • Authors: Quinton Tam --- Department of Zoology, South Africa Annemarié Avenant-Oldewage --- Department of Zoology, South Africa Ernest H. Williams --- Department of Marine Sciences,Sixteen male and one female specimen of Argulus personatus Cunnington, 1913, were collected from Bathybates ferox Boulenger, 1898, from Lake Tanganyika in northern Zambia. Light and scanning electron microscopy (SEM) examinations documented a thickening of cuticle located on the dorsal... -
Life history characteristics of Alticus monochrus, a supratidal blenny of the southern Indian Ocean
Item type: Journal Article • Journal: African Zoology • Authors: M. Bhikajee --- Faculty of Science, University of Mauritius, Mauritius J. M. Green --- Department of Biology, Canada R. Dunbrack --- Department of Biology, CanadaThe blenny Alticus monochrus Bleeker inhabits exposed rocky shores of Mauritius and other islands of the southwestern Indian Ocean. A. monochrus is an amphibious species and remains almost exclusively above the water line, migrating vertically with the tide while feeding... -
Home range and seasonal movement of elephants in the Kunene Region, northwestern Namibia
Item type: Journal Article • Journal: African Zoology • Authors: Keith E.A. Leggett --- Namibian Elephant and Giraffe Trust, NamibiaThis paper examines the home ranges and seasonal movements of eight GPS-collared elephants (two females and six males) in the northwestern Kunene region of Namibia. Minimum convex polygon (MCP) and the fixed kernel density estimation (FKDE) methods were used to... -
African elephant home range and habitat selection in Pongola Game Reserve, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Graeme Shannon --- Amarula Elephant Research Programme, School of Biological and Conservation Sciences, University of KwaZulu-Natal, South Africa Bruce Page --- Amarula Elephant Research Programme, School of Biological and Conservation Sciences, University of KwaZulu-Natal, South Africa Rob Slotow --- Amarula Elephant Research Programme, School of Biological and Conservation Sciences, University of KwaZulu-Natal, South Africa Kevin Duffy --- Durban Institute of Technology, South AfricaThe ranging behaviour and habitat occupancy by three elephant groups (cow herd, bulls, and an orphan group) were studied over a two-year period in a small, fenced reserve. No summer dispersal was observed. Distinct seasonal home ranges were exhibited for... -
Aspects of reproduction in the seasonally breeding African yellow bat, Scotophilus dinganii (A. Smith, 1833)
Item type: Journal Article • Journal: African Zoology • Authors: M. van der Merwe --- Mammal Research Institute, Department of Zoology and Entomology, South Africa N. J. van der Merwe --- Faculty of Veterinary Science, University of Pretoria, South Africa B. L. Penzhorn --- Faculty of Veterinary Science, University of Pretoria, South AfricaMonthly collections of the African yellow bat, Scotophilus dinganii, were made in the Kruger National Park. Examination of serially sectioned reproductive tracts of females showed that the African yellow bat is a monoestrous species and that insemination, ovulation and fertilization... -
Spring diet and trophic partitioning in an alpine lizard community from Morocco
Item type: Journal Article • Journal: African Zoology • Authors: Miguel A. Carretero --- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO/UP), Campus Agrário de Vairão, Portugal Anna Perera --- Departamento de Biologia Animal, Spain D. James Harris --- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO/UP), Campus Agrário de Vairão, Portugal Vasco Batista --- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO/UP), Campus Agrário de Vairão, Portugal Catarina Pinho --- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO/UP), Campus Agrário de Vairão, PortugalOukaïmeden Plateau is a herpetologically rich locality in the High Atlas (Morocco) where four lizard species coexist in strict sympatry: three lacertids (Lacerta perspicillata chabanaudi, L. andreanszkyi and Podarcis vaucheri – formerly P. hispanica vaucheri) and one gekkonid (Quedenfeldtia trachyblepharus)... -
Biogeographical patterns in the fauna associated with southern African mussel beds
Item type: Journal Article • Journal: African Zoology • Authors: Wendy Hammond --- Centre for Invasion Biology and Marine Biology Research Institute, University of Cape Town, South Africa Charles Griffiths --- Centre for Invasion Biology and Marine Biology Research Institute, University of Cape Town, South AfricaMacrofauna communities colonizing intertidal mussel beds were sampled at seven sites between Swakopmund (Namibia) and Salt Rock (KwaZulu-Natal). Mean mussel cover, length, biomass and bed depth were all low in the southeast (former Transkei). Faunal abundance and biomass were minimal... -
First record of a vagrant Commerson’s dolphin, Cephalorhynchus commersonii, at the southern African continental shelf
Item type: Journal Article • Journal: African Zoology • Authors: P. J. N. de Bruyn --- Mammal Research Institute, Department of Zoology and Entomology, South Africa G. J. G. Hofmeyr --- Mammal Research Institute, Department of Zoology and Entomology, South Africa M. S. de Villiers --- Avian Demography Unit, Department of Statistical Sciences, South AfricaCommerson’s Dolphins Cephalorhynchus commersonii are distributed in two disjunct populations, one around southern South America and the other around the sub-Antarctic Kerguelen Islands. These populations have been shown to be morphologically and genetically distinct and movement between the two populations... -
Vagrant Subantarctic fur seals at Bouvetøya
Item type: Journal Article • Journal: African Zoology • Authors: G. J. G. Hofmeyr --- Mammal Research Institute, Department of Zoology and Entomology, South Africa M. N. Bester --- Mammal Research Institute, Department of Zoology and Entomology, South Africa S. P. Kirkman --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaThree vagrant Subantarctic fur seals, Arctocephalustropicalis, were seen amongst a colony of Antarctic fur seals, A. gazella, at the isolated subantarctic island, Bouvetøya. Possible sources of the vagrants are populations at either Gough Island or the Prince Edward Islands Archipelago. -
Advertisement call and tadpole morphology of the clutch-guarding frog Mantidactylus argenteus from eastern Madagascar
Item type: Journal Article • Journal: African Zoology • Authors: Silvia Vejarano --- Institute for Biodiversity and Ecosystem Dynamics, Zoological Museum, University of Amsterdam, the Netherlands Meike Thomas --- Department of Genetics, Evolutionary Genetics, Germany Frank Glaw --- Zoologische Staatssammlung, Germany Miguel Vences --- Institute for Biodiversity and Ecosystem Dynamics, Zoological Museum, University of Amsterdam, the NetherlandsWe provide the first descriptions of the tadpole and advertisement call of Mantidactylus argenteus. Calls consist of 6–15 short and rather melodious notes, with a dominant frequency at 4100–4400 Hz and are emitted from arboreal positions during the day. The... -
Tick infestations in the Namaqualand speckled padloper, Homopus signatus signatus (Gmelin, 1789)
Item type: Journal Article • Journal: African Zoology • Authors: Victor J. T. Loehr --- Department of Biodiversity and Conservation Biology, South Africa Brian T. Henen --- Department of Biodiversity and Conservation Biology, South Africa Margaretha D. Hofmeyr --- Department of Biodiversity and Conservation Biology, South AfricaMany terrestrial chelonians are parasitized by ticks, but we have a poor understanding of what determines tick infestations on chelonian hosts. We counted ticks on Homopus signatus signatus during each spring in the years 2001–2004, and evaluated tick frequencies in... -
Morphological studies on Bulinus sp. (Gastropoda: Planorbidae) from Nchout Monoun, Cameroon
Item type: Journal Article • Journal: African Zoology • Authors: R. Mimpfoundi --- General Biology Laboratory, Faculty of Science, Cameroon A. Ndassa --- General Biology Laboratory, Faculty of Science, CameroonSince 1990, diploid Bulinus sp. populations have been reported from many sites in the volcanic western Bamileke and Bamoun plateau in Cameroon; starch gel electrophoresis of enzymes and chromosome analyses have revealed a single band in hydroxybutyrate dehydrogenase (HBDH), isocitrate... -
First confirmed records of Clymene dolphin, Stenella clymene (Gray, 1850), from Angola and Congo, South-East Atlantic Ocean
Item type: Journal Article • Journal: African Zoology • Authors: Caroline R. Weir --- Ketos Ecology, U.K.Clymene dolphins, Stenella clymene, are endemic to the tropical and subtropical Atlantic Ocean, where their occurrence is documented from fewer than 200 records. The species is particularly poorly known in the eastern Atlantic off the coast of Africa where only... -
Goose barnacle (Lepas australis) infestation of the Subantarctic fur seal (Arctocephalus tropicalis)
Item type: Journal Article • Journal: African Zoology • Authors: T. H. Setsaas --- Mammal Research Institute, Department of Zoology and Entomology, South Africa M. N. Bester --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaGoose barnacle infestations (Lepas australis) were found on the pelage of two female Subantarctic fur seals (Arctocephalus tropicalis) at Gough Island in the South Atlantic. The infested females were both relatively old at 11 and 15 years of age. We... -
Does the endangered Knysna seahorse, Hippocampus capensis, have a preference for aquatic vegetation type, cover or height?
Item type: Journal Article • Journal: African Zoology • Authors: Peter R. Teske --- Molecular Ecology and Systematics Group, Botany Department, South Africa Jacqueline F. Lockyear --- Department of Ichthyology and Fisheries Science, South Africa Thomas Hecht --- Department of Ichthyology and Fisheries Science, South Africa Horst Kaiser --- Department of Ichthyology and Fisheries Science, South AfricaThe Knysna seahorse, Hippocampus capensis, is an endangered teleost confined to three South African estuaries. Its abundance within these systems is low and distributions are patchy. Consequently, monitoring population sizes is labour-intensive. The aim of this study was to establish... -
Ecology of Wahlberg’s velvet gecko, Homopholis wahlbergii, in southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Martin J. Whiting --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa Leeann T. Reaney --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa J. Scott Keogh --- School of Botany and Zoology, The Australian National University, AustraliaWe examined 170 museum specimens of the southern African gekkonid lizard Homopholis wahlbergii, to quantify sexual dimorphism, male and female reproductive cycles and diet. The largest male and female we recorded were 116 and 119 mm snout–vent length (SVL) respectively... -
Quantification of shell banding polymorphism in the East African tree snail Sitala jenynsi (Pulmonata: Ariophantidae)
Item type: Journal Article • Journal: African Zoology • Authors: Peter F. Kasigwa --- Department of Zoology, Tanzania John A. Allen --- School of Biological Sciences, University of Southampton, U.K.In eastern Africa, populations of the tree snail Sitala jenynsi are monomorphic, dimorphic or trimorphic for the width of the upper brown band on their shells.We measured the variation in the width of this band in several populations and analysed... -
Male flat lizards prefer females with novel scents
Item type: Journal Article • Journal: African Zoology • Authors: Belinda A. Lewis --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa Martin J. Whiting --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa Jessica Stapley --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South AfricaIn lizards, pheromonal cues are important for mate recognition and are expected to diverge during the speciation process. We tested for divergence in pheromonal mate and species recognition between male flat lizards (Platysaurus broadleyi) belonging to the same population, a... -
Phylogeography and genetic diversity of Psammophis schokari (Serpentes) in North Africa based on mitochondrial DNA sequences
Item type: Journal Article • Journal: African Zoology • Authors: C. Rato --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Portugal J. C. Brito --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Portugal M. A. Carretero --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Portugal S. Larbes --- Département de Biologie, Algeria B. Shacham --- Department of Evolution, Systematics & Ecology, Israel D. J. Harris --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, PortugalThe snake Psammophis schokari has a widespread distribution across North Africa, and in Morocco/Western Sahara is represented by three different morphotypes: striped, unicoloured and the Western-Sahara morph. ND4 mitochondrial DNA sequences from 28 specimens comprising 20 P. shokari, two P... -
Morphological characteristics of Cape sugarbirds (Promerops cafer) from Helderberg Nature Reserve
Item type: Journal Article • Journal: African Zoology • Authors: K. M. C. Tjørve --- Zoology Department, South Africa G. Scholtz --- , South AfricaCape sugarbirds (Promerops cafer) are the largest nectarivores in the Western Cape and feed almost exclusively on protea nectar and associated arthropods. Helderberg Nature Reserve, Western Cape, South Africa, has a large diversity of Protea and supports breeding sugarbirds. As... -
Comparative phylogeography of northwest African Natrix maura (Serpentes: Colubridae) inferred from mtDNA sequences
Item type: Journal Article • Journal: African Zoology • Authors: M. Barata --- Departamento de Zoologia e Antropologia, Faculdada de Ciências, Portugal D. J. Harris --- Departamento de Zoologia e Antropologia, Faculdada de Ciências, Portugal R. Castilho --- University of Algarve, PortugalWhile the comparative phylogeography of European fauna is relatively well understood, with Pleistocene climatic oscillations leading to ‘southern refugia’ for many species, the equivalent pattern has not been determined for North Africa. In this context variation within North African populations... -
Genetic variation among spiny-footed lizards in the Acanthodactylus pardalis group from North Africa
Item type: Journal Article • Journal: African Zoology • Authors: Miguel M. Fonseca --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Portugal José C. Brito --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Portugal Hugo Rebelo --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Portugal Mohsen Kalboussi --- Institut Sylvo-Pastoral, Tunisia Saïd Larbes --- Département de Biologie, Algeria Miguel A. Carretero --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Portugal D. James Harris --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, PortugalThe systematics of the genus Acanthodactylus was classically based on external morphological traits, osteological characters and morphology of the hemipenes. Although the identification of species complexes is relatively easy, the distinction within some groups is difficult due to a high... -
Haulout site selection by southern elephant seals at Marion Island
Item type: Journal Article • Journal: African Zoology • Authors: T. W. Mulaudzi --- Department of Zoology and Entomology, South Africa G. J. G. Hofmeyr --- National Zoological Gardens of South Africa, South Africa M. N. Bester --- National Zoological Gardens of South Africa, South Africa S. P. Kirkman --- National Zoological Gardens of South Africa, South Africa P. A. Pistorius --- National Zoological Gardens of South Africa, South Africa F. C. Jonker --- National Zoological Gardens of South Africa, South Africa A. B. Makhado --- National Zoological Gardens of South Africa, South Africa J. H. Owen --- Department of Statistics, South Africa R. J. Grimbeek --- Department of Statistics, South AfricaUsing data from an ongoing mark–resight programme at Marion Island, we tested empirically whether southern elephant seals prefer certain terrestrial sites to others during the breeding, moulting and winter haulouts, and whether the pattern of site use is the same... -
Sympatric Biomphalaria species (Gastropoda: Planorbidae) in Lake Albert, Uganda, show homoplasies in shell morphology
Item type: Journal Article • Journal: African Zoology • Authors: Maria Plam --- Mandahl-Barth Research Centre for Biodiversity in Developing Countries, DBL – Centre for Health Research and Development, Institute for Veterinary Pathology, Faculty of Life Sciences, University of Copenhagen, Copenhagen Aslak Jørgensen --- Mandahl-Barth Research Centre for Biodiversity in Developing Countries, DBL – Centre for Health Research and Development, Institute for Veterinary Pathology, Faculty of Life Sciences, University of Copenhagen, Copenhagen Thomas K. Kristensen --- Mandahl-Barth Research Centre for Biodiversity in Developing Countries, DBL – Centre for Health Research and Development, Institute for Veterinary Pathology, Faculty of Life Sciences, University of Copenhagen, Copenhagen Henry Madsen --- Mandahl-Barth Research Centre for Biodiversity in Developing Countries, DBL – Centre for Health Research and Development, Institute for Veterinary Pathology, Faculty of Life Sciences, University of Copenhagen, CopenhagenThe three known sympatric Biomphalaria species that occur in Lake Albert; B. choanomphala, B. stanleyi and B. sudanica, were studied using both molecular (COI, 16S and ITS) and shell morphometric data. An unidentified sample of 18 Biomphalaria specimens from Lake... -
Ecological conditions for spread of the invasive snail Physa marmorata (Pulmonata: Physidae) in the Ivory Coast
Item type: Journal Article • Journal: African Zoology • Authors: Y. K. Bony --- Université de Perpignan, France N. C. Kouassi --- Station de Recherche en Pisciculture, CNRA, Ivory Coast D. Diomandé --- Université d’Abobo-Adjamé, Ivory Coast G. Gourene --- Université d’Abobo-Adjamé, Ivory Coast M. Verdoit-Jarraya --- Université de Perpignan, France J. P. Pointier --- Université de Perpignan, FrancePhysa marmorata, originally described from the Lesser Antilles, was introduced into Africa before 1900 and has previously been reported from Bénin, Togo, Ghana, Nigeria and South Africa. Here we show that it is also common in temporary ponds, fish ponds,... -
Evidence for density dependent population regulation in southern elephant seals in the southern Indian Ocean
Item type: Journal Article • Journal: African Zoology • Authors: P. A. Pistorius --- Department of Zoology and Entomology, South Africa F. E. Taylor --- Department of Zoology and Entomology, South Africa M. N. Bester --- Department of Zoology and Entomology, South Africa G. J. G. Hofmeyr --- Department of Zoology and Entomology, South Africa S. P. Kirkman --- Department of Zoology and Entomology, South AfricaThe means by which populations are regulated form a central theme in conservation biology, and much debate has revolved around density dependence as a mechanism driving population change. Marion Island (46°54‘S, 37°45‘E) is host to a relatively small breeding population... -
Description of a new gnathiid, Afrignathia multicavea gen. et sp. n. (Crustacea: Isopoda: Gnathiidae), from South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Kerry A. Hadfield --- Department of Zoology, South Africa Nico J. Smit --- Department of Zoology, South AfricaA new genus and species of gnathiid isopod, Afrignathia multicavea gen. et sp. n., is described from material collected during the 1960s and 1970s in False Bay, offshore between Still Bay and Mossel Bay, and off Cape Point. This gnathiid... -
The status of habitat of great white and pink-backed pelicans in northeastern KwaZulu-Natal, South Africa: a review
Item type: Journal Article • Journal: African Zoology • Authors: Meyrick B. Bowker --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South Africa Colleen T. Downs --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South AfricaHabitat change, mainly through the actions of humans, poses a threat to great white (Pelecanus onocrotalus) and pink-backed (P. rufescens) pelicans in northeastern KwaZulu-Natal, the southernmost distributions of these species on Africa’s eastern seaboard. This study assessed the relative importance... -
Helminth parasites of amphibians from a rainforest reserve in southwestern Nigeria
Item type: Journal Article • Journal: African Zoology • Authors: M. S. O. Aisien --- Laboratory of Parasitology Research, University of Benin, Nigeria S. O. Ogoannah --- Department of Animal and Environmental Biology, Nigeria A. A. Imasuen --- Laboratory of Parasitology Research, University of Benin, NigeriaHelminth parasites of amphibians from the Gelegele Forest Reserve, a pristine forest in southwestern Nigeria, were investigated. Amphibians encountered included Amietophrynus maculatus, Hoplobatrachus occipitalis, Aubria subsigillata, Ptychadena longirostris, Ptychadena oxyrynchus, Ptychadena bibroni, Ptychadena pumilio, Chiromantis rufescens, Leptopelis hyloides, Hyperolius fusciventris... -
Lion predation on elephants in the Savuti, Chobe National Park, Botswana
Item type: Journal Article • Journal: African Zoology • Authors: R. John Power --- Carnivore Conservation Group, Endangered Wildlife Trust, De Beers Venetia Limpopo Nature Reserve, South Africa R. X. Shem Compion --- Carnivore Conservation Group, Endangered Wildlife Trust, De Beers Venetia Limpopo Nature Reserve, South AfricaLions rarely prey on elephants. Botswana‘s Savuti lions, however, switch to preying on elephants during the late dry season (August–November), and the frequency of this has increased in the last two decades (1985–2005). An opportunity to document this phenomenon was... -
Do dwarf chameleons (Bradypodion) show developmental plasticity?
Item type: Journal Article • Journal: African Zoology • Authors: Ashadee K. Miller --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa Graham J. Alexander --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South AfricaDevelopmental plasticity results from environmental influences on the phenotype of an organism during its development, and its effects are irreversible. The phenomenon of phenotype–genotype uncoupling (plasticity) causes problems in species delineations, and has been suggested as a cause underlying a... -
Cryptic lineages of little free-tailed bats, Chaerephon pumilus (Chiroptera: Molossidae) from southern Africa and the western Indian Ocean islands
Item type: Journal Article • Journal: African Zoology • Authors: Peter John Taylor --- Durban Natural Science Museum, South Africa Jennifer Lamb --- University of KwaZulu-Natal, South Africa Devendran Reddy --- University of KwaZulu-Natal, South Africa Theshnie Naidoo --- University of KwaZulu-Natal, South Africa Fanja Ratrimomanarivo --- Vahatra, Madagascar Steven M. Goodman --- Vahatra, MadagascarWe investigate mitochondrial DNA and craniometric variation in southern African and Malagasy populations of the small and morphologically variable, house-roosting molossid bat, Chaerephon pumilus in relation to Malagasy populations of the related, smaller-sized species, C. leucogaster. Both cytochrome b and... -
Description of larval fish composition, abundance and distribution in nine south and west coast estuaries of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: P. H. Montoya-Maya --- Department of Ichthyology and Fisheries Science, South Africa N. A. Strydom --- South African Institute for Aquatic Biodiversity, South AfricaThe composition, abundance and distribution of larval fishes from nine south and west coast estuaries from South Africa was investigated by plankton tow once per season between June 2003 and March 2004. A total of 49 274 early stage fishes... -
Morphometric variation in the Tunisian green frog, Rana saharica Anura: Ranidae)
Item type: Journal Article • Journal: African Zoology • Authors: Nabil Amor --- Research Unit: Genetics, Biodiversity and Bio-Resources Development, Biotechnology Institute of Monastir, Tunisia Sarra Farjallah --- Research Unit: Genetics, Biodiversity and Bio-Resources Development, Biotechnology Institute of Monastir, Tunisia Khaled Said --- Research Unit: Genetics, Biodiversity and Bio-Resources Development, Biotechnology Institute of Monastir, TunisiaRana saharica is the most widely distributed anuran in Tunisia. We examined morphological variation in 124 specimens as a function of their geographical origin, using univariate and multivariate statistics with traditional morphometrics. Our results supported the existence of three morphotypes... -
Innovative fluorescence detection technique for metals in cestode egg-shells
Item type: Journal Article • Journal: African Zoology • Authors: N. Degger --- Department of Zoology, South Africa A. Avenant-Oldewage --- Department of Zoology, South Africa R. Greenfield --- Department of Zoology, South AfricaRecent work in the field of parasitology has drawn attention to the application of parasites as pollution-accumulation indicators, particularly cestodes. A discrepancy in metal concentrations within cestode posterior and anterior tissue has led researchers to attribute this phenomenon to metals... -
Phylogeography of North African Amietophrynus xeros estimated from mitochondrial DNA sequences
Item type: Journal Article • Journal: African Zoology • Authors: E. Froufe --- CIBIO, Centro de Investigagao em Biodiversidade e Recursos Genéticos, Campus Agrá rio de Vairão, Portugal J. C. Brito --- Departamento de Zoologia e Antropologia, Portugal D. J. Harris --- CIBIO, Centro de Investigagao em Biodiversidade e Recursos Genéticos, Campus Agrá rio de Vairão, PortugalAmietophrynus xeros was sequenced for part of the 16S rRNA mitochondrial region to assess genetic diversity between populations from Niger, Mali, Senegal, Mauritania and Tanzania. Although populations are currently unconnected, diversity within the Sahel region was relatively low, indicating that... -
West Africa’s Atlantic humpback dolphin (Sousa teuszii ): endemic, enigmatic and soon Endangered?
Item type: Journal Article • Journal: African Zoology • Authors: Caroline R. Weir --- Ketos Ecology, U.K. Koen Van Waerebeek --- Conservation and Research of West African Aquatic Mammals, Ghana Thomas A. Jefferson --- Clymene Enterprises, U.S.A. Tim Collins --- Ocean Giants Program, Wildlife Conservation Society, U.S.A.Atlantic humpback dolphins (Sousa teuszii ) are endemic to nearshore West African waters between Western Sahara and Angola. They are considered Vulnerable by the International Union for Conservation of Nature based on restricted geographic range, low abundance and apparent decline... -
Flea diversity on small carnivores in the Northern Cape Province, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: S. Matthee --- Department of Conservation Ecology and Entomology, South Africa L. van der Mescht --- Department of Conservation Ecology and Entomology, South Africa B. Wilson --- Zoologist, McGregor Museum, South Africa N. Lamberski --- Veterinary Clinical Operations Manager, San Diego Zoo’s Wild Animal Park, U.S.A.Small carnivores are parasitized by various ectoparasites that include fleas (Siphonaptera). To date few parasite studies in South Africa, and especially the Northern Cape, have focused on fleas, while those that have are biased by small sample sizes. In an... -
Plankton dynamics associated with the convergence zone of a shear front in the permanently open Kowie Estuary, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: M. Kruger --- Department of Ichthyology and Fisheries Science, South Africa N. A. Strydom --- Department of Zoology, South AfricaEstuarine frontal systems are thought to play an important role in plankton accumulations in estuaries. However, knowledge surrounding these estuarine circulation patterns is not clear, and consensus regarding the importance of fronts has yet to be reached. A full appraisal... -
Aspects of the ecology of Cichlidogyrus philander collected from Pseudocrenilabrus philander philander from the Padda Dam, Gauteng, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Louise E. le Roux --- Department of Zoology, South Africa A. Avenant-Oldewage --- Department of Zoology, South Africa F. C. van der Walt --- Department of Statistics, South AfricaCichlidogyrus philander was originally described from Pseudocrenilabrus philander philander in Lake Kariba, Zimbabwe. Specimens from four fish species were collected during this study over a 14-month period from the Padda Dam, Johannesburg, transported to the laboratory and killed. Following examination,... -
Vagrant Subantarctic fur seal in the Mayumba National Park, Gabon
Item type: Journal Article • Journal: African Zoology • Authors: R. Zanre --- Mayumba Project Manager, Wildlife Conservation Society, Gabon M. N. Bester --- Department of Zoology and Entomology, South AfricaA vagrant adult male Subantarctic fur seal Arctocephalus tropicalis was seen and photographed on the beach in Mayumba National Park in the Gabonese Republic. This is the northern most sighting on record for the species. The likely source of the... -
Trophic structure and biomass distribution of macrobenthos on sheltered and semi-exposed rocky shores of Tsitsikamma Marine Protected Area
Item type: Journal Article • Journal: African Zoology • Authors: Nicholas Hanekom --- South African National Parks, South AfricaThe trophic structure and biomass of macrobenthos on both wave-sheltered, rocky intertidal shores and semi-exposed ones at seven localities in the Tsitsikamma Marine Protected Area were compared. In the Cochlear zone and entire intertidal (Cochlear- and Balanoid zones combined) biomass... -
Exploring the diversity and molecular evolution of shrews (family Soricidae) using mtDNA cytochrome b data
Item type: Journal Article • Journal: African Zoology • Authors: Sandi Willows-Munro --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa Conrad A. Matthee --- Evolutionary Genomics Group, Department of Botany and Zoology, South AfricaThe taxonomy of the shrews (family Soricidae) is primarily underpinned by the analysis of morphology characters. These morphological characters are, however, often plesiomorphic and difficult to interpret in an evolutionarily meaningful way. Recent molecular studies have provided some clarity at... -
Ontogenetic dietary shift and morphological correlates for Diplodus capensis (Teleostei: Sparidae) in southern Angola
Item type: Journal Article • Journal: African Zoology • Authors: Timothy J. Richardson --- Department of Ichthyology and Fisheries Science, South Africa Warren M. Potts --- Department of Ichthyology and Fisheries Science, South Africa Carmen V. Santos --- Faculdade Ciências da Universidade Agostinho Neto (FCUAN), Angola Warwick H.H. Sauer --- Department of Ichthyology and Fisheries Science, South AfricaAllometric growth patterns of functional morphological variables that reflect resource use in fish were correlated with the diet of Diplodus capensis in southern Angola. A total of 114 individuals (76–336 mm FL) were collected for stomach content analysis and a... -
Resolving the confusion: Amietia vertebralis and A. umbraculata tadpole morphology
Item type: Journal Article • Journal: African Zoology • Authors: Donnavan J.D. Kruger --- School of Environmental Sciences and Development, North-West University, Potchefstroom Campus, South Africa Ché Weldon --- School of Environmental Sciences and Development, North-West University, Potchefstroom Campus, South Africa Louis H. Du Preez --- School of Environmental Sciences and Development, North-West University, Potchefstroom Campus, South AfricaMorphological similarities between the tadpoles of Amietia umbraculata and A. vertebralis have led to confusion and incorrect descriptions and identifications in the literature. Based on 33 body measurements and ratios we revised the morphological descriptions of the tadpoles of the... -
Parasitic infections of amphibians in the Pendjari Biosphere Reserve, Benin
Item type: Journal Article • Journal: African Zoology • Authors: M.S.O. Aisien --- Laboratory of Parasitology Research, Department of Animal and Environmental Biology, Faculty of Life Sciences, Nigeria S.G.A. Nago --- Faculté des Sciences Agronomiques, Université d’Abomey-Calavi, Bénin M.O. Rödel --- Museum für Naturkunde, Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, Herpetology, GermanyThe parasitic infections of amphibians in the National Park (pristine savanna), Buffer Zone (slightly altered savanna closer to fields) and Agricultural Zone (agricultural land including cotton fields with intensive use of pesticides) of the Pendjari Biosphere Reserve, Benin, were investigated... -
Yellow-bellied or white-bellied? Identity of Arabian house bats (Vespertilionidae: Scotophilus) revealed from mitochondrial DNA and morphology
Item type: Journal Article • Journal: African Zoology • Authors: Peter Vallo --- Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Czech Republic Petr Benda --- Department of Zoology, Czech Republic Antonín Reiter --- South Moravian Museum in Znojmo, Czech RepublicThe yellow-bellied Scotophilus dinganii is the only African house bat species reported to occur in the Arabian Peninsula. Formerly, the Arabian house bats were referred to similar-looking white-bellied S. leucogaster, which differs from S. dinganii mainly by the colour of... -
Spatial and temporal population dynamics of rodents in three geographically different regions in Africa: Implication for ecologically-based rodent management
Item type: Journal Article • Journal: African Zoology • Authors: Apia W. Massawe --- Pest Management Centre, Sokoine University of Agriculture, Tanzania Loth S. Mulungu --- Pest Management Centre, Sokoine University of Agriculture, Tanzania Rhodes H. Makundi --- Pest Management Centre, Sokoine University of Agriculture, Tanzania Nomfundo Dlamini --- Department of Biological Sciences, Swaziland Seth J. Eiseb --- National Museum of Namibia, Namibia Frikkie Kirsten --- Agricultural Research Council-Plant Protection Research Institute, South Africa Themb’alilahlwa Mahlaba --- Department of Biological Sciences, Swaziland Phanuel Malebane --- Agricultural Research Council-Plant Protection Research Institute, South Africa Emil Von Maltitz --- Agricultural Research Council-Plant Protection Research Institute, South Africa Ara Monadjem --- Department of Biological Sciences, Swaziland Peter Taylor --- Durban Natural Science Museum, Heritage and Libraries Department, South Africa Vassana Tutjavi --- National Museum of Namibia, Namibia Steven R. Belmain --- Natural Resources Institute, University of Greenwich, U.K.As part of a three-year study to develop ecologically-based rodent management (EBRM) in southern Africa, a capture–mark–recapture study was carried out in Tanzania, Namibia and Swaziland to establish the demographic patterns and population dynamics of rodents. Two study grids were... -
Laboratory evaluation of germinated and non-germinated bait base for the management of the house rat, Rattus rattus
Item type: Journal Article • Journal: African Zoology • Authors: Palaniyandi Sakthivel --- Research Department of Zoology, India Periyasamy Neelanarayanan --- Research Department of Zoology, IndiaGerminated and non-germinated cereals (paddy, Oryza sativa; pearl millet, Pennisetum typhoides; and ragi, Eleusine coracana) and pulses (green gram, Phaseolus aureus; black gram, Phaseolus mungo; and Bengal gram, Cicer arietinum) were evaluated to determine their suitability as a bait base... -
West-Central African Pleistocene lowland forest evolution revealed by the phylogeography of Misonne’s soft-furred mouse
Item type: Journal Article • Journal: African Zoology • Authors: Violaine Nicolas --- Département de Systématique et Evolution, France Alain-Didier Missoup --- Département de Systématique et Evolution, France Marc Colyn --- UMR CNRS 6553 Ecobio, Université de Rennes 1, Station Biologique, France Corinne Cruaud --- Genoscope, Centre National de Sequençage, 2, rue Gaston Crémieux, France Christiane Denys --- Département de Systématique et Evolution, FranceWe studied the phylogeographical structure of Praomys misonnei (Rodentia: Muridae) in west-Central Africa based on 113 individuals from 31 localities and the sequencing of two mitochondrial genes (Cytb and CO1). Two clades can be identified through maximum likelihood, bayesian and... -
Gastrointestinal protozoa and digestive tract parameters of wild South African warthogs (Phacochoerus aethiopicus)
Item type: Journal Article • Journal: African Zoology • Authors: D.G. Booyse --- Department of Anatomy and Physiology, B.A. Dehority --- Department of Animal Sciences,The warthog (Phacochoerus aethiopicus) is a grazer and hindgut fermenter with an apparent unique population of protozoa; however, only a limited number of specimens have been studied to date. In addition to having a very low number of protozoal species,... -
Past connection of the upper reaches of a Lake Tanganyika tributary with the upper Congo drainage suggested by genetic data of riverine cichlid fishes
Item type: Journal Article • Journal: African Zoology • Authors: S. Koblmüller --- Department of Zoology, Austria C. Katongo --- Department of Biological Sciences, Zambia H. Phiri --- Department of Fisheries, Zambia C. Sturmbauer --- Department of Zoology, AustriaThe Lufubu River is the largest tributary to the southern Lake Tanganyika and its upper reaches are eparated from the lake by rapids that prevent upstream movement of lacustrine fish. Thus, the ichthyofauna of the upper Lufubu River is clearly... -
Rediscovery of Boulengerula denhardti Nieden 1912 (Amphibia: Gymnophiona: Caeciliidae) in Meru County, Kenya
Item type: Journal Article • Journal: African Zoology • Authors: G. John Measey --- Department of Zoology, South Africa Vincent Muchai --- Section of Herpetology, National Museums of Kenya, Kenya Stephen Spawls --- 7 Crostwick Lane, Spixworth, U.K.The dearth of information on caecilian amphibians is most likely due to a lack of directed field studies. Here we report the rediscovery of a population of Boulengerula denhardti nearly a century after its description by Nieden in 1912. Morphological... -
Post-weaning social behaviour within mother–offspring groups of the bushveld gerbil, Gerbilliscus leucogaster: implications for dispersal
Item type: Journal Article • Journal: African Zoology • Authors: Tracy K. Lötter --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa Neville Pillay --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South AfricaSocial behaviour has been implicated in the natal dispersal of several small mammal species. We studied social interactions within groups of bushveld gerbil Gerbilliscus leucogaster mothers and their weaned offspring in captivity. We examined groups (n = 8) over several... -
Breeding season of Epomophorus walhbergi in the lowveld of Swaziland
Item type: Journal Article • Journal: African Zoology • Authors: Ara Monadjem --- All Out Africa Research Unit, Department of Biological Sciences, Swaziland April E. Reside --- Centre for Tropical Biodiversity and Climate Change, James Cook University, AustraliaThe fruit bat Epomophorus wahlbergi is abundant in the eastern parts of southern Africa, but its breeding biology remains poorly documented. This study aimed to ascertain the breeding season of this species in northeastern Swaziland where 340 individuals were netted... -
Post-weaning changes in the digestive physiology and caecal fermentative activity in the greater cane rat (Thryonomys swinderianus)
Item type: Journal Article • Journal: African Zoology • Authors: Y.M. Yapi --- National Polytechnic Institute Houphouët-Boigny of Yamoussoukro, Ivory Coast T. Gidenne --- INRA, UMR1289 Tissus Animaux Nutrition Digestion Ecosystème et Métabolisme, France Y. Farizon --- Université de Toulouse INPT ENVT, UMR1289 Tissus Animaux Nutrition Digestion Ecosystème et Métabolisme, France M. Segura --- INRA, UMR1289 Tissus Animaux Nutrition Digestion Ecosystème et Métabolisme, France D. Zongo --- National Polytechnic Institute Houphouët-Boigny of Yamoussoukro, Ivory Coast F. Enjalbert --- Université de Toulouse INPT ENVT, UMR1289 Tissus Animaux Nutrition Digestion Ecosystème et Métabolisme, FranceThe greater cane rat is a recently domesticated monogastric herbivore, and the importance of the caecum in the functioning of its digestive tract has frequently been mentioned. However, no data are available on caecal fermentative activity of this animal and... -
The first record of Tardigrada from Zambia, with a description of Doryphoribius niedbalai n.sp. (Eutardigrada: Isohypsibiidae, the evelinae group)
Item type: Journal Article • Journal: African Zoology • Authors: Krzysztof Zawierucha --- Department of Animal Taxonomy and Ecology, Faculty of Biology, Poland Łukasz Michalczyk --- Department of Entomology, Poland Łukasz Kaczmarek --- Department of Animal Taxonomy and Ecology, Faculty of Biology, PolandIn three mixed samples (mosses and leaf litter) collected in Zambia (southern Africa), forty-three specimens and six eggs of eutardigrades were found. Among them, 29 specimens belonged to a new species of the family Isohypsibiidae, Doryphoribius niedbalai n.sp. The new... -
Activity of the greater padloper, Homopus femoralis (Testudinidae), in relation to rainfall
Item type: Journal Article • Journal: African Zoology • Authors: Victor J.T. Loehr --- Homopus Research Foundation, NetherlandsThe greater padloper, Homopus femoralis, is largely endemic to South Africa. Its ecology remains unstudied, yet the efficient planning of field research is complicated by lack of data on its activity patterns. I studied a population in spring, summer and... -
New status for two African giant forest shrews, Crocidura goliath goliath and C. goliath nimbasilvanus (Mammalia: Soricomorpha), based on molecular and geometic morphometric analyses
Item type: Journal Article • Journal: African Zoology • Authors: F. Jacquet --- Département de Systématique et Evolution, Muséum National d’Histoire Naturelle, France R. Hutterer --- Section of Mammals, Zoologisches Forschungmuseum A. Koenig, Germany V. Nicolas --- Département de Systématique et Evolution, Muséum National d’Histoire Naturelle, France J. Decher --- Department of Biology, U.S.A. M. Colyn --- Université de Rennes 1, CNRS, France A. Couloux --- Génoscope, Centre National de Séquenç age, France C. Denys --- Département de Systématique et Evolution, Muséum National d’Histoire Naturelle, FranceCrocidura goliath nimbasilvanus Hutterer, 2003 (replacement name for C. odorata guineensis Heim de Balsac, 1968) from West Africa (Guinea, Liberia, Ivory Coast) and Crocidura goliath goliath Thomas, 1906 from Central Africa (Cameroon, Central African Republic, Gabon, Republic of Congo, Democratic... -
A case of natural queen succession in a captive colony of naked mole-rats, Heterocephalus glaber
Item type: Journal Article • Journal: African Zoology • Authors: L. A. van der Westhuizen --- Department of Zoology, South Africa J. U. M. Jarvis --- Department of Zoology, South Africa N. C. Bennett --- Department of Zoology & Entomology, South AfricaNaked mole-rats occur in large colonies where usually a single queen monopolizes reproduction. Queen succession occurs from within usually as a result of aggressive encounters with subordinate females that queue for reproductive succession following colony instability, which inevitably results in... -
Chromosomal rearrangements occurred repeatedly and independently during species diversification in Malagasy geckos, genus Paroedura
Item type: Journal Article • Journal: African Zoology • Authors: Gennaro Aprea --- Dipartimento di Biologia, Italy Franco Andreone --- Museo Regionale di Scienze Naturali, Italy Domenico Fulgione --- Dipartimento di Biologia, Italy Agnese Petraccioli --- Dipartimento di Biologia, Italy Gaetano Odierna --- Dipartimento di Biologia, ItalyWe conducted a phylogenetic study through karyological data, by standard staining and Ag-NOR banding, and molecular analysis (by 12S and 16S mitochondrial rRNA genes and nuclear gene C-mos) on 11 species of Malagasy geckos, genus Paroedura, and two relatives (Ebenavia... -
Stable Pleistocene-era populations of Chaerephon pumilus (Chiroptera: Molossidae) in southeastern Africa do not use different echolocation calls
Item type: Journal Article • Journal: African Zoology • Authors: Theshnie Naidoo --- School of Life Sciences, University of KwaZulu-Natal, South Africa M. Corrie Schoeman --- School of Life Sciences, University of KwaZulu-Natal, South Africa Peter J. Taylor --- School of Life Sciences, University of KwaZulu-Natal, South Africa Steven M. Goodman --- Association Vahatra, Madagascar Jennifer M. Lamb --- School of Life Sciences, University of KwaZulu-Natal, South AfricaOur extension of the phylogenetic study of Taylor et al. (2009) on a larger, more geographically representative sample confirmed their finding of genetically distinct sympatric lineages of bats currently referred to as Chaerephon pumilus sensu lato (s.l.) (family Molossidae) in... -
Does supplemental feeding affect behaviour and foraging of critically endangered western giant eland in an ex situ conservation site?
Item type: Journal Article • Journal: African Zoology • Authors: Pavla Hejcmanová --- Faculty of Tropical AgriSciences, Czech University of Life Sciences, Czech Republic Pavla Vymyslická --- Faculty of Environmental Sciences, Czech University of Life Sciences, Czech Republic Magdalena Žáčková --- Faculty of Environmental Sciences, Czech University of Life Sciences, Czech Republic Michal Hejcman --- Faculty of Environmental Sciences, Czech University of Life Sciences, Czech RepublicThe western giant eland (Tragelaphus derbianus derbianus) needs appropriate management for its survival. We measured the effects of supplemental food on activity and browsing patterns during seasons of scarce natural food resources in 2008 and 2009 for a herd of... -
Ectoparasites of a non-indigenous warthog population, Phacochoerus africanus, in the Free State Province, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Sonja Matthee --- Department of Conservation Ecology and Entomology, South Africa Monlee Swanepoel --- Department of Conservation Ecology and Entomology, South Africa Luther van der Mescht --- Department of Conservation Ecology and Entomology, South Africa Alison J. Leslie --- Department of Conservation Ecology and Entomology, South Africa Louw C. Hoffman --- Department of Animal Sciences, South AfricaA population of the common warthog, Phacochoerus africanus, recently became established on several farms in the Free State Province, South Africa. The aim of the study was to record ectoparasite species that occur on this non-indigenous population and to compare... -
Phylogeography of Buthus Leach, 1815 (Scorpiones: Buthidae): a multigene molecular approach reveals a further complex evolutionary history in the Maghreb
Item type: Journal Article • Journal: African Zoology • Authors: Diana Pedroso --- CIBIO, Centro de Investigaçço em Biodiversidade e Recursos Genèticos, Campus Agrário de Vairço, Rua Padre Armando Quintas, Portugal Pedro Sousa --- CIBIO, Centro de Investigaçço em Biodiversidade e Recursos Genèticos, Campus Agrário de Vairço, Rua Padre Armando Quintas, Portugal D. James Harris --- CIBIO, Centro de Investigaçço em Biodiversidade e Recursos Genèticos, Campus Agrário de Vairço, Rua Padre Armando Quintas, Portugal Arie Van der Meijden --- CIBIO, Centro de Investigaçço em Biodiversidade e Recursos Genèticos, Campus Agrário de Vairço, Rua Padre Armando Quintas, PortugalThe distribution of the scorpion genus Buthus Leach, 1815 includes southwestern Europe, North and Central Africa and extends east towards the Arabian Peninsula. Phylogenetic relationships within the genus are complex and remain partially unresolved despite several previous assessments. A set... -
A report of symbiotic Siphonostomatoida (Copepoda) infecting mobulids (Rajiformes: Mobulidae) off the KwaZulu-Natal coast, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Modjadji C. Lebepe --- Department of Biodiversity, South Africa Susan M. Dippenaar --- Department of Biodiversity, South AfricaThough South Africa is rich in aquatic species, little is known about the diversity and distribution of copepods that parasitize different hosts ranging from invertebrates to marine mammals. A total of 43 mobulids (34 Mobula kuhlii; two Mobula eregoodootenkee and... -
Population density and habitat preferences of forest duikers in Moukalaba-Doudou National Park, Gabon
Item type: Journal Article • Journal: African Zoology • Authors: Yoshihiro Nakashima --- Graduate School of Science, Kyoto University, Japan Eiji Inoue --- Graduate School of Science, Kyoto University, Japan Etienne-François Akomo-Okoue --- Insititut de Recherche en Ecologie Tropicale/CENAREST Gabon, GabonWe conducted a line-transect survey via direct observation to estimate the densities of forest duikers in Moukalaba-Doudou National Park, Gabon. Five 2-km line transects were established in different vegetation types, and each transect was walked at 1.0 km/h. We also... -
New evidence of homoplasy within the African genus Varicorhinus (Cyprinidae): an independent origin of specialized scraping forms in the adjacent drainage systems of Ethiopia inferred from mtDNA analysis
Item type: Journal Article • Journal: African Zoology • Authors: Boris A. Levin --- Institute of Biology of Inland Waters, Russian Academy of Sciences, Russia Alexander S. Golubtsov --- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Russia Yuri Yu. Dgebuadze --- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Russia Nikolai S. Mugue --- Koltsov Institute of Developmental Biology, Russian Academy of Sciences, RussiaInterrelationships of the two specialized scraping periphyton-feeders, Varicorhinus beso and V. jubae, and some large African barbs, Labeobarbus spp., inhabiting three main regions of Ethiopia (the Western and Eastern Plateaus, and the Rift Valley separating them) were investigated using the... -
The occurrence of taste buds in adults of the terrestrial ceacilian Boulengerula boulengeri Tornier, 1898 (Lissamphibia: Gymnophiona: Herpelidae)
Item type: Journal Article • Journal: African Zoology • Authors: Karolina A. Budzik --- Department of Comparative Anatomy, Poland Krystyna Żuwała --- Department of Comparative Anatomy, Poland G. John Measey --- Department of Zoology, South AfricaTwo generations of gustatory organs occur during amphibian ontogeny in frogs and salamanders (Anura and Caudata), and are classified as taste buds or taste discs. Taste buds are present in larval forms, whereas taste discs are typical for adults. The... -
Taxonomic and phylogenetic utility of variation in advertising calls of francolins and spurfowls (Galliformes: Phasianidae)
Item type: Journal Article • Journal: African Zoology • Authors: Tshifhiwa G. Mandiwana-Neudani --- Department of Biodiversity, South Africa Rauri C. K. Bowie --- Department of Biological Sciences, South Africa Martine Hausberger --- Université de Rennes 1, France Laurence Henry --- Université de Rennes 1, France Timothy M. Crowe --- Department of Biological Sciences, South AfricaSystematists have not often made use of avian vocalizations to assess the taxonomic rank of birds, or to infer their phylogenetic relationships. The likely reasons for this stem from the perceived inability to distinguish genetic and ecological components of variation... -
Zooplankton and diatoms of temporary and permanent freshwater pans in the Mpumalanga Highveld region, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Luisa Riato --- Department of Paraclinical Sciences, South Africa Carin Van Ginkel --- Cripsis Environment, South Africa Jonathan C. Taylor --- School of Biological Sciences, North-West University, South AfricaThis paper provides a description of the zooplankton and epiphytic diatom communities of permanent and temporary freshwater pans in the Mpumalanga Highveld region of South Africa. Few studies have investigated the biota of pans in this area, which is seriously... -
Genetic variation in a North African rodent pest, Meriones shawi: microsatellite polymorphism
Item type: Journal Article • Journal: African Zoology • Authors: Aude Lalis --- Département Systématique et Evolution, France Josie Lambourdière --- Service de Systématique Moléculaire, Muséum National d’Histoire Naturelle, FranceMeriones shawi is an ubiquitous and endemic rodent in northern African. This species is considered as an economically important pest because it often damages crops. Moreover, the gerbillines are known to function as reservoirs for a variety of serious human... -
Roost temperature and fidelity of Wahlberg’s epauletted fruit bat, Epomophorus wahlbergi, in an urban environment
Item type: Journal Article • Journal: African Zoology • Authors: Dominic P. Rollinson --- School of Life Sciences, University of KwaZulu-Natal, South Africa Joy C. Coleman --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T. Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaGenerally,Wahlberg’s epauletted fruit bat (Epomophorus wahlbergi) roost in trees or under the eaves of buildings. This study investigated the roosting dynamics of E. wahlbergi in the urban environment of Pietermaritzburg, South Africa. To determine roost fidelity bats were radiotracked to... -
Adaptations to life on arid islands of South Africa: renal performance and phenotypic plasticity in the European rabbit Oryctolagus cuniculus
Item type: Journal Article • Journal: African Zoology • Authors: Gareth J. Tate --- Department of Biological Sciences, South Africa Heather G. Marco --- Department of Biological Sciences, South AfricaMorphological parameters of the mammalian kidney can provide information on the extent to which an animal is able to regulate water relations within its body and cope with arid conditions. Certain groups of mammals, such as rabbits and hares, show... -
Ecology of diplostomid (Trematoda: Digenea) infection in freshwater fish in southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Andri Grobbelaar --- Department Zoology and Entomology, South Africa Liesl L. Van As --- Department Zoology and Entomology, South Africa Hennie J.B. Butler --- Department Zoology and Entomology, South Africa Jo G. Van As --- Department Zoology and Entomology, South AfricaThe complex life cycles of most trematode parasites include three hosts. The first intermediate host is a snail, the second is normally a teleost fish and a piscivorous bird serves as the definitive host. Lymnaeid snails are most likely to... -
Sexing monomorphic western mountain greenbuls on Mount Cameroon using morphometric measurements
Item type: Journal Article • Journal: African Zoology • Authors: Eric Djomo Nana --- Department of Ecology, Czech Republic Pavel Munclinger --- Department of Zoology, Czech Republic Michal Ferenc --- Department of Ecology, Czech Republic Ondřej Sedlàček --- Department of Ecology, Czech Republic Tomàč Albrecht --- Department of Zoology, Czech Republic David Hořàk --- Department of Ecology, Czech RepublicThe western mountain greenbul, Andropadus tephrolaemus, is a poorly-known monomorphic forest greenbul. We investigated whether morphological measurements could be used to discriminate between sexes of this species, with a sample of birds captured in two forest types on Mt Cameroon... -
Dynamics of recruitment of larval and juvenile Cape stumpnose Rhabdosargus holubi (Teleostei: Sparidae) into the Swartkops and Sundays estuaries, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Y Kisten --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa P Pattrick --- Department of Zoology, South Africa NA Strydom --- Department of Zoology, South Africa R Perissinotto --- DST/NRF Research Chair in Shallow Water Ecosystems, South AfricaRecruitment of early life stages into estuaries is an integral part of the life cycle of many marine fish species. Although estuaries are naturally environmentally dynamic, they also are subject to anthropogenic disturbances, including land use and climate change, which... -
High population connectivity and Pleistocene range expansion in the direct-developing plough shell Bullia rhodostoma along the South African coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Muteveri --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa CA Matthee --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa RCK Bowie --- Museum of Vertebrate Zoology and Department of Integrative Biology, USA S von der Heyden --- Evolutionary Genomics Group, Department of Botany and Zoology, South AfricaPleistocene climatic and oceanographic changes have influenced the distribution of marine biodiversity in southern Africa. Most evidence, however, has been derived from rocky shore or demersal taxa; data on sandy shore species are limited, despite severe threats to many sandy... -
Intraguild predation and partial consumption of blue sharks Prionace glauca by Cape fur seals Arctocephalus pusillus pusillus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Fallows --- Apex Expeditions, South Africa HP Benoît --- Fisheries and Oceans Canada, Canada N Hammerschlag --- Rosenstiel School of Marine and Atmospheric Science, USAThe top-down effects of predators on ecosystem structure and dynamics have been studied increasingly. However, the nature and consequence of trophic interactions between upper-trophic-level predators have received considerably less attention. This is especially the case in marine systems due to... -
Spinner dolphins Stenella longirostris off south-west Mauritius: abundance and residency
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Webster --- Mauritius Marine Conservation Society, Mauritius VG Cockcroft --- Centre for Dolphin Studies, Department of Zoology, South Africa A Cadinouche --- SEABIOME, MauritiusSpinner dolphins Stenella longirostris longirostris off the south-west coast of Mauritius are subject to ongoing anthropogenic disturbance in the form of daily dolphin tourism, which has intensified since 1998. Abundance of this species was estimated using photo-identification data and mark-recapture... -
Fire and the dynamics of two unpalatable grass species (Cymbopogon pospischilii and Elionurus muticus) in a semi-arid climate
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Hennie A Snyman --- Animal, Wildlife and Grassland Sciences, South AfricaCymbopogon pospischilii and Elionurus muticus are unpalatable for most of the growing season and form a reasonably large component of the vegetation composition in semi-arid grassland areas. The influence of an accidental fire on the dynamics of these two grass... -
Exploring the bullying behaviours experienced by South African domestic workers
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Yolo-loyolo Maboyana --- Department of Industrial Psychology and People Management, South Africa Lusanda Sekaja --- Department of Industrial Psychology and People Management, South AfricaThis article phenomenologically explores the nature of bullying behaviours as experienced by domestic workers in South Africa. Participants were a convenience sample of 10 black female domestic workers (age range = 27 to 53 years, work experience = 3 to... -
How do African Black Oystercatchers Haematopus moquini recruit into high-density populations?
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Douglas Loewenthal --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Dane M Paijmans --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaTheoretical and empirical studies of oystercatchers both suggest that levels of adult site fidelity, natal philopatry and age-at-first-breeding are interrelated consequences of life-history decisions made by potential breeders. All are fundamental to explaining population dynamics and have important conservation implications... -
Temporal and spatial differences in three-egg clutch frequency of the African Black Oystercatcher
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Dane M Paijmans --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Douglas Loewenthal --- , Peter G Ryan --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- ,African Black Oystercatchers Haematopus moquini produce a modal clutch size of two eggs and only rarely lay three eggs. A review of over 4 000 nest records from across their breeding range (dating back to the early 1960s) revealed that... -
Food abundance explains the breeding season of a tropical shorebird, the Crab Plover Dromas ardeola
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Giuseppe De Marchi --- Dipartimento di Scienze della Terra e dell'Ambiente, Italy Giorgio Chiozzi --- Museo Civico di Storia Naturale, Italy Dawit Semere --- Research Division, Eritrea Yohannes Mebrahtu --- Research Division, Eritrea Farhad Hosseini Tayefeh --- Department of the Environment Provincial Office, Iran Mohammed Almalki --- Department of Biology, College of Science, Kingdom of Saudi Arabia Mauro Fasola --- Dipartimento di Scienze della Terra e dell'Ambiente, ItalyThe timing of breeding in birds is a life-history trait that generally depends on food availability, but other factors may play a role, particularly in tropical areas where food availability is less seasonal than in temperate or polar areas. We... -
Comparative and theoretical framework of Brazilian hospitality studies
Item type: Journal Article • Journal: • Authors: Elizabeth K. Wada --- School of Hospitality and Tourism, Anhembi Morumbi University, São Paolo, Brazil Airton José Cavenaghi --- School of Hospitality and Tourism, Anhembi Morumbi University, São Paolo, Brazil Maria do Rosário Rolfsen Salles --- School of Hospitality and Tourism, Anhembi Morumbi University, São Paolo, BrazilThe purpose of this article is to give a summary of the bibliographical production of the first publications made by the Master’s Programme in Hospitality at the Anhembi Morumbi University, São Paolo, the compilations edited by Célia Maria de Moraes... -
Phenotypic characterisation of sweetpotato genotypes grown in East and Central Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Rukundo Placide --- African Centre for Crop Improvement, South Africa Hussein Shimelis --- African Centre for Crop Improvement, South Africa Mark Laing --- African Centre for Crop Improvement, South Africa Daphrose Gahakwa --- Rwanda Agriculture Board, RwandaIdentification of genetic variability and interrelationships among germplasm collections is fundamental to select parents with complementary traits for plant breeding programmes. The aim of this study was to characterise and identify breeding parents among 54 sweetpotato genotypes grown in Rwanda,... -
Growth, physiology and yield responses of Amaranthus cruentus, Corchorus olitorius and Vigna unguiculata to plant density under drip-irrigated commercial production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Innocent Maseko --- University of South Africa, South Africa Yacob G Beletse --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Noluyolo Nogemane --- University of South Africa, South Africa CP du Plooy --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Tafadzwanashe Mabhaudhi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaAmaranthus cruentus, Corchorus olitorius and Vigna unguiculata are traditional leafy vegetables with potential to improve nutritional security of vulnerable people. The promotion of these crops is partly hindered by the lack of agronomic information. The effect of plant spacing on... -
Effect of conventional and organic orchard floor management practices on enzyme activities and microbial counts in a ‘Cripp's Pink’/M7 apple orchard
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: André H Meyer --- Agricultural Research Council–Infruitec-Nietvoorbij, South Africa John Wooldridge --- Agricultural Research Council–Infruitec-Nietvoorbij, South Africa Joanna F Dames --- Department of Biochemistry and Microbiology, South AfricaOrganic (ORG) production practices are increasingly being used in South African apple orchards. Whether ORG orchard floor management practices differ in their effects on soil enzyme activities and microbial populations from conventional (CON) practices have not been adequately investigated, particularly... -
Allelopathic effects of invasive Eucalyptus camaldulensis on germination and early growth of four native species in the Western Cape, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sheunesu Ruwanza --- Centre for Invasion Biology, Department of Botany and Zoology, South Africa Mirijam Gaertner --- Centre for Invasion Biology, Department of Botany and Zoology, South Africa Karen J Esler --- Centre for Invasion Biology, Department of Conservation Ecology and Entomology, South Africa David M Richardson --- Centre for Invasion Biology, Department of Botany and Zoology, South AfricaEucalyptus camaldulensis Dehnh. (red river gum; Myrtaceae) is an invasive tree in riparian habitats of the Western Cape, South Africa, where it replaces indigenous vegetation and affects ecosystem functioning. These invasions lead to changes in river geomorphology and reduction in... -
Growth models for six Eucalyptus species in Angola
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Cristobal Delgado-Matas --- Faculty of Agrarian Sciences, Angola Timo Pukkala --- Faculty of Science and Forestry, FinlandThis study developed growth models for Eucalyptus saligna Sm., E. camaldulensis Dehnh., E. macarthurii H.Deane & Maiden, E. resinifera Sm., E. siderophloia Benth. and E. grandis Hill ex. Maiden, for the central highlands of Angola, and used these models to... -
The effect on taxpayers of new tax legislation regarding foreign exchange transactions
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: R Oberholzer --- Department of Taxation, J S Wilcocks --- School of Applied Accountancy,Numerous problems have been encountered with the practical application of the new taxation legislation relating to foreign currency transactions. The purpose of this paper is to analyse the amendments relating to foreign exchange transactions and to illustrate, by using examples,... -
An analysis of certain issues relating to the taxation of equity instruments
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: D A Warneke --- Department of Accounting, R D Jooste --- Department of Commercial Law,In this article we examine certain issues associated with Section 8C and other important and frequently encountered related provisions of the Income Tax Act. The issues examined relate to: the difference in tax treatment of restricted and unrestricted equity instruments;... -
Philips’ application of current cost accounting until 1981
Item type: Journal Article • Journal: De Ratione • Authors: M A van Hoepen R.A. --- University of Stellenbosch, I J Lambrechts --- University of Stellenbosch, F J Mostert --- University of Stellenbosch,The N.V. Philips’ Gloeilampenfabrieken has been applying current cost accounting since 1951. In doing so, various systems were chosen over the years. The example of Philips can therefore be seen as an empirical illustration of a number of ways according... -
Philips’ application of current cost accounting since 1982
Item type: Journal Article • Journal: De Ratione • Authors: M A van Hoepen --- University of Stellenbosch, I J Lambrechts --- University of Stellenbosch, F J Mostert --- University of Stellenbosch,The N.V. Philips’ Gloeilampenfabrieken has applied current cost accounting since 1951, In doing so, various systems were chosen over the years. The example of Philips can therefore be seen as an empirical illustration of a number of ways according to... -
Key Information Technologies in the mid-1990s as Perceived by the Accounting Profession and Business Managers
Item type: Journal Article • Journal: De Ratione • Authors: Dan Remenyi --- University of the Witwatersrand, Frances Sutherland --- University of the Witwatersrand,As information technology is playing a bigger ro!e in all business, professional and government organisations than ever before, it has become increasingly important to be able to forecast the direction of the use of this technology. -
A review of renal protection strategies
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Erna Meyer --- Northland District Health Board, Whangarei Base Hospital, New ZealandGlobally, more than 10 million people are affected every year by acute kidney injury (AKI) and approximately 6% of hospital patients sustain some degree of kidney injury during their hospital event. Reducing perioperative kidney injury may significantly improve patient outcomes... -
Spatio-temporal variability of five surface water quality parameters in the Swartvlei estuarine lake system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IA Russell --- South African National Parks, South AfricaVariability of salinity, temperature, pH, dissolved oxygen and turbidity in the temporarily open/closed Swartvlei estuarine system, measured from 1991 to 2013, was investigated at various temporal (seasonal, estuarine open/closed phase, long-term) and spatial (inter- and intra-waterbody) scales. Longitudinal pH and... -
Influence of climate variables on Cyperus papyrus stomatal conductance in Lubigi wetland, Kampala, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Opio --- Department of Biology, Uganda MB Jones --- Department of Botany, Ireland F Kansiime --- Department of Environmental Management, Uganda T Otiti --- Department of Physics, UgandaCyperus papyrus forms highly productive wetlands in tropical Africa, but the environmental control of transpirational water loss in wetlands is poorly understood. The influence of climate variables on papyrus stomatal conductance in dry and wet seasons of the year was... -
Bacteria with industrial potential from Lake Nakuru, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EO Musikoyo --- Department of Biological Sciences, Kenya AW Muia --- Department of Biological Sciences, Kenya SO Oduor --- Department of Biological Sciences, KenyaBacteria with industrial potential in Lake Nakuru were isolated and characterised over six months in 2010. The enzymatic activities of 30 isolates towards various macromolecules were investigated by testing their ability to degrade starch, cellulose, casein and lipid substrates. Fifteen... -
Haemolymph parameter changes in the South African Mooi River crab Potamonautes warreni during prolonged starvation
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: WJ van Aardt --- Research Unit for Environmental Sciences and Management, South AfricaAnimals in the wild are constrained by food resources. To understand the severity of starvation events on their biology, starvation in all its manifestations must be documented. Male Potamonautes warreni Calman crabs were collected live from the Mooi River, near... -
The cosmological aspects of food in the material world
Item type: Journal Article • Journal: • Authors: Joseph Hegarty --- Sheffield Business School, Sheffield Hallam University, Sheffield, UKThere is a general tendency today to believe that all truth worth knowing is to be found in the various branches of the physical sciences. If this were so, there could be no place for a philosophy of matter, or by... -
A critical view on the soil fertility status of minimum-till kikuyu–ryegrass pastures in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Pieter A Swanepoel --- Department of Agronomy, South Africa Chris C du Preez --- Soil, Crop and Climate Sciences, South Africa Philip R Botha --- Research and Technology Development Services, Department of Agriculture Western Cape, South Africa Hennie A Snyman --- Animal, Wildlife and Grassland Sciences, South AfricaCultivated pastures provide increased productivity and contribute inter alia to food security. Rangelands in the southern Cape region of South Africa have had a low animal production potential and were therefore improved through time as cultivated pastures. Initially, annual pastures... -
A framework for caring in physiotherapy education and practice
Item type: Journal Article • Journal: South African Family Practice • Authors: Serela Ramklass --- School of Clinical Medicine, South AfricaBackground: Caring is central to the practice of physiotherapy. However, explicit components of caring required for South African physiotherapy practice within a model of primary healthcare are not detailed. -
The role of community health workers in the re-engineering of primary health care in rural Eastern Cape
Item type: Journal Article • Journal: South African Family Practice • Authors: Karl le Roux --- Zithulele Hospital, South Africa Ingrid M le Roux --- Philani Maternal, South Africa Nokwanele Mbewu --- Philani Maternal, South Africa Emily Davis --- Semel Institute and the Department of Psychiatry, USABackground: Primary Health Care in South Africa is being re-engineered to create a model of integrated care across different levels of the health care system. From hospitals to clinics, in the community and in the home, health care will focus... -
Lower urinary tract symptoms (LUTS) in males: a review of pathophysiology
Item type: Journal Article • Journal: South African Family Practice • Authors: Suhani Maharajh --- Department of Urology, South Africa Ehab H Abdel Goad --- Department of Urology, South Africa Serela S Ramklass --- School of Medicine, South Africa Marius C Conradie --- Netcare Waterfall City Hospital, South AfricaLower urinary tract symptoms (LUTS) refer to the symptom complex that is the common pathway for diseases affecting the lower urinary tract. It manifests as either irritative or obstructive symptoms. LUTS have long been recognised as a significant cause of... -
The truck driver's watch: time and the working lives of long haul truck drivers in southern Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Adriaan S. Steyn --- Department of Sociology and Social Anthropology, South AfricaThe optimal use of time has shaped the organisation of productive activity in capitalist societies. This objective has similarly shaped labour in the truck transport industry. Drawing on mobile ethnographic fieldwork conducted amongst long haul truck drivers in southern Africa,... -
The psychosocial well-being of a “forgotten” South African community: the case of Ndumo, KwaZulu-Natal
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Werner Nell --- Optentia Research Programme, Department of Behavioural Sciences, South Africa Engela de Crom --- Department of Nature Conservation, South Africa Hendri Coetzee --- Institutional Community Engagement Office and Unit for Environmental Sciences and Management, North-West University, South Africa Elize van Eeden --- Research Group for Integrative Multidisciplinary Ecohealth and Wellbeing Research, South AfricaThis study investigated the psychosocial well-being of an indigenous cultural community in South Africa, using a sequential explanatory mixed-methods design. Data on life satisfaction and emotional, social and psychological well-being were collected from 521 local residents (48% female) of Ndumo... -
Disaster recovery experiences of a South African rural farming community
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Christiaan Becker --- Africa Unit for Transdisciplinary Health Research, South Africa Vera Roos --- Africa Unit for Transdisciplinary Health Research, South Africa Hendri Coetzee --- Africa Unit for Transdisciplinary Health Research, South AfricaThis study explored the bush fire disaster experiences and coping of South African farmers. Participants consisted of seven male farmers (6 = White Afrikaans-speaking; 1 = Black Tswana-speaking). Data were collected using semi-structured interviews, nine months after the disaster, and analysed thematically. The findings... -
Reports of Kroyeria species collected from South African waters with notes on the host–parasite associations
Item type: Journal Article • Journal: African Zoology • Authors: Peter J Mokumo --- Department of Biodiversity, University of Limpopo, South Africa Susan M Dippenaar --- Department of Biodiversity, University of Limpopo, South AfricaThere are 21 species in the genus Kroyeria of which nine have been reported from hosts caught off South Africa. Host–parasite associations were reported for K. dispar, K. papillipes and K. sphyrnae. Kroyeria specimens were collected from the gill filaments... -
First Hemolivia from southern Africa: reassigning chelonian Haemogregarina parvula Dias, 1953 (Adeleorina: Haemogregarinidae) to Hemolivia (Adeleorina: Karyolysidae)
Item type: Journal Article • Journal: African Zoology • Authors: Courtney A Cook --- Unit for Environmental Sciences and Management, North-West University, South Africa Edward C Netherlands --- Unit for Environmental Sciences and Management, North-West University, South Africa Nico J Smit --- Unit for Environmental Sciences and Management, North-West University, South AfricaTo date, only a single species of Hemolivia, Hemolivia mauritanica (Sergent & Sergent, 1904), has been described from African terrestrial tortoises. Although various haemogregarines have been described from southern African terrapins and tortoises, including species from the genus Haemogregarina and... -
Anaesthesia for a patient with B-thalassaemia
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: I Giannakikou --- Department of Anaesthesia, Greece A Karra --- Department of Intensive Care Unit, GreeceΒ-Thalassaemia is a rare hereditary disease caused by partial or complete deficiency of β-haemoglobin chain synthesis. There is a lot of literature regarding anaesthetic management in other haemoglobinopathies (i.e. sickle cell disease), especially in the paediatric population, but there is... -
Habitual physical activity, peripheral neuropathy, foot deformities and lower limb function: characterising prevalence and interlinks in patients with type 2 diabetes mellitus
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: AF Adeniyi --- Department of Physiotherapy, Nigeria OS Aiyegbusi --- Department of Physiotherapy, Nigeria OO Ogwumike --- Department of Physiotherapy, Nigeria PO Adejumo --- Department of Nursing, Nigeria AA Fasanmade --- Department of Medicine, NigeriaBackground: Patients with type 2 diabetes mellitus (T2DM) may have diverse foot problems, but how these problems are linked with physical activity is not clear. This study investigated the prevalence of foot problems among patients with T2DM and investigated how... -
Successful treatment of cutaneous mucormycosis in a young diabetic with end-stage renal disease using combination systemic antifungal agents
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: A Korb --- Life Wilgeheuwel Hospital, South Africa PH Sonnekus --- Life Wilgeheuwel Hospital, South AfricaThis article reports successful eradication of isolated cutaneous mucormycosis in a young poorly controlled type 1 diabetic patient with end-stage renal disease using a combination of systemic antifungal agents and aggressive surgical debridement. -
Comparative study of double-chamber microbial fuel cells (DC-MFCs) using Mfensi clay as ion-exchange-partition: Effect of electrodes
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: R.Y. Tamakloe --- Department of Physics, Ghana T. Opoku-Donkor --- Department of Physics, Ghana M.K.E. Donkor --- Department of Physics, Ghana H. Agamasu --- Department of Physics, GhanaAn alternative answer to the vital issues of electricity production and wastewater treatment leads to the application of microbial fuel cells. This study has developed a low-cost double-chambered microbial fuel cell (MFC) for electricity generation, which can also be used... -
Sexual dimorphism based on body proportions and ontogenetic changes in the Brazilian electric ray Narcine brasiliensis (von Olfers, 1831) (Chondrichthyes: Narcinidae)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: FA Rolim --- Fisheries Institute of São Paulo, Brazil FP Caltabellotta --- Oceanography Department, Brazil MM Rotundo --- Zoological Collection of University of Santa Cecília – UNISANTA, Brazil T Vaske-Júnior --- Elasmobranch Laboratory, BrazilSexual dimorphism in the Brazilian electric ray Narcine brasiliensis from the south‑western Atlantic coast was evaluated based on body proportions and ontogenetic changes. All regions of the body were found to have differences in body proportions between the sexes, except... -
Redescription of Hydrolagus africanus (Gilchrist, 1922) (Chimaeriformes: Chimaeridae), with a review of southern African chimaeroids and a key to their identification
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KA Walovich --- Pacific Shark Research Center, USA DA Ebert --- Pacific Shark Research Center, USA DJ Long --- Department of Ichthyology, USA DA Didier --- Department of Biological Sciences, USAHydrolagus africanus (Gilchrist, 1922) is a little‑known chimaeroid species, originally described from the KwaZulu‑ Natal coast of South Africa, with a range spanning the western Indian Ocean from Kenya, south to Mozambique and South Africa, and extending into the south‑eastern... -
Incorporating stable isotopes into a multidisciplinary framework to improve data inference and their conservation and management application
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HM Christiansen --- Great Lakes Institute for Environmental Research, Canada AT Fisk --- Great Lakes Institute for Environmental Research, Canada NE Hussey --- Great Lakes Institute for Environmental Research, CanadaThrough its ability to address complex ecological questions and the possibility of analysing large sample sizes to understand population‑level processes, the use of stable isotope analysis (δ13C and δ15N) has grown rapidly in recent years. Importantly, it is now becoming... -
Adherence by a primary healthcare clinic in KwaZulu-Natal to the national HIV guidelines
Item type: Journal Article • Journal: South African Family Practice • Authors: Nnaemeka Uzodike --- Department of Family Medicine, South Africa Andrew Ross --- Department of Family Medicine, South Africa Ogbonnaya Harbor --- Department of Family Medicine, South AfricaBackground: The decentralisation of antiretroviral therapy (ART) to primary health care (PHC) was rolled-out in South Africa in March 2010. PHC staff members are expected to initiate ART, monitor patients, and detect and refer patients with adverse events or virological... -
A review of the radiological imaging modalities of non-traumatic small bowel obstruction
Item type: Journal Article • Journal: South African Family Practice • Authors: Narisha Maharaj --- Department of Radiology, South Africa Bhugwan Singh --- Department of Surgery, South AfricaSmall bowel obstruction is a common clinical presentation that presents a diagnostic conundrum. Over the last 2 decades, there has been a paradigm shift in the radiological investigation of small bowel obstruction (SBO) and in the indication for and timing... -
Caffeine versus aminophylline for the prevention of apnoea of prematurity in a teaching hospital in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Natalie Schellack --- Department of Paediatrics and Child Health, South Africa Andries GS Gous --- Department of Pharmacy, South Africa Patience B Mawela --- Department of Paediatrics and Child Health, South AfricaStudy objectives: To determine the safety and efficacy of the use of oral anhydrous caffeine and intravenous aminophylline in the neonatal population using therapeutic drug levels and clinical effects as markers for determination. -
HeartMath: a positive psychology paradigm for promoting psychophysiological and global coherence
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Stephen D Edwards --- Psychology Department, South AfricaThis article proposes HeartMath as a positive psychology paradigm for promoting psychophysiological and global coherence . It provides evidence for the value of psychophysiological and global coherence, with special reference to human functioning through synchronisation between positive emotions, cardiovascular, respiratory,... -
Silodosin — a safer alpha-blocker targeting benign prostatic hyperplasia
Item type: Journal Article • Journal: South African Family Practice • Authors: Karen Koch --- Private practice GP and freelance medical writer, South AfricaSilodosin is a specific alpha-1A receptor inhibitor newly available in South Africa. It offers a real solution to symptoms of BPH especially in those patients with moderate prostate enlargement experiencing nocturia, frequency and incomplete voiding. -
Remote clinical support by telephone for rural district hospital medical officers in the Eastern Cape
Item type: Journal Article • Journal: South African Family Practice • Authors: MO Nqala --- Department of Anaesthesia, South Africa CC Rout --- Department of Anaesthesia, South Africa CM Aldous --- Department of Anaesthesia, South AfricaBackground: Rural district hospitals are frequently understaffed and inexperienced medical officers must make clinical decisions with no supervision. Medical officers from rural district hospitals in the Eastern Cape attending a two-week ‘in-reach’ anaesthesia training course at the Port Elizabeth academic... -
The Effects of Phosphate Fertilizers and Manure on Maize Yields in South Western Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: J. S. Ademba --- Kenya Agricultural Research Institute (KARI) Kisii, Kenya J. K. Kwach --- Kenya Agricultural Research Institute (KARI) Kisii, Kenya A. O. Esilaba --- Kenya Agricultural Research Institute (KARI) Headquarters, Kenya S. M. Ngari --- Egerton University, KenyaPhosphorus, nitrogen and Striga hermonthica are the major constraints to maize production in the Nyanza Province of Kenya. Field trials were conducted on-farm in Nyanza Province to investigate the effects of phosphate fertilizers and manure on maize yields. The experimental... -
Comparison of biochemical compounds and antioxidant activities in date palm bunch fading disorder
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mahmood Izadi --- Department of Horticultural Science, College of Agriculture, Iran Ali Reza Shahsavar --- Department of Horticultural Science, College of Agriculture, IranDate palm bunch fading disorder, the cause of which remains unknown, is among the most harmful disorders affecting date production. In this study the contents of several biochemical compounds and antioxidant enzyme activity were measured in both faded and non-faded... -
Genetic variability in cowpea (Vigna unguiculata (L.) Walp.) genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Abe S Gerrano --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Patrick O Adebola --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Willem S Jansen van Rensburg --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Sunette M Laurie --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South AfricaInformation on genetic variability among the existing cowpea genotypes will increase the efficiency of the cowpea improvement. Field experiments were conducted at the Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute in South Africa, in 2011 and 2012, to estimate... -
Characteristics and management options of crusting soils in a smallholder farming area of the Zambezi metamorphic belt in northern Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Alen Manyevere --- University of Limpopo, South Africa Courage Bangira --- Chinhoyi University of Technology, Zimbabwe Jephita Gotosa --- Bindura University of Science Education, Zimbabwe Lawrence Munjonji --- University of Limpopo, South Africa Emmanuel Chikwari --- Chemistry and Soil Research, ZimbabweCrusting and surface-sealing soils present productivity challenges to smallholder farmers despite their high inherent fertility. Crop production on crusting soils is costly due to unfavourable conditions such as surface capping and compaction, which hinder crop emergence. A study was conducted... -
Aspects of tourism in Kenya
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: John Middleton --- Yale University, USATourism in Kenya dates back to the colonial era. Tourists have invented a map of Kenya that comprises mainly the Rift Valley and the Indian Ocean coast; and they divide the population into ‘noble’ pastoralists and less noble agriculturalists and... -
The Buysdorp conundrum: constructing and articulating community and identity in Soutpansberg, Limpopo Province
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Michael de Jongh --- Department of Anthropology and Archaeology,Coenraad de Buys, the great-grandson of Jean du Bois, a Huguenot immigrant from Calais, France, was by all accounts a formidable man. He left an indelible, often disruptive, mark on the historical, political and sociocultural landscape of South Africa. Coenraad... -
Women, difference and urbanisation patterns in Cape Town, South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Andrew Spiegel --- Department of Social Anthropology, South Africa Vanessa Watson --- Department of Social Anthropology, South Africa Peter Wilkinson --- Department of Social Anthropology, South AfricaA point apparently often lost to policy makers is that those for whom policy is designed have very diverse life experiences. The article focuses on two women's experiences of urbanisation: experiences that are extremely different from one another, despite the... -
Grief-stricken: Zimbabwean children in everyday extremity and the ethics of research
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Ross Parsons --- Dept. Anthropology, USAThe essay approaches ethics and research through a description of the beginnings of a study of children's lives under extreme adversity in the Manicaland province of contemporary Zimbabwe. An encounter with an orphaned child is described, highlighting the presence of... -
Socio-economic rights and anthropology? The case of Deaf people who use South African Sign Language (SASL) in a university setting
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Marion Heap --- Health and Human Rights Division,As a response to Van der Waal and Ward's (2006) invitation, this article suggests human rights, particularly socio-economic rights, as a conceptual framework to take forward anthropology in post-apartheid South Africa. Entrenchment of human rights in South Africa's Constitution marks... -
Medicine from the Father: Bossiesmedisyne, people, and landscape in Kannaland
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Joshua B. Cohen --- University of Cape Town, South AfricaIn the rural Western Cape local municipality of Kannaland, the word ‘bossiesmedisyne’ (lit. bushes medicine), refers to plant and sometimes animal material used to treat and alleviate a wide range of health problems, ranging from colds to cancer. Based on... -
New knowledge and the university
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Martin Hall --- Centre for Social Justice Research,What forms of knowledge have legitimacy in the contemporary university? By using Actor-Network Theory to unravel the strands in a recent dispute about access to skeletons from a burial ground in Cape Town, this paper shows how circulating systems of... -
Silencing the past: historical and archaeological colonisation of the Southern San in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Michael Francis --- Athabasca University, I University Drive, CanadaThe San of the Drakensberg are assumed to be extinct. Yet, there are Zulu-speaking people in the Drakensberg who still identify as San. These people and their claims both challenge the preconceived notions of what it means to be San... -
An exposé ethnography of Zimbabwe's internally displaced ex-farm workers: Practical and ethical dilemmas
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Andrew Hartnack --- Department of Anthropology,From 2000 onwards, Zimbabwe's often violent land invasions displaced at least 500 000 farm workers from white-owned commercial farms across the country. While studies subsequently conducted on the land invasions tended to focus on their impact on farm workers who... -
ICT4D and the Siyakhula Living Lab: an anthropological contribution to digital development
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Robin Palmer --- Rhodes University, South AfricaAnthropologists are increasingly interested in the reception and adaptation of Information and Communications Technologies (ICTs) at the local level, especially when these are intended or adapted for social change in the kinds of societies and communities anthropologists study. The process... -
Men, women, temporality and critical ethnography in Africa—the imperative for a transdisciplinary conversation
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Elaine Salo --- Institute for Women's and Gender Studies, University of Pretoria,This article addresses concerns of African-based scholars about how we can adequately represent the social heterogeneity and the rich diversity of African subjects. I argue that by prioritising Pan-Africanist solidarity, and in our search for African authenticity, we often represent... -
Is xenophobia racism?
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Kenneth Tafira --- Department of Anthropology, South AfricaThe outbreak of anti-immigrant violence in May 2008 in South Africa has prompted a set of theoretical questions and a reappraisal of theoretical suppositions. While the attacks have in the main pervasively been presented as xenophobia, I argue in this... -
Decency and exclusion: a symbolic interpretation of post-displacement discriminatory discourse in De Doorns, South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Nicola M. Hugo --- University of Stellenbosch, South AfricaFrom 14–17 November 2009 an estimated 3000 Zimbabweans were violently and forcefully displaced from their dwellings in a rural farming area, De Doorns, in the Western Cape, South Africa. This study looks into a discourse of decency to contribute, through... -
The Human Economy Project: first steps
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: John Sharp --- The Human Economy Project, Faculty of Humanities, South Africa Theodore Powers --- The Human Economy Project, Faculty of Humanities, South Africa Vito Laterza --- The Human Economy Project, Faculty of Humanities, South AfricaThe Human Economy Project is interdisciplinary in scope, but relies extensively on anthropological research methods. These methods are an appropriate counter to the methods adopted in mainstream economics, which has been criticised for its isolation from ‘the ordinary business of... -
On law and legality in post-apartheid South Africa: insights from a migrant street trader
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Jürgen Schraten --- The Human Economy Project, Faculty of Humanities, South AfricaThis article focuses on the experience of law and legality by a migrant street trader in post-apartheid South Africa. The experiences of this stall vendor are analysed alongside theoretical notions of law and the legal system. The ways that law... -
Biology, incidence and host susceptibility of Pineus boerneri (Hemiptera: Adelgidae) in Colombian pine plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos A Rodas --- Forestry Protection Programme, Colombia Rubén Serna --- Universidad Nacional de Medellín, Colombia Maria D Bolaños --- Forestry Protection Programme, Colombia Ginna M Granados --- Forestry Protection Programme, Colombia Michael J Wingfield --- Department of Zoology and Entomology, South Africa Brett P Hurley --- Department of Zoology and Entomology, South AfricaAdelgids (Hemiptera) in the genus Pineus have been reported as introduced insect pests causing serious losses to Pinus plantations worldwide. In 2008, Pineus boerneri was recorded for the first time in Colombia, with infestations noted on Pinus kesiya, P. tecunumanii,... -
Diseases on Eucalyptus species in Zimbabwean plantations and woodlots
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Luke Jimu --- Forest Science Postgraduate Programme, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Michael J Wingfield --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Eddie Mwenje --- Bindura University of Science Education, Zimbabwe Jolanda Roux --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South AfricaZimbabwe embarked on planting Eucalyptus species in the early 1900s. Based on a robust breeding programme, it has become a major source of seed for other countries in and outside Africa. Tree health surveys conducted on Eucalyptus in some east... -
Seasonal changes of nutrient levels and nutrient resorption in Avicennia marina leaves in Yingluo Bay, China
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Shudong Wei --- College of Life Sciences, China Xiaowei Liu --- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, China Lihua Zhang --- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, China Hui Chen --- College of Life Sciences, China Hui Zhang --- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, China Haichao Zhou --- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, China Yiming Lin --- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, ChinaAvicennia marina is a typical mangrove species of subtropical coastlines of China. However, little is known about the retention of nutrients by this species in oligotrophic, coastal environments. In this study, seasonal changes in nitrogen (N) and phosphorus (P) concentrations,... -
Egg morphology of Swift Terns in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Davide Gaglio --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Timothée R Cook --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Richard B Sherley --- Animal Demography Unit and Marine Research Institute, Department of Biological Sciences, South AfricaMorphology of Swift Tern Thalasseus bergii bergii eggs was examined on Robben Island, South Africa. A recently formed colony was found abandoned en masse, probably following human disturbance, and 146 freshly laid eggs were collected. The mean±SD nest density was... -
A survey for the Critically Endangered Liben Lark Heteromirafra archeri in Somaliland, north-western Somalia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Michael SL Mills --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Callan Cohen --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Julian Francis --- Tolpuddle Manor, UK Claire N Spottiswoode --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaThe Critically Endangered Archer's Lark (now Liben Lark) Heteromirafra archeri was formerly considered to be endemic to north-western Somalia and known only from the Tog Wajaale Plain, where 18 specimens were collected between 1918 and 1922. Fifteen visits between 1970... -
Long-distance dispersal capability of Lesser Flamingo Phoeniconaias minor between India and Africa: genetic inferences for future conservation plans
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: BM Parasharya --- AH India Network Project on Agricultural Ornithology, India DN Rank --- Department of Animal Genetics and Breeding, India David M Harper --- Department of Biology and Centre for Landscape and Climate Research, UK Giuseppe Crosa --- Department of Theoretical and Applied Sciences, Italy Serena Zaccara --- Department of Theoretical and Applied Sciences, Italy Nirmal Patel --- Department of Animal Genetics and Breeding, India CG Joshi --- Department of Animal Biotechnology, IndiaWe examine genetic differentiation of Lesser Flamingo Phoeniconaias minor, a colonial and vagrant waterbird confined to four populations in the Old World, in order to provide a first insight into geographic connections between the two major breeding populations. Sixty-nine flamingos,... -
A new subfossil bulbul (Aves: Passerines: Pycnonotidae) from Rodrigues Island, Mascarenes, south-western Indian Ocean
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Julian P Hume --- Bird Group, Department of Life Sciences, UKThe Hypsipetes bulbuls (Pycnonotidae) occur on Madagascar and oceanic islands throughout the Indian Ocean, as well as continental Asia. Endemic species are found on the Mascarene Islands of Mauritius and Réunion, but the genus was purportedly never reported from Rodrigues,... -
The mitochondrial cytochrome c oxidase I gene reveals phylogeographic structure in the African Goshawk Accipiter tachiro (Accipitridae)
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kurt Jordaens --- Joint Experimental Molecular Unit, Belgium Floris C Breman --- Joint Experimental Molecular Unit, Belgium Gontran Sonet --- Joint Experimental Molecular Unit, Belgium Zoltán T Nagy --- Joint Experimental Molecular Unit, Belgium Michel Louette --- Vertebrates Section, BelgiumWe used a 298 bp fragment of the mitochondrial cytochrome c oxidase subunit I gene (COI) to examine sequence variation in (mostly) museum specimens of the African Goshawk Accipiter tachiro. Our results showed two clades with high bootstrap support in a... -
Temporal changes in cranial size in South African vlei rats (Otomys): evidence for the ‘third universal response to warming’
Item type: Journal Article • Journal: African Zoology • Authors: Aluwani Nengovhela --- Department of Ecology and Resource Management, School of Environmental Sciences, South Africa Roderick M Baxter --- Department of Ecology and Resource Management, School of Environmental Sciences, South Africa Peter J Taylor --- South African Research Chair on Biodiversity Value and Change in the Vhembe Biosphere Reserve, School of Mathematics and Natural Sciences, South AfricaUsing museum collections and recently collected specimens we studied geographical and temporal (from 1906 to 2013) changes in skull size of two sibling species of rodents, Otomys auratus and O. angoniensis, in northern South Africa occupying distinct temperate grassland (O... -
Kelp gulls prey on the eyes of juvenile Cape fur seals in Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AJ Gallagher --- Leonard and Jayne Abess Center for Ecosystem Science and Policy, USA ER Staaterman --- Rosenstiel School of Marine and Atmospheric Sciences, USA N Dreyer --- Sandwich Harbour 4×4, NamibiaThe kelp gull Larus dominicanus is an abundant and highly successful avian predator and scavenger that breeds along the coastline in the Southern Hemisphere, ranging from Antarctica to the tropics. On account of its dietary breadth, wide-ranging foraging strategies, and... -
Characteristics and landcover of estuarine boundaries: implications for the delineation of the South African estuarine functional zone
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DA Veldkornet --- Department of Botany, South Africa JB Adams --- Department of Botany, South Africa L van Niekerk --- Department of Botany, South AfricaThis study investigated whether the current lateral boundary for estuaries in South Africa, i.e. the estuarine functional zone (EFZ), includes all estuarine habitats. The EFZ covers 173 930 ha in 304 estuaries/outlets nationally. Field surveys and analysis of available aerial... -
Gastric lavage as a non-lethal method for stingray (Myliobatiformes) diet sampling
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Elston --- South African Institute for Aquatic Biodiversity, South Africa RG von Brandis --- Save Our Seas Foundation, Seychelles PD Cowley --- South African Institute for Aquatic Biodiversity, South AfricaUnderstanding the trophic interactions of ecologically important mesopredators such as Myliobatiformes (stingrays) is vital, but, given their susceptibility to overexploitation, the collection of stomach contents for dietary analysis necessitates the use of non-lethal methods. We provide a detailed method of... -
A comparison of genetic structure in two low-dispersal crabs from the Wild Coast, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Y Qhaji --- Molecular Zoology Laboratory (Aquatic Division), Department of Zoology, South Africa B Jansen van Vuuren --- Molecular Zoology Laboratory (Aquatic Division), Department of Zoology, South Africa I Papadopoulos --- Molecular Zoology Laboratory (Aquatic Division), Department of Zoology, South Africa CD McQuaid --- Department of Zoology and Entomology, South Africa PR Teske --- Molecular Zoology Laboratory (Aquatic Division), Department of Zoology, South AfricaThe Wild Coast in south-eastern South Africa is strongly influenced by the warm, southward-flowing Agulhas Current. This current has a significant impact on dispersal in the coastal biota of the region, and facilitates high levels of connectivity among populations. However,... -
A computer-aided framework for subsurface identification of white shark pigment patterns
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Dureuil --- Department of Biology, Canada AV Towner --- Dyer Island Conservation Trust, South Africa LG Ciolfi --- Center for Marine Biology, Brazil LA Beck --- Department of Biology, GermanySubsurface video footage can be used as a successful identification tool for various marine organisms; however, processing of such information has proven challenging. This study tests the use of automated software to assist with photo-identification of the great white shark... -
Abundance and degree of residency of humpback dolphins Sousa plumbea in Mossel Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BS James --- Mammal Research Institute, South Africa MN Bester --- Mammal Research Institute, South Africa GS Penry --- Mammal Research Institute, South Africa E Gennari --- Oceans Research, South Africa SH Elwen --- Mammal Research Institute, South AfricaIndian Ocean humpback dolphins Sousa plumbea inhabit nearshore waters from South Africa to eastern India. Humpback dolphins are vulnerable to conservation threats due to their naturally small population sizes and use of nearshore habitats, where human activities are highest. We... -
Roald Dahl: A psychosexual developmental trajectory study illustrated within psychobiography
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Paul Fouché --- Department of Psychology, Faculty of the Humanities, South Africa Tania Holz --- Department of Psychology, Faculty of the Humanities, South AfricaThis study applies analytical psychobiography, particularly Freud's psychoanalytic apporoach, to the study of the psychosexual development of Roald Dahl (1916–1990), a renowned children's author, gentleman spy, connoisseur, and philanthropist of his time. Data sources for the analysis included primary and... -
The spiritual wellness of Beyers Naudé: A psychobiographical study of a South African anti-apartheid theologian
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Paul Fouché --- Department of Psychology, Faculty of Humanities, South Africa Barbara Burnell --- Department of Psychology, Faculty of Humanities, South Africa Roelf van Niekerk --- Department of Industrial and Organisational Psychology, South AfricaThe study explores and describes Beyers Naudé's (1915–2004) spiritual wellness across his lifespan. Naudé's life history was uncovered through the systematic collection and analyses of life history materials. Data were interpreted applying the Wheel of Wellness model (WoW) by Sweeney... -
Psychobiography in psychology: Past, present, and future
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Joseph G. Ponterotto --- Division of Psychological and Educational Services, USAThe present article reviews the history and emerging trends in the field of psychobiography. Five historical periods are highlighted: hagiography and pre-19th century study of lives; Freud and applied psychoanalysis; psychodynamic extensions and personology; modern multi-theoretical models; and psychobiography as... -
A psychobiographical analysis of Dambudzo Marechera's personal development through his writings
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Kudakwashe C Muchena --- School of Behavioural Sciences, South Africa Greg Howcroft --- School of Behavioural Sciences, South Africa Louise Stroud --- School of Behavioural Sciences, South AfricaThis study applied psychobiography to explore the personal development of Zimbabwean novelist Dambudzo Marechera – and particularly focus on psychological disintegration. For the evidence, we examined primary and secondary works on his life history with special attention to his literary... -
Hagiography: Current and prospective contributions
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Gregory Mitchell --- Department of Psychology, South Africa Greg Howcroft --- Department of Psychology, South AfricaThis study considers the historical development of hagiographic research, including its antecedents and contemporary motivations and intentions. As a sub-approach of psychobiographical research, hagiography's defining qualities include the venerability of the subject, the aim of edifying the reader and illustrating... -
Factors associated with self-rated health status among university students from 26 low, middle and high income countries
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- ASEAN Institute for Health Development, Thailand Karl Peltzer --- ASEAN Institute for Health Development, Thailand T. Alafia Samuels --- Faculty of Medical Sciences, Barbados Alexander Gasparishvili --- Lomonosov Moscow State University, RussiaThe aim of this study was to investigate self-reported health status and associated factors in low, middle and high income countries. Using anonymous questionnaires, data were collected in a cross-sectional survey from 19 811 undergraduate university students (mean age=20.8, SD=2.8)... -
The prevalence and associations of erectile dysfunction in a South African male diabetic urban population
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: T Kemp --- Faculty of Health Sciences, Department of Internal Medicine, South Africa P Rheeder --- Faculty of Health Sciences, Department of Internal Medicine, South AfricaBackground: Erectile dysfunction (ED) is a common condition in patients with type 1 or type 2 diabetes mellitus. The prevalence and predictors in our patient population are unknown since minimal data exist for this condition in South Africa. -
The Kenyan Consumer-Reader: Gender, Consumption, and Grace Ogot's Crisis of Authorship
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Ariel Bookman --- English Department,Grace Ogot has been lauded for advancing equality for African women in her writing. However her contributions to crucial debates about African authorship and readership have not yet been acknowledged. In her English-language fiction, Ogot addressed her readers as consumers,... -
Gestational trophoblastic disease: An overview
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: L C Snyman --- Gynaecologic Oncology Unit, Department of Obstetrics and Gynaecology, -
Case report of an intra-uterine pregnancy complicated by an ectopic invasive molar pregnancy
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: L C Snyman --- Gynaecological Oncology Unit, Department Obstetrics and Gynaecology, South AfricaWe report on a rare case of a woman presenting with an early intra-uterine pregnancy, lower abdominal pain and a right-sided pelvic mass. She developed an acute abdomen and an emergency laparotomy was performed. Histology revealed an ectopic invasive molar... -
Imaging in gynaecological oncology follow-up
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: B R Howard --- Department of Obstetrics and Gynaecology, Gynaecology Oncology Unit, R P Soeters --- Department of Obstetrics and Gynaecology, Gynaecology Oncology Unit,The early detection of a gynaecological cancer recurrence is important in order to institute early treatment. Numerous imaging techniques have been used to follow up patients after treatment of gynaecological malignancies. These include plain X-rays, ultrasound, CT scan, MRI scan... -
Pathology of gestational trophoblastic neoplasia: a review with recent insights
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: T Slavik --- Anatomical Pathologist, Ampath Pathology Laboratories, South AfricaGestational trophoblastic neoplasia (GTN) refers to a unique and heterogeneous group of conditions demonstrating differentiation towards various components of gestational trophoblast. Variants of hydatidiform mole (HM) are considered benign, whilst choriocarcinoma (CC), placental site trophoblastic tumour (PSTT) and the more... -
A metastatic unclassified trophoblastic tumour with spontaneous bilateral pneumothoraces
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: P Barnardt --- Department of Medical Imaging and Clinical Oncology, L Fourie --- Department of Medical Imaging and Clinical Oncology,Gestational trophoblastic disease (GTD) is a spectrum of diseases associated with pregnancy. Epithelioid trophoblastic tumour (ETT) is a rare neoplastic proliferation of the intermediate trophoblast that can be distinguished from choriocarcinoma. A 35-year-old female presented with persistent vaginal bleeding, raised... -
The role of sentinel lymph node biopsy in cervical cancer: an overview of the literature
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: T J De Greve --- Gynaecological Oncology Unit, Department of Obstetrics and Gynaecology, L C Snyman --- Gynaecological Oncology Unit, Department of Obstetrics and Gynaecology,Cervical cancer is the second most common cancer in southern African women. Although the FIGO staging does not include lymph node status, lymph node metastasis is an important risk factor for recurrence and death in patients with early cervical cancer... -
A case study on Rosai-Dorfman disease occurring within the pelvis
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: D J Babu --- Department of Gynaecology and Surgical Oncology, A Maheshwari --- Department of Gynaecology and Surgical Oncology, M Sengar --- Department of Hematology and Medical Oncology, S Menon --- Department of Pathology, Tata Cancer Hospital, India -
Pharmacological options for the protection of ovarian function in patients undergoing chemotherapy
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: MH Botha --- Unit for Gynaecological Oncology, Department of Obstetrics and Gynaecology, Faculty of Medicine and Health Sciences,Chemotherapy, particularly alkylating agents, can be toxic to germ cells, and may lead to treatment amenorrhoea in young women. The age at which chemotherapy is administered is a strong predictor of subsequent premature ovarian failure, with older patients being at... -
Epithelioid trophoblastic tumour: a report of two cases
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: MMA Elhassan --- Radiation Oncology Department, Sudan H-T Wu --- Department of Anatomical Pathology, AL Van Wijk --- Department of Radiation Oncology, -
A Patient from Limpopo province presenting with haematuria: what is the diagnosis?
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: Zaeem Ebrahim --- Department of Radiology, Kalafong Hospital, Nausheen Khan --- Department of Radiology, Kalafong Hospital, Farzanah Ismail --- Department of Radiology, Kalafong Hospital,We present a quiz-case of a 28-year-old female patient, from Limpopo province, who presented with haematuria, hepatosplenomegaly and caput medusae. Computed tomography (CT) imaging fndings are provided. The diagnosis is provided in the discussion below. -
Characterisation of staphylococcus aureus bacteraemia at Tygerberg hospital
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: H. Orth --- Division of Medical Microbiology, Department of Pathology, Stellenbosch University, Z.S. Dreyer --- Division of Medical Microbiology, Department of Pathology, Stellenbosch University, E. Makgotlho --- Institute of Hygiene and Microbiology, University of Würzburg, W. Oosthuysen --- Division of Medical Microbiology, Department of Pathology, B. Sinha --- Department of Medical Microbiology, University of Groningen, E. Wasserman --- Pathcare Laboratories,To elucidate the local epidemiology of Staphylococcus aureus bacteraemia, we characterised blood culture isolates using molecular methods and prospectively collected clinical data to determine the occurrence of community-acquired, methicillin-resistant S. aureus (MRSA). Consecutive S. aureus blood culture isolates were collected... -
Dog bites and human rabies in the Uthungulu District of Kwazulu-Natal province, 2008–2010: a review of surveillance data
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: V. Kubheka --- South African Field Epidemiology and Laboratory Training Programme, P. Govender --- Provincial Department of Health, B. Margot --- Provincial Department of Health, L.R. Kuonza --- South African Field Epidemiology and Laboratory Training Programme,The Uthungulu District in KwaZulu-Natal province is the area that is most affected by rabies in South Africa. Usually, the transmission of rabies to humans occurs through the bites of infected dogs. In 2008, Uthungulu commenced a programme to eliminate... -
Reality bites of spider bites: a case report and review of the local epidemiology
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: A. Visser --- Department of Medical Microbiology, H.F. Visser --- Eugene Marais Life Hospital, -
Phylogeny of Sindbis virus isolates from South Africa
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: N. Storm --- Department of Microbiology and Plant Pathology, Faculty of Natural and Agricultural Sciences, J. Weyer --- Department of Microbiology and Plant Pathology, Faculty of Natural and Agricultural Sciences, W. Markotter --- Department of Microbiology and Plant Pathology, Faculty of Natural and Agricultural Sciences, P.A. Leman --- Centre for Emerging and Zoonotic Diseases, A. Kemp --- Centre for Emerging and Zoonotic Diseases, L.H. Nel --- Department of Microbiology and Plant Pathology, Faculty of Natural and Agricultural Sciences, J.T. Paweska --- Department of Microbiology and Plant Pathology, Faculty of Natural and Agricultural Sciences,Sindbis virus (SINV), the prototype virus in the genus, Alphavirus, is an arbovirus with an extensive geographical distribution. Birds are the main vertebrate hosts for SINV, while Culex mosquitoes serve as vectors and occasionally transmit the virus to humans, causing... -
Ratification of rapid rotavirus diagnostic test strips
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: E M C Theron --- Department of Life and Consumer Sciences, M M Nyaga --- Diarrhoeal Pathogens Research Unit, University of Limpopo, Medunsa Campus; WHO Rotavirus Regional Reference Laboratory, J B Dewar --- Department of Life and Consumer Sciences,The World Health Organization and Centers for Disease Control and Prevention estimate that rotavirus-associated gastroenteritis is the third most common cause of death in young children, with approximately 453 000 deaths annually, and that more than 90% of these deaths... -
Preventive therapy for children following contact with a tuberculosis source case: cause for debate in a high-burden setting?
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: J A Seddon --- Desmond Tutu TB Centre, Department of Paediatrics and Child Health, South Africa P. Godfrey-Faussett --- Department of Clinical Research, United Kingdom A C Hesseling --- Desmond Tutu TB Centre, Department of Paediatrics and Child Health, South Africa H S Schaaf --- Desmond Tutu TB Centre, Department of Paediatrics and Child Health, South Africa D A Enarson --- Desmond Tutu TB Centre, Department of Paediatrics and Child Health, South AfricaThe identifcation of vulnerable children following contact with an infectious tuberculosis source case, and their subsequent treatment with effective preventive therapy, reduces the risk of tuberculosis disease progression. The majority of countries in the world recommend preventive therapy for young... -
High prevalence of mupirocin resistance associated with resistance to other antimicrobial agents in Staphylococcus aureus isolated from patients in private health care, Western Cape
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: E. Wasserman --- , H. Orth M. Senekal K. HarveyStaphylococcus aureus is an opportunistic pathogen which results in high morbidity and mortality. Decolonisation of the carriers by the intranasal administration of mupirocin is frequently prescribed in infection control practice. The aim of this study was to establish the prevalence... -
A pilot study on the use of amikacin in neonates: Who should be monitored for ototoxicity?
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Deirdré Engler --- Department of Pharmacy, South Africa Natalie Schellack --- Department of Pharmacy, South Africa Alida Naude --- Discipline of Speech- Language Pathology and Audiology, South Africa Andries Gous --- Department of Pharmacy, South AfricaBackground: Aminoglycosides (AGs) cause irreversible hearing loss. The toxic effects of AGs are dose dependent and correlate with increasing drug serum concentrations. -
A multi-centre, phase IV study to evaluate the steady-state plasma concentration and serum bactericidal activity of a generic teicoplanin preparation
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Oppel Greeff --- Department of Pharmacology, School of Medicine, Faculty of Health Sciences, South Africa Jacob van Tonder --- Department of Pharmacology, School of Medicine, Faculty of Health Sciences, South Africa Duncan Cromarty --- Department of Pharmacology, School of Medicine, Faculty of Health Sciences, South Africa Warren Lowman --- Department of Clinical Microbiology and Infectious Diseases, School of Pathology, South Africa Piet Becker --- Faculty of Health Sciences, South Africa Margo Nell --- Department of Pharmacology, School of Medicine, Faculty of Health Sciences, South AfricaIntroduction: Teicoplanin is an effective treatment option against methicillin-resistant, Gram-positive bacteria, like Staphylococcus aureus. It is a glycopeptide antibiotic, produced through microbial fermentation, a process resulting in variations in the N-acyl side chain. Concerns that these variations may affect the... -
Discrepancies in the identification of methicillin-resistant Staphylococcus aureus and the absence of mecC in surveillance isolates in South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Ashika Singh-Moodley --- Center for Opportunistic, Tropical and Hospital Infections, National Institute for Communicable Diseases, a Division of the National Health Laboratory Service, South Africa Else Marais --- Center for Opportunistic, Tropical and Hospital Infections, National Institute for Communicable Diseases, a Division of the National Health Laboratory Service, South Africa Olga Perovic --- Center for Opportunistic, Tropical and Hospital Infections, National Institute for Communicable Diseases, a Division of the National Health Laboratory Service, South AfricaWe investigated instances of phenotypic and genotypic discrepancies in the identification of methicillin-resistant Staphylococcus aureus in a reference laboratory in South Africa. Organism identification and antimicrobial susceptibility testing were performed using automated systems; and, the detection of mecA, mecC and... -
The Behaviour and Brain Function of the Cichlid Fish Hemihaplochromis Philander
Item type: Journal Article • Journal: Zoologica Africana • Authors: A.J. Ribbink --- Department of Zoology and Entomology,Forebrain extirpations from Hemihaplochromis philander (Pisces: Cichlidae) resulted in a decrease of aggressive (territorial), courtship, and spontaneous behaviour. The stimulus-response latency was found to be increased by the extirpations. Forebrainless males were unable to distinguish between male and female conspecifics... -
The reproductive biology of an open-water spawning Lake Malawi cichlid, Copadichromis chrysonotus
Item type: Journal Article • Journal: African Zoology • Authors: Lance W. Smith --- Research Officer, MalawiCopadichromis chrysonotus is a zooplanktivorous cichlid member of the diverse fish community inhabiting Lake Malawi’s rocky, littoral habitat. Like most Lake Malawi cichlids, this species’ reproductive strategy is based on maternal mouthbrooding, but it is the only littoral species known... -
The terrestrial invertebrate fauna of a temporary stream in southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: M.J. Wishart --- Freshwater Research Unit, Zoology Department, South AfricaThe terrestrial invertebrate fauna of an intermittent stream was examined in the absence of surface flows within the context of the flood pulse concept. Terrestrial invertebrates were collected from three sites on the Kruis River in theWestern Cape Province, South... -
Geographic variation in sexual size dimorphism in the rock agama, Agama atra (Sauria: Agamidae)
Item type: Journal Article • Journal: African Zoology • Authors: A.F. Flemming --- National Museum, South Africa P. le F.N. Mouton --- Department of Zoology, South AfricaSignificant sexual dimorphism in overall size occurs in the rock agama, Agama atra (Sauria; Agamidae), with males growing larger than females. Geographic variation in the degree of sexual size dimorphism also exists, males growing significantly larger than females in Namaqualand... -
A new species of Heterixalus (Amphibia: Hyperoliidae) from western Madagascar
Item type: Journal Article • Journal: African Zoology • Authors: Miguel Vences --- Zoologisches Forschungsinstitut und Museum A. Koenig, Germany Frank Glaw --- Acquario di Genova, Italy Riccardo Jesu --- Acquario di Genova, Area Porto Antico, Italy Giovanni Schimmenti --- Acquario di Genova, Area Porto Antico, ItalyA new species of hyperoliid frog, Heterixalus carbonei n.sp., is described from the Antsingy forest inwestern Madagascar. It is characterized by an advertisement call consisting of long and regular note series. The only other Heterixalus with a similar call structure,... -
Sexual size dimorphism in the lizard Oplurus cuvieri cuvieri (Squamata, Opluridae) from Madagascar
Item type: Journal Article • Journal: African Zoology • Authors: Herilala J.A.R Randriamahazo --- Department of Zoology, JapanSexual size dimorphism in the medium-sized lizard Oplurus cuvieri cuvieri, which is endemic to the dry deciduous forest of Madagascar, is presented. Adults are sexually dimorphic in body size, head size, and tail length. Males have a greater snout–vent length... -
Changes in the abundance of cells in the anterior pituitary gland and the possible roles of luteinizing hormone, prolactin and progesterone in the control of delayed implantation in the straw-coloured fruit bat (Eidolon helvum)
Item type: Journal Article • Journal: African Zoology • Authors: J.A. Simbauni --- Kenyatta University, Kenya R.T.F. Bernard --- Department of Zoology & Entomology, South AfricaEidolon helvum (Megachiroptera) is a large frugivorous bat found in equatorial and tropical Africa. The reproductive cycle is characterized by a three-month period of delayed implantation and the total length of pregnancy may be as much as 10 months. A... -
Cercariae shed by Bulinus tropicus (Krauss, 1848) in the Free State, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: P.H. King --- Department of Biology, South Africa J.G. van As --- Department of Zoology and Entomology, South AfricaThe present study forms part of a survey of the snail-borne trematode parasites in the Free State Province, South Africa. The planorbid mollusc Bulinus tropicus (Krauss, 1848) is the most abundant and widespread freshwater snail in this area. Parasitological studies... -
Calls of three species of arthroleptid frogs from Río Muni, Equatorial Guinea
Item type: Journal Article • Journal: African Zoology • Authors: Ignacio De la Riva --- Museo Nacional de Ciencias Naturales, Spain Jaime Bosch --- Museo Nacional de Ciencias Naturales, Spain Rafael Márquez --- Museo Nacional de Ciencias Naturales, SpainThe calls of three anuran species in the family Arthroleptidae in the sub-family Astylosterminae from Equatorial Guinea are described including information on calling behaviour. For each species, we present a characteristic audiospectrogram and oscillogram. We also provide numerical information about... -
Studies on African zygaenoid moths (Lepidoptera: Zygaenoidea): adult morphology of Psycharium montanum (Somabrachyidae)
Item type: Journal Article • Journal: African Zoology • Authors: H. Geertsema --- Department of Entomology and Nematology, South AfricaThe morphology of the adult male of Psycharium montanum is described and illustrated to serve as a basis for subsequent taxonomic and systematic studies on African flannel moths and related taxa. P. montanum exhibits features showing closer affinity to Limacodidae... -
Killer whales (Orcinus orca) at Marion Island, Southern Ocean
Item type: Journal Article • Journal: African Zoology • Authors: M. Keith --- Mammal Research Institute, University of Pretoria, South Africa M.N. Bester --- Mammal Research Institute, University of Pretoria, South Africa P.A. Bartlett --- Mammal Research Institute, University of Pretoria, South Africa D. Baker --- Mammal Research Institute, University of Pretoria, South AfricaKiller whales (Orcinus orca) were studied using data obtained on an opportunistic basis between 1973 and 1996 at Marion Island (46°54’S, 37°45’E) in the Southern Indian Ocean. A clear seasonal pattern of occurrence with the main peak between October and... -
Taste buds in the palatal mucosa of snakes
Item type: Journal Article • Journal: African Zoology • Authors: Herman Berkhoudt --- Evolutionary Morphology, The Netherlands Perrin Wilson --- Department of Biology, U.S.A Bruce Young --- Department of Biology, U.S.AAn examination of the oral mucosa of Crotalus and several Scolecophidia revealed the presence of taste buds. The taste buds in these two divergent groups of snakes are similar in appearance, and correspond to previous descriptions of gustatory organs in... -
The inshore benthic macroinvertebrates of Lake Nabugabo, Uganda: seasonal and spatial patterns
Item type: Journal Article • Journal: African Zoology • Authors: J. Efitre --- Zoology Department, Uganda L.J. Chapman --- Department of Zoology, U.S.A. B. Makanga --- Zoology Department, UgandaLake Nabugabo, Uganda, is a lake of particular interest because of the unusual nature of its benthic macroinvertebrate community. In this study we quantified the spatial and temporal distribution of benthic macroinvertebrates within the lakewith a focus on habitat associations... -
Geographical distribution and habitats of the freshwater snail Bulinus reticulatus and its susceptibility to Schistosoma haematobium miracidia under experimental conditions
Item type: Journal Article • Journal: African Zoology • Authors: Kenné N. de Kock [AN0001] Corrie T. Wolmarans --- School of Environmental Sciences and Development, Zoology, South Africa Hylton D. Strauss --- School of Environmental Sciences and Development, Zoology, South Africa Madeleine Killian --- School of Environmental Sciences and Development, Zoology, South Africa Desireé C. Maree --- School of Environmental Sciences and Development, Zoology, South AfricaA brief account is given of the geographical distribution and habitats of Bulinus reticulatus as reflected by the 278 samples currently on record in the database of the National Freshwater Snail Collection, Potchefstroom University. The susceptibility of field specimens and... -
Estimation of the lion (Panthera leo) population in the southwestern Kgalagadi Transfrontier Park using a capture–recapture survey
Item type: Journal Article • Journal: African Zoology • Authors: J.G. Castley --- Conservation Services, South African National Parks, South Africa M.H. Knight --- Conservation Services, South African National Parks, South Africa M.G.L. Mills --- Conservation Services, South African National Parks, Endangered Wildlife Trust, and Mammal Research Institute, University of Pretoria, South Africa C. Thouless --- Department of Wildlife and National Parks, BotswanaA previous estimate of the lion (Panthera leo) population in the southwestern Kgalagadi Transfrontier Park (KTP) was made over 20 years ago. This together with increased fears regarding the viability of the population as a result of recent killings of... -
Juvenile survival and population regulation in southern elephant seals at Marion Island
Item type: Journal Article • Journal: African Zoology • Authors: P.A. Pistorius --- Mammal Research Institute, South Africa M.N. Bester --- Mammal Research Institute, South AfricaWe examined annual juvenile survival in southern elephant seals (Mirounga leonina) at Marion Island for the period 1994–1999 during which time the population was stable. Using mark–recapture models, we tested for age- and sex-specific differences in survival rates over the... -
Helminths of four species of gekkonid lizards from southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Stephen R. Goldberg --- Department of Biology, U.S.A. Charles R. Bursey --- Department of Biology, U.S.A.One hundred and seven specimens of four species of gekkonid lizards from southern Africa, Chondrodactylus angulifer, Pachydactylus bibronii, Pachydactylus capensis and Ptenopus garrulus, were examined for helminths. One species of cestode, Oochoristica ubelakeri, an undetermined cyclophyllid metacestode, six species of... -
Patterns of genetic heterogeneity in Neutraclinostomum intermedialis (Digenea: Clinostomatidae): geographical and temporal considerations
Item type: Journal Article • Journal: African Zoology • Authors: J.P Grobler [AN0001] N.M. Mokgalong --- School of Molecular and Life Sciences, South AfricaApproximately 300 individuals of Neutraclinostomum intermedialis from three localities in the Northern Province of South Africa were screened using allozyme electrophoresis. The aim was to determine genetic diversity and divergence within and between populations. The within population heterozygosity values (H... -
A new species of Eilica (Araneae: Gnaphosidae)
Item type: Journal Article • Journal: African Zoology • Authors: Moira J. FitzPatrick --- Natural History Museum, zimbabweEilica lotzi, a new species collected in Bloemfontein, South Africa, is described. This brings to four the number of species known from Africa. -
Oxygen dissociation curves of whole blood from the Egyptian free-tailed bat, Tadarida aegyptiaca E. Geoffroy, using a thin-layer optical cell
Item type: Journal Article • Journal: African Zoology • Authors: W.J. van Aardt --- School of Environmental Sciences and Development, South Africa G.N. Bronner --- Department of Zoology, South Africa Marie-Louise de Necker --- School of Environmental Sciences and Development, South AfricaTadarida aegyptiaca (mean body mass 13.5 g) is a fast flying insectivorous bat that hunts in open areas for extended periods, covering extensive distances during its foraging bouts. Whole blood samples taken from the wing arteries were analysed for 2,3-diphosphoglyceric... -
Helminths of seven species of lacertid lizards from southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Stephen R. Goldberg --- Department of Biology, Whittier College, U.S.A Charles R. Bursey --- Department of Biology, Pennsylvania State University, U.S.ATwo hundred and forty five lacertid lizards representing seven species (Heliobolus lugubris, Ichnotropis squamulosa, Meroles anchietae, M. cuneirostris, M. suborbitalis, Pedioplanis lineoocellata, P. namaquensis) from southern Africa were examined for helminths. Adults of one species of cestode, Oochoristica ubelakeri, and... -
Phylogenetic relationships among members of the Pachydactylus capensis group of southern African geckos
Item type: Journal Article • Journal: African Zoology • Authors: Aaron M. Bauer --- Department of Biology, U.S.A. Trip Lamb --- Department of Biology, U.S.A.Phylogenetic relationships among members of the Pachydactylus capensis group of southern African geckos -
Paternity in the Addo elephant population, South Africa. Is a single male monopolizing matings?
Item type: Journal Article • Journal: African Zoology • Authors: Anna M. Whitehouse --- Terrestrial Ecology Research Unit, Department of Zoology, South Africa Eric H. Harley --- Department of Chemical Pathology, South AfricaThe hypothesis that a single dominant male (GAA) monopolized all matings within the elephant population of South Africa’s Addo Elephant National Park between 1982 and 1996 was tested using microsatellite analysis. In addition, behavioural data on male musth periods, female... -
Molecular and bioacoustic divergence in Mantidactylus granulatus and M. zavona n.sp. (Anura: Mantellidae): bearings for the biogeography of northern Madagascar
Item type: Journal Article • Journal: African Zoology • Authors: Miguel Vences --- Institute for Biodiversity and Ecosystem Dynamics, Netherlands Franco Andreone --- Museo Regionale di Scienze Naturali, Sezione di Zoologia, Italy Frank Glaw --- Zoologische Staatssammlung, Germany Jasmin E. Randrianirina --- Parc Botanique et Zoologique de Tsimbazaza, MadagascarWe analysed the genetic and bioacoustic variability in Mantidactylus granulatus, a semi arboreal frog species endemic to the northern portion of Madagascar. Advertisement calls had a longer note duration in northeastern as compared to northwestern populations. Specimens from mid altitudes... -
Structure and cytology of the testes of Labeo victorianus (Pisces: Cyprinidae)
Item type: Journal Article • Journal: African Zoology • Authors: Justus Rutaisire --- Department of Wildlife and Animal Resources Management, Uganda Ruth T. Muwazi --- Department of Wildlife and Animal Resources Management, Uganda Anthony J. Booth --- Department of Ichthyology and Fisheries Science, South AfricaTestes macromorphology and histomorphology together with sperm cytology are described for a potamodrometic cyprinid fish, Labeo victorianus, from Lake Victoria. Testes were found to be paired and elongate, suspended by a mesorchium on either side of the swim bladder. A... -
Additional morphological information on two species of Caligus (Copepoda: Caligidae) parasitic on South African marine and estuarine fish
Item type: Journal Article • Journal: African Zoology • Authors: N.J. Grobler --- Department of Zoology and Entomology, South Africa J.G. Van As --- Department of Zoology and Entomology, South Africa P.A.S. Olivier --- School of Molecular and Life Sciences, South AfricaTwo species of Caligus that are parasitic on fish were collected from Lake St Lucia, South Africa. -
Trial by fire: social spider colony demographics in periodically burned grassland
Item type: Journal Article • Journal: African Zoology • Authors: Yael Lubin --- Mitrani Department of Desert Ecology, Israel Tanza Crouch --- Durban Natural Science Museum, South AfricaNature conservation authorities in southern Africa burn the grassland in nature reserves to reduce the incursion of woody plants and to encourage the growth of new grass for grazing. Studies have shown significant negative effects of burning on the abundance,... -
Distribution of veld rat sibling species Aethomys chrysophilus and Aethomys ineptus (Rodentia: Muridae) in southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: A.V. Linzey --- Department of Biology, U.S.A. M.H. Kesner --- Department of Biology, U.S.A. C.T. Chimimba --- Department of Zoology and Entomology, South Africa C. Newbery --- Kgaswane Mountain Reserve, South AfricaSibling species Aethomys chrysophilus (de Winton) and Aethomys ineptus Thomas and Wroughton are indistinguishable in external morphology. Although their combined geographic range extends over a large area of southern Africa, their respective distributions are uncertain. We have assembled a database... -
Species richness, endemicity and distribution patterns of South African sea anemones (Cnidaria: Actiniaria & Corallimorpharia)
Item type: Journal Article • Journal: African Zoology • Authors: Fabian H. Acuña --- Departamento de Ciencias Marinas, Argentina Charles L. Griffiths --- Marine Biology Research Institute, South AfricaA revised and updated list of South African sea anemones is compiled and the distribution pattern and endemicity of each determined from museum and literature records. Forty nine valid species are recognized. Species richness appears fairly uniform around the coast,... -
Distribution and status of the hippopotamids in the Ivory Coast
Item type: Journal Article • Journal: African Zoology • Authors: Harald H. Roth --- , Zimbabwe Bernd Hoppe-Dominik --- , Germany Michael Mühlenberg --- v. Siebold Str. 2, Zentrum för Naturschutz der Universität Güttingen, Germany Bernd Steinhauer-Burkart --- , Germany Frauke Fischer --- , GermanyThe distribution and relative abundance of the common hippo (Hippopotamus amphibius) and the pygmy hippo (Hexaprotodon liberiensis) was studied in the Ivory Coast between 1978 and 1986 by questionnaire survey, interviews, local field investigations and aerial censuses. In addition, the... -
Additional morphological information on Oculotrema hippopotami Stunkard, 1924 (Monogenea: Polystomatidae) parasitic on the African hippopotamus
Item type: Journal Article • Journal: African Zoology • Authors: Louis H. du Preez --- School of Environmental Sciences and Development, South Africa Itumeleng A. Moeng --- Department of Zoology and Entomology, South AfricaOculotrema hippopotami Stunkard, 1924, is the only monogenean known from a homoiotherm host, namely the African hippopotamus (Hippopotamus amphibius Linnaeus, 1758). The original description was based on five shrunken, unflattened specimens. Initially O. hippopotami was not widely accepted as a... -
The distribution of two medically and agriculturally important cryptic rodent species, Mastomys natalensis and M. coucha (Rodentia: Muridae) in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: F.P. Venturi --- Department of Zoology and Entomology, South Africa C.T. Chimimba --- Department of Zoology and Entomology, South Africa R.J. van Aarde --- Department of Zoology and Entomology, South Africa N. Fairall --- Department of Zoology and Entomology, South AfricaThe medically and agriculturally important Natal multimammate mouse, Mastomys natalensis (A. Smith, 1834) and the multimammate mouse, M. coucha (A. Smith, 1836), are sibling species and cannot easily be distinguished morphologically. As a consequence, their respective distributional ranges across South... -
Two new species of ptyctimous mites (Acari: Oribatida) from Ghana
Item type: Journal Article • Journal: African Zoology • Authors: Wojciech Niedbala --- Department of Animal Taxonomy and Ecology, PolandTwelve species of ptyctimous mites (Acari: Oribatida) are recorded from Ghana for the first time. Two new species are described and illustrated: Phthiracarus bicarinatus sp. nov. and Austrophthiracarus lacunosus sp. nov. Three species are recorded from West Africa for the... -
Sexual dimorphism in the African legless skink subfamily Acontiinae (Reptilia: Scincidae)
Item type: Journal Article • Journal: African Zoology • Authors: N.J.L. Heideman --- Department of Zoology and Entomology, South Africa S.R. Daniels --- Department of Botany and Zoology, South Africa P.L. Mashinini --- Department of Zoology and Entomology, South Africa M.E. Mokone --- Department of Zoology and Entomology, South Africa M.L. Thibedi --- Department of Zoology and Entomology, South Africa M.G.J. Hendricke --- Department of Biodiversity and Conservation Biology, South Africa B.A. Wilson --- Western Cape Education Department, South Africa R.M. Douglas --- National Museum, South AfricaThe extent to which sexual dimorphism in snout–vent length, tail length and head shape (length, width and height) manifests itself in the legless fossorial skink subfamily Acontiinae was investigated in representatives of all four of its genera, Acontias, Microacontias, Acontophiops... -
Symbionts of comatulid crinoids in False Bay, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Tessa N. Hempson --- Marine Biology Research Centre and Department of Zoology, South Africa Charles L. Griffiths --- Marine Biology Research Centre and Department of Zoology, South AfricaThis study documents the fauna associated with two common comatulid crinoid species, Comanthus wahlbergi and Tropiometra carinata, in False Bay, South Africa, and describes the patterns of infestation of obligate associate species. A total of 11 invertebrate species was found... -
Reproductive seasonality of southern African inshore and estuarine invertebrates – a biogeographic review
Item type: Journal Article • Journal: African Zoology • Authors: Alan N. Hodgson --- Department of Zoology and Entomology, South AfricaA literature review reveals that reproductive seasonality of less than 1% of South Africa’s inshore marine invertebrates has been studied. Approximately 95% of studies have been on large, long-lived, gonochoristic, iteroparous species, and nearly 50% on molluscs. There is only... -
Diversification of prey capture techniques among the piscivores in Lake Tana’s (Ethiopia) Labeobarbus species flock (Cyprinidae)
Item type: Journal Article • Journal: African Zoology • Authors: Martin de Graaf --- Experimental Zoology Group, Wageningen, the Netherlands Gerco H. van de Weerd --- Experimental Zoology Group, Wageningen, the Netherlands Jan W.M. Osse --- Experimental Zoology Group, Wageningen, the Netherlands Ferdinand A. Sibbing --- Experimental Zoology Group, Wageningen, the NetherlandsLake Tana harbours the only known intact species flock of large cyprinid fishes (15 Labeobarbus spp.). One of the most curious aspects of this species flock is the large number (8) of piscivorous species. Cyprinids are not well designed for... -
Larval fish dynamics in the Nxaxo-Ngqusi Estuary Complex in the warm temperate–subtropical transition zone of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: R.J. Wasserman --- Department of Zoology, U.S.A N.A. Strydom --- Department of Zoology, U.S.A T.H. Wooldridge --- Department of Zoology, U.S.AThe larval fish assemblage was investigated in the permanently open Nxaxo-Ngqusi Estuary Complex, situated in the subtropical–warm temperate biogeographic boundary zone of South Africa. Larval and early juvenile fishes were collected in summer and winter of 2007 and 2008 using... -
Near-shore distribution of Heaviside’s (Cephalorhynchus heavisidii) and dusky dolphins (Lagenorhynchus obscurus) at the southern limit of their range in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: S.H. Elwen --- Mammal Research Institute, University of Pretoria, South Africa M. Thornton --- Mammal Research Institute, University of Pretoria, 0001 Pretoria c/o Iziko South African Museum, South Africa D. Reeb --- Mammal Research Institute, University of Pretoria, South Africa P.B. Best --- Mammal Research Institute, University of Pretoria, 0001 Pretoria c/o Iziko South African Museum, South AfricaPhoto-identification surveys over three years along 390 km of coastline north of Cape Town, revealed that Heaviside’s dolphin distribution was consistent between years and higher in areas more exposed to swells and with greater long-term availability of small hake Merluccius... -
A preliminary molecular phylogeny of the Namib Desert darkling beetles (Tenebrionidae)
Item type: Journal Article • Journal: African Zoology • Authors: J. Steckel --- Department of Ecology, Germany M.L. Penrith --- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, South Africa J. Henschel --- Gobabeb Training and Research Centre, Namibia R. Brandl --- Department of Ecology, Germany J. Meyer --- Department of Ecology, GermanyA systematic classification of Namib Desert darkling beetles (Coleoptera: Tenebrionidae) based on morphological characters is complicated as strong selection pressures exerted by desert conditions have led to a suite of convergent morphological characteristics. Here we present a first and preliminary... -
What do myrmecophagous geckos eat when ants are not available?: comparative diets of three Socotran species
Item type: Journal Article • Journal: African Zoology • Authors: Miguel A. Carretero --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Portugal Pietro Lo Cascio --- Associazione ‘Nesos’,, ItalyThe diet of three populations of semaphore geckos (Pristurus) from Socotra archipelago is analysed based on 82 faecal pellets. Pristurus samhaensis from the small islands of Samha (n = 18) and Darsa (n = 24) and P. sokotranus from the... -
Genetic variation across Tunisian populations of the anuran species Discoglossus pictus and Pelophylax saharicus
Item type: Journal Article • Journal: African Zoology • Authors: Nabil Amor --- Research Unit: Genetics, Biodiversity and Bio Resources Development, Biotechnology Institute of Monastir, Tunisia Guillermo Velo-Antón --- Department of Ecology and Evolutionary Biology, U.S.A Sarra Farjallah --- Research Unit: Genetics, Biodiversity and Bio Resources Development, Biotechnology Institute of Monastir, Tunisia Khaled Said --- Research Unit: Genetics, Biodiversity and Bio Resources Development, Biotechnology Institute of Monastir, TunisiaThe intraspecific variation of mitochondrial cytochrome b sequence was analysed for two widely distributed Tunisian anuran species, Discoglossus pictus and Pelophylax saharicus. We observed low genetic variation within both species (D. p. auritus 0.6% uncorrected genetic distances, P. saharicus 0.2%)... -
Goose barnacles on seals and a penguin at Gough Island
Item type: Journal Article • Journal: African Zoology • Authors: Ryan R. Reisinger --- Mammal Research Institute, Department of Zoology and Entomology, South Africa Marthán N. Bester --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaDuring a survey of seals in September and October 2009 at Gough Island, South Atlantic Ocean, we recorded goose barnacles (Lepas australis) attached to the pelage of two of the 12 elephant seals (Mirounga leonina) inspected and one of the... -
Vagrant Subantarctic fur seal on the coast of Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: G.J. Greg Hofmeyr --- Port Elizabeth Museum at Bayworld, South Africa Omar A. Amir --- Institute of Marine Sciences, TanzaniaAn immature Subantarctic fur seal was sighted on Unguja Island, Zanzibar, Tanzania, in 2008. This is the most northerly record of a vagrant of this species. The nearest breeding colony is on the Prince Edward Islands, 4500 km distant. While... -
The phylogenetic affinities of Trachylepis sulcata nigra and the intraspecific evolution of coastal melanism in the western rock skink
Item type: Journal Article • Journal: African Zoology • Authors: Daniel M. Portik --- Department of Biology, U.S.A. Aaron M. Bauer --- Department of Biology, U.S.A. Todd R. Jackman --- Department of Biology, U.S.A.The phylogenetic affinities of the melanistic subspecies Trachylepis sulcata nigra have never been investigated, and it was unclear if this subspecies represented a locally adapted population or a distinct species. Sequences from the nuclear marker RAG-1 (1149 bp), two novel... -
Ontogenetic variation and craniometric sexual dimorphism in the social giant mole-rat, Fukomys mechowii (Rodentia: Bathyergidae), from Zambia
Item type: Journal Article • Journal: African Zoology • Authors: C.T. Chimimba1 --- Department of Zoology and Entomology, South Africa A.M. Sichilima --- Department of Zoology and Entomology, South Africa C.G. Faulkes --- School of Biological and Chemical Sciences, U.K. N.C. Bennett --- Department of Zoology and Entomology, South AfricaThe degree of maxillary molar tooth-row eruption and wear were used to assign samples of the social giant mole-rat, Fukomys mechowii, from Zambia, into nine relative age classes in order to assess ontogenetic (age) variation and craniometric sexual dimorphism, with... -
Digestibility of nutrients and aspects of the digestive physiology of the greater cane rat, journalThryonomys swinderianus journalin two seasons
Item type: Journal Article • Journal: African Zoology • Authors: A. Van Zyl --- Department Zoology and Entomology, South Africa J.H. Delport --- Department Zoology and Entomology, South AfricaThe greater cane rat, Thryonomys swinderianus, utilizes high fibrous plant material and is an important meat source in West Africa. An insight in its digestive physiology will enhance our understanding of its feeding habits. Digestibility coefficients of the food were... -
Phylogeography of the African common toad, Amietophrynus regularis, based on mitochondrial DNA sequences: inferences regarding the Cape Verde population and biogeographical patterns
Item type: Journal Article • Journal: African Zoology • Authors: R. Vasconcelos --- CIBIO UP, Centro de Investigação em Biodiversidade e Recursos Genéticos, Portugal E. Froufe --- CIIMAR, Centro Interdisciplinar de Investigação Marinha e Ambiental, Portugal J.C Brito --- CIBIO UP, Centro de Investigação em Biodiversidade e Recursos Genéticos, Portugal S. Carranza --- Institute of Evolutionary Biology (CSIC UPF), Passeig Marítim de la Barceloneta, Spain D.J. Harris --- CIBIO UP, Centro de Investigação em Biodiversidade e Recursos Genéticos, PortugalThe amphibian Amietophrynus regularis is distributed throughout equatorial Africa, with presumed introduced populations in the Cape Verde archipelago. Portions of the 12S and 16S rRNA mitochondrial regions of 30 specimens from Kenya, Uganda, Niger, Mali, Burkina-Faso, Ghana, Guinea-Bissau and Cape... -
Late Pleistocene potential distribution of the North African sengi or elephant-shrew Elephantulus rozeti (Mammalia: Macroscelidea)
Item type: Journal Article • Journal: African Zoology • Authors: Árpád S. Nyári --- Natural History Museum and Biodiversity Research Center, U.S.A. Townsend A. Peterson&yg --- Natural History Museum and Biodiversity Research Center, U.S.A. Galen B. Rathbun --- Department of Ornithology and Mammalogy, California Academy of Sciences, U.S.A.The Sahara Desert was recently proposed as the agent of vicariant speciation in the North African elephant-shrew (order Macroscelidea, Elephantulus rozeti). Based on evidence from molecular dating, however, this speciation event was estimated as having occurred in the Miocene, an... -
Relationship between plant growth and organic acid exudates from ectomycorrhizal and non-ectomycorrhizal Pinus patula
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Rasheed Adeleke --- Department of Microbiology and Plant Pathology, South Africa T Eugene Cloete --- Department of Microbiology and Plant Pathology, South Africa Annick Bertrand --- Soil and Crops Research and Development Centre, Canada Damase P Khasa --- Centre for Forest Research and Institute of Integrative and Systems Biology, CanadaPlant–mycorrhizal interaction is an important association in the ecosystem with significant impacts on the physical, biological and chemical properties of the soil. In the present study, potential relationships that exist between organic acid production by ectomycorrhizal pine seedlings and plant... -
Antioxidant content and phytochemical properties of apple ‘Granny Smith’ at different harvest times
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Asanda Mditshwa --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Department of Horticultural Sciences, Faculty of AgriSciences, South Africa Filicity Vries --- Agricultural Research Council Infruitec-Nietvoorbij, South Africa Kobus van der Merwe --- Agricultural Research Council Infruitec-Nietvoorbij, South Africa Elke Crouch --- Department of Horticultural Sciences, Faculty of AgriSciences, South Africa Umezuruike Linus Opara --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Department of Horticultural Sciences, Faculty of AgriSciences, South AfricaUnderstanding the biochemical composition of fruit to be stored could be used as a tool for planning postharvest management to maintain quality and reduce losses of fresh fruit. This study evaluated the effects of harvesting fruit seven days before (H1)... -
Saliva fractions from South African Russian wheat aphid biotypes induce differential defence responses in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lintle Mohase --- Department of Plant Sciences, South Africa Bernice Taiwe --- Glen Agricultural College, South AfricaThe Russian wheat aphid (RWA), Diuraphis noxia (Kurdjomov, 1913), is a notorious pest that reduces yield in wheat. Nevertheless, the source of eliciting activity during RWA–wheat interaction has not been established. This paper reports on the isolation of eliciting activity... -
Staphylococcus aureus bacteraemia in children: a formidable foe
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: T Pretorius --- Department of Anaesthesia, South Africa B Brennan --- Department of Anaesthesia, South Africa J Thomas --- Department of Anaesthesia, South AfricaStaphylococcus aureus remains one of the most common causes of bacteraemia in children. In order to evade and overcome the immune responses of its host and any antimicrobial therapies aimed at destroying it, this organism, through various mechanisms, continues to... -
Temporal and spatial dynamics of mineral levels of forage, soil and cattle blood serum in two semi-arid savannas of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Alice F Gwelo --- Department of Livestock and Pasture, South Africa Solomon Tefera --- Department of Livestock and Pasture, South Africa Voster Muchenje --- Department of Livestock and Pasture, South AfricaIn this study, we examined temporal and spatial dynamics of minerals of forage, soil and cattle serum in two savannas (valley and plain) of South Africa. The aims were to explore the relationships between ecosystem components, and plan communal grazing... -
A comparison of planting and coppice regeneration of Eucalyptus grandis × Eucalyptus urophylla clones in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jacob W Crous --- Sappi Forests, South Africa Louisa Burger --- Department of Forest and Wood Science, South AfricaResults from two coppice compared to replant trials are presented that originated from clone by site interaction (CSI) trials established on high‑ and low‑productivity sites in subtropical coastal KwaZulu‑Natal, South Africa. After the 84‑month CSI trial measurements were completed the... -
Health policy implications of blood transfusion-related human T-cell lymphotropic virus type 1 infection and disease
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Hoosain Paruk --- Department of Neurology, South Africa Ahmed Bhigjee --- Department of Neurology, South AfricaHuman T-cell lymphotropic virus type 1 (HTLV-1) is the causative agent for HTLV-1-associated myelopathy (HAM) or tropical spastic paraparesis (TSP), and adult T-cell leukaemia (ATL). The virus is transmitted vertically from mother to child, and horizontally by sexual intercourse and... -
A Profile of the East African Community
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Frederick Onyango Ogola --- Strathmore University Business School, Kenya George N. Njenga --- Strathmore University Business School, Kenya Peter C. Mhando --- The Pennsylvania State University, USA Moses N. Kiggundu --- Carleton University Sprott School of Business, CanadaRegional integration in East Africa dates back more than a hundred years. This article provides a general synopsis of the East African Community (EAC) and traces the evolution of regional integration in Eastern Africa from colonial times to the present... -
Trophic relationships of hake (Merluccius capensis and M. paradoxus) and sharks (Centrophorus squamosus, Deania calcea and D. profundorum) in the Northern (Namibia) Benguela Current region
Item type: Journal Article • Journal: African Zoology • Authors: Johannes A Iitembu --- Department of Fisheries and Aquatic Sciences, Namibia Nicole B Richoux --- Department of Zoology and Entomology, South AfricaThe trophic relationships of two hake species (Merluccius capensis and M. paradoxus) and three shark species (Centrophorus squamosus, Deania calcea and D. profundorum) were investigated using nitrogen and carbon stable isotope signatures (δ15N and δ13C) of their muscle tissues. The... -
Evolutionary retention of defensive lateral pedal glands in the smallest siphonariid limpet (Gastropoda: Pulmonata)
Item type: Journal Article • Journal: African Zoology • Authors: Shirley C Pinchuck --- Electron Microscope Unit, Rhodes University, South Africa Brian R Allanson --- Department of Zoology and Entomology, South Africa Alan N Hodgson --- Department of Zoology and Entomology, South AfricaDespite its cryptic habitat and habits, light and transmission electron microscopy has revealed that like many other siphonariids Siphonaria compressa, the smallest species of this genus, possesses lateral pedal glands. The pear-shaped glands (about 120 µm long×70 µm maximum diameter)... -
The role of waterbirds in the dispersal of freshwater cladocera and bryozoa in southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Chevonne Reynolds --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Graeme S Cumming --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaIt has long been presumed that waterbirds disperse the propagules of aquatic organisms. However, it is only in recent years that this claim has been empirically explored and little is still known about waterbird-mediated dispersal in southern Africa. Aquatic invertebrates... -
Estimating the effect of HIV/AIDS on fertility among Malawian women using demographic and health survey data
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Emmanuel Souza --- Department of Population Studies, Malawi Tom A Moultrie --- Centre for Actuarial Research, South AfricaSeveral studies have shown that HIV is an important distal factor that affects a woman's fertility. This study investigates the effect of HIV on fertility among Malawian women using data from the 2004 and 2010 demographic and health surveys. Specifically,... -
Long walk from volkekunde to anthropology: reflections on representing the human in South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: C.S. (Kees) van der Waal --- Department of Sociology and Social Anthropology, South AfricaThis paper stems from a seminar that the author gave at his retirement from the Department of Sociology and Social Anthropology at Stellenbosch University earlier in 2015. It details his long personal, political and intellectual journey from volkekunde to social... -
The use of clove oil to induce anaesthesia, and its effects on blood chemistry, in Lates niloticus from Lake Victoria, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Kahwa --- Department of Wildlife and Aquatic Resources, College of Veterinary Medicine, Animal Resources and Biosecurity, Uganda J Rutaisire --- Aquaculture Research and Development Centre, Uganda H Kaiser --- Department of Ichthyology and Fisheries Science, South AfricaThe efficacy of clove oil as an anaesthetic and its effects on blood parameters in Nile perch Lates niloticus were evaluated in 2010. Clove oil concentrations of 49.3, 73.9 and 98.5 mg l−1 induced anaesthesia in <3 min, while the average recovery... -
Changes in the algal composition and water quality of the Sundays River, Karoo, South Africa, from source to estuary
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Janse van Vuuren --- Unit for Environmental Sciences and Management, South Africa JC Taylor --- Unit for Environmental Sciences and Management, South AfricaA first survey was done on algae present in the Sundays River from its source to its confluence with the sea. Species found in the upstream sections of the river included indicators of good water quality, but the quality deteriorated... -
Surface water quality in the Okavango Delta panhandle, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DT West --- Department of Zoology and Entomology, South Africa JG van As --- Department of Zoology and Entomology, South Africa LL van As --- Department of Zoology and Entomology, South AfricaThe Okavango Delta, a Ramsar and a World Heritage Site, is an important source of food and water in the Kalahari Desert of southern Africa. Although the eastern delta fan is a protected area, the rest, including the upstream panhandle,... -
Ecology, fish and fishery of Lake Liambezi, a recently refilled floodplain lake in the Zambezi Region, Namibia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RA Peel --- Department of Ichthyology and Fisheries Science, Namibia D Tweddle --- South African Institute for Aquatic Biodiversity, Namibia EK Simasiku --- Department of Wildlife Management and Ecotourism, Katima Mulilo Campus, South Africa GD Martin --- Department of Zoology and Entomology, South Africa J Lubanda --- Ministry of Fisheries and Marine Resources, Namibia CJ Hay --- Department of Biological Sciences, Namibia OLF Weyl --- South African Institute for Aquatic Biodiversity, South AfricaLake Liambezi (300 km2) refilled in 2009 after a prolonged 22-year dry period. Its aquatic macrophyte populations, fish fauna and fishery shortly after refilling are described. The emergent aquatic macrophyte Phragmites australis formed dense stands covering large parts of the lake,... -
Bioaccumulation and distribution of organochlorine residues across the food web in Lagos Lagoon, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B Akinsanya --- Department of Zoology, Nigeria R Alani --- Department of Chemistry, Nigeria UD Ukwa --- Department of Zoology, Nigeria F Bamidele --- Department of Zoology, Nigeria JK Saliu --- Department of Zoology, NigeriaEighteen organochlorine pesticide (OCP) residues were measured in the water, sediment, plankton, benthic invertebrates and fish in various sections of the Lagos Lagoon in 2014 to investigate their bioaccumulation and distribution in the food web. The analysis was done using... -
Saldanha Bay, South Africa I: the use of ocean colour remote sensing to assess phytoplankton biomass
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ME Smith --- Marine Remote Sensing Unit, Department of Oceanography, South Africa GC Pitcher --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, South AfricaThe efficacy of ocean colour remote sensing in assessing the variability of phytoplankton biomass within Saldanha Bay is examined. Satellite estimates of chlorophyll a (Chl a) were obtained using the maximum peak-height (MPH) algorithm on full-resolution (300 m) data from the... -
Three-dimensional visualisation of brooding behaviour in two distantly related brittle stars from South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Landschoff --- Department of Biological Sciences and Marine Research Institute, South Africa CL Griffiths --- Department of Biological Sciences and Marine Research Institute, South AfricaBrooding in ophiuroids (Echinodermata: Ophiuroidea) is a highly-developed reproduction strategy and has evolved independently several times. In South African waters, brooding occurs both in the very small amphiurid Amphipholis squamata, which is hermaphroditic, and in the large ophiodermatid Ophioderma wahlbergii,... -
Biophysical models of larval dispersal in the Benguela Current ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Lett --- UMI IRD 209 UPMC UMMISCO, Centre de Recherche Halieutique Méditerranéenne et Tropicale, France CD van der Lingen --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, South Africa BR Loveday --- Remote Sensing Group, Plymouth Marine Laboratory, UK CL Moloney --- Marine Research Institute and Department of Biological Sciences, South AfricaWe synthesise and update results from the suite of biophysical, larval-dispersal models developed in the Benguela Current ecosystem. Biophysical models of larval dispersal use outputs of physical hydrodynamic models as inputs to individual-based models in which biological processes acting during... -
Environmental influence on phytoplankton production during summer on the KwaZulu-Natal shelf of the Agulhas ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Lamont --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa RG Barlow --- Bayworld Centre for Research and Education, South AfricaDuring February 2010, studies of primary production (PP) and physiology were conducted at five selected sites in the KwaZulu-Natal (KZN) Bight of the Agulhas ecosystem as part of a programme to elucidate the influence of major physical driving forces and... -
Diet and gill morphology of the East Coast redeye round herring Etrumeus wongratanai off KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LD Vorsatz --- Department of Biodiversity and Conservation Biology, South Africa CD van der Lingen --- Branch: Fisheries Management, Department of Agriculture, South Africa MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaStomach content analyses and measurements of gillraker morphology were used to assess the diet and feeding ecology of the East Coast redeye round herring Etrumeus wongratanai and provide data for comparisons with other small pelagic fishes off South Africa. Samples... -
Engine performance of biodiesel-biodiesel blends at varying engine speeds
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Godwin K. Ayetor --- Department of Automotive Engineering, Ghana Albert K. Sunnu --- Department of Mechanical Engineering, GhanaBiodiesel blends with petroleum diesel have long been experimented on and considered good alternatives to petroleum diesel. Most blends considered biodiesel percentages of 20 and less. This work considered blending B100 of separate biodiesel feedstocks to determine their influence on... -
Small farmers’ adoption behaviour: Uptake of elephant crop-raiding deterrent innovations in the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sekondeko R. Noga --- Okavango Research Institute, Botswana Oluwatoyin D. Kolawole --- Okavango Research Institute, Botswana Olekae Thakadu --- Okavango Research Institute, Botswana Gaseitsiwe Masunga --- Okavango Research Institute, BotswanaThis paper invokes the adoption-diffusion model to examine two introduced elephant crop-raiding deterrent innovations (ECDIs), and the factors influencing their adoption by small farmers in the Okavango Delta, Botswana. Two communities (Gudigwa and Eretsha) were purposefully selected as case studies... -
Estimating rotor resistance of wound rotor induction motor by look-up table and fuzzy logic approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chitra Venugopal --- Department of Electrical Engineering, School of Engineering, South AfricaWound rotor induction motors are commonly used in high torque, adjustable speed industrial applications. The provision to add external resistances to the rotor offers high starting torque and smooth starting at a low starting current. In this paper, the look-up... -
Use of low cost pest exclusion nets can boost cabbage yield
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: J. Kiptoo --- Department of Biological Science, Kenya M. Kasina --- National Sericulture Research Center (KALRO), Kenya F. Wanjala --- Department of Biological Science, Kenya P. Kipyab --- Kenya Plant Health Inspectorate Service, Kenya L.A. Wasilwa --- Kenya Agricultural Research Institute, Kenya M. Ngouajio --- Michigan State University, USA T. Martin --- Cirad UR Hortsys, FranceIn this study, low-cost pest exclusion nets (lcPENs) were evaluated to determine their efficacy in reducing pest infestation and enhancing yields of cabbage at KALRO Kabete and PTC (Practical Training Centre) Thika, Kenya, from March to September 2011 both at... -
Effects of short-term water deficit stress on physiological characteristics of Bambara groundnut (Vigna subterranea (L.) Verdc.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Yusuf Y Muhammad --- School of Biosciences, Malaysia Sean Mayes --- Plant and Crop Sciences, School of Biosciences, UK Festo Massawe --- School of Biosciences, MalaysiaBambara groundnut (Vigna subterranea (L.) Verdc.) is an annual leguminous food crop native to Africa. The crop is grown in marginal soils and it is considered to be a drought-resistant species. However, there is limited information on the ways Bambara... -
Differential dependence of apple (Malus domestica Borkh.) cultivars on the xanthophyll cycle for photoprotection
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Simeon Hengari --- WRaDAC, Namibia Karen I Theron --- Department of Horticultural Science, South Africa Stephanie JE Midgley --- 84 Arum Road, South Africa Willem J Steyn --- Department of Horticultural Science, South AfricaThe dependence of fruit peel photosystems of ‘Granny Smith’, ‘Braeburn’, ‘Fuji’, ‘Golden Delicious’ and ‘Topred’ apple (Malus domestica Borkh.) peel on the xanthophyll cycle for photoprotection was studied under laboratory conditions. Mature fruit peel was either treated with 1 mm dithiothreitol... -
Significant population of Egyptian Vulture Neophron percnopterus found in Morocco
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mohamed Amezian --- Department of Biology, Faculty of Sciences, Morocco Rachid El Khamlichi --- Group for Research and Protection of Birds in Morocco (GREPOM/BirdLife Morocco), regional section of Tangier-Tétouan, MoroccoThe Egyptian Vulture Neophron percnopterus population in Morocco has undergone a marked decline since the 1980s to the point of nearing local extinction in the twenty-first century. A field study of some possible sites for Egyptian Vultures was carried out... -
An analysis of Bat Hawk Macheiramphus alcinus diet in the Melaky Region of lowland western Madagascar
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Steven M Goodman --- Field Museum of Natural History, USA Stéphanie VJ Razakaratrimo --- Peregrine Fund Madagascar, Madagascar Lily-Arison Réné de Roland --- Peregrine Fund Madagascar, MadagascarWe present information on the prey taken by the Bat Hawk Macheiramphus alcinus in two different areas of lowland western central Madagascar. These are the first dietary data from Madagascar for this widespread Old World species. The recovered remains were... -
Sex determination of African Penguins Spheniscus demersus using bill measurements: method comparisons and implications for use
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kate J Campbell --- Animal Demography Unit, Department of Biological Sciences, South Africa Danielle Farah --- School of Biological Sciences, UK Sarah Collins --- School of Biological Sciences, UK Nola J Parsons --- Southern African Foundation for the Conservation of Coastal Birds, South AfricaAfrican Penguins Spheniscus demersus are sexually dimorphic; on average, males are larger than females but measurements overlap making sex determination difficult through observations alone. We developed a discriminant function, using bill length and depth from a sample of birds sexed... -
Shade tolerance and suitability of tree species for planting in rubber plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Yaohua Tian --- Yunnan Institute of Tropical Crops, China Huifang Yuan --- Yunnan Institute of Tropical Crops, China Jiang Xie --- Yunnan Institute of Tropical Crops, China Yulong Zheng --- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, ChinaThe rapid increase in rubber monoculture in Xishuangbanna has resulted in extensive damage to its local ecosystem. To decrease the negative effects, the concept of the ecological-economic rubber plantation (EERP) system was proposed. The EERP entails intercropping rubber plants with... -
Diversity and identification of fungi associated with needles of Pinus radiata in Tasmania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Istiana Prihatini --- Tasmanian Institute of Agriculture, Australia Morag Glen --- Tasmanian Institute of Agriculture, Australia Tim J Wardlaw --- Forestry Tasmania, Hobart, Australia Caroline L Mohammed --- Tasmanian Institute of Agriculture, AustraliaNeedle fungi have been extensively studied in conifers but rarely in Pinus radiata. Previous studies of P. radiata have been based on fungal isolation and not direct PCR detection from needles. This research was a component of a study examining... -
Strengthening primary health care through primary care doctors: the design of a new national Postgraduate Diploma in Family Medicine
Item type: Journal Article • Journal: South African Family Practice • Authors: R Mash --- Division of Family Medicine and Primary Care, Republic of South Africa Z Malan --- Division of Family Medicine and Primary Care, Republic of South Africa K von Pressentin --- Division of Family Medicine and Primary Care, Republic of South Africa J Blitz --- Division of Family Medicine and Primary Care, Republic of South AfricaStrengthening primary health care is a national priority in South Africa, in order to improve quality of care and health outcomes, reduce inequity and to pave the way for National Health Insurance. The World Health Organization and World Health Assembly... -
Clinico-epidemiological spectrum of melioidosis: a 2-year prospective study in the western coastal region of India
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Sagar Chandrakar --- Department of Microbiology, India Meena Dias --- Department of Microbiology, IndiaObjective: To determine the geographical epidemiology, clinical presentations and risk factors associated with melioidosis. -
Observations of terrestrial locomotion in wild Polypterus senegalus from Lake Albert, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TY Du --- Redpath Museum, Canada HCE Larsson --- Redpath Museum, Canada EM Standen --- Department of Biology, CanadaPolypterids, the most basal actinopterygians, are a group of fish long-considered living fossils and holding a key position for understanding fish and tetrapod evolution. Knowledge of the natural history of Polypterus is limited, their having been studied in little detail... -
Marcusenius desertus sp. nov. (Teleostei: Mormyridae), a mormyrid fish from the Namib desert
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LB Kramer --- Zoological Institute, Germany FH van der Bank --- African Centre for DNA Barcoding, Department of Zoology, South Africa M Wink --- Institute of Pharmacy and Molecular Biotechnology, GermanyWe critically compared Marcusenius specimens from the mouth of the Cunene River on the Namibia/Angola border, a harsh desert environment on the Atlantic Ocean coast virtually devoid of aerial insects with aquatic larvae which are an important food item, with... -
Carbon stocks of the terraces of the Lower Tana River floodplain and delta, Kenya, prior to conversion for biofuel production
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LV Mukhwana --- Kenya Wetlands Biodiversity Research Team (KENWEB), Kenya Q Luke --- Kenya Wetlands Biodiversity Research Team (KENWEB), Kenya E Delmas --- Kenya Wetlands Biodiversity Research Team (KENWEB), Kenya K Otoi --- Kenya Wetlands Biodiversity Research Team (KENWEB), Kenya O Hamerlynck --- Kenya Wetlands Biodiversity Research Team (KENWEB), Kenya L Vandepitte --- Flanders Marine Institute (VLIZ), Belgium B Adkins --- Dadacha Consulting Ltd, KenyaFew studies have addressed the terraces adjacent to the Tana River and delta. In May 2012 a survey assessed the woody vegetation of the terraces in anticipation of their conversion to a biofuel farm. The 64 000 hectares targeted by... -
Have grass carp driven declines in macrophyte occurrence and diversity in the Vaal River, South Africa?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PSR Weyl --- Zoology and Entomology Department, South Africa GD Martin --- Zoology and Entomology Department, South AfricaThe Vaal River, South Africa, historically had a rich diversity of native submerged macrophytes with at least 13 species from 5 families recorded. Over the past 10 years there has been a noticeable reduction in the occurrence and diversity of... -
Thermal optimum: time, intimacy and the elemental in the first thousand days of life
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Fiona C. Ross --- Anthropology, School of African and Gender Studies, Anthropology and Linguistics, South Africa Nicholas Eppel --- Plumstead, South Africa“Thermal Optimum” is a collaboration between photographer Nicholas Eppel and anthropologist Fiona C. Ross. Focusing on pregnancy and early childhood, we sought a way to open questions about how the “hard facts” of biology are given force and presence through... -
Visual interruptions: a reflection on “Thermal optimum: time, intimacy and the elemental in the first thousand days of life”
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Kharnita Mohamed --- Department of Social Anthropology, School of African and Gender Studies, Anthropology and Linguistics, South AfricaIn this commentary, Kharnita Mohamed critically assesses Fiona C. Ross and Nicholas Eppel’s photo essay, “Thermal Optimum: Time, Intimacy and the Elemental in the First Thousand Days of Life.” The essay is published alongside this commentary. -
Kounis syndrome: a narrative review
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Petrus Fourie --- Department of Anaesthesiology and Critical Care, South AfricaInflammatory mediators released from activated mast cells and basophils during hypersensitivity reactions have direct pathological effects on the myocardium and coronary vasculature. It was traditionally thought that cardiovascular signs and symptoms in anaphylaxis are largely due to peripheral vasodilation and... -
Does the cellphone radio-frequency electromagnetic radiation during ringing or talking modes induce locomotor disturbance in Drosophila melanogaster?
Item type: Journal Article • Journal: African Zoology • Authors: Mervat A Seada --- Zoology Department, Faculty of Science, Egypt Samar E Elkholy --- Zoology Department, Faculty of Science, Egypt Wesam S Meshrif --- Zoology Department, Faculty of Science, EgyptDebate regarding the biological effect of electromagnetic radiation has been recently raised. The effects of this radiation on locomotor activity are not well known. Hence, in this study, we used Drosophila melanogaster as a model organism to investigate the possible... -
Physiological response of one of South Africa’s premier freshwater sport angling species, the Orange-Vaal smallmouth yellowfish Labeobarbus aeneus, to catch-and-release angling
Item type: Journal Article • Journal: African Zoology • Authors: Nico J Smit --- Water Research Group (Ecology), Unit for Environmental Sciences and Management, Potchefstroom Campus, South Africa Ruan Gerber --- Department of Zoology, Kingsway Campus, South Africa Richard Greenfield --- Department of Zoology, Kingsway Campus, South Africa Glyn Howatson --- Water Research Group (Ecology), Unit for Environmental Sciences and Management, Potchefstroom Campus, South AfricaThe practice of catch-and-release fishing has been widely promoted by angling fraternities as a fisheries manage- ment tool. The aim of this investigation was to determine the physiological response of Orange-Vaal smallmouth yellowfish, Labeobarbus aeneus, to catch-and-release angling in the... -
Characterisation of the dietary relationships of two sympatric hake species, Merluccius capensis and M. paradoxus, in the northern Benguela region using fatty acid profiles
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JA Iitembu --- Department of Fisheries and Aquatic Sciences, Namibia NB Richoux --- Department of Zoology and Entomology, South AfricaThe two sympatric species of Cape hake, Merluccius capensis and M. paradoxus, have been the main targets of bottom-trawl fisheries off Namibia for several decades. The feeding ecology of these hakes has been studied mainly using stomach content analyses and... -
Spatial characterisation of the Benguela ecosystem for ecosystem-based management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Kirkman --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa L Blamey --- Marine Research Institute, South Africa T Lamont --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa JG Field --- Marine Research Institute, South Africa G Bianchi --- Food and Agriculture Organization, Italy JA Huggett --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa L Hutchings --- Marine Research Institute, South Africa J Jackson-Veitch --- Marine Research Institute, South Africa A Jarre --- Marine Research Institute, South Africa C Lett --- Institut de Recherche pour le Développement [IRD], UMR MARBEC 248, France MR Lipiński --- Department of Ichthyology and Fisheries Science, South Africa SW Mafwila --- Department of Fisheries and Aquatic Sciences, Namibia MC Pfaff --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa T Samaai --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa LJ Shannon --- Marine Research Institute, South Africa Y-J Shin --- Marine Research Institute, South Africa CD van der Lingen --- Marine Research Institute, South Africa D Yemane --- Marine Research Institute, South AfricaThe three countries of the Benguela Current Large Marine Ecosystem (BCLME), namely Angola, Namibia and South Africa, have committed to implementing ecosystem-based management (EBM) including an ecosystem approach to fisheries (EAF) in the region, to put in practice the principles... -
Morphometric variation in the cutlassfish Trichiurus lepturus on the Kenyan coast: implications for stock identification and management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SM Mwakiti --- University of Eldoret, Kenya B Kaunda-Arara --- University of Eldoret, Kenya CM Mlewa --- Pwani University, Kenya R Ruwa --- Kenya Marine Fisheries Research Institute, KenyaMorphometric variation was used to study population structure of the cutlassfish Trichiurus lepturus on the Kenyan coast. In all, 16 morphometric measurements taken from 193 individuals from six sites were subjected to multivariate statistical analysis in order to determine possible... -
Biodiversity and studies of marine symbiotic siphonostomatoids off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SM Dippenaar --- Department of Biodiversity, South AfricaCurrent knowledge of the biodiversity of the symbiotic marine siphonostomatoids from South African waters (136 species) is sparse compared to that globally (1 388 species). The difference is especially apparent when taking into account the diversity of fish (more than... -
Recent population trends of sooty and light-mantled albatrosses breeding on Marion Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Schoombie --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, South Africa RJM Crawford --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa AB Makhado --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, South Africa BM Dyer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, South AfricaSub-Antarctic Marion Island is one of the few islands where both species of Phoebetria albatrosses breed sympatrically. The last published assessment of their population trends, which reported counts up to 2008, concluded that the numbers of breeding pairs of sooty... -
Developing lifelong customers in the mobile phone market: A South African case study
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Keagile Mati --- Business School, South Africa Richard Shambare --- Department of Business Management, South AfricaThis paper argues that, to survive in increasingly competitive mobile phone markets, mobile phone service providers should develop marketing strategies that not only address immediate marketing needs of short-term profitability, but also emphasise developing lifelong customers. Although this approach might... -
Genetic diversity of bottle gourd (Lagenaria siceraria (Molina) Standl.) landraces of South Africa assessed by morphological traits and simple sequence repeat markers
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Jacob Mashilo --- Towoomba Research Station, Limpopo Department of Agriculture, South Africa Hussein Shimelis --- African Centre for Crop Improvement, South Africa Alfred Odindo --- Crop Science Discipline, South AfricaBottle gourd (Lagenaria siceraria (Molina) Standl.) is an important crop in rural communities in South Africa but it remains under-researched. The objective of this study was to assess the genetic diversity present amongst bottle gourd landraces grown by smallholder farmers... -
Hospitableness and sustainable development: New responsibilities and demands in the host-guest relationship
Item type: Journal Article • Journal: • Authors: Arjan van Rheede --- Research Centre, Hotelschool, The Hague, The Netherlands Daphne Maria Dekker --- Research Centre, Hotelschool, The Hague, The NetherlandsHow does the current paradigm of the host-guest relationship cause the hospitality industry to lag behind in sustainable development? Hospitality is often defined as “a feeling of being welcome”. It is about “welcoming the stranger: a person who comes today... -
The power of research in finance to enhance sustainability – Applied to practice
Item type: Journal Article • Journal: • Authors: Gernot Peichl --- Hilton Tallinn Park, Accounting and Finance Department, Tallinn, EstoniaMany people think of research in the hospitality industry as being difficult to relate to practice. This paper shows not only how theory can be applied to practice, but also how practice is related to theory with regard to concepts... -
Multiple cardiovascular disease risk factors in rural Kenya: evidence from a health and demographic surveillance system using the WHO STEP-wise approach to chronic disease risk factor surveillance
Item type: Journal Article • Journal: South African Family Practice • Authors: PM Chege --- Department of Family Medicine, KenyaBackground: To describe the distribution of obesity, hypertension, dysglycaemia and dyslipidaemia (which are risk factors for cardiovascular disease) using a Health and Demographic Surveillance System (HDSS) site in western Kenya. -
Physical activity of children from a small rural town, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: E Minnaar --- Private Practice General Practitioner, South Africa CC Grant --- Section Sports Medicine, South Africa L Fletcher --- Department of Statistics, South AfricaIntroduction: Physical activity plays an integral role in the normal physical, mental, social and cognitive development of children. One of the main reasons for overweight children in low- and middle-income countries like South Africa is inactivity. This study’s aim was... -
Lymphovascular space invasion in early-stage endometrial cancer: adjuvant treatment and patterns of recurrence
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Esther van Barneveld --- Department of Obstetrics and Gynaecology, The Netherlands David G Allen --- Department of Obstetrics and Gynaecology, Australia Ruud LM Bekkers --- Department of Obstetrics and Gynaecology, The Netherlands Peter T Grant --- Department of Obstetrics and Gynaecology, AustraliaBackground: In early-stage endometrial cancer, lymphovascular space invasion (LVSI) is an independent predictor of relapse of disease and poorer survival. Nevertheless, adjuvant treatment for LVSI-positive patients is variable. -
Retrospective comparison of cytological and histological bone marrow morphology in adult antiretroviral-naïve and antiretroviral experienced human immunodeficiency virus-infected patients with peripheral blood cytopaenias
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Suraya Naidoo --- Department of Haematology, South Africa Vincent Louis Naicker --- National Health Laboratory Services, South AfricaBackground: A cohort of human immunodeficiency virus (HIV)-positive patients presenting to a quaternary hospital in KwaZulu-Natal, South Africa over a period of one year was identified and morphological analyses of their bone marrow aspirates and trephine biopsies (BMAT) undertaken. -
Childhood physical and sexual abuse, and adult health risk behaviours among university students from 24 countries in Africa, the Americas and Asia
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- ASEAN Institute for Health Development, Thailand Supa Pengpid --- ASEAN Institute for Health Development, ThailandThe goal of this study was to retrospectively estimate the prevalence of childhood physical abuse (CPA) and childhood sexual abuse (CSA) in relation to experience of adult violence, poor mental health, addictive behaviour and sexual risk behaviour among university students... -
Psychometric properties of a measure of psychological factors among francophone adolescent learners in a South African setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Moletsane Mokgadi --- Department of Educational Psychology, South Africa Robert Kananga Mukuna --- Department of Educational Psychology, South AfricaThis study reported on the psychometric properties of a prospective measure of psychological wellbeing among immigrant francophone adolescent learners in high schools in the Western Cape, South Africa. The sample size comprised 170 participants (females = 51%; age range 14... -
Furcocercous cercariae shed by the freshwater snails Pila occidentalis (Mousson, 1887) and Biomphalaria pfeifferi (Krauss, 1848) in the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Jansen van Rensburg --- Department of Zoology and Entomology, South Africa PH King --- Department of Biology, South Africa JG van As --- Department of Zoology and Entomology, South AfricaDuring July 2009 and 2010 surveys of snail-borne larval trematodes of the Okavango Delta floodplains and lagoons were undertaken. Cercaria mohemboense were shed by Pila occidentalis (Mousson, 1887) and Cercaria dubaensis and Cercaria indistinctus were shed by Biomphalaria pfeifferi (Krauss,... -
Nile perch and the transformation of Lake Victoria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Taabu-Munyaho --- National Fisheries Resources Research Institute (NaFIRRI), Uganda BE Marshall --- Lake Victoria Fisheries Organisation (LVFO), New Zealand T Tomasson --- United Nations University – Fisheries Training Programme (UNU–FTP), Marine Research Institute, Iceland G Marteinsdottir --- Institute of Biology, IcelandThe transformation of Lake Victoria that began in 1980 followed the population explosion of Nile perch Lates niloticus, causing the apparent extirpation of 500+ endemic haplochromine species and dramatic physico-chemical changes. Officially introduced in 1962–1963, but present earlier, the reasons... -
The Eucalyptus shoot and leaf pathogen Teratosphaeria destructans recorded in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Izette Greyling --- Forestry and Agricultural Biotechnology Institute (FABI), Department of Microbiology and Plant Pathology, South Africa Michael J Wingfield --- Forestry and Agricultural Biotechnology Institute (FABI), Department of Microbiology and Plant Pathology, South Africa Martin PA Coetzee --- Forestry and Agricultural Biotechnology Institute (FABI), Department of Genetics, South Africa Seonju Marincowitz --- Forestry and Agricultural Biotechnology Institute (FABI), Department of Microbiology and Plant Pathology, South Africa Jolanda Roux --- Forestry and Agricultural Biotechnology Institute (FABI), Department of Plant Sciences, South AfricaSpecies of Teratosphaeria include some of the most important fungal pathogens of plantation-grown eucalypt trees. During routine disease surveys, symptoms and signs of leaf spot and blight were observed on the foliage of one-year-old E. grandis × E. urophylla hybrids... -
Inferring population trends of Araucaria angustifolia (Araucariaceae) using a transition matrix model in an old-growth forest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Giovani F Paludo --- Grupo Uso e Conservação dos Recursos Florestais, Brazil Miguel B Lauterjung --- Grupo Uso e Conservação dos Recursos Florestais, Brazil Maurício S dos Reis --- Núcleo de Pesquisas em Florestas Tropicais, Brazil Adelar Mantovani --- Grupo Uso e Conservação dos Recursos Florestais, BrazilMatrix population models may generate important information to prevent undesirable outcomes for endangered species. This is the case for Araucaria angustifolia, a Critically Endangered conifer, with little knowledge regarding its life history and trends in development over time. This study... -
Cocoa and chocolate consumption – Are there aphrodisiac and other benefits for human health?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Eo. Afoakwa --- Centre for Food Quality, Strathclyde Institute for Pharmacy and Biomedical Sciences, United KingdomAbstract -
Socio-demographic profiles and anthropometric status of 0- to 71-month-old children and their caregivers in rural districts of the Eastern Cape and KwaZulu-Natal provinces of South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Cm. Smuts --- Nutritional Intervention Research Unit, M. Faber --- Nutritional Intervention Research Unit, Se. Schoeman --- Nutritional Intervention Research Unit, Ja. Laubscher --- Biostatics Unit, A. Oelofse --- Centre for Nutrition, Ajs. Benadé --- Cape Peninsula University of Technology, Ma. Dhansay --- Nutritional Intervention Research Unit,Abstract -
Determinants of obesity in an urban township of South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: R Malhotra --- Department of Community and Family Medicine, USA C Hoyo --- Department of Community and Family Medicine, USA T Østbye --- Department of Community and Family Medicine, USA G Hughes --- Departments of Family Medicine and Surgery, Brody School of Medicine, USA D Schwartz --- Department of Community and Family Medicine, USA L Tsolekile --- School of Public Health, South Africa J Zulu --- School of Public Health, South Africa T Puoane --- School of Public Health, South AfricaObjective: To estimate the prevalence of overweight and obesity, and identify factors associated with Body Mass Index (BMI) and waist circumference (WC) among adults residing in an urban township in South Africa. -
Nutrition interventions in the workplace: Evidence of best practice
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Np Steyn --- Knowledge Systems, W. Parker --- Knowledge Systems, Ev Lambert --- Sports Science Institute, Department of Human Biology, Z. Mchiza --- Knowledge Systems,Aim: The aim of this desktop study was to review all workplace interventions having a nutrition component, published in peer-reviewed literature between 1995 and 2006 by WHO, and to document activities that were successful, as well as possible barriers to... -
Nutritional, immune, micronutrient and health status of HIV-infected children in care centres in Mangaung
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: L. Steenkamp --- Nutrition Consultant in Private Practice, A. Dannhauser --- Department of Dietetics and Human Nutrition, South Africa D. Walsh --- General Practitioner, G. Joubert --- Department of Biostatistics, South Africa Fj Veldman --- School of Health Technology, South Africa E. Van der Walt --- Department of Dietetics and Human Nutrition, South Africa C. Cox --- Department of Dietetics and Human Nutrition, South Africa Mk Hendricks --- School of Child and Adolescent Health, South Africa H. Dippenaar --- Department of Family Practice, South AfricaAim: To assess the nutritional, immune, micronutrient and health status of antiretroviral-naïve HIV-infected children. -
A review of school nutrition interventions globally as an evidence base for the development of the HealthKick programme in the Western Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Np Steyn --- Knowledge Systems, Ev Lambert --- Sports Science Institute, Department of Human Biology, W. Parker --- Knowledge Systems, Z. Mchiza --- Knowledge Systems, A. De Villiers --- Chronic Diseases of Lifestyle Unit,Aim: The aim of this study was to review all school interventions having a nutrition component, published in peer-reviewed literature between 1995 and 2006, and to document activities that were successful as well as those that were possible barriers in... -
Socio-demographic risk factors for HIV infection in women living in Mangaung, Free State
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Z Hattingh [AN0001] C Walsh --- Department of Nutrition and Dietetics, South Africa G Joubert --- Department of Biostatistics, South AfricaObjective: To determine socio-demographic risk factors associated with HIV infection in women in Mangaung. -
Adverse social, nutrition and health conditions in rural districts of the KwaZulu-Natal and Eastern Cape provinces, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: S. Schoeman --- Nutritional Intervention Research Unit, South Africa M. Faber --- Nutritional Intervention Research Unit, South Africa V. Adams --- Currently from Scifest, South Africa C. Smuts --- School for Physiology, Nutrition and Consumer Science, Potchefstroom N. Ford-Ngomane --- Health Systems Trust, South Africa J. Laubscher --- Biostatistics Unit, South Africa M. Dhansay --- Currently from Executive Research Directorate, South AfricaObjective: This study determined the socio-demographic, nutritional and health status of children and their caregivers in two rural districts in KwaZulu-Natal (KZN) and one rural district in the Eastern Cape (EC), South Africa. -
Immunonutrition: a South African perspective
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: A. Prins --- Little Company of Mary Medical Centre, J. Visser --- Division of Human Nutrition, Faculty of Medicine and Health Sciences,Clinical nutrition has evolved from providing nutrients to meet the patient’s needs to nutrition therapy that additionally aims to provide specific nutrients, or combinations thereof, which can reduce infection and improve outcomes in critically ill patients. The value of immunonutrition... -
The influence of socio-demographic factors on the nutritional status of children in the Stellenbosch area, Western Cape
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Ap Kirsten --- Division of Human Nutrition, D Marais --- Division of Applied Health Sciences, C Schübl --- Division of Human Nutrition, Faculty of Medicine and Health Sciences,Objectives: To determine the prevalence of overweight and obesity, as well as socio-demographic risk factors associated with childhood overweight and obesity in the Stellenbosch area, Western Cape province. -
Adaptation of the RenalSmart® web-based application for the dietary management of patients with diabetic nephropathy
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: N Esau --- Department of Human Nutrition, N Koen --- Division of Human Nutrition, Mg Herselman --- Division of Human Nutrition, Faculty of Health Sciences,Objectives: The aim of this study was to develop and test a web-based application for the dietary management of patients with diabetic nephropathy. -
Treating an intervention level 1 patient: futile or brave?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: N Solomons --- Department of Dietetics, N Nortje --- Department of Psychology,An ethical dilemma describes conflicting opinions by different members of the care team. This article focuses on AJ, a five-year-old child with cerebral palsy, who was born deaf and blind as a result of having contracted rubella in utero. The... -
When science meets culture: the prevention and management of erectile dysfunction in the 21st century
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Sm Kassier --- Discipline of Dietetics and Human Nutrition, Pietermaritzburg Fj Veldman --- Discipline of Dietetics and Human Nutrition, PietermaritzburgTraditionally, the term “impotence” has been used to signify a male’s inability to attain and maintain an erection.Impotence, in most circumstances, is more precisely referred to as erectile dysfunction (ED). An estimated 10-20 million men suffer from the condition.However, this... -
Factors associated with central overweight and obesity in students attending the University for Development Studies in Tamale, Ghana: a cross-sectional study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: V. Mogre --- Department of Human Biology, Ghana S. Aleyira --- Department of Allied Health Sciences, Ghana R. Nyaba --- Department of Allied Health Sciences, GhanaObjectives: This study assessed the prevalence of central overweight and obesity in students of the University for Development Studies in Tamale, Ghana. Lifestyle factors associated with central overweight and obesity were also investigated in this study population. -
Narratives of urban female adolescents in South Africa: dietary and physical activity practices in an obesogenic environment
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Mh Sedibe --- MRC/WITS Developmental Pathways for Health Research Unit Department of Paediatrics, Johannesburg Ab Feeley --- MRC/WITS Developmental Pathways for Health Research Unit Department of Paediatrics, Johannesburg C. Voorend --- Faculty of Earth and Life Sciences, The Netherlands Pl. Griffiths --- MRC/WITS Developmental Pathways for Health Research Unit Department of Paediatrics, Johannesburg Cm Doak --- Faculty of Earth and Life Sciences, The Netherlands Sa Norris --- MRC/WITS Developmental Pathways for Health Research Unit Department of Paediatrics, JohannesburgObjectives: The objectives of this study were to investigate the narratives pertaining to dietary and physical activity practices by female adolescents in Soweto. -
SASPEN Case Study: Nutritional management of a patient at high risk of developing refeeding syndrome
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Rc. Dolman --- Centre of Excellence for Nutrition, C. Conradie --- Centre of Excellence for Nutrition, Mj. Lombard --- Centre of Excellence for Nutrition, A. Nienaber --- Centre of Excellence for Nutrition, M. Wicks --- Centre of Excellence for Nutrition,The following case study was discussed during the fourth-year dietetics evaluation process at North-West University, Potchefstroom Campus. It is a reflection of the opinion of the dietitians, students and lecturers involved, describes the actions taken during the nutritional management of... -
Eating, drinking and physical activity in Faculty of Health Science students compared to other students at a South African university
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: A. Gresse --- Nelson Mandela Metropolitan University, L. Steenkamp --- Nelson Mandela Metropolitan University, J. Pietersen --- Nelson Mandela Metropolitan University,Objectives: Students studying towards a qualification in Health Sciences should have more knowledge of a healthy lifestyle than other university students. However, it has been questioned whether or not these students apply such knowledge. While studies have been conducted on... -
Fuel properties comparison of species of microalgae and selected second-generation oil feedstocks
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Andrew C. Eloka-Eboka --- Discipline of Mechanical Engineering, South Africa Chiemela Onunka --- Discipline of Mechanical Engineering, South AfricaComparative investigation and assessment of microalgal technology as a biodiesel production option was studied alongside other second generation feedstocks. This was carried out by comparing fuel properties of species of Chlorella vulgaris, Duneliella spp., Synechococus spp. and Senedesmus spp. with... -
Traditional medicine use in surgical patients in a South African tertiary hospital
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: GD Nethathe --- Faculty of Health Sciences, South Africa T Matamba --- Chris Hani Baragwanath Academic Hospital, University of the Witwatersrand, South Africa J Malumalu --- Chris Hani Baragwanath Academic Hospital, University of the Witwatersrand, South Africa N Dladla --- Chris Hani Baragwanath Academic Hospital, University of the Witwatersrand, South Africa T Bayibayi --- Chris Hani Baragwanath Academic Hospital, University of the Witwatersrand, South Africa SL Russell --- Department of Anesthesia and Perioperative Medicine, CanadaBackground: The use of traditional medicine (TM) in South Africa is reportedly high. TM use in a South African surgical population presenting for elective surgery is unknown. -
Psychometric properties of beliefs about relationship violence against women and gender stereotypes scale
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sunday B. Fakunmoju --- Department of Social Work, USA Funmi O. Bammeke --- Department of Sociology, Nigeria Felicia A. D. Oyekanmi --- Department of Sociology, Nigeria Segun Temilola --- Department of Sociology, Nigeria Bukola George --- Department of Sociology, NigeriaThis article describes psychometric properties of the Gender-Based Relationship Violence Beliefs Scale (BEREVIWOS) and the Gender Stereotypes and Beliefs (GESTABE) scale in a Nigerian setting. Analysis was based on a convenience sample of 202 respondents. Confirmatory factor analysis (CFA) was... -
Adolescent boys with obesity: The lived experiences
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jenilee Axsel --- Department of Educational Psychology, Chris Myburgh --- Department of Educational Psychology, Marie Poggenpoel --- Department of Nursing Science, South AfricaThis study explored and described the lived experiences of adolescent boys who are obese. Participants were a purposive sample of nine boys between the ages of 13 and 18, six of them currently with obesity and with BMI levels at... -
Spatial metrics effect of forest fragmentation on forest bird abundance and site occupancy probability: the influence of patch size and isolation
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robert B Modest --- Department of Wildlife Management, Tanzania Shombe N Hassan --- Department of Wildlife Management, Tanzania Alfan A Rija --- Department of Wildlife Management, TanzaniaThe persistence of species taxa within fragmented habitats is dependent on the source–sink metapopulation processes, and forest patch size and isolation are key factors. Unveiling species–patch area and/or species–patch isolation relationships may help provide crucial information for species and landscape... -
Diet of nesting African Crowned Eagles Stephanoaetus coronatus in emerging and forest–savanna habitats in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Gerard Malan --- Department of Nature Conservation, South Africa Eleen Strydom --- Department of Nature Conservation, South Africa Susanne Shultz --- Faculty of Life Sciences, UK Graham Avery --- Natural History Collections Department, South AfricaThe aim of this study was to investigate the species composition of prey caught in the forest, savanna and emerging habitats in which African Crowned Eagles Stephanoaetus coronatus breed in KwaZulu-Natal province, South Africa. At the 17 nest sites, the... -
Sexual size dimorphism and morphometric sexing in a North African population of Laughing Doves Spilopelia senegalensis
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tasnim Ayadi --- Département des Sciences de la Vie, Faculté des Sciences, Tunisia Abdessalem Hammouda --- Département des Sciences de la Vie, Faculté des Sciences, Tunisia Samia Kididi --- Laboratoire d’Elevage et Faune Sauvage, Tunisia Mohamed Habib Yahyaoui --- Laboratoire d’Elevage et Faune Sauvage, Tunisia Slaheddine Selmi --- Département des Sciences de la Vie, Faculté des Sciences, TunisiaLike the majority of Columbiformes, the Laughing Dove Spilopelia senegalensis is sexually monomorphic in plumage, but seems to be slightly dimorphic in size. However, due to the lack of studies little is known about the sexual size dimorphism in this... -
Strengthening HIV surveillance: measurements to track the epidemic in real time
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Usangiphile E Buthelezi --- Centre for the AIDS Programme of Research in South Africa (CAPRISA), Nelson R Mandela School of Medicine, South Africa Candace L Davidson --- Centre for the AIDS Programme of Research in South Africa (CAPRISA), Nelson R Mandela School of Medicine, South Africa Ayesha BM Kharsany --- Centre for the AIDS Programme of Research in South Africa (CAPRISA), Nelson R Mandela School of Medicine, South AfricaSurveillance for HIV as a public health initiative requires timely, detailed and robust data to systematically understand burden of infection, transmission patterns, direct prevention efforts, guide funding, identify new infections and predict future trends in the epidemic. The methods for... -
Diseases of eucalypts in the central and northern provinces of Mozambique
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sílvia ND Maússe-Sitoe --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa ShuaiFei Chen --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Michael J Wingfield --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Jolanda Roux --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South AfricaIn the mid-1970s, Mozambique embarked on several forestry projects to promote and establish large plantation areas with eucalypt trees. The planted species included Corymbia citriodora, Eucalyptus camaldulensis, E. saligna and E. tereticornis. Similar to other regions of the world, pests... -
Estimates of genetic parameters and genetic gains for growth traits of two Eucalyptus urophylla populations in Zululand, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Gert J van den Berg --- Mondi Forests (Pty) Ltd, South Africa Steven D Verryn --- Creation Breeding Innovations cc, South Africa Paxie W Chirwa --- School of Natural and Agricultural Sciences, South Africa Francois van Deventer --- Mondi Forests (Pty) Ltd, South AfricaIn South Africa, Eucalyptus urophylla is an important species due to its disease tolerance to fungal diseases such as Crysoporthe austroafricana and the Coniothyrium sp. cankers. It is mainly planted as a parental species in a hybrid combination with E... -
Remittances, mobile phones and informality: Insights from Cameroon
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nathanael Ojong --- Department of Business Administration, CanadaResearch on mobile phones abound. However, the use of the mobile phone as an informal value transfer mechanism has received little attention. This paper attempts to fill this lacuna in academic literature by focusing on the ‘why’ and ‘how’ of... -
Mitochondrial DNA sequence variation in Hippopotamus amphibius from Kruger National Park, Republic of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Richard Beckwitt --- Department of Biology, USA Jessica Barbagallo --- Department of Biology, USA Nickolas Breen --- Department of Biology, USA Julia Hettinger --- Department of Biology, USA Angelo Liquori --- Department of Biology, USA Cesar Sanchez --- Department of Biology, USA Nathalia Vieira --- Department of Biology, USA William Barklow --- Department of Biology, USAPopulations of Hippopotamus amphibius have declined throughout Africa in recent years, and are expected to decline further. An understanding of the population genetics of individual populations of hippos is necessary for effective management. To that end, we sequenced a portion... -
Genetic monitoring of ex situ African Penguin (Spheniscus demersus) populations in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Christiaan Labuschagne --- Department of Genetics, South Africa Lisa Nupen --- National Zoological Gardens of South Africa, South Africa Antoinette Kotzé --- Department of Genetics, South Africa J Paul Grobler --- Department of Genetics, South Africa Desiré L Dalton --- Department of Genetics, South AfricaThe African Penguin (Spheniscus demersus) has suffered population declines and is listed in the IUCN Red List as Endangered. The species is endemic to the coast of southern Africa, and breeding colonies are distributed on the south-western coast of Africa... -
A brief overview of the ACEP project: Ecosystem Processes in the KwaZulu-Natal Bight
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ST Fennessy --- Oceanographic Research Institute, South Africa MJ Roberts --- Branch: Oceans and Coasts, South Africa AW Paterson --- South African Institute for Aquatic Biodiversity, South AfricaThis introductory paper lays the basis for this supplementary issue by briefly presenting the state of knowledge on the KwaZulu-Natal (KZN) Bight at the start of this multi-disciplinary, multi-institutional, ship-based research project that ran from 2009 to 2013. The rationale... -
Summer and winter differences in zooplankton biomass, distribution and size composition in the KwaZulu-Natal Bight, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Pretorius --- University of the Western Cape, South Africa JA Huggett --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa MJ Gibbons --- University of the Western Cape, South AfricaZooplankton biomass and distribution in the KwaZulu-Natal Bight were investigated in relation to environmental parameters during summer (January–February 2010) and winter (July–August 2010). Mean zooplankton biomass was significantly higher in winter (17.1 mg dry weight [DW] m–3) than in summer... -
Species composition, abundance and biomass of microphytoplankton in the KwaZulu-Natal Bight on the east coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JS van der Molen --- Council for Scientific and Industrial Research, South Africa UM Scharler --- School of Life Sciences, South Africa D Muir --- Medgar Evers College, City University of New York, USANearshore marine environments are influenced by an array of variables that can either be land-derived or of marine origin, and nearshore phytoplankton communities may differ in their taxonomic composition and biomass in response to such variables. The KwaZulu-Natal Bight (hereafter... -
A seasonal comparison of prokaryote numbers, biomass and heterotrophic productivity in waters of the KwaZulu-Natal Bight, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Muir --- Medgar Evers College, USA T Kunnen --- School of Life Sciences, South Africa UM Scharler --- School of Life Sciences, South AfricaThe KwaZulu-Natal Bight is a shallow indentation of the eastern seaboard of South Africa, characterised by a narrow (45 km wide) extension of the continental shelf, with a shelf break at about 100 m. It has a complex hydrography: the... -
Riverine influence determines nearshore heterogeneity of nutrient (C, N, P) content and stoichiometry in the KwaZulu-Natal Bight, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: UM Scharler --- School of Life Sciences, South Africa MJ Ayers --- School of Life Sciences, South Africa AM de Lecea --- School of Life Sciences, South Africa M Pretorius --- Department of Biodiversity and Conservation Biology, South Africa ST Fennessy --- Oceanographic Research Institute, South Africa JA Huggett --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa CF MacKay --- Oceanographic Research Institute, South Africa D Muir --- Medgar Evers College, USARiverine influences on nearshore oceanic habitats often have detrimental consequences leading to algal blooms and hypoxia. In oligo- to mesotrophic systems, however, nutrient delivery via rivers may stimulate production and even be a vital source of nutrients, as may nutrient... -
The role of the district family physician
Item type: Journal Article • Journal: South African Family Practice • Authors: CH Vaughan-Williams --- Family Medicine, South AfricaDistrict clinical specialist teams were formed in 2012. One member of the team is the family physician. The role of the district family physician is discussed and the case made for focusing on the organisational health of the medical teams... -
Specialist physician-led public sector health services in rural KwaZulu-Natal: positive signs
Item type: Journal Article • Journal: South African Family Practice • Authors: Poobalan Naidoo --- Boehringer-Ingelheim, South Africa Diana Pillay --- Department of Internal Medicine, South Africa Selvarajah Saman --- Department of Internal Medicine, South AfricaMedical practice in public sector rural areas in South Africa has many challenges. This paper demonstrates the benefits of having specialist led medical services in rural medical facilities. -
Syphilis sero-positivity among pregnant women attending public antenatal clinics: A five-year analysis from 15 public clinics in Gaborone, Botswana
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: AB Ganiyu --- Faculty of Medicine, Department of Family Medicine, Botswana L Mason --- Department of Health and Life Sciences Programme, The Netherlands LH Mabuza --- Department of Family Medicine and Primary Health Care, South AfricaBackground: The prevalence of syphilis in pregnancy varies across the globe and among different age groups within the same country. In sub-Saharan Africa, syphilis prevalence among pregnant women has been found to range from 2.5 to 18% among antenatal clinic... -
Knowledge and perceptions of antimicrobial stewardship concepts among final year pharmacy students in pharmacy schools across South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Marisa Burger --- Department of Pharmacy, South Africa Jaco Fourie --- Department of Pharmacy, South Africa Devin Loots --- Department of Pharmacy, South Africa Tercia Mnisi --- Department of Pharmacy, South Africa Natalie Schellack --- Department of Pharmacy, South Africa Selente Bezuidenhout --- Department of Pharmacy, South Africa Johanna C Meyer --- Department of Pharmacy, South AfricaBackground: Antimicrobial stewardship is currently not mandatory as part of the undergraduate training of pharmacists. Identifying gaps in knowledge and a better understanding of pharmacy students’ perceptions about antimicrobial stewardship could assist in recommendations for appropriate changes to the pharmacy... -
Bottlenose dolphin Tursiops truncatus group dynamics, site fidelity, residency and movement patterns in the Madeira Archipelago (North-East Atlantic)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Dinis --- Madeira Whale Museum, Caniçal, Portugal F Alves --- Madeira Whale Museum, Caniçal, Portugal C Nicolau --- Madeira Whale Museum, Caniçal, Portugal C Ribeiro --- Madeira Whale Museum, Caniçal, Portugal M Kaufmann --- Centre of Life Sciences, Portugal A Cañadas --- ALNILAM – Research and Conservation, Spain L Freitas --- Madeira Whale Museum, Caniçal, PortugalThe bottlenose dolphin Tursiops truncatus is one of the most frequently sighted cetacean species in the Madeira Archipelago (North-East Atlantic); however, little is known about its population ecology in these waters. Photo-identification undertaken during systematic, non-systematic and opportunistic surveys conducted... -
Laboratory-scale evaluation of the potential of chemical containment for farmed abalone larval escapees
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Roux --- Department of Genetics, South Africa H Lambrechts --- Department of Animal Sciences, South Africa R Roodt-Wilding --- Department of Genetics, South AfricaThe sensitivity of abalone Haliotis midae larvae to low levels of toxicants was used to conduct a laboratoryscale experiment to determine the possibility of using chemical containment to prevent the escape of larvae from land-based culture systems, thereby reducing the... -
Physical activity and psychosomatic-related health problems as correlates of quality of life among university students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Stefan Kruger --- Tourism Research in Economic Environs and Society (TREES), Energy Sonono --- ‘Workwell’, South AfricaThis study aimed to investigate the role of psychosomatic problems in the relationship between physical activity and healthrelated quality of life. Participants were a convenience sample of 703 students from a South African university (males = 38.8%, females = 61.2%,... -
Correlates of illicit drug use among university students in Africa and the Caribbean
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- ASEAN Institute for Health Development, Mahidol University, Thailand Supa Pengpid --- ASEAN Institute for Health Development, Mahidol University, ThailandThe goal of this study was to estimate the prevalence and correlates of illicit drug use (IDU) among university students from eight countries in Africa and three countries in the Caribbean. In a cross-sectional survey, data were collected from 7... -
Degradation of paracetamol and other constituents in Perfalgan®
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Catherine Curran --- Department of Anaesthesia, South AfricaBackground: The manufacturers of Perfalgan®, a formulation of intravenous paracetamol, recommend that each ampoule be used once only. This is most likely due to concerns regarding degradation of paracetamol or other ingredients in the solution, and sterility issues. However, in... -
Constraints to public sphere activity in Joubert Park, Johannesburg
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Ingrid E. Marais --- Department of Anthropology and Archaeology, South AfricaThe link between public sphere and public space has long been established within the literature. Using three aspects of public sphere — plurality, public space and deliberate talk — I argue that the management choices that the City of Johannesburg... -
Reinscriptions of “stateless” socialities in South Africa: some thoughts on “Metropolitan nomads: a journey through Jo’burg’s ‘little Mogadishu’”
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Daniel K. Thompson --- Department of Anthropology, United States of AmericaIn this commentary, Daniel K. Thompson critically assesses Nereida Ripero-Muñiz and Salym Fayad’s photo essay, “Metropolitan Nomads: A Journey through Jo’burg’s ‘Little Mogadishu.’ The essay is published alongside this commentary. -
Evaluation of the effects of phosphorus and nitrogen source on aerial and subsoil parameters of maize (Zea mays L.) during early growth and development
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Pieter-Ernst Coetzee --- Department of Soil, Crop and Climate Sciences, South Africa Gert M Ceronio --- Department of Soil, Crop and Climate Sciences, South Africa Chris C du Preez --- Department of Soil, Crop and Climate Sciences, South AfricaUnderstanding the nutrient requirements of maize is especially important during early vegetative growth and development, particularly when produced on highly weathered soils with low organic matter contents. Therefore, the growth response of maize to different nitrogen (N) sources viz. limestone... -
Identification and molecular characterisation of Colletotrichum species from avocado, citrus and pawpaw in Ghana
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Joseph O Honger --- Soil and Irrigation Research Centre, School of Agriculture, College of Basic and Applied Sciences, Ghana Samuel K Offei --- Biotechnology Centre, College of Basic and Applied Sciences, Ghana Kwadwo A Oduro --- Department of Crop Science, School of Agriculture, College of Basic and Applied Sciences, Ghana George T Odamtten --- Botany Department, College of Basic and Applied Sciences, Ghana Seloame T Nyaku --- Department of Crop Science, School of Agriculture, College of Basic and Applied Sciences, GhanaOwing to previous identifications based solely on morphological characteristics, the identity of the causal agents of anthracnose disease of pawpaw and avocado in Ghana is in doubt. In addition, the pathogen has not been identified previously on citrus. In this... -
Wetland hydrology indicators of Maluti Mountains wetlands in Lesotho
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Botle E Mapeshoane --- Department of Soil, Crop and Climate Sciences, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Sciences, South AfricaHydric soil morphological features are generally accepted to be reliable indicators of wetland hydrology. The relationship between soil water saturation and soil morphological indices is evaluated in this study from bi-weekly water level data taken over a period of two... -
Sensitivity of selected dry bean (Phaseolus vulgaris L.) cultivars to mesotrione in a simulated carry-over trial
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: James Allemann --- Department of Soil, Crop and Climate Sciences, South Africa Johnny M Molomo --- Department of Soil, Crop and Climate Sciences, South AfricaMesotrione is used to control annual broadleaf weeds and grasses in maize, with waiting periods up to 24 months recommended prior to planting sensitive crops. The objectives of this study were to determine if selected dry bean cultivars exhibited differences... -
Effects of rooting media on root growth and morphology of Brassica rapa seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael O Adu --- Department of Ecological Sciences, UK David O Yawson --- Department of Soil Science, School of Agriculture, College of Agriculture and Natural Sciences, Ghana Frederick A Armah --- Department of Environmental Science, School of Biological Science, College of Agriculture and Natural Sciences, Ghana Paul A Asare --- Department of Crop Science, School of Agriculture, College of Agriculture and Natural Resources, Ghana Malcolm J Bennett --- Plant and Crop Sciences Division, School of Biosciences, UK Martin R Broadley --- Plant and Crop Sciences Division, School of Biosciences, UK Philip J White --- Department of Ecological Sciences, UK Lionel X Dupuy --- Department of Ecological Sciences, UKRooting media used in current root phenotyping studies can have substantial effect. In this study, the effects of three different nutrient conducting papers (Black construction paper, Anchor blue germination paper and Kimpak paper) and soil-filled boxes on root growth and... -
Subfossil diatoms from Hann Park pond, Dakar, Senegal: floristic inventory and palaeoenvironmental reconstruction
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: I Badiane --- Département de Géologie, Faculté des Sciences et Techniques, E Sow --- Département de Géologie, Faculté des Sciences et Techniques, CAK Fofana --- Département de Géologie, Faculté des Sciences et Techniques, C Aw --- Département de Géologie, Faculté des Sciences et Techniques,Diatoms in a 100 cm-long core from a pond in Hann Forest Park, western Senegal, were studied with the aim of reconstituting this interdune depression’s history, particularly the human influence, during the last century. Sixty-three species and varieties of diatoms... -
Name changes and additions to the southern African freshwater fish fauna
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PH Skelton --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaChanges made to the scientific names of southern African freshwater fishes since 2001 are explained and discussed. Adjustments to the phylogeny and classification of the fauna are outlined. Recent systematic studies on cyprinines are discussed and changes to the genera... -
Efficacy and deficiencies of rapid biomonitoring in biodiversity conservation: a case study in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HM Barber-James --- Department of Freshwater Invertebrates, South Africa LL Pereira-da-Conceicoa --- Department of Zoology and Entomology, South AfricaRapid biomonitoring protocols, using biotic indices based on macroinvertebrate diversity to assess river ecosystem health, are widely used globally. Such quick assessment techniques are lauded for the rapid results obtained and the relatively easy protocol used to achieve an answer... -
Antiretroviral adherence and virological outcomes in HIV-positive patients in Ugu district, KwaZulu-Natal province
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Germain Kapiamba --- Department of Health Studies, South Africa Thembekile Masango --- Department of Health Studies, South Africa Ditaba Mphuthi --- Department of Health Studies, South AfricaAdherence to antiretroviral therapy is crucial to ensure viral suppression. In the scientific community it is widely accepted that an adherence level of at least 90% is necessary to achieve viral suppression. This study uses pharmacy refill records to describe... -
Clinical correlates of suicidality among individuals with HIV infection and AIDS disease in Mbarara, Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Godfrey Zari Rukundo --- Department of Psychiatry, Uganda Eugene Kinyanda --- Department of Psychiatry, Uganda Brian Mishara --- Centre for Research and Intervention on Suicide and Euthanasia and Psychology Department, CanadaThe association between suicidality and HIV/AIDS has been demonstrated for three decades, but little is know about risk factors that can help understand this association and help identify who is most at risk. Few research studies have been conducted in... -
Teachers’ subjectivities and emotionality in HIV/AIDS teaching
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Jaqueline Naidoo --- School of Education, South Africa Peter Rule --- School of Education, South AfricaSchools play a significant role in conveying essential knowledge, skills and attitudes about HIV and AIDS to millions of learners, and are therefore at the forefront of addressing the HIV/AIDS pandemic. This has resulted in a shift in HIV/AIDS research... -
Adverse drug reactions associated with antiretroviral therapy in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Sumeshni Birbal --- School of Health Sciences, South Africa Mukesh Dheda --- School of Health Sciences, South Africa Elizabeth Ojewole --- School of Health Sciences, South Africa Frasia Oosthuizen --- School of Health Sciences, South AfricaSouth Africa has one of the highest prevalences of HIV and AIDS in the world. HIV/AIDS patients face countless challenges, one of which is the risk of adverse drug reactions (ADRs). This study aimed to describe the ADRs reported in... -
Morbidity and nutrition status of rural drug-naïve Kenyan women living with HIV
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Charlotte G Neumann --- David Geffen School of Medicine, USA Winstone Nyandiko --- USAID – Academic Model Providing Access to Healthcare (AMPATH) Partnership, Kenya Abraham Siika --- USAID – Academic Model Providing Access to Healthcare (AMPATH) Partnership, Kenya Natalie Drorbaugh --- Jonathan and Karin Fielding School of Public Health, USA Goleen Samari --- Jonathan and Karin Fielding School of Public Health, USA Grace Ettyang --- School of Public Health, College of Health Sciences, Kenya Judith A Ernst --- Indiana University School of Health & Rehabilitation Sciences, USAThis paper describes morbidity in a group of HIV-positive drug-naïve rural women in western Kenya. A total of 226 drug-naïve HIV-positive women were evaluated for baseline morbidity, immune function, and anthropometry before a food-based nutrition intervention. Kenyan nurses visited women... -
Sublittoral seaweed communities on natural and artificial substrata in a high-latitude coral community in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Gersun --- Department of Biological Sciences and Marine Research Institute, South Africa RJ Anderson --- Department of Biological Sciences and Marine Research Institute, South Africa JR Hart --- Oceanographic Research Institute, South Africa GW Maneveldt --- Department of Biodiversity and Conservation Biology, South Africa JJ Bolton --- Department of Biological Sciences and Marine Research Institute, South AfricaCoral mortality may result in macroalgal proliferation or a phase shift into an alga-dominated state. Subtidal, high-latitude western Indian Ocean coral communities at Sodwana Bay on the KwaZulu-Natal coast, South Africa, have experienced some mortality because of warm-water anomalies, storms... -
Cape cormorants decrease, move east and adapt foraging strategies following eastward displacement of their main prey
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Branch: Oceans & Coasts, Department of Environmental Affairs, South Africa RM Randall --- South African National Parks, South Africa TR Cook --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa BM Dyer --- Branch: Oceans & Coasts, Department of Environmental Affairs, South Africa R Fox --- Addo Elephant National Park, South African National Parks, South Africa D Geldenhuys --- CapeNature, Voëlklip, South Africa J Huisamen --- CapeNature, Voëlklip, South Africa C McGeorge --- CapeNature, Voëlklip, South Africa MK Smith --- South African National Parks, South Africa L Upfold --- Branch: Oceans & Coasts, Department of Environmental Affairs, South Africa J Visagie --- CapeNature, Scientific Services, Assegaaibosch Nature Reserve, South Africa LJ Waller --- CapeNature, Voëlklip, South Africa PA Whittington --- Department of Zoology, South Africa CG Wilke --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, South Africa AB Makhado --- Branch: Oceans & Coasts, Department of Environmental Affairs, South AfricaNumbers of Cape cormorants Phalacrocorax capensis breeding in South Africa decreased by nearly 50% from approximately 107 000 pairs in 1977–1981 to 57 000 pairs in 2010–2014. Although four colonies had >10 000 pairs in 1977–1981, there was just one... -
Stable isotope analysis of consumer food webs indicates ecosystem recovery following prolonged drought in a subtropical estuarine lake
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MS Bird --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa R Perissinotto --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa NAF Miranda --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa N Peer --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa JL Raw --- DST/NRF Research Chair in Shallow Water Ecosystems, South AfricaAssessing changes in food-web structure provides a useful monitoring tool for gauging the resilience of ecosystems in the face of climatic impacts. We consider the ecological resilience of a large estuarine lake (St Lucia Estuary, South Africa) in the wake... -
Determining the correct identity of South African Marthasterias (Echinodermata: Asteroidea)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AG Wright --- Department of Biological Sciences, South Africa R Pérez-Portela --- Center for Advanced Studies of Blanes (CEAB-CSIC), USA CL Griffiths --- Department of Biological Sciences, South AfricaMarthasterias glacialis are found in the cool-temperate waters of the north-eastern Atlantic Ocean, in the subtropical waters of the Mediterranean Sea and along the south-western tip of Africa. The South African Marthasterias population includes two morphotypes, a smooth, spineless rarispina... -
Skull size and shape variation in Psammomys spp. (Rodentia, Gerbillinae) from Tunisia, with emphasis on the impact of allometric variation on species recognition
Item type: Journal Article • Journal: African Zoology • Authors: Hanene Khemiri --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, Tunisia Paolo Colangelo --- CNR, Italy M’barek Chétoui --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, Tunisia Saïd Nouira --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, TunisiaIn Tunisia both Psammomys obesus and P. vexillaris are found. These taxa have been the subject of taxonomic controversy for some time, due to variability in the classical morphological characters used for taxonomic recognition. In this study we investigated skull... -
Validation of the periodicity of growth zone formation in the otoliths of four fish species from the Upper Zambezi ecoregion, southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Geraldine C Taylor --- South African Institute for Aquatic Biodiversity, South Africa Richard A Peel --- South African Institute for Aquatic Biodiversity, South Africa Clinton J Hay --- NNF/EU Community Conservation Fisheries in KAZA Project, Namibia Olaf LF Weyl --- South African Institute for Aquatic Biodiversity, South AfricaIn the Upper Zambezi and Okavango ecoregions, Brycinus lateralis, Hepsetus cuvieri, Schilbe intermedius and Serranochromis macrocephalus are important in subsistence fisheries, while S. intermedius and S. macrocephalus are often caught in commercial catches. Despite their importance, there is little information... -
Geographically widespread mitochondrial lineages of the African saw-wings inconsistent with species boundaries
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Lisa N Barrow --- Department of Biological Science, USA Desiré L Dalton --- National Zoological Gardens of South Africa, South Africa Antoinette Kotzé --- National Zoological Gardens of South Africa, South Africa Steven W Evans --- SARCHI Chair on Biodiversity Value and Change, School of Mathematical and Natural Sciences, South AfricaThe African saw-wings (genus Psalidoprocne) are a group of swallows endemic to sub-Saharan Africa. Although currently described as five species with several subspecies, the taxonomy of the saw-wings is unclear. We sequenced two mitochondrial genes (ND2 and cytb; 1 717... -
Birds and biogeography of Mount Mecula in Mozambique’s Niassa National Reserve
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Claire N Spottiswoode --- Department of Zoology, UK Lincoln DC Fishpool --- BirdLife International, UK Julian L Bayliss --- Department of Zoology, UKThe montane forests of northern Mozambique’s isolated massifs are inhabited by numerous range-restricted and threatened bird species, but until recently were extremely little-known. We report on a first avifaunal survey of the isolated montane habitats of Mt Mecula (1 442... -
Epidemiology of cystic fibrosis respiratory pathogens isolated at a South African Hospital, 2006–2010
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Vindana Chibabhai --- National Health Laboratory Service (NHLS), Department of Clinical Microbiology and Infectious Diseases, South Africa Warren Lowman --- Department of Clinical Microbiology and Infectious Diseases, South AfricaBackground: The epidemiology of cystic fibrosis (CF) associated pathogens other than Pseudomonas aeruginosa in the South African cystic fibrosis population has not been previously described. -
Interferon alpha in subacute sclerosing panencephalitis: Case report and review of the literature
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: K Moodley --- Department of Neurology, South Africa PLA Bill --- Department of Neurology, South Africa VB Patel --- Department of Neurology, South AfricaSubacute Sclerosing Panencephalitis (SSPE) is a rare, rapidly progressive neurodegenerative disease caused by the measles virus. Spontaneous remission and survival longer than 4 years is rare. The disease commonly affects children and adolescents from less privileged socio-economic backgrounds. Prior to immunisation,... -
Dispensing patterns of prescription-only antiobesity preparations in South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Ilse Truter --- Drug Utilization Research Unit (DURU), Department of Pharmacy, South AfricaObjectives: The aim of the study was to investigate the dispensing patterns of prescription-only antiobesity preparations in South Africa (classified as Anatomical Therapeutic Chemical (ATC) group A08). -
Dispensing of vitamin products by retail pharmacies in South Africa: Implications for dietitians
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Ilse Truter --- Department of Pharmacy, South Africa Liana Steenkamp --- HIV & AIDS Research Unit, Nelson Mandela Metropolitan University, South AfricaObjective: The objective of this study was to analyse the dispensing patterns of vitamins (Anatomical Therapeutic Chemical (ATC) group A11) over a one-year period in a group of community pharmacies in South Africa. -
South African indigenous fruits – Underutilized resource for boosting daily antioxidant intake among local indigent populations?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Daniela Amalia Kucich --- Department of Chemistry, South Africa Merrill Margaret Wicht --- Department of Chemistry, South AfricaConsuming more than seven portions of fruit and vegetables daily substantially lowers the risk of mortality from any cause, yet many South Africans living below the poverty line have a very low or even zero intake of fruit and vegetables... -
Physical and hydrological properties of peatland substrates from different hydrogenetic wetland types on the Maputaland Coastal Plain, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Franziska Faul --- Faculty of Earth and Environmental Sciences, Germany Marvin Gabriel --- Faculty of Life Science, Germany Niko Roßkopf --- Faculty of Life Science, Germany Jutta Zeitz --- Faculty of Life Science, Germany Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Sciences, South Africa Mathilde L Pretorius --- Centre for Environmental Management, South Africa Piet-Louis Grundling --- Centre for Environmental Management, South AfricaThe Maputaland Coastal Plain in KwaZulu-Natal province is home to 60% of all peatlands occurring in South Africa. These ecosystems are increasingly threatened by unsustainable agricultural utilisation, a growing population and climate change. The aim of the study was, therefore,... -
Quantification of primary salinity, sodicity and alkalinity in South African soils using climate regions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J Piet Nell --- Agricultural Research Council–Institute for Soil, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Science, South AfricaNo reliable primarily salinity, sodicity and alkalinity information is available for South Africa, nor are there monitoring programs in place to track the salt-affected status of South African soils. Such information is, however, needed for various agricultural and environmental studies... -
Effect of integrated soil bunds on key soil properties and soil carbon stock in semi-arid areas of northern Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Birhane Tadesse --- Natural Resource Management, Bureau of Agriculture and Rural Development, Ethiopia Shimbahri Mesfin --- Department of Land Resource Management and Environmental Protection, Ethiopia Girmay Tesfay --- Department of Natural Resource Economics and Management, Ethiopia Fetien Abay --- Department of Dryland Crop and Horticultural Science, EthiopiaLand degradation is a serious global problem. To reclaim degraded land, many soil bunds have been implemented. However, their effectiveness has not been studied in all regions of Ethiopia. The objective of this study was to investigate the effect of... -
Sedation for paediatric auditory electrophysiology in South Africa
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: S Moodley --- Centre for Deaf Studies, South Africa C Storbeck --- Centre for Deaf Studies, South AfricaBackground: The sedation of children in the medical and allied professional fields has been a topic of controversy and debate internationally. Limited information is available on the use of sedation for auditory electrophysiology testing in South Africa. -
Microbial contamination and labelling of self-prepared, multi-dose phenylephrine solutions used at a teaching hospital
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Andreas van den Heever --- Faculty of Health Sciences, Department of Anaesthesiology, South Africa Juan Scribante --- Faculty of Health Sciences, Department of Anaesthesiology, South Africa Helen Perrie --- Faculty of Health Sciences, Department of Anaesthesiology, South Africa Warren Lowman --- Vermaak and Partners Pathologists, South AfricaBackground: Common practice at Chris Hani Baragwanath Academic Hospital (CHBAH) is to use boluses from a self-prepared, multi-dose phenylephrine solution to treat spinal anaesthesia-induced hypotension in patients undergoing a Caesarean section. The aims of this study were to determine if... -
Modelling photovoltaic modules by a numerical method and artificial neural networks
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Zahra Meziani --- Department of Electronics, Faculty of Technology, Algeria Zohir Dibi --- Department of Electronics, Faculty of Technology, AlgeriaThis paper proposes modelling approaches for photovoltaic (PV) modules with a fast and simple numerical method of modelling, the Newton–Raphson method, as the first step. This method has several electric circuit models. We selected and tested the two most convincing... -
Leadership and governance: learning outcomes and competencies required of the family physician in the district health system
Item type: Journal Article • Journal: South African Family Practice • Authors: R Mash* --- Division of Family Medicine and Primary Care, South Africa J Blitz --- Division of Family Medicine and Primary Care, South Africa Z Malan --- Division of Family Medicine and Primary Care, South Africa K Von Pressentin --- Division of Family Medicine and Primary Care, South AfricaThe South African National Development Plan expects the family physician to be a leader of clinical governance within the district health services. The family physician must also help to strengthen the services through leadership in all his/her other roles as... -
A reflection on the practical implementation of the clinical governance framework in the Cape Winelands District of the Western Cape
Item type: Journal Article • Journal: South African Family Practice • Authors: Colette Gunst --- , South Africa Robert J Mash --- Department of Family Medicine and Primary Care, South Africa Lizette Cathleen Phillips --- , South AfricaPrimary health care is seen as the ‘linchpin of effective health care delivery’ by the Western Cape Government Health services and improving the quality of primary care, through clinical governance, is a key aspect of realising this vision. This article... -
Re-engineering of South Africa’s primary health care system: where is the pharmacist?
Item type: Journal Article • Journal: South African Family Practice • Authors: A. Bheekie --- School of Pharmacy, South Africa H. Bradley --- School of Public Health, South AfricaSouth Africa’s transition towards a district-based health system (DHS) aims to offer health promotion and prevention services at community level, through re-engineered primary health care (PHC) services. Along with pharmacy workforce shortages and service delivery challenges, health reform is a... -
The Illusion of Truth in Three Kenyan Crime Novels
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Larry Ndivo --- Department of Linguistics & Languages, KenyaFocusing on crime autobiography in Kenya, this article reads John Kiriamiti’s three novels, My Life in Crime (1984), My Life with a Criminal: Milly’s Story (1989) and My Life in Prison (2004) to argue that although the writer adopts confession... -
Water quality of the Luvuvhu River and its tributaries within the Thulamela Local Municipality, Limpopo Province, South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mpho Monyai --- Department of Environmental Sciences, South Africa Rudzani A. Makhado --- Department of Environmental Sciences, South Africa Ntshenge O. Novhe --- Council for Geoscience, South AfricaThe study was conducted during dry and wet periods at the Luvuvhu River and its tributaries within the Thumalamela Local Municipality, Limpopo Province, South Africa. A total of 50 samples (25 per sampling session) were collected for physicochemical analysis at... -
Marriage, kinship and childcare in the aftermath of AIDS: rethinking “orphanhood” in the South African lowveld
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Isak Niehaus --- Anthropology Division, United KingdomIn this article I consider the significance of marriage from the vantage point of children’s affiliation to domestic units during the era of South Africa’s AIDS pandemic. Drawing on multi-temporal fieldwork in Impalahoek, a village in the Bushbuckridge municipality of... -
Prevalence and behavioural risk factors of light or moderate and heavy cigarette smoking in 32 countries
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- ASEAN Institute for Health Development, Thailand Karl Peltzer --- ASEAN Institute for Health Development, ThailandThe aim of this study was to predict the prevalence of light or moderate and heavy smoking from lifestyle behavioural risk factors among South African adults compared to others from 31 countries around the world. Secondary data from 53 391... -
Harmful cyanobacteria and their cyanotoxins in Egyptian fresh waters – state of knowledge and research needs
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ZA Mohamed --- Department of Botany and Microbiology, Faculty of Science, EgyptCyanobacterial blooms have increased in freshwater ecosystems worldwide in the last century, mostly resulting from eutrophication and climate change. These blooms represent serious threats to environmental and human health because of the production of harmful metabolites, called cyanotoxins. Like many... -
First record of a spiral form of Aulacoseira, A. ambigua f. japonica (F.Meister) Tuji & D.M.Williams, in South African fresh waters
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Janse van Vuuren --- Unit for Environmental Sciences and Management, North-West University, South Africa JC Taylor --- Unit for Environmental Sciences and Management, North-West University, South AfricaWater quality and algal populations in the Vaal River Barrage Reservoir have been monitored extensively for many decades, because of its importance as a water source for the most densely populated area in South Africa. Although Aulacoseira granulata (Ehrenberg) Simonsen... -
Could the elongate yellow-orange nostrils of Anguilla bicolor McClelland, 1844 function as fishing lures?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Tweddle --- South African Institute for Aquatic Biodiversity, South Africa PH Skelton --- South African Institute for Aquatic Biodiversity, South AfricaThe shortfin eel Anguilla bicolor has elongate, yellow nostrils tipped with orange that protrude forward above the mouth. They are a striking, highly visible feature and it is hypothesised that they function as lures to attract prey, analogous to the... -
First report of metazoan parasites from the cichlid Pseudocrenilabrus philander and the cyprinid Enteromius paludinosus in a South African Ramsar wetland
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Truter --- Water Research Group, Unit for Environmental Sciences and Management, South Africa I Přikrylová --- Water Research Group, Unit for Environmental Sciences and Management, South Africa W Malherbe --- Water Research Group, Unit for Environmental Sciences and Management, South Africa NJ Smit --- Water Research Group, Unit for Environmental Sciences and Management, South AfricaParasites of two small fish species from a Ramsar wetland in South Africa were studied in 2014–2015. The cichlid Pseudocrenilabrus philander (Weber, 1897) was parasitised by the copepod Lernaea cyprinacea Linnaeus, 1758, the monogenean Gyrodactylus thlapi Christison, Shinn & van... -
First report of cyanobacterial diversity and microcystins in a Microcystis
strain from Sidi Boughaba, a Moroccan coastal lagoon Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Douma --- Department of Biology, Laboratory of Biology and Biotechnology of Microorganisms, N Manaut --- Health and Environment Unit, Provincial Direction of the Ministry of National Education, Morocco B Oudra --- Department of Biology, Laboratory of Biology and Biotechnology of Microorganisms, M Loudiki --- Department of Biology, Laboratory of Biology and Biotechnology of Microorganisms,The cyanobacterial diversity of Sidi Boughaba, a Moroccan coastal lagoon and Ramsar site, was evaluated and its potentially toxic species were isolated and characterised. This study was the first time that cyanobacterial diversity and cyanotoxin production have been characterised in... -
Using stable isotope analysis to study the diet of Gilchristella aestuaria larvae: preliminary insights into the foodwebs of six South African estuaries
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Costalago --- Department of Ecology, Environment and Plant Sciences, Sweden NAF Miranda --- DST/NRF Research Chair in Shallow Water Ecosystems, Department of Zoology, South Africa NA Strydom --- Department of Zoology, South Africa R Perissinotto --- DST/NRF Research Chair in Shallow Water Ecosystems, Department of Zoology, South AfricaSouth African estuarine systems are becoming increasingly altered by anthropogenic and environmental factors, but the consequences of such changes for these systems are still not fully understood. The most common approach for evaluating the ecological status of aquatic systems is... -
Stress steroid levels and the short-term impact of routine dehorning in female southern white rhinoceroses (Ceratotherium simum simum)
Item type: Journal Article • Journal: African Zoology • Authors: Marcha Badenhorst --- Endocrine Research Laboratory, Department of Anatomy and Physiology, South Africa Michelle Otto --- Buffalo Dream Ranch Wildlife Veterinary Services, South Africa Annemieke C van der Goot --- Lapalala Wilderness, South Africa André Ganswindt --- Endocrine Research Laboratory, Department of Anatomy and Physiology, South AfricaRhinoceros populations in Africa are under severe threat as a result of surging poaching rates and risk-mitigation strategies are continuously adapted in an attempt to ensure the survival of the species. This study compared faecal glucocorticoid metabolite (fGCM) levels of... -
Selective predation and prey class behaviour as possible mechanisms explaining cheetah impacts on kudu demographics
Item type: Journal Article • Journal: African Zoology • Authors: Douglas F Makin --- Centre for African Conservation Ecology, South Africa Graham IH Kerley --- Centre for African Conservation Ecology, South AfricaA number of predator–prey studies show that certain prey demographic classes are targeted over others. The possible mechanisms driving these effects can be two-fold. Firstly, a preference for a certain demographic class results in selective predation by a predator. Secondly,... -
Disentangling the identities and distribution patterns of the introduced beachfleas Orchestia gammarellus and Platorchestia platensis (Crustacea: Amphipoda: Talitridae) in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Natalie Diemer --- Department of Biological Sciences and Centre for Invasion Biology, South Africa Charles L Griffiths --- Department of Biological Sciences and Centre for Invasion Biology, South Africa Alan Hodgson --- Department of Zoology and Entomology, South AfricaTwo introduced beachfleas, Orchestia gammarellus and Platorchestia platensis, have been recorded from South Africa, but have been misidentified by some earlier researchers and, prior to this study, each was also known from just a few, scattered observations, such that their... -
Otolith shape as a valuable tool to evaluate the stock structure of swordfish Xiphias gladius in the Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Mahé --- Ifremer, Laboratoire Ressources Halieutiques, France H Evano --- Ifremer, Délégation Océan Indien, France T Mille --- Ifremer, Laboratoire Ressources Halieutiques, France D Muths --- Université Européenne de Bretagne, France J Bourjea --- , FranceSwordfish Xiphias gladius is an oceanic-pelagic species. Its population structure in the Western Indian Ocean was studied from the shape of the sagittal otoliths of 391 individuals collected from 2009 to 2014. Normalised elliptical Fourier descriptors (EFDs) were extracted automatically... -
Absence of an effect of freshwater input on the stable isotope and fatty acid signatures of intertidal filter-feeders
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Puccinelli --- Department of Zoology and Entomology, South Africa CD McQuaid --- Department of Zoology and Entomology, South Africa M Noyon --- Department of Zoology and Entomology, South AfricaFreshwater input is known to have the potential to influence marine pelagic and benthic communities through the export of nutrients, sediments and detritus. The increase in nutrients of riverine origin in coastal environments can enhance primary production in coastal areas,... -
Phylogeography of the pelagic fish Seriola lalandi at different scales: confirmation of inter-ocean population structure and evaluation of southern African genetic diversity
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BL Swart --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa AE Bester-van der Merwe --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa SE Kerwath --- Department of Agriculture, South Africa R Roodt-Wilding --- Molecular Breeding and Biodiversity Group, Department of Genetics, South AfricaThe study investigated the global and regional phylogeography of the yellowtail kingfish Seriola lalandi by examining genetic diversity and population genetic structure of this species at inter-and intra-ocean level and on a regional scale. DNA fragments of two mitochondrial genes,... -
Nutrient limitation in two marine diatoms inhibits release of bromoform
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Nguvava --- Department of Oceanography, South Africa B Kuyper --- Department of Oceanography, South Africa E Bucciarelli --- Department of Oceanography, South Africa H Waldron --- Department of Oceanography, South Africa C Palmer --- Applied Centre for Climate and Earth Systems Science, CSIR, South AfricaBromoform released from phytoplankton and kelp in the ocean is the largest known carrier of bromine to the atmosphere. The photoproducts of atmospheric bromoform catalyse ozone depletion. Laboratory investigations were conducted into the link between nutrient limitation and bromoform production... -
Livestock grazing has minimal effect on the species richness and diversity of semi-arid shrubland in the Western Little Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Nelmarie Saayman --- Directorate of Plant Sciences, Western Cape Department of Agriculture, South Africa Craig Morris --- Agricultural Research Council–Livestock Business Division, Range and Forage Unit, c/o School of Biological and Conservation Sciences, South Africa Hannes Botha --- Directorate of Plant Sciences, Western Cape Department of Agriculture, South AfricaThe Succulent Karoo, one of two arid biodiversity hotspots in the world, is known for its high plant species richness, but little is known about the influence of topography and how it mediates the potentially deleterious effects of grazing. Changes... -
Is there a trade-off in resource allocation to condensed tannins and thorn defences in Vachellia (Acacia) species?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Allan Sebata --- Department of Forest Resources and Wildlife Management, ZimbabweAcacia species invest in condensed tannins (CT) and thorn defences among others. Plant defences are considered costly because they use resources that would otherwise be available for growth and reproduction. To reduce plant defence costs it has been argued that... -
Growth and nutritional qualities of three ocimum species as affected by methods of propagation
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: A. I. Okunlola --- Department of Crop, Soil and Pest Management, Nigeria O. C. Ogungbite --- Department of Biology, Nigeria G. F. Hassan --- Department of Crop, Soil and Pest Management, NigeriaOcimum species are well known for their medicinal values and this has increased demand from individuals and the pharmaceutical industry. In order to meet the demand for this plant species three different Ocimum species (Ocimum basilicum, Ocimum gratissimum and Ocimum... -
Child factors associated with complementary feeding practices in Uganda
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Alex Mokori --- Institute of Food, Nutrition and Well-being, University of Pretoria, Uganda Hettie Schonfeldt --- Institute of Food, Nutrition and Well-being and Department of Animal and Wildlife Sciences, South Africa Sheryl L Hendriks --- Institute of Food, Nutrition and Well-being and Department of Agricultural Economics, Extension and Rural Development, South AfricaObjectives: The objective of the study was to identify child factors that influenced complementary feeding practices in 2006 and 2011 in Uganda. -
Improved usefulness of continental soil databases for agricultural management through local adaptation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mats Söderström --- International Center for Tropical Agriculture (CIAT), Kenya Kristin Piikki --- International Center for Tropical Agriculture (CIAT), Kenya Jeremy Cordingley --- Crop Nutrition Laboratory Services Ltd, KenyaThe usefulness of a continental digital soil map (AfSoilGrids250) was investigated at two levels relevant for agricultural fertiliser recommendations in Rwanda (point locations and administrative sector unit averages). Analysis of 900 soil samples for pH and soil organic carbon (SOC)... -
Effect of phosphorus and nitrogen sources on essential nutrient concentration and uptake by maize (Zea mays L.) during early growth and development
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Pieter-Ernst Coetzee --- Department of Soil, Crop and Climate Sciences, South Africa Gert M Ceronio --- Department of Soil, Crop and Climate Sciences, South Africa Chris C du Preez --- Department of Soil, Crop and Climate Sciences, South AfricaIn South Africa, maize is often produced on highly weathered soils with low organic matter contents. These soils are unable to supply sufficient nitrogen (N) and phosphorus (P) for sustainable maize production, resulting in the use of fertiliser sources containing... -
Music as an environmental factor in hospitality: what is the impact of background music on perceived atmosphere and sales in a school cafeteria?
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Theresa Vitera --- Stenden Hotel Management School, The Netherlands Rebeka Barbara Keresztes --- Stenden Hotel Management School, The NetherlandsExtending the research of North and Hargreaves (1998)1, this study investigates the influence of three different musical styles, namely lounge, pop and jazz on perceived atmosphere and sales in a school cafeteria. Interviews and questionnaires were conducted to acquire information... -
The cosmological aspects of food in the material world
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Joseph Hegarty --- Sheffield Business School, Sheffield Hallam University, UKThere is a general tendency today to believe that all truth worth knowing is to be found in the various branches of the physical sciences. If this were so, there could be no place for a philosophy of matter, or... -
Comparative and theoretical framework of Brazilian hospitality studies
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Elizabeth K. Wada --- School of Hospitality and Tourism, Anhembi Morumbi University, Brazil Airton José Cavenaghi --- School of Hospitality and Tourism, Anhembi Morumbi University, Brazil Maria do Rosário Rolfsen Salles --- School of Hospitality and Tourism, Anhembi Morumbi University, BrazilThe purpose of this article is to give a summary of the bibliographical production of the first publications made by the Master's Programme in Hospitality at the Anhembi Morumbi University, Sã;o Paolo, the compilations edited by Célia Maria de Moraes... -
Hospitableness and sustainable development: New responsibilities and demands in the host-guest relationship
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Arjan van Rheede --- Research Centre, Hotelschool, The Netherlands Daphne Maria Dekker --- Research Centre, Hotelschool, The NetherlandsHow does the current paradigm of the host-guest relationship cause the hospitality industry to lag behind in sustainable development? Hospitality is often defined as “a feeling of being welcome”. It is about “welcoming the stranger: a person who comes today... -
The power of research in finance to enhance sustainability – Applied to practice
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Gernot Peichl --- Hilton Tallinn Park, Accounting and Finance Department, EstoniaMany people think of research in the hospitality industry as being difficult to relate to practice. This paper shows not only how theory can be applied to practice, but also how practice is related to theory with regard to concepts... -
A review of the genus Homopholis Boulenger (Reptilia: Squamata: Gekkonidae) in southern Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Donald G. Broadley --- , Zimbabwe Todd R. Jackman --- , , USA Aaron M. Bauer --- , , USAOn the basis of molecular data, the gekkonid lizard Homopholis arnoldi Loveridge is revived as a full species. Morphologically it is usually distinguishable from H. wahlbergii on the basis of its striped dorsal colour pattern. Homopholis arnoldi has a wide... -
Laryngotracheal and cervical muscular anatomy in the genus Uroplatus (Gekkota: Gekkonidae) in relation to distress call emission
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Anthony P. Russell --- , , Canada Heather A. Hood --- , , Canada Aaron M. Bauer --- , , USAThe gekkonid Uroplatus exhibits many autapomorphic features. The laryngotracheal region has long been noted to display unusual characteristics, with a widely expanded and membrane-roofed anterior portion of the trachea being prominent among these. It has been proposed that this tracheal... -
Phenotypic variability in larvae of two species of Mediterranean spadefoot toad: an approach using linear and geometric morphometrics
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Daniel Escoriza --- , , Spain Jihène Ben Hassine --- , , TunisiaTwo species of the genus Pelobates occur in the western Mediterranean region: Pelobates cultripes, in the Iberian Peninsula and southern France, and Pelobates varaldii, endemic in northwestern Morocco. These two species form a monophyletic clade within the Eurasian Pelobates and... -
The phylogenetic position of Ethiopia's sole endemic and biogeographically enigmatic cordylid lizard, Cordylus rivae (Squamata: Cordylidae), and a discussion of its conservation status
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Stuart V. Nielsen --- , , USA Timothy J. Colston --- , , USAAlthough the genus Cordylus has received much recent attention, previous studies have failed to include all known species, particularly for biogeographically important taxa. Recent fieldwork targeted a previously known population of Cordylus rivae from the southeast of Ethiopia's Oromia region... -
Cryptic variation in the Moroccan high altitude lizard Atlantolacerta andreanskyi (Squamata: Lacertidae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mafalda Barata --- , , Portugal Ana Perera --- , , Portugal D. James Harris --- , , PortugalAtlantolacerta andreanskyi is a mountain specialist lacertid lizard, restricted to areas above 2400 m of the High Atlas Mountains of Morocco, with apparently no geographic connection between different populations. In a recent molecular study, populations from A. andreanskyi collected across... -
Occurrence and ecological aspects of the two-fingered skink Chalcides mauritanicus in the Chafarinas Islands in North Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: José Martín --- , , Spain Roberto García-Roa --- , , Spain Jesús Ortega --- , , Spain Pilar López --- , , Spain Ana Pérez-Cembranos --- , , Spain Alicia León --- , , Spain Luis V. García --- , , Spain Valentín Pérez-Mellado --- , , SpainThe two-fingered skink, Chalcides mauritanicus, is a fossorial species from North Africa, where it has only been found at a few localities on sandy sea shores. Virtually nothing is known about its ecology. For the first time, we report the... -
Two new species of long-fingered frogs of the genus Cardioglossa (Anura: Arthroleptidae) from Central African rainforests
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mareike Hirschfeld --- , , Germany David C. Blackburn --- , USA Marius Burger --- , , South Africa Eli Greenbaum --- , , USA Ange-Ghislain Zassi-Boulou --- , République du Congo Mark-Oliver Rödel --- , , GermanyWe describe two new frog species of Cardioglossa (Family Arthroleptidae) from Central Africa. The new species are found in the rainforests of western-central Democratic Republic of the Congo and the Republic of the Congo near the Gabonese border, respectively. We... -
Sexual size dimorphism in a Tunisian population of Bosk's fringe-toed lizards Acanthodactylus boskianus asper
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Intissar Nasri --- , , Tunisia Abdessalem Hammouda --- , , Tunisia Foued Hamza --- , , Tunisia Slaheddine Selmi --- , , TunisiaInvestigating how patterns of sexual size dimorphism vary among local populations may be useful for understanding size evolution in lizards. We investigated patterns of sexual size dimorphism in a Tunisian population of Bosk's fringe-toed lizards Acanthodactylus boskianus asper, in relation... -
Annual variation of ovarian structures of Boulengerula taitana (Loveridge 1935), a Kenyan caecilian
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: M. A. Raquet --- , , France G. J. Measey --- , , South Africa J. M. Exbrayat --- , , FranceThe Kenyan caecilian, Boulengerula taitanus inhabits a climate characterised by two distinct dry and wet seasons, and a single thermal minimum in June. It is oviparous with direct development and a remarkable dermatophagous maternal care, but the female reproductive cycle... -
A comparison of DNA barcoding markers in West African frogs
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Heidi J. Rockney --- , , USA Caleb Ofori-Boateng --- , Ghana Natsuko Porcino --- , , USA Adam D. Leaché --- , , USADNA barcoding has been proposed as a means of quick species identification using a short standardised segment of DNA. The established barcode gene for animals—the mitochondrial gene cytochrome oxidase one (CO1)—has been plagued by primer failure and low species identification... -
Sexual dimorphism in morphological traits and scaling relationships in two populations of Gallotia stehlini (Fam. Lacertidae: Squamata) from Gran Canaria
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Cristina Rivero Suárez --- , , Spain Miguel Angel Rodríguez-Domínguez --- , Miguel Molina-Borja --- , , SpainLizards of the genus Gallotia, endemic to the Canary Islands, show morphological and colouration varieties that are related to within island variation in orographic and climatic characteristics. This study examines sexual size dimorphism (SSD) within and between population variation in... -
On the taxonomic status of two enigmatic southern African fossorial skinks, Scelotes bicolor and S. schebeni
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Aaron M. Bauer --- , , USAThe nominal taxa Scelotes bicolor and Scelotes schebeni are known only from their respective type specimens, both now lost, and they have been regarded as species inquirendae. A review of available data confirms that earlier synonymisations with S. arenicola and... -
Wide variation in carapacial scute patterns in a natural population of speckled tortoises, Homopus signatus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Victor J.T. Loehr --- , NetherlandsThe arrangement of scutes on the carapaces of extant chelonians is very similar among species, but intraspecific deviations from typical scute patterns are common. Because intraspecific variation may relate to inbreeding depression, unfavourable egg incubation conditions and the presence of... -
A new species of Zygaspis (Reptilia: Squamata: Amphisbaenidae) from north-eastern Mozambique
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Donald G. Broadley --- , , Zimbabwe G. John Measey --- , , South AfricaWe describe a new species of Zygaspis based on a single specimen collected in north-eastern Mozambique and deposited in the Natural History Museum of Zimbabwe, Bulawayo. The new species is characterised by its extensively black pigmentation, 191 body annuli, discrete... -
Analysis of genetic diversity in Rose’s mountain toadlet (Capensibufo rosei) using novel microsatellite markers
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jessica M. da Silva --- , South Africa Kevin A. Feldheim --- , USA Ryan J. Daniels --- , South Africa Shelley Edwards --- , South Africa Krystal A. Tolley --- , South AfricaOn the Cape Peninsula, Capensibufo rosei is known from only two isolated breeding populations within Table Mountain National Park. Because of its declining state, there is an urgent need to understand the genetic diversity, population structure and patterns of movement... -
Variation in body size and morphometric traits of males and females of the wall gecko, Tarentola delalandii (Phyllodactylidae) from different environments on Tenerife
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: María de Fuentes-Fernández --- , Spain María Mercedes Suárez-Rancel --- , , Spain Miguel Molina-Borja --- , SpainWe analysed sexual dimorphism in body size and several other morphological traits of two populations of Tarentola delalandii on the island of Tenerife (San Cristóbal de La Laguna in the North, and Granadilla de Abona in the South), whose habitats... -
Resources for resilient caregiving by parents of children with schizophrenia in Swaziland: A multiple case study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Kayi Ntinda --- Department of Educational Foundations and Management, Swaziland Siphesihle Nkwanyana --- Department of Educational Foundations and Management, SwazilandThis study reports on the care-provisioning experiences of parents (n = 6; females = 5) raising children with schizophrenia in a rural Swazi setting. The parents were individually interviewed at their homes on caregiving aspects such as burden, coping, quality... -
The eventual outcome of patients who had lower limb amputations due to peripheral vascular disease at Pelonomi Hospital, Bloemfontein
Item type: Journal Article • Journal: South African Family Practice • Authors: C De Klerk --- Faculty of Health Sciences, School of Medicine, South Africa G Du Plessis --- Faculty of Health Sciences, School of Medicine, South Africa JJ Fourie --- Faculty of Health Sciences, School of Medicine, South Africa A O’Neill --- Faculty of Health Sciences, School of Medicine, South Africa SJA Smit --- Faculty of Health Sciences, Department of Surgery, South Africa G Joubert --- Faculty of Health Sciences, Department of Biostatistics, South AfricaBackground: Peripheral vascular disease (PVD) presenting with irreversible lower limb pathology has a high morbidity and mortality rate. This study aimed to determine the outcome of patients who underwent lower limb amputations (LLAs) because of PVD at Pelonomi Hospital, Bloemfontein,... -
Writing (as) Africans — French Fiction Between Empathy and Orientalism
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Oana Panaïté --- Department of French and Italian, United StatesThis article examines the impact colonial ideology and discursive practices have on French writing about Africa. I begin by examining the constitution and reiteration of a series of defining scenes such as the momentous departure for the African colonies and... -
Things Fall Apart and the Pedagogy of Adichie’s Single Story
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Eve Eisenberg --- English Department, USAThis essay undertakes a critical examination of the epistemological and pedagogical risks and rewards of teaching Chinua Achebe’s Things Fall Apart in American secondary schools. I consider these issues from several different viewpoints. Recent research suggests that American students receive... -
Genetic diversity within two Tunisian wild jirds: Meriones shawi and Meriones libycus (Rodentia, Gerbillinae)
Item type: Journal Article • Journal: African Zoology • Authors: Hanene Khemiri --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, Tunisia João Pimenta --- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal António Amorim --- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal Pascale Chevret --- Laboratoire de Biométrie et Biologie Evolutive – UMR CNRS 5558, France Saïd Nouira --- Laboratory of Animal Ecology, Department of Biology, Sciences Faculty of Tunis, Tunisia Alexandra M Lopes --- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, PortugalThree Meriones species inhabit Tunisia, namely M. shawi, M. libycus and M. crassus, but little genetic data exist on these gerbils. We collected Meriones from eight localities in Tunisia, and obtained mitochondrial (cytochrome b) and nuclear (IRBP) gene sequence data... -
Morphological variation in the Sabota Lark Calendulauda sabota in southern Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Sean M Marr --- Department of Biodiversity, South Africa Mmatjie L Mashao --- Department of Biodiversity, South Africa G Derek Engelbrecht --- Department of Biodiversity, South AfricaSeparation of the eight southern African subspecies of Sabota Lark Calendulauda sabota into thick-billed and slender-billed groups has been proposed. This study used biometric data obtained from museum skins in South Africa to evaluate morphological variation in the subspecies as... -
Natal philopatry in young Cape Vultures Gyps coprotheres
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Margaret T Hirschauer --- VulPro NPC, South Africa Kerri Wolter --- VulPro NPC, South Africa Walter Neser --- VulPro NPC, South AfricaIn 2010, 14 Cape Vulture Gyps coprotheres chicks were ringed as nestlings on the cliffs at the Skeerpoort Cape Vulture colony in the Magaliesberg mountains, South Africa. Observations made during the 2014 and 2015 breeding colony censuses confirm two individuals... -
Obesity and associated factors in young adults attending tertiary institutions in south-eastern Nigeria
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Patricia Ogechi Ukegbu --- Department of Human Nutrition and Dietetics, Nigeria Ada Charity Uwaegbute --- Department of Human Nutrition and Dietetics, Nigeria Chinyere Akudo Echendu --- Department of Human Nutrition and Dietetics, Nigeria Chukwunonso Ejike --- Department of Biochemistry, Nigeria Julie Uche Anyika-Elekeh --- Department of Human Nutrition and Dietetics, Nigeria Victoria Uzoamaka Asumugha --- Department of Human Nutrition and Dietetics, Nigeria Solomon Abasiekong Kuyik --- Department of Food Science and Technology, Nigeria Shola Omodamiro --- Department of Biochemistry, Nigeria Blessing Nwofia --- Department of Human Nutrition and Dietetics, Nigeria Chinwe Uzokwe --- Department of Human Nutrition and Dietetics, Nigeria Chidinma Oluchi-Nliam --- Department of Human Nutrition and Dietetics, Nigeria Nnenna Uwakwe --- Department of Human Nutrition and Dietetics, NigeriaObjective: To assess prevalence of overweight/obesity and associated factors in a group of university undergraduates in south-east Nigeria. -
The presence and spectrum of bacteria colonising mobile phones of staff and caregivers in high disease burden paediatric and neonatal wards in an urban teaching hospital in Durban, South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Raziya Bobat --- Department of Paediatrics and Child Health, Nelson R Mandela School of Medicine, South Africa Moherndran Archary --- King Edward VIII Hospital, South Africa Melissa Lawler --- King Edward VIII Hospital, South Africa Sajeeda Mawlana --- Enhancing Care Foundation, South Africa Kimesh L Naidoo --- King Edward VIII Hospital, South Africa Sandra Maphumulo --- Department of Microbiology, Nelson R Mandela School of Medicine, South Africa Yacoob Coovadia --- Department of Microbiology, Nelson R Mandela School of Medicine, South AfricaBackground: Hospital acquired infections are on the increase worldwide. A possible source for transmission is the presence of microorganisms on mobile phones which are carried by increasing numbers of medical and nursing staff, students, and caregivers. -
Assessment of knowledge, attitude and practice of post-exposure prophylaxis against blood-borne viral infection among dental surgeons in a teaching hospital
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Mercy Okoh --- Oral Pathology and Medicine Department, Nigeria Birch Dauda Saheeb --- Oral and Maxillofacial Surgery Department, NigeriaBackground: This study was aimed at assessing the level of knowledge, attitude and practice of dental surgeons on human immunodeficiency virus (HIV) and hepatitis B virus (HBV) post-exposure prophylaxis (PEP). -
Multiplex-ready PCR assay of SSR marker diversity among quality protein maize inbred parental lines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Adeniyi S Atanda --- Department of Agronomy, Nigeria Gbadebo Olaoye --- Department of Agronomy, NigeriaPhenotypic markers have long been used for classification of maize (Zea mays) cultivars. However, because of shortcomings in detecting differences among closely related genotypes, coupled with sensitivity to environmental conditions, molecular marker techniques have been employed in the determination of... -
Effect of conservation agriculture associated crop rotation systems on root and crown rot severity and respective soil-borne pathogens of maize (Zea mays L.) in the Highveld area of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Maryke Craven --- Agricultural Research Council – Grain Crops Institute, South Africa André A Nel --- Agricultural Research Council – Grain Crops Institute, South AfricaAlthough crop rotation reduces the incidence of soil-borne diseases, reduced tillage practices create the risk of increased disease incidence. Monoculture maize (MM) under both conventional tillage (CT) and conservation agriculture (CA) crop systems were evaluated against two-and three-year rotation CA... -
Nutritional quality of baby spinach (
Spinacia oleracea L. ) as affected by nitrogen, phosphorus and potassium fertilisationItem type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Bongekile O Zikalala --- Department of Agriculture and Animal Health, South Africa Mpumelelo Nkomo --- Department of Agriculture and Animal Health, South Africa Hintsa Araya --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Wonder Ngezimana --- Marondera College of Agricultural Sciences and Technology, Zimbabwe Fhatuwani N Mudau --- Department of Agriculture and Animal Health, South AfricaBaby spinach is a nutritious vegetable rich in phytochemicals and minerals. Cultural practices such as fertilisation have an impact on the nutritional composition of vegetables. Hence, the current study investigated the responses of the chemical composition of baby spinach to... -
Gunnera perpensa L.: A multi-use ethnomedicinal plant species in South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Fitsum K. Mammo --- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, South Africa Viresh Mohanlall --- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, South Africa Francis O. Shode --- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, South AfricaGunnera perpensa L. is a medicinal plant used in many parts of South Africa to treat several human ailments. G. perpensa is inherited from and linked to the Siswati, Changana, Sotho, Venda, Shona, Tsonga, and Zulu traditional healing systems, particularly... -
Optimization of copper nanoparticle biosynthesis process using aqueous extract of Andrographis paniculata
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Supratim Biswas --- Mineral Processing and Technology Research Centre, Department of Metallurgy Faculty of Engineering & The Built Environment, South Africa Suparna Chakraborty --- School of Materials Science and Nanotechnology, India Antoine F. Mulaba-Bafubiandi --- Mineral Processing and Technology Research Centre, Department of Metallurgy Faculty of Engineering & The Built Environment, South AfricaThe competency of aqueous extract of Andrographis paniculata (kalmegh) to reduce copper nitrate for the biosynthesis of copper nanoparticle (CuNPs) was investigated. The experiments were set up according to the design of experiment technique and the results were analyzed for... -
Reparative sexual orientation therapy effects on gay sexual identities
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jaco Van Zyl --- Department of Psychology, South Africa Kathryn Nel --- Department of Psychology, South Africa Saraswathie Govender --- Department of Psychology, South AfricaThe study explored gay males’ identities and experiences with sexual reparative therapy. The sample consisted of five white Christian males (age range 24 – 41 years), who responded to a semi-structured interview on their self-identity with reparative therapy. Interpretative Phenomenological... -
Obesity and kidney disease: hidden consequences of the epidemic
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Csaba P Kovesdy --- Division of Nephrology, Department of Medicine, United States Susan Furth --- Department of Pediatrics, United States Carmine Zoccali --- CNR – IFC Clinical Epidemiology and Pathophysiology of Renal Diseases and Hypertension, Italy [FN0001]Obesity has become a worldwide epidemic, and its prevalence has been projected to grow by 40% in the next decade. This increasing prevalence has implications for the risk of diabetes, cardiovascular disease and also for chronic kidney disease. A high... -
Portfolio performance under reference-day risk
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Marcelo Gonzalez --- Universidad de Chile, Chile Arturo Rodriguez --- Universidad de Chile, Chile Roberto Stein --- College of Business Administration, USAReference-day risk has been previously identified as a type of sampling variation phenomenon, and its effect on the estimation of stock returns and their volatility and market betas has been documented. Using a dataset of daily equity mutual fund returns,... -
A review of carbon dynamics and assessment methods in the miombo woodlands
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ferdinand Handavu --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, South Africa Paxie W Chirwa --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, South Africa Stephen Syampungani --- Department of Environmental and Plant Sciences, Zambia Larwanou Mahamane --- African Forest Forum, c/o World Agroforestry Centre (ICRAF), KenyaProvision of accurate carbon (C) measurements and analysis are critical components in quantification of C stocks. The objectives of this review were to (1) compile and synthesise current knowledge of available methods for C stock estimation, (2) examine socio-economic drivers... -
Plastic waste as strength modifiers in asphalt for a sustainable environment
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Adedayo A. Badejo --- Department of Civil Engineering, Nigeria Adebola A. Adekunle --- Department of Civil Engineering, Nigeria Olusola O. Adekoya --- Department of Civil Engineering, Nigeria Julius M. Ndambuki --- Department of Civil Engineering, South Africa Kehinde W. Kupolati --- Department of Civil Engineering, South Africa Babatunde S. Bada --- Department of Environmental Management and Toxicology, Nigeria David O. Omole --- Department of Civil Engineering, NigeriaThis research took the form of an investigation into the applicability of polyethylene terephthalate (PET) as strength modifiers in asphalt road construction. Samples of thoroughly washed, naturally dried and shredded PET wastes were collected. The optimum binder content (OBC) of... -
Acoustic fish biomass assessment in a deep Tunisian reservoir: effects of season and diel rhythm on survey results
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: I Djemali --- Institut National des Sciences et Technologies de la Mer, Tunisia H Laouar --- Centre Technique de l’Aquaculture, TunisiaTo determine the best acoustic sampling period for obtaining fish biomass estimates of a Mediterranean deep reservoir in Tunisia, day and night surveys were performed in spring (April), summer (September), autumn (December) and winter (March). A Simrad EK60 echosounder, equipped... -
The abundance of an invasive freshwater snail Tarebia granifera (Lamarck, 1822) in the Nseleni River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RW Jones --- Department of Zoology and Entomology, South Africa JM Hill --- Department of Zoology and Entomology, South Africa JA Coetzee --- Department of Botany, South Africa TS Avery --- Department of Biology and Mathematics & Statistics, Canada OLF Weyl --- Centre for Invasion Biology, South Africa MP Hill --- Department of Zoology and Entomology, South AfricaThe invasive freshwater snail Tarebia granifera (Lamarck, 1822) was first reported in South Africa in 1999 and it has become widespread across the country, with some evidence to suggest that it reduces benthic macroinvertebrate biodiversity. The current study aimed to... -
Carbon dioxide: making the right connection
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Matthew Winton Gibbs --- Department of Anaesthesia & Perioperative Medicine, South Africa Ross Hofmeyr --- Department of Anaesthesia & Perioperative Medicine, South AfricaCarbon dioxide has been used in anaesthesia since the late 1920s, principally to stimulate breathing after a period of hyperventilation in the era before routine use of capnography. The authors’ tertiary academic hospital still has the infrastructure for pipeline delivery... -
Emergence response of sunflower (Helianthus annuus) cultivars to supra-optimal soil temperatures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lize Henning --- Department of Soil, Crop and Climate Sciences, South Africa Gert Ceronio --- Department of Soil, Crop and Climate Sciences, South Africa André A Nel --- Agricultural Research Council–Grain Crops Institute, South AfricaSeedling emergence is a sensitive stage during sunflower (Helianthus annuus L.) establishment. Abiotic stresses, such as high soil temperatures (above 40 °C), can cause delayed emergence resulting in uneven stand and ultimately poor yields. Therefore, the emergence and early growth... -
Assessing effect of rainfall on rate of alien shrub expansion in a southern African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mhosisi Masocha --- Department of Geography and Environmental Science, Faculty of Science, Zimbabwe Timothy Dube --- Department of Geography and Environmental Studies, South Africa Andrew Skidmore --- Faculteit Geo-Informatie Wetenschappen en Aardobservatie, The Netherlands Milena Holmgren --- Resource Ecology Group, The Netherlands Herbert Prins --- Resource Ecology Group, The NetherlandsUnderstanding the environmental factors governing the spread of alien shrubs is crucial for conserving biodiversity. In the semi-arid savannas of Africa, alien shrub invasion often occurs simultaneously with native shrub encroachment but climate-dependent differences in encroachments of native and alien... -
Historical vegetation–environment patterns for assessing the impact of climatic change in the mountains of Lesotho
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Craig Morris --- Agricultural Research Council – Livestock Business Division, c/o School of Life Sciences, South AfricaClimate change will probably profoundly impact the Maloti Mountains in Lesotho, which are likely to have a warmer, wetter and more CO2-enriched (eCO2) atmosphere in the future. Intensive smallstock grazing could exacerbate the effects of climate change on the mountain... -
Sheddable armour: identification of osteoderms in the integument of Geckolepis maculata (Gekkota)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Daniel J. Paluh --- , , USA Aaron H. Griffing --- , , USA Aaron M. Bauer --- , , USAOsteoderms are bony deposits that form within the dermal layer of skin in vertebrates. Within geckos, osteoderms are uncommon, only described in Gekko gecko and the genus Tarentola. A previous report of osteoderms in the Afro-Malagasy gekkonid genus Geckolepis has... -
Genetic diversity and differentiation of the Western Leopard Toad (Sclerophrys pantherina) based on mitochondrial and microsatellite markers
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jessica M. da Silva --- , , South Africa Kevin A. Feldheim --- , , USA G. John Measey --- , , South Africa Stephen Doucette-Riise --- , , South Africa Ryan J. Daniels --- , , South Africa Lucas F. Chauke --- , , South Africa Krystal A. Tolley --- , , South AfricaIntraspecific genetic diversity provides the basis for evolutionary change and is therefore considered the most fundamental level of biodiversity. Mitochondrial DNA (mtDNA) and microsatellite loci are the markers most typically used in population-level studies; however, their patterns of genetic variation... -
Erythrocyte morphology of the Critically Endangered Geometric Tortoise Psammobates geometricus: effects of season, sex and age
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Shasheen Walton --- , , South Africa Margaretha Hofmeyr --- , , South AfricaLand transformation reduced the habitat of Psammobates geometricus to small isolated fragments, rendering the species vulnerable to extinction. Field biologists often use erythrocyte metrics to assess wildlife health but need baseline values to distinguish normal variations from disease or chronic... -
Three new species of Arthroleptella Hewitt, 1926 (Anura: Pyxicephalidae) from the Cape Fold Mountains, South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Andrew Turner --- , South Africa Alan Channing --- , South AfricaA comprehensive survey of the Cape Fold Mountains, South Africa, was undertaken for moss frogs of the genus Arthroleptella. Advertisement calls were recorded and voucher specimens collected for all populations encountered. A molecular phylogeny was constructed for the entire genus... -
Results from four Pinus patula water planting trials in the summer rainfall region of South Africa
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: CA Rolando KM LittlePlanting with water is used by some forestry companies in South Africa to reduce post-planting water stress. Four trials were implemented to test the response in survival of Pinus patula to water applied at planting. Two trials each were situated... -
Growth and phenology of a three- to four-year-old Sclerocarya birrea international provenance trial in Malawi
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: PW Chirwa RJ Bwanali G Meke W Sagona CRY Munthali L MwabumbaIndigenous wild fruits of Sclerocarya birrea have been used to supplement diets in time of critical food shortage, generate income when sold and as a source of raw materials for natural food-based industries in many developing countries. However, the widespread... -
Developmental rates and morphological properties of fibres in two eucalypt clones at sites differing in water availability
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: DM Drew NW PammenterOne of the ways in which the global forestry industry can remain competitive is to improve the predictability of properties of fibres produced, particularly in plantations. Since the properties of the fibres are determined by growth and developmental processes, it... -
Predicting Mycosphaerella leaf disease severity in a Eucalyptus globulus plantation using digital multi-spectral imagery
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: E Pietrzykowski N Sims C Stone L Pinkard C MohammedDigital remote sensing is rapidly developing into an operational tool for forest health assessment at a range of scales. A key aspect of this development is the derivation of models relating spectral data contained in the images to the extent... -
Older age South African persons’ experiences of their needs with cell phone use
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Emmylou Lamont --- School of Psychosocial Behavioural Sciences, Community Psychosocial Research (COMPRES), South Africa Werner de Klerk --- School of Psychosocial Behavioural Sciences, Community Psychosocial Research (COMPRES), South Africa Lelanie Malan --- School of Psychosocial Behavioural Sciences, Community Psychosocial Research (COMPRES), South AfricaThis study explored the needs met by cell phone use by older persons. Informants were 52 older South Africans (age range 65 to 89 years, male = 8, female = 44). The older persons completed a visual representation and semi-structured... -
The dynamics and digitisation of religious testimonies: a case of prophetic ministries in Botswana
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Gabriel Faimau --- Department of Sociology, BotswanaA major element in the religious practice of believers in prophetic Christianity is the sharing of religious testimonies. Focusing on prophetic ministries in Botswana, this paper examines the nature and function of religious testimonies and the dynamics of their digitisation... -
Significant genetic differentiation among meroplanktonic barrel jellyfish Rhizostoma pulmo (Cnidaria: Scyphozoa) in the Mediterranean Sea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AR Ben Faleh --- Marine Biology Unit, Faculty of Sciences of Tunis, Tunisia H Allaya --- Marine Biology Unit, Faculty of Sciences of Tunis, Tunisia A Armani --- FishLab, Department of Veterinary Sciences, Italy AAB Shahin --- Department of Zoology, Faculty of Science, EgyptMolecular data have shown that jellyfishes are more geographically restricted and evolutionarily divergent than previously thought. We examined genetic variation and divergence within the meroplanktonic barrel jellyfish Rhizostoma pulmo in the Mediterranean Sea; specific sampling areas were the northern Adriatic,... -
Photosynthesis versus irradiance relationships in the Atlantic sector of the Southern Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Thomalla --- Ocean Systems and Climate Group, South Africa E Kean --- Biological Sciences Department, South Africa M Lucas --- Biological Sciences Department, South Africa M-J Gibberd --- Biological Sciences Department, South Africa R Barlow --- Department of Oceanography, South AfricaEleven incubation experiments were conducted in the South Atlantic sector of the Southern Ocean to investigate the relationship between new production (ρNO–3), regenerated production (ρNH+4), and total carbon production (ρC) as a function of varying light. The results show substantial... -
Long-term trends in cetacean occurrence during the annual sardine run off the Wild Coast, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Caputo --- Department of Zoology and Entomology, South Africa PW Froneman --- Department of Zoology and Entomology, South Africa D du Preez --- School of Environmental Sciences, South Africa G Thompson --- KwaZulu-Natal Sharks Board, South Africa S Plön --- School of Environmental Sciences, South AfricaDuring the austral winter, cetaceans and other apex predators follow the annual northeastward movement of shoaling sardines, known as the sardine run, along the southeast coast of South Africa, including a 400-km stretch called the Wild Coast. In total, 131... -
Methylphenidate use among students living in junior on-campus residences of the University of the Free State
Item type: Journal Article • Journal: South African Family Practice • Authors: PM Van Zyl --- Department of Pharmacology, South Africa G Joubert --- Department of Biostatistics, South Africa L Fechter --- School of Medicine, South Africa J Griesel --- School of Medicine, South Africa M Nel --- School of Medicine, South Africa A Honiball --- School of Medicine, South Africa L Serfontein --- School of Medicine, South Africa M Diedericks --- School of Medicine, South AfricaBackground: The use of methylphenidate as cognitive enhancer is a growing trend among students at tertiary institutions globally. This study aimed to determine the prevalence of methylphenidate use and co-use with alcohol among on-campus residence students of the University of... -
Impact of percutaneous nephrostomy in South African women with advanced cervical cancer and obstructive uropathy
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Matthys Cornelis van Aardt --- Obstetrics and Gynaecology, South Africa Judith van Aardt --- Obstetrics and Gynaecology, South Africa Arnold Mouton --- Obstetrics and Gynaecology, South AfricaObjectives: South Africa women with cervical carcinoma present at younger ages and the majority with advanced-stage disease. Certain patients may have a favourable outcome after placement of a percutaneous nephrostomy (PCN) for obstructive uropathy in cervical cancer. -
Visitors to nests of Hooded Vultures Necrosyrtes monachus in northeastern South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Lindy J Thompson --- School of Life Sciences, South Africa John P Davies --- Lawson’s Birding, Wildlife and Custom Safaris, South Africa Maja Gudehus --- Selati Private Game Reserve, South Africa André J Botha --- Endangered Wildlife Trust, South Africa Keith L Bildstein --- Acopian Centre for Conservation Learning, Hawk Mountain Sanctuary, USA Campbell Murn --- Hawk Conservancy Trust, UK Colleen T Downs --- School of Life Sciences, South AfricaHooded Vultures Necrosyrtes monachus are critically endangered but little is known of their year-round use of nests or whether other species usurp Hooded Vulture nest sites. We investigated visitation rates by Hooded Vultures and other species (including potential nest predators... -
Sexual dimorphism and plumage characteristics of juvenile Cape Vultures Gyps coprotheres
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Nobuhle T Mabhikwa --- Department of Forest Resources and Wildlife Management, Zimbabwe Margaret T Hirschauer --- VulPro NPO, South Africa Kerri Wolter --- VulPro NPO, South AfricaThe plumage of young Cape Vultures Gyps coprotheres is streaked to varying degrees on the breast, ruff and upper wing coverts. Observations of breast plumage (individual feather streak coverage and overall streaking intensity) were made on Cape Vultures aged one... -
Anaesthetic management of a patient with multiple system atrophy
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Supriya Dsouza --- Department of Critical Care, India Anil Parakh --- Department of Anaesthesiology, India Adarsh Kulkarni --- Seth Gs Medical College and Kem Hospital, India Ajit Baviskar --- Department of Critical Care, IndiaMultiple system atrophy (MSA) is a rare adult-onset neurodegenerative disease. Symptoms vary from autonomic dysfunction to Parkinsonism and cerebellar ataxia, in any combination. MSA affects many organ systems with many possible complications and makes perioperative management of a patient with... -
Nor-epinephrine versus vasopressin infusion for prevention of spinal-induced hypotension: a placebo-controlled study
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Ahmed Abdalla Mohamed --- Department of Anesthesia & ICU and Pain Clinic, Egypt Tamer Fayez Safan --- Department of Anesthesia & ICU and Pain Clinic, EgyptObjectives: To evaluate the prophylactic effect of norepinephrine (NE) and vasopressin (VP) infusion on frequency and severity of spinal anaesthesia-induced hypotension (SAIH). -
Improvement of spatial modelling of crop suitability using a new digital soil map of Tanzania
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Kristin Piikki --- International Center for Tropical Agriculture (CIAT), Kenya Leigh Winowiecki --- World Agroforestry Centre (ICRAF), Kenya Tor-Gunnar Vågen --- World Agroforestry Centre (ICRAF), Kenya Julian Ramirez-Villegas --- International Center for Tropical Agriculture (CIAT), Colombia Mats Söderström --- International Center for Tropical Agriculture (CIAT), KenyaClimate change is projected to have widespread impacts on the climate suitability and geographical distribution of agricultural crops. Simulations were conducted on the suitability of common beans (Phaseolus vulgaris L.) in Tanzania under progressive climate change, taking into account a... -
Operation and maintenance of back-up photovoltaic systems: An analysis based on a field study in Cameroon
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kodji Deli --- Department of Renewable Energy, Higher Institute of the Sahel, Cameroon Etienne Tchoffo Houdji --- Department of Renewable Energy, Higher Institute of the Sahel, Cameroon Noel Djongyang --- Department of Renewable Energy, Higher Institute of the Sahel, Cameroon Donatien Njomo --- Environmental Energy Technologies Laboratory (EETL), Department of Physics, Faculty of Science, CameroonThis work is an analysis of the data collected from 20 photovoltaic installations all over Cameroon. The objectives are to study the causes of the breakdown of the different installations and propose maintenance strategies to solve them and to evaluate... -
Mechanisms of antibiotic resistance in Haemophilus parainfluenzae
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Regina E. Abotsi --- Antimicrobial Research Unit, School of Health Science, South Africa Usha Govinden --- Antimicrobial Research Unit, School of Health Science, South Africa Sabiha Y. Essack --- Antimicrobial Research Unit, School of Health Science, South AfricaHaemophilus parainfluenzae is part of the HACEK group of fastidious bacteria commonly implicated in endocarditis and bacteremia. Previously considered as a normal respiratory, oral and sometimes genitourinary commensal, it has been recognised as a pathogen that can cause life-threatening infections... -
Psychometric properties of the Psychological Flourishing Scale in an Egyptian setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Marei Salama-Younes --- Department of Psychology, Sociology and Evaluation in Sport Field, EgyptThe specific goals of the present research were twofold: i) to test the structure validity, and internal reliability of scores from the Psychological Flourishing Scale (PFS) with Egyptian college students; and ii) to test the PFS’s temporal stability and convergent... -
Physico-chemical limnology and plankton dynamics of Mazvikadei, a tropical reservoir in Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mhlanga --- University of Zimbabwe, Zimbabwe C Mungenge --- University of Zimbabwe, Zimbabwe T Nhiwatiwa --- University of Zimbabwe, ZimbabweThe limnology of Mazvikadei Reservoir, northern Zimbabwe, was investigated in 2015 to determine whether it had changed since filling in 1990. The reservoir is characterised by low algal biomass, low nutrients (i.e. N and P) and high water clarity/transparency. Fifty-four... -
Relationship between somatic growth and otolith growth: a case study of the ornate jobfish Pristipomoides argyrogrammicus from the coast of Réunion (SW Indian Ocean)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Mahé --- Ifremer, Fisheries Laboratory, Sclerochronology Centre, France Y Aumond --- Ifremer, Le Port, France K Rabhi --- Ifremer, Fisheries Laboratory, Sclerochronology Centre, France R Elleboode --- Ifremer, Fisheries Laboratory, Sclerochronology Centre, France E Bellamy --- Ifremer, Laboratoire Environnement Ressources Languedoc Roussillon, France J Huet --- Ifremer, Le Port, France M Gault --- FRS Marine Laboratory, Scotland D Roos --- Ifremer, Le Port, FranceThe ornate jobfish Pristipomoides argyrogrammicus Valenciennes 1832 occurs in the Indo-West Pacific Ocean, where it is harvested by small-scale coastal fisheries. Management of this species is hindered by lack of adequate biological data. We sampled a total of 113 individuals... -
Effects of waterlogging, salinity and light on the productivity of Bruguiera gymnorrhiza and Heritiera littoralis seedlings
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MM Mangora --- Institute of Marine Sciences, University of Dar es Salaam, Tanzania MSP Mtolera --- Institute of Marine Sciences, University of Dar es Salaam, Tanzania M Björk --- Department of Ecology, Environment and Plant Sciences, SwedenThis study aimed to establish the effects of waterlogging, salinity and light on the early development of mangroves. Seedlings of Bruguiera gymnorrhiza (L.) Lamk. and Heritiera littoralis Dryand were exposed to 12 weeks of waterlogging, during which time growth and... -
A reflection on Paul Weinberg’s book “Traces and tracks”
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Kharnita Mohamed --- Department of Social Anthropology, School of African and Gender Studies, Anthropology and Linguistics, South AfricaIn this essay, Kharnita Mohamed responds to the book from which Paul Weinberg’s photo essay stems. -
HIV antiretroviral medication stock-outs in Ghana: contributors and consequences
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Rebecca A Poku --- The University of Texas Health Science Center at Houston School of Public Health, USA Adobea Yaa Owusu --- Institute of Statistical, Social, and Economic Research, University of Ghana, Ghana Patricia Dolan Mullen --- The University of Texas Health Science Center at Houston School of Public Health, USA Christine Markham --- The University of Texas Health Science Center at Houston School of Public Health, USA Sheryl A McCurdy --- The University of Texas Health Science Center at Houston School of Public Health, USADrug stock-outs are an unfortunate yet common reality for patients living in low and middle income countries, particularly in sub-Saharan Africa where trouble with consistent stock of antiretroviral medications (ARVs) continues. Our study takes a snapshot of this problem in... -
Family medicine in South Africa: exploring future scenarios
Item type: Journal Article • Journal: South African Family Practice • Authors: R Mash --- Division of Family Medicine and Primary Care, South Africa K Von Pressentin --- Division of Family Medicine and Primary Care, South AfricaThis paper reports on a workshop held at the 19th National Family Practitioners Conference in August 2016. The aim of the workshop was to describe possible future scenarios for the discipline of family medicine in South Africa and identify possible... -
Macroinvertebrate functional organisation along the longitudinal gradient of an austral temperate river
Item type: Journal Article • Journal: African Zoology • Authors: Sydney Moyo --- Department of Zoology and Entomology, South Africa Nicole B Richoux --- Department of Zoology and Entomology, South AfricaThe Kowie River, a relatively pristine system in South Africa, was sampled on four occasions over one year to determine if relative abundances of functional feeding groups (FFGs) of invertebrates changed along the longitudinal gradient, and if these changes matched... -
The rediscovery of a lost frog: Arthroleptis troglodytes Poynton, 1963
Item type: Journal Article • Journal: African Zoology • Authors: Francois S Becker --- Gobabeb Research and Training Centre, Namibia Robert W Hopkins --- Natural History Museum of Zimbabwe, ZimbabweThe cave squeaker Arthroleptis troglodytes Poynton, 1963 was first collected in 1961/62, and not observed again for 54 years despite several attempts to locate it. We rediscovered this species near the type locality in the Chimanimani mountain range in eastern... -
Redescription and molecular characterisation of the fish parasitic isopod Norileca indica (Milne Edwards, 1840) (Crustacea: Isopoda: Cymothoidae) with a key to the genus
Item type: Journal Article • Journal: African Zoology • Authors: Serita van der Wal --- Water Research Group, Unit for Environmental Sciences and Management, Potchefstroom Campus, South Africa Nico J Smit --- Water Research Group, Unit for Environmental Sciences and Management, Potchefstroom Campus, South Africa Kerry A Hadfield --- Water Research Group, Unit for Environmental Sciences and Management, Potchefstroom Campus, South AfricaNorileca indica (Milne Edwards, 1840) is fully redescribed based on ovigerous females collected from Maputo Bay, Mozambique, from the branchial cavity of the fish host Selar crumenophthalmus Bloch, 1793. An identification key to the species of Norileca Bruce, 1990 is... -
Scope of research on Parthenium hysterophorus in Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Owen Rubaba --- College of Health Sciences, South Africa Moses Chimbari --- College of Health Sciences, South Africa Samson Mukaratirwa --- School of Life Sciences, South AfricaParthenium (Parthenium hysterophorus) is an invasive plant that invades farm and grazing lands, and affects biodiversity, animal and human health, agricultural productivity and food security. The plant is native to the Americas, but was introduced to Africa, Asia and Australia... -
Preliminary evaluation of seed and germination traits in cowpea (Vigna unguiculata) genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Abe S Gerrano --- Agricultural Research Council–Vegetable and Ornamental Plant Institute, South Africa Willem S Jansen van Rensburg --- Agricultural Research Council–Vegetable and Ornamental Plant Institute, South Africa Patrick O Adebola --- Agricultural Research Council–Vegetable and Ornamental Plant Institute, South AfricaCowpea is a valuable crop for subsistence farmers in South Africa. Seed quantitative traits and germination parameters are important for good establishment of the crop, therefore the variation for these traits were determined for 44 cowpea genotypes. A field experiment... -
Increasing crop diversity increased soil microbial activity, nitrogen-sourcing and crop nitrogen, but not soil microbial diversity
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Zander S Venter --- Department of Animal Sciences, South Africa Samantha L Scott --- Plant Conservation Unit, South Africa Johann Strauss --- Directorate-Plant Sciences, Western Cape Department of Agriculture, South Africa Karin Jacobs --- Department of Microbiology, South Africa Heidi-Jayne Hawkins --- Conservation South Africa, Centre for Biodiversity Conservation, Kirstenbosch National Botanical Gardens, South AfricaThe relationships between crop diversity, soil microbial diversity and agroecosystem functioning are not well understood. Soils under wheat monoculture, wheat–medic, and wheat–medic plus clover rotations from a 19-year-old wheat rotation trial in South Africa were measured for soil microbial functional... -
Determining the optimal phenological stage for predicting common dry bean (Phaseolus vulgaris) yield using field spectroscopy
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Perushan Rajah --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa John Odindi --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa Elfatih Abdel-Rahman --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa Onisimo Mutanga --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South AfricaOn-farm crop productivity and yield prediction are valuable for, among others, designing food policies, on-farm and after-farm planning and pricing, and marketing. Whereas existing prediction approaches are generally reliable, these require extensive and tedious field surveys and adequate ancillary agrometeorological... -
Agromorphological diversity of South African sorghum genotypes assessed through quantitative and qualitative phenotypic traits
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Alina M Mofokeng --- Agricultural Research Council–Grain Crops Institute, South Africa Hussein A Shimelis --- School of Agricultural, Earth and Environmental Sciences, African Centre for Crop Improvement, South Africa Mark D Laing --- School of Agricultural, Earth and Environmental Sciences, African Centre for Crop Improvement, South AfricaKnowledge of genetic diversity among sorghum genotypes is essential for their efficient utilisation in plant breeding schemes and effective conservation. The objective of this study was to assess the level of genetic diversity present among South African sorghum genotypes using... -
Variation in morphology and yield traits of Cucurbita landraces in northern KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Nontuthuko R Ntuli --- Department of Botany, Faculty of Science and Agriculture, South Africa Rufaro M Madakadze --- African Crop Improvement Alliance for a Green Revolution in Africa, Kenya Alpheus M Zobolo --- Department of Botany, Faculty of Science and Agriculture, South AfricaPumpkins, represented by various Cucurbita species, are important traditional leafy vegetable crops that are widely eaten in KwaZulu-Natal, South Africa, and elsewhere. Cucurbita landraces are exceptionally variable in morphology and productivity. Although these vegetables are grown extensively in South Africa,... -
Activity of some Nile River aquatic macrophyte extracts against the cyanobacterium Microcystis aeruginosa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MM El-Sheekh --- Botany Department, Faculty of Science, Egypt AM Haroon --- Hydrobiology Laboratory, Egypt S Sabae --- Hydrobiology Laboratory, EgyptThe anti-algal activity of five macrophyte extracts on the cyanobacterium Microcystis aeruginosa in Egypt was investigated in 2013. Extract activity varied according to plant type, extracting solvent and its concentration. The highest inhibitory activity was achieved with ethanol extract at... -
Phytoplankton primary productivity seasonality and changes in a small African lake, Lake Hora-Kilole, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Abate --- Aquatic Sciences, Fisheries and Aquaculture Stream, Department of Zoological Sciences, China D Kifle --- Aquatic Sciences, Fisheries and Aquaculture Stream, Department of Zoological Sciences, Ethiopia YH Gao --- School of Life Sciences and State Key Laboratory of Marine Environmental Science, ChinaThe seasonality of primary productivity by phytoplankton in relation to physico-chemical and biological variables was studied in Lake Hora-Kilole from August 2007 to May 2008. In 1989, the Mojo River was temporarily diverted to flow into the lake, which substantially... -
Water quality assessment of the Siluko River, southern Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IP Oboh --- Department of Animal and Environmental Biology, Faculty of Life Sciences, Nigeria CS Agbala --- Department of Animal and Environmental Biology, Faculty of Life Sciences, NigeriaThe water quality of the Siluko River, Edo State, Nigeria was investigated from March to August 2015 to determine its suitability for drinking and usage for domestic purposes. Water samples collected from three stations were tested for thirteen physico-chemical parameters... -
Key factors that drive phytoplankton biomass and community composition in the urbanised Nahoon Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: P Cotiyane --- Department of Botany, South Africa J Adams --- Department of Botany, South Africa A Rajkaran --- Department of Biodiversity and Conservation Biology, South AfricaEstuaries are under intense pressure, because of urban developments and water abstraction. Water column characteristics of the Nahoon Estuary were examined in 2014–2015 to identify factors that influenced phytoplankton dynamics. The estuary was found to be saline (∼33) and remained... -
Gender-related morphometric differences in mature and nestling Crowned Eagles, with comments on ringing of eagle nestlings in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Shane C McPherson --- School of Life Sciences, South Africa Mark Brown --- School of Life Sciences, South Africa Colleen T Downs --- School of Life Sciences, South AfricaAlthough most raptor species are sexually dimorphic, many species are non-discrete in some metrics. A limited amount of existing data for southern Africa suggests that Crowned Eagles Stephanoaetus coronatus exhibit non-discrete sexual dimorphism. Consequently, we investigated gender-related morphometric data of... -
The taxonomic position and breeding range of Golden Nightjar Caprimulgus eximius (Caprimulgidae)
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Yvonne Lawrie --- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, UK Robert Swann --- , UK Peter Stronach --- , UK Yoav Perlman --- Israel Ornithological Center, Israel J Martin Collinson --- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, UKGolden Nightjar Caprimulgus eximius is an apparently sedentary sub-Saharan species with a breeding range extending from Senegal and Mauritania to Sudan. Although genetic studies of nightjars and related Caprimulgiformes have been published previously, none has included Golden Nightjar. In this... -
Bird species richness and densities in relation to sulphur dioxide gradients and environmental variables
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Luckson Muyemeki --- Unit for Environmental Sciences and Management (Geography and Environmental Management), South Africa Roelof Burger --- Unit for Environmental Sciences and Management (Geography and Environmental Management), South Africa Stuart J Piketh --- Unit for Environmental Sciences and Management (Geography and Environmental Management), South Africa Steven W Evans --- SARCHI Chair on Biodiversity Value and Change, School of Mathematical and Natural Sciences, South AfricaThe expansion of coal-fired power stations in South Africa has resulted in growing environmental concerns as they are the largest emitters of sulphur dioxide (SO2). Sulphur dioxide emissions from power plants pose a potential threat to avian populations. However, the... -
Mixed results: the protective role of schooling in the HIV epidemic in Swaziland
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Alan Whiteside --- Balsillie School of International Affairs, Canada Andriana Vinnitchok --- Wilfrid Laurier University, Canada Tengetile Dlamini --- National Emergency Response Council on HIV and AIDS, Switzerland Khanya Mabuza --- National Emergency Response Council on HIV and AIDS, SwitzerlandSwaziland has the highest HIV prevalence in the world. It is recognised that young women, especially adolescents, are particularly vulnerable to HIV infection and bear a disproportionate burden of HIV incidence. The HIV data from Swaziland show the location of... -
Contrasting hydrography and phytoplankton distribution in the upper layers of cyclonic eddies in the Mozambique Basin and Mozambique Channel
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Lamont --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa RG Barlow --- Marine Research Institute and Department of Oceanography, South AfricaHydrographic data collected in cyclonic eddies in the Mozambique Channel and Basin revealed notable differences in temperature and salinity at a depth of 100 m, the upper mixed layer, the nitracline depths, and vertical distribution of chlorophyll-a (Chl-a). Differences in... -
Phylogeny of the Sepia officinalis species complex in the eastern Atlantic extends the known distribution of Sepia vermiculata across the Benguela upwelling region
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AJE Healey --- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Wales NJ McKeown --- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Wales WM Potts --- Department of Ichthyology and Fisheries Science, South Africa CL de Beer --- Department of Ichthyology and Fisheries Science, South Africa W Sauer --- Department of Ichthyology and Fisheries Science, South Africa PW Shaw --- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, WalesAccurate species identification and biogeographic characterisation are fundamental for appropriate management of expanding cephalopod fisheries. This study addresses this topic within the common cuttlefish Sepia officinalis species complex (S. officinalis, S. hierredda and S. vermiculata), with an emphasis on occurrence... -
Changes in recreational shore anglers’ attitudes towards, and awareness of, linefish management along the KwaZulu-Natal coast, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RW Kramer --- Oceanographic Research Institute (ORI), South Africa BQ Mann --- Oceanographic Research Institute (ORI), South Africa SW Dunlop --- Oceanographic Research Institute (ORI), South Africa JB Mann-Lang --- Oceanographic Research Institute (ORI), South Africa D Robertson-Andersson --- School of Life Sciences, South AfricaManagement of recreational fisheries cannot be based on biological and stock assessment data alone but needs to include appropriate social aspects (including knowledge, attitudes and behaviour) of anglers within the fishery. The primary purpose of this study was to evaluate... -
Investigation of the properties and production of sawdust ceiling tile using polystyrene as a binder
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Pius Bamidele Mogaji --- Department of Mechanical Engineering, Nigeria Sesan Peter Ayodeji --- Department of Mechanical Engineering, Nigeria Ayodeji David Olatise --- Department of Mechanical Engineering, Nigeria Isiaka Oluwole Oladele --- Department of Material and Metallurgical Engineering, NigeriaIn this research, a production and properties investigation of wood sawdust ceiling tile using polystyrene as a binder was carried out. The content by weight of the wood sawdust was 5, 10, 15, 20, 25 and 30% consisting of three... -
A retrospective analysis of electrocardiographic abnormalities found in black South African patients with diabetes attending a regional hospital in KwaZulu-Natal
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: S Pillay --- Department of Internal Medicine, South Africa R Hift --- School of Clinical Medicine, South Africa C Aldous --- School of Clinical Medicine, South Africa -
The effect of sevoflurane induction on the myocardial performance index in healthy individuals
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Aidan C Kingwill --- Department of Anaesthesia, School of Medicine, South Africa Johannes van der Westhuizen --- Department of Anaesthesia, School of Medicine, South Africa Edwin W Turton --- Department of Anaesthesia, School of Medicine, South AfricaBackground: The myocardial performance (Tei) index is a simple, reproducible and easily performed measure of cardiac performance. Its ease of use and proven clinical application make this an attractive measure perioperatively. For appropriate use of this index under sevoflurane anaesthesia,... -
Perioperative echocardiography for invasive thymoma with intracardiac invasion in a child: a case report
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Megan Sanders --- Department of Anaesthesiology, South Africa Ahmad Alli --- Department of Anaesthesiology, South AfricaIn the paediatric population, thymomas are rare mediastinal tumours. Surgical management is the main treatment for these tumours. A case of an aggressive thymoma with intracardiac invasion in a child is presented. The management plan involved either resection of the... -
A practical guide to the interpretation of PK/PD profiles of longer-acting analogue insulins. Part one: The principles of glucose clamp studies
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Oppel BW Greeff --- Department of Pharmacology, South Africa Jacob John van Tonder --- Triclinium Clinical Development (Pty) Ltd, South Africa Kershlin Naidu --- Department of Internal Medicine, South Africa Alicia McMaster --- Sanofi-Aventis South Africa (Pty) Ltd, South Africa Alet van Tonder --- Sanofi-Aventis South Africa (Pty) Ltd, South Africa Rashem Mothilal --- Sanofi-Aventis South Africa (Pty) Ltd, South AfricaGlucose clamp studies are used to determine pharmacokinetics (PK) and pharmacodynamics (PD) of analogue insulins. With the development of longer-acting basal analogue insulins, including glargine 300 (Gla-300) and insulin degludec (IDeg), results from numerous glucose clamp studies are readily available... -
Mother- and daughter-in-law relationship within a South African context: Influence of family systems
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Tebogo Rosina Nganase --- Department of Psychology, South Africa Wilna Basson --- Department of Psychology, South AfricaThis study explored family system influences on mother-in-law and daughter-in-law relationships in a South African setting. A convenience sample of 20 mothers-in-law (age range from 40 to 86) and 20 daughters-in-law (age range from 20 to 60) were informants. They... -
Daily life with early orphanhood from HIV/AIDS: An exploratory study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Asamenew Demessie Bireda --- Faculty of Education, South Africa Jace Pillay --- South African Research Chair: Education and Care in Childhood, Faculty of Education, South AfricaThis study explored the everyday lived life by South African early adolescents orphaned by HIV/AIDS. Informants were ten early adolescents (age range 12 to 14 years; females = 6; males = 4) from a low socioeconomic status neighbourhood of Johannesburg. The adolescents completed autobiographical... -
Cyclic variation of the oviduct structure of Boulengerula taitana, an oviparous species of Gymnophiona: morphological changes, proliferation and apoptosis
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: C. Brun --- , France M.A. Raquet --- , France G.J. Measey --- , , South Africa J.M. Exbrayat --- , FranceFunctioning of the amphibian oviduct is the subject of many studies, but detailed understanding of caecilian reproduction exists for very few species. In this study, a description is made of morphological changes of the oviduct of the caecilian Boulengerula taitana... -
Sexual cycle and seasonal expression of testosterone (T) in the testes of Sclerophrys mauritanica (Schlegel, 1841)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Omar Kisserli --- , , Algérie Elara Moudilou --- , France Jean-Marie Exbrayat --- , FranceSclerophrys mauritanica is an anuran amphibian found in the wetlands of Beni-belaid, Jijel, Algeria. The animals are constrained by wet (from September until May) and dry (from June until August) seasons, however, the sexual cycle of males is continuous (all... -
Acoustic communication and reproductive behaviour in the aquatic frog Xenopus laevis (Pipidae), a field study
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Achim Ringeis --- , , Germany Birgit Krumscheid --- , , Germany Phillip J. Bishop --- , , New Zealand Christian de Vries --- , , Germany Andreas Elepfandt --- , , GermanyWe studied the acoustic and reproductive behaviour of the clawed frog, Xenopus laevis, in a pond with clear water in South Africa over a period of two months. It contained 21 adult males and females. Each was marked with a... -
Diet and feeding in the Cape Cobra, Naja nivea
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Inshaaf Layloo --- , , South Africa Caitlin Smith --- , , South Africa Bryan Maritz --- , , South AfricaIt is widely reported that African cobras (genus Naja) are generalist predators, but examination of formal literature yields relatively little evidence of this for most species. Here, we review the diet of cape cobras (Naja nivea) based on examination of... -
The bird’s-eye perspective: how do district health managers experience the impact of family physicians within the South African district health system? A qualitative study
Item type: Journal Article • Journal: South African Family Practice • Authors: KB Von Pressentin --- Division of Family Medicine and Primary Care, South Africa RJ Mash --- Division of Family Medicine and Primary Care, South Africa L Baldwin-Ragaven --- Department of Family Medicine, School of Clinical Medicine, South Africa RPG Botha --- Department of Family Medicine, South Africa I Govender --- Department of Family Medicine, South Africa WJ Steinberg --- Department of Family Medicine, South AfricaBackground: Health policy-makers in Africa are looking for local solutions to strengthen primary care teams. A South African national position paper (2015) described six aspirational roles of family physicians (FPs) working within the district health system. However, the actual contributions... -
Retrospective clinical analysis of adverse drug reactions associated with antiretroviral therapy in Tlokwe district, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Rentia van Graan --- Centre of Excellence for Pharmaceutical Sciences (PharmaCen), Division of Pharmacology, South Africa Michelle Viljoen --- Centre of Excellence for Pharmaceutical Sciences (PharmaCen), Division of Pharmacology, South Africa Malie Rheeders --- Centre of Excellence for Pharmaceutical Sciences (PharmaCen), Division of Pharmacology, South Africa Fadeela Motara --- Potchefstroom Hospital, Pharmacy, South AfricaBackground: South Africa has the highest number of patients on antiretroviral therapy (ART) globally. Various obstacles were identified that influence effective reporting of adverse drug reactions (ADRs) in resource-limited countries. This investigation aimed to identify, classify and analyse the prevalence... -
Phylogeography of oribi antelope in South Africa: evolutionary versus anthropogenic panmixia
Item type: Journal Article • Journal: African Zoology • Authors: Bettine Jansen van Vuuren --- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, South Africa Ian Rushworth --- Ecological Advice Division, Scientific Services, South Africa Claudine Montgelard --- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, South AfricaThe increased rate of human-driven change is a major threat to biodiversity. Although there is sufficient evidence to suggest that species notably alter their ranges, facilitation of such movement for larger vertebrate species often places burdens on management agencies. Oribi... -
Evidence of multiple divergent mitochondrial lineages within the southern African diplopod genus Bicoxidens Attems, 1928 (Spirostreptida)
Item type: Journal Article • Journal: African Zoology • Authors: Tawanda Tinago --- Department of Biology, School of Natural Sciences and Mathematics, Zimbabwe Tarombera Mwabvu --- School of Biology and Environmental Sciences, Faculty of Agriculture and Natural Sciences, South Africa Angus HH MacDonald --- School of Life Sciences, South AfricaTwo recent studies have suggested that divergent mitochondrial lineages may be present within spirostreptid genera such as Bicoxidens Attems, 1928. Bicoxidens, similar to many other endemic soil invertebrates, exhibits low dispersal capabilities and strict microclimate habitat preferences, attributes that often... -
Predatory pelagic fishes of the Bijagós Archipelago (Guinea-Bissau) show high overlap in diets dominated by sardinella
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Correia --- Centro de Estudos do Ambiente e do Mar (CESAM), Departamento de Biologia Animal, Portugal JP Granadeiro --- Centro de Estudos do Ambiente e do Mar (CESAM), Departamento de Biologia Animal, Portugal A Regalla --- Instituto da Biodiversidade e das Áreas Protegidas da Guiné-Bissau (IBAP), Guinea-Bissau E Dias --- Instituto da Biodiversidade e das Áreas Protegidas da Guiné-Bissau (IBAP), Guinea-Bissau A Almeida --- Centro de Investigação Pesqueira Aplicada (CIPA), Guinea-Bissau P Catry --- Marine and Environmental Sciences Centre (MARE), PortugalKnowledge of trophic interactions between the key components of marine communities is required to understand food-web dynamics and develop ecosystem-based management approaches. In West Africa, where fisheries sustain the livelihoods of a significant part of the human population, this understanding... -
Vertical distribution of living mangrove foraminifera from KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KL Strachan --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa TR Hill --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa JM Finch --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South AfricaModern foraminiferal assemblage zones can be used to reconstruct palaeo sea levels when applied to fossil foraminifera down a sediment core. Previous intertidal foraminiferal studies have predominantly focused on assemblages in surface sediments (0–1 cm), with the rationale that surface... -
Multi-stakeholder collaboration yields valuable data for cetacean conservation in Gamba, Gabon
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Minton --- WWF Gabon, Gabon JR Kema Kema --- WWF Gabon, Gabon A Todd --- Gabon Biodiversity Program, Center for Conservation and Sustainability, Gabon L Korte --- Gabon Biodiversity Program, Center for Conservation and Sustainability, Gabon PB Maganga --- WWF Gabon, Gabon JR Migoungui Mouelet --- Brigade de Peche de Gamba/Department des Pêches et d’Aquaculture, Gabon AM Nguema --- Agence National des Parc Nationaux, Gabon E Moussavou --- Brigade de Peche de Gamba/Department des Pêches et d’Aquaculture, Gabon GK Nguélé --- Agence National des Parc Nationaux, GabonPrivate industry, the Government of Gabon and two international NGOs collaborated to conduct marine surveys off the coast of Gabon, Central Africa. Surveys addressed multiple objectives of surveillance and monitoring, the documentation of the distribution of and threats to the... -
The ‘suitcase hypothesis’: Can entrainment of meroplankton by eddies provide a pathway for gene flow between Madagascar and KwaZulu-Natal, South Africa?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Ockhuis --- Cape Peninsula University of Technology, South Africa JA Huggett --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa G Gouws --- African Coelacanth Ecosystem Programme (ACEP), South Africa C Sparks --- Cape Peninsula University of Technology, South AfricaSimilarities in the marine fauna found off the coasts of southern Madagascar and KwaZulu-Natal Province (KZN), South Africa, led to the development of the ‘suitcase project,’ with the aim of establishing whether eddies that form off southern Madagascar may package... -
Transport and transformation of surface water masses across the Mascarene Plateau during the Northeast Monsoon season
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Vianello --- Nansen-Tutu Centre for Marine Environmental Research, South Africa IJ Ansorge --- Department of Oceanography, Marine Research Institute, South Africa M Rouault --- Nansen-Tutu Centre for Marine Environmental Research, South Africa M Ostrowski --- Institute of Marine Research, NorwayThe Mascarene Plateau lies in the south-west Indian Ocean between the islands of Mauritius and the Seychelles Bank, and is characterised by a series of shallow banks separated by deep (>1 000 m), narrow channels. The plateau acts as an... -
Coalition formation, mate selection and pairing behaviour of the Crested Francolin
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Johann H van Niekerk --- Department of Environmental Sciences, South AfricaTransect field observations were conducted on the behaviour of Crested Francolin Dendroperdix sephaena to describe male coalitions in the Borakalalo National Park, North West province, South Africa during May, August, October and December 2008, and again in July 2009. Crested... -
Realised genetic gains and estimated genetic parameters of two Eucalyptus grandis × E. urophylla hybrid breeding strategies
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Gert J van den Berg --- Mondi Forests (Pty) Ltd, South Africa Steven D Verryn --- Faculty of Natural and Agricultural Sciences, South Africa Paxie W Chirwa --- Faculty of Natural and Agricultural Sciences, South Africa Francois van Deventer --- Mondi Forests (Pty) Ltd, South AfricaConventionally, Eucalyptus grandis × E. urophylla (GU) hybrid material is first tested as seedlings in progeny trials for at least four years before ortets are selected and ramets of the selected ortets are propagated to test in clonal trials. The... -
Role of site in the mortality and production of Acacia mangium plantations in Indonesia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Marcus Hardie --- Tasmanian Institute of Agriculture, University of Tasmania, Australia Nawari Akhmad --- Research and Development RAPP, APRIL Group, Indonesia Caroline Mohammed --- Tasmanian Institute of Agriculture, University of Tasmania, Australia Daniel Mendham --- CSIRO Ecosystem Sciences and Sustainable Agriculture Flagship, Australia Ross Corkrey --- Tasmanian Institute of Agriculture, University of Tasmania, Australia Abdul Gafur --- Research and Development RAPP, APRIL Group, Indonesia Sabar Siregar --- Research and Development RAPP, APRIL Group, IndonesiaIn Indonesia, Acacia mangium plantations exceed 1.6 Mha contributing approximately 3.5% of the country’s GDP. The viability of these plantations is increasingly threatened by fungal pathogens, insect pests, squirrels, monkeys, elephants and wind damage. Studies indicate that the problem is... -
Primary Health Care in South West Nigeria: Evaluating service quality and patients' satisfaction
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Omoseni O. Adepoju --- School of Management Technology, Nigeria Zacheus Opafunso --- School of Management Technology, Nigeria Modupe Ajayi --- School of Management Technology, NigeriaPrimary health care (PHC) is a fundamental, cost-effective approach in delivering essential healthcare services to achieve quality life for all. This study assesses service quality and patient satisfaction in the PHC sector in South West Nigeria. A multi-stage sampling approach... -
Intravenous paracetamol — waste not, want not: a retrospective audit on the appropriate use of intravenous paracetamol at Universitas Academic Hospital Complex—Bloemfontein
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: NJ Procter --- Department of Anaesthesiology, South Africa G Lamacraft --- Department of Anaesthesiology, South Africa G Joubert --- Department of Biostatistics, South AfricaBackground: Paracetamol can be given both orally and intravenously (IV) with similar clinical efficacy, but the IV formulation is 360 times more expensive. IV paracetamol is therefore only recommended when the oral route is not available. This study investigated whether... -
‘Treating a patient should be approached in a holistic manner’: collaboration of doctors and physiotherapists in the rehabilitation of people living with HIV
Item type: Journal Article • Journal: South African Family Practice • Authors: Stacy Maddocks --- Physiotherapy, School of Health Sciences, South Africa Verusia Chetty --- Physiotherapy, School of Health Sciences, South Africa Arishna Maghoo --- Physiotherapy, School of Health Sciences, South Africa Nkuleleko Mhlongo --- Physiotherapy, School of Health Sciences, South Africa Nsindiso Mthembu --- Physiotherapy, School of Health Sciences, South Africa Sinempilo Khanyile --- Physiotherapy, School of Health Sciences, South Africa Siphokazi Chiliza --- Physiotherapy, School of Health Sciences, South Africa Tyrel Munsamy --- Physiotherapy, School of Health Sciences, South Africa Zanele Gamede --- Physiotherapy, School of Health Sciences, South Africa Slindile Mazibukoc --- Physiotherapy, School of Health Sciences, South AfricaPeople living with HIV facing impairments and subsequent disabilities related to the virus and its treatment require involvement of a collaborative team of healthcare professionals to ensure reintegration into daily life and community living. Healthcare teams responsible for this care... -
Fluoroquinolone-resistant Salmonella typhi infection: a report of two cases in South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: N Schellack --- School of Pharmacy, South Africa E Bronkhorst --- School of Pharmacy, South Africa C Maluleka --- Department of Microbiology, South Africa L Hunt --- The Ohio State University Wexner Medical Center, USA P Srinivas --- The Ohio State University Wexner Medical Center, USA W Grootboom --- School of Pharmacy, South Africa D Goff --- The Ohio State University Wexner Medical Center, USA P Naicker --- School of Pharmacy, South Africa T Modau --- School of Pharmacy, South Africa O Babarinde --- School of Pharmacy, South AfricaTyphoid and paratyphoid fever are acute, life-threatening febrile illnesses caused by systemic infection with the bacterium Salmonella enterica. Nineteen cases were reported in South Africa in 2016. We report on two cases of bacteraemic invasive S. typhi with fluoroquinolone resistance. -
Jail duration, demographic characteristics of offenders, and acquired suicide capability
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ajiboye Isaac Oyeleke1 --- Department of Social Work / Social Development, South Africa Pius TangweTanga --- Department of Social Work / Social Development, South Africa Ajibola Abdulrahamon Ishola --- Department of Psychology, NigeriaThe study sought to predict the acquired capability for suicide from length of sentence and socio-demographic characteristics of offenders in a Nigerian prison population. Participants were 139 inmates (mean age = 33.67, SD = 9.24years; mean length of stay = 6.25 years, SD = 5.02years), males (95.7%), They... -
Psychological functioning and well-being among Ghanaian women: A brief report
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ethel Akpene Atefoe --- Department of Psychological Medicine and Mental Health, School of Medicine, Ghana Nuworza Kugbey --- Department of Family and Community Health, School of Public Health, GhanaThis study examined correlates of psychological well-being and distress among women in Accra, Ghana. A total of 200 women between 18 and 65 years completed measures of psychological well-being and distress. Independent t-test and One-way ANOVA F-test analysis of the... -
‘Inhliziyo ekhombisa uthando’: Exploring children’s conceptions of spirituality
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Gugulethu M. Hlatshwayo --- School of Education, College of Humanities, South Africa Nithi Muthukrishna --- School of Education, College of Humanities, South Africa Melanie Martin --- School of Education, College of Humanities, South AfricaIn this study we explored young isiZulu children’s conceptions of spirituality. The children (n = 8; females = 5; male = 3) were nine to eleven years old and attended a primary school in KwaZulu-Natal, South Africa. They drew pictures... -
Workers in the luxury hospitality industry and motivation – the influence of gender, age and departments
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Ambra Hekman --- Hotel Management School, The Netherlands Conrad Lashley --- Hotel Management School, The NetherlandsThis research was conducted to find out whether demographics such as age, gender and working within different departments have an influence on the motivational factors of workers in the luxury hospitality industry. Questionnaires were filled out by 39 employees from... -
Population connectivity of an overexploited coastal fish, Argyrosomus coronus (Sciaenidae), in an ocean-warming hotspot
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Henriques --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South Africa CV Santos --- Faculdade de Ciências da Universidade Agostinho Neto (FCUAN), Angola WHH Sauer --- Department of Ichthyology and Fisheries Science, South Africa PW Shaw --- Department of Ichthyology and Fisheries Science, South AfricaThe West Coast dusky kob Argyrosomus coronus is a commercially exploited fish with a distribution confined to the Angola–Benguela Frontal Zone (ABFZ) of the southeastern Atlantic Ocean. A previous study revealed that during a recent period of local warming the... -
Survival estimates for the greater crested tern Thalasseus bergii in southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Payo-Payo --- Group of Ecology and Animal Demography (GEDA), Spain A Sanz-Aguilar --- Group of Ecology and Animal Demography (GEDA), Spain D Gaglio --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa RB Sherley --- Environment and Sustainability Institute, University of Exeter, United Kingdom TR Cook --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa R Altwegg --- Statistics in Ecology, Environment and Conservation, Department of Statistical Sciences, and African Climate and Development Initiative, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaThe nominate race of the greater crested tern Thalasseus bergii breeds only along the coast of the Benguela region (west coast) of southern Africa, where its population is increasing, in contrast to other species of breeding seabirds in the region... -
Classification of marine bioregions on the east coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T-C Livingstone --- Ezemvelo KZN Wildlife, South Africa JM Harris --- Ezemvelo KZN Wildlife, South Africa AT Lombard --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa AJ Smit --- Department of Biodiversity and Conservation Biology, South Africa DS Schoeman --- School of Science and Engineering, AustraliaMarine bioregional planning requires a meaningful classification and spatial delineation of the ocean environment using biological and physical characteristics. The relative inaccessibility of much of the ocean and the paucity of directly measured data spanning entire planning regions mean that... -
Metabolic activity throughout early development of dusky kob Argyrosomus japonicus (Sciaenidae)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Edworthy --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa B Erasmus --- Department of Ichthyology and Fisheries Science, South Africa JOG Kemp --- Department of Ichthyology and Fisheries Science, South Africa H Kaiser --- Department of Ichthyology and Fisheries Science, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe physiology of fishes in the early stages of development remains poorly assessed despite the importance of identifying energy bottlenecks in organisms faced with changing environmental conditions. This study describes the metabolic activity of dusky kob Argyrosomus japonicus throughout its... -
First insights on spatial and temporal distribution patterns of humpback whales in the breeding ground at Sainte Marie Channel, Madagascar
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Trudelle --- Bioacoustics Team, France J-B Charrassin --- Sorbonne Universités (UPMC, Univ. Paris 06) – CNRS-IRD-MNHN, LOCEAN-IPSL, France A Saloma --- Cétamada, Port Barachois, Madagascar S Pous --- Sorbonne Universités (UPMC, Univ. Paris 06) – CNRS-IRD-MNHN, LOCEAN-IPSL, France A Kretzschmar --- Biostatistiques et Processus Spatiaux (BioSP), France O Adam --- Bioacoustics Team, FranceThe Sainte Marie Channel on the northeast coast of Madagascar is an important breeding ground for humpback whales; the first observation of birth was documented there, yet it has never been investigated for phenology and habitat use of humpback whales... -
Use of diatom indices to categorise impacts on and recovery of a floodplain system in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Musa --- Department of Zoology, South Africa R Greenfield --- Department of Zoology, South AfricaThe trophic status of the Ramsar-accredited Nyl River floodplain, which is stressed by sewage treatment effluents, and its ability to restore normal conditions, were assessed in 2014–2015 using diatoms as biological indicators. The Trophic Diatom Index, Specific Pollution Sensitivity Index... -
Influences of the arbuscular mycorrhizal fungus Glomus mosseae on morphophysiological traits and biochemical compounds of common bean (Phaseolus vulgaris) under drought stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Ali Ganjeali --- Department of Biology, Faculty of Sciences, Iran Elham Ashiani --- Department of Biology, Faculty of Sciences, Iran Maryam Zare --- Department of Biology, Faculty of Sciences, Iran Elahe Tabasi --- Department of Biology, Faculty of Sciences, IranThe symbiosis of arbuscular mycorrhizae (AM) with plant roots can enhance plant responses, especially to drought stress. An experiment was conducted in a growth chamber to examine the impacts of arbuscular mycorrhizae on improving the drought tolerance of common bean... -
Peatland substrates in northern KwaZulu-Natal: a study of the forming environments, properties and an approach towards classification
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marvin Gabriel --- Faculty of Life Science, Germany Camelia Toader --- Faculty of Mathematics and Natural Sciences, Germany Franziska Faul --- Faculty of Earth and Environmental Sciences, Germany Niko Roßkopf --- Faculty of Life Science, Germany Piet-Louis Grundling --- Centre for Environmental Management, South Africa Cornelius Wilhelm van Huyssteen --- Department of Soil, Crop, and Climate Sciences, South Africa Jutta Zeitz --- Faculty of Life Science, GermanyPeatlands in South Africa are rare and fulfil important ecological functions but are threatened by degradation. Because of this peatlands have gained increasing attention from scientists during the last two decades. However, knowledge of the peatland substrates and the means... -
Assessment of noise-levels of generator-sets in seven cities of South-Southern Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Osagie Ibhadode --- Building Research Department, Nigeria I. T. Tenebe --- Department of Civil Engineering, Nigeria P. C. Emenike --- Department of Civil Engineering, Nigeria O. S. Adesina --- Dept. of Mathematical Science, Nigeria A. F. Okougha --- Science Laboratory Technology Research Department, Nigeria F. O. Aitanke --- Department of Production Engineering, NigeriaNoise pollution has been shown to be a global health hazard and this could be aggravated by the use of noise-emitting generators. Therefore, this study aims to determine the Sound Pressure Levels Sound Power Levels as well as Noisiness of... -
Soil quality effects on regeneration of annual Medicago pastures in the Swartland of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Pieter A Swanepoel --- Department of Agronomy, South Africa Flackson Tshuma --- Department of Agronomy, South AfricaAnnual medic (Medicago spp.) pastures are widely used as the forage component of crop rotation systems in the Mediterranean region of South Africa. Reliable establishment of medics can be challenging. This may be related to poor soil quality, an inherent... -
Vegetation gradients around cattleposts in the eastern mountains of Lesotho
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Craig Morris --- Agricultural Research Council–Animal Production Institute, c/o School of Life Sciences, South AfricaThe grasslands of the mountains in eastern Lesotho support large numbers of sheep, angora goats and other livestock during the summer, during which they are corralled nightly by herders at cattleposts. Few studies, however, have quantified the impact of grazing... -
Alcohol use and problem drinking in South Africa: Results from a national-population-based survey 2014-2015
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- HIV/AIDS/STIs/and TB (HAST), South Africa Supa Pengpid --- Department of Research and Innovation, South AfricaThe aim of this study was to estimate the pattern of alcohol use among South African adults by their socio-demographic and health status indicators. We analysed data from a 2014–2015 South African national population-based survey which sampled 22 752 adults... -
Literacy programs efficacy for developing children’s early reading skills in familiar language in Zambia
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Francis K. Sampa --- Read To Succeed, Zambia Emma Ojanen --- Department of Psychology, Finland Jari Westerholm --- Research, Niilo Mäki Institute, Finland Ritva Ketonen --- Faculty of Educational Sciences, Finland Heikki Lyytinen --- Department of Psychology, FinlandThis study investigated the comparative efficacy of a phonics-based reading program and a language experience approach based literacy program to develop reading skills among Zambian early childhood school learners. The learners (n = 1 986; Grade 2 level; females =... -
Demographic correlates of normative beliefs about aggression among adolescents from low income communities in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Anita Padmanabhanunni --- Department of Psychology, South Africa Martin Gerhardt --- Department of Psychology, South AfricaThe present study investigated the association of age, gender, and family size with normative beliefs about aggression among South African adolescents from low-income areas. Adolescents (n = 229; mean age = 16 years; female = 61%) completed the Normative Beliefs... -
Sexing Cape Vulture Gyps coprotheres based on head morphometrics
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Margaret T Hirschauer --- VulPro NPC, Skeerpoort, South Africa Tapiwa Zimunya --- VulPro NPC, Skeerpoort, South Africa Kerri Wolter --- VulPro NPC, Skeerpoort, South Africa Ara Monadjem --- All Out Africa Research Unit, Department of Biological Sciences, SwazilandThe Cape Vulture Gyps coprotheres is considered sexually monomorphic in the literature, but visual differences in head shape between the sexes have been observed. Furthermore, head morphometrics of other Gyps species show statistically significant variation between the sexes. We show... -
Retention of the flight-adapted avian finger-joint complex in the Ostrich helps identify when wings began evolving in dinosaurs
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Joel D Hutson --- Department of Biological Sciences, USA Kelda N Hutson --- Earth Science, USAThe functional anatomies of avian finger joints have never been compared with those of the basal avian Archaeopteryx lithographica or maniraptoran theropod dinosaurs. These startling oversights are due to unfamiliarity of the joints outside of highly specialised studies of bird-wing... -
How many can you catch? Factors influencing the occurrence of multi-prey loading in provisioning Greater Crested Terns
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Davide Gaglio --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Timothée R Cook --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Richard B Sherley --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Peter G Ryan --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South AfricaSeabirds use several methods to transport food to their chicks; most species carry food in their stomachs or crops, but some terns and auks carry prey in their bills. Terns usually only carry one prey item at a time, limiting... -
Cryptic diversity in the common flap-necked chameleon Chamaeleo dilepis in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Devon C Main --- Centre for Ecological Genomics and Wildlife Conservation, South Africa Bettine Jansen van Vuuren --- Centre for Ecological Genomics and Wildlife Conservation, South Africa Krystal A Tolley --- Centre for Ecological Genomics and Wildlife Conservation, South AfricaThe spatial genetic structure of a species, and whether distinct genetic lineages are present, is strongly influenced by their biology and habitat requirements. Given habitat specificity and low vagility, many herpetofaunal species are reservoirs for high levels of cryptic diversity;... -
First genetic data for band-winged grasshoppers (Orthoptera: Acrididae: Oedipodinae) of the Biskra region of Algeria with new records for the country
Item type: Journal Article • Journal: African Zoology • Authors: Abdelhamid Moussi --- Laboratory Valorization and Conservation of Natural Resources, Algeria Lara-Sophie Dey --- General Zoology, Germany Daniel Petit --- UMR 1061 Inra, France Abderrahmane Abba --- Laboratory Valorization and Conservation of Natural Resources, Algeria Robert Klesser --- General Zoology, Germany Martin Husemann --- Centrum für Naturkunde, GermanyDNA barcoding represents an objective tool for fast species identification, especially for taxa for which morphological identification is difficult. One current limitation of barcoding is the lack of reference sequences for many groups. While many European and North American countries... -
Donald George Broadley: Bibliography, taxonomic discoveries and patronyms
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: William R. Branch --- , , South Africa Michael F. Bates --- , South AfricaDonald G. Broadley was one of Africa’s most prolific recent authors. He produced over 410 articles, including numerous comprehensive and detailed taxonomic reviews of lizard and snake genera. A review of his scientific publications spanning over 50 years of herpetological... -
New species of Mongrel Frogs (Pyxicephalidae: Nothophryne) for northern Mozambique inselbergs
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Werner Conradie --- , South Africa Gabriela B. Bittencourt-Silva --- , , Switzerland Harith M. Farooq --- , , Mozambique Simon P. Loader --- , United Kingdom Michele Menegon --- , , Italy Krystal A. Tolley --- , , South AfricaNothophryne Poynton, 1963 is a monotypic genus of frog, with the nominal species N. broadleyi found only on Mount Mulanje, in southern Malawi. Recent surveys in northern Mozambique, however, have uncovered at least four new species associated with four inselbergs... -
An Evaluation Of The Collaborative Coursework-Based Phd Program In Economics And Management Among East African National Universities
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Almas Heshmati --- Department of Economics, Republic of Korea Lars Hartvigson --- Jönköping International Business School, Jönköping University, SwedenRapid economic growth in many sub-Saharan African countries and the consolidation of the lower education sector implies that it is becoming increasingly important to meet the demand for higher education institutions. The expansion of existing national research institutions is facing... -
Technological capabilities in the Indian Ayurveda medicine industry: Lessons for ‘industrialisation’ of alternative medicine in the post-WTO regime
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Abha Arya --- Centre for Studies in Science Policy, India Saradindu Bhaduri --- Centre for Studies in Science Policy, IndiaThis paper makes an attempt to explore technological change as well as the motivations and pattern of technological capabilities in the Indian Ayurveda medicine industry. It seeks to investigate the different kinds of learning and technological innovations taking place in... -
Alternative method for the identification of critical nodes leading to voltage instability in a power system
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Isaiah G. Adebayo --- Department of Electrical Engineering, South Africa Adisa A. Jimoh --- Department of Electrical Engineering, South Africa Adedayo A. Yusuff --- Department of Electrical and Mining Engineering, South Africa Yanxia Sun --- Department of Electrical and Electronic Engineering Science, South AfricaThe introduction of new operation enhancement technologies plus increasing application of power electronics, coupled with the continuous increase in load demand, has increased the risk of power networks to voltage instability and susceptibility to voltage collapse. This frequent occurrence of... -
Prediction of primary salinity, sodicity and alkalinity in South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J Piet Nell --- Agricultural Research Council–Institute for Soil, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Science, South AfricaSeveral attempts have in the past been made to map the primary salinity, sodicity and alkalinity of South African soils. These have typically been based on personal experience and/or limited data and also failed to quantify the accuracy of prediction... -
Analysis of phenotypic variability for yield and quality traits within a collection of cassava (Manihot esculenta) genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Athanase Nduwumuremyi --- African Centre for Crop Improvement, South Africa Rob Melis --- African Centre for Crop Improvement, South Africa Paul Shanahan --- African Centre for Crop Improvement, South Africa Asiimwe Theodore --- Rwanda Agriculture Board, RwandaGenetic diversity is essential for crop improvement and knowledge of the genetic variability within a breeding population facilitates its future exploitation. This study examined the phenotypic and genetic variability for specific cassava key traits in a collection of 30 genotypes... -
Phenotypic characterisation of potato (Solanum tuberosum) genotypes in Uganda
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Prossy Namugga --- African Centre for Crop Improvement, School of Agricultural, Earth and Environmental Sciences, South Africa Julia Sibiya --- African Centre for Crop Improvement, School of Agricultural, Earth and Environmental Sciences, South Africa Rob Melis --- African Centre for Crop Improvement, School of Agricultural, Earth and Environmental Sciences, South Africa Alex Barekye --- Kachwekano Zonal Agricultural Research and Development Institute, UgandaIdentification of genetic variation and interrelationships among germplasm collections is essential for parental selection and trait identification among parents for use in breeding programmes. The aim of this study was to characterise 48 potato genotypes to identify suitable parents for... -
Novel technique for reversing phrenic nerve paresis secondary to interscalene brachial plexus block
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Ian O Fleming --- Department of Anaesthesia and Pain Medicine, Australia Krishna Boddu --- Department of Anaesthesia and Pain Medicine, AustraliaInterscalene brachial plexus block is the reference analgesic technique for shoulder surgery. Phrenic nerve palsy with hemidiaphragmatic paresis is an established complication that results in symptomatic dyspnoea in a small number of subjects, and is poorly tolerated. Established management is... -
Anthropometric profile and complications in patients with diabetes mellitus seen at Maluti Adventist Hospital, Lesotho
Item type: Journal Article • Journal: South African Family Practice • Authors: MT Makwero --- Department of Family Medicine, South Africa WF Mollentze --- Department of Internal Medicine, South Africa G Joubert --- Department of Biostatistics, South Africa WJ Steinberg --- Department of Family Medicine, South AfricaBackground: Patients attending outpatient departments for follow-up of diabetes mellitus (DM) may seem content about the control of their disease. However, complications resulting from DM may present before diagnosis and treatment initiation or continue to develop while on treatment. -
Detection of amoeba-associated Legionella pneumophila in hospital water networks of Johannesburg
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: P Muchesa --- Water and Health Research Centre, Faculty of Health Sciences, South Africa M Leifels --- Department of Hygiene, Social and Environmental Medicine, Germany L Jurzik --- Department of Hygiene, Social and Environmental Medicine, Germany TG Barnard --- Water and Health Research Centre, Faculty of Health Sciences, South Africa C Bartie --- Water and Health Research Centre, Faculty of Health Sciences, South AfricaThe prevalence of free-living amoeba and associated Legionella spp. in hospital water systems may pose a risk of Legionnaires’ disease to immuno-compromised patients. This study investigated the occurrence of amoeba-associated Legionella pneumophila in three South African hospital water systems. A... -
Acute toxicity effects of ibuprofen on behaviour and haematological parameters of African catfish Clarias gariepinus (Burchell, 1822)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EO Ogueji --- Department of Fisheries and Aquaculture, Nigeria CD Nwani --- Department of Zoology and Environmental Biology, Nigeria SC Iheanacho --- Department of Fisheries and Aquaculture, Nigeria CE Mbah --- Department of Zoology, Zaria CO Okeke --- Department of Biology/Microbiology/Biotechnology, Nigeria A Yaji --- Department of Fisheries, NigeriaIndiscriminate discharge of pharmaceutical waste into the aquatic ecosystem may pose serious health challenges to aquatic biota. The effect of acute exposure to ibuprofen was evaluated using changes in behaviour and haematological parameters under static bio-assay method in Clarias gariepinus... -
Mozambican immigrants to South Africa: Their xenophobia and discrimination experiences
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Miriam Moagi --- Department of Nursing Science, Faculty of Health Sciences, South Africa Gail Wyatt --- Department of Psychiatry and Bio-behavioral Sciences, USA Maboe Mokgobi --- Faculty of Social and Health Sciences, South Africa Tamra Loeb --- Department of Psychiatry and Bio-behavioral Sciences, USA Muyu Zhang --- Department of Psychiatry and Bio-behavioral Sciences, USA Mashudu Davhana-Maselesele --- North-West University, South AfricaWe explored Mozambican immigrants’ lived experiences of xenophobia and discrimination in South Africa. Informants were 15 Mozambican immigrants (female = 7, male = 8) living in an informal settlement in Zandspruit, Gauteng Province. They completed open-ended written narratives on xenophobic... -
Spirituality as a coping mechanism for family caregivers of persons with aphasia
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Khetsiwe Phumelele Masuku --- Department of Speech Pathology and Audiology, South Africa Katijah Khoza-Shangase --- Department of Speech Pathology and Audiology, South AfricaThis study sought to describe spirituality resourcing of family caregivers for people with aphasia (PWA). A purposive sample of 14 female family caregivers of PWA from a historically disadvantaged South African community were participants (married = 42%; age range 21... -
Cell phone usage relational regulation strategies of older South Africans
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sandra Steyn --- Optentia Research Focus Area, South Africa Vera Roos --- Optentia Research Focus Area, South Africa Karel Botha --- Community Psychosocial Research (COMPRES), South AfricaThis study explored older South Africans’ relational regulation strategies in using their cell phones to address their social goals and psychosocial needs. Nineteen older South Africans (17 female; 2 male), aged 60 and older, who had access to a cell... -
Biology of Litosermyle ocanae in Colombian Pinus patula plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos A Rodas --- Forest Health Protection Programme, Colombia Brett P Hurley --- Department of Zoology and Entomology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa María D Bolaños --- Forest Health Protection Programme, Colombia Ginna M Granados --- Forest Health Protection Programme, Colombia Michael J Wingfield --- Department of Zoology and Entomology, Forestry and Agricultural Biotechnology Institute (FABI), South AfricaPlantations of Pinus spp. in Colombia are severely damaged by various phasmid (Phasmatodea: Diapheromeridae) insects. Of these, Litosermyle ocanae is one of the most serious defoliators. Since 1988, several outbreaks have been recorded in Pinus patula plantations, resulting in substantial... -
Secondary Nothofagus dombeyi forests: site index curves and dominant height in the Coastal Range of south-central Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos Esse --- Escuela de Ciencias Ambientales, Nucleo de Estudios Ambientales, Chile Pablo J Donoso --- Instituto de Bosques y Sociedad, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Chile Victor Gerding --- Instituto de Bosques y Sociedad, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Chile Francisco Encina-Montoya --- Escuela de Ciencias Ambientales, Nucleo de Estudios Ambientales, Chile Celso Navarro --- Escuela de Ciencias Ambientales, Nucleo de Estudios Ambientales, ChileNothofagus dombeyi is distributed on very diverse sites in the temperate forests of Chile and Argentina. In Chile, studies on its dynamics and productivity in forests, where it is the dominant species, have been carried out mainly in the foothills... -
A comparison of the cost-effectiveness of different eucalypt cut-stump control management options to reduce competition from coppice regrowth during stand establishment in Mpumalanga, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jonathan C Roberts --- School of Natural Resource Management, South Africa Keith M Little --- School of Natural Resource Management, South Africa Marnie E Light --- Institute for Commercial Forestry Research, South AfricaSelected cut-stump (Cut_surface) and basal frill (Basal_frill) treatments were tested on Eucalyptus macarthurii cut stumps that had previously been coppiced multiple times. Treatments included the application of herbicide (triclopyr as an amine salt, 360 g L−1), either to the cut-surface... -
Genetic variability of the Lessepsian migrant mussel Brachidontes pharaonis (Bivalvia: Mytilidae) in Tunisia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Antit --- UR11ES12 Biologie de la Reproduction et du Développement animal, Faculté des Sciences de Tunis, Tunisia N Amor --- KSU Mammals Research Chair, Department of Zoology, Saudi Arabia J Urra --- Oceanographic Center of Málaga–Spanish Institute of Oceanography, Spain AN Alagaili --- KSU Mammals Research Chair, Department of Zoology, Saudi Arabia S Farjallah --- Unité de Recherche de Biologie Intégrative et Ecologie Évolutive et Fonctionnelle des Milieux aquatiques, Faculté des Sciences Tunis, TunisiaThe present study used two mitochondrial markers (16S rRNA and COI) to assess the genetic diversity of a newly founded Lessepsian migrant mussel, Brachidontes pharaonis, in Tunisian waters. The species appears to be restricted to only one population in Rades... -
A practical guide to the interpretation of PK/PD profiles of longer-acting analogue insulins. Part two: Insulin degludec vs. insulin glargine U300
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Oppel Bw Greeff --- Department of Pharmacology, South Africa Jacob John van Tonder --- Triclinium Clinical Development (Pty) Ltd, South Africa Kershlin Naidu --- Department of Internal Medicine, South Africa Alicia McMaster --- Sanofi-Aventis South Africa (Pty) Ltd, South Africa Alet van Tonder --- Sanofi-Aventis South Africa (Pty) Ltd, South Africa Rashem Mothilal --- Sanofi-Aventis South Africa (Pty) Ltd, South AfricaGlucose clamp studies form an integral part of the early development of insulin therapies. Data generated in these studies are used to establish pharmacokinetic (PK) and pharmacodynamic (PD) profiles of the agents, but methodological differences confound comparison of results from... -
Evaluation of satellite retrievals of water quality parameters for Lake Victoria in East Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Gidudu --- Department of Geomatics and Land Management, Uganda R Mugo --- Regional Centre for Mapping Resource for Development, Nairobi Kenya L Letaru --- Department of Geomatics and Land Management, Uganda J Wanjohi --- Regional Centre for Mapping Resource for Development, Nairobi Kenya R Nakibule --- Department of Geomatics and Land Management, Uganda E Adams --- Earth System Science Centre–University of Alabama in Huntsville, USA A Flores --- Earth System Science Centre–University of Alabama in Huntsville, USA B Page --- Earth System Science Centre–University of Alabama in Huntsville, USA W Okello --- National Fisheries Resources Research Institute, UgandaLake Victoria in East Africa is a major ecosystem, whose size and importance has warranted the exploration of MODIS imagery to provide continuous and accurate water quality information. To this effect, two sea expeditions (in November 2014 and February 2015)... -
Can the presence of curved forms of the diatom Aulacoseira ambigua in the Nile (Egypt) and Vaal (South Africa) Rivers be ascribed to similar water quality conditions?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Janse van Vuuren --- Unit for Environmental Sciences and Management, South Africa AA Saber --- Botany Department, Faculty of Science, Egypt A Swanepoel --- Rand Water, Scientific Services, South Africa M Cantonati --- MUSE-Museo delle Scienze, Limnology and Phycology Section, ItalySpiral colonies of the diatom Aulacoseira ambigua were assigned the rank of forma (Aulacoseira ambigua f. japonica). This spiral-shaped, colonial, centric diatom has limited geographical distribution and is currently reported to occur in only a few countries in the world... -
Trophic state and nutrient limitation in Lake Baringo, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EO Okech --- Department of biological sciences, Kenya N Kitaka --- Department of biological sciences, Kenya SO Oduor --- Department of biological sciences, Kenya D Verschuren --- Department of Biology, BelgiumThe trophic state of Lake Baringo and factors that could be limiting the development of algal biomass in it were investigated during one wet/dry hydrological cycle in 2014–2015. Water samples were analysed for dissolved inorganic nutrients, including , and ,... -
Cyanotoxins in small artificial dams in Kenya utilised for cage fish farming – a threat to local people?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MN Kaggwa --- Department of Limnology and Oceanography, Austria N Straubinger-Gansberger --- Department of Limnology and Oceanography, Austria M Schagerl --- Department of Limnology and Oceanography, AustriaNine small artificial dams located in different climatic regions of Kenya were studied. The local communities use the stored water for various purposes, such as irrigation, domestic use, watering of livestock and cage fish farming. Such intense use is commonly... -
Evidence for diet partitioning among three coexisting native freshwater fishes in South Africa's Cape Fold Ecoregion
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JM Shelton --- Freshwater Research Centre (FRC), South Africa MS Bird --- Department of Zoology, South Africa SM Marr --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaThe partitioning of limited resources commonly explains how different species can coexist within the same ecological community. In this 2010 study, the diets of three coexisting freshwater fishes (Cape galaxias Galaxias zebratus, n = 27; Cape kurper Sandelia capensis, n... -
Characteristics and outcome of patients with pheochromocytoma at a tertiary endocrinology clinic in Durban, South Africa over 14 years
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Abdurraouf Esseid Zorgani --- Department of Diabetes and Endocrinology, South Africa Fraser J Pirie --- Department of Diabetes and Endocrinology, South Africa Ayesha A Motala --- Department of Diabetes and Endocrinology, South AfricaObjectives: To evaluate the characteristics and outcomes of treatment of patients with pheochromocytoma at Inkosi Albert Luthuli Central Hospital (ILACH) in Durban, South Africa over 14 years. -
Anaesthetists’ knowledge of surgical antibiotic prophylaxis: a prospective descriptive study
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: J. Jocum --- Department of Anaesthesiology, South Africa W. Lowman --- Wits Donald Gordon Medical Centre, South Africa H. Perrie --- Department of Anaesthesiology, South Africa J. Scribante --- Department of Anaesthesiology, South AfricaBackground: Surgical site infection (SSI) is the second most common hospital-acquired infection and results in increased morbidity and mortality and a longer hospital stay. Surgical antibiotic prophylaxis (SAP) is one component of broader strategies to reduce rates of SSI. Adherence... -
Relationship between nutritional status and treatment-related neutropenia in children with nephroblastoma
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Kelly S Draper --- Dietetics and Human Nutrition, South Africa GP Hadley --- Department of Paediatric Surgery, South Africa Kirthee Pillay --- Dietetics and Human Nutrition, South Africa Nicola L Wiles --- Dietetics and Human Nutrition, South AfricaBackground: Assessment of nutritional status of paediatric oncology patients is crucial, as it may influence treatment and clinical outcomes. Concurrent malnutrition and cancer in children may lead to reduced chemotherapy delivery due to impaired tolerance and increased toxicity. -
Typhoid ileal perforation in a semi-urban tertiary health institution in north-eastern Nigeria
Item type: Journal Article • Journal: South African Family Practice • Authors: BA Grema --- Family Medicine Department, Aminu Kano Teaching Hospital Kano, Nigeria I Aliyu --- Paediatric Department, Aminu Kano Teaching Hospital, Nigeria GC Michael --- Family Medicine Department, Aminu Kano Teaching Hospital Kano, Nigeria A Musa --- Surgery Department, Federal Medical Center Nguru, Nigeria AG Fikin --- Family Medicine Department, Federal Medical Center Nguru, Nigeria BM Abubakar --- Surgery Department, Federal Medical Center Nguru, Nigeria S Olusegun --- Surgery Department, Federal Medical Center Nguru, NigeriaIntroduction: Typhoid ileal perforation is a very serious complication of typhoid fever and remains a significant surgical problem in developing countries like Nigeria, where it is associated with higher mortality and morbidity, due to lack of adequate clean drinking water,... -
Presence and absence: shops as traces of hopes in apartheid Namibia
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Gregor Dobler --- Institute for Social and Cultural Anthropology, Albert-Ludwigs University of Freiburg, Freiburg im Breisgau, GermanyThis photo essay shows images of closed-down shops in rural northern Namibia, businesses that flourished in the context of an apartheid homeland but had to shut down when democracy opened up the area to competition and urbanisation. The photographs are... -
A reflection on a visual ethnography of Namibia
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Rosa Persendt --- Contemporary Social Issues Unit, Office of the Pro-Vice-Chancellor (Academic Affairs), NamibiaIn this essay, Rosa Persendt reflects on Gregor Dobler's photo essay “Presence and Absence: Shops as Traces of Hopes in Apartheid Namibia” which deals with ethnographic photos taken of empty cucu [trading stores] opened in the early 1950s and the... -
Health-related subjective well-being with emetophobia
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Anuscha Liebenberg --- Department of Psychology, South Africa Monika dos Santos --- Department of Psychology, South AfricaThis study explored subjective well-being among white females with emetophobia disorder (n = 20, married = 50%, age range 20–25). The participants completed self-report measures of gastrointestinal symptoms, as well as the Gastrointestinal Symptom Severity Index and Gastrointestinal Symptoms-Related Subjective... -
Trauma event autobiographies: An exploratory multiple case study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Corné Engelbrecht --- Department of Psychology, South Africa Maria Papaikonomou --- Department of Psychology, South AfricaThis multiple case study explored trauma event memories of three individuals to characterise underlying meanings important for their recovery. The three participants were women in the age range of 43 to 54 years old, who shared their own memories of... -
Concurrent tobacco use and risky drinking in South Africa: Results from the South African National Health and Nutrition Examination Survey
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Nancy Phaswana-Mafuya --- Deputy Vice Chancellor Research and Innovation Office, South Africa Karl Peltzer --- Deputy Vice Chancellor Research and Innovation Office, South Africa Supa Pengpid --- ASEAN Institute for Health Development, ThailandThe aim of this study was to examine socio-demographic and psychosocial correlates of concurrent tobacco use and risky drinking. We analysed data from the cross-sectional South African National Health and Nutrition Examination Survey (SANHANES-1) 2011–2012. The sample included 14 764... -
Identifying phenological functional types in savanna trees
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Nthambeleni D Masia --- Council for Scientific and Industrial Research, Natural Resources and the Environment, South Africa Nicola Stevens --- Global Change and Biodiversity Group, Department of Botany and Zoology, South Africa Sally Archibald --- Council for Scientific and Industrial Research, Natural Resources and the Environment, South AfricaSavannas are notable for the varied patterns of leaf display in the tree layer. Characterising this variation, and assessing the range of phenological strategies apparent in savanna ecosystems will be helpful for understanding savanna tree life-histories and their response to... -
Essential oil composition of Pentzia incana (Asteraceae), an important natural pasture plant in the Karoo region of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Isabel M Hulley --- Department of Botany and Plant Biotechnology, South Africa Nicholas J Sadgrove --- Department of Botany and Plant Biotechnology, South Africa Patricia M Tilney --- Department of Botany and Plant Biotechnology, South Africa Gulmira Özek --- Department of Pharmacognosy, Faculty of Pharmacy, Turkey Suleyman Yur --- Medicinal Plant, Drug and Scientific Research Center, Turkey Temel Özek --- Department of Pharmacognosy, Faculty of Pharmacy, Turkey Kemal Hüsnü Can Başer --- Department of Pharmacognosy, Faculty of Pharmacy, Northern Cyprus Ben-Erik van Wyk --- Department of Botany and Plant Biotechnology, South AfricaPentzia incana is one of the most important of all natural pasture plants in the dry interior (Karoo) region of South Africa. This highly aromatic shrub is thought to be responsible for the distinctive flavour of Karoo lamb (a registered... -
Risk factors associated with nosocomial infections in the Neonatal Intensive Care Unit at Mahatma Gandhi Memorial hospital between 2014 and 2015
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Sharita Rameshwarnath --- Discipline of Public Health Medicine, School of Nursing and Public Health, South Africa Saloshni Naidoo --- Discipline of Public Health Medicine, School of Nursing and Public Health, South AfricaBackground: Nosocomial infections are one of the main causes of neonatal morbidity and mortality in low- and middle-income countries. The neonatal intensive care unit is a suitable environment for disseminating infections. The aim of this study was to identify risk... -
Carotenoid-based plumage pigmentation and concentration as a function of sex and habitat type in the Yellow-breasted Boubou Laniarius atroflavus
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: S Temidayo Osinubi --- School of Biological Sciences, New Zealand Kevin J McGraw --- School of Life Sciences, USA Ulf Ottosson --- AP Leventis Ornithological Research Institute, University of Jos, Nigeria Jennifer A Brown --- School of Mathematics and Statistics, New Zealand James V Briskie --- School of Biological Sciences, New Zealand Hazel M Chapman --- School of Biological Sciences, New ZealandThe study of avian integumentary colouration can offer insight into dietary and metabolic processes as well as fitness in focal species. Yet, we know relatively less about the system of feather colouration in African birds in comparison to Europe, North... -
Thromboelastography in mild, chronic liver disease: challenging conventional coagulation tests preceding liver biopsy
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: LR Veronese --- Department of Anaesthesia and Perioperative Medicine, South Africa M Miller --- Department of Anaesthesia and Perioperative Medicine, South Africa WC Spearman --- Division of Hepatology, Department of Medicine, South AfricaPatients presenting for liver biopsy may have a deficiency of the synthetic function of the liver. They commonly undergo testing of their INR, which is used to decide if there may be a bleeding risk and if that needs to... -
Triggers of phytoplankton bloom dynamics in permanently eutrophic waters of a South African estuary
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DA Lemley --- Botany Department and the Institute for Coastal and Marine Research, South Africa JB Adams --- Botany Department and the Institute for Coastal and Marine Research, South Africa NA Strydom --- Zoology Department, South AfricaThe permanently eutrophic Sundays Estuary experiences recurrent harmful algal blooms (HABs) of Heterosigma akashiwo (Raphidophyceae). This study aimed to identify the environmental variables shaping phytoplankton community composition and succession patterns during a typical spring/summer harmful algal bloom (HAB) period. Monitoring... -
Health and chemical burdens of fish species from polluted and hyper-eutrophic freshwater ecosystems in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GM Wagenaar --- Department of Zoology, South Africa IEJ Barnhoorn --- Department of Zoology, South AfricaThree aquatic ecosystems in South Africa, the Hartbeespoort, Klipvoor and Bospoort Dams, are classified as hyper-eutrophic, because of high nutrient loads and chemical pollution. Water and two fish species, Clarias gariepinus and Cyprinus carpio, were collected from these dams to... -
Biomarkers of toxicity in Clarias gariepinus exposed to sublethal concentrations of polycyclic aromatic hydrocarbons
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TO Sogbanmu --- Ecotoxicology and Conservation Unit, Department of Zoology, Faculty of Science, Nigeria AO Osibona --- Department of Marine Sciences, Faculty of Science, Nigeria OA Oguntunde --- Department of Anatomic and Molecular Pathology, Faculty of Basic Medical Sciences, Nigeria AA Otitoloju --- Ecotoxicology and Conservation Unit, Department of Zoology, Faculty of Science, NigeriaPhysiological, biochemical and histological indices in Clarias gariepinus broodstock, and teratogenic indices in embryos exposed to sublethal concentrations of naphthalene, phenanthrene and pyrene were investigated in 2014 using a static-renewal bioassay protocol. Phenanthrene (1.41 mg l−1) was the most toxic,... -
Preliminary evaluation of non-native rainbow trout (Oncorhynchus mykiss) impact on the Cederberg ghost frog (Heleophryne depressa) in South Africa’s Cape Fold Ecoregion
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Avidon --- Department of Conservation Ecology and Entomology, South Africa JM Shelton --- Department of Conservation Ecology and Entomology, South Africa SM Marr --- DST/NRF Research Chair in Inland Fisheries and Freshwater Ecology, South Africa TA Bellingan --- Centre for Invasion Biology, South Africa KJ Esler --- Department of Conservation Ecology and Entomology, South Africa OLF Weyl --- DST/NRF Research Chair in Inland Fisheries and Freshwater Ecology, South AfricaWe evaluated the impact of non-native rainbow trout Oncorhynchus mykiss on a population of endemic Cedarberg ghost frog Heleophryne depressa in the upper Krom River (Olifants-Doring River Catchment, Cape Fold Ecoregion). We compared H. depressa abundance (using kick-sampling and underwater... -
‘Telephone Triage’: a possible means of managing the after-hours patient load at primary health care facilities in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: AA Adeniji --- Division of Family Medicine and Primary Care, Stellenbosch University, Tygerberg, South Africa, LH Mabuza --- Department of Family Medicine and Primary Health Care, Sefako Makgatho Health Sciences University, Pretoria, South Africa.,The rate at which routine patients are using the emergency department (ED) as a path to enter into the healthcare system in South Africa’s community healthcare facilities and district hospitals is alarming. The increasing number of acutely presenting, less stable... -
Quality of primary care physicians’ communication of diabetes self-management during medical encounters with persons with diabetes mellitus in a resource-poor country
Item type: Journal Article • Journal: South African Family Practice • Authors: OS Ojo --- Family Medicine Department, Nigeria SO Malomo --- Family Medicine Department, Nigeria AO Egunjobi --- Family Medicine Department, Nigeria AOA Jimoh --- Family Medicine Department, Nigeria MO Olowere --- Family Medicine Department, NigeriaBackground: Most of the Nigerian studies on the determinants of diabetes self-management have focused on patient-related factors. There is no previous local study that examined the quality of diabetes self-management education provided by primary care physicians to people with diabetes... -
Environmental responses of jellyfish polyps as drivers of medusa populations off the coast of Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Ziegler --- Department of Biodiversity and Conservation Biology, South Africa MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaJellyfish populations in the southeastern Atlantic off the coast of Namibia have increased subsequent to the decline of small pelagic fisheries at the end of the 1960s, although the environment there has also become warmer and the waters off Walvis... -
Assessment of the likely sensitivity to climate change for the key marine species in the southern Benguela system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Ortega-Cisneros --- Department of Ichthyology and Fisheries Science, South Africa S Yokwana --- Department of Ichthyology and Fisheries Science, South Africa W Sauer --- Department of Ichthyology and Fisheries Science, South Africa K Cochrane --- Department of Ichthyology and Fisheries Science, South Africa A Cockcroft --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South Africa L Singh --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa M Smale --- Department of Zoology and Coastal and Marine Research, South Africa A Wood --- Gleneagles Environmental Consulting, South Africa G Pecl --- Institute for Marine and Antarctic Studies, AustraliaClimate change is altering many environmental parameters of coastal waters and open oceans, leading to substantial present-day and projected changes in the distribution, abundance and phenology of marine species. Attempts to assess how each species might respond to climate change... -
The relationship between objectively measured physical activity and parameters of disease control in an African population of type 2 diabetes mellitus
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: MA Siddiqui --- Department of Internal Medicine, South Africa S Bhana --- Endocrinology Department, South Africa R Daya --- Endocrinology Department, South AfricaBackground: The incidence of type 2 diabetes mellitus (T2DM) is increasing rapidly. This is possibly due to increasing obesity, reduced level of activity, sedentary lifestyle, ageing population and industrialisation. -
Post-traumatic stress disorder and health risk behaviour among persons 15 years and older in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- HIV/AIDS/STIs and TB (HAST), Human Sciences Research Council, South Africa Supa Pengpid --- Department of Research Innovation and Development, South AfricaThe aim of this study was to investigate the association between post-traumatic stress disorder (PTSD) and health risk behaviours among persons 15 years and older in South Africa. We analysed data from the South African National Health and Nutrition Examination... -
Ubuntu HeartMath programme efficacy for social coherence and work spirit: Preliminary evidence
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Stephen D. Edwards --- Psychology Department, South AfricaThis study reports preliminary evidence on the efficacy of an Ubuntu type HeartMath intervention for the purpose of facilitating social coherence and spirit at work. The study employed a pre-test and post-test, mixed methods design with 17 students and staff... -
Teacher-instigated in-school interpersonal violence: Types and prevalence in South African public schools
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Nontle Nako --- College of Education, Edgewood Campus, South Africa Nithi Muthukrishna --- College of Education, Edgewood Campus, South AfricaThe study examined types and prevalence of interpersonal violence in South African schools. Data on in-school interpersonal violence by the South African Council of Teachers (SACE) were analysed. The sample consisted of 1 184 teachers (rural = 32.6%, urban =... -
Mother–baby dyads enrolled in PMTCT care in western Kenya: characteristics and implications for ART programmes
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Edith A Ogalo --- Moi Teaching and Referral Hospital, Kenya Japheth O Adina --- Academic Model Providing Access to Health Care (AMPATH)-USAID, Kenya Hesbon Ooko --- Academic Model Providing Access to Health Care (AMPATH)-USAID, Kenya James Batuka --- US Agency for International Development (USAID), Kenya Sylvester Kimaiyo --- Academic Model Providing Access to Health Care (AMPATH)-USAID, KenyaThe objective of the study was to establish the mother–baby pair characteristics that contribute to vertical transmission of HIV and elucidate on remediation. We assessed for factors increasing the odds of HIV transmission in children born to HIV-infected mothers in... -
Prevalence of HIV and other infections and injection behaviours among people who inject drugs in Addis Ababa, Ethiopia
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Minilik Demissie --- Ethiopian Public Health Institute, Ethiopia Lisa G. Johnston --- United Nations Office on Drug and Crime, USA Mekonnen Muleta --- United Nations Office on Drug and Crime, USA Dires Desyebelew --- United Nations Office on Drug and Crime, USA Wudinesh Belete --- Ethiopian Public Health Institute, Ethiopia Atsbeha G/Egxiabehre --- Ethiopian Public Health Institute, Ethiopia Nigussie Gezahegn --- Ethiopian Public Health Institute, Ethiopia Desta Kassa --- Ethiopian Public Health Institute, Ethiopia Yibeltal Aseffa --- Ethiopian Public Health Institute, EthiopiaBackground: Ethiopia is one of the sub-Saharan African countries most affected by HIV/AIDS. However, the country lacks data describing the extent of the epidemic among people who inject drugs (PWID). Thus, a bio-behavioural study was conducted in 2015 to generate... -
In Search of Poem-Maps of the Swahili Seas: Three Sea Poems by Haji Gora Haji
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Yvonne Adhiambo Owuor --- Independent Scholar, KenyaTo what extent can a text borne in memory give texture, perspectives, meaning, dimensionality and sense to a place? Where is the locus of meaning in such a case? Can this locus be mapped? Questions about Swahili navigational poetry (poem-maps)... -
An analytical-numerical approach in the calculation of photovoltaic module parameters operating under partial shaded conditions
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Abdouramani Dadjé --- Department of Renewable Energy, National Advanced School of Engineering of Maroua, Cameroon Noël Djongyang --- Department of Renewable Energy, National Advanced School of Engineering of Maroua, Cameroon Réné Tchinda --- LISIE, Fotso Victor University Institute of Technology, CameroonThe aim of this work is to determine the parameters and characteristics of a PV module in case of partial shading conditions. Both numerical and analytical methods are used in order to attain this objective. The iterative method namely Newton-Raphson... -
Radial variation of wood properties in Neolamarckia cadamba trees from an East Java community forest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Yus Andhini Bhekti Pertiwi --- Faculty of Agriculture, Japan Haruna Aiso --- Faculty of Agriculture, Japan Futoshi Ishiguri --- Faculty of Agriculture, Japan Sri Nugroho Marsoem --- Faculty of Forestry, Indonesia Shinso Yokota --- Faculty of Agriculture, JapanRadial variations in wood properties, cell morphologies and cell proportions were investigated for nine 4-year-old Neolamarckia cadamba trees planted in a community forest in East Java, Indonesia. The relationships between stem diameter and wood properties, cell morphologies or cell proportions... -
Acute respiratory distress syndrome following a biphasic anaphylactic reaction to morphine: a case report and review of the literature
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: KU Tobi --- Department of Surgery and Anaesthesiology, University of Namibia, Namibia G Kirenga --- Department of Anaesthesiology, University of Rwanda, Rwanda S Muhmuza --- Department of Anaesthesiology, King Faisal Hospital, Rwanda P Ruhato --- Department of Anaesthesiology, University of Rwanda, RwandaBackground: Biphasic anaphylactic reaction is a variant of the usual and more commonly seen monophasic anaphylactic reaction. However, recently it has been observed that biphasic anaphylactic reaction may not be as uncommon as previously believed. Furthermore, serious and life-threatening complications... -
Molecular phylogenetics reveals a complex history underlying cryptic diversity in the Bush Squeaker Frog (Arthroleptis wahlbergii) in southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: KA Tolley --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South Africa W Conradie --- Port Elizabeth Museum, South Africa J Harvey --- Devonshire Avenue, South Africa J Measey --- Centre for Invasion Biology, Department of Botany and Zoology, South Africa DC Blackburn --- Florida Museum of Natural History, United StatesThroughout the Miocene, the African landscape underwent broad climatic shifts that profoundly influenced the distribution of fauna and flora. Since the late Miocene, these shifts have created a landscape in southern Africa that is strongly characterised by savanna and arid... -
Cold storage for low-cost air-conditioning
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel M. Madyira --- Department of Mechanical Engineering Science, South AfricaBuilding heating, ventilation and air-conditioning (HVAC) consumes 50% of the building energy consumption. Such high costs are based on the conventional HVAC cycles for air cooling based on grid connected buildings. However, there are alternative passive and active cold storage... -
Long-term changes in land use, land cover and vegetation in the Karoo drylands of South Africa: implications for degradation monitoring
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Timm Hoffman --- Department of Biological Sciences, South Africa Andrew Skowno --- South African National Biodiversity Institute, South Africa Wesley Bell --- Department of Biological Sciences, South Africa Samukele Mashele --- Department of Biological Sciences, South AfricaWe used several large data sets at a range of temporal and spatial scales to document the land-use/land-cover change (LULCC) dynamics of the semi-arid Succulent Karoo and Nama-Karoo biomes of South Africa. More than 95% of the Karoo is comprised... -
Response of two wheat cultivars to inoculation of diazotrophic bacteria in combination with reduced nitrogen fertilisation under field conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Reannah RN Otanga --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, South Africa Kwasi S Yobo --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, South Africa Mark D Laing --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, South AfricaChemical fertilisers are essential for plant nutrition in attaining desired yields. However, increased cost of fertiliser input has made it impossible for small-scale farmers to properly fertilise their crops for optimum yields. Five bacterial strains originally isolated from no-till agricultural... -
Intraspecific morphological divergence in two Cichlid species from Benin
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Luke M Bower --- Program in Ecology and Evolutionary Biology and Department of Wildlife and Fisheries Sciences, USA Laith A Jawad --- Freelance Fish Biodiversity Consultant, New Zealand Pierre M Gnohossou --- Département d’Aménagement et Gestion de Ressources Naturelles, Republic of Benin Ayoko Géraldine Tossou --- Département d’Aménagement et Gestion de Ressources Naturelles, Republic of BeninSelection on morphological traits can vary across the range of species, inducing a mosaic of phenotypes across populations. Intraspecific morphological divergence had been demonstrated for many fish groups inhabiting environments with varying abiotic or biotic selective pressures. Such intraspecific phenotypic... -
The first record of Wormian bones in lizards
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Lauren Rudie --- , , United States Patrick J. Lewis --- , , United StatesWormian bones are accessory bones found between cranial elements. These rare bones vary greatly in size, shape and placement. Wormian bones are well-known in mammals, notably in humans and chimpanzees, but not in lizards. Here we examine the genus Zygaspis,... -
Comparative skull osteology and preliminary systematic revision of the African lizard genus Heliobolus (Squamata: Lacertidae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mirjam Dubke --- , Germany Christy A. Hipsley --- , Germany Johannes Müller --- , GermanyThe anatomy of African lacertid lizards (Lacertidae: Eremiadini) is poorly known, which has hindered a better understanding of their evolutionary relationships. This applies especially to the East African clade, which includes the genera Nucras, Latastia, Philochortus, Pseuderemias and Heliobolus. We... -
Tuberculosis, staring, love and loneliness: Flavia’s story
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Pieter du Plessis --- Department of Social Anthropology, South Africa Siv Tshefu --- Department of Social Anthropology, South Africa Flavia Nazier --- Research participant, South AfricaThis photo essay emanates from research conducted in 2017 that focused on the life histories of transgender sex workers in Cape Town who have had tuberculosis (TB). The aim was to capture the experiences of the disease from an anthropological... -
“We are like bubblegum”: underground narratives of tuberculosis among South African miners
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Mutsawashe Mutendi --- Anthropology, School of African and Gender Studies, Anthropology and Linguistics, South Africa Helen Macdonald --- Anthropology, School of African and Gender Studies, Anthropology and Linguistics, South AfricaMiners working on South African mines suffer from the highest rate of tuberculosis (TB) in the world. The prevalence of tuberculosis among miners is four to seven times higher than for the general population of South Africa, a country with... -
Globalised tuberculosis control in local worlds
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Justin Dixon --- Department of Global Health and Development, United Kingdom Helen Macdonald --- School of African and Gender Studies, Anthropology and Linguistics, South AfricaDespite a steady global decline in the incidence of tuberculosis (TB), progress towards health targets has been slow and a crisis of drug-resistant strains of TB continues unabated. The United Nations high-level meeting on TB in September 2018 resulted in... -
Acquired physical disability: Personal meanings in a rural South African setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Marubini Christinah Sadiki --- Department of Psychology, South Africa Makondelele Radzilani-Makatu --- Department of Psychology, South Africa Marty Prudence Zikhali --- Department of Sociology, South AfricaThis study explored personal meanings attached to acquired physical disabilities in a rural South African community. Informants were seven adults with disability (females = 4; age range = 18 to 55 years). They responded to semi-structured face-to-face interviews on the meanings they attached to... -
Long-term physico-chemical and faunal changes in a small, rural South African estuary
Item type: Journal Article • Journal: African Zoology • Authors: M Kajee --- Department of Biological Sciences and Centre for Invasion Biology, South Africa CL Griffiths --- Department of Biological Sciences and Centre for Invasion Biology, South Africa SJ Lamberth --- Fisheries Management, Department of Agriculture, South AfricaThe Palmiet Estuary is a small, rural estuary in the Western Cape that only closes briefly during dry summers. The system was previously surveyed during 1979 to 1980 and we repeated the survey in April 2015 (mouth closed) and September... -
Environmental influence on phytoplankton communities in the northern Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Barlow --- , South Africa T Lamont --- , South Africa D Louw --- , Namibia M-J Gibberd --- , South Africa R Airs --- , United Kingdom A van der Plas --- , NamibiaAn investigation of surface phytoplankton communities was undertaken on the shelf of the northern Benguela upwelling ecosystem during austral autumn (May) and spring (September), along latitudinal transects at 20° S and 23° S, from 2 to 70 nautical miles offshore,... -
The occurrence of mycotoxigenic fungi in abalone feed in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MR Greeff-Laubscher --- , South Africa I Beukes --- , South Africa GJ Marais --- , South Africa K Jacobs --- , South AfricaAbalone feed in South Africa is mainly produced from locally sourced grains and has soy or fishmeal as a protein source. Contamination with fungal species associated with grain-based animal feed is, therefore, a predictable risk. Various Fusarium, Penicillium and Aspergillus... -
Dominance hierarchies within different size groupings of Nile tilapia (Oreochromis niloticus) and effects on growth and physiological responses
Item type: Journal Article • Journal: African Zoology • Authors: Kwasi Adu Obirikorang --- , Ghana Anthea Georgina Ama Ofori --- , Ghana Benjamin Apraku Gyampoh --- , GhanaHierarchies are prevalent in social animals and display of aggression by dominant individuals often results in appetite and growth suppressions in lower-ranked fish. This study investigated the effects of dominance hierarchies on growth and some physiological responses in Nile tilapia... -
Efforts Toward Improving Maize Yields on Smallholder Farms in Uasin Gishu County, Kenya, through Site-specific, Soil-testing-based Fertiliser Recommendations: A Transdisciplinary Approach
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: Arusey Chebet --- University of Eldoret, Kenya Njoroge Ruth --- University of Eldoret, Kenya Otinga A. Nekesa --- University of Eldoret, Kenya Wilson Ng’etich --- University of Eldoret, Kenya Koech Julius --- University of Eldoret, Kenya Roland W. Scholz --- Danube University, AustriaThis study evaluated the effects of site-specific, soil-testing-based fertiliser recommendations on maize yields using the transdisciplinary (TD) process. The TD process utilizes knowledge from science and practice. Farmers, extension officers, local financial institutions, and other practitioners collaborated with local scientists... -
Cropping System Intensification as a Management Method Against Vectors of Viruses Causing Maize Lethal Necrosis Disease in Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: E. S. Namikoye --- Department of Agricultural Science and Technology, G. M. Kariuki --- Department of Agricultural Science and Technology, Z. M. Kinyua --- Kenya Agricultural and Livestock Research Organization, M. W. Githendu --- Department of Agricultural Science and Technology, M. Kasina --- Kenya Agricultural and Livestock Research Organization,Maize Lethal Necrosis Disease (MLND) has emerged as a great threat to maize production in East Africa. It is caused by a synergistic infection of maize by sugarcane mosaic virus (SCMV) and maize chlorotic mottle virus (MCMV). This study was... -
Comparison of physiological responses to high temperatures in juvenile and adult Cape Rockjumpers Chaetops frenatus
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Krista N Oswald --- Department of Zoology, South Africa Alan TK Lee --- Fitzpatrick Institute of African Ornithology, DST/NRF Centre of Excellence, South Africa Ben Smit --- Department of Zoology, South AfricaConcerns about climate change have led to an increase in studies on physiological mechanisms birds possess to cope with increasing temperatures. For range-restricted species such as Cape Rockjumpers Chaetops frenatus, whose population declines are correlated with habitat warming, we identified... -
Quantification of sorgoleone in sorghum accessions from eight southern African countries
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Handsen Tibugari --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Cornelius Chiduza --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Arnold B Mashingaidze --- Department of Crop Science and Post-Harvest Technology, School of Agricultural Sciences and Technology, Zimbabwe Stanford Mabasa --- Department of Crop Science, Faculty of Agriculture, ZimbabweAllelopathic effects of sorghum (Sorghum bicolor (L.) Moench) can ease weed pressure and improve grain yields if cultivars capable of producing high levels of natural chemicals effective in suppressing weeds of economic importance are identified. Three hundred and fifty three... -
An EnSpm interspersed repeat identified in Triticum aestivum and implicated in resistance to Diuraphis noxia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Anandi Bierman --- Division of Bioinformatics, South Africa Anna-Maria Botha --- Department of Genetics, South AfricaDiuraphis noxia Kurdjumov, 1913 (Hemiptera: Aphididae), commonly known as the Russian wheat aphid, is a devastating pest of wheat and barley. Although fourteen sources of resistance (Dn genes) have been identified to date, none have been cloned. In this study... -
An artificial inoculation protocol for Uromycladium acaciae, cause of a serious disease of Acacia mearnsii in southern Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Stuart Fraser --- Department of Plant and Soil Sciences, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, South Africa Alistair R McTaggart --- Department of Plant and Soil Sciences, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, South Africa Julian Moreno Chan --- Institute for Commercial Forestry Research, South Africa Thobile Nxumalo --- Institute for Commercial Forestry Research, South Africa Louise S Shuey --- Department of Genetics, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, South Africa Michael J Wingfield --- Department of Plant and Soil Sciences, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, South Africa Jolanda Roux --- Department of Plant and Soil Sciences, Tree Protection Co-operative Programme, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, South AfricaUromycladium acaciae is the cause of a severe wattle rust epidemic in plantations of Acacia mearnsii (black wattle) in southern Africa. Research on the biology of this damaging rust is assisting in the development of control strategies. One strategy under... -
Lesion size induced by Chrysoporthe fungal pathogens varies between Eucalyptus species and geographic locations in Zambia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Donald Chungu --- Department of Plant and Environmental Sciences, School of Natural Resources, Zambia Jedrick Siyingwa --- Department of Plant and Environmental Sciences, School of Natural Resources, Zambia Phillimon Ng’andwe --- Department of Biomaterial Science and Technology, School of Natural Resources, Zambia Bertha Chitala Chungu --- School of Business, ZambiaChrysoporthe canker disease is one of the serious threats facing planted Eucalyptus in southern Africa. In order to manage this disease, planting of less susceptible species of Eucalyptus has been promoted in many countries but it is not clear which... -
Dietary analysis across breeding seasons of Eleonora's Falcon Falco eleonorae on the western coast of Algeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Sihem Bakour --- Laboratoire de Zoologie Appliquée et d’Écophysiologie Animale, Algeria Riadh Moulaï --- Laboratoire de Zoologie Appliquée et d’Écophysiologie Animale, AlgeriaThe study of the contents of 318 Eleonora's Falcon Falco eleonorae pellets, collected from three islands off the western coast of Algeria, allowed us to identify 134 prey items. These are divided into 55 families, 21 orders and five classes... -
Montane forest birds in winter: do they regularly move to lower altitudes? Observations from the Eastern Cape, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Adrian JFK Craig --- Department of Zoology and Entomology, South Africa Patrick E Hulley --- Department of Zoology and Entomology, South AfricaSeasonal altitudinal migration to lower altitudes including the coast has been ascribed to a number of forest birds, of which 14 species occur at Fort Fordyce Reserve in the Eastern Cape, South Africa. Based on our observations and ringing at... -
Language as potential space for relational positioning: Exploring language use as a manifestation of leadership anxiety dynamics
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Aden-Paul Flotman --- Department of Industrial and Organisational Psychology, South Africa Michelle S. May --- Department of Industrial and Organisational Psychology, South Africa Frans Cilliers --- Department of Industrial and Organisational Psychology, South AfricaThis exploratory study considered language use as a manifestation of anxiety in work and everyday settings. Respondents were seven psychology practitioners from across the discipline (following a psychodynamic approach), who reflected on the dynamics of language use associated with their... -
Alcohol use among adults in Kenya: Results from the National Non-Communicable Diseases Risk Factor survey, 2015
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- ASEAN Institute for Health Development, Thailand Karl Peltzer --- Department of Research and Innovation, South AfricaThe aim of this study was to assess the prevalence and correlates of alcohol use among Kenyan adults. We analysed data from the Kenya cross-sectional national Non-Communicable Diseases Risk Factor survey, 2015. The survey sampled 4 469 adults (median age... -
A comparative analysis of the morphology and nutritive value of five South African native grass species grown under controlled conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Khuliso E Ravhuhali --- Department of Animal Science, School of Agricultural Sciences, Faculty of Natural and Agricultural Sciences, South Africa Victor Mlambo --- School of Agricultural Sciences, Faculty of Agriculture and Natural Sciences, South Africa Tefera S Beyene --- Department of Livestock and Pasture Science, South Africa Lobina G Palamuleni --- Department of Geography and Remote Sensing, School of Environmental and Health Sciences, Faculty of Agriculture, South AfricaThe comparative growth habits and nutritive value of native grass species of South Africa are largely unknown despite the utility of this information in rangeland restoration efforts. This article presents a comparative characterisation of the morphology, chemical composition and in... -
Assessing legumes indigenous to South Africa, Lesotho and Swaziland for their pasture potential
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Marike Trytsman --- Agricultural Research Council–Animal Production, South Africa Elizabeth L Masemola --- Agricultural Research Council–Animal Production, South Africa Francuois L Müller --- Agricultural Research Council–Animal Production, South Africa Frikkie J Calitz --- Agricultural Research Council–Central Office (Biometry Services), South Africa Abraham E van Wyk --- Department of Plant and Soil Sciences, South AfricaIn contrast to the exploration and use of southern African grass plant genetic resources over the past century, only a few indigenous legume species are currently used as forages, notwithstanding the vast untapped legume diversity available in southern Africa. The... -
Rickets mimicker: a report of two cases of primary hyperparathyroidism in adolescence
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Imran M Paruk --- Department of Diabetes and Endocrinology, South Africa Fraser J Pirie --- Department of Diabetes and Endocrinology, South Africa Ayesha A Motala --- Department of Diabetes and Endocrinology, South AfricaThe presentation of primary hyperparathyroidism (PHPT) in most Western countries has evolved from the classic description of ‘stones, bones, and groans’ to becoming increasingly asymptomatic as a result of more frequent serum calcium screening. However, many developing countries are still... -
Factors associated with adherence to ARV treatment in people living with HIV/AIDS in a rural area (Koula-Moutou) in East Gabon
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Arnaud Mongo-Delis --- HIV/AIDS Outpatient Treatment Centre of Koula-Moutou, Gabon Landry E Mombo --- Laboratory of Molecular and Cellular Biology, Gabon Patrick Mickala --- Laboratory of Molecular and Cellular Biology, Gabon Wenceslas Bouassa --- HIV/AIDS Outpatient Treatment Centre of Koula-Moutou, Gabon Wilfried S Bouedy --- HIV/AIDS Outpatient Treatment Centre of Koula-Moutou, Gabon Bertrand M’batchi --- Laboratory of Molecular and Cellular Biology, Gabon Cyrille Bisseye --- Laboratory of Molecular and Cellular Biology, GabonThe goal of this study was to evaluate the impact of socio-clinical factors on adherence to antiretroviral treatment in people living with HIV/AIDS in Koula-Moutou (a rural area of Gabon). Two adherence assessment methods based on patient declaration and compliance... -
The feasibility of the draw-and-write technique in exploring the resilience of children orphaned by AIDS
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Nyika Machenjedze --- Save the Children South Africa, South Africa Macalane J Malindi --- School of Psychosocial Education, South Africa Fungai Mbengo --- School of Nursing and Midwifery,Worldwide, researchers routinely study children indirectly through adults who act as proxies for such children. The call for researchers to rather study children directly and adopt less intrusive child-friendly methodologies has become louder. The draw-and-write technique is regarded as a... -
Variance components and heritability of yield and yield-related traits in tepary bean (Phaseolus acutifolius)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Zinhle B Mhlaba --- African Centre for Crop Improvement, South Africa Hussein A Shimelis --- African Centre for Crop Improvement, South Africa Beyene Amelework --- African Centre for Crop Improvement, South Africa Albert T Modi --- School of Agricultural, Earth and Environmental Sciences, Discipline of Crop Science, South Africa Jacob Mashilo --- African Centre for Crop Improvement, South AfricaThe extent of variance and heritability of traits influence the response to selection in crop breeding programs. The objective of this study was to determine variance components and heritability in tepary bean (Phaseolus acutifolius A.Gray) populations to identify promising genotypes... -
Quantifying the impact of foliar insects on two Eucalyptus hybrids in Zululand, northern KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lindokuhle S Dlamini --- School of Natural Resource Management, South Africa Keith M Little --- School of Natural Resource Management, South Africa Benice Sivparsad --- Institute for Commercial Forestry Research, South Africa Ryan Nadel --- School of Forestry and Wildlife Sciences, USAThe effects of defoliation by insect pests on Eucalyptus growth in South Africa is poorly understood, with the need for negative impacts to be quantified. In 2010, two long-term insect exclusion trials were established at Palm Ridge and Teza plantations... -
Nutrient status of sandy soils in smallholder areas of Zimbabwe and the need to develop site-specific fertiliser recommendations for sustainable crop intensification
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Gabriel Soropa --- Department of Environmental Sciences and Technology, Zimbabwe Justice Nyamangara --- Department of Environmental Sciences and Technology, Zimbabwe Ermson Z Nyakatawa --- Department of Crop Science and Post Harvest Technology, ZimbabweSustainable crop intensification in sub-Saharan Africa cannot be achieved if farmers cultivate inherently infertile soils that are deficient in key essential nutrients, such as nitrogen and phosphorus. Most smallholder farmers in sub-Saharan Africa are resource-constrained and apply suboptimal fertiliser amounts,... -
Can non-momentum factor premiums explain the momentum anomaly on the JSE? An in-depth portfolio attribution analysis
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Daniel Page --- Finance Division, School of Economic & Business Sciences, South Africa Christo Auret --- Finance Division, School of Economic & Business Sciences, South AfricaSouth African literature related to the momentum anomaly is generally limited to the exploration of momentum on a univariate and at most a bivariate basis, such as in combination with value (Fraser & Page, 2000) or liquidity (Page, Britten, &... -
Re-imagining Dzaleka: The Tumaini Festival and Refugee Visibility
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Catherine Makhumula --- Department of Drama, South AfricaIn this article, I explore the Tumaini Festival at Dzaleka Refugee Camp in Malawi as an important site for the re-imagination of place and the refugee. I argue that through the institution of the festival, refugee artists challenge the perception... -
Bathymetry, substrate and fishing areas of Southeast Atlantic high-seas seamounts
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: OA Bergstad --- Institute of Marine Research (IMR), Norway ÅS Høines --- Institute of Marine Research (IMR), Norway R Sarralde --- Instituto Espanol de Oceanografia, Centro Oceanografico de Canarias, Spain G Campanis --- South East Atlantic Fisheries Organisation (SEAFO), Namibia M Gil --- Departamento de Ecología y Biología Animal, Edificio de Ciencias Experimentales, Spain F Ramil --- Departamento de Ecología y Biología Animal, Edificio de Ciencias Experimentales, Spain E Maletzky --- Ministry of Fisheries and Marine Resources, Namibia E Mostarda --- Food and Agriculture Organization of the United Nations (FAO), Italy L Singh --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa MA António --- Secretary of State of Affairs, Ministry of Agriculture, Rural Development and Fisheries, AngolaMost of the Southeast Atlantic Ocean is abyssal, and global bathymetries suggest that only ∼3.2% of the areas beyond national jurisdiction (ABNJ; also known as the high seas, as defined in the United Nations Convention on the Law of the... -
Abundance estimates of an isolated population of common bottlenose dolphins Tursiops truncatus in Walvis Bay, Namibia, 2008–2012
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SH Elwen --- Mammal Research Institute, University of Pretoria, South Africa RH Leeney --- Natural History Museum, United Kingdoms T Gridley --- Centre for Statistics in Ecology, Environment and Conservation, Department of Statistical Sciences,The coastal population of common bottlenose dolphins Tursiops truncatus found in Namibia is regionally isolated and unique. This population faces several potential anthropogenic threats, especially in Walvis Bay, including boat-based tourism, a commercial harbour undergoing expansion, and aquaculture for oysters... -
Spatial considerations when monitoring reef fishes
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Parker --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa H Winker --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa ATF Bernard --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa MKS Smith --- South African National Parks, Rondevlei Scientific Services, South Africa A Götz --- South African Environmental Observation Network (SAEON), South AfricaSpatial dependence can obscure relationships between response and explanatory variables because of structuring within the residuals reducing variance and biasing coefficient estimates. Here, we highlight the influence of the spatial component, in the presence of spatial dependence, on abundance trends... -
Protected nearshore shallow and deep subtidal rocky reef communities differ in their trophic diversity but not their nutritional condition
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ER Heyns-Veale --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa NB Richoux --- Department of Zoology and Entomology, South Africa ATF Bernard --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa A Götz --- Elwandle Node, South African Environmental Observation Network (SAEON), South AfricaLarge physical changes that alter reef macrobenthos and fish assemblages occur with increasing depth, so the biological processes that regulate communities at different depths are expected to diverge. We used analyses of stable isotopes (δ13C and δ15N) and fatty acids... -
“This phone saved my life”: Older persons’ experiences and appraisals of an mHealth intervention aimed at addressing loneliness
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Mary Ann Jarvis --- School of Nursing and Public Health, College of Health Science, South Africa Jennifer Chipps --- School of Nursing, Faculty of Community and Health, South Africa Anita Padmanabhanunni --- Department of Psychology, South AfricaThis qualitative study aimed to explore older persons’ experiences and appraisals of the utility of an mHealth intervention for reducing their sense of loneliness. Participants (n = 13; 86.42% females; age range 65 to 87 years) received training in the... -
Gendered adversity and mental health of adolescents orphaned by AIDS in a rural South African community: An exploratory study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Mokoena P. Maepa --- Clinical Psychology Department, South Africa Oluyinka Ojedokun --- Department of Pure & Applied Psychology, Nigeria Erhabor S. Idemudia --- School of Postgraduate Studies, South Africa Palesa Morubane --- Clinical Psychology Department, Vryburg Hospital, South AfricaThis study explored gender differences in adversity and mental health among South African adolescents orphaned by AIDS. Adolescents (N = 121; females = 45.5%; mean age 14.14 years, SD = 2.09) self-reported their childhood adversities and probable mental ill health... -
Morphological differentiation among populations of Sarotherodon melanotheron melanotheron Rüppell 1852 across the West African Lagoon systems (Benin, Cameroon, Nigeria, Togo)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MO Popoola --- Department of Zoology, Nigeria FDB Schedel --- SNSB-Bavarian State Collection Zoology, Germany MA Akintoye --- Department of Zoology, NigeriaMorphometric variation among populations of Sarotherodon melanotheron melanotheron across its natural range (Mahin, epe, Lekki, Apese, Kuramo, Lagos, Iyagbe, Ologe, Badagry, Yewa – Nigeria; Be Lagoon – Togo; Idenau – Cameroon, Aheme – Benin; Portonovo – Benin) were studied to... -
Growth and biomass partitioning of nine provenances of Quillaja saponaria seedlings to water stress
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos Magni --- Departamento de Silvicultura, Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Chile Sergio Espinoza --- Centro de Desarrollo para el Secano Interior, Facultad de Ciencias Agrarias y Forestales, Chile Paola Poch --- Departamento de Silvicultura, Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Chile Betsabé Abarca --- Departamento de Silvicultura, Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Chile Iván Grez --- Departamento de Silvicultura, Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Chile Eduardo Martínez --- Departamento de Silvicultura, Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Chile Marco Yáñez --- Núcleo Científico Multidisciplinario, Chile Rómulo Santelices --- Centro de Desarrollo para el Secano Interior, Facultad de Ciencias Agrarias y Forestales, Chile Antonio Cabrera --- Centro de Desarrollo para el Secano Interior, Facultad de Ciencias Agrarias y Forestales, ChileInformation on the morphological and physiological responses of seedlings to stressors, such as water stress, is required for successful early establishment of seedlings. We examined provenance variation in morphological and physiological traits of Quillaja saponaria Molina seeds from nine provenances... -
Effects of pruning on the concentration of secondary metabolites in Colophospermum mopane leaves
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rudzani A Makhado --- Department of Biodiversity, South Africa Martin J Potgieter --- Department of Biodiversity, South Africa Wilmien J Luus-Powell --- Department of Biodiversity, South AfricaColophospermum mopane, commonly known as mopane, produces secondary metabolites during the growing season. However, there is still insufficient knowledge on the quantity of secondary metabolites and the effect of browsers on the concentration of secondary metabolites. A pruning experiment was... -
Architecture-by-migrants: the porous infrastructures of Bellville
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Huda Tayob --- The Bartlett School of Architecture, United KingdomThis paper takes as its subject a series of contingent mixed-use urban markets that have been established in Cape Town, South Africa, by migrants, refugees and asylum seekers from various parts of the African continent. It argues that migrant spaces... -
Layering mobilities: charting place-making through performance in Johannesburg’s inner-city suburbia
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Alex Halligey --- South African Research Chair in Spatial Analysis and City Planning, Wits School of Architecture and Planning, South AfricaDrawing together Tim Cresswell’s work on mobilities with Walter Benjamin’s Arcades Project, this article considers the Johannesburg suburbs of Bertrams, Lorentzville and Judith’s Paarl as produced and reinvented through the mobilities of their inhabitants. How might an artistic performance foreground... -
Rhythm and connection on Rissik Street: Reflecting on public space research in inner-city Johannesburg
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Temba John Dawson Middelmann --- Town and Regional Planning, South AfricaThis paper explores how entangled layers of use and contingencies of open spaces in downtown Johannesburg, South Africa, relate to their structural, material and symbolic aspects. Reflecting on research at Pieter Roos Park, Constitution Hill and Gandhi Square, this paper... -
Double vision and suspended conversations: reconstituting landscapes of memory in Port Elizabeth, South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Naomi Roux --- Department of Architecture and Planning, South AfricaBetween 1968 and 1975, the neighbourhood of South End in Port Elizabeth underwent a traumatic process of destruction as its residents were forcibly removed under the Group Areas Act and the suburb was razed. This paper traces some of the... -
Morphological and molecular characterization of Glossidium pedatum Looss, 1899 and Orientocreadium batrachoides Tubangui, 1931 from sharptooth catfish, Clarias gariepinus (Burchell, 1822)
Item type: Journal Article • Journal: African Zoology • Authors: José Chissiua Dumbo --- Department of Zoology, South Africa Quinton Marco Dos Santos --- Department of Zoology, South Africa Annemariè Avenant-Oldewage --- Department of Zoology, South AfricaThe superfamily Plagiorchioidea has a considerable number of genera and species with great uncertainty of their phylogenetic position. The objectives of the current study were to specifically describe the morphology and determine for the first time the phylogenetic position of... -
Diffuse large B-cell lymphoma of the endometrium: an unusual site for primary presentation
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Reubina Wadee --- Anatomical Pathology, Republic of South AfricaDiffuse large B-cell lymphomas are fairly common adult haematolymphoid malignancies. Approximately 40% of such tumours may present in an extranodal site. These lymphomas are, however, infrequently identified in the female genital tract and even more rarely, identified in the endometrium... -
The accuracy of preoperative serum CA-125 levels to predict lymph node metastasis in a population of South African women with endometrial carcinoma
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: K Hapsari --- Department of Obstetrics and Gynaecology, Faculty of Health Sciences, School of Medicine, South Africa J Makin --- Department of Obstetrics and Gynaecology, Faculty of Health Sciences, School of Medicine, South Africa G Dreyer --- Department of Obstetrics and Gynaecology, Faculty of Health Sciences, School of Medicine, South AfricaBackground: The purpose of the study was to evaluate the predictive value of serum CA-125 levels in the preoperative assessment of endometrial carcinoma in a setting where late presentation is common. -
Relationships between commonly-used South African and international soil phosphorus extraction tests on pristine and cultivated soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: VG White --- , South Africa AG Hardie --- , South Africa PJ Raath --- , South AfricaThe availability of soil phosphorus (P) norms for various plant available P tests is limited due to the cost of establishing these norms. Consequently a need exists for a means of converting between the values of commonly used South-African and... -
What is anthropology that decolonising scholarship should be mindful of it?
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Hylton White --- Department of Anthropology, South AfricaDecolonising scholarship in South African anthropology has met with an ingrained scepticism about ethnographic valorisations of forms of life that claim to be indigenous. This scepticism comes from a very long history of opposing ethnological essentialisms created in the colonial... -
Reliving secrecy and ethics in bojale ten years on
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Keletso Gaone Setlhabi --- Archaeology Unit, Department of History, BotswanaIn this photo essay, I reflect on secrecy and ethics in bojale [girls’ initiation] of Bakgatla-baga-Kgafela a decade after my participant observation in 2009. I had entered the ritual with the dual identity of initiate and researcher-at-home. The images were... -
Determination of Factors Influencing Cultivation and Utilisation of Pumpkins Among Smallholders in Kakamega and Nyeri Counties, Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: J.K. Kiramana --- Chuka University, Kenya D.K. Isutsa --- Egerton University, KenyaPumpkin is becoming an important fruit-vegetable, although its potential remains unexploited in Kenya. This study aimed at enhancing conservation, preservation and production of naturalized pumpkins through the cataloguing of accessions and documentation of indigenous traditional knowledge influencing cultivation and utilization... -
Diaphragm wall and piles set record in Africa: Foundation for Africa’s largest suspension bridge in Mozambique
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Joern Seitz --- GAUFF GmbH & Co. Engineering KG, Mozambique/Germany Bai Pengyu --- CRBC China Road and Bridge Corporation, China Wang Gang --- CRBC China Road and Bridge Corporation, ChinaAs part of the master plan for the infrastructure of the road network in the southern Africa area, a suspension bridge is being built in Maputo, Mozambique. The bridge over the Maputo Bay has an open span of 680 m between... -
A qualitative approach to assess innovation in small infant industries within developing countries: The case of pharmaceuticals in Tunisia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nejla Yacoub --- Faculty of Economics and Management of Mahdia, Monastir, TunisiaEmpirical methodologies to assess innovation are generally econometric models using ‘quantifiable’ variables. However, the innovation system approach shows that innovation is a social process. Its analysis needs to consider the influence of humans on the innovation system actors’ behaviours and... -
What can multi-sited and digital ethnography contribute to innovation studies in the global South?
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Marcela Suarez --- Lateinamerika-Institut, GermanyInnovation studies research is at the forefront of recent theoretical and interdisciplinary debates. However, it also faces at least three methodological challenges, namely: the need for empirical strategies to analyze inclusive innovations, the need to conduct symmetrical cutting-edge research in... -
Beyond the ‘usual suspects’ – Alternative qualitative methods for innovation policy studies
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nadja Nordling --- Faculty of Social Sciences, Finland Rhiannon Pugh --- Department of Human Geography, SwedenIn this paper we make three points about the current state and promising future directions of qualitative research in our field of innovation policy research. First, we argue that research design and methods are dealt with quite superficially in most... -
Genetic diversity of endangered sandalwood (Osyris lanceolata) populations in Kenya using ISSR molecular markers
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: KP Andiego --- Department of Forestry and Wood Science, Kenya OG Dangasuk --- Department of Biological Sciences, Kenya DW Odee --- Biotechnology Laboratory, Kenya FS Omondi --- Biotechnology Laboratory, Kenya DF Otieno --- Department of Biological Sciences, Kenya BK Balozi --- Department of Forestry and Wood Science, KenyaOsyris lanceolata is an evergreen, drought tolerant tropical African tree species belonging to the family Santalaceae. It is endangered, owing to overexploitation for its essential oil used in cosmetics and pharmaceutical industries. The study aimed at determining: (1) the genetic... -
Effect of residue management and fertiliser application on the productivity of a Eucalyptus hybrid and Acacia mangium planted on sloping terrain in northern Vietnam
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Nguyen Van Bich --- Tasmanian Institute of Agriculture, University of Tasmania, Australia Daniel Mendham --- CSIRO Land and Water, Australia Katherine J Evans --- Tasmanian Institute of Agriculture, University of Tasmania, Australia Tran Lam Dong --- Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Vietnam Vo Dai Hai --- Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Vietnam Hoang Van Thanh --- Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Vietnam Caroline L Mohammed --- Tasmanian Institute of Agriculture, University of Tasmania, AustraliaForest plantation growers in Vietnam commonly burn residues after harvesting and often apply suboptimal amounts of nutrients during plantation establishment. We examined whether the retention of forest residue, and application of phosphorus fertiliser at higher rates, can increase rates of... -
Diatoms associated with two South African kelp species: Ecklonia maxima and Laminaria pallida
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NAS Mayombo --- Department of Biodiversity and Conservation Biology, South Africa R Majewska --- Unit for Environmental Sciences and Management, School of Biological Sciences, South Africa AJ Smit --- Department of Biodiversity and Conservation Biology, South AfricaKelp forests are believed to host a large biomass of epiphytic fauna and flora, including diatoms, which constitute the base of aquatic food webs and play an important role in the transfer of energy to higher trophic levels. Epiphytic diatom... -
Discrimination of the phenotypic sardine Sardina pilchardus stocks off the Moroccan Atlantic coast using a morphometric analysis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Mounir --- Biodiversity and Dynamics of Ecosystems Laboratory, Department of Biology, Faculty of Sciences, Morocco A Ewague --- Biodiversity and Dynamics of Ecosystems Laboratory, Department of Biology, Faculty of Sciences, Morocco M Znari --- Biodiversity and Dynamics of Ecosystems Laboratory, Department of Biology, Faculty of Sciences, Morocco H Elmghazli --- Biodiversity and Dynamics of Ecosystems Laboratory, Department of Biology, Faculty of Sciences, MoroccoMorphometric variation can be very useful for discriminating ‘phenotypic stocks’ as groups with similar life-history traits. Such groups are of great importance for accurate population-dynamics modelling for purposes of fishery stock assessment and management, independent of their genetic differences or... -
Seasonal cycle of the salinity barrier layer revealed in the northeastern Gulf of Guinea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AN Dossa --- International Chair in Mathematical Physics and Applications (ICPMA-UNESCO Chair), Benin CY Da-Allada --- International Chair in Mathematical Physics and Applications (ICPMA-UNESCO Chair), Benin G Herbert --- Institut de Recherche pour le Développement (IRD), Instrumentation, Moyens Analytiques, France B Bourlès --- Institut de Recherche pour le Développement (IRD), Instrumentation, Moyens Analytiques, FranceThe region located in the far northeast of the Gulf of Guinea (NEGG), eastern tropical Atlantic, remains poorly documented due to a lack of available in situ ocean data. Heavy rainfall and intense river discharges observed in this region induce... -
Reef fish and benthic community structures of the Santa Luzia Marine Reserve in the Cabo Verde islands, eastern central Atlantic Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Freitas --- Faculdade de Engenharia e Ciências do Mar, República de Cabo Verde TC Mendes --- Departamento de Ecologia, Brazil C Almeida --- Faculdade de Engenharia e Ciências do Mar, República de Cabo Verde T Melo --- Biosfera I – Associação para Defesa do Meio Ambiente, República de Cabo Verde RC Villaça --- Departamento de Biologia Marinha, Brazil R Noguchi --- Programa de Engenharia Ambiental, Brazil SR Floeter --- Laboratório de Biogeografia e Macroecologia Marinha, Departamento de Ecologia e Zoologia, Brazil CA Rangel --- Centro Nacional de Avaliação da Biodiversidade e de Pesquisa e Conservação do Cerrado (CBC), Brazil CEL Ferreira --- Departamento de Biologia Marinha, BrazilUnderstanding ecological structures and the dynamics of reef fish assemblages is a fundamental step in current conservation biology. Patterns of abundance and biomass of reef fish communities of the tropical Cabo Verde Archipelago (eastern central Atlantic Ocean) have not been... -
Dynamics of water exchange and salt flux in the Macuse Estuary, central Mozambique, southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LLAJ Miguel --- Post-Graduate Program in Geology (PPGl), Brazil JWA Castro --- Post-Graduate Program in Geology (PPGl), Brazil SFA Machava --- Department of Oceanography, MozambiqueStudies of water-particle flow dynamics in shallow estuarine systems show that tidal currents control water exchange, salt flux and residence time. We used the 3D Estuary, Lake and Coastal Ocean Model (ELCOM) to estimate the dynamics of tidal currents, salt... -
Spatial distribution, seasonal abundance and exploitation status of shark species in Kenyan coastal waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BK Kiilu --- Kenya Fisheries Services, Kenya B Kaunda-Arara --- Department of Fisheries and Aquatic Sciences, Kenya RM Oddenyo --- Coral Reef Conservation Project, Kenya P Thoya --- Kenya Marine and Fisheries Research Institute, Kenya JM Njiru --- Kenya Marine and Fisheries Research Institute, KenyaEfforts to conserve and manage shark populations are often hampered by a lack of basic data, such as species-specific landings and distribution ranges. We bridge this gap in coastal East Africa by providing data on the distributions, catch rates, morphometrics,... -
Review of anthropogenic threats and biodiversity assessment of an Ethiopian soda lake, Lake Abijata
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Wagaw --- Department of Biology, Ethiopia S Mengistou --- Department of Zoological Sciences, Ethiopia A Getahun --- Department of Zoological Sciences, EthiopiaThe intention of this review is to assess the impact of anthropogenic activities on the biodiversity of Lake Abijata. The lake was established as a National Park, together with Lakes Shalla and Chitu, to conserve water birds. It has high... -
Sex-specific grazing dynamics of the recently described copepod, Lovenula raynerae, in an ephemeral pond in the Eastern Cape province of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW Froneman --- Department of Zoology and Entomology, South AfricaThis study investigated the temporal changes in the sex specific ingestion rates of the recently described calanoid copepod, Lovenula raynerae, which numerically and by biomass dominates the plankton community in ephemeral ponds in the Eastern Cape province of South Africa... -
Incidence and Severity of Common Bean (Phaseolus vulgaris L.) Pests in Agro-Ecological Zones and Farming Systems of Western Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: JO Ogecha --- Kenya Agricultural and Livestock Research Organization, Kenya W Arinaitwe --- International Centre for Tropical Agriculture, Kampala Uganda JW Muthomi --- Department of Crop Protection, Kenya V Aritua --- International Centre for Tropical Agriculture, Kampala Uganda JN Obanyi --- Kenya Agricultural and Livestock Research Organization, KenyaInfestation by insect pests is a serious problem in legume up scaling activities and a threat to future production in Kenya. The survey aimed at determining incidence and severity of insect pests of common beans in different districts and agro-ecological... -
The Role of Gender and Other Socioeconomic Factors in the Adoption of the Contagious Bovine Pleuropneumonia Vaccine: A Literature Review
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: Elizabeth Waithanji --- Independent gender consultant, Salome Wanjira Kairu-Wanyoike --- Deputy Director Veterinary Services, Department of Livestock, Kenya Millicent Liani --- Centre for Capacity Research, United KingdomThis paper looks at the role of gender and other socioeconomic factors in the adoption of the contagious bovine pleuropneumonia (CBPP) vaccine in response to three research questions: What gender and socioeconomic factors affect the adoption of the CBPP vaccine?... -
Geographic variation in West African Agama picticauda: insights from genetics, morphology and ecology
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Sneha Krishnan --- , USA 80526, 4257858934 Caleb Ofori-Boateng --- , , Ghana Matthew K Fujita --- , , USA Adam D Leaché --- , USAWest Africa is a region characterised by high species diversity and endemism, making it an ideal region to study the evolution of genetic and phenotypic differentiation. Species in this region often vary in morphology and genetics; however, the specific drivers... -
Correlates of physical activity among adults with anxiety symptoms in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- ASEAN Institute for Health Development, Thailand Karl Peltzer --- Deputy Vice Chancellor Research and Innovation Office, South AfricaThe present study aimed to assess the correlates of low physical activity in adults with anxiety in South Africa. Data from the South African National Health and Nutrition Examination Survey (a cross-sectional survey in 2012) were utilised. The sample included... -
Factors associated with clinical outcomes among neonates admitted with acute bilirubin and hypoxic-ischaemic encephalopathies at a tertiary hospital in south-west Nigeria
Item type: Journal Article • Journal: South African Family Practice • Authors: Olusoga Babatunde Ogunfowora --- Department of Paediatrics, Nigeria Tinuade Adetutu Ogunlesi --- Department of Paediatrics, Nigeria Victor Ayodeji Ayeni --- Department of Paediatrics, NigeriaBackground: Babies who are delivered outside hospital are most at risk of serious illnesses such as perinatal asphyxia and severe hyperbilirubinaemia. These conditions are major contributors to neonatal mortalities in resource-poor settings. -
Phenotypical, physiological and biochemical traits of the vegetative growth of wild tepary bean (Phaseolus acutifolius) under restricted water conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Reynaldo Leal-Delgado --- Botánica, Colegio de Postgraduados, México Cecilia B Peña-Valdivia --- Botánica, Colegio de Postgraduados, México Rodolfo García-Nava --- Botánica, Colegio de Postgraduados, México Antonio García-Esteva --- Botánica, Colegio de Postgraduados, México Eleazar Martínez-Barajas --- Departamento de Bioquímica, Facultad de Química, México Daniel Padilla-Chacón --- CONACyT – Colegio de Postgraduados, MéxicoTepary bean (Phaseolus acutifolius A. Gray) is distributed in arid and semi-arid regions from Arizona to the northern areas of Mexico. The objective of this study was to quantify the effects of water deficit on vegetative growth in four accessions... -
Effect of degree and duration of water saturation on iron, manganese and exchangeable cations in wetland soils of Maputaland, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Brenton Mabuza --- Soil, Crop and Climate Sciences, South Africa Cornelius W van Huyssteen --- Soil, Crop and Climate Sciences, South AfricaSoils of the Maputaland Coastal Plain are naturally grey, do not contain any redoximorphic features, and are therefore problematic to interpret during wetland delineation. This study was consequently initiated to determine if these soils were able to reduce in a... -
A five-year audit of lower limb amputations below the knee and rehabilitation outcomes: the Durban experience
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: P Manickum --- School of Clinical Medicine, College of Health Sciences, South Africa SS Ramklass --- School of Clinical Medicine, College of Health Sciences, South Africa TE Madiba --- Department of General Surgery, School of Clinical Medicine, College of Health Sciences, South AfricaIntroduction: Lower limb amputation (LLA) due to diabetes mellitus (DM) is a growing epidemic worldwide. -
Cranial variation in common dolphins Delphinus spp. off South Africa, with the inclusion of information from the holotype of Delphinus capensis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SG Ngqulana --- Department of Zoology, South Africa S Plön --- Earth Stewardship Science Research Institute – Africa Earth Observatory Network, South Africa A Galatius --- Department of Bioscience, Denmark P Pistorius --- Department of Zoology, South Africa GJG Hofmeyr --- Department of Zoology, South AfricaThe common dolphins (genus Delphinus) are widely distributed in all temperate and tropical oceans. Over this wide geographical distribution they show considerable range in morphological variation, which has led to descriptions of several species in the genus. Until recently, only... -
Evidence for multiple paternity and confirmation of an Indo-Pacific origin of blacktip shark Carcharhinus limbatus occurring in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AE Bester-van der Merwe --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa SN Maduna --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa KL Hull --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa J Bell --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa C Rossouw --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa SP Wintner --- KwaZulu-Natal Sharks Board, South AfricaThe blacktip shark Carcharhinus limbatus is a cosmopolitan species found in warm-temperate, subtropical and tropical waters around the world. The research here aimed to assess whether multiple paternity exists in South African C. limbatus and to confirm phylogeographic patterns previously... -
Localised intermittent upwelling intensity has increased along South Africa’s south coast due to El Niño–Southern Oscillation phase state
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MI Duncan --- Department of Ichthyology and Fisheries Science, South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa AE Bates --- Department of Ocean Sciences, Canada WS Goschen --- Institute for Coastal and Marine Research, Ocean Sciences Campus, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe El Niño–Southern Oscillation (ENSO) phase state is reported to drive interannual variability in sea temperatures along South Africa’s south coast through its influence on wind-induced upwelling processes. Whether ENSO drives the intensity of localised, abrupt, intermittent upwelling is less... -
Comparative trophic ecology of Cape anchovy Engraulis encrasicolus and Natal anchovy Stolephorus holodon off South Africa’s east coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Horton --- Department of Biological Sciences, South Africa CD van der Lingen --- Department of Biological Sciences, South AfricaThe distributional ranges of Cape anchovy Engraulis encrasicolus and Natal anchovy Stolephorus holodon presently overlap at their eastern and western extremes, respectively, off South Africa’s east coast. These species might become more strongly sympatric as a consequence of changed distributions... -
Intertidal foraging by Tristan Thrushes
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Peter G Ryan --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Ben J Dilley --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaWe report that some 10% of Tristan Thrushes Turdus eremita on the coast at Inaccessible Island feed extensively on marine invertebrates (mainly crustaceans), despite lacking functional salt glands. Such birds regularly drink from freshwater springs that are common along the... -
Taxonomy, phylogeny and biogeography of African spurfowls Galliformes, Phasianidae, Phasianinae, Coturnicini: Pternistis spp.
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tshifhiwa G Mandiwana-Neudani --- Department of Biodiversity, South Africa Robin M Little --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, Department of Biological Sciences, South Africa Timothy M Crowe --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, Department of Biological Sciences, South Africa Rauri CK Bowie --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, Department of Biological Sciences, South AfricaAfro-Asiatic perdicine galliform birds, commonly and inconsistently referred to as francolins, spurfowls and partridges, have contentious taxonomic and phylogenetic histories. In a widely followed monograph, Hall combined two putative monophyletic, but taxonomically unnamed, clades comprising 28 perdicine species known as... -
Natal dispersal in the Southern Ground Hornbill Bucorvus leadbeateri
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kate F Carstens --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Reshma Kassanjee --- Department of Statistical Sciences, South Africa Robin M Little --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Peter G Ryan --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Philip AR Hockey --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaDispersal is of ecological and evolutionary importance for population biology because it affects a species’ ability to expand its range, to colonise new favourable habitats and to increase the likelihood of population persistence. Male birds are mostly philopatric, delaying dispersal... -
Age classes of developing Red-necked Spurfowl Pternistis afer based on plumage, morphology and behaviour
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Johann H van Niekerk --- Department of Environmental Sciences, College of Agriculture and Environmental Sciences, South AfricaThis paper describes the plumage and morphology development of 11 age classes of Red-necked Spurfowl Pternistis afer to assist with field observations. Sixteen spurfowl were marked with coloured leg rings in the Cannon Rocks Holiday Resort, Eastern Cape, South Africa... -
Unravelling the taxonomy and distribution of two problematic small mammal genera in the Karoo biome
Item type: Journal Article • Journal: African Zoology • Authors: Devon Main --- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, South Africa Laura Tensen --- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, South Africa Katharina Gihring --- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, South Africa Gary Bronner --- Department of Biological Sciences, South Africa Nadine Aboul-Hassan --- Institute for Communities and Wildlife in Africa, Department of Biological Sciences, South Africa Michelle Blanckenberg --- Institute for Communities and Wildlife in Africa, Department of Biological Sciences, South Africa Bettine Jansen van Vuuren --- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, South AfricaSouth Africa harbours remarkable biological diversity with three of the 34 recognised global biodiversity hotspots placed within its borders. One of these is the Succulent Karoo, which together with the Nama-Karoo, forms the Greater Karoo region. Notwithstanding a paucity of... -
Taxonomy, phylogeny and biogeography of ‘true’ francolins: Galliformes, Phasianidae, Phasianinae, Gallini; Francolinus, Ortygornis, Afrocolinus gen. nov., Peliperdix and Scleroptila spp.
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tshifhiwa G Mandiwana-Neudani --- Department of Biodiversity, South Africa Robin M Little --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, Department of Biological Sciences, South Africa Timothy M Crowe --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, Department of Biological Sciences, South Africa Rauri CK Bowie --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, Department of Biological Sciences, South AfricaAfro-Asiatic perdicine galliform taxa commonly and inconsistently referred to as francolins, spurfowls and partridges have contentious taxonomic and phylogenetic histories. Hall combined two putative monophyletic, but taxonomically unnamed, clades comprising 28 perdicine species known as ‘francolins’ or fisante in South... -
Variable phylogeographic histories of five forest birds with populations in Upper and Lower Guinea: implications for taxonomy and evolutionary conservation
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jean-Bernard Dongmo --- Laboratory of Zoology, Department of Animal Biology and Physiology, Faculty of Sciences, Cameroon Jeffrey M DaCosta --- Biology Department, Boston College, USA Champlain Djieto-Lordon --- Laboratory of Zoology, Department of Animal Biology and Physiology, Faculty of Sciences, Cameroon Pierre Ngassam --- Laboratory of Parasitology and Ecology, Cameroon Michael D Sorenson --- Department of Biology, USAThis study evaluates phylogeographic structure in selected forest bird species distributed on either side of the Dahomey Gap in West Africa to extend analyses of avian diversification across the Guineo-Congolean forest. Mitochondrial DNA sequence data were collected for five species,... -
Clarifying taxonomic, distributional and genetic information relating to subspecies of the Hildebrandt’s Spurfowl Pternistis hildebrandti and the Yellow-necked Spurfowl P. leucoscepus
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Timothy M Crowe --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, Department of Biological Sciences, South Africa Robin M Little --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, Department of Biological Sciences, South Africa Donald A Turner --- Bird Committee of Nature Kenya, KenyaWe provide suggested errata vis-à-vis Mandiwana-Neudani TG, Little RM, Crowe TM, Bowie RCK. 2019. Taxonomy, phylogeny and biogeography of African spurfowls Galliformes, Phasianidae, Phasianinae, Coturnicini: Pternistis spp. Ostrich 90(2): 145–172. Firstly, the name fischeri was incorrectly applied to the southern... -
The potential impact of dietary supplement adulteration on patient assessment and treatment from a healthcare provider’s perspective
Item type: Journal Article • Journal: South African Family Practice • Authors: Gary Gabriels --- Department of Pharmacy and Pharmacology, Faculty of Health Sciences, South Africa Mohamed Irhuma --- Department of Pharmacy and Pharmacology, Faculty of Health Sciences, South AfricaDietary supplements have been manufactured and supplied to the market with the objective of enhancing the overall health of the general population and optimising the performance of athletes. The perceived intention of dietary supplementation is to increase the nutritional content... -
Factors associated with physical activity amongst patients with hypertension in two community health centres in uMgungundlovu health district, KwaZulu-Natal, 2018
Item type: Journal Article • Journal: South African Family Practice • Authors: SW Mbambo --- School of Nursing and Public Health, South Africa B Tlou --- School of Nursing and Public Health, Discipline of Public Health Medicine, South Africa TP Dlungwane --- School of Nursing and Public Health, Discipline of Public Health Medicine, South AfricaBackground: Hypertension (HPT) is a global public health challenge. It predisposes to cardiovascular diseases, kidney diseases and disability as well as contributing to high death rates. HPT is increasing tremendously in sub-Saharan Africa with HPT-related mortality risk having increased by... -
A profile of Caesarean sections performed at a district hospital in Tshwane, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: I Govender --- Department of Family Medicine and Primary Health Care, South Africa C Steyn --- Department of Family Medicine and Primary Health Care, South Africa O Maphasha --- Department of Family Medicine, University of Pretoria, South Africa AT Abdulrazak --- Department of Family Medicine and Primary Health Care, South AfricaIntroduction: Caesarean section (CS) is a common obstetric procedure that prevents neonatal and maternal death when performed correctly if indicated; however, CS can give rise to complications that lead to maternal and perinatal morbidity and mortality. Rates of CS are... -
The quality of feedback from outpatient departments at referral hospitals to the primary care providers in the Western Cape: a descriptive survey
Item type: Journal Article • Journal: South African Family Practice • Authors: Robert Mash --- Division of Family Medicine and Primary Care, South Africa Herma Steyn --- Department of Health, South Africa Muideen Bello --- Division of Family Medicine and Primary Care, South Africa Klaus von Pressentin --- Division of Family Medicine and Primary Care, South Africa Liezel Rossouw --- Department of Health, South Africa Gavin Hendricks --- Division of Family Medicine and Primary Care, South Africa Germarie Fouche --- Department of Health, South Africa Dusica Stapar --- Division of Family Medicine and Primary Care, South AfricaBackground: Coordinating care for patients is a key characteristic of effective primary care. Family physicians in the Western Cape formed a research network to enable them to perform practical research on key questions from clinical practice. The initial question selected... -
Antimicrobial stewardship in rural districts of South Africa: growing a positive culture
Item type: Journal Article • Journal: South African Family Practice • Authors: Klaus B von Pressentin --- Mossel Bay Sub-district, Garden Route District, South Africa Hendré Swanepoel --- Van Rensburg Lancet, South Africa Jessica JS Opie --- Division of Haematology, National Health Laboratory Service, South Africa Louis S Jenkins --- Division of Family Medicine and Primary Care, South AfricaBackground: The success of medical specialist-led antimicrobial stewardship activities in urban tertiary health care settings has been well documented. The issue of antimicrobial resistance remains an ongoing concern. This has particular relevance in primary health care communities treated from sub-district... -
Structure and diversity of the Araucaria forest in southern Brazil: biotic homogenisation hinders the recognition of floristic assemblages related to altitude
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Lucia Sevegnani --- Departamento de Ciências Naturais, Brazil André L de Gasper --- Departamento de Ciências Naturais, Brazil Arthur V Rodrigues --- Programa de Pós-Graduação em Engenharia Florestal, Brazil Débora V Lingner --- Departamento de Engenharia Florestal, Brazil Leila Meyer --- Programa de Pós-graduação em Ecologia e Evolução, Brazil Alexandre Uhlmann --- Embrapa Florestas, Brazil Laio Z Oliveira --- Departamento de Engenharia Florestal, Brazil Alexander C Vibrans --- Programa de Pós-Graduação em Engenharia Florestal, BrazilForest structure and species abundance may respond to environmental features triggered by geomorphology, altitude gradients and human impacts. In this study we investigated if data from a large-area inventory would support the segregation of floristic assemblages related to altitude-oriented forest... -
The use of nitrogen fertilisation for suppressing Mycosphaerella in Eucalyptus dunnii
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Alexandre Techy de Almeida Garrett --- UNICENTRO, Brazil Luciano Rodrigo Lanssanova --- UNICENTRO, Brazil Mariane Bueno de Camargo --- Klabin SA, Brazil Andrea Nogueira Dias --- Department of Forest Engineering, Brazil Flávio Augusto de Oliveira Garcia --- Department of Forest Engineering, BrazilMycosphaerella leaf disease (MLD) is a pathogen of eucalypt plantations causing leaf spots and defoliation, and affecting growth. In this study, two different dosages of nitrogen fertilisation together with a control treatment currently used for two clones being affected by... -
Gestational trophoblastic disease managed at Grey's Tertiary Hospital: a five-year descriptive study
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Bongumusa S Makhathini --- Grey’s Hospital, Department of Obstetrics and Gynaecology, Faculty of Health Sciences, South Africa Greta Dreyer --- Gynaecologic Oncology Unit, Department of Obstetrics and Gynaecology, South Africa Eckhart J Buchmann --- Department of Obstetrics and Gynaecology, South AfricaBackground: A study was undertaken to describe the outcomes of gestational trophoblastic disease (GTD) and to determine the influence of antecedent pregnancy, the distance travelled by patients to Grey's Hospital (GH), and HIV status on the disease and clinical outcomes. -
Centring ordinary people: grounded approaches to land reform in Southern Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Maano Ramutsindela --- Environmental and Geographical Science, South Africa Andrew Hartnack --- Independent researcher and evaluation specialist, South AfricaThis introduction to the timely special issue of Anthropology Southern Africa examines land reform in the region, offering ethnographic perspectives on a subject often dominated by economists, lawyers and journalists. It points to the need for grounded approaches that go... -
Care, contagion and the good mother: narratives of motherhood, tuberculosis and healing
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Ziyanda Majombozi --- School of African and Gender Studies, Anthropology and Linguistics, South AfricaSouth Africa is reported as one of the countries with a high burden of tuberculosis (TB). In response to the epidemic, the country’s national Department of Health attempted to improve access to health care and TB treatment with a variety... -
Football and forlorn hope: an ethnographic comic concerning the Grahamstown Soccer Association from 1975 to 1985
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Shawn Forde --- School of Kinesiology, CanadaThis ethnographic comic presents research that was conducted in Makhanda (previously Grahamstown) in the Eastern Cape of South Africa. The comic only tells a partial story, based on ethnographic and historical research, relating to soccer, nostalgia, hope and violence. It... -
Seasonal and successional patterns of phytoplankton in Epe Lagoon, Lagos, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OA Kunrunmi --- Department of Botany, Nigeria TA Adesalu --- Department of Botany, NigeriaVariations in phytoplankton species abundance and composition are regulated by changes in physico-chemical factors. A study of biodiversity and successional sequences was carried out monthly from November 2012 to April 2014 to determine the environmental factors controlling phytoplankton assemblages in... -
Mapping distribution of water hyacinth (Eichhornia crassipes) in Rwanda using multispectral remote sensing imagery
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JA Mukarugwiro --- School of Animal, Plant and Environmental Sciences (APES), South Africa SW Newete --- School of Animal, Plant and Environmental Sciences (APES), South Africa E Adam --- School of Geography, Archaeology and Environmental Studies (GAES), South Africa F Nsanganwimana --- African Center of Excellence for Innovative Teaching & Learning Mathematics & Science, Rwanda KA Abutaleb --- Institute for Soil, Climate and Water, South Africa MJ Byrne --- School of Animal, Plant and Environmental Sciences (APES), South AfricaWater hyacinth, Eichhornia crassipes (C. Mart) Solms (Pontederiaceae), is an invasive aquatic macrophyte with major negative economic and ecological impacts in Rwanda and other East African countries since its establishment in the region in the 1960s. Reliable estimates of water... -
A tale of records from Hakskeen Pan, the first record of Pumilibranchipus deserti Hamer and Brendonck, 1995 (Anostraca, Branchiopoda) from South Africa and the pursuit of a new world land speed record
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: E Meyer-Milne --- South African Environmental Observation Network, South Africa MC Mlambo --- Department of Freshwater Invertebrates, Albany Museum, South AfricaUntil now, Pumilibranchipus deserti was known from only one locality in Namibia. This paper reports the first record of this species from South Africa in Hakskeen Pan, Northern Cape, which represents a new, easterly range extension of the known distribution... -
Occurrence of selected pharmaceuticals in industrial wastewater, receiving waters and fish
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SM Lan --- Ecotoxicology Unit, Department of Zoology, Nigeria NH Amaeze --- Ecotoxicology Unit, Department of Zoology, Nigeria HE Obanya --- Ecotoxicology Unit, Department of Zoology, Nigeria CU Okoroafor --- Ecotoxicology Unit, Department of Zoology, NigeriaData on pharmaceutical contamination of African waterbodies are scarce. Therefore, this research aimed to quantify the occurrence of selected pharmaceuticals in wastewater from pharmaceutical industries, receiving waters and fish. Water and fish samples were collected from waterbodies close to two... -
Mc1r genotype and plumage colouration in highly polymorphic jackal buzzards, Buteo rufofuscus
Item type: Journal Article • Journal: African Zoology • Authors: Sophia Bam --- School of Life Sciences, South Africa Lorinda Hart --- School of Life Sciences, South Africa Sandi Willows-Munro --- School of Life Sciences, South AfricaEvolution is driven by natural selection acting on variable phenotypic traits. Understanding the molecular basis of those traits is crucial for elucidating the mechanisms of natural selection. The southern African jackal buzzard (Buteo rufofuscus) displays extreme plumage colour polymorphism, with... -
Psychotria microphylla induces oxidative stress and biochemical alterations in giant African land snail Achatina achatina (Linnaeus, 1758)
Item type: Journal Article • Journal: African Zoology • Authors: CI Atama --- Department of Zoology and Environmental Biology, Nigeria CF Anajemba --- Department of Zoology and Environmental Biology, Nigeria ION Aguzie --- Department of Zoology and Environmental Biology, Nigeria JC Madu --- Department of Zoology and Environmental Biology, Nigeria NI Ossai --- Department of Zoology and Environmental Biology, Nigeria CD Nwani --- Department of Zoology and Environmental Biology, NigeriaPsychotria microphylla is an ichthyotoxic botanical used to stupefy fish prior to harvesting in aquatic systems. The current study investigated the effect of P. microphylla leaf extract on the oxidative stress and biochemical parameters of the giant African land snail,... -
A snapshot assessment of the diet of Cape fur seals Arctocephalus pusillus pusillus at Ilha dos Tigres, Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Winkler --- Department of Ichthyology and Fisheries Science, South Africa S Mannheim --- Department of Ichthyology and Fisheries Science, South Africa A-R Childs --- Department of Ichthyology and Fisheries Science, South Africa C Santos --- Biologia Faculdade de Ciências, Angola C de Beer --- Department of Ichthyology and Fisheries Science, South Africa MJ Smale --- Department of Zoology and Institute for Coastal and Marine Research, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe population of Cape fur seal Arctocephalus pusillus pusillus at Ilha dos Tigres off the coast of southern Angola is expanding. Until now the only available biological information on the population has been its demographic parameters, and this insufficiency has... -
A tale of two habitats: preliminary comparison of fish abundance and diversity between saltmarsh- and mangrove-dominated creeks in the Nahoon Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Keur --- Department of Biodiversity and Conservation Biology, Faculty of Natural Science, South Africa N James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa A Rajkaran --- Department of Biodiversity and Conservation Biology, Faculty of Natural Science, South AfricaA preliminary assessment of abundance and richness of fishes utilising saltmarsh and mangrove habitats in the Nahoon Estuary, situated on the eastern coast of South Africa, was undertaken during July 2017. The structural composition and complexity of the two habitats... -
Life history, distribution and seasonal movements of a threatened South African endemic seabream, Chrysoblephus gibbiceps
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CG Attwood --- Department of Biological Sciences and the Marine Research Institute, South Africa ME Dawson --- Department of Biological Sciences and the Marine Research Institute, South Africa SE Kerwath --- Department of Biological Sciences and the Marine Research Institute, South Africa C Wilke --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South AfricaThe red stumpnose Chrysoblephus gibbiceps (Sparidae) is a South African endemic seabream that has been severely depleted by fishing. A total of 678 C. gibbiceps were sampled by line and trawl fishing for a study of their morphology, age, growth,... -
Oxygen and temperature influence the distribution of deepwater Cape hake Merluccius paradoxus in the southern Benguela: a GAM analysis of a 10-year time-series
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: FL Mbatha --- Department of Biological Sciences and Marine Research Institute, South Africa D Yemane --- Department of Biological Sciences and Marine Research Institute, South Africa M Ostrowski --- Institute of Marine Research (IMR), Norway CL Moloney --- Department of Biological Sciences and Marine Research Institute, South Africa MR Lipiński --- Department of Ichthyology and Fisheries Science, South AfricaGeneralised additive models (GAMs) were applied to survey data to assess the influence of dissolved oxygen, water temperature and year of sampling upon the presence/absence of small (≤15 cm TL), medium (16–34 cm TL) and large (≥35 cm TL) size... -
Nutritional values and chemical composition of tropical pastures as potential sources of α-tocopherol and condensed tannin
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jalise F Tontini --- Graduate Program in Animal Science, Agronomy College, Brazil Cesar HEC Poli --- Graduate Program in Animal Science, Agronomy College, Brazil Viviane S Hampel --- Graduate Program in Animal Science, Agronomy College, Brazil Alessandro P Minho --- Embrapa Southeast Livestock, Brazilian Agricultural Research Corporation, Ministry of Agriculture, Brazil James P Muir --- Texas AgriLife Research, USATropical pastures can be important natural sources of antioxidant compounds and may impact production and quality of animal protein with repercussions on human health. The objective of this study was to evaluate the concentrations of α-tocopherol, condensed tannin (CT) and... -
Interactive effect of planting date and fertiliser application on maize growth and yield under dryland conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Dolapo B Akinnuoye-Adelabu --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South Africa Tafadzwanashe Mabhaudhi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South Africa Albert T Modi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaUnderstanding the relationships among management practices during planting period will help producers to improve crop production under climate change. The interaction of planting date and soil fertility on maize yield was evaluated. Field trials were conducted during summer in 2014/15... -
Hydropedological grouping of South African soil forms
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johan J van Tol --- Department of Soil, Crop and Climate Sciences, South Africa Pieter AL Le Roux --- Institute for Groundwater Studies, University of the Free State, South AfricaThe science of hydropedology has progressed significantly in the past two decades, especially with regards to the interpretation of soil morphology and relating these interpretations to the hydrological behaviour of horizons, profiles, hillslopes and catchments. Soil classification is pivotal to... -
Phytochemical profiling and soluble sugars of African ginger (Siphonochilus aethiopicus) from different growing regions in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Salmina N Mokgehle --- Horticultural Science, School of Agricultural, Earth and Environmental Sciences, South Africa Samson Z Tesfay --- Horticultural Science, School of Agricultural, Earth and Environmental Sciences, South Africa Manaka J Makgato --- Agricultural Research Council–Vegetable and Ornamental Plants, South Africa Hintsa T Araya --- Agricultural Research Council–Vegetable and Ornamental Plants, South AfricaAfrican ginger (Siphonochilus aethiopicus) is distributed in different regions of South Africa and contains bioactive constituents that provide health benefits. However, there is limited information describing the phytochemical and soluble sugars in different parts of the plant from different regions... -
Improving productivity of orange-fleshed sweetpotato (Ipomoea batatas) through intercropping with legumes and moderate phosphorus application
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Eliah Munda --- International Potato Center, Mozambique Petrus J Pieterse --- Department of Agronomy, South Africa Maria I Andrade --- International Potato Center, Mozambique Godwill S Makunde --- International Potato Center, Mozambique Engil I Pereira --- School of Earth, Environmental, and Marine Sciences, USASweetpotato yield is adversely affected by poor soil fertility in Mozambique where access to inorganic fertilisers is lacking. The objective of the study was to evaluate the effectiveness of intercropping sweetpotato with groundnut and soybean at various phosphorus (P) fertilisation... -
Diversity analysis of mungbean (Vigna radiata) germplasm using a semi-graphical technique
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Hafiz Basheer Ahmad --- Oilseed Research Institute, Ayub Agricultural Research Institute, Pakistan Salsabeel Rauf --- Oilseed Research Institute, Ayub Agricultural Research Institute, Pakistan Waqas Shafqat Chattha --- Department of Plant Breeding and Genetics, Pakistan Busharat Hussain --- Pulses Research Institute, Ayub Agricultural Research Institute, Pakistan Iqtidar Hussain --- Department of Agronomy, Pakistan Irfan Rasool --- Pulses Research Institute, Ayub Agricultural Research Institute, PakistanGrain legumes such as mungbean are often co-cultivated with cereals. The genetic diversity among 84 mungbean genotypes was studied using metroglyph and principal component analysis. Data were recorded for days to flowering and maturity, plant height, pods per plant, clusters... -
Optimising the dosage of ethyl methanesulphonate mutagenesis in selected wheat genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Boluwatife M Olaolorun --- School of Agricultural, Earth and Environmental Sciences, South Africa Hussein A Shimelis --- School of Agricultural, Earth and Environmental Sciences, South Africa Isack Mathew --- School of Agricultural, Earth and Environmental Sciences, South Africa Mark D Laing --- School of Agricultural, Earth and Environmental Sciences, South AfricaNarrow genetic variation limits the success of crop improvement programs. Mutagenesis using ethyl methane- sulphonate (EMS) provides an opportunity to increase genetic variation to enhance selection in wheat improvement. This study aimed at establishing the optimum dosage and treatment conditions... -
Case study of effect of glyphosate application on plant-parasitic nematodes associated with a soybean–maize rotation system in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Akhona Mbatyoti --- Unit for Environmental Sciences and Management, Integrated Pest Management, South Africa Mieke S Daneel --- Agricultural Research Council–Tropical and Subtropical Crops, South Africa Antoinette Swart --- Agricultural Research Council–Plant Health and Protection, South Africa Mariette Marais --- Agricultural Research Council–Plant Health and Protection, South Africa Dirk De Waele --- Unit for Environmental Sciences and Management, Integrated Pest Management, South Africa Hendrika Fourie --- Unit for Environmental Sciences and Management, Integrated Pest Management, South AfricaInformation on the effect of the herbicide glyphosate on nematodes in the field is limited and contradictory. A small field experiment was conducted during two consecutive summer-growing seasons to investigate the response of plant-parasitic nematode communities on the application of... -
Seed oil content and fatty acid composition response to ethyl methanesulphonate mutagenesis in vernonia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sandile Hadebe --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Albert T Modi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South Africa Arno Hugo --- Department of Microbial, Biochemical and Food Biotechnology, South Africa Hussein A Shimelis --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaVernonia [Centrapalus pauciflorus (Willd.) H.Rob.] is a novel industrial oilseed crop that can be used to produce vernolic acid, a naturally epoxidised fatty acid. The study objective was to determine whether ethyl methylsulphonate (EMS) mutagenesis significantly altered seed oil content... -
Ecology, conservation, and phylogenetic position of the Madagascar Jacana Actophilornis albinucha
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Josephine D’Urban Jackson --- Milner Centre for Evolution, Department of Biology and Biochemistry, United Kingdom Sama Zefania --- Institut d’Enseignement Supérieur de Menabe, Madagascar Sebastien Moehy --- Institut d’Enseignement Supérieur de Menabe, Madagascar Andrew J Bamford --- Wildfowl and Wetlands Trust, United Kingdom Michael W Bruford --- Organisms and Environment Division, School of Biosciences, United Kingdom Tamás Székely --- Milner Centre for Evolution, Department of Biology and Biochemistry, United KingdomThe Madagascar Jacana Actophilornis albinucha (Jacanidae) is an endemic shorebird found in the threatened wetlands of western Madagascar. This species is presumed to exhibit classical polyandry; however, few data are available to support that assumption. More generally, a lack of... -
Identification of land predators of African Penguins Spheniscus demersus through post-mortem examination
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ralph ET Vanstreels --- Marine Apex Predator Research Unit, Institute for Coastal and Marine Research, South Africa Nola J Parsons --- Southern African Foundation for the Conservation of Coastal Birds, South Africa Cuan McGeorge --- Stony Point Nature Reserve, South Africa Renata Hurtado --- Southern African Foundation for the Conservation of Coastal Birds, South Africa Katrin Ludynia --- Southern African Foundation for the Conservation of Coastal Birds, South Africa Lauren Waller --- Southern African Foundation for the Conservation of Coastal Birds, South Africa Monique Ruthenberg --- Hottentots Holland Nature Reserve, South Africa Arne Purves --- Environmental Management Department, Transport and Urban Development Authority, South Africa Lorien Pichegru --- Marine Apex Predator Research Unit, Institute for Coastal and Marine Research, South Africa Pierre A Pistorius --- Marine Apex Predator Research Unit, Institute for Coastal and Marine Research, South AfricaThe African Penguin Spheniscus demersus is an endangered seabird endemic to southern Africa, and killing sprees by terrestrial predators have been one of the main threats for its mainland colonies. The methods employed to manage predators may differ depending on... -
Phytochemical screening and antimicrobial investigation of Moringa oleifera leaf extracts
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Oluwole Solomon Oladeji --- Department of Physical Sciences, Faculty of Pure and Applied Sciences, PMB 1001, Km 4, Ipetu Road, Omu-Aran, Kwara State, Nigeria Kehinde Abraham Odelade --- Department of Microbiology, Faculty of Natural and Agricultural Sciences, Private Bag X2046, Mmabatho 2735, South Africa Julius Kola Oloke --- Department of Pure and Applied Biology, PMB 4000, Ogbomoso, Oyo State, NigeriaPhytochemical screening and antimicrobial analysis of Moringa oleifera leaf collected from Ogbomoso, Nigeria were carried out. The secondary metabolites in M. oleifera leaf were extracted by maceration using chloroform, ethyl acetate and ethanol. Some important bioactive compounds or metabolites in... -
Are type 2 diabetic patients meeting targets? A Helen Joseph Hospital Diabetic Clinic Audit
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: S Bulbulia --- Division of Diabetes, Endocrinology and Metabolism, Helen Joseph Hospital, F Variava --- Physician, Netcare Pinehaven Hospital, South Africa Z Bayat --- Division of Diabetes, Endocrinology and Metabolism and Department of Internal Medicine, Helen Joseph Hospital,Background: The risk of complications from type 2 diabetes mellitus (T2DM) is high. Achieving targets reduces the morbidity and mortality. This study aims to assess whether patients at the Helen Joseph Hospital's Diabetic Clinic are meeting the 2012 SEMDSA targets... -
Evaluation of the accuracy of visual glucose estimates by healthcare providers and patients at Kalafong Hospital, City of Tshwane, South Africa
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Simbarashe B Mhishi --- Department of Epidemiology, University of Pretoria, South Africa Danie G van Zyl --- Clinical Department, Department of Internal Medicine, South AfricaBackground: A patient-centred approach with self-monitoring of blood glucose (SMBG) has emerged as the preferred approach in monitoring and managing blood glucose. The success of SMBG in diabetes treatment and management relies heavily on the accurate and reproducible measurement of... -
Breeding behaviour and diet of the Crowned Eagle Stephanoaetus coronatus in western Tanzania
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Hiroshi Kaneda --- Kaneda Wildlife Research, Ishikawa Nonoichi Sanno, JapanThe aim of the current study was to reveal the breeding ecology of Crowned Eagles in western Tanzania through constant daytime monitoring. The breeding circumstances of three resident pairs in the focal study area suggest that the breeding cycle of... -
Breeding ecology of the Cream-coloured Courser in Cape Verde
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Romy Rice --- Department of Evolutionary Zoology and Human Biology, Hungary José O Valdebenito --- Milner Centre for Evolution, United Kingdom Meinolf Ottensmann --- Department of Animal Behaviour, Germany Noémie Engel --- Department of Evolutionary Zoology and Human Biology, Hungary Andreia Adrião --- Maio Biodiversity Foundation, Republic of Cape Verde Tamás Székely --- Department of Evolutionary Zoology and Human Biology, HungaryThe Cream-coloured Courser Cursorius cursor exsul is a data-deficient shorebird distributed across Eurasia and Africa. The subspecies exsul is endemic to the Cape Verde archipelago. In contrast with their mainland breeding sites, where coursers appear to be nomadic and rare... -
Levels and determinants of HIV testing uptake among Ghanaian men
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Samuel H Nyarko --- Department of Demography, College of Public Policy, USA Corey Sparks --- Department of Demography, College of Public Policy, USAThe uptake of HIV testing has always been found to be lower among men compared with women in many developing countries. The aim of this study was to ascertain the level and determinants of HIV testing uptake among men aged... -
Maternal HIV status disclosure to young uninfected children: psychological variables of the mother
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Maretha Visser --- Department of Psychology, South Africa Amukelani Jennifer Hlungwani --- Department of Psychology, South AfricaMothers living with HIV are faced with the dilemma of when and how to disclose their HIV-positive status to their young uninfected children. In this study, a South African sample of mothers living with HIV, with young uninfected children (6–10... -
Megaherbivore response to droughts under different management regimes: lessons from a large African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Izak PJ Smit --- , South Africa Mike JS Peel --- , South Africa Sam M Ferreira --- , South Africa Cathy Greaver --- , South Africa Danie J Pienaar --- , South AfricaDroughts are predicted to increase in frequency and intensity for large parts of Africa. It is unclear how this may impact native grazers in protected areas, and how these outcomes may differ under contrasting management approaches. Reducing artificial water sources... -
Grass community responses to drought in an African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C Wigley-Coetsee --- , South Africa AC Staver --- , United StatesDrought is often discussed as a major perturbation in savanna ecosystems, associated with lasting shifts in savanna structure and functioning. However, historically, droughts have occurred frequently in southern African savannas, suggesting that plants might benefit from being resilient to drought... -
Nutrient fluxes from sediments pose management challenges for the Knysna Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LRD Human --- South African Environmental Observation Network, Elwandle Coastal Node, South Africa R Weitz --- Department of Botany, Institute for Coastal and Marine Research, South Africa BR Allanson --- Knysna Basin Project, Department of Zoology and Entomology, South Africa JB Adams --- Department of Botany, Institute for Coastal and Marine Research, South AfricaThis study investigated seasonal dynamics of benthic nutrient fluxes using in situ benthic chambers deployed over a 24–hour period at the sediment water interface for four distinct regions of the Knysna Estuary. The sediment in the Upper Estuary, Lagoon and... -
Nutrient enrichment as a threat to the ecological resilience and health of South African microtidal estuaries
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JB Adams --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa S Taljaard --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa L van Niekerk --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa DA Lemley --- DST/NRF Research Chair in Shallow Water Ecosystems, South AfricaNutrient pollution in South African estuaries is described using a Driver-Pressure-State-Impact-Response framework. The root cause (‘driver’) of deteriorating water quality is rapid population growth that leads to increasing inputs from wastewater treatment works (WWTWs), stormwater run-off and agricultural return flow... -
Macrobenthic community structure of the Mhlathuze Estuary, a permanently open estuarine embayment in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JI Izegaegbe --- Department of Zoology, South Africa L Vivier --- Department of Zoology, South Africa HMM Mzimela --- Department of Zoology, South AfricaThe Mhlathuze Estuary, an estuarine embayment in northern Zululand, is considered an estuary of national conservation importance. No historical data on the benthic macrofauna are available for the past 20 years, creating a significant gap in our understanding of the... -
High flow variability and storm events shape the ecology of the Mbhashe Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NC James --- South African Institute for Aquatic Biodiversity, South Africa JB Adams --- Institute for Coastal and Marine Research, South Africa AD Connell --- South African Institute for Aquatic Biodiversity, South Africa SJ Lamberth --- South African Institute for Aquatic Biodiversity, South Africa CF MacKay --- Oceanographic Research Institute, South Africa GC Snow --- Institute for Coastal and Marine Research, South Africa L van Niekerk --- Institute for Coastal and Marine Research, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity, South AfricaThe possible impacts of extreme events on the ecology of selected aquatic biota within the Mbhashe Estuary were investigated during a four year (2010–2013) spring sampling programme. During periods of low to average flow conditions the estuary is shallow, turbid... -
Brominated flame retardants in wild bird eggs from the industrialised heartland of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: LP Quinn --- National Metrology Institute of South Africa, South Africa C Roos --- Unit of Environmental Sciences and Management, South Africa R Pieters --- Unit of Environmental Sciences and Management, South Africa A Polder --- Unit of Environmental Sciences and Management, South Africa H Bouwman --- Unit of Environmental Sciences and Management, South AfricaBrominated flame-retardants (BFRs), including polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCD), were analysed in 77 eggs of 13 wild bird species from Gauteng and northern Free State (the industrial heartland of South Africa). BFRs were in all eggs, but not... -
Playing with food: Detection of prey injury cues stimulates increased functional foraging traits in Xenopus laevis
Item type: Journal Article • Journal: African Zoology • Authors: Josie South --- DST/NRF Research Chair in Inland Fisheries and Freshwater Ecology, South Africa Tarryn L Botha --- Unit for Environmental Sciences and Management, South Africa Nico J Wolmarans --- Unit for Environmental Sciences and Management, South Africa Victor Wepener --- Unit for Environmental Sciences and Management, South Africa Olaf LF Weyl --- DST/NRF Research Chair in Inland Fisheries and Freshwater Ecology, South AfricaAnimal behavioural traits determine trophic interaction strength, which in turn structures ecological communities. Behavioural responses to prey cues can inform upon how prey are perceived and detected and therefore determine whether certain stimuli can increase or dampen predatory efficiency and... -
Using stable δ13C and δ15N isotopes to assess foodweb structures in an African subtropical temporary pool
Item type: Journal Article • Journal: African Zoology • Authors: L de Necker --- Water Research Group, Unit for Environmental Sciences and Management, South Africa A Manfrin --- Environmental Campus Birkenfeld, Germany Y Ikenaka --- Water Research Group, Unit for Environmental Sciences and Management, South Africa M Ishizuka --- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Japan L Brendonck --- Water Research Group, Unit for Environmental Sciences and Management, South Africa JHJ van Vuren --- Water Research Group, Unit for Environmental Sciences and Management, South Africa B Sures --- Department of Aquatic Ecology and Centre for Water and Environmental Research (ZWU), Germany V Wepener --- Water Research Group, Unit for Environmental Sciences and Management, South Africa NJ Smit --- Water Research Group, Unit for Environmental Sciences and Management, South AfricaSouthern Africa has one of the highest densities of temporary pools and some of the most understudied temporary wetlands in the world. Additionally, the eastern African annual killifishes (Nothobranchius spp.) are rare in southern Africa and found exclusively in temporary... -
Chondrichthyans as an umbrella species-complex for conserving South African biodiversity
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GJ Osgood --- Department of Biology, Canada ME McCord --- South African Shark Conservancy (SASC), South Africa JK Baum --- Department of Biology, CanadaConservation surrogates, such as umbrella and flagship species, could help focus South Africa’s limited resources for research and management and enhance the conservation gains from marine protected areas (MPAs). Sharks, rays and chimaeras (Chondrichthyes), which are charismatic and ecologically diverse,... -
Nematode assemblages and soil microbial communities in soils associated with glyphosate-resistant soybean
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Chantelle Girgan --- Nematology Unit, Biosystematics Division, Agricultural Research Council-Plant Health and Protection, South Africa Sarina Claassens --- Unit for Environmental Sciences and Management, South Africa Hendrika Fourie --- Unit for Environmental Sciences and Management, South AfricaThe introduction of genetically modified glyphosate-resistant (GR) crops led to increased use of glyphosate, with potential long-term effects on biological soil communities. Abundance and diversity of plant-parasitic and non-parasitic nematodes, as well as microbial community structure in the rhizosphere of... -
Hydropedology in South Africa: Advances, applications and research opportunities
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johan van Tol --- Department of Soil, Crop and Climate Sciences, South AfricaThe need to characterise and quantify hydrological processes in order to manage scarce water resources led to significant progress in the field of hydropedology in South Africa during the past decade. The adoption of hydropedological research by industry and government... -
The developmental growth and quality assessment of five selected cultivars of baby spinach grown in Gauteng province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Nature M Masufi --- Department of Agriculture and Animal Health, South Africa Ambani R Mudau --- Department of Life and Consumer Science, South Africa Hintsa T Araya --- ARC-Roodeplaat, Vegetable and Ornamental Plants, South Africa Fhatuwani N Mudau --- Department of Agriculture and Animal Health, South AfricaBaby spinach is a relatively new crop in South Africa that has commercial significance in retail stores. Currently, seed companies have developed varieties that have not been evaluated locally. Thus, the aim of this study was to investigate the growth,... -
Thermal stability of a vegetable oil-based thermal fluid at high temperature
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Aboubakar Gomna --- Laboratoire Énergies Renouvelables et Efficacité Énergétique (LabEREE), Burkina Faso Kokouvi Edem N’Tsoukpoe --- Laboratoire Énergies Renouvelables et Efficacité Énergétique (LabEREE), Burkina Faso Nolwenn Le Pierrès --- LOCIE, France Yézouma Coulibaly --- Laboratoire Énergies Renouvelables et Efficacité Énergétique (LabEREE), Burkina FasoSynthetic and mineral oils are widely used in high temperature processes (above 200°C) as heat transfer fluids or thermal storage materials. Mineral oils are essentially derived from petroleum that is depleting and synthetic oils are expensive. Furthermore, these oils are... -
Comparative methods for predicting cyanide pollution in artisanal small-scale gold mining catchment by using logistic regression and kriging with GIS
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: L. C. Razanamahandry --- International Institute for Water and Environmental Engineering (2iE), Department of Water and Sanitary Engineering, Laboratory of Water, Burkina Faso P. M. Digbeu --- International Institute for Water and Environmental Engineering (2iE), Department of Water and Sanitary Engineering, Laboratory of Water, Burkina Faso H. A. Andrianisa --- International Institute for Water and Environmental Engineering (2iE), Department of Water and Sanitary Engineering, Laboratory of Water, Burkina Faso H. Karoui --- International Institute for Water and Environmental Engineering (2iE), Department of Water and Sanitary Engineering, Laboratory of Water, Burkina Faso J. Podgorski --- Swiss Federal Institute of Aquatic Science and Technology (EAWAG), Switzerland E. Manikandan --- UNESCO-UNISA Africa Chair in Nanoscience’s/Nanotechnology Laboratories (U2AC2N), College of Graduate Studies, South Africa M. Maaza --- UNESCO-UNISA Africa Chair in Nanoscience’s/Nanotechnology Laboratories (U2AC2N), College of Graduate Studies, South Africa H. Yacouba --- International Institute for Water and Environmental Engineering (2iE), Department of Water and Sanitary Engineering, Laboratory of Water, Burkina FasoIt has been reported that persistent cyanide pollution occurs in artisanal small-scale gold mining (ASGM) catchment areas in Burkina Faso. In the present study, logistic regression (LR) and Regression Kriging (RK) methods were applied to predict cyanide pollution hazard at... -
Optimization of the production and storage of cold in a mechanical compression solar refrigerator
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Adingra Paul Arsène Kouassi --- Laboratoire d’Energie Solaire, Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie, Côte d’Ivoire Siaka Touré --- Laboratoire d’Energie Solaire, Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie, Côte d’Ivoire Wanignon Ferdinand Fassinou --- Laboratoire d’Energie Solaire, Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie, Côte d’IvoireDesign, optimization and realization of high-performance photovoltaic systems are topical issues. Especially in photovoltaic solar refrigeration machines, the cost and the lifetime of electrochemical batteries limit the development of these systems in places well served by solar radiation. The objective... -
Genetic identification of freely traded synanthropic invasive murid rodents in pet shops in Gauteng Province, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Ndivhuwo Maligana --- , South Africa Rolanda S Julius --- , South Africa Tinyiko C Shivambu --- , South Africa Christian T Chimimba --- , South AfricaAlthough synanthropic invasive murid rodents are freely traded in pet shops in South Africa, their taxonomic identities, however, remain largely unknown. Twenty-four murid rodents were sampled from pet shops in four of the five municipalities in Gauteng Province, South Africa... -
Haematology and biochemistry values for Temminck’s pangolins (Smutsia temminckii) from Zimbabwe
Item type: Journal Article • Journal: African Zoology • Authors: Ellen Connelly --- , Zimbabwe Lisa Hywood --- , Zimbabwe Mark Donaldson --- , Zimbabwe Darren W Pietersen --- , ZimbabweBlood biochemistry values are routinely employed during clinical examinations to assess the health of the patient and to identify potential underlying conditions. No blood biochemistry data are currently available for Temminck’s pangolin (Smutsia temminckii), a species that is being confiscated... -
Breakfast consumption and its relationship to sociodemographic and lifestyle factors of undergraduate students in the School of Health Sciences at the University of KwaZulu-Natal
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Raeesa Seedat --- , South Africa Kirthee Pillay --- , South AfricaObjectives: A study was undertaken to investigate breakfast consumption and the sociodemographic and lifestyle profile of undergraduate students in the School of Health Sciences at the University of KwaZulu-Natal (UKZN), and to determine if these factors are related to body... -
Contesting the Subaltern Narrative: The Trickster Trope in the Kenyan Political Autobiography
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Stephen Mutie --- , KenyaThis article is a critique of the idea of subalternity 1 as it is used in the Kenyan political autobiographies of leaders who have reigned but never ruled. 2 The study is largely located within postcolonial theory, with particular emphasis... -
“You can’t bully me anymore”: Coping strategies in a group of psychologists accused of professional misconduct
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Hanlé Kirkcaldy --- , South Africa Esmé van Rensburg --- , South Africa Kobus du Plooy --- , South AfricaUpon receiving a professional misconduct complaint, practitioners are required to manage the complaint process while continuing with their professional work. The stress of a complaint may manifest in emotional difficulties and physical symptoms calling for supportive intervention. We explored the... -
Media images and the gendered representation of chefs
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Beverly (Shih-Yun) Chen --- , New Zealand Alison McIntosh --- , New Zealand Candice Harris --- , New Zealand Warren Goodsir --- , New ZealandImages portrayed in online media may influence societal perceptions of chefs, with the potential to perpetuate gender segregation in the professional kitchen. Little scholarly attention in previous research has been given to the examination of gender and images in hospitality... -
Happiness at work: a phenomenological study of the experiences of hospitality industry employees
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Anne Eline Frederique Melief --- , The Netherlands Jan Arend Schulp --- , The Netherlands Marte Rinck de Boer --- , The NetherlandsThough happiness might be an interesting factor to consider in the discussion on retaining employees, only a limited number of studies on happiness of hospitality employees has been done. This master’s thesis study, rooted in the tradition of the interpretative... -
Monitoring the effects of spatial protection on the reef fish communities of the Pondoland Marine Protected Area, Eastern Cape Province, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- , South Africa JQ Maggs --- , New Zealand SN Porter --- , South Africa WN Dalton --- , South AfricaMonitoring marine protected areas (MPAs) is critical for evaluating their effectiveness and for improving management. In this study, a single-camera baited remote underwater video system (mono-BRUVS) was deployed quarterly at four sites (10–30-m depths) to quantify the reef fish communities... -
Living excluded from the world: essentialism in development discourse and its percolation into Santomean self-perceptions
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Nicola Soekoe --- , South AfricaUsing an analysis of development discourse in and about São Tomé and Príncipe (STP), this article aims to trace the relationship between sociocultural constructions of difference and socio-economic structures of exclusion in the global development project. Using ethnographic data from... -
Patch-scale selection patterns of grazing herbivores in the central basalt plains of Kruger National Park
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Cyanne Young --- , South Africa Hervé Fritz --- , South Africa Erica AH Smithwick --- , United States of America Jan A Venter --- , South AfricaLarge herbivores form an essential component in the ecosystem, because of the impact that they have on their surrounding habitat. In this study, we aimed to evaluate some of the mechanisms behind how herbivores select forage at a patch scale... -
Assessment of physico-chemical parameters of freshwater in the Sidi Abderrahmane reservoir, Safi, Morocco
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: W Belokda --- , Morocco Z Damsiri --- , Morocco L Natij --- , Morocco K Khalil --- , Morocco M Loudiki --- , Morocco A Dahbi --- , Morocco H Achtak --- , Morocco J Richir --- , Belgium B Sabour --- , Morocco K Elkalay --- , MoroccoThe purpose of the study was to assess the water quality in the Sidi Abderrahmane freshwater reservoir (Safi, Morocco). The monitoring data used in the study included physical, chemical, and biological characteristics. The spatial and temporal characteristics of these parameters... -
Using action cameras to estimate the abundance and habitat use of threatened fish in clear headwater streams
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B Hannweg --- , South Africa SM Marr --- , South Africa LE Bloy --- , South Africa OLF Weyl --- , South AfricaSnorkel and electrofishing surveys are the traditional baseline methods for fish surveys in clear headwater streams. However, action cameras provide a non-harmful alternative to monitor freshwater fish populations to develop informed conservation management initiatives. In this paper, estimates from photographs... -
Biomarker responses in African sharptooth catfish, Clarias gariepinus (Burchell, 1822), as indicators of potential metal and organic pollution along the Vaal River system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LJ Connell --- , South Africa GR Jansen van Rensburg --- , South Africa A Avenant-Oldewage --- , South Africa R Greenfield --- , South AfricaThe Vaal River is of considerable economic and environmental importance. It flows through five provinces within South Africa and it is subject to numerous recreational and industrial activities, which often prove detrimental to the health of the system. To determine... -
Summarising biometrics from the SAFRING database for southern African birds
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Sanjo Rose --- , South Africa Robert L Thomson --- , South Africa Hans-Dieter Oschadleus --- , South Africa Alan TK Lee --- , South AfricaBiometrics form a key characteristic of a species. Here, we provide a summary of biometrics held by the South African Bird Ringing Scheme (SAFRING), which was initiated in 1948, including measures of mass and lengths of the tarsus, head, culmen,... -
Citizen science in South Africa: a personal perspective
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: James A Harrison --- , South AfricaThe author recalls some of the achievements of the first Southern African Bird Atlas Project and other citizen science projects that were run by the Animal Demography Unit (then the Avian Demography Unit, ADU). The traditional motivation for such projects... -
Variation in colony sizes of weavers from a citizen science project
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Hans-Dieter Oschadleus --- , South AfricaThe project PHOWN (PHOtos of Weaver Nests) is a citizen science project that collects breeding distributions and colony sizes of weaverbirds (Ploceidae) globally. PHOWN began in mid-2010 and has collected nearly 30 000 records in 9.5 years. This paper provides... -
Chlorophyll a fluorescence as an indicator of heat stress in cotton (Gossypium hirsutum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MM van der Westhuizen --- , South Africa DM Oosterhuis --- , USA JM Berner --- , South Africa N Boogaers --- , South AfricaCotton (Gossypium hirsutum L.) is a major fibre crop that is greatly affected by climatic factors, especially drought and high temperatures. Excessive temperature (above 30 °C) during the reproductive stage (flowering) negatively affects cotton yield potential. Four diverse cotton genotypes... -
Maize (Zea mays) yield and its relationship to soil properties under integrated fertility, mulch and tillage management in urban agriculture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A Shumba --- , Zimbabwe N Dunjana --- , Zimbabwe B Nyamasoka --- , Zimbabwe P Nyamugafata --- , Zimbabwe S Madyiwa --- , Zimbabwe J Nyamangara --- , ZimbabweUrban agriculture improves people’s livelihoods in developing countries. An experiment was carried out to assess effects of soil fertility, mulch and tillage on soil organic carbon (SOC), aggregate stability (Ima), bulk density (BD), steady state infiltration rate (SSIR) and maize... -
Diet of albacore Thunnus alalunga from the waters of Mauritius (western Indian Ocean) inferred from stomach contents and fatty acid analysis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Z Dhurmeea --- , Mauritius H Pethybridge --- , Australia EV Romanov --- , Réunion C Appadoo --- , Mauritius N Bodin --- , SeychellesThe diet of albacore Thunnus alalunga from their spawning ground in the waters of Mauritius was investigated. The stomach contents of 249 albacore individuals, caught by industrial longliners and artisanal fishers, was analysed, and the dominant prey taxa were selected... -
Sustainable shellfish aquaculture in Saldanha Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Santa Marta --- , United Kingdom JG Ferreira --- , United Kingdom GC Pitcher --- , South Africa J Lencart e Silva --- , United KingdomThe carrying capacity for bivalve shellfish culture in Saldanha Bay, South Africa, was analysed through the application of the well-tested EcoWin ecological model, in order to simulate key ecosystem variables. The model was set up using: (i) oceanographic and water-quality... -
Distribution and abundance patterns of two parapagurid hermit crabs (Crustacea: Decapoda: Anomura) along the west and south coasts of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AG Wright --- , South Africa CL Griffiths --- , South Africa TP Fairweather --- , South AfricaA series of over 6 000 research-trawl samples collected along the west and south coasts of South Africa between 1987 and 2014 were analysed for the presence and biomass of two parapagurid hermit crabs, Sympagurus dimorphus and Parapagurus bouvieri. The... -
Zoogeography of marine Bryozoa around South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MK Boonzaaier-Davids --- , South Africa WK Florence --- , South Africa MJ Gibbons --- , South AfricaThe zoogeography of marine Bryozoa around South Africa was investigated using published distribution records, museum catalogues, and an examination of previously unworked bryozoan material in (mostly) museum collections. Although a total of 276 valid species are recognised, it was not... -
Latitudinal changes in siphonophore assemblages across the Atlantic sector of the Southern Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Kuyper --- , South Africa D Thibault --- , France MJ Gibbons --- , South AfricaSiphonophores are commonly considered to be useful indicators of water masses and water-mass movement, but their employment as such across the wider Southern Ocean has not so far been attempted. We redress this here using archived samples, collected during January–February... -
Spatial variation of nutrients and primary productivity in the Rufiji Delta mangroves, Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Minu --- , Tanzania J Routh --- , Sweden JF Machiwa --- , Tanzania S Pamba --- , TanzaniaDeterminations of spatial and temporal variations in organic matter and nutrient dynamics in water and sediments are crucial for understanding changes in aquatic bodies. In this study, we (i) determine the spatial dynamics of dissolved inorganic nutrients, during the transition... -
Kissing cousins: a review of the African genus Limnophis Günther, 1865 (Colubridae: Natricinae), with the description of a new species from north-eastern Angola
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Werner Conradie --- Port Elizabeth Museum (Bayworld), South Africa V Deepak --- Department of Life Sciences, The Natural History Museum, United Kingdom Chad Keates --- National Geographic Okavango Wilderness Project, South Africa David J Gower --- Department of Life Sciences, The Natural History Museum, United KingdomThe African natricine genus Limnophis is represented by two species: Limnophis bicolor Günther, 1865 and Limnophis bangweolicus (Mertens, 1936). They are stout-bodied, semi-aquatic snakes that mostly feed on fish and amphibians, and occur from Botswana and Namibia in the south... -
William Roy Branch: Bibliography, taxonomic discoveries and patronyms
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Michael F Bates --- Department of Herpetology, National Museum, South Africa Aaron M Bauer --- Department of Biology and Center for Biodiversity and Ecosystem Stewardship, Villanova University, USAWilliam Roy Branch (1946–2018) was the most prolific Africa-based herpetologist of his era. His 659 herpetological contributions, spanning 47 years, include field and photographic guides, taxonomic revisions, phylogenies, ecological studies, annotated checklists, conservation assessments, type catalogues, notes on natural history,... -
Prevalence and correlates of interpersonal violence among in-school adolescents in Tanzania
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- , Thailand Karl Peltzer --- , VietnamThe study aimed to assess the prevalence and correlates of interpersonal violence (physical attacks and physical fighting) among school-going adolescents in Tanzania. We analysed an existing data set of 3 765 adolescent learners (mean age = 14 years, SD =... -
Parent-carers of children with physical disabilities in a rural South African setting: Their cultural and social resourcing
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Marubini Christinah Sadiki --- , South Africa Israel Kibirige --- , South AfricaThis study explored lived parent-carer experiences of children with physical disabilities in a rural South African setting. Participants were eight parent-carers (female = 8; age range = 40 to 50 years). The parent-carers completed semi-structured face-to-face interviews on the lived... -
Updated checklist and assemblages of grasshoppers (Orthoptera: Acridomorpha) associated with various habitats, including oases of Central Sahara in Algeria
Item type: Journal Article • Journal: African Zoology • Authors: Abderrahmane Soudani --- , Algeria Abdelhamid Moussi --- , AlgeriaThe grasshopper communities of central Saharan ecosystems (Adrar region, Algeria) were studied at two scales: the first scale considered different biotopes in 23 localities. Random sampling with different traps from February 2016 to February 2019 made it possible to capture... -
Physiological measure of animal welfare in relation to semi-captive African Elephant (Loxodonta africana) interaction programs
Item type: Journal Article • Journal: African Zoology • Authors: Chloe E Grotto --- , South Africa Tanja Wolf --- , South Africa Elizabeth Berkeley --- , United States Stephen Lee --- , United States Andre Ganswindt --- , South AfricaElephant interaction programs, specifically ones that provide elephant back riding, have come under public scrutiny, and little information exists to show whether these activities affect animal welfare. This study examined the impact of human interactions and ride-based activities on physiological... -
Describing sexual dimorphism and fine scale spatial distributions in the Drab Thick-tail Scorpion, Parabuthus planicauda
Item type: Journal Article • Journal: African Zoology • Authors: Jacobus H Visser --- , South Africa Sjirk Geerts --- , South AfricaSouthern Africa contains a diverse and endemic scorpion fauna, but with biological aspects remaining largely unexplored for this group. In order to gain biological insights into an understudied scorpion species, the current study investigates fine-scale spatial distributions and sexual dimorphism... -
Comparison of soil phosphorus fractions after 37 years of wheat production under different management practices in a semi-arid climate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K Ncoyi --- , South Africa CC du Preez --- , South Africa E Kotzé --- , South AfricaCrop residue management is important for enhancing soil fertility and productivity which leads to an increase in crop yields. A long-term trial, situated near Bethlehem in the Eastern Free State in South Africa, was established to determine the influence of... -
Observations of Southern Ground-Hornbill Bucorvus leadbeateri groups in the Kafue National Park, Zambia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jonah Gula --- , United States Chaona G Phiri --- , United KingdomZambia represents a core part of the Southern Ground-Hornbill’s Bucorvus leadbeateri distribution, yet empirical information on the country’s population is scant. From February to September 2017, ground-hornbill sightings were recorded in Kafue National Park in western Zambia to describe population... -
Physico-chemical limnology during the filling phase of Tugwi-Mukosi, a tropical reservoir in Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mhlanga --- , Harare TC Madzivanzira --- , Zimbabwe T Nhiwatiwa --- , Harare P Tendaupenyu --- , Harare M Barson --- , Harare L Marufu --- , Harare N Songore --- , ZimbabweThe physico-chemical limnology and trophic status of the Tugwi-Mukosi reservoir were assessed seven months after impoundment. Water temperature, conductivity, pH, dissolved oxygen, transparency, nitrates, total nitrogen, orthophosphates, total phosphorus and metals (K, Na, Ca, Mg, Cu, Cd, Cr, Ni, Hg,... -
Spatio-temporal distribution of organochlorine pesticide residues in water and sediments of tropical reservoirs: a case study of Bui Reservoir, Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SB Jidauna --- , Ghana R Edziyie --- , Ghana BB Campion --- , GhanaThis study investigated the spatio-temporal distribution of organochlorine pesticides (OCPs) in water and sediments of the Bui Reservoir from June 2017 to May 2018, to provide baseline data for monitoring contamination in the Reservoir. Samples were collected during four seasons... -
Cyanobacterial abundance and microcystins in water, seston and fish tissues in Lake Hora-Arsedi (Ethiopia)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TW Zewde --- , Ethiopia D Kifle --- , Ethiopia JA Johansen --- , Norway TB Demissie --- , Ethiopia JH Hansen --- , Norway Z Tadesse --- , EthiopiaThe phytoplanktonic composition with a focus on cyanobacteria, intra- and extracellular microcystins (MCs) concentrations and MCs concentrations in fish tissues were investigated in Lake Hora-Arsedi (Ethiopia). The phytoplankton community comprised of 40 species in the first phase of the study... -
A survey of phytoplankton and zooplankton communities in the newly created Tugwi-Mukosi reservoir, Zimbabwe, during the filling phase
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mhlanga --- , Zimbabwe TC Madzivanzira --- , Zimbabwe T Nhiwatiwa --- , Zimbabwe P Tendaupenyu --- , Zimbabwe M Barson --- , Zimbabwe L Marufu --- , Zimbabwe N Songore --- , ZimbabweThe plankton assemblages of Tugwi-Mukosi reservoir in south-eastern Zimbabwe were assessed seven months after impoundment to form a baseline for future monitoring and tracking of changes linked to the reservoir’s ontogenetic development processes. While cyanobacteria were the dominant group at... -
Plankton Index of Biotic Integrity (P-IBI) for assessing ecosystem health within the Ouémé River basin, Republic of Benin
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AM Houssou --- , Republic of Bénin DC Adjahouinou --- , Republic of Bénin CA Bonou --- , Republic of Bénin E Montchowui --- , Republic of BéninThis study aims at assessing the impact of organic pollution on plankton communities of the Ouémé River using a Plankton Index of Biotic Integrity (P-IBI) as a tool for ecological heath assessment. Plankton and other environmental data were collected monthly... -
Water quality of the volcanic crater lake, Lake Barombi Kotto, in Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ME Awo --- , Cameroon BA Fonge --- , Cameroon PT Tabot --- , Cameroon JTK Akoachere --- , CameroonCameroon is endowed with many freshwater lakes and rivers but, because of increasing anthropogenic activities, most of these water bodies are gradually being degraded. Lake Barombi Kotto is one of the volcanic crater lakes in Cameroon that serves as a... -
Changing patterns of Schistosoma host snail population densities in Maun, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MJ Chimbari --- , South Africa C Kalinda --- , South Africa N Siziba --- , ZimbabweChanges in the inflow of water into the Thamalakane River had been predicted to alter snail population dynamics and influence the risk of schistosomiasis transmission in Maun. We determined the abundance of schistosome intermediate host snails along the Thamalakane River... -
Time-course of the physiological-stress response in bronze bream Pachymetopon grande following a simulated catch-and-release angling event
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BA Pringle --- , South Africa A-R Childs --- , South Africa EC Butler --- , South Africa AC Winkler --- , South Africa MI Duncan --- , South Africa C Teta --- , South Africa WM Potts --- , South AfricaCatch-and-release (C&R) angling has increased in popularity through its mandatory and voluntary use in fisheries conservation and management. However, research has shown that fish can experience considerable stress during a C&R event. The physiological response of fishes is typically assessed... -
Life-history trade-offs among four sympatric seabreams
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CG Attwood --- , South Africa HAM Ensair --- , South AfricaFish life history is shaped by environmental and ecological circumstances but constrained by phylogeny. Life-history trade-offs can be exposed in a comparison of closely related species with similar niches. We compare the life histories of four closely related and similar-sized,... -
Extending biodiversity conservation with functional and evolutionary diversity: a case study of South African sparid fishes
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Henriques --- , South Africa BQ Mann --- , South Africa ES Nielsen --- , South Africa C Hui --- , South Africa S von der Heyden --- , South AfricaDesigning marine protected area (MPA) networks has relied primarily on species- or habitat-based measures that assess spatial distributions of biodiversity. Molecular and functional data have the potential to unlock information regarding the evolutionary uniqueness and resilience of natural communities, making... -
Physiological stress response and recovery of an important estuarine fishery species, dusky kob Argyrosomus japonicus, after a simulated catch-and-release event
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NK Arkert --- , South Africa A-R Childs --- , South Africa MI Duncan --- , South Africa M Farthing --- , South Africa WM Potts --- , South AfricaCatch and release (C&R) angling is a popular pastime the world over; however, studies have found that fish can experience considerable stress during a C&R event. To determine the effect of a C&R event on angled fishes, the physiological stress... -
Low awareness and use of post-exposure prophylaxis among adolescents and young adults in South Africa: implications for the prevention of new HIV infections
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Anthony Idowu Ajayi --- , Kenya Mohammed Sanusi Yusuf --- , South Africa Elmon Mudefi --- , South Africa Oladele Vincent Adeniyi --- , South Africa Ntombana Rala --- , South Africa Daniel Ter Goon --- , South AfricaThe vulnerability of adolescents and young adults in South Africa to HIV and sexual violence is well documented. Post-exposure prophylaxis (PEP) is available for victims of sexual abuse in the country but awareness of this measure is required to maximise... -
Anatomical, physiological and allometric contrasts of the Cerrado tree Dalbergia miscolobium in full sun and shade environments
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ane Marcela das Chagas Mendonça --- , Brazil Jean Marcel Sousa Lira --- , Brazil Marcelo Rodrigues --- , Brazil Vanessa da Fontoura Custódio Monteiro --- , Brazil Edson Simão --- , Brazil João Paulo Rodrigues Alves Delfino Barbosa --- , BrazilThe Brazilian Cerrado is a mosaic comprised of different vegetation formations and consequently, different environmental conditions. Tree density modifies the availability of light and affects species distribution. Thus, seedlings of species with a broad distribution should show contrasting anatomical, morphological,... -
Influence of the soil on the spatial structure of forest species – preliminary results in a terra firme secondary forest plot, Amapá, Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ronaldo Oliveira dos Santos --- , Brazil Robson Borges de Lima --- , Brazil Rubiene Neto Soares --- , Brazil Bruno de Souza Dantas --- , Brazil Adriano Castro de Brito --- , Brazil Michelle Vasconcelos Cordeiro --- , Brazil Jadson Coelho de Abreu --- , Brazil Breno Marques da Silva e Silva --- , BrazilIn recent years there has been increasing interest in the relationships between edaphic factors in tropical forests due to the complexity and the dynamic nature of plant interactions with the physical environment. This research sought to investigate the correlation of... -
Morpho-agronomical characterisation of local and international sweetpotato germplasm from the South African collection
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sonia IM Naidoo --- , South Africa Sunette M Laurie --- , South Africa Hussein Shimelis --- , South Africa Mark D Laing --- , South AfricaConsiderable genetic diversity is present amongst the sweet potato (Ipomoea batatas (L.) Lam.) accessions that can be selected for breeding. The Agricultural Research Council of South Africa maintains 360 sweetpotato accessions that were bred locally, and introductions from various regions... -
A review of adolescent nutrition in South Africa: transforming adolescent lives through nutrition initiative
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Stephanie V Wrottesley --- , South Africa Titilola M Pedro --- , South Africa Caroline H Fall --- , UK Shane A Norris --- , South AfricaObjective: In South Africa, urbanisation is associated with substantial burdens of adolescent overweight and obesity, making teenagers vulnerable to longer-term non-communicable diseases. In addition, as potential future parents, the nutritional status of adolescents is increasingly recognised as a key driver... -
A Cowrie’s Life: The São Bento and Transoceanic Trade in the Sixteenth Century
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Justine Wintjes --- , South AfricaA collection of money cowries (Monetaria moneta) was discovered in the early 1980s inside a bronze cannon salvaged from the wreck site of the São Bento (1554), at the mouth of the Mzikaba River, Eastern Cape, South Africa. Using an... -
Milk evolution with emphasis on the Atlantogenata
Item type: Journal Article • Journal: African Zoology • Authors: Gernot Osthoff --- , South Africa Moses Madende --- , South Africa Arnold Hugo --- , South Africa Hendrik JB Butler --- , South AfricaThe milk composition of each species is unique, because it has evolved according to specific needs and adaptation to the environment. As milk data from more species became available, an evolutionary trend shows a phylogenetic distinction between Eutherian taxa regarding... -
New insights into the taxonomic status, distribution and natural history of De Witte’s Clicking Frog (Kassinula wittei Laurent, 1940)
Item type: Journal Article • Journal: African Zoology • Authors: Werner Conradie --- , South Africa Chad Keates --- , South Africa Javier Lobón-Rovira --- , Portugal Pedro Vaz Pinto --- , Portugal Luke Verburgt --- , South Africa Ninda L Baptista --- , South Africa James Harvey --- , South Africa Timóteo Júlio --- , South AfricaKassinula is a monotypic genus of small frog in the family Hyperoliidae, only represented by Kassinula wittei. This species morphologically resembles both Kassina Girard, 1853 and Afrixalus Laurent, 1944, and its taxonomic status has been debated for decades. It has... -
A Malagasy element in Continental Africa: a new subspecies of the rare Amauris nossima (Nymphalidae, Danainae) from the Kenyan coast
Item type: Journal Article • Journal: African Zoology • Authors: Tomasz W Pyrcz --- , Poland Steve Collins --- , Kenya Dorota Lachowska-Cierlik --- , Poland David C Lees --- , United Kingdom Szabolcs Sáfian --- , Hungary Klaudia Florczyk --- , PolandAmauris nossima Ward (Nymphalidae, Danainae) was known before this study only from Madagascar and the island of Mayotte, without clearly defined subspecies, but with five names considered invalid or infrasubspecific. It has generally been considered a rare species of butterfly... -
Adding another piece to the southern African Cercopithecus monkey phylogeography puzzle
Item type: Journal Article • Journal: African Zoology • Authors: Birthe Linden --- , South Africa Desiré L Dalton --- , South Africa Taryn MC Ralph --- , South Africa Isabel Silva --- , Mozambique Antoinette Kotze --- , South Africa Peter J Taylor --- , South AfricaThe taxonomy and number of Cercopithecus monkey radiation events in southern Africa are still debated. To date, genetic studies have largely been limited to single specimens per taxon and a scattered geographical distribution. A recent study focusing on South African... -
Seasonal habitat utilisation and morphological characteristics of Chamaeleo dilepis on Telperion Nature Reserve, Mpumalanga, South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Trevor L O’Donoghue --- Applied Behavioural Ecology and Ecosystem Research Unit, Department of Environmental Sciences, University of South Africa, South Africa Kerry Slater --- Applied Behavioural Ecology and Ecosystem Research Unit, Department of Environmental Sciences, University of South Africa, South Africa Leslie R Brown --- Applied Behavioural Ecology and Ecosystem Research Unit, Department of Environmental Sciences, University of South Africa, South AfricaLimited information on the habitat utilisation and seasonal activity of flap-necked chameleons (Chamaeleo dilepis) is available. We investigated habitat utilisation, seasonal distribution, and sexual dimorphism of C. dilepis on Telperion Nature Reserve (a privately protected natural area) in South Africa... -
The reptiles of Tinhosa Grande islet (Gulf of Guinea): A taxonomic update and the role of Quaternary sea level fluctuations in their diversification
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Luis MP Ceríaco --- Universidade do Porto, Portugal Justin Bernstein --- Rutgers University-Newark, USA Ana C Sousa --- Universidade de Évora, Portuga Mariana P Marques --- Universidade de Lisboa, Portugal Aaron M Bauer --- Villanova University, USA Sietze J Norder --- Leiden University Centre for Linguistics, The NetherlandsThe reptile fauna of Tinhosa Grande islet, Gulf of Guinea, comprises an endemic skink, Trachylepis adamastor, and an unidentified species of gecko of the genus Hemidactylus. Until recently, no molecular data were available for either species, impeding their phylogenetic placement... -
Burnout and ill-wellbeing of talented professional nurses: The moderating role of dispositional employability
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Nicolene Barkhuizen --- , South Africa Alex Molefi --- , South AfricaWe investigated the moderating role of dispositional employability on the relationship between work burnout and ill-wellbeing of professional nurses. Our sample consisted of 433 professional nurses (female = 88.2%; black = 96.5%) from the North-West Province, South Africa. The nurses... -
Eucalypt susceptibility towards the invasive Glycaspis brimblecombei Moore (Hemiptera: Aphalaridae) in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Samantha J Bush --- , South Africa Bernard Slippers --- , South Africa Brett P Hurley --- , South AfricaGlycaspis brimblecombei (Hemiptera: Aphalaridae) is a eucalypt feeder native to Australia. Infestations of G. brimblecombei can cause leaf wilt, dieback and death in weak or severely infested plants. In many countries where G. brimblecombei has been introduced, patterns of susceptibility... -
Pheromones as management tools for non-Scolytinae Curculionidae: development and implementation considerations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Luki-Marie Scheepers --- , South Africa Jeremy D Allison --- , Canada Marc C Bouwer --- , South Africa Egmont R Rohwer --- , South Africa Bernard Slippers --- , South AfricaFor the large family Curculionidae, the number of species considered pests is expected to increase due to global movement of plant and soil material, as well as climate change. Pheromones are increasingly popular for use in pest management programmes, either... -
Evaluation of phytoremediation effects of chicken manure, urea and lemongrass on remediating a lead contaminated soil in Kabwe, Zambia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Yui Yoshii --- , Japan Isabell von Rein --- , USA Kabenuka Munthali --- , Zambia Mukuka Mwansa --- , Zambia Hokuto Nakata --- , Japan Shota Nakayama --- , Japan Mayumi Ishizuka --- , Japan Yoshitaka Uchida --- , JapanHigh levels of lead (Pb) in the soil is a serious issue in the city of Kabwe, Zambia. Phytoremediation is an effective approach to revive the life-supporting functions of the soils. Locally available soil amendments, such as chicken manure, can... -
Phosphorus availability and fractions in a humic soil amended with poultry manure and lime
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: NP Mkhonza --- , South Africa NN Buthelezi-Dube --- , South Africa P Muchaonyerwa --- , South AfricaPhosphorus (P) availability in highly weathered soils is limited. The objective of this study was to determine the effects of poultry manure (PM) and lime on P availability in humic soils. The soils were amended with lime and PM, separately... -
Assessment of genetic diversity in sorghum germplasm using agro-morphological traits
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Thulo Sejake --- , South Africa Nemera Shargie --- , South Africa Riann Christian --- , South Africa Toi Tsilo --- , South AfricaSorghum is one of the most important cereal crops grown in arid/semi-arid regions of the world. Despite its importance, sorghum production and productivity are constrained by the use of low yielding cultivars, which are susceptible to biotic and abiotic stresses... -
Mixed-species plantations of Eucalyptus and Acacia mangium increase labile carbon and phosphorus levels in Ferralsol soils in the Cerrado biome, Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Wilbert Valkinir Cabreira --- , Brazil Marcos Gervasio Pereira --- , Brazil Fabiano de Carvalho Balieiro --- , Brazil Eduardo da Silva Matos --- , Brazil Renato de Aragão Ribeiro Rodrigues --- , Brazil Raissa Nascimento dos Santos --- , BrazilIn order to clarify the effect of mixed planting in the dynamics of phosporus (P), we assessed the fractions of this element in mixed plantings of Eucalyptus urophylla × E. grandis (Urograndis) and Acacia mangium in a tropical soil clay,... -
Presenting a PhD research proposal: A guide for commerce students
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Richard Shambare --- , South AfricaThis paper provides commerce PhD students with advice on how to structure research proposals. In particular, the paper addresses the question: How should a PhD candidate in entrepreneurship (or another commerce discipline) present a research proposal? The paper guides students... -
Project planning and control analysis for suburban photovoltaic alternative electric power supply in Southwestern Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ibikunle Olalekan Ogundari --- , Nigeria Funso Ayotunde Otuyemi --- , UKAlternative photovoltaic (PV) electric power systems are designed for suburban residential complexes in Nigeria’s Southwestern region as succour to erratic grid power supply. The initial project in suburban Ibadan, Oyo State was analyzed as model for other stakeholders in the... -
Effects of egg shell meal on the performance and haematology of layers and their egg quality
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Uchele Okpanachi --- , Nigeria Khalid Aliyu Yusuf --- , Nigeria Maryann Kehinde Ikubaje --- , Nigeria Gift Cincin Amaje Okpanachi --- , NigeriaIn an attempt to achieve Sustainable Development Goals numbers one and two, eggshell meal was incorporated into layers diets to replace bone meal. Seventy-two point of lay birds were utilized in a nine-week experiment. Four experimental diets were formulated consisting... -
Prevalence of succinate dehydrogenase deficiency in paragangliomas and phaeochromocytomas at a tertiary hospital in Cape Town: a retrospective review
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Cassandra Bruce-Brand --- , South Africa Abraham C van Wyk --- , South Africa -
Prevalence and clinical risk factors for morphometric vertebral fractures in older subjects in KwaZulu-Natal
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: M Esaadi --- , South Africa F Paruk --- , South Africa B Cassim --- , South Africa -
Assessment of subsurface riverbed clogging by fine sediments in a semi-arid catchment of north-western Algeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AM Bendaoud --- , Algeria KA Haddou --- , Algeria AM Taleb --- , Algeria NO Belaidi --- , AlgeriaIn semi-arid regions, natural and anthropogenic disturbances increase the input of fine particles and their subsequent accumulation in streambeds sediment. The clogging of streambeds sediment is caused by the infiltration of fine particles at depth, reducing hydraulic conductivity (K) and... -
Mass developments of Euglena sanguinea Ehrenberg in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Janse van Vuuren --- , South Africa A Levanets --- , South AfricaBlooms of Euglena sanguinea Ehrenberg were observed at two different locations in South Africa, Mpumalanga province during 2016 and Limpopo province during 2020. Besides being responsible for a blood-red discolouration of the water, the species is also toxic, causing fish... -
Longitudinal species turnover rates are predictable and should guide location of sampling sites for South African river surveys to assess aquatic biodiversity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- , South Africa FC de Moor --- , South AfricaRepresentative samples of biota collected relative to environmental gradients are important for measuring present distributions and predicting shifts in distribution of taxa in response to climate change or reduced river connectivity. Based on river ecology theory and established measures of... -
Mobile phone addiction and cognitive failures in Chinese adolescents: The role of rumination and mindfulness
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bin Zhang --- , China Yu Peng --- , China Xin-sen Luo --- , China Hui-li Mao --- , China Yan-hong Luo --- , China Rong-ting Hu --- , China Si-cheng Xiong --- , ChinaWe aimed to explore the relationships between mobile phone addiction and cognitive failures in adolescents. Our study sample consisted of 816 adolescents from two high schools in China (female = 413; mean age = 15.86 years, SD = 0.80 years)... -
Description of two new species of the africana-group of the Genus Gryllotalpa, with a redescription of Gryllotalpa africana Beauvois (Orthoptera: Gryllotalpidae)
Item type: Journal Article • Journal: African Zoology • Authors: Alain Simeu-Noutchom --- , Cameroon Sévilor Kekeunou --- , Cameroon Alain Christel Wandji --- , Cameroon Marcelle Mbadjoun Nzike --- , Cameroon Philène Corinne Aude Um Nyobe --- , Cameroon Alfiery Laurel Djomnang Nkwala --- , Cameroon Linda Gaelle Guiadem Simo --- , CameroonThree species of the africana-group of the Genus Gryllotalpa (Orthoptera: Gryllotalpidae) were recorded from Cameroon during an investigation from March 2016 to March 2018: Gryllotalpa africana Beauvois from Buea and Tombel, and two new species, Gryllotalpa tombelensis Simeu-Noutchom and Kekeunou... -
Technico-economic comparison of heat transfer fluids or thermal energy storage materials: A case study using Jatropha curcas oil
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kokouvi Edem N’Tsoukpoe --- , Burkina Faso Nolwenn Le Pierrès --- , France Yao Manu Seshie --- , Burkina Faso Yézouma Coulibaly --- , Burkina FasoThermal oils are omnipresent in processes using heat at high temperature as heat transfer fluids (HTFs) as well as thermal storage materials (TESMs), particularly in concentrating solar plants. In this study, a methodology for technico-economic comparison of HTF and TESM... -
Stock separation of the shallow-water hake Merluccius capensis in the Benguela ecosystem using otolith shape analysis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ENG Shoopala --- , Namibia MR Wilhelm --- , Namibia SC Paulus --- , NamibiaThe fishing industry is an important economic sector in Namibia and South Africa, with the shallow-water hake Merluccius capensis being an important target species. Recent genetic studies of M. capensis found two stocks in the Benguela Current Large Marine Ecosystem,... -
Large-scale movements and site fidelity of two bull sharks Carcharhinus leucas estimated from a double-tagging experiment at Réunion Island (southwest Indian Ocean)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Soria --- , France Y Tremblay --- , France A Blaison --- , France F Forget --- , France E Crochelet --- , Réunion L Dagorn --- , FranceSince 2011, the mean number of bites per year by bull sharks Carcharhinus leucas has increased markedly at Réunion Island. To predict areas and periods of increased risk, we need to better understand the space-use dynamics of individual sharks. In... -
Facing challenges and drawing strength from adversity: Lived experiences of Tibetan refugee youth in exile in India
Item type: Journal Article • Journal: Indo-Pacific Journal of Phenomenology • Authors: Kiran Dolly Sapam --- , India Parisha Jijina --- , IndiaThe current study is a qualitative investigation aimed at exploring the lived experiences of Tibetan youth who had escaped to India as unaccompanied minors and since then have been living as refugees in India without their parents. The study attempts... -
On the possible phenomenological autonomy of virtual realities
Item type: Journal Article • Journal: Indo-Pacific Journal of Phenomenology • Authors: Mathias Kofoed-Ottesen --- , DenmarkIn the following article, I examine Martin Heidegger’s philosophy of dwelling with a view to its importance for the concept of ‘place’. It is my interest to show how a phenomenological concept of place can elucidate the phenomenology of virtual... -
‘Who is this body?’ – A qualitative user study on ‘The Machine to be Another’ as a virtual embodiment system
Item type: Journal Article • Journal: Indo-Pacific Journal of Phenomenology • Authors: Jonathan Harth --- , Germany Maximilian Brücher --- , Germany Nele Kost --- , Germany Ann-Danielle Hartwig --- , Germany Bernhard Schäfermeyer --- , Germany Erwin Holkin --- , Germany Hanna Gottschalk --- , GermanyLike no other medium, virtual reality (VR) offers new possibilities to alter the perception of reality. These possibilities are mainly related to the feeling of presence in a virtual environment. With the VR performance ‘The Machine to be Another’ (TMTBA),... -
Disappearing boundaries? Reality, virtuality and the possibility of “pure” mixed reality (MR)
Item type: Journal Article • Journal: Indo-Pacific Journal of Phenomenology • Authors: Daniel O’Shiel --- , ChileThis article argues that reality and virtuality are still very much phenomenologically distinguishable, although this might not be the case forever. I argue for two main types of virtuality – one inherently involved in the dynamic horizons of perceptual experiences,... -
Residual fertiliser and liming impacts in a long-term Acacia mearnsii trial
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Louis Titshall --- , South AfricaSixth rotation growth measurements of an Acacia mearnsii fertiliser trial established to test the effect of nitrogen (N), phosphorus (P), potassium (K) and lime application on growth and bark production, showed that residual P and lime effects are present. First... -
Population ecology of Red-necked Spurfowl Pternistis afer in the coastal towns of the Eastern Cape province, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Johann H van Niekerk --- , South AfricaConserved remnants of indigenous vegetation patches and corridors are regarded as important components of the built environment for the survival of birds. Field research was conducted at Boknes and Cannon Rocks in the Eastern Cape Province, South Africa to study... -
A psychobiographical study of Temujin’s (Genghis Khan) personality
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bao Xiaohong --- , China Dong Jia --- , China Zheng Jianhong --- , ChinaThis psychobiography study of Temujin employed the Personality Adjective Evaluation Scale, the Personality Adjective Classification Survey, and the Delphi method to characterise Temujin’s personality traits and probable influences. One hundred and thirty-two participants rated Temujin’s personality on 248 evaluation words,... -
Concurrent low-carbohydrate, high-fat diet with/without physical activity does not improve glycaemic control in type 2 diabetics
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Gerrit J Breukelman --- , South Africa Albertus K Basson --- , South Africa Trayana G Djarova --- , South Africa Cornelia J Du Preez --- , South Africa Ina Shaw --- , South Africa Heidi Malan --- , South Africa Brandon S Shaw --- , South Africa -
Zooplankton composition of temporary pools within the lower Nata River channel, Botswana, during dry season
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DT West --- , South Africa LL van As --- , South AfricaThe Nata River is a seasonal system situated in the semi-arid north-eastern Botswana, where rainfall is unpredictable and drought is common. The annual flow of approximately 279 million cubic meters is regionally significant and it forms an important resource for... -
First record of Chlamydomonas proboscigera in the southern hemisphere
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Laubscher --- , South Africa S Janse van Vuuren --- , South Africa A Levanets --- , South Africa S Barnard --- , South AfricaChlamydomonas proboscigera is a unicellular, ellipsoidal-to-spherical chlorophyte distinguished by a flattened papilla, a large spherical pyrenoid and a disc-shaped stigma located anterior in a cup-shaped chloroplast. The species is common in eutrophic water, but also occurs in terrestrial environments, such... -
Diversity of macrophytes in relation to environmental conditions in wetlands along the lower part of the Gilgel Abay River catchment in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet --- , Ethiopia Seyoum Mengistou --- , Ethiopia Bikila Warkineh --- , EthiopiaThe environmental conditions in wetlands affect the diversity, composition, and distribution of their macrophyte communities. This study investigated the diversity of macrophytes as related to environmental conditions in wetlands of the lower part of Gilgel Abay River catchment in Ethiopia... -
Phosphorus extraction by selected methods in alkaline and calcareous soils after mono-ammonium phosphate application at different rates
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AE Venter --- , South Africa CC du Preez --- , South AfricaLittle research has been done on extractable phosphorus (P) in alkaline and calcareous irrigated soils of South Africa. This study aimed to quantify extractable P by selected methods in these soils after application of mono-ammonium phosphate (MAP) at different rates... -
A comparison of the results of phosphorus analyses of alkaline and calcareous soils amongst South African laboratories
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AE Venter --- , South Africa CC du Preez --- , South AfricaLarge areas of alkaline and calcareous soils are irrigated in South Africa. For these soils, proper fertilisation programs based on soil phoshorus (P) analyses are required. Little is known about P analyses of alkaline and calcareous soils. The study aimed... -
Prey delivery to a breeding colony of Caspian Terns Hydroprogne caspia on the west coast of South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Davide Gaglio --- , South Africa Jessie Walton --- , South Africa Peter G Ryan --- , South AfricaThe Caspian Tern Hydroprogne caspia is widely distributed, but it is rare and little studied in southern Africa. We recorded the prey delivered by Caspian Terns to a breeding colony near the Berg River Estuary on the west coast of... -
The impact of orphanage tourism on Bali
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Rodney Westerlaken --- , the NetherlandsThis article deals with the phenomenon of orphanage tourism in Bali, Indonesia. Context is given based on a recent published report by the Dutch government on the impact of orphanage tourism. Findings are derived from larger-scale qualitative research based on... -
How do employees really feel about team building? An exploratory netnographic investigation
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Ran Zhang --- , the Netherlands Erwin Losekoot --- , the NetherlandsThis study explored employees’ attitudes towards team-building events. Anonymous qualitative data were obtained using netnography and analysed through an interpretive content analysis approach. The data analysis yielded sixteen codes and five main themes, on the basis of which employees’ attitudes... -
Social anxiety, maladaptive cognition, mobile phone addiction, and perceived social support: A moderated mediation model
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Hui-Ling Zhou --- , China Huai-Bin Jiang --- , China Bin Zhang --- , China Han-Yu Liang --- , ChinaThis study tested the mediation effect of maladaptive cognition in the association between social anxiety and mobile phone addiction, and the moderating role of perceived social support in that relationship. A sample of 468 Chinese university students (female = 43.6%;... -
Long-term variation in the breeding diets of macaroni and eastern rockhopper penguins at Marion Island (1994–2018)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: FE Dakwa --- , South Africa PG Ryan --- , South Africa BM Dyer --- , South Africa RJM Crawford --- , South Africa PA Pistorius --- , South Africa AB Makhado --- , South AfricaPopulations of the macaroni penguin Eudyptes chrysolophus and the eastern rockhopper penguin E. filholi breeding at Marion Island (Prince Edward Islands) in the sub-Antarctic Indian Ocean decreased from 1994 to 2018. We examined their diets when rearing chicks during this... -
Distribution patterns of intertidal oribatid mites (Acari, Oribatida) from South African shores and their relationship to temperature
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Pfingstl --- , Austria J Baumann --- , Austria J-A Neethling --- , South Africa I Bardel-Kahr --- , Austria EA Hugo-Coetzee --- , South AfricaA faunistic study of the intertidal oribatid mite fauna of South Africa’s coastline revealed the presence of four species from three families, showing specific biogeographic patterns. Their occurrences show a clear east–west divide, with a small gap near East London... -
When cooling is worse than warming: investigations into the thermal tolerance of an endemic reef fish, Boopsoidea inornata
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Allison --- , South Africa C Muller --- , South Africa A-R Childs --- , South Africa W Froneman --- , South Africa LA Bailey --- , South Africa WM Potts --- , South AfricaRecent investigations suggest that global warming is likely to alter temperature regimes along the southeastern coastline of South Africa through the increased frequency of upwelling events. Identifying thermal thresholds is fundamental in predicting the response of marine ectotherms to rapidly... -
When the flathead mullet left St Lucia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AK Whitfield --- , South AfricaThe St Lucia estuarine system on the east coast of South Africa is a declared World Heritage Site and Ramsar Site of International Importance. A major ecological feature of St Lucia during the last century was the annual spawning migration... -
Testing assertions of dietary specialisation: a case study of the diet of Aparallactus capensis
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Bryan Maritz --- University of the Western Cape, South Africa Aadam Rawoot --- University of the Western Cape, South Africa Ryan van Huyssteen --- University of the Western Cape, South AfricaThe lack of detailed natural history information required to precisely characterise the diets of many organisms often results in the use of generalised descriptions of those diets. These descriptions can become dogmatic, and should be challenged with novel observational data... -
The impact of trauma on South African women with HIV: The role of anxiety and physical symptomology
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Abigail S Robbertz --- , USA Martha N Ishiekwene --- , USA Olivia L Hucks --- , USA Lisa Armistead --- , USARates of trauma and HIV are high in South Africa, and those who experience more trauma have higher levels of psychological distress. This cross-sectional study examined trauma, physical, and mental health among black South African women living with HIV (WLH)... -
Demographic variables as drivers of innovation in small accommodation businesses: A case of South Africa and Zimbabwe
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Lovemore Tendai Chipunza --- , South Africa Matsidiso Nehemia Naong --- , South AfricaMost of the evidence that has been documented on the impact of demographic factors on innovation has primarily focused on large businesses, and there has been little focus on small businesses. The literature continues to confirm that innovation is a... -
Critical Literary Arts in Action: The Decolonial Project of Ba re e ne re within and beyond Lesotho
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Lineo Segoete --- , Lesotho Zachary Rosen --- , LesothoIn this article we explore the historical construction of literary infrastructure established in Lesotho. Building on an analysis of Sesotho language orthography by Dr Litšepiso Matlosa, we recall the colonial genesis of written Sesotho by Swiss and French missionaries. As... -
Topo-edaphic environment and forest plantation disturbance explain patterns of grassland species richness, composition and structure in an agro-ecological landscape, Maputaland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AP Starke --- , South Africa TG O’Connor --- , South Africa CS Everson --- , South AfricaGrasslands of the Maputaland coastal plain are biologically diverse and provide a variety of ecosystems services. Yet grasslands in this region are vulnerable to continuing development by plantation forestry that provides economic benefits to local communities. In order to provide... -
Topo-edaphic environment and forestry plantation disturbance affect the distribution of grassland forage and non-forage resources, Maputaland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AP Starke --- , South Africa TG O’Connor --- , South Africa CS Everson --- , South AfricaGrasslands are integral to rural livelihoods in southern Africa, because they provide hydrological regulation services and a variety of plant resources, including livestock fodder, medicines, and food products. To ensure ongoing provision of these resources in rapidly developing rural landscapes,... -
Characterisation of Eucalyptus rhizospheric communities using fatty acid methyl ester (FAME) profile analysis
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Chimdi Nwigwe --- , South Africa Annabel Fossey --- , South Africa Olga de Smidt --- , South AfricaHybrid vigour is exploited in Eucalyptus forestry through the production of interspecific hybrids. Hybrids are deployed via cuttings that often suffer from poor rooting. Rhizospheric microorganisms have been associated with rooting enhancement, therefore knowledge of the diversity of microorganism communities,... -
Effects of biostimulants on tissue and rhizospheric acid phosphatase activity of chickpea genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Rebahlotse Mapula Moloto --- , South Africa Felix D Dakora --- , South Africa Puffy Soundy --- , South Africa Sipho Thulane Maseko --- , South AfricaAlthough the application of biostimulants to soils and plants affects their phosphatase activity, this has not been shown in chickpea (Cicer arietinum L.) grown under South African conditions. In this study, chickpea genotypes were grown in silty-loam and silty-clay-loam soils... -
Adult attachment: Its mediation role on childhood trauma and mobile phone addiction
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Han-Yu Liang --- , China Bin Zhang --- , China Huai-Bin Jiang --- , China Hui-Ling Zhou --- , ChinaThis study aimed to examine the extent to which adult attachment mediates the relationship between childhood trauma and mobile phone addiction. The sample consisted of 263 Chinese college students in Fujian (female = 65.4%; mean age = 19.45 years, SD... -
A fortunate self-actualised man: A psycho-biographical study of Yuan Longping
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jianhong Zheng --- , Chaohong Ji --- , China Wu-Ming He --- ,To develop a psycho-biographical profile on Yuan Longping, a tireless hybrid rice research scientist, we performed a content analysis of personality adjectives. For dependability of the analysis, we utilised the methods of “prototypical scenes” and “key factors of growth”. Our... -
The Prophet in Music: Lyrical Representations of the Shepherd Bushiri Discourse
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Ken Junior Lipenga --- , MalawiMusic plays various roles in contemporary Africa. This paper examines a specific role — how songs contribute to the public image of a specific personality, Prophet Shepherd Bushiri. The paper argues that the image that people have come to know... -
Correlation between vitamin D serum levels and severity of diabetic retinopathy in patients with type 2 diabetes mellitus
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Gauhar Nadri --- , India Sandeep Saxena --- , India Apjit Kaur --- , India Kaleem Ahmad --- , India Pragati Garg --- , India Abbas Ali Mahdi --- , India Levent Akduman --- , USA Katarina Gazdikova --- , Slovakia Martin Caprnda --- , Slovakia Pavol Vesely --- , Slovakia Peter Kruzliak --- , Czech Republic Vladimir Krasnik --- , SlovakiaPurpose: To study the correlation of serum vitamin D levels with quantitative (central subfield thickness [CST], cube average thickness [CAT]), cross-sectional (disorganisation of retinal inner layer [DRIL] and ellipsoid zone [EZ]) and topographic parameters (retinal pigment epithelium [RPE]) on spectral... -
Be active: a food-based dietary guideline for elderly South Africans
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Sanjoy Saha --- , United States Wilna Oldewage-Theron --- , United States Carin Napier --- , South AfricaThe goal of this paper is to support the ‘Be active!’ food-based dietary guideline (FBDG) for South Africans of seven years and older by means of a technical guideline regarding physical activity (PA) specifically for the elderly. Optimal nutrition and... -
The distribution of dinoflagellate cyst assemblages in recent sediments of the Oualidia Lagoon, Morocco, with a focus on toxic species
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Chaira --- , Morocco H Rhinane --- , Morocco B Ennaffah --- , Morocco S Maimouni --- , Morocco R Sagou --- , Morocco S Loulad --- , Morocco A BenMhamed --- , Morocco A Agouzouk --- , Morocco S BenBrahim --- , Morocco E Masseret --- , France M Laabir --- , FranceHarmful algal blooms (HABs) are becoming widely distributed and more frequent, threatening socioecosystems and human health. We determined species composition, abundance and spatial distribution of dinoflagellate cysts in the upper sediment of the Oualidia Lagoon located on the Atlantic coast... -
The first report of Naobranchia cygniformis Hesse, 1863 (Copepoda: Lernaeopodidae) off South Africa, with a redescription of the adult female
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SM Dippenaar --- , South Africa MM Sebone --- , South AfricaNaobranchia cygniformis Hesse, 1863 is one of 21 accepted species of the genus Naobranchia, which is distinguished from other genera in the family Lernaeopodidae by the possession of ribbon-like maxillae. The original description of N. cygniformis lacked detail concerning the... -
Heavy metal profiles in limpets and algae on the Eastern Cape coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Mbandzi --- , South Africa MDV Nakin --- , South Africa GM Saibu --- , South Africa AO Oyedeji --- , South AfricaHeavy metal pollution is an increasing threat to the marine environment and is a major health concern. Both marine limpets and algae have been employed as biomonitors elsewhere in the world, but there are few or no data for these... -
Day/night patterns of habitat use by dogfish sharks (Squalidae) at photic and subphotic warm-temperate reefs: evidence for diel movements and size- and sex-segregation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Juby --- , South Africa ATF Bernard --- , South Africa A Götz --- , South AfricaDogfish sharks (genus Squalus) demonstrate complex distribution patterns that may increase their vulnerability to selective overfishing. This study investigated the day/night reef-use patterns in a population of dogfish (presumably Squalus acutipinnis) on shallow photic (13–35 m) and deep subphotic (51–99... -
Internalised HIV-related stigma associated with physical inactivity in people with HIV and AIDS: A cross-sectional study from Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Davy Vancampfort --- , Belgium Peter Byansi --- , Uganda Eugene Kinyanda --- , Uganda Richard Serunkuma Bbosa --- , Uganda James Mugisha --- , UgandaAim: The aim of the current study was to explore correlations between continuous physical activity (PA) levels and HIV-related stigma and differences in HIV-related stigma between those who meet versus those who do not meet the international PA recommendation of... -
Investigating the effects of hypersalinity on the cardiac performance of the invasive gastropod Melanoides tuberculata (Müller, 1774)
Item type: Journal Article • Journal: African Zoology • Authors: TJ de Haas --- , South Africa LJ Connell --- , South Africa R Greenfield --- , South AfricaAnthropogenic activities have propelled the exploitation of natural environments, which along with climate change have resulted in salinity intrusion to freshwater ecosystems worldwide. To determine the extent the hypersalinity stressor has on freshwater ecosystems, physiological cardiac responses in the freshwater... -
Reproduction, sexual dimorphism and predation in Mochlus sundevallii in southern Africa (Reptilia: Sauria, Scincidae)
Item type: Journal Article • Journal: African Zoology • Authors: Joaquín Verdú Ricoy --- , South Africa Phomolo Mashinini --- , South Africa Jacqueline Goedhals --- , South Africa Neil Heideman --- , South AfricaThe skink Mochlus sundevallii is widespread throughout the African continent, but no detailed research on its ecology, reproduction and sexual dimorphism patterns has been performed yet. Here we address phenotypic and ecological data of M. sundevallii from the southernmost part... -
Hot and bothered: alterations in faecal glucocorticoid metabolite concentrations of the sungazer lizard, Smaug giganteus, in response to an increase in environmental temperature
Item type: Journal Article • Journal: African Zoology • Authors: J Scheun --- , South Africa R Campbell --- , South Africa A Ganswindt --- , South Africa T McIntyre --- , South AfricaDespite the commonly held belief that reptiles are immune to extreme temperatures, global warming is predicted to result in the loss of 40% of all reptile species by 2080. In order to understand the effects of elevated temperature on African... -
Green technology for bioremediation of the eutrophication phenomenon in aquatic ecosystems: a review
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Mostafa El-Sheekh --- , Egypt Mohamed M Abdel-Daim --- , Saudi Arabia Mohamed Okba --- , Egypt Samiha Gharib --- , Egypt Asgad Soliman --- , Egypt Hala El-Kassas --- , EgyptEutrophication is a serious phenomenon that leads to vigorous algal blooms that alters the structure of ecosystems. It is caused by non-point sources of nutrients; as nitrogen and phosphorus, and point sources as wastewater effluent. Distinctive algae groups are responsible... -
A review of the limnology of the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Mangaliso J Gondwe --- , Botswana Mike Murray-Hudson --- , Botswana Nashaat M Mazrui --- , Botswana Oliver Moses --- , Botswana Edwin Mosimanyana --- , Botswana Oarabile Mogobe --- , BotswanaWater quantity and quality are important aspects in the management of aquatic ecosystems, including wetlands. This paper has integrated available knowledge from literature on the limnology of the Okavango Delta, Botswana. The current near-natural solute concentrations in the inflow waters... -
Impact of flood regime on phytoplankton communities in the large African reservoir, Lake Nasser, Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Shymaa S Zaher --- , Egypt Walid Aly --- , EgyptLake Nasser is a reservoir of freshwater for drinking and irrigation in Egypt and it constitutes an important share in the fisheries sector. This study aims to acquire a better understanding of the status of phytoplankton distribution in Lake Nasser... -
Effects of atrazine on the endocrinology and histoarchitecture of the testes in African Catfish, Clarias gariepinus (Burchell, 1822)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PA Opute --- , Nigeria IP Oboh --- , Nigeria JE Asouzu --- , South Africa N Pilani --- , South Africa EF Mbajiorgu --- , South AfricaAquatic ecosystems often receive a wide spectrum of pollutants introduced directly or indirectly. The herbicide atrazine, an endocrine disrupting chemical (EDC), frequently contaminates potable water supplies and aquatic ecosystems. Studies suggest atrazine induced alterations in the neuroendocrine system along the... -
Is happiness based on psychological harmony? Exploring the mediating role of psychological harmony in the relationship between personality characteristics and occupational well-being
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Yuzhu Zhang --- , China Leigang Zhang --- , China Yunlong Wu --- , ChinaThis study proposed and tested a theoretical model for specifying the structural relationship between personality characteristics (including core self-evaluation, social comparison, philosophies of human nature, psychological capital), psychological harmony, and occupational well-being in a higher education setting. We analysed data... -
Vegetation classification for the management of large mammalian herbivores: a case study at Mushingashi Conservancy, Central Province, Zambia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Bruce W Clegg --- , Zimbabwe Timothy G O’Connor --- , South Africa Alan D Manson --- , South AfricaThe vegetation of Mushingashi Conservancy in central Zambia was classified and mapped to provide a template for wildlife management. Putative vegetation types were delineated using Landsat 8 imagery, then sampled with 73 plots for vegetation composition and structure, and topo-edaphic... -
Comparison of seed germination and vigour in low and high phytic acid maize synthetic populations and commercially available hybrids
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mohammed A Elgorashi Bakhite --- , South Africa Nkanyiso J Sithole --- , South Africa Lembe S Magwaza --- , South Africa Alfred O Odindo --- , South Africa John Derera --- , South AfricaPlant breeders have focused on reducing phytic acid in maize seeds to improve grain nutritional quality. However, this could have negative effects on seed quality. The objective of this study was to compare seed performance of low and high phytic... -
Growth and yield of African ginger in response to application of organic fertiliser
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Phomolo Maphothoma --- , Riana Kleynhans --- , Gerhard Prinsloo --- , Salmina N Mokgehle --- , Ian du Plooy --- , Hintsa T Araya --- ,African ginger (Siphonochilus aethiopicus) is in high demand for medicinal use. The plant does not multiply after being harvested, as it is destroyed in the process. The species is now facing extinction as a result of over harvesting. In order... -
Laparoscopic inguinal lymph node dissection in carcinoma of the vulva: experience and intermediate results at one institution
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Setheme Daniel Mosehle --- , South Africa Franco Guidozzi --- , South AfricaObjective: The goal of the study was to assess the feasibility of Laparoscopic Minimally Invasive Inguinal Lymph Node Dissection (L-MILND) for carcinoma of the vulva where sentinel lymph node biopsy could not be done. Laparoscopic Minimally Invasive Inguinal Lymph Node... -
Biogeographical patterns of grasses (Poaceae) indigenous to South Africa, Lesotho and Eswatini
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Marike Trytsman --- , South Africa Francuois L Muller --- , South Africa Craig D Morris --- , South Africa Abraham E van Wyk --- , South AfricaThe ecological and economical importance of African grasses in sustaining animal production prompted studies to quantify the wealth of grass genetic resources indigenous to southern Africa. Plant collection and occurrence data were extracted from two southern African datasets, BODATSA and... -
Organisational trust and commitment among South African public service employees: Influence of socio-demographics
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ingrid Potgieter --- , South Africa Kelebogile Mathonsi --- , South AfricaThis study examined the influence of socio-demographics on the relationship between employee organisational trust and organisational commitment. The study’s participants were 255 South African public service employees (female = 58%; black = 82%; permanently employed = 84%), between the ages... -
South African female sex workers’ interactions with law enforcement: An exploratory study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Molefi Motsoeneng --- , South AfricaThis study explored the lived experiences of female sex workers (FSWs) when interacting with the police while conducting their business activities. The informants were 10 FSWs, aged 25 to 30 years, who conducted their business in the busy streets of... -
“I’m angry with my mother”: Lived psychosocial experiences of adolescents with peri-natal-acquired HIV in Limpopo, South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ngwashesenge Francinah Malungani --- , South Africa Melitah Molatelo Rasweswe --- , South Africa Mmapheko Doriccah Peu --- , South AfricaThis study explored psychosocial need experiences of South African adolescents with perinatal-acquired HIV. Using a descriptive phenomenological approach, we interviewed a convenience sample of 20 adolescents living with perinatal-acquired HIV on their psychosocial survivorship experiences (female =10, male =10; age... -
iPrevent: Engaging youth as long-acting HIV prevention product co-researchers in Cape Town, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Miriam Hartmann --- , USA Alexandra M Minnis --- , USA Emily Krogstad --- , USA Sheily Ndwayana --- , South Africa Siyaxolisa Sindelo --- , South Africa Millicent Atujuna --- , South Africa Shannon O’Rourke --- , USA Linda-Gail Bekker --- , South Africa Elizabeth T Montgomery --- , USASouth African youth are one of the highest risk groups, globally, for HIV acquisition. Identifying prevention methods that will be acceptable and used consistently is an urgent priority. Engaging youth as co-designers is a targeted strategy to achieve the goal... -
African Journal of Herpetology: Bibliography and taxonomic discoveries of the past ten years
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jens Reissig --- Ultimate Creatures, South AfricaDuring the past ten years, the African Journal of Herpetology has published various papers regarding African Herpetology from all corners of the African continent. The journal is published twice per annum with an average of six articles per issue. Below... -
A can of worms: Identification issues and morphological conservatism in a large sample of African Green and Bush Snakes (Colubridae: Philothamnus) from Minziro Forest, Tanzania
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Tejs Gørgens Nielsen --- Globe Institute, University of Copenhagen, Denmark Sofie Holdflod Nielsen --- Globe Institute, University of Copenhagen, Denmark Peter Gravlund --- Museum of Eastern Zealand, Denmark David Moyer --- The Field Museum, Illinois, USA and Iringa Anders Galatius --- Aarhus University, Denmark Morten E Allentoft --- Globe Institute, University of Copenhagen, DenmarkThe African green snakes of the genus Philothamnus include c. 21 recognised species distributed across sub-Saharan Africa. Many of the species exhibit high morphological conservatism, exist sympatrically, and can have high population densities. This is presumably the reason why the... -
The virtual field trip: conditions of access/ibility and configurations of care in teaching ethnography (during Covid-19)
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Yusra Price --- , South Africa Elthéa S. de Ruiters --- , South AfricaOnline learning as an emergency response to the Covid-19 pandemic provides a set of challenges that all educators had to navigate in their approach to teaching. This article details our experiences, as young educators, with developing a remote version of... -
Fieldworker reflections on using telephone voice calls to conduct fieldwork amidst the Covid-19 pandemic
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Motsaathebe Serekoane --- , South Africa Lochner Marais --- , South Africa Michael Pienaar --- , South Africa Carla Sharp --- , South Africa Jan Cloete --- , South Africa Liezel Blomerus --- , South AfricaThe declaration of Covid-19 as a global pandemic on 11 March, 2020, and the disaster management regulations implemented in reply to it had enormous ramifications on ethnographic fieldwork. This situation presented an opportunity to reconsider the methodology used in a... -
Educational failure as a potential opening to real teaching – The case of teaching unaccompanied minors in Norway
Item type: Journal Article • Journal: Indo-Pacific Journal of Phenomenology • Authors: Wills Kalisha --- , Norway Tone Saevi --- , NorwayThis article explores the complexity of classroom interaction between teachers and unaccompanied teenagers seeking asylum in Norway. These teenagers find themselves within legal and political ‘grey areas’ where educational goals specific to their extreme situations are unavailable to them, and... -
Beach profiling and ghost crab densities on a hawksbill turtle nesting beach in the Seychelles
Item type: Journal Article • Journal: African Zoology • Authors: Julie A Gane --- , South Africa Colleen T Downs --- , South Africa Benjamin Harris --- , South Africa Mark Brown --- , South AfricaIncreasing beach sediment loss from erosion and high levels of crab Ocypode spp. predation are threatening turtle nests and nesting habitat. The 900 m long beach on Cousine Island, Seychelles, supports a nesting population of approximately 70–130 hawksbill turtle Eretmochelys... -
New distributional data and genetic variation of Panaspis breviceps (Squamata: Scincidae) indicate a biogeographic connection across the Congo Basin
Item type: Journal Article • Journal: African Zoology • Authors: Albert L Lokasola --- , Democratic Republic of the Congo Cédric Botshuna Lotana --- , Democratic Republic of the Congo Guy-Crispin Gembu Tungaluna --- , Democratic Republic of the Congo Benjamin Dudu Akaibe --- , Democratic Republic of the Congo Miloslav Jirků --- , Czech Republic Václav Gvoždík --- , Czech RepublicIn the central Congolian lowland forests we discovered for the first time Panaspis breviceps, a rarely found scincid lizard from the Central African riparian forests. Given that the Central African forests exhibit heterogeneity in the distribution of environmental characteristics and... -
An acoustic survey of beaked whale distribution at São Tomé and Príncipe, Gulf of Guinea, using an unmanned surface vessel
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Pierpoint --- , United Kingdom E Oliver --- , United Kingdom L Scala --- , United Kingdom D Hedgeland --- , United KingdomThe first records of beaked whales, including Cuvier’s beaked whale Ziphius cavirostris, are reported from an acoustic baseline survey in the territorial waters of the Democratic Republic of São Tomé and Príncipe, Gulf of Guinea, West Africa. The survey was... -
Is the largest African penguin colony in South Africa influencing local ocean productivity?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Passuni --- , South Africa LRD Human --- , South Africa SN Riddick --- , United States P Pattrick --- , South Africa M Bizani --- , South Africa SHP Deyzel --- , South Africa NA Strydom --- , South Africa TG Bornman --- , South Africa L Pichegru --- , South AfricaIn coastal waters, nutrient supplies originate principally from allochthonous sources, such as inputs from rivers, estuaries or oceanic waters. Recently, it has been suggested that marine life contributes to the nutrient load, with penguin colonies being the largest contributor worldwide... -
Temporal and spatial variation of the molluscan community structure in Oualidia Lagoon, Moroccan Atlantic coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F El Asri --- , Morocco A Errhif --- , Morocco MN Tamsouri --- , Morocco H Nhhala --- , Morocco M Maanan --- , France H Zidane --- , MoroccoThe molluscan assemblages inhabiting the coastal waters of Oualidia Lagoon, Morocco, were studied during winter and summer of 2013. The taxonomic composition and diversity were determined at 43 sample sites. Thirty-four mollusc taxa were recorded in total, including 12 species... -
Trends in ethylene management strategies: towards mitigating postharvest losses along the South African value chain of fresh produce – a review
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Bongolwethu P Mabusela --- , South Africa Zinash A Belay --- , South Africa Buntu Godongwana --- , South Africa Namrata Pathak --- , Germany Pramod V Mahajan --- , Germany Patricia M K Mathabe --- , South Africa Oluwafemi J Caleb --- , South AfricaThe management of ethylene during postharvest storage is of critical importance to fresh produce wholesalers and retailers. The management of ethylene is an important determinant of the quality and shelf life of fresh fruit and vegetables. Ethylene blocking action and... -
Effects of tropical rainforest fragmentation on bird species: a case study from the Bemanevika Protected Area, northwestern Madagascar
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Armand Benjara --- , Madagascar Lily-Arison Rene de Roland --- , Madagascar Marius Rakotondratsima --- , Madagascar Russell Thorstrom --- , United StatesThe effects of forest fragmentation on forest bird species in the Bemanevika Protected Area (PA), northwestern Madagascar, were investigated during two breeding seasons from October 2016 to January 2018. The forest of Bemanevika is composed of large patches of fragmented... -
Tracing the distribution of natural enemies of non-native invasive eucalypt insect pests in sub-Saharan Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Mesfin Wondafrash --- , South Africa Bernard Slippers --- , South Africa Birhane A Asfaw --- , Ethiopia Idea A Makowe --- , South Africa Herbert Jenya --- , Malawi Samantha Bush --- , South Africa Isaac Kayumba --- , Rwanda Alphonsine Nambazimana --- , Rwanda Simon van der Lingen --- , Zimbabwe Brett P Hurley --- , South AfricaEucalypt forestry in sub-Saharan Africa is challenged by non-native eucalypt-feeding insects. In recent studies, six invasive eucalypt insect pests, namely Blastopsylla occidentalis, Glycaspis brimblecombei, Gonipterus sp.n.2, Leptocybe invasa, Thaumastocoris peregrinus and Ophelimus maskelli were confirmed present in sub-Saharan Africa. We... -
Understanding ICT adoption amongst SMEs in Uganda: Towards a participatory design model to enhance technology diffusion
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Stephen Kyakulumbye --- , South Africa Shaun Pather --- , South AfricaPolicy statements by the United Nations, the African Union and most African countries boldly pronounce on the anticipated benefits of the internetworked world and associated ICT to society in general and to the world of business specifically. In terms of... -
Artificial light improves productivity of mini-cuttings in a clonal minigarden of Eucalyptus benthamii and E. dunnii
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Enéas Ricardo Konzen --- , Brazil Natália Saudade de Aguiar --- , Brazil Marcio Carlos Navroski --- , Brazil Clenilso Sehnen Mota --- , Brazil Leticia Miranda --- , Brazil Regiane Abjaud Estopa --- , Brazil Erasmo Luis Tonett --- , Brazil Mariane de Oliveira Pereira --- , BrazilEucalypts are economically important worldwide, being largely propagated by clonal means, that is, frequently achieved by mini-cuttings. Regional climatic conditions, however, interfere with this strategy. Southern Brazil, especially in higher altitudes, has a considerable number of cloudy and cold days... -
Woody cover change in relation to fire history and land-use in the savanna-woodlands of north-east Namibia (1996–2019)
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Glynis Humphrey --- , South Africa Conor Eastment --- , South Africa Lindsey Gillson --- , South Africa M Timm Hoffman --- , South AfricaVegetation cover estimates for trees, shrub-grass mosaics, and grassland and bare ground, were quantified in the savanna-woodland of Bwabwata National Park, north-east Namibia. Changes in woody cover were analysed using repeat photographs in combination with aerial photographs and recent satellite... -
Convergence and vicariance: speciation of chameleons in the Cape Fold Mountains, South Africa, and the description of three new species of Bradypodion Fitzinger, 1843
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Krystal A Tolley --- South African National Biodiversity Institute, South Africa Colin R Tilbury --- University of Stellenbosch, South Africa Marius Burger --- North-West University, South AfricaThe mechanisms that underpin ecological speciation, morphological convergence and the evolution of ecological morphotypes (ecomorphs) in squamates have allowed for a better appreciation of the speciation process in chameleons. In particular, attention has been drawn to several populations of chameleons... -
Shedding light on a threatened midwife toad: fine-scale niche modelling of the Moroccan endemic Alytes maurus (Pasteur and Bons 1962)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: David Donaire-Barroso --- , Spain Axel Hernandez --- University Pasquale Paoli of Corsica, France Daniel Escoriza --- Institut de Ecologia Aquàtica, Facultat de Ciències, SpainAlytes maurus is one of the lesser-known amphibians of northwestern Africa. This small toad appears in several fragmented subpopulations in the mountainous systems of northern Morocco and it is threatened by deforestation and the pollution of streams. In this study,... -
Self-control mediation on the relationship between personal growth initiative and smartphone addiction among Chinese university students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Yongguang Chen --- , China Yungui Guo --- , ChinaWe examined the role of self-control in the relationship between personal growth initiative and smartphone addiction among university students. A convenience sample of 783 Chinese students (female = 75.7%; mean age = 20.34 years, SD = 1.44 years) completed measures... -
The potential effect of pre-exposure prophylaxis (PrEP) roll-out on sexual-risk behaviour among adolescents and young people in East and southern Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Andrew Sentoogo Ssemata --- , Uganda Richard Muhumuza --- , Uganda Lynda Stranix-Chibanda --- , Zimbabwe Teacler Nematadzira --- , Zimbabwe Nadia Ahmed --- , South Africa Stefanie Hornschuh --- , South Africa Janan Janine Dietrich --- , South Africa Gugulethu Tshabalala --- , South Africa Millicent Atujuna --- , South Africa Denis Ndekezi --- , Uganda Phiona Nalubega --- , Uganda Esther Awino --- , Uganda Helen A Weiss --- , United Kingdom Julie Fox --- , United Kingdom Janet Seeley --- , UgandaPre-exposure prophylaxis (PrEP) is an HIV-prevention strategy recommended for those at high-risk of infection, including adolescents and young people (AYP). We explored how PrEP roll-out could influence sexual risk behaviour among AYP in East and southern Africa. Twenty-four group discussions... -
The ecology of coastal wetland ponds created by diamond mining in southern Namibia. 1. Physical conditions
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Maritz --- , South Africa D Pillay --- , South Africa GM Branch --- , South AfricaCoastal diamond mining in southern Namibia involves constructing seawalls to hold the sea at bay, and seaward accretion of the shoreline by up to 800 m opens what was previously the surf zone for excavation and extraction of bedrock alluvial... -
Assessing mobile phone use in farming: The case of Nigerian rural farmers
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chioma Anadozie --- , Nigeria Mathias Fonkam --- , Nigeria Jean-Paul Cleron --- , NigeriaMost existing literature in the field of mobile phones for agriculture and rural development adopted an economic stance that focused mainly on agriculture marketing and pricing. Little attention has been given to other areas of the farming value chain. To... -
Macroinvertebrate community structure and diversity in relation to environmental factors in wetlands of the lower Gilgel Abay River catchment, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet --- , Ethiopia Seyoum Mengistou --- , Ethiopia Bikila Warkineh --- , EthiopiaThe influence of environmental factors on the diversity of macroinvertebrates was studied in the wetlands of the Gilgel Abay River (GAR) catchment in Ethiopia. The study was done between September 2017 and March 2018, encompassing both wet and dry seasons... -
The effect of rainbow trout (Oncorhynchus mykiss) invasions on native fish communities in the subtropical Blyde River, Mpumalanga province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Lerato T Maimela --- , South Africa Christian T Chimimba --- , South Africa Tsungai A Zengeya --- , South AfricaThis study investigated the effects of rainbow trout (Oncorhynchus mykiss) invasion on native fish communities in the upper Blyde River catchment. A fish survey was undertaken between September 2017 and October 2018 from 11 sites in the Blyde and Treur... -
Problematic smartphone use among adults: Exploratory measure development and validation in Saudi Arabia
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Abdulrahman Al-Mohaimeed --- , Saudi Arabia Mansour Alharbi --- , Saudi Arabia Farid Midhet Mahmood --- , Pakistan Ilias Mahmud --- , Saudi ArabiaThis study aimed to develop and validate a scale to measure problematic smartphone use. Respondents were 708 adults (female = 54.1%, mean age = 25.1 years, SD = 8.5 years) who were randomly recruited for a cross-sectional survey. We purposively... -
A psychobiography of Oliver Reginald Tambo from an African psychology perspective
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sunitha Swanepoel --- , South Africa Paul J. P. Fouché --- , South Africa Pravani Naidoo --- , South AfricaThe objective of this study was to psychologically reconstruct the life of Oliver Reginald Tambo (1917-1993), using integrated African-centred psychological approaches. The researchers applied a constructivist, single-case psychobiographical approach and Alexander’s (1988) principal identifiers of salience to analyse primary and... -
Socio-demographic characteristics as predictors of psychosocial resources of call centre agents
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Nisha Harry --- , South AfricaThis study investigated the socio-demographic predictors of psychosocial resources in call centre agents. A non-probability sample of 409 call centre agents from Nigeria (n = 145, female = 63%, male = 37%) and South Africa (n = 264, female =... -
Polysubstance use among national samples of in-school adolescents in Dominican Republic, Jamaica, and Trinidad and Tobago
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- , South Africa Supa Pengpid --- , ThailandThis study aimed to provide estimates on current polysubstance use among adolescents in three Caribbean countries. Cross-sectional and national school health survey data (2016-2017) were analysed from 6 269 adolescents (median age = 15 years) in Dominican Republic (n =... -
The spatial ecology of black-backed jackals (Canis mesomelas) in a protected mountainous grassland area
Item type: Journal Article • Journal: African Zoology • Authors: Alexander Edward Botha --- , South Africa Angela Caren Bruns --- , South Africa Aliza le Roux --- , South AfricaAn animal’s ability to traverse a landscape and utilise available resources is vital for its survival. The movement patterns of an animal provide insight into space use, activity patterns and ecological requirements that are imperative for successful farming and wildlife... -
Time of permanence and rooting quality of minicuttings of eucalypt clones
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Glauce Taís de Oliveira Sousa Azevedo --- , Brazil Anderson Marcos de Souza --- , Brazil Gileno Brito de Azevedo --- , Brazil Paulo Eduardo Teodoro --- , Brazil Larissa Pereira Ribeiro Teodoro --- , Brazil José Raimundo Luduvico de Sousa --- , BrazilEstablishing the optimal time for rooting permanence and evaluation of the rooting quality of eucalypt clones allows us to optimise the production process and increase the quality of the seedlings produced. This study aimed to determine the optimal time for... -
Identification of the landscape and bioclimatic characteristics that contribute to maintaining the allopatric distribution ranges of the Northern Black Korhaan Afrotis afraoides and the Southern Black Korhaan Afrotis afra
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Steven W Evans --- , South AfricaThe Northern Black Korhaan Afrotis afraoides and the Southern Black Korhaan Afrotis afra were previously considered conspecific, but were subsequently separated based on habitat, plumage, displays and vocalisations of the males and genetic differences. The Northern Black Korhaan is endemic... -
‘Finishing that plate of food …’ The role of the nurse caring for the patient with dysphagia
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Jaishika Seedat --- , South Africa Nikki Strime --- , South Africa -
Breakfast and lunchboxes provided to foundation phase learners: do caregivers’ knowledge and attitude reflect their practices?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Thea Hansen --- , South Africa Elmine du Toit --- , South Africa Cornel van Rooyen --- , South Africa Ronette Lategan-Potgieter --- , United States -
Do lifestyle choices influence the development of overweight and obesity in the South African Air Force, Bloemfontein?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Carina Haasbroek --- , South Africa Ronette Lategan-Potgieter --- , United States Cornel van Rooyen --- , South Africa Marizeth Jordaan --- , South Africa -
The case of Lovina, Bali: how dolphin-watching procedures put village hospitality revenue at risk
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Rodney Westerlaken --- , the Netherlands I Gede Hendrawan --- , Indonesia Luh Putu Eswaryanti Kusuma Yuni --- , IndonesiaThis article focuses on the current practice of dolphin watching in Lovina, Bali. The current approach, in which tourists can hire a traditional boat with a captain, has been evaluated. The results show that the anthropogenic disturbance caused by dolphin... -
Development and validation of an operational multi-layered model for estimation of soil moisture at point-scale in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L Myeni --- , South Africa ME Moeletsi --- , South Africa AD Clulow --- , South AfricaData discontinuity is the major challenge that hinders the integrity of datasets from the sparse soil moisture monitoring networks in developing countries. In this study, a simplified, multi-layered soil water balance model to estimate daily soil moisture at point-scale from... -
Rainfall-driven nutrient loading affects coastal phytoplankton in the southwestern Indian Ocean: a lagoon at Mauritius Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Soondur --- , Republic of Mauritius R Boojhawon --- , Republic of Mauritius R Lowe --- , Australia D Kaullysing --- , Republic of Mauritius BE Casareto --- , Japan Y Suzuki --- , Japan R Bhagooli --- , Republic of MauritiusThis study aimed to test the effects of rainfall-driven nutrient loading on the microphytoplankton dynamics in the shallow water at Trou aux Biches lagoon on the northwest coast of Mauritius. Changes in density, diversity and estimated productivity of microphytoplankton were... -
Fear at the top: killer whale predation drives white shark absence at South Africa’s largest aggregation site
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AV Towner --- , South Africa RGA Watson --- , South Africa AA Kock --- , South Africa Y Papastamatiou --- , United States M Sturup --- , South Africa E Gennari --- , South Africa K Baker --- , South Africa T Booth --- , South Africa M Dicken --- , South Africa W Chivell --- , South Africa S Elwen --- , South Africa T Kaschke --- , South Africa D Edwards --- , South Africa MJ Smale --- , South AfricaRisk-induced fear effects exerted by top predators are pervasive in terrestrial and marine systems, with lasting impacts on ecosystem structure and function. The loss of top predators can disrupt ecosystems and trigger trophic cascades, but the introduction of novel apex... -
Variation of the relationships between lengths and weights applied to 123 fish species observed at Réunion Island (Indian Ocean)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Roos --- , Réunion J Taconet --- , Réunion C Gentil --- , Réunion B Brisset --- , Réunion H Evano --- , Réunion Y Aumond --- , Réunion J Huet --- , Réunion C Lepetit --- , Réunion R Boymond-Morales --- , Réunion T Rungassamy --- , Réunion R Elleboode --- , France K Mahé --- , FranceBody length–weight (L–W) relationships of 123 fish species (122 Actinopterygii and 1 Elasmobranchii) were studied from 10 218 individuals caught around Réunion Island from 2000 to 2021. All species, except for 4 with a very small number of individuals and... -
Supporting marine spatial planning with an ecosystem model of Algoa Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Ortega-Cisneros --- , South Africa E Weigum --- , South Africa R Chalmers --- , South Africa S Grusd --- , South Africa AT Lombard --- , South Africa L Shannon --- , South AfricaThe Ecopath with Ecosim (EwE) modelling framework was used to develop a model of Algoa Bay and test the ecosystem impacts of the implementation of the Addo Elephant National Park Marine Protected Area (MPA). The Ecopath model included 37 functional... -
Spectral classification, mapping and physical habitat implications of a riparian invasion by Tamarix ramosissima Ledeb. in the Touws River, Klein Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MC Grenfell --- , South Africa TI Dube --- , South AfricaThis paper investigates the invasion of a reach of the Touws River by the deciduous alien tree Tamarix ramosissima Ledeb. (Pink Tamarisk, Saltcedar). The objectives of the paper were to investigate the utility of a delta-normalised difference vegetation index (dNDVI)... -
Spatial distribution of zooplankton in relation to some selected physicochemical water quality parameters of Lake Hawassa, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Getacher Beyene --- , Ethiopia Demeke Kifle --- , Ethiopia Tadesse Fetahi --- , EthiopiaWhile scientific information on spatial variation of freshwater zooplankton is relevant to limnological studies, little information is available from the Ethiopian Rift Valley lake: Lake Hawassa. This study aimed at understanding the spatial distribution of the dominant zooplankton taxa in... -
Ecological quality of the Alibori River, northern Benin, using macroinvertebrate indicators
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TM Agblonon Houelome --- , Benin TP Agbohessi --- , Benin D Adandedjan --- , Benin R Nechifor --- , Romania A Chikou --- , Benin IM Lazar --- , Romania P Laleye --- , BeninThe Alibori River, which flows through Benin’s cotton crop regions, receives surface water from much of the cultivated land that is situated along its banks. Chemical pollution in surface runoff from this land use threatens the ecological quality of the... -
A human rights-based approach to coercive public health interventions: lessons from the HIV and COVID-19 pandemics
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Petronell Kruger --- University of Witwatersrand, South Africa Safura Abdool Karim --- , South AfricaThe SARS-CoV-2 outbreak and its impact on countries across the globe has been unprecedented. The lack of pharmaceutical interventions to prevent or treat infection have left States with limited avenues to control the spread of the virus. Many countries have... -
Utilisation of HIV services by female sex workers in Zimbabwe during the COVID-19 pandemic: a descriptive phenomenological study
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Idah Moyo --- , Zimbabwe Livhuwani Tshivhase --- Sefako Makgatho Health Sciences University, South Africa Azwihangwisi Helen Mavhandu-Mudzusi --- University of South Africa,This study focuses on female sex workers as a key population group that suffers a degree of vulnerability according to the World Health Organisation (WHO). Key populations refer to people at heightened risk of contracting the human immunodeficiency virus (HIV)... -
Factors affecting commercialisation of vegetables by central Vietnamese smallholders
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Hung Gia Hoang --- , VietnamIn order to promote smallholders to adopt the commercial farming of crops, it is important to understand the factors that affect their decisions to commercialize. However, little empirical research has looked at what has shaped smallholders’ decisions to adopt commercial... -
Abundance and distribution of plant-parasitic nematodes in tomatoes grown in a semi-arid agro-ecological zone in Tanzania
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Liberatus D Lyimo --- , Tanzania Jackline A Bakengesa --- , Tanzania Janeth D Mbuma --- , TanzaniaThe abundance and distribution of plant-parasitic nematodes (PPN) on tomato plants grown in nine villages in the semi-arid zones of Singida and Dodoma in Tanzania were assessed in December 2020. Samples from soil and plant roots were evaluated for abundance,... -
Host specificity of the Pygmy Falcon Polihierax semitorquatus: a review
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: H Dieter Oschadleus --- , South AfricaThe Pygmy Falcon Polihierax semitorquatus does not build its own nest but is an obligate user of the nests of colonial birds for roosting and breeding. The nests of various weavers and starlings have been listed, suggesting a wide range... -
The influence of nest location and the effect of predator removal on Cape Gannet Morus capensis egg predation by Kelp Gulls Larus dominicanus vetula
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Zanri Strydom --- , South Africa Lauren J Waller --- , South Africa Mark Brown --- , Hervé Fritz --- , South Africa Jan A Venter --- , South AfricaThe breeding range of the Cape Gannet Morus capensis currently extends to six of the ten islands formerly utilised by this species. The Cape Gannet is classified as an endangered species with a rapidly declining population. Since the mid-1950s, the... -
Assessment of long-term protection on the aboveground biomass and organic carbon content using two non-destructive techniques: case of the Sidi Toui National Park in southern Tunisia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Roukaya Chibani --- , Tunisia Abderrazak Tlili --- , Tunisia Farah Ben Salem --- , Tunisia Mounir Louhaichi --- , Tunisia Azaiez Ouled Belgacem --- , Saudi Arabia Mohamed Neffati --- , TunisiaLong-term protection of arid ecosystems changes the vegetation and soil structures. The quantification of aboveground biomass and carbon content are among the principal indicators to evaluate these changes. Most methods used to quantify these parameters are costly, time consuming and... -
An Android-based mobile platform for understanding Residential PV system sizing
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Iheanacho Henry Denwigwe --- University of Lagos, Nigeria Joseph Dare Akinde-Peters --- University of Lagos, Nigeria Olubayo Moses Babatunde --- University of Lagos, Nigeria Oluwaseye Samson Adedoja --- Kogi State University Campus, Nigeria Ibrahim Abiola Taiwo --- Bournemouth University, UK Toyosi Beatrice Adedoja --- Cooperative Information Network (COPINE), NASRDA, OAU Campus, NigeriaThis research study presents the design of a mobile Android application which provides efficient PV sizing recommendations for residential users. The paper aims to promote the adoption of solar energy to meet energy demands for residential use, by providing accurate... -
“I didn’t support PrEP because I didn’t know what it was”: Inadequate information undermines male partner support for young women’s pre-exposure prophylaxis use in western Kenya
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Kawango Agot --- , Kenya Miriam Hartmann --- , USA Sophie Otticha --- , Kenya Alexandra Minnis --- , USA Jacob Onyango --- , Kenya Marylyn Ochillo --- , Kenya Sarah T Roberts --- , USAThe HIV infection rate is higher among adolescent girls and young women (AGYW) in Africa than men in the same age range. Pre-exposure prophylaxis (PrEP) can be used by women discreetly; however, for most AGYW, male partner approval is desired... -
Density effect on growth variables of eucalypt clones in a Nelder wheel experiment
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Franciele Alba da Silva --- , Brazil Sylvio Péllico Netto --- , Brazil Alexandre Behling --- , Brazil Henrique Soares Koehler --- , Brazil Ataídes Marinheski Filho --- , Brazil Cláudio Cerqueira --- , BrazilNelder’s systematic design enables studies of tree plantation spacing in relatively small areas, which is of great interest for forest planning. However, dependence between observations can arise with this method, making it difficult to use classic statistics for evaluating an... -
Nematode community structure and distribution along the Kenyan continental shelf
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SM Hashim --- University of Nairobi, Kenya AWN Muthumbi --- University of Nairobi, Kenya JM Githaiga --- University of Nairobi, Kenya J Okondo --- Kenya Marine and Fisheries Research Institute (KMFRI), KenyaMeiofauna communities were analysed from samples collected at four stations on the Kenyan continental shelf (Shimoni, Kwale, Mombasa and Kilifi) during the maiden cruise of the RV Mtafiti, 12–21 December 2015. Nematodes were identified to genus level, and their distribution... -
On the identity of west Saharan geckos of the Tarentola ephippiata complex (Squamata: Phyllodactylidae), with comments on an extreme case of syntopy with their close relative T. annularis
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Thore Koppetsch --- Zoologisches Forschungsmuseum Alexander Koenig, Germany Wolfgang Böhme --- Zoologisches Forschungsmuseum Alexander Koenig, GermanyTarentola geckos have a widespread geographic distribution and occur both in the Palearctic and Afrotropical realms, as well as the Neotropical region. Particularly, across North Africa phenotypically similar and cryptic species can be found, like the west Saharan members of... -
Digging adaptations evolved independently in two lineages of Psammophiid snake: evidence from cranial morphology
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Nick Sekits --- Whitman College, United States Walter Tunnell-Wilson --- Whitman College, United States Kate Jackson --- Whitman College, United StatesThe Beaked Snakes (Rhamphiophis) are semi-fossorial snakes with reinforced snouts adapted for digging. The Skaapstekers (Psammophylax) are generalist terrestrial snakes. Both belong to the family, Psammophiidae. The Striped Beaked Snake (Kladirostratus acutus) was originally assigned to the genus Rhamphiophis, because... -
Space, Time and the Ethics of Graphic Wit(h)nessing: Rupert Bazambanza’s Smile through the Tears
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Nick Mdika Tembo --- , South AfricaThis article proposes a reading, through the lens of Bracha Ettinger’s theoretical notion of ‘wit(h)nessing,’ of Rupert Bazambanza’s Smile through the Tears as a graphic memoir that draws on the Rwandan historical archive to bear witness to the trauma of... -
A protocol and tools for setting environmental water temperature guidelines for perennial rivers in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Helen Dallas --- , South Africa Nicholas Rivers-Moore --- , South AfricaHuman activities have cumulatively altered natural thermal regimes, with impacts and occurrences of extreme events amplified and exacerbated by global climate change. This leads to cascading ecological impacts in river systems. This paper translates knowledge generated over more than ten... -
Machine learning approach for identifying suspicious uniform resource locators (URLs) on Reddit social network
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nureni Ayofe Azeez --- , Nigeria Ahmed Oladapo Lawal --- , Nigeria Sanjay Misra --- , Norway Jonathan Oluranti --- , NigeriaThe applications and advantages of the Internet for real-time information sharing can never be over-emphasized. These great benefits are too numerous to mention but they are being seriously hampered and made vulnerable due to phishing that is ravaging cyberspace. This... -
Influence of cropping sequences on labile carbon and phosphorus fractions in a wheat-based conservation agriculture system
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: NZ Sosibo --- , South Africa E Dube --- , South Africa P Muchaonyerwa --- , South Africa TJ Tsilo --- , South AfricaWhile conservation agriculture (CA) has largely been successful in many areas, some reports suggest that certain farmers have not realised the benefits they had hoped for, especially in Africa. The benefits of CA could depend on the cropping sequences involved... -
Genetic and morphological variation of Woodland Kingfisher Halcyon senegalensis reveals cryptic mitochondrial lineages and patterns of mitochondrial–nuclear discordance
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Monica Mwale --- South African National Biodiversity Institute (SANBI), South Africa Desiré L Dalton --- South African National Biodiversity Institute (SANBI), South Africa Anna S Kropff --- South African National Biodiversity Institute (SANBI), South Africa Kim Labuschagne --- South African National Biodiversity Institute (SANBI), South Africa Isa-Rita Russo --- Cardiff University, United Kingdom Samuel T Osinubi --- University of Cape Town, South AfricaThe Woodland Kingfisher Halcyon senegalensis is widely distributed throughout sub-Saharan Africa and occupies a wide variety of woodland and savannah habitat. Thus far, three subspecies have been described based on morphological variation. In the present study, using western, eastern and... -
Cinereous Vulture Aegypius monachus movements between Europe and Africa show a pattern across the Strait of Gibraltar
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Juan Ramírez --- Malaga University, Spain Javier Elorriaga --- , Spain Andrés de la Cruz --- Spanish Institute of Oceanography (IEO), Spanish National Research Council (CSIC), SpainThe biology of the Cinereous Vulture Aegypius monachus is well known across its breeding range, and the species’ dispersal and movements throughout Europe are widely recorded. However, the ecology of this vulture south of the Mediterranean Sea has been overlooked,... -
A comparison of migrant and resident bird population changes in South Africa using citizen science data: trends in relation to Northern Hemisphere distribution
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Alan TK Lee --- University of KwaZulu-Natal, South Africa Sophie AJ Hammer --- , United KingdomMany species of migratory birds have been declining on the Palearctic-African flyways in recent decades due to human population pressure and land-use intensification. Models predict that the declining trends of migratory birds will continue into the foreseeable future across much... -
Flow alterations and nutrient loading reduce primary producer variability in a temporarily closed microtidal estuary in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Monique Nunes --- , South Africa Daniel A Lemley --- , South Africa Janine B Adams --- , South AfricaPrimary producer responses to cumulative regulating factors were investigated in a temporarily closed microtidal estuary. We hypothesised that the phytoplankton chlorophyll-a concentration (Chl a) and invasive alien aquatic plant (IAAP) abundance would be highest during the low-flow season and that... -
Drivers of change in vegetation and soil in the Gamka Karoo: grazing versus rainfall
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: N Saayman --- , South Africa CD Morris --- , South Africa R Swart --- , South Africa JC Botha --- , South AfricaThe Gamka Karoo is a low-lying vegetation type in the semi-arid Nama Karoo in the south-western part of South Africa with extensive rangelands used for livestock ranching and wildlife. Although the Nama Karoo is generally resilient to grazing and most... -
Universal lines in graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Juan Alberto Rodríguez-Velázquez --- Universitat Rovira i Virgili, SpainIn a metric space M = (X, d), a line induced by two distinct points x, x′ ∈ X, denoted by , is the set of points given by -
Effect of simplified dietary advice on nutritional status and uremic toxins in chronic kidney disease participants
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Zarina Ebrahim --- Stellenbosch University, South Africa Griet Glorieux --- Ghent University Hospital, Belgium M Rafique Moosa --- Stellenbosch University, South Africa Renée Blaauw --- Stellenbosch University, South Africa -
Seed powder extract of physic nut (Jatropha curcas) as a biopesticide for weevils (Callosobruchus maculatus) in stored cowpea (Vigna unguiculata)
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: F. O. Ifeanyieze --- University of Nigeria, Nigeria H. I. Ameh --- University of Nigeria, Nigeria T. E. Ejiofor --- University of Nigeria, Nigeria M. E. Ikehi --- University of Nigeria, Nigeria F. M. Onu --- University of Nigeria, NigeriaThe study explored the effectiveness of physic nut (Jatropha curcas) in the control of cowpea weevils (Callosobruchus maculatus). The repellence, mortality rates and progeny emergence of weevils were observed, as well as germination viability of the treated cowpea seeds. The... -
A Big Data strategy to reinforce self-sustainability for pharmaceutical companies in the digital transformation era: A case study of Egyptian pharmaceutical companies
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mahmoud Elsayed Hassanin --- Ahram Canadian University, Egypt Mohamed Ahmed Hamada --- International IT University, KazakhstanThe Big Data-driven economy has emerged, and data is known as the new petroleum of the current century. Big Data (BD) analytics can play an essential role in building a self-sustainable competitive advantage for the pharmaceutical industry by feeding pharmaceutical... -
Artistic gymnastics mirror teaching approach efficacy for improving interpersonal skills of college students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Zan Zhou --- Shaoxing University, China Haibo Tian --- Shaoxing University, China Siwei Luo --- Shaoxing University, China Yao Wang --- Shaoxing University, China Dan Shi --- Zhejiang Yuexiu University, ChinaThis study aimed at improving the interpersonal skills of college students through an intervention of artistic gymnastics mirror teaching approach. Following a longitudinal study quasi-experimental design, 30 students were randomly assigned to the artistic gymnastics' intervention, and 30 students were... -
Mediating roles of social anxiety and interpersonal distress in the relationship between mobile phone addiction and loneliness
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Taiyong Bi --- Zunyi Medical University, China Hui Kou --- Zunyi Medical University, China Qinhong Xie --- Zunyi Medical University, China Jie Dong --- Zunyi Medical University, ChinaThe present study aimed to explore the relationship between mobile phone addiction and loneliness among college students and the possible mediating roles of social anxiety and interpersonal distress may play in that relationship. A total of 477 Chinese college students... -
Natural recolonisation of sub-Antarctic Marion Island by Common Diving Petrels Pelecanoides urinatrix
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Maëlle Connan --- Marine Apex Predator Research Unit (MAPRU), Institute for Coastal and Marine Research, Nelson Mandela University, South Africa Stefan Schoombie --- Marine Apex Predator Research Unit (MAPRU), Institute for Coastal and Marine Research, Nelson Mandela University, South Africa Janine Schoombie --- FitzPatrick Institute of African Ornithology, DSI-NRF Centre of Excellence, University of Cape Town, South Africa Ben Dilley --- FitzPatrick Institute of African Ornithology, DSI-NRF Centre of Excellence, University of Cape Town, South Africa Peter G Ryan --- FitzPatrick Institute of African Ornithology, DSI-NRF Centre of Excellence, University of Cape Town, South AfricaNocturnal burrow-nesting seabirds are notoriously difficult to study and can go unnoticed for years in remote areas. One of these species is the Common Diving Petrel Pelecanoides urinatrix, which has a circumpolar breeding distribution in the Southern Ocean, including at... -
Impacts and trapping of ambrosia beetles Euwallacea fornicatus and E. similis in Acacia plantations in Vietnam
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tran Xuan Hung --- Vietnamese Academy of Forest Sciences, Vietnam Pham Quang Thu --- Vietnamese Academy of Forest Sciences, Vietnam Nguyen Minh Chi --- Vietnamese Academy of Forest Sciences, Vietnam Le Van Binh --- Vietnamese Academy of Forest Sciences, Vietnam Bernard Dell --- Vietnamese Academy of Forest Sciences, VietnamThere are over two million hectares of Acacia plantations in Vietnam and loss from infestations of ambrosia beetles is of increasing concern. In this study, we first determined the key taxa and the extent of damage, and then identified effective... -
“Armed with faith”: church membership, Pentecostal beliefs and migrant belonging in Harare, Zimbabwe
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Rufaro Hamish Mushonga --- University of Zimbabwe, ZimbabweThis ethnographic study explores how church membership and Pentecostal beliefs afford Nigerian migrant traders living in Harare an opportunity to embed themselves within the spaces of Harare’s Downtown informal settlement, which are characterised by entrenched and heightened forms of exclusion... -
A baseline assessment of coastal pH variability in a temperate South African embayment: implications for biological ocean acidification research
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Edworthy --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa WM Potts --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa S Dupont --- University of Gothenburg, Sweden MI Duncan --- Rhodes University, South Africa TG Bornman --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaCompared with the open ocean, knowledge of pH variability in coastal waters is rudimentary, especially in Africa. This is concerning as quantifying local pH conditions is critical when assessing the response of coastal species to future ocean acidification scenarios. The... -
Testing the efficacy of bat monitoring methods for identification and species surveys in KwaZulu-Natal province, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Alexandra Howard --- University of Pretoria, South Africa Ara Monadjem --- University of Pretoria, South Africa Duncan MacFadyen --- , South Africa Christian T Chimimba --- University of Pretoria, South AfricaMulti-method sampling approaches are becoming increasingly popular for investigating species occurrence at specific sites, as there is a need to accurately monitor species with limited time and resources. In this study, a multi-method comparative approach was used to survey bat... -
Loneliness and mobile phone addiction in Chinese college students: a moderated mediation model
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bin Zhang --- Hunan University of Chinese Medicine, China Hanyu Liang --- Guizhou Medical University, China Yanhong Luo --- Hunan University of Chinese Medicine, China Yu Peng --- Hunan University of Chinese Medicine, China Zhiyan Qiu --- Hunan University of Chinese Medicine, China Huili Mao --- Hunan University of Chinese Medicine, China Mengqi Yuan --- Hunan University of Chinese Medicine, China Sicheng Xiong --- Hunan University of Chinese Medicine, ChinaThis study aimed to investigate (i) the relationship between loneliness and mobile phone addiction; (ii) the mediating role of negative affect in the association between loneliness and mobile phone addiction; and (iii) the moderating effect of perceived stress in the... -
Liming guidelines for soils under wheat cropping in the eastern Free State, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: HJJ van Zyl --- University of the Free State, South Africa CC du Preez --- University of the Free State, South AfricaSoil acidity hampers the sustainability of wheat production in the eastern Free State, South Africa. Specific guidelines for liming are needed by farmers and advisors to ameliorate this condition. In this study, soils from four representative wheat producing farms were... -
Impact of liming on extractable phosphorus, exchangeable base cations, and effective cation exchange capacity of eastern Free State soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: HJJ van Zyl --- University of the Free State, South Africa CC du Preez --- University of the Free State, South AfricaSoil acidity can adversely affect wheat production in the eastern Free State, South Africa. Liming of the soils is therefore essential. The aim of this study was to establish whether extractable phosphorus (P), exchangeable calcium (Ca), magnesium (Mg) and potassium... -
Genotypic variability in nutrient uptake and use efficiency in chickpea grown under low phosphorus availability in a Mediterranean climate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Hanine Loucif --- Université Djilali Bounaama de Khemis Miliana, Algeria Brahim Bousalhih --- Université Djilali Bounaama de Khemis Miliana, Algeria Rebiha Chaoui --- Université Djilali Bounaama de Khemis Miliana, Algeria Jean Jacques Drevon --- Université de Montpellier, France Mohamed Farissi --- Sultan Moulay Slimane University, Morocco Mohamed Lazali --- Université Djilali Bounaama de Khemis Miliana, AlgeriaLow phosphorus (P) availability is a major constraint for chickpea production. Consequently, P-efficient genotypes can improve productivity under conditions where the higher application of P is not economical. This study was conducted to characterise four chickpea genotypes for nutrient uptake... -
Low constant temperature drying can be a satisfactory method to determinethe moisture content of impermeable seed coated species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ganesh K Jaganathan --- University of Shanghai for Science and Technology, China Jiajin Li --- University of Shanghai for Science and Technology, China Baolin Liu --- University of Shanghai for Science and Technology, ChinaThe International Seed Testing Association (ISTA) recommends two methods for seed moisture content determination: high constant temperature drying, carried out at 130 °C for 1, 2, 3 or 4 hours, and low constant temperature drying, carried out at 103 °C... -
Modules whose exact submodules are essentially embedded in summands
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Fıgen Takıl Mutlu --- Eskisehir Technical University, Turkey Adnan Tercan --- Hacettepe University, Turkey Ramazan Yaşar --- Hacettepe University, TurkeyIn this article we study the condition that every exact submodule is essentially embedded in direct summands in a module. It is shown that the class of modules with former property is closed under direct sums. However, we provide examples... -
An analysis of the COVID-19 contact tracing App in South Africa: Challenges experienced by users
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Rene W. Albertus --- University of Cape Town, South Africa Frank Makoza --- Cape Peninsula University of Technology, South AfricaSouth Africa is one of the countries in Africa that has a high COVID-19 virus infection rate. The government of South Africa introduced the COVID Alert SA App, a contact tracing mobile application (App), to reduce the spread of the... -
Digital Jordan curves and surfaces with respect to a graph connectedness
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Josef Šlapal --- Brno University of Technology, Institute of Mathematics, Czech RepublicWe introduce a graph connectedness induced by a given set of paths of the same length. We focus on the 2-adjacency graph on the digital line ℤ with a certain set of paths of length n for every positive integer... -
Translating research into policy: the case of orphans and vulnerable children in South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Olive Shisana --- Human Sciences Research Council, Julia Louw --- University of the Western Cape,Policies are often developed without taking into account social science research findings and recommendations, despite the plethora of such research studies. This is largely because researchers and policy makers often work in isolation, yet if they worked synergistically they could... -
Assistance needed for the integration of orphaned and vulnerable children — views of South African family and community members
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Melvyn Freeman --- Social Aspects of HIV/AIDS and Health Research Programme of the HSRC, Nkululeko Nkomo --- Social Aspects of HIV/AIDS and Health Research Programme of the HSRC,Guardianship within families is often regarded as the most viable and preferred option for orphaned and vulnerable children (OVC). However, this will place a considerably increased burden on the new caregivers of these children. This study examines whether assistance to... -
Experiences of orphan care in Amach, Uganda: assessing policy implications
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Christopher Oleke --- Ministry of Health - Uganda, Astrid Blystad --- University of Bergen, Norway Ole Bjørn Rekdal --- Bergen University College, Karen Marie Moland --- University of Bergen, NorwayUganda is estimated to have around two million orphans constituting approximately 19% of all the children in the country. This paper presents findings from a study on the experiences of orphan care among Langi people of Amach sub-county in Lira... -
HIV/AIDS and family support systems: A situation analysis of people living with HIV/AIDS in Lagos State
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Adeyemi E. Oluwagbemiga --- Lagos State University, NigeriaCurrent statistics about the HIV/AIDS epidemic in Nigeria do not reveal the broader social and economic impacts of the disease on the family. The study therefore primarily aimed to address the socio-economic effects of HIV infection on individuals and their... -
An enumeration of orphans and analysis of the problems and wishes of orphans: the case of Kariba, Zimbabwe
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Jaqualine F Mangoma --- University of Zimbabwe Lake Kariba Research Station, Moses J Chimbari --- University of Botswana's Harry Oppenheimer Okavanga Research Centre, Elmon Dhlomo --- University of Zimbabwe Lake Kariba Research Station,In southern Africa, HIV and AIDS accounts for the largest proportion of orphans. Very often the orphaned children become destitute, and young girls in particular become more vulnerable to HIV and AIDS as they try to fend for the rest... -
Reaching the hearts and minds of illiterate women in the Amhara highland of Ethiopia: Development and pre-testing of oral HIV/AIDS prevention messages
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Gebeyehu W Bogale --- Educational Media Agency, Ethiopia Henk Boer --- University of Twente, The Netherlands Erwin R Seydel --- University of Twente, The NetherlandsIn the style of radio programmes, we developed three episodes of audio HIV prevention education for illiterate women in Ethiopia. We used social-oriented presentation formats, such as discussion between women on HIV prevention, and expert-oriented presentation formats, such as an... -
The quality of material care provided by grandparents for their orphaned grandchildren in the context of HIV/AIDS and poverty: a study of Kopanong municipality, Free State
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Tsiliso Tamasane --- Human and Social Development Research Programmes, Human Sciences Research Council, Judith Head --- Department of Sociology, University of Cape Town,A pervasive argument in the literature on AIDS orphans in South Africa is that grandparents, who often care for their orphaned grandchildren, lack the material means to provide adequate care. This study investigated that claim in an area of ubiquitous... -
Male circumcision and its association with HIV infection and sexually transmitted diseases: evidence from 18 demographic and health surveys in sub-Saharan Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Samson Gebremedhin --- Hawassa University, EthiopiaThe study aimed to assess the association between male circumcision and HIV infection and STDs. The issue is controversial as various studies reported conflicting findings. A cross-sectional comparative study based on the secondary data of 18 Demographic Health Surveys (DHS),... -
Appraisal of the inherent socio-demographic dynamics of HIV/AIDS epidemic in four districts of South-Western Uganda
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: E. Agwu --- Tropical Disease Research Unit, Department of Medical Microbiology & Parasitology, Faculty of Biomedical Sciences, School of Health Sciences, Kampala International University, Western Campus, Republic of Uganda V. Pazos --- Tropical Disease Research Unit, Department of Medical Microbiology & Parasitology, Faculty of Biomedical Sciences, School of Health Sciences, Kampala International University, Western Campus, Republic of Uganda J. C. Ihongbe --- Department of Medical Laboratory Sciences, Faculty of Basic Medical Sciences, College of Medicine, Ambrose Alli University, Nigeria J. Ssengendo --- Social Sciences Research Division, Directorate of Postgraduate Studies and Research, Kampala International University, UgandaAlthough HIV prevalence in Uganda is much lower than it once was, AIDS is still claiming many lives each year with clear signs of escalating rural epidemics. The objective of this study was to appraise the socio-economic and demographic dynamics... -
Peripheral neuropathy and quality of life of adults living with HIV/AIDS in the Rulindo district of Rwanda
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Juvenal Biraguma [d147e18] Anthea RhodaAlthough the life expectancy of people living with HIV/AIDS (PLWH) has increased in the past years, they could experience secondary illness such as peripheral neuropathy (PN). Therefore, they need to adapt to chronic disablement which could affect their quality of... -
The experiences of Batswana families regarding hospice care of AIDS patients in the Bophirima district, North West province, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: M. F. Makhele F. M. Mulaudzi [d121e25]The HIV/AIDS pandemic put significant strain on healthcare services in the country. Hospitals were no longer coping with the escalating number of AIDS patients. This resulted in the early discharge of patients, with some patients, too ill to be nursed... -
LGBT Africa: A social justice movement emerges in the era of HIV
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Chris Beyrer [d151e18]LGBT communities are emerging across Africa in 2012. Many are emerging in the context of the continents severe HIV epidemic. Homophobia is a barrier to social acceptance and to health and other social services, but African communities are showing reliance... -
Sanctuary or double-edged sword? Challenges confronting adolescents living at Nkosi's Haven in Johannesburg, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Nkosiyazi Dube Eleanor Ross [d59e26]Living in an institution associated with HIV and AIDS is likely to exacerbate difficulties experienced by teenagers who have to cope with the normal stresses of adolescence. The aim of the study was to explore the challenges that adolescents living... -
Experiences of sexual relationships of young black women in an atmosphere of coercion
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Frances Clüver [d373e18] Diane Elkonin Charles YoungNegotiations surrounding sexual activity are characterised by multiple power disparities that include race, social status and age, with gender being the most dominant differential in heterosexual interactions. Research has shown that women are physiologically more at risk of contracting HIV... -
The physical activity levels among people living with human immunodeficiency virus/acquired immunodeficiency syndrome receiving high active antiretroviral therapy in Rwanda
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: J.M. Frantz --- , South Africa A. Murenzi --- , South AfricaThe accessibility of high active antiretroviral therapy (HAART) for local human immunodeficiency virus (HIV) patients is improving in Rwanda. It is well known that this therapy is associated with serious adverse effects, such as metabolic and morphologic changes. One of... -
Changes in sexual behaviour and practice and HIV prevalence indicators among young people aged 15–24 years in Zambia: An in-depth analysis of the 2001–2002 and 2007 Zambia Demographic and Health Surveys
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Joshua Kembo --- , South AfricaHIV and AIDS still pose a major public health problem to most countries in sub-Saharan Africa, Zambia included. The objective of the paper is to determine changes in selected sexual behaviour and practice and HIV prevalence indicators between 2001–2002 and... -
TB/HIV risk factors identified from a General Household Survey of South Africa in 2006
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Sathiya Susuman Appunni --- , , South Africa Renette Blignaut --- , , South Africa Siaka Lougue --- , , South AfricaThe level of human immunodeficiency virus (HIV), tuberculosis (TB) as well as the co-infection TB/HIV in South Africa is among the highest in the world. TB is curable while HIV is not, yet the combination of both is a growing... -
The reliability of the modified lower extremity functional scale among adults living with HIV on antiretroviral therapy, in Rwanda, Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: D.K. Tumusiime --- , , Rwanda A. Stewart --- , , South Africa F.W.D. Venter --- , , South Africa E. Musenge --- , , South AfricaPeripheral neuropathy (PN) is common among people living with HIV (PLHIV) on antiretroviral therapy (ART), and affects their daily functional ability and quality of life. Lower extremity functional ability, which is most commonly compromised in patients with PN, has not... -
Talk radio as the soundtrack of our lives: Participatory HIV/AIDS communication, public self-expression and Positive Talk
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Mariekie Burger --- , , South AfricaDespite the many HIV/AIDS communication initiatives, combined with support and infrastructural support in South Africa, risky behaviour associated with the spread of the epidemic is increasing amongst many groups. This calls for a re-evaluation of endeavours aimed at curbing the... -
A case study of school support and the psychological, emotional and behavioural consequences of HIV and AIDS on adolescents
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Olubusayo Aduke Asikhia --- , , South Africa Kesh Mohangi --- , , South AfricaVarious studies have reported a huge increase in the numbers of orphaned adolescents in Sub-Saharan Africa and its effects on their psychological, emotional and behavioural development. Yet, their needs are seldom recognised or adequately addressed in policy and programmes.This article... -
Modelling self-assessed vulnerability to HIV and its associated factors in a HIV-burdened country
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: A. F. Fagbamigbe --- , , South Africa A. M. Lawal --- , , South Africa E. S. Idemudia --- , , South AfricaBackground: Globally, individuals’ self-assessment of vulnerability to HIV infection is important to maintain safer sexual behaviour and reduce risky behaviours. However, determinants of self-perceived risk of HIV infection are not well documented and differ. We assessed the level of self-perceived... -
On the periphery of HIV and AIDS: Reflections on stress as experienced by caregivers in a child residential care facility in South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Kesh Mohangi --- , , South Africa Chereen Pretorius --- , , South AfricaFew researchers have investigated how female caregivers of institutionalised children, especially those affected by HIV and AIDS, experience stress. The role played by caregivers cannot be overemphasised; yet caregivers who work in institutions caring for orphaned and/or abandoned children affected... -
Laughter therapy as an intervention to promote psychological well-being of volunteer community care workers working with HIV-affected families
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Irene Hatzipapas --- , , South Africa Maretha J. Visser --- , , South Africa Estie Janse van Rensburg --- , , South AfricaThe study explores the experiences of volunteer community care workers working with HIV-affected families, participating in laughter therapy. Laughter therapy is being used as an intervention to positively influence individuals experiencing various forms of emotional distress. Community care workers play... -
Health-related quality of life and associated factors in adults living with HIV in Rwanda
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Juvenal Biraguma --- , , Rwanda Eugene Mutimura --- , , Rwanda José M Frantz --- , , South AfricaIn Rwanda, as in other sub-Saharan African (SSA) countries, life expectancy of people living with HIV (PLWH) has increased dramatically as a result of combined antiretroviral therapy (cART). People living with HIV can now live longer but with increasing rates... -
Factors associated with knowledge and awareness of HIV/AIDS among married women in Bangladesh: evidence from a nationally representative survey
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Md. Ashiqul Haque --- , , Bangladesh Md. Sha Newaj Hossain --- , , Bangladesh Muhammad Abdul Baker Chowdhury --- , , USA Md. Jamal Uddin --- , , BangladeshWomen in Bangladesh share a greater risk of Human Immunodeficiency Virus (HIV)/Acquired Immune Deficiency Syndrome (AIDS) infection compared to men. Levels of knowledge and awareness largely contribute to the prevalence of the HIV epidemic and its consequences. So, it is... -
A model to understand HIV-related stigma and the psychosocial well-being of children orphaned by AIDS: a theory generative approach
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Z. Yassin --- University of the Western Cape, South Africa C. Erasmus --- University of the Western Cape, South Africa J. Frantz --- University of the Western Cape, South AfricaHIV-related stigma has negatively impacted the psychosocial well-being of children who have been orphaned by AIDS-related causes. Response to reducing stigma and ensuring child well-being is hindered by the limited understanding of HIV-related stigma and how it affects the psychosocial... -
Diel activity patterns in a captive colony of rinkhals, Hemachatus haemachatus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: GrahamJ. Alexander --- University of the Witwatersrand, South Africa CatherineL. Marshall --- University of the Witwatersrand, South Africa -
Morphological variation and geographical distribution in the South African lizards Typhlosaurus caecus (Cuvier 1817) and Typhlosaurus vermis Boulenger 1887 (Scincidae: Acontinae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: MichaelF. Bates --- , South Africa Neil J.L. Heideman --- , South Africa BrianA. Wilson --- Soghne College of Education, South Africa Martin G.J. Hendricks --- University of the Western Cape, South Africa Nulfa Don --- Soghne College of Education, South Africa Carlos Moses --- Soghne College of Education, South AfricaThe most recent evaluation of morphological variation in Typhlosaurus caecus was based on only six specimens, including one from Port Nolloth here referred to T. vermis. We report on morphological variation in 25 T. caecus and 33 T. vermis from... -
A critically endangered new species of Nectophrynoides (Anura: Bufonidae) from the Kihansi Gorge, Udzungwa Mountains, Tanzania
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: JohnC. Poynton --- , England KimM. Howell --- University of Dar es Salaam, Tanzania BarryT. Clarke --- , England JonC. Lovett --- University of York, EnglandA new species of the Tanzanian ovoviviparous dwarf toad Nectophrynoides is described from the Kihansi River Gorge in the Udzungwa Mountains, and a key to the genus provided. The new species, currently known only from small patches of spray-dependent wetland... -
Two new species of Stephopaedes (Anura: Bufonidae) from Tanzania, with a review of the genus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: JohnC. Poynton --- , U.K. BarryT. Clarke --- , U.K.Two new species of Stephopaedes are described from Mafia Island and the Usambara foothills, castern Tanzania. The four species now recognized in this eastern African forest-associated genus are diagnosed and discussed. Osteological details are included. As with other small-sized African... -
New data on the South African acontine skink Typhlosaurus lomii Haacke 1986 (Squamata: Scincidae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: AaronM. Bauer --- Villanova University, USA Victoria Schneider --- Villanova University, USA Trip Lamb --- East Carolina University, USA PaulE. Moler --- Florida Game and Fresh Water Fish Commission , USA RandallD. Babb --- , USA -
Courtship and mating behaviour in the diadem snake, Spalerosophis diadema cliffordi (Colubridae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: RobertL. Ball --- Panola College, USA NeilB. Ford --- University of Texas at Tyler, USA -
Evolutionary scenarios in the Pachydactylus Group geckos of southern Africa: new hypotheses
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: AaronM. Bauer --- Villanova University,Gekkonid lizards constitute one of the most diverse and highly endemic components of the southern African herpetofauna. Although higher order relationships among African geckos remain obscure, the Pachydactylus Group has been widely accepted as monophyletic. Within this clade many taxa... -
Critical review of a revision of Psammophis (Linnaeus 1758) (Serpentes, Reptilia) by Frank Brandstätter
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Barry Hughes --- ,Publication in book form of an earlier thesis (Brandstätter 1995, 1996) has placed in the public domain what purports to be a thorough revision of what is taxonomically one of the most difficult of snake genera—the primarily African but also... -
Progress and interim results of the Southern African Frog Atlas Project
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: LeslieR. Minter --- University of the North, South Africa Marius Burger --- University of Cape Town, South Africa JamesA. Harrison --- University of Cape Town, South Africa -
Phylogenetic relationships within the Madagascan boophids and mantellids as elucidated by mitochondrial ribosomal genes
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: ChristinaM. Richards --- Wayne State University, USA RonaldA. Nussbaum --- University of Michigan, USA ChristopherJ. Raxworthy --- , USAPrevious work has demonstrated that mitochondrial ribosomal gene sequences are useful for elucidating amphibian phylogenetic relationships at the levels of order, family and genus. Here, we use sequences from these genes somewhat longer than those used in previous studies to... -
Evidence for an Afrotemperate amphibian fauna
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: JohnC. Poynton --- , UKLatitudinal and altitudinal changes in composition of the African amphibian fauna is analysed to test the standard zoogeographical division of the continent into Palaearctic and Afrotropical Regions. A comparably high faunal change north and south of the. tropical savannas suggests... -
Comments on the types and type localities of South African reptiles collected by Heinrich Bergius and Ludwig Krebs
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: AaronM. Bauer --- Villanova University, USAKarl Heinrich Bergius (1790–1818) and Georg Ludwig Engelhard Krebs (1792–1844) were German apothecaries living in South Africa who collected zoological material, including reptiles, for Martin Hinrich Carl Lichtenstein, director of the Zoological Museum of the Wilhelm-Friedrichs-Universität zu Berlin (ZMB). Although... -
Conference proceeding: An overview of East African amphibian studies, past, present and future: A view from Tanzania†
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: KimM. Howell --- University of Dar es Salaam, TanzaniaGerman explorers and scientists began the study and description of the East African amphibian fauna. Later, Arthur Loveridge played a leading role in collecting, describing and analysing the East African amphibian fauna; his 1957 checklist for the region is still... -
A new blind snake (Serpentes: Typhlopidae) from montane forests of the Eastern Arc mountains in Tanzania
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DonaldG. Broadley --- Research Associate, Natural History Museum of Zimbabwe, Van Wallach --- , U.S.A. -
Morphometrics and sexual dimorphism of the hinge‐back tortoises Kinixys erosa and Kinixys homeana (Reptilia: Testudinidae) in southwestern Cameroon
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DwightP. Lawson --- The University of Texas at Arlington, U.S.A.Morphometric data on a series of forest‐dwelling hingeback tortoises, 138 Kinixys erosa and 74 Kinixys homeana, from the Southwest Province of Cameroon, Africa, where they are sympatric, are presented. The two species exhibited opposite trends in sexual size dimorphism. Unique... -
Morphometrics, sexual dimorphism, and growth in the angonoka tortoise (Geochelone yniphora) of western Madagascar
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: LoraL. Smith --- University of Florida, USA Miguel Pedrono --- Université Pierre et Marie Curie, France RobertM. Dorazio --- U.S. Geological Survey, USA Jack Bishko --- University of Florida, USAThe most recent description of the morphology of the rare endemic Madagascar tortoise, Geochelone yniphora was based on fewer than 20 specimens. We collected morphological data for 200 free‐ranging tortoises from five populations over a four‐year period. Tortoises ranged in... -
Towards a natural classification of African toads (Anura, Bufonidae): Past progress and future prospects
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: BarryT. Clarke --- The Natural History Museum, EnglandAfrican bufonid toads (especially members of the genus Bufo) are a relatively uniform group morphologically, but beneath this apparent uniformity lies a higher level of diversity in habits and lifestyle than is initially evident. Members of the group exhibit considerable... -
Reproduction in the brown house snake, Lamprophis fuliginosus, from Tanzania
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: NeilB. Ford --- University of Texas at Tyler, USA -
Anurans in the Kilombero Valley, Tanzania: Comparison between miombo woodland, evergreen forest and teak plantations
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Roy Hinde --- Society for Environmental Exploration, United Kingdom Graham Corti --- Society for Environmental Exploration, United Kingdom Eibleis Fanning --- Society for Environmental Exploration, United Kingdom RichardK.B. Jenkins --- Society for Environmental Exploration, United Kingdom -
A review of the genus Thelotornis A. Smith in eastern Africa, with the description of a new species from the Usambara Mountains (Serpentes: Colubridae: Dispholidini)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DonaldG. Broadley --- Research Associate, Natural History Museum of Zimbabwe,The populations of Thelotornis in eastern Africa are reviewed. Thelotornis kirtlandii extends east of the Albertine rift to Uganda and the Imatong Mountains in southern Sudan, but in Tanzania it is only represented by a few relict populations in montane... -
Conservation status of herpetofauna endemic to Kwazulu‐Natal
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: AdrianJ. Armstrong --- KwaZulu‐Natal Nature Conservation Service, South AfricaThe KwaZulu‐Natal Nature Conservation Service is undertaking a long‐term project to determine the value of untransformed land for biodiversity conservation, to map these areas in accordance with their relative values, and to identify and prioritise irreplaceable areas. Existing distribution data... -
Residue loads in amphibians used as biomarkers of pesticide levels entering food chains in sub‐Saharan Africa
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: MichaelR.K. Lambert --- University of Greenwich, United KingdomResidues accumulate rapidly in amphibians to reach lethal levels. During previous years in Zimbabwe, total DDT residues from general agricultural contamination were at 3.90 ppm wet weight in Bufo gutturalis and 1.50 ppm in Ptychadena anchietae. Dieldrin residues in the... -
Courtship in The Madagascar Cat‐eyed Snake, Madagascarophis colubrina (Boiginae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Rita Mehta --- University of Texas at Tyler, USA NeilB. Ford --- University of Texas at Tyler, USA -
A review of the small east African Cordylus (Sauria: Cordylidae), with the description of a new species
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: DonaldG. Broadley --- Research Associate, Natural History Museum of Zimbabwe, WilliamR. Branch --- Port Elizabeth Museum, South AfricaThe small and previously neglected East African girdled lizards (excluding the Cordylus warreni complex) are reviewed and seven species are recognised. The terrestrial species C. ukingensis (Loveridge) is restricted to montane grasslands in southwestern Tanzania and may be of conservation... -
The effect of anthropogenic habitat modification on habitat use by Afrana angolensis along the dodwe river, Tanzania
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: ScottG. Lynn --- University of Kentucky, USA Christian Lindle --- University of Vienna, Austria -
A review of the species of Psammophis Boie found south of Latitude 12° S (Serpentes: Psammophiinae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DonaldG. Broadley --- Research Associate, Natural History Museum of Zimbabwe,The status, relationships and zoogeography of the 14 taxa of Psammophis found south of Latitude 12° S are reviewed and the following taxonomic changes are proposed: 1. Psammophis trinasalis and P. namibensis, previously treated as subspecies of... -
Frequency of tail autotomy in the African Olive Grass Snake, Psammophis ‘phillipsii’ from three habitats in southern Nigeria
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: GodfreyC. Akani --- Rivers State University of Science and Technology, Nigeria Luca Luiselli --- F.I.Z.V. (Ecology) and Centre of Environmental Studies “Demetra”, Italy SundayM. Wariboko --- Rivers State University of Science and Technology, Nigeria Linda Ude --- F.I.Z.V. (Ecology) and Centre of Environmental Studies “Demetra”, Italy FrancescoM. Angelici --- F.I.Z.V. (Ecology) and Centre of Environmental Studies “Demetra”, Italy -
Arthroleptis troglodytes and the content of schoutedenella (Amphibia: Anura: Arthroleptidae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: JohnC. Poynton --- Natural History Museum, UKLaurent (1954) transferred a large number of species then in Arthroleptis to the genus Schoutedenella, which up to that time was a monotypic genus distinguished by de Witte (1921) from Arthroleptis on the grounds of lacking maxillary teeth. Laurent's concept... -
Adult male aggression towards juvenile males in the large‐scaled girdled lizard, cordylus macropholis
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: CaraJ. Nieuwoudt --- University of Stellenbosch, South Africa P. le FrasN. Mouton --- University of Stellenbosch, South Africa AlexanderF. Flemming --- University of Stellenbosch, South AfricaAgonistic behaviour and differences in adult male behaviour towards male and female juveniles were investigated in Cordylus macropholis during the mating season. Encounters (N = 7 in all cases) were staged between adult males, between adult males and juvenile males,... -
Phylogenetic relationships of African caecilians (Amphibia: Gymnophiona): Insights from mitochondrial rRNA gene sequences
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mark Wilkinson --- The Natural History Museum, UK SimonP. Loader --- The Natural History Museum, UK DavidJ. Gower --- The Natural History Museum, UK JonathanA. Sheps --- University of Glasgow, Scotland, UK BernardL. Cohen --- University of Glasgow, Scotland, UKAfrica (excluding the Seychelles) has a diverse caecilian fauna, including the endemic family Scolecomorphidae and six endemic genera of the more cosmopolitan Caeciliidae. Previous molecular phylogenetic studies have not included any caecilians from the African mainland. Partial 12S and 16S... -
Re‐discovery of Cynisca bifrontalis in Gabon, with additional notes on Monopeltis galeata (Reptilia: Amphisbaenia)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: WilliamR. Branch --- Port Elizabeth Museum, South Africa OlivierS.G. Pauwels --- Institut Royal des Sciences naturelles de Belgique, Belgium Marius Burger --- University of the Western Cape, South AfricaA small series of amphisbaenians from the Toucan/Rabi region, Ogooué‐Maritime Province, south‐western Gabon, is reported. It includes five specimens of Cynisca bifrontalis (Boulenger 1906), previously known only from the holotype, and five specimens of Monopeltis galeata (Hallowell 1852). The Toucan/Rabi... -
A new giant species of Arthroleptis (Amphibia: Anura) from the Rubeho Mountains, Tanzania
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: JohnC. Poynton --- The Natural History Museum, UKTwo giant specimens of Arthroleptis attaining a snout‐vent length of 57 mm, from the Rubeho Mountains in southern Tanzania are described as a new species. They are distinguished from the giant species A. tanneri of the West Usambara Mountains by... -
A new species of Arthroleptella Hewitt, 1926 (Anura: Ranidae) from the Groot Winterhoek mountains of the Western Cape province, South Africa
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: AndrewA. Turner --- Western Cape Nature Conservation Board, South Africa AthertonL. de Villiers --- Western Cape Nature Conservation Board, South Africa Abeda Dawood --- University of Pretoria, South Africa Alan Channing --- University of the Western Cape, South AfricaA new species of Arthroleptella (moss frog), is described from the Groot Winterhoek Mountains in the Western Cape Province, South Africa. The new species is allopatric to other Arthroleptella species. It is distinguished from other Arthroleptella species by its advertisement... -
Stream frogs in Tanzania (Ranidae: Strongylopus): The case of S. Merumontanus and S. Fuelleborni
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: JohnC. Poynton --- The Natural History Museum, UKExamination of the holotype of Strongylopus merumontanus (Lönnberg) points to Barbour & Loveridge (1928) being unjustified in referring Stream Frogs from northeastern Tanzania to this species. Their material is here assigned to the widespread S. fuelleborni, a species shown to... -
The reptiles of southeast Katanga, an overlooked ‘hot spot’
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DonaldG. Broadley --- Research Associate, Natural History Museum of Zimbabwe, F.P.D. Cotterill --- University of Stellenbosch, South AfricaA review of the reptiles recorded from southeast Katanga Province in the Democratic Republic of Congo, employing the evolutionary species concept, indicates that there are at least 119 species in the area (7 chelonians, 37 lizards, 4 amphisbaenians, 69 snakes... -
Misidentification of Dromophis lineatus (Dumèril & Bibron, 1854) as Psammophis sibilans (Linné 1758) and the perpetuation of error
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Barry Hughes --- , UKBeing struck by the number of instances of misidentification of Dromophis lineatus as Psammophis spp. by recognised authorities, I have summarised those that have come to my notice and tried to draw some useful conclusions from such errors. These are:... -
A specimen of Leptotyphlops bicolor (Jan) from Ghana with a “subocular” (Serpentes: Leptotyphlopidae), with a note on the skull of this species
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DonaldG. Broadley --- Research Associate, Natural History Museum of Zimbabwe,A specimen of Leptotyphlops bicolor (Jan) from Mole National Park, Ghana, has the second supralabial in broad contact with the third and it becomes a virtual subocular, excluding the ocular from the lip. This condition was previously considered diagnostic for... -
The comparative diet of three Saharan sand dune skinks
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Omar Attum --- University of Louisville, Charles Covell --- University of Louisville, Perri Eason --- University of Louisville,We compared the diets of the only three sand dune skinks of North Sinai, Chalcides ocellatus, Scincus scincus, and Sphenops sepsoides. Despite our small sample size, we found several interesting trends. Coleoptera was the most common prey order eaten by... -
A review of the southern African ‘non‐spitting’ cobras (Serpentes: Elapidae: Naja)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DonaldG. Broadley --- Research Associate, Natural History Museum of Zimbabwe, Wolfgang Wüster --- University of Wales, Wales, U.K.We analysed the systematics of the ‘non‐spitting’ cobras of southern Africa, paying particular attention to the Naja annulifera complex. Multivariate morphometric analyses demonstrate that the taxa annulifera and anchietae are consistently distinct and homogenous over their respective ranges, and their... -
Molecular phylogenetics of Malagasy skinks (Squamata: Scincidae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: AlisonS. Whiting --- Brigham Young University, USA JackW. Sites --- Brigham Young University, USA AaronM. Bauer --- Villanova University, USAMalagasy skinks are a poorly known group, and their relationships have not been critically evaluated previously. In this paper we present a phylogeny of Malagasy “scincine” lizards, based on quantitative phylogenetic analysis of data from seven molecular markers. Our analysis... -
A review of Whyte's Water‐snake, Lycodonomorphus whytii (Serpentes: Colubridae: Lamprophiinae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Jens Bødtker Rasmussen --- University of Copenhagen, DenmarkLycodonomorphus whytii from Malawi and Tanzania is only known from three specimens. Additional potential records from the area in question are carefully discussed and four recently obtained specimens have been examined in respect to lepidosis, dentition, size, internal morphology and... -
Serengeti amphibians: Distribution and monitoring baseline
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Alan Channing --- University of the Western Cape, South Africa A.R.E. Sinclair --- University of British Columbia, Canada S.A.R. Mduma --- Serengeti Biodiversity Programme, Tanzania D. Moyer --- Wildlife Conservation Society, Tanzania D. A. Kreulen --- , NetherlandsThe Serengeti National Park in Tanzania was surveyed for amphibians in May 2003. Records were based on the collection of adults and tadpoles, and the recording of male advertisement calls. Literature records, museum records, and field notes from an earlier... -
Niche separation and comparative abundance of Boulengerula boulengeri and Scolecomorphus vittatus (Amphibia: Gymnophiona) in an East Usambara forest, Tanzania
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DavidJ. Gower --- The Natural History Museum, UK SimonP. Loader --- University of Glasgow, UK CliveB. Moncrieff --- The Natural History Museum, UK Mark Wilkinson --- The Natural History Museum, UKThe ecology of the sympatric caecilians Boulengerula boulengeri and Scolecomorphus vittatus was studied in Nilo Forest Reserve in the East Usambara Mountains, Tanzania. Three sampling methods (timed digging, pitfall trapping and casual visual encounter surveys of the forest floor) yielded... -
A new cryptic frog of the genus Boophis from the northwestern rainforests of Madagascar
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Miguel Vences --- University of Amsterdam, The Netherlands Frank Glaw --- Zoologische Staatssammlung, GermanyWe describe a new species of arboreal frog of the Boophis mandraka group (Anura: Mantellidae) from Manongarivo Special Reserve in north‐western Madagascar. This new species is morphologically similar to the other species of this group: B. liami, B. mandraka, and... -
Letheobia pauwelsi, a new species of blindsnake from Gabon (Serpentes: Typhlopidae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Van Wallach --- Harvard University, USAA new species of African blindsnake related to western Letheobia caecus and eastern L. acutirostratus is described from Gabon. It differs from both species in having an hourglass dorsal rostral shape, a ventrally angled corneal cutting edge, and a unicameral... -
Phrynobatrachus alticola Guibé & Lamotte, 1961 is a junior synonym of Phrynobatrachus tokba (Chabanaud, 1921)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mark‐Oliver Rödel --- Theodor‐Boveri‐Institute (Biocenter of the University), Germany Joachim Kosuch --- Institute of Zoology, Germany N'Goran Germain Kouamé --- Université d'Abobo‐Adjamé, Côte dIvoire Raffael Ernst --- Theodor‐Boveri‐Institute (Biocenter of the University), Germany Michael Veith --- Institute of Zoology, GermanyBased on genetic similarity of topotypic material from Phrynobatrachus alticola and P. tokba, we synonymise the first with the latter. We analysed tissue samples from almost the entire distributional range of P. tokba. We report six 16S rDNA haplotypes with... -
Phylogenetic relationships of southern African geckos in the Pachydactylus group (Squamata: Gekkonidae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: AaronM. Bauer --- Villanova University, USA Trip Lamb --- East Carolina University, USAPachydactylus and its close relatives (Chondrodactylus, Colopus, Palmatogecko) constitute the most species‐rich component of the southern African gekkonid fauna. We conducted a phylogenetic analysis of mitochondrial (cytb, 12S rRNA, 16S rRNA) and nuclear (RAG‐1) gene sequences for these geckos. Pachydactylus... -
A new forest toad from the Ukaguru Mountains, Tanzania (Bufonidae: Nectophrynoides)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Alan Channing --- University of the Western Cape, South Africa Michele Menegon --- Museo Tridentino di Scienze Naturali, Italy Sebastiano Salvidio --- DIP.TE.RIS Corso Europa 26, Italy Scott Akker --- , United KingdomA new species of Nectophrynoides is described from the Ukaguru Mountains of Tanzania. It is distinguished from the other species in the genus by a combination of morphological characters. This is the only African bufonid known with a biphasic vocalization. -
Bufo uzunguensis of southern Tanzania (Amphibia: Anura): A history of confusion
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: JohnC. Poynton --- The Natural History Museum, UK Michele Menegon --- Museo Tridentino di Scienze Naturali, Italy Sebastiano Salvidio --- DIP.TE.RIS Corso Europa 26, ItalyType and more recently‐collected material of Bufo uzunguensis Loveridge, is compared with members of the "B. lonnbergi complex” of east African highland dwarf toads. It is concluded that B. uzunguensis is not a member of this complex despite many similarities... -
Cardioglossa liberiensis Barbour & Loveridge 1927 is a junior synonym of Phrynobatrachus fraterculus (Chabanaud 1921)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DavidC. Blackburn --- Harvard University, U.S.A.In 1927, Barbour & Loveridge described two species of Cardioglossa based on seven specimens from Liberia: C. decorata (six specimens) and C. liberiensis. Cardioglossa decorata has long been recognized as a junior synonym of Phrynobatrachus fraterculus (Chabanaud 1921), which is... -
Shell characteristics and sexual dimorphism in the Namaqualand speckled padloper, Homopus signatus signatus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: VictorJ.T. Loehr --- University of the Western Cape, South Africa BrianT. Henen --- University of the Western Cape, South Africa MargarethaD. Hofmeyr --- University of the Western Cape, South AfricaThere is little quantitative information regarding the two subspecies of the world's smallest tortoise, Homopus signatus. To help characterise the northern subspecies H. s. signatus and evaluate the development of shell size and colour patterns, we measured shell characteristics of... -
Biogeography of the reptiles of the central African republic
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Laurent Chirio --- Muséum National d'Histoire Naturelle, France Ivan Ineich --- Muséum National d'Histoire Naturelle, FranceA large number of reptiles from the Central African Republic (CAR) were collected during recent surveys conducted over six years (October 1990 to June 1996) and deposited at the Paris Natural History Museum (MNHN). This large collection of 4873 specimens... -
The effect of intergroup distance on group fidelity in the group‐living Lizard, Cordylus cataphractus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Eloise Costandius --- Stellenbosch University, South Africa P.Le FrasN. Mouton --- Stellenbosch University, South Africa AlexanderF. Flemming --- Stellenbosch University, South AfricaThe effect of intergroup distance on group fidelity in the Armadillo Lizard, Cordylus cataphractus, was studied in the Lambert's Bay/Graafwater area, South Africa. One hundred and six individuals from 27 groups were marked and recaptured regularly from May until September... -
Rediscovery and identity of Phrynobatrachus monticola Fischer, 1884
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mark‐Oliver Rödel --- Biocenter of the University, Germany Jakob Hallermann --- University of Hamburg, GermanyWe report on the rediscovery of the type specimen of Phrynobatrachus monticola Fischer, 1884 and clarify its real taxonomic position within the sub‐Saharan ranid genus Tomopterna. We redescribe the type and compare it to the other four currently recognized East... -
A revision of the East African species of Melanoseps Boulenger (Sauria: Scincidae: Feylininae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DonaldG. Broadley --- Research Associate, Natural History Museum of Zimbabwe, Zimbabwe AlisonS. Whiting --- Brigham Young University, USA AaronM. Bauer --- Villanova University, USAThe East African species of Melanoseps are revised and the following taxonomic changes proposed: 1. M. ater matengoensis Loveridge 1942 and M. ater misukuensis Loveridge 1953 are placed in the synonymy of M. ater (Günther 1873). 2. Melanoseps emmrichi sp... -
Diet of amphibians and reptiles from the Engare Ondare river region of central Kenya, during the dry season
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: LaurenceM. Hardy --- Louisiana State University in Shreveport, USA AmandaC. Crnkovic --- Louisiana State University in Shreveport, USAIn seasonally arid environments many species undergo some form of dormancy, such as aestivation. The dietary habits of those species during the period of seasonal aridity are poorly known. Little is known of the seasonal variation in the diet of... -
Homopholis and blaesodactylus (Squamata: Gekkonidae) revisited: New insights from a molecular phylogeny
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Eli Greenbaum --- Villanova University, USA AaronM. Bauer --- Villanova University, USA ToddR. Jackman --- Villanova University, USASouth African Homopholis Boulenger, 1885 and Madagascan Blaesodactylus Boettger, 1893 are gekkonid genera originally distinguished by minor differences in scalation. Subsequent morphological studies have argued either for synonymy of the genera, or retention of the original 19th century taxonomy. Moreover,... -
On the status of Simocephalus riggenbachi Sternfeld 1910
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: DonaldG. Broadley --- Research Associate, Natural History Museum of Zimbabwe,Comparison of the type of Simocephalus riggenbachi Sternfeld 1910 with material from Nigeria and Ghana suggests that it is based on a peripheral variant of Mehela crossi (Boulenger 1895) and should therefore be placed in synonymy. Although the type locality... -
A new species of Arthroleptella Hewitt, 1926 (Anura: Pyxicephalidae) from the Klein Swartberg Mountain, Caledon, South Africa
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: AndrewA. Turner --- Scientific Services, Western Cape Nature Conservation Board, South Africa Alan Channing --- University of the Western Cape, South AfricaA new species of moss frog (genus Arthroleptella) is described from the Klein Swartberg Mountain near Caledon in the Western Cape Province, South Africa to which it is confined. This allopatric species is distinguished from other Arthroleptella species by the... -
Translocation of black‐headed dwarf chameleons Bradypodion melanocephalum in Durban, KwaZulu‐Natal, South Africa
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: AdrianJ. Armstrong --- Ezemvelo KZN Wildlife, South AfricaThe coastal population of the black‐headed dwarf chameleon Bradypodion melanocephalum is threatened by rapid urban expansion in and around Durban which lies in the centre of the chameleon population's distribution. Translocations of threatened species from urban development sites is a... -
Clades in Heleophrynid Salientia
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: D. Eduard van Dijk --- University of Stellenbosch, South AfricaA northern and a southern clade is recognized in the Heleophrynidae, a family of southern African Salientia. A new genus, Hadromophryne is proposed for Heleoprhyne natalensis, and related Anura presently included in this species. -
A new giant species of Arthroleptis (Amphibia: Anura) from the forests of the Nguru Mountains, Tanzania
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: John Poynton --- Natural History Museum, UK SimonP. Loader --- University of Basel, Switzerland Michele Menegon --- Museo Tridentino di Scienze Naturali, ItalySpecimens of Arthroleptis attaining a body length of nearly 58 mm have been collected above 1790 m a.s.l. on the Nguru Mountains, part of the Eastern Arc mountain chain of Tanzania. In body size this material slightly surpasses the other... -
Hiding in plain sight: Another cryptic dainty frog from the highlands of Kenya (Anura: Pyxicephalidae: Cacosternum)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Alan Channing --- University of the Western Cape, South Africa Andreas Schmitz --- Muséum d'histoire naturelle, SwitzerlandA new species of dainty frog from the Kinangop Plateau in Kenya is described. It is geographically close to Cacosternum plimptoni, from which it is difficult to separate on morphology. It is significantly different from other East African species on... -
Within and between‐site distribution of frog species on the Udzungwa Plateau, Tanzania
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Lucinda Lawson --- University of Chicago, David Moyer --- Wildlife Conservation Society,Amphibian distribution and abundance patterns are linked with environmental factors that define the suitable habitat for each species on both macro and micro scales. Determining the distribution and habitat requirements of species is a necessary first step in monitoring population... -
Revalidation of Phrynobatrachus maculiventris Guibé & Lamotte, 1958 and description of its aposematic coloured tadpole
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mark‐Oliver Rödel --- Humboldt University Berlin, Germany Laura Sandberger --- Humboldt University Berlin, Germany Néma‐Soua Loua --- Société des Mines de Fer de Guinée, Republic of Guinea Joseph Doumbia --- Université de Conakry, Annika Hillers --- Humboldt University Berlin, GermanyPhrynobatrachus maculiventris Guibé & Lamotte, 1958 is a valid species. Herein we clarify its taxonomic status, re‐describe it, and provide the first description of its tadpole. The tadpoles’ specific identity was assessed through DNA barcoding. Phrynobatrachus maculiventris adults differ from... -
External morphology and osteology support the placement of Phrynobatrachus nlonakoensis plath, Herrmann & Böhme, 2006 within the genus Arthroleptis
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: BredaM. Zimkus --- Harvard University, USA JoannaG. Larson --- Harvard University, USAExamination of external morphology and osteology of type material of Phrynobatrachus nlonakoensis Plath, Herrmann, and Böhme, 2006 support a recent taxonomic change, transferring the species into the genus Arthroleptis, which was recently made without examination of specimens. -
New range extensions for Dasypeltis atra Sternfeld in Tanzania (Serpentes : Colubridae), with a review of the distribution of colour phases
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: DonaldG. Broadley --- Biodiversity Foundation for Africa, Zimbabwe MichaelF. Bates --- National Museum, South AfricaFour Tanzanian specimens of the patterned phase of Dasypeltis atra represent range extensions into savanna areas. One of these specimens, from Ibaya Camp in Mkomazi Game Reserve, extends the species’ range by about 100 km to the south‐east from Mount... -
Typhlosaurus jappi Broadley, 1968, a Valid Species of Acontine Skink
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Victoria Schneider --- Villanova University, USA AaronM. Bauer --- Villanova University, USANew evidence from scalation, dental, and reproductive traits supports the recognition of the Barotseland Blind Legless Skink, Typhlosaurus jappi, as a valid species distinct from T. lineatus. -
A new species of chameleon (Sanria: Chamaeleonidae: Kinyongia) from the Magombera forest and the Udzungwa Mountains National Park, Tanzania
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Michele Menegon --- Museo Tridentino di Scienze Naturali, Italy KrystalA. Tolley --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South Africa Trevor Jones --- c/o Udzungwa Mountains National Park, Tanzania Francesco Rovero --- Museo Tridentino di Scienze Naturali, Italy AndrewR. Marshall --- University of York, UK ColinR. Tilbury --- University of Stellenbosch, South AfricaA new species of chameleon Kinyongia magomberae sp. nov. (the Magombera chameleon), is described from Magombera forest and the Vdzungwa Mountains National Park, south-central Tanzania. The species status is supported by phylogenetic analyses using mitochondrial and nuclear markers. The new... -
Distribution and conservation of the coastal population of the black-headed dwarf chameleon Bradypodion melanocephalum in KwaZulu-Natal
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: AdrianJ. Armstrong --- Ezemvelo Kzn Wildlife, South AfricaThe coastal population of the black-headed dwarf chameleon Bradypodion melanocephalum in KwaZulu-Natal appears to be centred on the eThekwini Municipal Area, which is experiencing rapid urban development. This population occurs in few statutory protected areas, all of which are small... -
Small and sensitive to drought: consequences of aridifiation to the conservation of Homopus signatus signatus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Victor J. T. Loehr --- University of the Western Cape, South Africa MargarethaD. Hofmeyr --- University of the Western Cape, South Africa BrianT. Henen --- University of the Western Cape, South AfricaSeveral climate models predict that the western Succulent Karoo in South Africa will aridi-fy. This region includes the range of the smallest tortoise, Homopus signatus signatus. Although the effects of rainfall on the physiology and ecology of H. s. signatus... -
Ecological notes on two sympatric Psammophis species from East Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: AmandaM. Cottone --- Villanova University, USA AaronM. Bauer --- Villanova University, USAWe investigated the ecology of two sympatric whipsnakes from East Africa (Psammophis punctulatus trivirgatus and P. biseriatus) by examining preserved museum specimens (n = 40). Both species lacked any significant sexual size dimorphism and displayed seasonal reproductive cycles. These findings... -
Conservation assessment of the critically endangered frog Mantella aurantiaca in Madagascar
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Roma Randrianavelona --- Madagasikara Voakajy, Madagascar Harisoa Rakotonoely --- Université d' Antananarivo, Madagascar Jonah Ratsimbazafy --- Université d' Antananarivo, Madagascar RichardK. B. Jenkins --- Madagasikara Voakajy, MadagascarMantella aurantiaca is a small, bright orange, terrestrial amphibian that is endemic to the island of Madagascar. The species has attracted significant attention from herpetologists and captive breeders but relatively little effort has been given to its conservation in the... -
A new puddle frog (Phrynobatrachidae: Phrynobatrachus) from the Mambilla Plateau in eastern Nigeria
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: DavidC. Blackburn --- University of Kansas, USAA new species of puddle frog (Phrynobatrachus) is described from the Kurmin Danko Forest Reserve on the western edge of the Mambilla Plateau in eastern Nigeria. The new species is distinguished from both geographically proximate and closely related Phrynobatrachus species... -
Phylogeography of the Clicking Stream Frog Strongylopus grayii (Anura, Pyxicephalidae) reveals cryptic divergence across climatic zones in an abundant and widespread taxon
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: KrystalA. Tolley --- South African National Biodiversity Institute, South Africa Anne Braae --- South African National Biodiversity Institute, South Africa Michael Cunningham --- University of the Free State, South AfricaThe Clicking Stream Frog (Strongylopus grayii) occurs throughout southern and eastern South Africa across summer, aseasonal and winter rainfall areas. Because of its contiguous distribution and extended breeding season this species might be expected to show a phylogeographic pattern of... -
Small, specialised and highly mobile? The tree-hole breeding frog, Phrynobatrachus guineensis, lacks fine-scale population structure
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Laura Sandberger --- Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, Germany Heike Feldhaar --- University of Osnabrück, Germany KathrinP. Lampert --- University of Bochum, Germany DunjaK. Lamatsch --- Austrian Academy of Sciences and Institute for Limnology, Austria Mark-Oliver Rödel --- Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, GermanyData on population dynamics and distribution are of primary interest to biologists because they reveal information about the species' ecology and evolution and are thus essential for conservation efforts. Patchily distributed species are especially interesting for conservation studies, because of... -
An enigmatic mortality event in the only population of the Critically Endangered Cameroonian frog Xenopus longipes
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: DavidC. Blackburn --- University of Kansas, USA BenJ. Evans --- McMaster University, Canada AllanP. Pessier --- San Diego Zoo's Institute for Conservation Research, USA VanceT. Vredenburg --- San Francisco State University, USAContemporary global declines and mortality events in amphibian populations have been often attributed to infectious disease and climate change, separately and in combination. We report on an enigmatic mortality event in the only known population of the Critically Endangered frog... -
Two syntopic and microendemic new frogs of the genus Blommersia from the east coast of Madagascar
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Miguel Vences --- Technical University of Braunschweig, Germany Jörn Köhler --- Hessisches Landesmuseum, Germany Maciej Pabijan --- Technical University of Braunschweig, Germany Frank Glaw --- Zoologische Staatssammlung, GermanyWe describe two new species of semiarboreal frogs from the northern central east coast of Madagascar which occur syntopically, at least on the island of Nosy Boraha. The two species are morphologically closest to Blommersia wittei, but differ in advertisement... -
Aprosdoketophis andreonei, a new genus and species of snake from Somalia (Serpentes: Colubridae: Boiginae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Van Wallach --- , USA Benedetto Lanza --- Museo di Storia Naturale dell'Università di Firenze, Sezione di Zoologia “La Specola”, Italy Annamaria Nistri --- Museo di Storia Naturale dell'Università di Firenze, Sezione di Zoologia “La Specola”, ItalyAn aglyphous colubroid snake representing a new genus and species is described from Somalia. It is a terrestrial form that inhabits xerophytic woodlands. A comparison with both African and extralimital genera indicates that its relationships lie with the opisthoglyph Boiginae... -
Phylogenetic relationships among the Stiletto Snakes (genus Atractaspis) based on external morphology
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Katie Moyer --- Whitman College, USA Kate Jackson --- Whitman College, USAStiletto Snakes (genus Atractaspis) are the most poorly studied of the three clades of snakes with front-fanged venom-delivery systems. Fossorial and endemic to Africa and the Middle East, Atractaspis possess uniquely derived mobile fangs that allow them to perform a... -
Multi-locus phylogeny and evolution of reproductive modes in the Pyxicephalidae, an African endemic clade of frogs
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Arie van der Meijden --- Campus Agrário de Vairão, Portugal Angelica Crottini --- Technical University of Braunschweig, Germany Jeanne Tarrant --- North-West University, South Africa Andrew Turner --- CapeNature, South Africa Miguel Vences --- Technical University of Braunschweig, GermanyThe ranoid family Pyxicephalidae is an endemic group of African frogs, with the majority of its diversity concentrated in South Africa. Here we present the first molecular phylogeny that includes as many as nine of the ten pyxicephalid genera, omitting... -
Description of the tadpole of Amietophrynus brauni (Anura: Bufonidae) from the West Usambara Mountains, Tanzania
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jared Sprague --- , USA BredaM. Zimkus --- Museum of Comparative Zoology, USAThe tadpole of Amietophrynus brauni (Anura: Bufonidae), endemic to the forests of the Eastern Arc Mountains of Tanzania, is barcoded using 16S rRNA and described from the West Usambara Mountains. It differs from tadpoles of A. maculatus by its body... -
Phylogenetic position of the southern rock lizard Australolacerta australis within the Lacertidae radiation
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Daniele Salvi --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Portugal Pierluigi Bombi --- SPACEnvironment, Italy Leonardo Vignoli --- Roma Tre University, ItalyThe southern rock lizard Australolacerta australis is a rock-dwelling lizard endemic to South Africa. The phylogenetic relationships of this species with other lacertid lizards are still not clear and have never been assessed in any phylogeny of Lacertidae using DNA... -
Spawning and non-breeding activity of adult giant bullfrogs (Pyxicephalus adspersus)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: CarolineA. Yetman --- University of Pretoria, South Africa J. Willem H. Ferguson --- University of Pretoria, South AfricaPopulations of the giant bullfrog (Pyxicephalus adspersus) have been poorly monitored due to the unpredictable appearance of this species aboveground. To better understand the activity of P. adspersus we quantified spawning by a population during five summers, and the activity... -
Age structure in the false tomato frog Dyscophus guineti from eastern Madagascar compared to the closely related D. antongilii (Anura, Microhylidae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Giulia Tessa --- Università degli Studi, Italy FabioM. Guarino --- Università di Napoli Federico II, Italy JasminE. Randrianirina --- Parc Botanique et Zoologique de Tsimbazaza, Faune, Madagascar Franco Andreone --- Museo Regionale di Scienze Naturali, Zoology, ItalyThe false tomato frog, Dyscophus guineti, is an endemic species of eastern Madagascar, typically found in open and swampy areas of mid-elevation forests. We measured 62 females and 70 males from a population from Marovato, next to Brickaville. Snout-vent length... -
Rediscovery of Boulengerula fischeri, with notes on its morphology and habitat
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: G. John Measey --- Applied Biodiversity Research, Kirstenbosch Research Centre, South African National Biodiversity Institute, South Africa HaraldH. Hinkel --- The World Bank Country Office Kigali, Rwanda Bonny Dumbo --- University of Koblenz-Landau, Germany Eberhard Fischer --- University of Koblenz-Landau, GermanyCaecilians remain an enigmatic component of the tropical terrestrial fauna due in part to their cryptic life-history but also to a lack of directed effort towards their study. Many species are known from single specimens associated with poor collection data,... -
Medicinal and dietary uses of amphibians in Burkina Faso
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Meike Mohneke --- Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, Herpetology, Germany AbiodunB. Onadeko --- University of Lagos, Nigeria Mark-Oliver Rödel --- Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, Herpetology, GermanyHerein we present ethnozoological data on the use of frogs by two ethnic groups (Mossi and Gourmanché) in Burkina Faso. These data are based on 129 interviews. Differences concerning consumption, applications as medical treatments, and cultural purposes were recorded and... -
Social aggregation behaviour in the North African amphisbaenian Trogonophis wiegmanni
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: José Martín --- Museo Nacional de Ciencias Naturales, Spain Nuria Polo-Cavia --- Ciudad Universitaria de Cantoblanco, Spain Adega Gonzalo --- Museo Nacional de Ciencias Naturales, Spain Pilar López --- Museo Nacional de Ciencias Naturales, Spain Emilio Civantos --- Museo Nacional de Ciencias Naturales, SpainThe ecology and behaviour of Amphisbaenians is poorly known due to their fossorial habits. However, amphisbaenians are often found under rocks where they thermoregulate, and probably engage in social interactions. We describe aggregations under rocks in a North African population... -
Premature sperm ejaculation in captive African brown house snake Lamprophis fuliginosus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: AnthonyJ. Wilmes --- Saint Louis University, USA DustinS. Siegel --- Saint Louis University, USA RobertD. Aldridge --- Saint Louis University, USAMany ophidians exhibit prolonged copulation, a behaviour hypothesised to be the result of a slow and gradual ejaculation process or a behaviour aimed toward reducing sperm competition (male mate guarding). While observing courtship behaviour in a captive colony of the... -
A long-known new species of gecko allied to Pachydactylus bicolor (Squamata: Gekkonidae) from the central Namibian coast
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: MatthewP. Heinicke --- Villanova University, USA LaurenM. Adderly --- Villanova University, USA AaronM. Bauer --- Villanova University, USA ToddR. Jackman --- Villanova University, USAA new species of the ‘northwestern clade’ of Pachydactylus is described from the coast of central Namibia. It has long been considered a population of the widespread species Pachydactylus bicolor, from which it differs in body proportions, in having at... -
A new species of Cordylus (Squamata: Cordylidae) from the Marungu Plateau of south-eastern Democratic Republic of the Congo
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Eli Greenbaum --- University of Texas at El Paso, USA EdwardL. Stanley --- Richard Gilder Graduate School, American Museum of Natural History, USA Chifundera Kusamba --- Centre de Recherche en Sciences Naturelles, Lwiro, République Démocratique du, Congo WandegeM. Moninga --- Centre de Recherche en Sciences Naturelles, Lwiro, République Démocratique du, Congo StephenR. Goldberg --- Whittier College, USA CharlesR. Bursey --- , USACurrently there are 20 recognised species of the widespread lizard genus Cordylus, which is distributed throughout sub-Saharan Africa's non-forested habitats from Ethiopia to South Africa. Most recent taxonomic work has focused on forms in southern Africa, where several subspecific taxa... -
Karyotypes of two species of Malagasy ground gecko (Paroedura: Gekkonidae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Hana Main --- University of Minnesota, USA DanielP. Scantlebury --- University of Rochester, USA David Zarkower --- University of Minnesota, USA Tony Gamble --- University of Minnesota, USAThe karyotypes of Malagasy geckos are poorly known. Herein, we describe the karyotypes of two Malagasy gecko species, Paroedura picta and an undescribed or currently unrecognised Paroedura species. These are the first karyotypes described for the genus Paroedura. Each species... -
Revised phylogeny of African sand lizards (Pedioplanis), with the description of two new species from south-western Angola
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Werner Conradie --- , South Africa G. John Measey --- South African National Biodiversity Institute, South Africa WilliamR. Branch --- , South Africa KrystalA. Tolley --- South African National Biodiversity Institute, South AfricaAlthough reptile diversity in Africa is high, it is poorly represented in Angola, with just 257 species known. Despite its greater surface area and habitat diversity Angola has significantly lower lacertid lizard diversity than adjacent Namibia. This is particularly notable... -
Conspecific pheromone trailing and pheromone trail longevity in the African Colubrid Boaedon fuliginosus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: AnthonyJ. Wilmes --- Saint Louis University, USA JustinL. Rheubert --- Saint Louis University, USA DavidL. Gruenewald --- Saint Louis University, USA Tharun Kotaru --- Parkway South High School, USA RobertD. Aldridge --- Saint Louis University, USAIn snakes, pheromone trailing is a strategy used for long-distance location of conspecifics. The two existing hypotheses for this behaviour are: a) to locate individuals for reproductive purposes; and b) to form aggregations during the winter/dry season. Pheromone trailing for... -
Systematics of the poorly known treefrog Leptopelis fiziensis (Anura: Arthroleptidae), with a description of its call
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Eli Greenbaum --- University of Texas at El Paso, USA Frank Portillo --- University of Texas at El Paso, USA Chifundera Kusamba --- Centre de Recherche en Sciences Naturelles, République Démocratique du CongoLeptopelis fiziensis was described as a subspecies of L. modestus from specimens that were collected in 1956 in the region in and around Fizi, in present-day Democratic Republic of the Congo. We recently discovered L. fiziensis in transitional and montane... -
Untangling the complex: molecular patterns in Trachylepis variegata and T. punctulata (Reptilia: Scincidae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: DanielM. Portik --- Villanova University, USA AaronM. Bauer --- Villanova University, USAThe Mabuya [=Trachylepis] lacertiformis complex is comprised of four species with a high degree of morphological overlap and a convoluted taxonomic history. Of these four species, T. punctulata and T. variegata possess the broadest ranges, together covering much of southern... -
Phylogeny and phylogeography of the Malagasy leaf-tailed geckos in the Uroplatus ebenaui group
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Fanomezana Mihaja Ratsoavina --- Zoological Institute, Technical University of Braunschweig, Germany Miguel Vences --- Zoological Institute, Technical University of Braunschweig, Germany EdwardE. Louis --- Omaha's Henry Doorly Zoo and Aquarium, USALeaf-tailed geckos, genus Uroplatus, are one of the most prominent endemic reptile groups from Madagascar, but the species diversity and diversification of this taxonomic group are not completely understood. Here, we present a phylogenetic reconstruction of the small-sized Uroplatus which... -
Description of the tadpoles of two Cameroonian frogs, Leptodactylodon axillaris and L. perreti (Anura: Arthroleptidae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Deise Cruz --- California Academy of Sciences, USA AnneliseL. Dawson --- Harvard University, USA DavidC. Blackburn --- California Academy of Sciences, USAWe describe the tadpoles of two closely related frog species of the genus Leptodactylodon (family Arthroleptidae), L. axillaris and L. perreti, that are restricted to the mountains of Cameroon. Tadpoles were collected from near the type locality of each species... -
Afrotemperate Amphibians in southern and eastern Africa: a critical review
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: JohnC. Poynton --- Natural History Museum, UKThe term ‘Afrotemperate’ is taken to cover the area and fauna of the southern Cape, eastern highlands of South Africa, and intertropical highlands. A feature of Afrotemperate distribution is that it conforms to climatic zones rather than to latitudinal zonation... -
Discovery of the second specimen of the African amphisbaenian Monopeltis kabindae Witte & Laurent, 1942
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Lívia Cristina dos Santos --- , , BrazilThe genus Monopeltis (Reptilia, Amphisbaenia) is widespread in sub-Saharan Africa, occurring in several areas, from South Africa to Cameroon. Monopeltis kabindae Witte & Laurent, 1942 was until now only known from its type specimen, which was collected in 1930 in... -
Morphological variation in Monopeltis guentheri from forest habitat in Brazzaville, Republic of Congo (Squamata: Amphisbaenidae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Sylvestre Boudzoumou --- , Republic of Congo Daniel Hoops --- , , Australia Victor Mamonekene --- , Republic of Congo Kate Jackson --- , , USASixty-four Monopeltis guentheri were collected in a small patch of remnant forest within the city of Brazzaville, Republic of the Congo, and were measured for morphological characters traditionally used to classify five species of Central and West African Monopeltis amphisbaenians... -
Spatial and temporal distribution of call activities of two Gephyromantis species (Mantellidae) along forest–farmbush habitat in Ranomafana, Madagascar
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Noelikanto Ramamonjisoa --- , , Madagascar Harisoa Rakotonoely --- , , Madagascar Hannah Thomas --- , MadagascarUnderstanding how changes in land use affect the distribution, abundance and behaviour of organisms is an increasingly important question in ecology. We investigated the distribution and the differential calling behaviour of two diurnal terrestrial frogs, Gephyromantis decaryi (Near Threatened) and... -
A molecular phylogeny for sub-Saharan amphisbaenians
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: G. John Measey --- , , South Africa Krystal A. Tolley --- , , South AfricaAmphisbaenians are enigmatic members of the subterranean herpetofauna with the majority of their diversity concentrated in South America and Africa. The largest family, Amphisbaenidae, occurs in South America and Africa, but the phylogenetic relationships among the genera are not clearly... -
Amphibian survey and current absence of Batrachochytrium dendrobatidis (Bd) in Ivoloina Park, Toamasina (eastern Madagascar)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Angelica Crottini --- , Portugal An Bollen --- , Belgium Ché Weldon --- , , South Africa Desiré L. Dalton --- , South Africa Antoinette Kotzé --- , South Africa Jean Noël --- , Madagascar Bernard Iambana --- , Madagascar Franco Andreone --- , ItalyAmphibians are threatened globally by the chytridiomycete fungus Batrachochytrium dendrobatidis (Bd), which is still expanding in range. Madagascar, rich in amphibian diversity, remains one of the few places that the fungus has not invaded. Herein, we present results from a... -
Restoring breeding habitat for Giant Bullfrogs (Pyxicephalus adspersus) in South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Ryan L. Thomas --- , , South Africa Lynne Owen-Smith --- , , South Africa Deanne C. Drake --- , , South Africa Graham J. Alexander --- , , South AfricaHabitat fragmentation and transformation arising from urbanisation are leading causes of frog population declines. Artificial wetlands are sometimes used in remediation to minimise biodiversity loss in urban landscapes, but little is known about the specific habitat requirements of frog species... -
Differentiation within the endemic burrowing skink Pamelaescincus gardineri, across the Seychelles islands, assessed by mitochondrial and nuclear markers
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Joana Valente --- , , Portugal Sara Rocha --- , , Portugal D. James Harris --- , , PortugalUnveiling patterns of genetic differentiation across insular distributions is relevant for biogeographic and conservation reasons. In the Indian Ocean, surprisingly, little is known regarding the genetic structure of many taxa across the Seychelles Islands, despite their importance as old Gondwanic... -
Mapping the strength of sectoral innovation system in the Nigerian pharmaceutical industry: Empirical evidence
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Rachael Aderonke Ayo-Lawal --- Obafemi Awolowo University, Nigeria Caleb Muyiwa Adelowo --- Obafemi Awolowo University, Nigeria Ayobami Adesina Oyewale --- Obafemi Awolowo University, Nigeria Emmanuel Emeka Ejim-Eze --- Obafemi Awolowo University, Nigeria Elizabeth Adeteju Omimakinde --- Obafemi Awolowo University, Nigeria Wilson Oyekigho Erhun --- Obafemi Awolowo University, Nigeria Okechukwu Ukwuoma --- Obafemi Awolowo University, NigeriaIt is well known that innovation in the modern economy is driven by interactions among the stakeholders that make up the innovation system. Effective interactions among key actors in an innovation system foster flow of knowledge and resources development and... -
Water quality of the Blue Nile at Khartoum, Sudan, before complete filling of the Grand Ethiopian Renaissance Dam
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AMH Bashir --- University of Khartoum, Sudan ME Abdelrahman --- University of Khartoum, Sudan FA Sinada --- University of Khartoum, SudanPhysico-chemical variables were monitored biweekly for the Blue Nile at Khartoum between July 2017–June 2019. The aim was to document the present status of water quality at Khartoum before complete filling of the Grand Ethiopian Renaissance Dam (GERD). Physico-chemical parameters... -
New host and distribution records for five species of Enterogyrus Paperna, 1963 (Dactylogyridae: Ancyrocephalinae) from cichlid hosts in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Iva Přikrylová --- University of Limpopo, South Africa Sareh Tavakol --- University of Limpopo, South Africa Nico J Smit --- North-West University, South Africa Willem J Smit --- University of Limpopo, South Africa Wilmien J Luus-Powell --- University of Limpopo, South AfricaBetween March 2015 and September 2016, three species of Cichlidae (Coptodon rendalli, Oreochromis mossambicus and Tilapia sparrmanii) were screened for the presence of stomach monogeneans. Four localities across three provinces of South Africa (Limpopo, Northern Cape and North West) were... -
A comparison of the water quality and plankton diversity of the Okamini Stream to the freshwater systems within the New Calabar River catchment, Port Harcourt, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BB Otene --- Rivers State University, Nigeria I Thornhill --- University of Manchester, United Kingdom J Amadi --- Rivers State University, NigeriaThe water quality and phytoplankton diversity of the Okamini Stream, Port Harcourt, Nigeria was studied between April and June 2018 at three stations. The data was used to assess the health of the system for supporting local communities. Compared to... -
Assessment of water quality for suitability and human health risk: a study of the Owan River, Edo State, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Nkonyeasua Kingsley Egun --- University of Benin, Nigeria Ijeoma Patience Oboh --- University of Benin, NigeriaSuitability assessment of water bodies for human consumption and its implication on human health is critical to water resources utilisation and sustainable development. This study investigated the water quality of the Owan River and the potential health risk to users... -
HIV infections averted at PEPFAR-APIN clinics in Nigeria: a ten-year retrospective evaluation of the clinical outcomes of post-exposure prophylaxis services
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Abdulmuminu Isah --- University of Nigeria, Nigeria Nneka Uchenna Igboeli --- University of Nigeria, Nigeria Obinna Felix Dim --- University of Nigeria, Nigeria Azubuike Amos Ekwuofu --- University of Nigeria, NigeriaIntroduction: Nigeria contributes a high fraction to the global burden of HIV infections. Post-exposure prophylaxis (PEP) is a proven strategy to prevent transmission of the virus. The aim of this study was to determine the clinical outcomes of PEP in... -
Crossing the Boundary: An Investigation of Transnationalism, Transculturalism and Transracial Marriages in Jane Katjavivi’s Undisciplined Heart and Trudie Amulungu’s Taming My Elephant
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Selma K. Shiyoka --- University of Namibia, Namibia Nelson Mlambo --- University of Namibia, NamibiaThe focus of this paper is to explore the literary portrayal of transnational identities, transculturalism and transracial marriages as presented by two expatriate female writers who have made their niche in the postcolonial Namibian autobiographical (sub) genre, namely, Taming My... -
Who does better on life satisfaction and meaning in life? A Mixed-methods exploration of demographic characteristics and well-being in Ghana
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Angelina Wilson Fadiji --- University of Pretoria, South Africa Shingairai Chigeza --- University of Pretoria, South Africa Bontle Kgopa --- University of Pretoria, South AfricaThe present study examined the relationship between the demographic characteristics of age, sex, religious practice, and standard of living with life satisfaction and meaning in life in a Ghanaian setting. Participants were 394 Ghanaian urban adults (female = 43.90; mean... -
A natural terminal Pleistocene decline of African penguin populations enhances their anthropogenic extinction risk
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H Beckett --- Stellenbosch University, South Africa OK Hansen --- Stellenbosch University, South Africa S von der Heyden --- Stellenbosch University, South Africa GF Midgley --- Stellenbosch University, South AfricaThe African penguin Spheniscus demersus, endemic to the coast of southern Africa, has suffered anthropogenic-driven population declines since 1900 and is now listed as Endangered on the IUCN Red List. Conservation efforts currently underway are informed by the species’ adaptive... -
A photo-identification-based assessment model of southern right whales Eubalaena australis surveyed in South African waters, with a focus on recent low counts of mothers with calves
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Brandão --- University of Cape Town, South Africa A Ross-Gillespie --- University of Cape Town, South Africa E Vermeulen --- University of Pretoria, South Africa DS Butterworth --- University of Cape Town, South AfricaPhoto-identification data for southern right whale cow–calf pairs on the South African calving grounds provide one of the longest abundance time-series for any whale population worldwide. Following a very steady increase from a heavily depleted state, surveys since 2015 reflect... -
Magellan mussels Aulacomya atra from the South African coast show high diversity within populations but a lack of geographic differentiation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JP Grobler --- University of the Free State, South Africa Z Zhao --- University of the Free State, South Africa JW Jones --- , United States A Kotze --- University of the Free State, South AfricaThe Magellan mussel Aulacomya atra is a bivalve mollusc found along parts of the South African and Namibian coastline. Its numbers were low historically compared with other indigenous species but have decreased further since the 1970s owing to habitat invasion... -
Is it like night and day? Nocturnal versus diurnal perch use by dwarf chameleons (Bradypodion pumilum)
Item type: Journal Article • Journal: Treading a Delicate Tightrope: A principal balancing between education and political change during turbulent times • Authors: Krystal A Tolley --- , South AfricaArboreal chameleons must navigate a complex, three-dimensional landscape consisting of trees, bushes and/or grasses of various sizes. This complexity equates to the microhabitat of chameleons, that is, the branches upon which they perch and through which they move. Therefore, chameleons... -
An inventory of amphibian roadkill in the western Soutpansberg, Limpopo province, South Africa
Item type: Journal Article • Journal: Treading a Delicate Tightrope: A principal balancing between education and political change during turbulent times • Authors: Thabo I Hlatshwayo --- , South Africa Eduard M Stam --- , South Africa Wendy J Collinson-Jonker --- , South Africa Abeda Dawood --- , South AfricaIncreasing linear infrastructure development often impacts habitats and wildlife negatively. Roads, in particular, have numerous threats to wildlife with the most noticeable direct impact being roadkill, and this requires urgent conservation interventions. To assess amphibian roadkill, driven surveys were conducted... -
Call repertoire of Ptychadena uzungwensis (Anura: Ptychadenidae) to complement molecular and morphological identification of the species from the Soutpansberg, South Africa.
Item type: Journal Article • Journal: Treading a Delicate Tightrope: A principal balancing between education and political change during turbulent times • Authors: Ferdi De Lange --- , South Africa Edward C Netherlands --- , South Africa Louis H Du Preez --- , South AfricaThe identity of adults and tadpoles of Ptychadena uzungwensis from the Soutpansberg range in northern South Africa was confirmed using a combination of morphological characters and molecular analysis. Detailed vocalisation analysis was made and used to complement existing species identification... -
Genetic diversity of the mantellid frog Blommersia blommersae, and description of a new anuran species from south-eastern Madagascar
Item type: Journal Article • Journal: Treading a Delicate Tightrope: A principal balancing between education and political change during turbulent times • Authors: Miguel Vences --- , Germany Moritz Armerding --- , Germany Jörn Köhler --- , Germany Frank Glaw --- , GermanyA range-wide assessment of genetic variation in one mitochondrial (16S rRNA) and one nuclear-encoded (Rag-1) gene fragment of the widespread Madagascar frog Blommersia blommersae revealed the presence of up to 12 deep genetic lineages. Many of these differed by genetic... -
Notes on lung development in South African ghost frogs (Anura: Heleophrynidae)
Item type: Journal Article • Journal: Treading a Delicate Tightrope: A principal balancing between education and political change during turbulent times • Authors: Jackson R Phillips --- , USA Jens Reissig --- , South Africa Gary Kyle Nicolau --- , USALungs are a prototypical trait of most tetrapods, but some amphibians have become secondarily lungless over evolutionary time. Anuran (frog) tadpoles offer an opportunity to examine lung loss from an evolutionary perspective, because there are many independent instances where lungs... -
Spatial interpolation of vertisol physico-chemical properties through ordinary kriging in south-eastern Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Muketiwa Chitiga --- Lupane State University, Zimbabwe Gabriel Soropa --- Chinhoyi University of Technology, Zimbabwe Trevor Dube --- Midlands State University, Zimbabwe Progress Sengera --- GreenFuel, ZimbabweA decline in sugarcane yields from Block G (∼400 ha) of GreenFuel’s Chisumbanje Estate in south-eastern Zimbabwe prompted a study on spatial variability of the soil physico-chemical parameters in the 2017–2018 farming season. Using a systematic gridding schema, 123 geo-located... -
Frame presentations of compact hedgehogs and their properties
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Igor Arrieta --- University of Coimbra, Portugal Javier Gutiérrez García --- University of the Basque Country UPV/EHU, Spain Jorge Picado --- University of Coimbra, PortugalThis paper considers the compact hedgehog as a frame presented by generators and relations, based on the presentation of the frame of extended real numbers. The main focus will be on the point-free version of continuous and semi-continuous functions that... -
Further results on the independent Roman domination number of graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Abel Cabrera Martínez --- Universitat Rovira i Virgili, Spain Frank A. Hernández Mira --- Universidad Autónoma de Guerrero, MéxicoLet f : V (G) → {0, 1, 2} be a function on a graph G with vertex set V (G). Let Vi = {v ∈ V (G) : f (v) = i} for every i ∈ {0, 1, 2}... -
On norm-attainment in (symmetric) tensor products
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Sheldon Dantas --- Universitat Jaume I, Spain Luis C. García-Lirola --- Universidad de Zaragoza, Spain Mingu Jung --- POSTECH, Republic of Korea Abraham Rueda Zoca --- Universidad de Murcia, SpainIn this paper, we introduce a concept of norm-attainment in the projective symmetric tensor product of a Banach space X, which turns out to be naturally related to the classical norm-attainment of N -homogeneous polynomials on X. Due to this... -
Calonectria species diversity on eucalypts in Indonesia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Marthin Tarigan --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Nam Q Pham --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Fahimeh Jami --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Leonardo SS Oliveira --- , Brazil Muhammad Agni Saha --- Asia Pacific Resources International Holdings Ltd (APRIL), Indonesia Alvaro Durán --- Asia Pacific Resources International Holdings Ltd (APRIL), Indonesia Michael J Wingfield --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South AfricaDiseases increasingly threaten the rapidly expanding eucalypt plantation industry of Indonesia. Of these, leaf blight caused by Calonectria spp. is considered amongst the more important problems, causing losses both in production nurseries and plantations. Using DNA sequence data based on... -
Some geometric and physical properties of pseudo ψ-conharmonically symmetric manifolds
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Krishnendu De --- Kabi Sukanta Mahavidyalaya, The University of Burdwan, India Uday Chand De --- University of Calcutta, IndiaIn this article, we present a new tensor that generalizes the conharmonic curvature tensor, termed the ψ-conharmonic curvature tensor. In the first part, we derive some fundamental geometrical properties of a pseudo ψ-conharmonically symmetric manifold (briefly, ) and give some... -
The weight distribution of hulls of binary codes from incidence matrices of complete graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Khumbo Kumwenda --- Mzuzu University, Malawi Caleb Namondwe --- Mzuzu University, MalawiWe characterise the weights of all codewords of the hull of the binary code spanned by rows of an incidence matrix Bn of the complete graph Kn for n ≥ 4 and n even. Among others, we show that every... -
Tracking error volatility and relative risk budgets
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Aron Gottesman --- Pace University,This paper uses a pooled cross-sectional sample of actively managed US equity mutual funds from 1991–2022 to show that tracking error volatility (TEV) is characterised by reversion. Mutual funds with relatively high (low) TEV tend to reduce (increase) their TEV... -
College students’ loneliness and problematic mobile phone use: Mediation by fear of missing out
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Qishan Zheng --- Lingnan University, China Sisi Liu --- Lingnan University, China Jianhong Zheng --- , China Maojin Gu --- Lingnan University, China Wuming He --- , ChinaThis study examined the relationship between loneliness and problematic mobile phone use among university students, as well as the mediating role of fear of missing out in that relationship. College undergraduates (n = 233; female = 51.1%; first-year students =... -
Alexithymia and mobile phone addiction among college students: Mediation by boredom proneness and anxiety
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Huaibin Jiang --- Fujian Polytechnic Normal University, China Hanyu Liang --- Guizhou Medical University, China Bing Li --- Guizhou University, China Anxie Tuo --- Guizhou Medical University, ChinaThe current study explored the mediating role of boredom and anxiety on the relationship between alexithymia and mobile phone addiction among Chinese college students. Participants (n = 354; female = 49.7%, mean age = 19.30 years, SD = 1.28 years)... -
Some further remarks on characterized subgroups generated by modular simple density
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ayan Ghosh --- Jadavpur University, IndiaIn this short note we have constructed an uncountable tower of characterized subgroups using the notion of modular simple density [8] which subsequently gives the solution of Problem 2.15 [7] in a more general setting. -
Factorization in monoids by stratification of atoms and the Elliott problem
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Pedro A. García-Sánchez --- Universidad de Granada, España Ulrich Krause --- Universität Bremen, Germany David Llena --- Universidad de Almeria, EspañaIn an additive factorial monoid each element can be represented as a linear combination of irreducible elements (atoms) with uniquely determined coefficients running over all natural numbers. -
The relationships between socioeconomic status, dietary knowledge and patterns, and physical activity with adiposity in urban South African women
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Gudani Mukoma --- University of the Witwatersrand, South Africa Stephanie V Wrottesley --- University of the Witwatersrand, South Africa Juliana Kagura --- University of the Witwatersrand, South Africa Tolu Oni --- University of Cambridge, United Kingdom Lisa Micklesfield --- University of the Witwatersrand, South Africa Shane A Norris --- University of the Witwatersrand, South Africa -
Mobile phone addiction, self-control, physical exercise, and depression: A moderated mediation model
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Shejun Niu --- Zhengzhou Urban Construction Vocational College, ChinaThis study explored the role of self-control and physical exercise on the relationship between mobile phone addiction and depression. College students (n = 514, female = 56.8%, mean age = 18.43 years, SD = 0.72 years) completed the Mobile Phone... -
Morphological and physiological responses of Calobota sericea plants subjected to water limitation and subsequent rewatering
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois Müller --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa Lincoln Raitt --- University of the Western Cape, South Africa Lilburne Cyster --- University of the Western Cape, South Africa Samson Chimphango --- University of Cape Town, South Africa M Igshaan Samuels --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa Clement Cupido --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa J Stephen Boatwright --- University of the Western Cape, South AfricaCalobota sericea is a native legume of South Africa, confined to the water-limited rangelands, and it has recently been prioritised for additional characterisation regarding its pasture potential. In this study, we examined the growth characteristics of C. sericea under glasshouse... -
Effects of short-duration kraaling depend on initial conditions in a mesic grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Heidi-Jayne Hawkins --- , South Africa Nompendulo Mgwali --- , South Africa Susanne Vetter --- Rhodes University, South AfricaShort-duration overnight kraaling has been suggested as a tool for restoring degraded rangelands. However, the response of different plant functional types and communities to such intense livestock impact may vary depending on local context. We thus examined the effects of... -
On the coincidence of automorphism groups of finite p-groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Rohit Garg --- Govt. Ripudaman College, India Mandeep Singh --- Arya College, IndiaLet G be a finite non-abelian p-group, where p is a prime. Let γn (G) and Zn (G) respectively denote the nth term of the lower and upper central series of G, and let Ln (G) denote the nth absolute... -
Diversity of euglenoids in a drinking water source in Burkina Faso (West Africa): implications for sustainability and water quality
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Minata Ouattara --- University Joseph Ki-Zerbo, Burkina Faso Frédéric Zongo --- University Joseph Ki-Zerbo, Burkina Faso Bilassé Zongo --- University Joseph Ki-Zerbo, Burkina FasoEuglenophyta are a group of algae that occur in water polluted by organic matter, which makes them a good indicator for organic pollution. This study aimed to determine the diversity of Euglenophyta, the environmental conditions favourable to their development and... -
Dissipation of environmental DDT and its metabolites in selected rivers of south-western Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JK Nyaundi --- Kenya Marine and Fisheries Research Institute, Kenya SK Omasaki --- Kisii University, Kenya JM Babu --- Kenya Marine and Fisheries Research Institute, Kenya NM Mwirigi --- Kenya Marine and Fisheries Research Institute, Kenya R Omondi --- Kisii University, Kenya GA Mwayulj --- Great Lakes University of Kisumu, Kenya S Bassa --- National Fisheries Resources Research Institute (NaFIRRI), UgandaRivers are the main source of domestic and industrial water supplies in Kenya. In this study, water sampling was done at eight upstream sites in the Kuja River catchment, Kenya, between October 2016 and April 2017, specifically to test for... -
Spatio-temporal variation in phytoplankton community structure in backwaters of the Ketar River, central Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Yadesa Chibsa --- Wachemo University, Ethiopia Seyoum Mengistou --- Addis Ababa University, Ethiopia Demeke Kifle --- Addis Ababa University, EthiopiaThis study assessed the spatio-temporal dynamics of the phytoplankton community in backwaters of the Ketar River, central Ethiopia, in relation to water quality and macrophyte coverage. Phytoplankton samples and physicochemical information were collected at six sites along the river over... -
Long-term study of the drought impact on the phytoplankton concentration and assemblages in two water supply reservoirs in Namibia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Johannes Sirunda --- Namibia Water Corporation, Namibia Paul Oberholster --- University of the Free State, South Africa Gideon Wolfaardt --- Stellenbosch University, South Africa Christoff Truter --- Toronto Metropolitan University, Canada Sean van der Merwe --- University of the Free State, South AfricaRising temperatures and increased occurrences of droughts, brought on by climate change, are expected to affect reservoir water levels. We hypothesised that the decrease in reservoir volumes in dams with desert climates will favour the growth of phytoplankton biomass, measured... -
Case assessment and identification of pharmaceutical supply chain performance measures and metrics
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Asrat Mekonnen Gobachew --- University of Bremen, Germany Hans-Dietrich Haasis --- University of Bremen, Germany Eshetie Berhan --- Addis Ababa University, EthiopiaA lot of attention has been paid to performance measurement during the past few decades. There are several reasons for utilizing performance measurement in a business, but the most important one is that, when done right, it will increase productivity... -
Sensitivity simulation of sea surface temperature variability in coastal waters off East Africa in relation to the Indian Ocean Dipole
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MC Manyilizu --- The University of Dodoma, TanzaniaEast African coastal waters in the tropical western Indian Ocean experience strong seasonality which varies yearly, leading to the establishment of a prominent interannual Indian Ocean Dipole (IOD). This has a significant influence on regional and global socio-economic, climatic and... -
Assessing the impact of the COVID-19 restrictions on HIV testing services in Malawi: an interrupted time series analysis
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Barinaadaa Afirima --- , Malawi Ihoghosa O Iyamu --- University of British Columbia, Canada Zeena A Yesufu --- , Nigeria Emem Iwara --- , Nigeria David Chilongozi --- , Malawi Louis Banda --- , Malawi Emanuel Zenengeya --- , Malawi Chimwemwe Mablekisi --- , Malawi Blackson Matatiyo --- , Malawi Joseph Kuye --- , Nigeria Odo Michael --- , Liberia Andrew Gonani --- , Malawi Melchiade Ruberintwari --- , Mali Ngonidzashe Madidi --- , Malawi Edward Oladele --- , Zambia Chris Akolo --- , USABackground: Restrictions on public gatherings and movement to mitigate the spread of COVID-19 may have disrupted access and availability of HIV services in Malawi. We quantified the impact of these restrictions on HIV testing services in Malawi. -
Psychosocial support services to enhance well-being of orphaned and vulnerable learners in Eswatini early childhood centres and primary schools
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Patronella Bimha --- Institute of Distance Education, University of Eswatini, Maureen Nokuthula Sibiya --- Durban University of Technology, South AfricaIn Eswatini (formerly Swaziland), the increasing number of orphans and vulnerable children due to HIV/AIDS has spurred demand for psychosocial support services. When the Ministry of Education and Training assumed responsibility for delivering psychosocial support, educators were burdened with the... -
Sums of Fibonacci numbers that are perfect powers
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Volker Ziegler --- University of Salzburg, AustriaLet us denote by Fn the n-th Fibonacci number. In this paper we show that for a fixed integer y there exists at most one integer exponent a > 0 such that the Diophantine equation Fn + Fm = ya... -
On central automorphisms of finite p-groups of class 2
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: M. Shabani-Attar --- Payame Noor University, IranLet G be a finite p-group and let Aut c (G) be the group of all central automorphisms of G. Let be the set of all central automorphisms of G fixing Z(G) elementwise. For a finite p-group of class 2,... -
On finite Sylow tower and σ-tower groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jinzhuan Cai --- Hainan University, P.R. China Inna N. Safonova --- Belarusian State University, Belarus Alexander N. Skiba --- Francisk Skorina Gomel State University, Belarus Zhigang Wang --- Hainan University,In this paper, G is a finite group and σ a partition of the set of all primes ℙ, that is, σ = {σ i | i ∈ I}, where ℙ = ⋃ i∈I σ i and σ i ∩... -
A sufficient condition for planar graphs to be DP-4-colorable
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ziwen Huang --- Yichun University, China Jianqing Ma --- Wuhan University of Science and Technology, China Xiaoxia Zhang --- Xinyang Normal University, ChinaIn 2017, Dvořák and Postle introduced DP-coloring (known as correspondence coloring) as a generalization of list coloring. Recently, a lot of attention has been put on sufficient conditions for planar graphs to be DP-4-colorable. Liu et al. [17] proved that... -
Anuran diversity in a West African Valley
Item type: Journal Article • Journal: African Zoology • Authors: Houénafa Chrysostome Aimé Gansa --- Unit of Aquaculture Research and Fisheries Management (URAGeP), Laboratory of Fisheries and Animal Sciences (LaSAH), National University of Agriculture (UNA), Republic of Benin Hyppolite Agadjihouèdé --- University of Abomey-Calavi, Republic of Benin Mahugnon Benjamin Hounkanrin --- Unit of Aquaculture Research and Fisheries Management (URAGeP), Laboratory of Fisheries and Animal Sciences (LaSAH), National University of Agriculture (UNA), Republic of BeninAnurans are subject to strong anthropic pressures in Benin, as in most of the West African countries, due to their socio-economic and environmental importance. To protect these organisms and to gather basic knowledge, an anuran biodiversity study was conducted in... -
Empowering women in South African law enforcement: Developing authenticity as best-self
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Rochelle Jacobs --- University of South Africa, South Africa Antoni Barnard --- University of South Africa, South AfricaThis hermeneutic phenomenological study explored the authenticity experiences of South African women in law enforcement from a best-self perspective. Narrative interviews were conducted with 12 women from police and traffic services, aged between 26 and 55 (25% black, 58% mixed... -
Limnological features and water-quality changes of two Ethiopian Rift Valley lakes, Lake Abaya and Lake Chamo
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Dagne --- National Fishery and Aquatic Life Research Center, Ethiopia H Tadesse --- National Fishery and Aquatic Life Research Center, Ethiopia K Teshome --- National Fishery and Aquatic Life Research Center, EthiopiaWe conducted a study in Lake Abaya and Lake Chamo, the two largest Ethiopian Rift Valley lakes, between 2016 and 2019, to evaluate their limnological features and infer longer-term changes in some water-quality parameters. Data generated through in situ measurements... -
Relationship between sediment grain sizes and macroinvertebrate distribution along the Isiukhu River, western Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Emmanuel Mzungu --- Masinde Muliro University of Science and Technology, Kenya Anthony W Sifuna --- Masinde Muliro University of Science and Technology, Kenya William A Shivoga --- Masinde Muliro University of Science and Technology, KenyaThe current study investigated the relationship between sediment grain sizes and macroinvertebrate distribution along the Isiukhu River, a tropical stream in western Kenya. Ten sites in total were selected from the upstream, midstream and downstream areas. Sampling of sediments and... -
Role of the Lethabo Weir in altering the phytoplankton community structure of the Vaal River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Janse van Vuuren --- North-West University, South Africa A Swanepoel --- , South AfricaDuring 2012, aerial photographs of the Vaal River, South Africa, showed differences in water colour on either side of the Lethabo Weir. Water upstream of the weir was muddy brown, while water downstream was olive-green. Physical and chemical analyses indicated... -
The influence of grass competition and soil moisture on the growth and phenology of Karoo shrubs in the Eastern Upper Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lisa Hebbelmann --- , South Africa Timothy G O’Connor --- , South Africa Justin CO du Toit --- Grootfontein Agricultural Development Institute, South AfricaRainfall in the Nama-Karoo is sporadic and a plant’s ability to access and utilise available soil moisture will determine its ability to persist in the system and to successfully recruit. When summer rainfall in the Eastern Karoo increases, grassiness increases... -
Depth of C(X)-modules
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: F. Azarpanah --- Shahid Chamran University of ahvaz, Iran A.A. Hesari --- Shahid Chamran University of ahvaz, Iran A.R. Salehi --- Petroleum University of Technology, IranIt is shown that the depth of every module over C(X), the ring of all real valued continuous functions on a topological space X, is at most 1. This result is proved for modules over rings of a much more... -
On the eigenvalues of Laplacian ABC-matrix of graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bilal Ahmad Rather --- United Arab Emirates University, UAE Hilal A. Ganie --- , India Xueliang Li --- Nankai University, ChinaFor a simple graph G, the ABC-index is a degree based topological index and is defined as -
The morphophysiological mechanisms of light-induced net primary production of Amazonian tree species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Victor Alexandre Hardt Ferreira dos Santos --- , Brazil Ana Flávia Monteiro de Souza --- Federal University of Amazonas, Brazil Bruna de Oliveira dos Santos --- Federal University of Amazonas, Brazil Adriana Grandis --- University of São Paulo, Brazil Marciel José Ferreira --- Federal University of Amazonas, BrazilWe investigated the morphophysiological mechanisms indicative of resource uses behind net primary production in seedlings of three valuable forest species of socio-economic value in the Amazon:mahogany (Swietenia macrophylla), Brazil nut (Bertholletia excelsa) and Laurel (Cordia alliodora). The hypotheses tested were:... -
Fine-scale variation reveals high structure and floristic heterogeneity in dry forests of the Cerrado
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Frederico Augusto Guimarães Guilherme --- Instituto de Biociências, Universidade Federal de Jataí, Brasil Deivid Lopes Machado --- Universidade Federal de Jataí, Brasil Gabriel Eliseu Silva --- Universidade Federal de Jataí, Brasil Natanael Moreira Nascimento --- Universidade Federal de Jataí, Brasil Gustavo Luz Ferreira --- Universidade Federal de Jataí, Brasil Kaila de Assis Ressel Pereira --- Universidade Federal de Jataí, Brasil Ana Paula de Souza --- Instituto de Biociências, Universidade Federal de Jataí, Brasil Pollyana de Godoy Borges --- Universidade Federal de Jataí, Brasil Laura Rezende Souza --- Universidade Federal de Jataí, Brasil James Dean Leal Rocha --- Instituto de Biociências, Universidade Federal de Jataí, Brasil Christiano Peres Coelho --- Instituto de Biociências, Universidade Federal de Jataí, Brasil Everton Alves Maciel --- Instituto de Biociências, Universidade Federal de Jataí, Brasil Wendy Carniello Ferreira --- Universidade Federal de Jataí, Brasil Marlon Zortéa --- Instituto de Biociências, Universidade Federal de Jataí, Brasil Steffan Eduardo Silva Carneiro --- Universidade Federal de Jataí, BrasilThis study aimed to compare the floristic and tree structure of two dry forests patches located in a forest remnant encompassed in Cerrado biome, south Goiás state, Brazil. In semideciduous (SF) and deciduous (DF) dry forests, we allocated 25 permanent... -
Assessment of genetic and morphological differentiation among populations of the Diederik Cuckoo Chrysococcyx caprius
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Rae M Smith --- South African National Biodiversity Institute (SANBI), South Africa Desiré L Dalton --- South African National Biodiversity Institute (SANBI), South Africa Monica Mwale --- South African National Biodiversity Institute (SANBI), South Africa Lisa J Nupen --- South African National Biodiversity Institute (SANBI), South Africa Chantelle Pretorius --- South African National Biodiversity Institute (SANBI), South Africa Jamie Bojko --- Teesside University, United Kingdom Kim Labuschagne --- South African National Biodiversity Institute (SANBI), South Africa Isa-Rita M Russo --- Cardiff University, United Kingdom Samuel T Osinubi --- FitzPatrick Institute of African Ornithology, University of Cape Town, South AfricaThe Diederik Cuckoo Chrysococcyx caprius is an African species widely distributed south of the Sahara, which migrates seasonally between breeding and nonbreeding sites. It is currently unknown whether the species consists of a single panmictic population or if it is... -
New Pleistocene avian ichnosites on South Africa’s Cape south coast
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Charles W Helm --- Nelson Mandela University, South Africa Martin G Lockley --- University of Colorado Denver, United States Andrew S Carr --- University of Leicester, United Kingdom Hayley C Cawthra --- Nelson Mandela University, South Africa Jan C De Vynck --- Nelson Mandela University, South Africa Mark G Dixon --- Nelson Mandela University, South Africa Pieter-Jan Gräbe --- Nelson Mandela University, South Africa Renée Rust --- Nelson Mandela University, South AfricaTwelve new avian ichnosites have been identified on South Africa’s Cape south coast, adding to the 29 sites previously identified. More than half of these 41 avian ichnosites are found along a 9-km stretch of coastline east of Still Bay... -
Leveraging defence into offence: Enhancing absolute and risk-adjusted equity returns with tail risk management overlays
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Bruno Schwalbach --- University of the Witwatersrand, South Africa Christo Auret --- University of the Witwatersrand, South AfricaResearch has shown that tail risk hedging using explicit option purchases and trend-following effectively mitigate equity tail risk. This paper demonstrates that these defensive qualities can be leveraged into offence: overlaying a two-pronged tail risk management strategy that employs both... -
Bioprospecting for active compounds: impact of milling, extract fractions and freeze-drying on targeted terpene compounds of Helichrysum odoratissimum (L.) Sweet
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Neliswa A. Matrose --- Agricultural Research Council (ARC) Infruitec-Nietvoorbij, South Africa Zinash A. Belay --- Agricultural Research Council (ARC) Infruitec-Nietvoorbij, South Africa Obikeze Kenechukwu --- University of the Western Cape, South Africa Lucky Mokwena --- Stellenbosch University, South Africa Oluwafemi James Caleb --- Stellenbosch University, South AfricaThis study investigated the effect of processing and freeze-drying on targeted volatile compounds (terpenes) of Helichrysum odoratissimum (L.) Sweet. Air-dried plant material was processed to obtain: (i) roughly ground leaves and stems (RGMHO); (ii) finely ground leaves and stems (FGMHO);... -
Portrait of an ethnography during pandemic times: Bagamoyo remote reconstruction and the (un)Freire of literacy policies in Mozambique
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Xénia de Carvalho --- University Institute of Lisbon, PortugalSince 2019, I have been engaged in remote ethnography about the reconstruction of the beginning of the language and literacy policies developed by the Frelimo School in Bagamoyo (1970–1975), Tanzania. I entered the field based on previous ethnographic fieldwork in... -
Ethnography, calamities and war: Mozambique 2000
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Fernando Florêncio --- University of Coimbra, PortugalIn this article I draw on personal experience to discuss the ways of doing ethnography in a context of crisis. In February 2000, when I started fieldwork for my PhD thesis in the central region of Mozambique, the country was... -
Beauty and materiality: Subjective social class mediation of self-perceived physical attractiveness and materialism in Chinese college students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Baoyan Yang --- Northwest Normal University, China Xiaoyue Zhao --- Northwest Normal University, China Mengmeng Zhu --- Northwest Normal University, China Yiting Wang --- Northwest Normal University, China Qiaoqiao Du --- Northwest Normal University, ChinaThis study examines the relationship between self-perceived physical attractiveness and materialism, and the mediating role of subjective social class in that relationship. Participants were 375 Chinese college students (female = 79%; sophomore = 29%; mean age = 21.99; SD =... -
Homophilic social networks and school adjustment among primary school pupils: Results and implications from a Zimbabwean study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Edwin Simbarashe Mpofu --- University of Zimbabwe, Zimbabwe Maximus Monaheng Sefotho --- University of Johannesburg, South AfricaSocial network patterns were explored among Zimbabwean rural school pupils to determine their peer preferences and statuses. Participants were 173 school pupils attending grades 4–6 in a rural school in Zimbabwe (76 boys; 97 girls; age range 9 years to... -
Understanding the effects of climate change on Southern Ocean ecosystems
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CD McQuaid --- Rhodes University, South AfricaUnderstanding the future of Southern Ocean ecosystems requires approaches at micro to macro scales. The Southern Ocean has experienced both top-down and bottom-up perturbations driven by man. The removal of whales and finfish was a top-down disruption, removing enormous levels... -
Lax comma categories of ordered sets
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Maria Manuel Clementino --- University of Coimbra, Portugal Fernando Lucatelli Nunes --- Universiteit Utrecht, NederlandLet Ord be the category of (pre)ordered sets. Unlike Ord/X , whose behaviour is well-known, not much can be found in the literature about the lax comma 2-category Ord//X . In this paper we show that the forgetful functor Ord//X... -
Epimorphisms and closure operators of categories of semilattices
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: D. Dikranjan --- Università degli Studi di Udine, Italy A. Giordano Bruno --- Università degli Studi di Udine, Italy N. Zava --- Institute of Science and Technology Austria (ISTA),Motivated by a problem posed in [10], we investigate the closure operators of the category SLatt of join semilattices and its subcategory SLatt O of join semilattices with bottom element. In particular, we show that there are only finitely many... -
Topogenous orders and related families of morphisms
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: David Holgate --- University of the Western Cape, South Africa Minani Iragi --- Brno University of Technology, Czech RepublicIn a category with a proper ()-factorization system, we study the notions of strict, co-strict, initial and final morphisms with respect to a topogenous order. Besides showing that they allow simultaneous study of four classes of morphisms obtained separately with... -
On mixed metric dimension in subdivision, middle, and total graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ali Ghalavand --- Ferdowsi University of Mashhad, Iran Sandi Klavžar --- University of Ljubljana, Slovenia Mostafa Tavakoli --- Ferdowsi University of Mashhad, Iran Ismael G. Yero --- Universidad de Cádiz, SpainLet G be a graph and let S(G), M(G), and T(G) be the subdivision, the middle, and the total graph of G, respectively. Let dim(G), edim(G), and mdim(G) be the metric dimension, the edge metric dimension, and the mixed metric... -
The significance of the contributions of congruences to the theory of connectednesses and disconnectednesses for topological spaces and graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Stefan Veldsman --- Nelson Mandela University, South AfricaThis is a survey of some of the consequences of the recently introduced congruences on the theory of connectednesses (radical classes) and disconnectednesses (semisimple classes) of graphs and topological spaces. In particular, it is shown that the connectednesses and disconnectednesses... -
A generalization of the equation (2 k − 1) (3 l − 1) = 5 m − 1
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Nurettin Irmak --- Konya Technical University, TurkeyRecently, Luca and Szalay solved the equation -
Understanding the uptake of HIV testing among women in Liberia: the role of female genital mutilation/cutting
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Daniel Amoak --- Western University, Canada Nancy Osei-Kye --- Western University, Canada Florence W. Anfaara --- Western University, Canada Yujiro Sano --- Nipissing University, Canada Roger Antabe --- University of Toronto Scarborough, Canada Isaac Luginaah --- Western University, CanadaPast studies show that the processes of female genital mutilation/cutting (FGM/C) on women can increase their susceptibility to HIV infection. This is because genital tears or ruptures, scars and wounds from FGM/C may expose survivors to heightened risks of contracting... -
Development and testing of a nutrition education tool on iron supplementation for pregnant women
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: P Mahundi --- University of KwaZulu-Natal, South Africa K Pillay --- University of KwaZulu-Natal, South Africa N Wiles --- University of KwaZulu-Natal, South Africa -
Coping strategies and mental health of adolescents impacted by parental HIV and AIDS in rural South Africa
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Comfort Asanbe --- College of Staten Island, City University of New York, USA Maretha Visser --- University of Pretoria, South Africa Anne-Gloria Moleko --- University of Pretoria, South Africa Catherine Makwakwa --- , South AfricaObjective: The study explored whether orphanhood status as well as coping strategies predicted mental health outcomes in orphans and vulnerable adolescents who participated in an NGO-supported programme in rural South Africa. -
The use of dolphins at Melka Excelsior Dolphin and Wildlife Resort in Lovina, Bali, Indonesia: a study of visitor experiences and ethical implications through netnographic research
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Rodney Westerlaken --- NHL Stenden University of Applied Sciences, The NetherlandsThe closure of Melka Excelsior Dolphin and Wildlife Resort in Lovina, Bali, in Indonesia was prompted by the confiscation of its dolphins and mounting pressure from animal welfare advocates, marking a pivotal moment in the discourse surrounding the use of... -
Interpersonal sensitivity, smartphone addiction, connectedness to nature and life satisfaction among college students: A moderated mediation model
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: --- Beijing Forestry University, China --- Hebei Normal University, China --- Beijing Forestry University, China --- Beijing Forestry University, ChinaThis study explored the relationship between interpersonal sensitivity and life satisfaction among college students, the mediating effect of smartphone addiction, and the moderating effect of connectedness to nature. A total of 702 college students (453 females, Meanage = 19.60 years,... -
Incident and persistent poor sleep quality and associated factors among a rural ageing population in South Africa: A longitudinal study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: --- University of the Free State, South AfricaPoor sleep quality (PSQ) is common among ageing adults, while the correlates of poor sleep quality among older adult populations are less well understood. The study utilised data from the South African 4-year longitudinal study on Health and Ageing in... -
Rooting potential of the ‘vleitee’ honeybush (Cyclopia subternata) as affected by growth season and the manipulation of stock plant characteristics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: --- Directorate Plant Sciences, South Africa --- Stellenbosch University, South Africa --- Stellenbosch University, South Africa --- Stellenbosch University, South AfricaTo ensure a high-quality, sustainable supply of South African indigenous honeybush (Cyclopia spp.) tea to domestic and international markets, a shift from wild harvesting practices to true-to-type clonal material is required. This study investigated the impact of stock plant rejuvenation... -
Some physical properties of a sandy clay loam humic soil under native forest and sugarcane in northern KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: --- School of Agricultural, South Africa --- School of Agricultural, South Africa --- School of Agricultural, South AfricaThe conversion of native forest land to commercial farming can have profound effects on soil physical properties. This study compared bulk density (BD), saturated hydraulic conductivity (Ks) and other physical properties of a sandy loam humic soil under native forest... -
Fine-scale drivers of extinction risk: tadpole occupancy dynamics of the Table Mountain Ghost Frog (Heleophryne rosei)
Item type: Journal Article • Journal: African Zoology • Authors: --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South Africa --- University of Cape Town, South Africa --- , South Africa --- , South AfricaOver the last four decades much progress has been made towards recognising causes of global amphibian declines, but knowledge of fine scale drivers, particularly for specialised species, remains poor, inhibiting conservation effectiveness. The case of the Table Mountain Ghost frog... -
Marine macroalgae of the Agulhas Marine Province of South Africa: biodiversity, exploitation and potential for aquaculture
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JJ Bolton --- University of Cape Town, South Africa CD McQuaid --- Rhodes University, South AfricaThe Agulhas Marine Province (AMP) extends along most of the south coast of South Africa, from Cape Agulhas to the vicinity of the Mbashe River mouth in the Eastern Cape Province, and has its own distinctive warm-temperate seaweed flora, with... -
Geographical and seasonal patterns in the diet of Cape fur seals Arctocephalus pusillus pusillus in Namibia, based on extensive scat analyses
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DN Mwaala --- University of Namibia, Namibia MR Wilhelm --- University of Namibia, Namibia SP Kirkman --- Fisheries and the Environment (DFFE): Branch Oceans and Coasts, South Africa J-P Roux --- Ministry of Fisheries and Marine Resources, NamibiaNamibia's population of Cape fur seals Arctocephalus pusillus pusillus is a major constituent of top predator biomass in the northern Benguela upwelling system. Understanding their diet is key to comprehending their role in the ecosystem and potential drivers of recent... -
Associative nitrogen fixation could be common in South African mesic grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: --- University of KwaZulu-Natal, South Africa --- University of KwaZulu-Natal, South Africa --- Institute for Commercial Forestry Research, South AfricaNon-symbiotic nitrogen-fixing bacterial diazotrophs closely associated with the roots of grasses probably contribute most of the new nitrogen acquired to sustain productive natural grasslands, yet their ecology is poorly understood, especially in southern Africa. We looked for genetic evidence, using... -
Plumage dimorphism and moult patterns of weaverbirds – a review
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: H-Dieter Oschadleus --- University of KwaZulu-Natal, South Africa Staffan Andersson --- University of Gothenburg, SwedenThe colourful plumages of weaverbirds (family Ploceidae, with 118 species recognised) provide a well-known and in part iconic showcase of sexual selection, with widespread sexual dimorphism (93 species) as well as seasonal dimorphism (62 species). The tremendous diversity in both... -
Primary moult in the annual cycle of adult African Oystercatchers Haematopus moquini
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Taylyn C Bate --- University of Cape Town, South Africa Peter G Ryan --- University of Cape Town, South Africa Les G Underhill --- University of Cape Town, South AfricaAfrican Oystercatchers Haematopus moquini are sedentary, intertidal foraging birds, range-restricted to Namibia and South Africa. Their annual cycle has two components: breeding and moult. The Underhill–Zucchini model estimated a primary moult duration of 154 days, and mean start and completion... -
Equity of the HIV epidemic response in 13 African countries
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Gary Gaumer --- Brandeis University, USA V. S. Senthil Kumar --- Brandeis University, USA William Crown --- Brandeis University, USA Monica Jordan --- Brandeis University, USA Clare Hurley --- Brandeis University, USA Maya Subramanian --- Brandeis University, USA A. K. Nandakumar --- Brandeis University, USAFor over 25 years, new programs to attempt to stem the HIV epidemic have been developed in Africa by country governments as well as external donors. These programs and activities have built and operated facilities, trained clinicians, financed drugs and... -
Tree diversity, vegetation structure and management of mangrove systems on Viti Levu, Fiji Islands
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ashik Rubaiyat --- University of Göttingen, Germany Nicholas Rollings --- The University of the South Pacific, Fiji Islands Stephen Galvin --- The University of the South Pacific, Fiji Islands Ralph Mitloehner --- University of Göttingen, Germany Sohag Miah --- University of Göttingen, Germany Hans Juergen Boehmer --- The University of the South Pacific, Fiji IslandsMangrove forest ecosystems are critical natural resources, particularly in the South Pacific region. Mangrove forests in Viti Levu, Fiji’s main island, are threatened by infrastructure development activities and population growth. Consequently, the protection and restoration of mangrove forest are of... -
Genetic variability of Tachigali vulgaris trees based on seed morphophysiological traits
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Noemi Vianna Martins Leão --- , Brazil Sérgio Heitor Sousa Felipe --- Universidade Estadual do Maranhão, Brazil Ricardo Gallo --- Universidade Federal Rural de Pernambuco, Brazil Elizabeth Santos Cordeiro Shimizu --- , BrazilTachigali vulgaris is a tree with high potential for energy purposes in Brazil. However, there is little information about genetic variability that can be applied to plant breeding. Here, we quantified genetic variability based on biometric and emergence traits of... -
Delayed rooting hormone application and stem cutting collection time improved Flacourtia indica rooting ability and root growth
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Simon A Mng’omba --- Lilongwe University of Agriculture and Natural Resources, MalawiFlacourtia indica (Burm.f.) Merr. is an important fruit and medicinal tree in Southern Africa. Efforts to achieve early fruiting have failed with juvenile propagules (planting materials) such as seed. Assessing rooting ability of mature (fruit bearing) F. indica stem cuttings... -
Disrupting self-censorship, inventing public space through interactive performances in Luanda, Angola
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Chloé Buire --- , FranceThis article analyses a series of cultural events organised in Luanda, Angola, in 2021–2022 by an artistic collective called the Vosi Yetu Project. These open-mike sessions promoting freedom of expression are analysed as carnivalesque moments redistributing the norms of who... -
A meeting with gardenia: an ethnographic exploration of multispecies relationships and space construction in Kirstenbosch National Botanical Garden
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: James Granelli --- University of Cape Town, South AfricaIn an age of climate and ecological breakdown, questions of how we relate to the natural world and the more-than-human beings around us are more important than ever. This ethnography seeks to bring these questions to the Kirstenbosch National Botanical... -
Validation of the generic name Prescottiella gen. nov. (Desmidiales, Zygnematophyceae): a rare African desmid
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Sanet Janse van Vuuren --- North-West University, South Africa Anatoliy Levanets --- North-West University, South AfricaPrescottiella sudanensis is a rare, asymmetrical desmid currently known from only a few countries in equatorial Africa. During the present study, P. sudanensis cells were found in water samples from Vogel Pan located in the far north-eastern side of Namibia,... -
Water quality monitoring and measuring physicochemical parameters using wireless sensor networks
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Satyanarayana Murthy --- , India SF Ahamed --- , IndiaIn a world grappling with the dire consequences of poor sanitation and inadequate water conditions, there is an urgent need for a comprehensive solution. The staggering statistics of over 400 million affected cases and 15–25 million lives lost worldwide underscore... -
Analysis of freshwater diatom deformities in the Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Holmes --- Nelson Mandela University, South Africa EE Campbell --- Nelson Mandela University, South Africa M de Wit --- Africa Earth Observatory Network (AEON) – Earth Stewardship Science Research Institute (ESSRI) Nelson Mandela University, South Africa JC Taylor --- North-West University, South AfricaSeveral studies regarding the effects of excess nutrients and metals as possible causes of deformities found in diatom cells have been conducted in Europe, North America and Australia. This is the first study in South Africa which catalogued and analysed... -
Effect of plant spacing and cutting intensity on the morphology and productivity of forage cactus [Opuntia stricta (Haw.) Haw.]
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Claudia Maciel Ferreira --- Universidade Federal Rural de Pernambuco, Brazil Marcio Vieira da Cunha --- Universidade Federal Rural de Pernambuco, Brazil Mércia Virginia Ferreira dos Santos --- Universidade Federal Rural de Pernambuco, Brazil Alexandre Carneiro Leão de Mello --- Universidade Federal Rural de Pernambuco, Brazil Djalma Cordeiro dos Santos --- Instituto Agronômico de Pernambuco, Brazil Maria da Conceição Silva --- Instituto Agronômico de Pernambuco, Brazil Janerson José Coelho --- Universidade Federal Rural de Pernambuco, BrazilThe forage cactus cultivar Mexican elephant ear (MEE) [Opuntia stricta (Haw.) Haw.] has been widely used in the semi-arid of Brazil because of its resistance to carmine mealybug. Therefore, it is necessary to establish planting and harvesting management strategies for... -
Solutions of an anisotropic elliptic problem involving nonlinear terms
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A. Razani --- Imam Khomeini International University, Iran T. Soltani --- Imam Khomeini International University, IranUsing variational methods, the existence and multiplicity of weak solutions for the following Neumann anisotropic problem -
Hospitality in volunteer engagement: navigating complexities in residential care facilities for children
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Rodney Westerlaken --- NHL Stenden University of Applied Sciences, The NetherlandsThis study investigates the multifaceted realm of volunteer engagement in orphanages and residential care facilities for children, as places of hospitality towards volunteers, in low- and middle-income countries. While the positive outcomes of such engagements, including assistance, economic contributions and... -
A rigid Riesz space
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A.W. Wickstead --- Queen’s University Belfast, , Northern Ireland, UKWe give an example of an Archimedean Riesz space on which every automorphism is a strictly positive multiple of the identity. -
Distribution and site fidelity of four endemic catshark species in Walker Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TL Johnson --- , South Africa JC de Bresser --- , South Africa E Cottrant --- , South Africa NJ Drobniewska --- , South Africa TG Paulet --- , South Africa LG Underhill --- University of Cape Town, South AfricaCatsharks (family Scyliorhinidae) and the recently reclassified deepwater catsharks (family Pentanchidae) are two of the largest families of elasmobranchs and include species that function as important mesopredators in almost all marine ecosystems. This study focuses on four species endemic to... -
Thermal tolerances of littorinid snails from temperate and subtropical South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CD McQuaid --- Rhodes University, South Africa TG Matumba --- Rhodes University, South AfricaEnvironmental temperature affects ectotherm performance and fitness because physiological performance increases up to a sublethal optimum temperature; this is not fixed, but depends on the species and individual history. We explored the influence of species identity, size and thermal history... -
Advertisement call description of the exceedingly rare Phrynomantis affinis (Anura: Microhylidae), with comparisons to P. bifasciatus and range extensions for both species
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Francois S Becker --- National Museum of Namibia, Namibia Alan Channing --- North-West University, South AfricaDespite a relatively broad distribution in Africa, the Spotted Rubber Frog, Phrynomantis affinis, is extremely rarely encountered. Only 18 specimens from 12 localities have been collected with a few additional observations recorded. Virtually nothing of the species’ natural history is... -
Distribution, habitat and vulnerability to climate change of the Endangered Leptopelis xenodactylus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Kirsty J. Kyle --- North-West University, South Africa Louis H. Du Preez --- North-West University, South Africa James Harvey --- 41 Devonshire Avenue, South Africa Adrian J. Armstrong --- Centre for Functional Biodiversity, School of Life Sciences, University of KwaZulu-Natal, South AfricaLeptopelis xenodactylus is a little-known, Endangered species of frog that is thought to be endemic to the KwaZulu-Natal Province of South Africa. In an effort to determine the distribution of this species more accurately, a working species distribution model was... -
A new species of gracile blind snake in the genus Letheobia (Squamata: Scolecophidia: Typhlopidae) from Sagalla Hill, south-eastern Kenya
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Patrick K Malonza --- National Museums of Kenya, KenyaThe members of the typhlopid Letheobia pallida group are characterised by having a divided or split ocular scale. Letheobia wrayi sp. nov., differs from all other members of this group by having a low mid-dorsal scale count of 355 (other... -
A new bullfrog from southern Africa (Pyxicephalidae, Pyxicephalus Tschudi, 1838)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Louis H du Preez --- North-West University, South Africa Edward C Netherlands --- North-West University, South Africa Mark-Oliver Rödel --- , Germany Alan Channing --- North-West University, South AfricaFour species of African bullfrogs are currently recognised. We describe a new species from southern Africa, which can be distinguished on the basis of morphology, advertisement call and DNA sequences. Morphologically it differs from other bullfrogs by a combination of... -
Associations between nutrition knowledge and obesity-related attitudes and physical activity among young adults from Kenya, South Africa, and the United Kingdom
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Siphiwe N Dlamini --- University of the Witwatersrand, South Africa Asanda Mtintsilana --- University of the Witwatersrand, South Africa Witness Mapanga --- University of the Witwatersrand, South Africa Ashleigh Craig --- University of the Witwatersrand, South Africa Shane A Norris --- University of the Witwatersrand, South Africa -
Fixed points of principal E 6-bundles over a compact algebraic curve
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Álvaro Antón-Sancho --- Fray Luis de Leon University College of Education, Catholic University of Ávila, SpainLet X be a compact algebraic curve of genus g ≥ 2. The nontrivial outer automorphism σ of the complex Lie group E 6 acts on the moduli space M(E 6) of principal E 6-bundles over X , and this... -
Double total domination in the generalized lexicographic product of graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Abel Cabrera-Martínez --- Universidad de Córdoba, Spain Ismael Ríos Villamar --- Universidad Autónoma de Guerrero, Mexico Juan M. Rueda-Vázquez --- Universidad de Córdoba, Spain José M. Sigarreta Almira --- Universidad Autónoma de Guerrero, MexicoLet G be a graph of minimum degree at least two. A set D ⊆ V(G) is said to be a double total dominating set of G if |N (v) ∩ D| ≥ 2 for every vertex v ∈ V(G)... -
Difference in acoustic responses to urbanisation in two African passerines
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Dickson Anobie Matthew --- AP Leventis Ornithological Research Institute (APLORI), Nigeria Samuel Tertse Ivande --- AP Leventis Ornithological Research Institute (APLORI), Nigeria Ulf Ottosson --- AP Leventis Ornithological Research Institute (APLORI), Nigeria Samuel Temidayo Osinubi --- University of Cape Town, South AfricaModification of ecosystems as a consequence of urbanisation alters natural habitat structures and soundscapes, creating constraints for vocal communication in animals. Birds are able to adjust their vocalisation to the prevailing acoustic features of their habitat. As such, their sounds... -
On sums of two Fibonacci numbers that are powers of numbers with limited hamming weight
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ingrid Vukusic --- University of Salzburg, Austria Volker Ziegler --- University of Salzburg, AustriaIn 2018, Luca and Patel conjectured that the largest perfect power representable as the sum of two Fibonacci numbers is 38642 = F 36 + F 12. In other words, they conjectured that the equation -
Lax pullback complements in partial morphism categories
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: S.N. Hosseini --- Mahani Mathematical Research Center, Shahid Bahonar University of Kerman, Iran L. Yeganeh --- Mahani Mathematical Research Center, Shahid Bahonar University of Kerman, IranThe goal of this article is to characterize the lax pullback complement of a given partial morphism along a total morphism, in an -partial morphism category, where is an exponentiable stable system. To achieve this, we first show that if... -
The number of distinguishing colorings of a Cartesian product graph
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Saeid Alikhani --- Yazd University, Iran Mohammad H. Shekarriz --- Yazd University, IranA vertex coloring is called distinguishing if the identity is the only automorphism that can preserve it. The distinguishing threshold θ(G) of a graph G is the minimum number of colors k required that any arbitrary k-coloring of G is... -
Of vaccines, biopower, subjects and governmentality: an ethnographic enquiry into the Zimbabwean Covid-19 vaccination drive
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Talent Moyo --- Midlands State University, ZimbabweThe article highlights the politics of the Covid-19 vaccination drive in Zimbabwe. It interrogates questions of individual agency and institutional power in the administration of the vaccine. It is framed within Foucauldian scholarship, particularly that concerning the role of biopower,... -
New data on the clupeoids of lakes Mai-Ndombe and Tumba, western Democratic Republic of the Congo, using an integrated approach combining morphology and barcoding
Item type: Journal Article • Journal: African Zoology • Authors: Bo Delling --- , Sweden Norbert Lingopa Zanga --- Institut Supérieur de Pêche (ISPê), Congo Michael Norén --- , SwedenMorphological and molecular comparisons of clupeoid fishes in lakes Tumba and Mai-Ndombe in the Congo Basin revealed that a large-sized form of a common species in Lake Mai-Ndombe had not been distinguished from the small-sized endemic Mai-Ndombe dwarf sprat Nannothrissa... -
Species diversity and distribution-pattern determinants of African rivulines (Cyprinodontiformes: Nothobranchiidae) in rainforest streams of southern Cameroon
Item type: Journal Article • Journal: African Zoology • Authors: FD Messu Mandeng --- Higher Teacher’s Training College (ENS), University of Yaoundé I, Cameroon CF Bilong Bilong --- University of Yaoundé I, Cameroon JF Agnese --- University of Montpellier (CNRS, IRD, EPHE), FranceUnderstanding the community structure and ecology of fish populations in rainforest streams is a prerequisite for any actions towards their exploitation, management or conservation. We examined the community structure and species diversity of nothobranchiids (African rivulines) in rainforest streams of... -
Molecular characterisation and phylogeny of two nematode parasites recovered from the amphibian host Schlerophrys regularis sampled in Lagos metropolis, Nigeria
Item type: Journal Article • Journal: African Zoology • Authors: Okeagu Martin Okechukwu --- University of Lagos, Nigeria Akinsanya Bamidele --- University of Lagos, Nigeria Fadipe Ojuolape Temitope --- Federal Institute of Industrial Research, Nigeria Njoku Ifeoma Faith --- Federal Institute of Industrial Research, Nigeria Adekoya Olajide Khalid --- University of Lagos, Nigeria Akadiri Oladimeji Olalekan --- Federal Institute of Industrial Research, Nigeria Aisien Martins --- University of Benin, NigeriaResearch on amphibian parasites has been on the increase because of the noticeable decline of amphibians. Studies on these parasites have been limited to their prevalence and infection patterns, and there is still a dearth of knowledge on the phenotypic... -
Associations between mild depression and anxiety and physical inactivity among school-going Ugandan adolescents aged 14 to 17 years
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: James Mugisha --- Kyambogo University, Uganda Tine Van Damme --- , Belgium Davy Vancampfort --- , BelgiumObjective: The aim of this cross-sectional study was to investigate associations between physical activity levels and emotional and behavioural problems in school-going adolescents aged 14 to 17 years in Uganda. -
On the difference graph of power graphs of finite groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jitender Kumar --- Birla Institute of Technology and Science Pilani, India Ramesh Prasad Panda --- VIT-AP University, India Parveen --- Birla Institute of Technology and Science Pilani, IndiaThe power graph of a finite group G is the simple undirected graph with vertex set G whose two vertices are adjacent if one is a power of the other. The enhanced power graph of a finite group G is... -
Local and 2-local automorphisms of solvable Leibniz algebras with abelian and model nilradicals
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Iqboljon Karimjanov --- Saint-Petersburg State University, Russia Sardorbek Umrzaqov --- Andijan State University, Uzbekistan Bakhtiyor Yusupov --- V.I. Romanovskiy Institute of Mathematics, Uzbekistan Academy of Sciences, UzbekistanIn the paper, we describe the automorphisms on the solvable Leibniz algebras with the model or abelian nilradicals, whose complementary spaces are equal to two and one, respectively. We show that any local automorphism on a solvable Leibniz algebra with... -
Argument estimates associated with meromorphic close-to-starlike and Bazilević functions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Nak Eun Cho --- Pukyong National University, Republic of Korea Inhwa Kim --- Harris-Stowe State University, U.S.A H.M. Srivastava --- University of Victoria, CanadaThe object of the present paper is to derive some argument properties associated with meromorphic close-to-starlike and Bazilević functions in the punctured open unit disk. Furthermore, we investigate integral-preserving properties in a sector with some special cases of the main... -
Assessment of water quality and associated human health risk of a tropical freshwater body in Edo State, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Ekene Biose --- University of Benin, Nigeria Nkonyeasua Kingsley Egun --- University of Benin, Nigeria Nkolika Uzoh --- University of Benin, Nigeria Michael Osasele Omoigberale --- University of Benin, NigeriaThe quality of freshwater sources is a key factor in sustainable development. This study investigated the water quality suitability of Ossiomo River for human consumption and the implications for public health. Water samples were collected and analysed from October 2021... -
Interpersonal violence experienced by nurses caring for persons with intellectual disability: A phenomenological study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Andile Glodin Mokoena-de Beer --- Sefako Makgatho Health Sciences University, South Africa Mmasetlhaba Ruth Ledwaba --- Sefako Makgatho Health Sciences University, South Africa Lily Keneilwe Motswasele-Sikwane --- Sefako Makgatho Health Sciences University, South AfricaThis phenomenological study explored interpersonal violence experienced by nurses caring for persons diagnosed with intellectual disability at a selected psychiatric hospital in South Africa. In-depth phenomenological interviews were conducted with 16 nurses (female = 10, males = 06 with 2... -
Growth and adaptability of provenances and progenies of Pinus maximinoi H.E.Moore in northern Mozambique
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Cremildo Riba Gouveia Dias --- Agricultural Research Institute of Mozambique, Mozambique Laurina Adriano Guacha --- Institute of Geography and Spatial Planning, University of Lisbon, Portugal Aires Afonso Mbanze --- Universidade Lúrio (Campus Universitário de Unango), MozambiqueThe aim of this study was to evaluate the growth and adaptability of Pinus maximinoi provenances and progenies and to estimate the genetic variation that could be exploited in feature improvement (e.g. breeding studies). Data from this study are from... -
Biomass production and nutritional efficiency in short rotation eucalypt clone plantations for energy in north-east Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Welluma Teixeira Barros --- State University of Southwest Bahia, Brazil Patrícia Anjos Bittencourt Barreto-Garcia --- State University of Southwest Bahia, Brazil Valdemiro da Conceição Júnior --- State University of Southwest Bahia, Brazil Marcos Gervasio Pereira --- Federal Rural University of Rio de Janeiro, Brazil Paulo Henrique Marques Monroe --- State University of Southwest Bahia, Brazil Maicon dos Santos da Silva --- São Paulo State University, Brazil Mariana dos Santos Nascimento --- State University of Southwest Bahia, Brazil Jaqueline Lima Morais --- State University of Southwest Bahia, BrazilSelecting adapted hybrids with greater efficiency in the use and return of nutrients is essential to ensure the success of forestry activities. Although topics on the nutritional sustainability of eucalypt biomass harvesting have frequently been discussed, few studies have focused... -
Remote sublocales
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mbekezeli Nxumalo --- University of South Africa, South AfricaWe use the notion of a remote collection of a Tychonoff space to define a remote sublocale of any locale. Our definition is conservative, in the sense that, a subset is remote if and only if the sublocale it induces... -
Planar polynomial of the graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Behnaz Tolue --- Hakim Sabzevari University, Iran Alireza Doostabadi --- University of Zabol, Iran Sayed Masih Ayat --- University of Zabol, IranIn this paper, the planar polynomial of a graph is introduced and some of its properties are discussed. The planar polynomial of the graph G is real-rooted if and only if G is planar. This polynomial is not EE-invariant. Some... -
Predation on the St Joseph Callorhinchus capensis by Cape fur seals Arctocephalus pusillus pusillus in Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RH Leeney --- Namibia Nature Foundation, Namibia N Dreyer --- Ocean Conservation Namibia, NamibiaChondrichthyans form an important part of marine food webs as top predators and mesopredators. However, little is known about chondrichthyans in Namibian waters and the roles they play in ecosystem function. During efforts to disentangle Cape fur seals Arctocephalus pusillus... -
Movement and growth of the spotted gully shark Triakis megalopterus in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- Oceanographic Research Institute (ORI), South Africa GL Jordaan --- Oceanographic Research Institute (ORI), South Africa WN Dalton --- Oceanographic Research Institute (ORI), South Africa R Daly --- Oceanographic Research Institute (ORI), South Africa M Soekoe --- Reel Science Coalition, South Africa WM Potts --- Rhodes University, South Africa MJ Smale --- Zoology Department and Institute for Coastal and Marine Research, Nelson Mandela University, South Africa L Swart --- Fisheries and the Environment (DFFE), South AfricaThe movement and growth of spotted gully sharks Triakis megalopterus (family Triakidae) along the coast of South Africa were investigated using external dart tagging. Of a total of 7 211 sharks tagged, 657 (9.1%) were recaptured over a 37-year period,... -
Avian species assemblages in African mangrove forests
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: W Richard J Dean --- , South Africa Suzanne Milton --- , South AfricaAfrican mangrove forests are threatened by harvesting and climate change. Most bird species that occur in this habitat are either drawn from adjacent forests or woodlands or are marine and piscivorous species. Bird communities of East and southern African mangroves,... -
Living together, feeding apart: the comparative foraging ecology of two African flycatcher species
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Peter GH Frost --- , South Africa Suzanne K Frost --- FitzPatrick Institute of African Ornithology, University of Cape Town, South AfricaThis study examined how habitat and resource conditions influence the foraging behaviour and ecology of the Pale (Pallid) Flycatcher Agricola pallidus and Marico Flycatcher Bradornis mariquensis, two perch-and-pounce insectivores that swoop on prey from elevated perches. These species were studied... -
Conformally related invariant (α, β)-metrics on homogeneous spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Azar Fatahi --- University of Isfahan, Iran Masoumeh Hosseini --- University of Isfahan, Iran Hamid Reza Salimi Moghaddam --- University of Isfahan, IranIn this paper, we give the flag curvature formula of general (α, β)-metrics of Berwald type. We study conformally related (α, β)-metrics, especially general (α, β)-metrics that are conformally related to invariant (α, β)-metrics. Also, a necessary and sufficient condition... -
Wildlife corridors in a Southern African conservation landscape: the political ecology of multispecies mobilities along the arteries of anthropogenic conservation
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Michael Bollig --- University of Cologne, GermanyThe decline of biodiversity is a key topic in public discussions around the globe. These debates have triggered massive efforts to increase protected areas and to safeguard the corridors connecting them. The wildlife corridors dealt with in this article are... -
Hunting the hippo: a brief history of wildlife hunting and the reconfiguration of animal-human relations in Namibia’s Zambezi region
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Hauke-Peter Vehrs --- University of Cologne, GermanyThe Zambezi region in north-eastern Namibia is located at the centre of the Kavango-Zambezi Transfrontier Conservation Area (KAZA TFCA), an area that is endowed with a great variety of wildlife and managed not only to protect this asset but also... -
Mental health literacy in black South African communities
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Nonhlanhla Faith-Crescentia Matsoele --- University of Free State, South Africa Ntsoaki F. Tadi --- University of Free State, South AfricaThis study explored conceptualisation of the aetiology and treatment of depression, schizophrenia, and alcohol use disorder among black communities in South Africa. Utilising a cross-sectional design, we surveyed 240 black African community adult members (female = 122, male = 118;... -
Morphological variations in the African palm weevil, Rhynchophorus phoenicis (F) (Coleoptera: Curculionidae), in Kenya and Uganda
Item type: Journal Article • Journal: African Zoology • Authors: James P Egonyu --- International Centre of Insect Physiology and Ecology, Kenya Alfonce Leonard --- Tanzania Agricultural Research Institute (TARI) Ukiriguru Centre, Tanzania Chrysantus Mbi Tanga --- International Centre of Insect Physiology and Ecology, Kenya Sevgan Subramanian --- International Centre of Insect Physiology and Ecology, KenyaWe investigated morphological differences in the African palm weevil (Rhynchophorus phoenicis) from Kenya (Busia and Kwale) and Uganda using a LEICA EZ4HD stereo microscope and an absolute digimatic caliper. Ten pronotal colour patterns were recorded, of which two (brown with... -
Two new species of Hemidactylus Goldfuss, 1820 (Squamata: Gekkonidae) from the coastal areas of northern Somaliland
Item type: Journal Article • Journal: African Zoology • Authors: Tomáš Mazuch --- Mendel University, Czech Republic Vojtěch Janák --- Charles University, Czech Republic Doubravka Velenská --- Charles University, Czech Republic Annamaria Nistri --- Museo di Storia Naturale dell’Univesità degli Studi di Firenze, Italy Hassan Sh Abdirahman Elmi --- Charles University, Czech Republic Jiří Šmíd --- Charles University, Czech RepublicThe taxonomy of many Hemidactylus geckos from the Horn of Africa has recently been evaluated. However, the lack of fresh material for some species and also regions has led to the misidentification of some taxa and an underestimation of the... -
Parasitoid guild of the citrus leafminer, Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) in Tunisian citrus orchards and a new report of Cirrospilus ingenuus Gahan (Hymenoptera: Eulophidae)
Item type: Journal Article • Journal: African Zoology • Authors: Dorra Mansour --- University of Sousse, Regional Research Centre on Horticulture and Organic Agriculture at Chott Meriem, Institut Supérieur Agronomique de Chott-Mariem, Tunisia Mohamed Braham --- University of Sousse, Regional Research Centre on Horticulture and Organic Agriculture at Chott Meriem, Institut Supérieur Agronomique de Chott-Mariem, TunisiaA survey of the parasitoid species of the citrus leafminer (CLM), Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae), a cosmopolitan pest of citrus, was carried out in 2019 and 2020 in the major citrus production area of Tunisia. Four different Eulophidae species... -
The isomorphism problem for rational group algebras of finite metacyclic nilpotent groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Àngel García-Blázquez --- Universidad de Murcia, Spain Ángel del Río --- Universidad de Murcia, SpainWe prove that if G and H are finite metacyclic groups with isomorphic rational group algebras and one of them is nilpotent, then G and H are isomorphic. -
On conjugacy of additive actions in the affine Cremona group
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ivan Arzhantsev --- HSE University, RussiaAn additive action on an irreducible algebraic variety X is an effective action with an open orbit of the vector group . Any two additive actions on X are conjugate by a birational automorphism of X. We prove that, if... -
Chen-Chvátal’s conjecture for graphs with restricted girth
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Luis Pedro Montejano --- Universitat Rovira i Virgili, SpainA classic result in Euclidean geometry asserts that every non-collinear set of n points in the Euclidean plane determines at least n distinct lines. Chen and Chvátal conjectured that this holds for an arbitrary finite metric space, with an appropriate... -
A generalization of Riesz* homomorphisms on order unit spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Florian Boisen --- Institut für Analysis, TU Dresden, Germany Valentin G. Hölker --- Institut für Analysis, TU Dresden, Germany Anke Kalauch --- Institut für Analysis, TU Dresden, Germany Janko Stennder --- Institut für Analysis, TU Dresden, Germany Onno van Gaans --- Leiden University, The NetherlandsRiesz homomorphisms on vector lattices have been generalized to Riesz* homomorphisms on ordered vector spaces by van Haandel using a condition on sets of finitely many elements. Van Haandel attempted to prove that it suffices to take sets of two... -
Afrocentric triple helix: A communal perspective on addressing Africa’s economic and social challenges
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Motolani Agbebi --- University of Tampere, Finland Jianing Song --- University of Manchester, UK Aminu Mamman --- University of Manchester, UK Nabil Baydoun --- Academic Affairs, Vice Chancellor Office, Hamdan Bin Mohammed Smart University, United Arab EmiratesThat collaboration has always been the foundation of human development as well as the coping strategy of some animal species is a view widely shared by scholars. In fact, no individual, organization or nation can produce everything it needs without... -
Cayley regression problem of some groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Q. Liao --- Guangdong University of Education, P.R. China W. Liu --- Central South University, P.R. China J. Tang --- Hunan First Normal University, P.R. ChinaIn this paper, we consider the Cayley regression problem of the cyclic groups and the dihedral groups. We give the sufficient and necessary conditions for the cyclic group ℤ n to be a Cayley regression. Moreover, the dihedral group D... -
On the skew eigenvalues of joined union of oriented graphs and applications
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Hilal A. Ganie --- , India Archana Ingole --- , India Ujwala Deshmukh --- , IndiaLet be an oriented graph with n vertices and m arcs having underlying graph G. The skew matrix of oriented graph , denoted by is a (−1, 0, 1)- skew symmetric matrix. The skew eigenvalues of are the eigenvalues of... -
A generalization of the MP-
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Estimation accuracy of bean bags as portion size estimation aids for amorphous foods
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Friedeburg Anna Maria Wenhold --- University of Pretoria, South Africa Una Elizabeth MacIntyre --- University of Pretoria, South Africa -
Interrelations between metformin administration and vitamin B12 concentrations in a black South African diabetic cohort: a retrospective cohort analysis
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: B Naidoo --- Greys Hospital, University of KwaZulu-Natal, South Africa S Pillay --- King Edward VIII, South Africa D Wilson --- Edendale Hospital, South Africa -
Implementing open innovation in a closed biopharmaceutical industry
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sepehr Ghazinoory --- Tarbiat Modares University, Iran Maryam Nozari --- Islamic Azad University, Iran Hadi Siadati --- Islamic Azad University, IranOver the last decade, biopharmaceuticals’ research, development, production, and sale have involved high risks and costs for companies. Hence companies have moved toward reaping the benefits of open innovation models. Open innovation is a paradigm that forces the company to... -
Water-quality assessment and spatial distribution of water-quality parameters of Dodoma Urban, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OJ Mdee --- University of Dodoma, Tanzania B Mndolwa --- University of Dodoma, Tanzania N Sadiki --- University of Dodoma, TanzaniaThe study was conducted in 2022 in shallow wells and deep boreholes owned by residents, to investigate the water quality status in the emerging developing area of Dodoma Urban municipality in central Tanzania. Eighteen boreholes and five shallow wells were... -
The impact of printing industry effluent on the growth and antioxidant response of the freshwater green microalga Chlorella sorokiniana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IY Okpanachi --- Nigerian Army University Biu, Nigeria U Aminu --- Ahmadu Bello University, Nigeria AO Jolaoso --- University of Lagos, Nigeria WN Yusufu --- Ahmadu Bello University, Nigeria E Abdulmalik --- Ahmadu Bello University, Nigeria MA Chia --- Ahmadu Bello University, NigeriaContamination of aquatic ecosystems with printing industry wastewater is a serious concern because of the toxicity associated with the effluent components and a tendency to create cascading ecological effects. The influence of printing-press effluent on the freshwater microalga Chlorella sorokiniana... -
Distribution and host preference of a potential biocontrol agent with a new association for the alien water lily Nymphaea mexicana in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MK Reid --- Rhodes University, South Africa GF Sutton --- Rhodes University, South Africa JA Coetzee --- Rhodes University, South Africa LA Gettys --- University of Florida, United States MP Hill --- Rhodes University, South AfricaAlthough classical biological control makes use of natural enemies from the native range of an invasive alien species, there are occurrences in which species in the invaded range expand their host range and form new associations with the invader. Bagous... -
Variations in the heart rate of Mediterranean mussels Mytilus galloprovincialis and brown mussels Perna perna under thermal stress on rocky shores of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Beine --- University of Johannesburg, South Africa LJ Connell --- University of Johannesburg, South Africa R Greenfield --- University of Johannesburg, South AfricaIntertidal mussels experience prolonged emersion during low tide, followed by rapid submergence cooling during high tide, causing temperature-induced stress responses. This study examined variations in heart rate to investigate the relationship between emerged and submerged thermal stress in Mediterranean mussels... -
Characterisation, prevalence and antibiogram of Aeromonas hydrophila in turtles: insights into virulence factors, antimicrobial resistance genes and innate immunity
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Ahmed R. Khafagy --- Suez Canal University, Egypt Atef M. Kamel --- Suez Canal University, Egypt El-sayed N. Abou El Ghait --- National Institute of Oceanography and Fisheries (NIOF), Egypt Nermeen M. Mohamed --- Cairo University, Egypt Nada H. Eidaroos --- Suez Canal University, Egypt Fatma A. Hagag --- National Institute of Oceanography and Fisheries (NIOF), Egypt Mohamed Fathi --- National Institute of Oceanography and Fisheries (NIOF), EgyptBacterial infection poses a significant threat to the health and survival of turtles, both in their natural habitats and in captivity. Notably, the presence and interactions of bacteria, such as those belonging to the Aeromonas genus, have been identified for... -
Patterned, plain, and in-between: An assessment of ecogeographic divergence between colour pattern morphs of the common egg-eater Dasypeltis scabra
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jody M. Barends --- University of Johannesburg, South Africa Ielhaam Bassier --- University of the Western Cape, South Africa Emma E. Buckley --- University of the Western Cape, South Africa Cora S. Stobie --- National Museum, South Africa Michael F. Bates --- National Museum, South AfricaIntraspecific variation in colour patterns may reflect adaptive responses to local environmental regimes that favour selection of different trade-offs between visual communication, thermoregulation, and anti-predatory functions. Understanding the drivers of colour pattern variation within species can therefore provide valuable insights... -
Unveiling the First Neobatrachian (Anura) Discovered in the paleokarst system of Bolt’s Farm (Plio-Pleistocene; Cradle of Humankind), South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Alfred Lemierre --- Muséum national d’Histoire naturelle, France Nonhlanhla Vilakazi --- University of Johannesburg, South Africa Dominique Gommery --- Muséum national d’Histoire naturelle, France Lazarus Kgasi --- Ditsong: National Museum of Natural History, South AfricaAnurans are widely diversified in South Africa, with more than 150 recognised species across the country. However, most the known fossil records of anurans are concentrated in the southern part of South Africa, within the rich Pliocene site of Langebaanweg... -
Phylogeographic structuring in a widespread southern African grass snake (Psammophiinae: Psammophylax rhombeatus)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: C. Keates --- Rhodes University, South Africa W. Conradie --- Port Elizabeth Museum (Bayworld), South Africa S. Edwards --- Rhodes University, South AfricaThe structural and environmental heterogeneity within southern Africa has given rise to many morphological forms of Psammophylax rhombeatus distributed throughout the country, with previous studies neglecting the associated molecular significance of these forms. The species’ widespread, generalist ecology coupled with... -
Evolutionary relationships in the African frog family Ptychadenidae, including the first molecular analysis, range extension, and distribution modelling of the monotypic genus Lanzarana
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Tadeáš Nečas --- , Czech Republic Tomáš Mazuch --- Mendel University, Czech Republic Janis Czurda --- , Czech Republic Hassan Sh Abdirahman Elmi --- Charles University, Czech Republic Mark-Oliver Rödel --- , Germany Václav Gvoždík --- , Czech RepublicThe family Ptychadenidae contains three ecologically and morphologically distinct genera: the widespread, species-rich and above-ground dwelling Ptychadena, the less widespread and diverse, burrowing Hildebrandtia, and the little-known, burrowing, monotypic Lanzarana, endemic to Somalia. Previous morphological studies placed Lanzarana in a... -
Migratory movement of photo-identified humpback whales Megaptera novaeangliae along the southeastern coast of Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Tree --- Cape Peninsula University of Technology, South Africa J Olbers --- , South Africa E Seyboth --- Cape Peninsula University of Technology, South Africa SM Seakamela --- , South Africa VG Cockcroft --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa E Vermeulen --- Mammal Research Institute Whale Unit, University of Pretoria, South Africa KP Findlay --- Cape Peninsula University of Technology, South AfricaThe global conservation of humpback whales Megaptera novaeangliae relies on continuous assessments of the populations’ post-whaling status, which in turn require information on population mixing and movements. One of the seven breeding stocks in the Southern Hemisphere, breeding stock C... -
The use of image classification to estimate flamingo abundance from aerial, drone and satellite imagery
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: RB Colyn --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, South Africa TA Anderson --- BirdLife South Africa, South Africa MD Anderson --- BirdLife South Africa, South Africa EF Retief --- BirdLife South Africa, South Africa EJ Van der Westhuizen-Coetzer --- , South Africa H Smit-Robinson --- BirdLife South Africa, South AfricaThe Lesser Flamingo Phoeniconaias minor is a Near Threatened species known to be highly gregarious and that can concentrate in large numbers at core foraging and breeding sites, yet is also known to disperse widely in search of suitable foraging... -
Population genetics and key phenotypic variability does not support different subspecies of Yellow-throated Woodland Warbler Phylloscopus ruficapilla within the Eastern Cape, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jake M Mulvaney --- Stellenbosch University, South Africa Michael I Cherry --- Stellenbosch University, South AfricaTwo subspecies of the Yellow-throated Woodland Warbler Phylloscopus ruficapilla (family Phylloscopidae) have been recognised in South Africa based on the extent and intensity of yellow colouration. Our previous multi-locus population genetic survey across much of the Eastern Cape and southern... -
On emergent mobile phone-based social engineering cyberattacks in developing countries: The case of the Zambian ICT sector
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Aaron Zimba --- ZCAS University, Zambia, George Mukupa --- Mulungushi University, Zambia, Victoria Chama --- University of Cape Town, South Africa,The number of registered SIM cards and active mobile phone subscribers in Zambia in 2020 surpassed the population of the country. This development and the integration of mobile phone systems with financial payment systems has not come without a cost... -
The ‘Airlift Program’ and the Making of a ‘Glocal’ Citizen: Exploring the Nomadic Subject in Philip Ochieng’s Biography, The 5th Columnist: A Legendary Journalist (2015) by Liz Gitonga-Wanjohi
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Christopher Odhiambo Joseph --- Moi University, KenyaThe story of Kenyans who travelled to study in the United States of America, in what is known as the airlifts program and, its resultant implications on the project of the nation building, is well known. So much has been... -
Serving Hot Tea: Analyzing Narratives of ‘Abroad’ on Glocal Kenyan Twitter/X Spaces
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Caroline Mose --- The Mawazo Institute, KenyaSocial media reconstitutes the idea of ‘abroad’ as a geographical place, shortens the symbolic distance between borders, and renders the local and global into one almost seamless space. This seamlessness is both metaphorical and symbolic, where happenings on the spatial... -
Early selection for rust resistance in eucalypt progenies and implications for other traits of interest in tree breeding
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Daniele Aparecida Alvarenga Arriel --- Instituto de Ciências Agrárias, Universidade Federal de Uberlândia, Brazil Lúcio Mauro da Silva Guimarães --- , Brazil Reginaldo Gonçalves Mafia --- , Brazil Edival Ângelo Valverde Zauza --- , Brazil Acelino Couto Alfenas --- Universidade Federal de Viçosa, BrazilPlanting of resistant clones is the main control strategy for rust caused by Austropuccinia psidii on eucalypts in Brazil. Phenotyping for resistance to rust is performed at the last stage of the breeding programme on genetic material preselected for growth... -
Strong soil–vegetation relationship in riparian forests of the middle Rio Doce watershed, south-eastern Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Débora Oliveira Sousa --- Universidade Federal de Minas Gerais, Brazil Daniel Negreiros --- Universidade Federal de Minas Gerais, Brazil Letícia Ramos --- Universidade Federal de Minas Gerais, Brazil João Carlos Gomes Figueiredo --- Universidade Estadual de Montes Claros, Brazil Dario C Paiva --- Institute of Environment, Florida International University, USA Yumi Oki --- Universidade Federal de Minas Gerais, Brazil Wénita de Souza Justino --- Universidade Federal de Minas Gerais, Brazil Rubens Manoel dos Santos --- Universidade Federal de Lavras, Brazil Lorena Ashworth --- Universidade Federal de Minas Gerais, Brazil Yule Roberta Ferreira Nunes --- Universidade Estadual de Montes Claros, Brazil G Wilson Fernandes --- Universidade Federal de Minas Gerais, BrazilPhytosociological surveys and soil quality studies are relevant tools for the implementation of restoration programmes. This study aimed to characterise the vegetation of the tree and sapling strata in preserved riparian forests of the middle portion of the Rio Doce... -
On the general position number of the k-th power graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jing Tian --- Zhejiang University of Science and Technology, China Kexiang Xu --- Nanjing University of Aeronautics & Astronautics, ChinaA set is called a general position set of a graph G if any triple set V 0 of R is non-geodesic, that is, three elements of V 0 cannot lie on the same geodesic of G. The general position... -
Some characterizations of ergodicity in Riesz spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Youssef Azouzi --- Tunis-El Manar University, Tunisia Marwa Masmoudi --- Tunis-El Manar University, TunisiaIn the recent surge of papers on ergodic theory within Riesz spaces, this article contributes by introducing enhanced characterizations of ergodicity. Our work extends and strengthens prior results of both the authors and Homann, Kuo, and Watson. Specifically, we show... -
Narcissistic female serial killers: A psychobiographical study of Cecilia Johanna Steyn
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Monique Erasmus --- University of Johannesburg, South Africa Zelda G. Knight --- University of Johannesburg, South AfricaThis article examines the psychobiography of Cecilia Johanna Steyn, a female serial killer from South Africa. The study analysed Cecilia Steyn’s childhood development to suggest possible adverse childhood experiences predisposing her to instigate murders on her demand. Drawing on the... -
Family quality of life of Ghanaian families raising people with intellectual disability
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Daniel Miezah --- University of Cape Coast, Ghana Emmanuel Eshun --- University of Cape Coast, Ghana Kenneth Owusu Ansah --- , GhanaThis study examined the family quality of life (FQOL) of people with intellectual disabilities (PWID). Participants were 176 Ghanaian parents of PWID (mothers = 71.6%). The mean age of the parents was 41.64 years (SD = 9.21 years). The parents... -
Perceptions and knowledge about the use of biological indicators in freshwater ecosystem monitoring in Rwanda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Nzarora --- College of Science and Technology, University of Rwanda, Rwanda C Cocquyt --- , Belgium V Nzibaza --- Center of Excellence in Biodiversity and Natural Resources Management, University of Rwanda, Rwanda V Nsengimana --- College of Science and Technology, University of Rwanda, Rwanda PJ Mugume --- Center of Excellence in Biodiversity and Natural Resources Management, University of Rwanda, Rwanda BA Kaplin --- College of Science and Technology, University of Rwanda, RwandaThe use of biological monitoring (biomonitoring) to assess water quality is recognised alongside the use of chemical and physicochemical parameters due to its ability and efficiency in providing information about both current and long-term changes. Indeed, biomonitoring is applied in... -
Occurrence of contaminants of emerging concern in the uMhlathuze and uThukela river systems, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LR Nsibande --- University of Zululand, South Africa RF Lehutso --- Water Centre, Council for Scientific and Industrial Research, South Africa M Thwala --- Academy of Science of South Africa, South Africa HMM Mzimela --- University of Zululand, South Africa M Seopela --- University of Johannesburg, South Africa NF Masikane --- University of Zululand, South AfricaContaminants of emerging concern (CECs), which include inorganic substances, exhibit potential adverse effects on aquatic life even though they commonly occur at very low concentrations in aquatic resources. The lack of data available about the risk of CECs to the... -
The number of 1-nearly independent vertex subsets
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Eric O.D. Andriantiana --- Rhodes University, South Africa Zekhaya B. Shozi --- University of KwaZulu-Natal, South AfricaLet G be a graph with vertex set V(G) and edge set E(G). A subset I of V(G) is an independent vertex subset if no two vertices in I are adjacent in G. We study the number, σ 1(G), of... -
Semi-c-periodicity, c-uniform recurrence and almost automorphy in the complex plane
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: H. Ounis --- University of Alicante, Spain J.M. Sepulcre --- University of Alicante, SpainThis paper is devoted to develop the concepts of semi-c-periodicity, c-uniform recurrence and almost automorphy for functions defined on vertical strips in the complex plane, where c is a non-zero complex number. As an extension of the study performed for... -
Some results on anti-pre-Lie superalgebras and admissible Novikov superalgebras
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Zhao Chen --- Guangxi University for Nationalities, China Shanshan Liu --- Shenzhen Technology University, China Liangyun Chen --- Northeast Normal University, ChinaIn this paper, we extend the notion of anti-pre-Lie algebras to the ℤ2-graded version, and introduce the notion of anti-pre-Lie superalgebras. They can be characterized as a class of Lie-admissible superalgebras that satisfy its negative left multiplication operators are the... -
Sophie Germain prime p and the permutation of product of first p cycles
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: M. Makeshwari --- Central University of Tamil Nadu, India V.P. Ramesh --- Central University of Tamil Nadu, India R. Thangadurai --- Harish-Chandra Research Institute, A CI of Homi Bhabha National Institute, IndiaFor a natural number n, the permutation (n!) is defined as the left-to-right product of the first n cycles, namely, . In this article, we prove that for any natural number n, 2 is a primitive root of 2n +... -
On partial endomorphisms of a star graph
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ilinka Dimitrova --- South-West University “Neofit Rilski”, Bulgaria Vítor H. Fernandes --- Universidade Nova de Lisboa, Portugal Jörg Koppitz --- Institute of Mathematics and Informatics, BulgariaIn this paper we consider the monoids of all partial endomorphisms, of all partial weak endomorphisms, of all injective partial endomorphisms, of all partial strong endomorphisms and of all partial strong weak endomorphisms of a star graph with a finite... -
Population trends of the Cape Parrot Poicephalus robustus in the Amatholes, Eastern Cape: trialling ground-based flock photography for demographic and health assessment
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Clare J Padfield --- , South Africa Kate F Carstens --- , South Africa Johann C Carstens --- , South Africa Francis R Brooke --- , South Africa Kirsten Wimberger --- , South AfricaGlobally, 60% of species in the order Psittaciformes are experiencing population declines. Understanding demographic and health trends in populations is vital for the prioritisation of limited conservation resources. The Cape Parrot Poicephalus robustus is a South African endemic forest species... -
Female song in tinkerbirds (family Lybiidae)
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Sifiso M Lukhele --- University of Cyprus, Cyprus Matteo Sebastianelli --- University of Cyprus, Cyprus Alexander NG Kirschel --- University of Cyprus, CyprusIn species that are sexually monomorphic, it can be challenging to ascertain whether both males and females sing. This is particularly the case when there are no discernible differences in the vocalisations of each sex. It is known that females... -
Gay men coming out later in life: A hermeneutic analysis of acknowledging sexual orientation to oneself
Item type: Journal Article • Journal: Indo-Pacific Journal of Phenomenology • Authors: Quentin Allan --- Auckland University of Technology, New ZealandGiven the residual homonegativity in evidence throughout our diverse communities, and given the large numbers of gay people who remain “in the closet”, it is critical that we seek to understand in greater depth the complexities of the coming-out process... -
Molecular evidence reveals fish-pathogenic Aphanomyces spp. (Oomycetes: Saprolegniales) on new host of the threatened seasonal cyprinodont fish Nothobranchius spp. (Teleostei: Cyprinodontiformes) in south-eastern Democratic Republic of Congo
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Béla Nagy --- , FranceThe Aphanomyces species pose an important global threat and cause damage to aquaculture and agriculture by infecting aquatic animals and plants. Several subpopulations of the seasonal cyprinodont fish genus Nothobranchius with lesions suggestive of infection with Aphanomyces invadans, were observed... -
A preliminary macroinvertebrate index of biotic integrity (M-IBI) for monitoring the highland flood plain wetland ecosystems in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet Fetene --- Asossa University, Ethiopia Seyoum Mengistou --- Addis Ababa University, Ethiopia Bikila Warkineh Dullo --- Addis Ababa University, EthiopiaAnthropogenic activities have put tremendous pressure on the natural condition of wetlands. However, few studies have used indices based on benthic invertebrates to assess the effect of these pressures on wetland ecosystems. Multi-metric indices (MMIs) have been used successfully to... -
Life-history strategy and intertidal distribution in sympatric species of pulmonate limpets of the genus Siphonaria
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CD McQuaid --- Rhodes University, South Africa RJ Chambers --- Rhodes University, South AfricaThree species of the intertidal pulmonate limpet genus Siphonaria are sympatric on the south coast of South Africa and all lay gelatinous benthic egg masses. Siphonaria capensis and S. concinna hatch as planktonic larvae, whereas S. serrata has direct-developing larvae... -
Strengthening the DNA barcode reference library for marine copepods in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Rawoot --- University of the Western Cape, South Africa A Govender --- Oceanographic Research Institute (ORI), South Africa JC Groeneveld --- Oceanographic Research Institute (ORI), South Africa S Willows-Munro --- University of KwaZulu-Natal, South Africa R Cedras --- , South AfricaDNA barcode reference libraries that link taxonomically verified species records to standardised barcode sequences form the basis for species identification using molecular methods. We conducted an integrated morphology and molecular study of marine copepods collected from the continental shelf of... -
Predator avoidance by mesopredatory benthic sharks in response to potential predators in a natural environment
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DBS Rooth --- National Institute of Aquatic Resources, Technical University of Denmark, Denmark RGA Watson --- , South AfricaSome benthic elasmobranch mesopredators utilise crypsis to avoid predation by higher trophic predators. While this ability has been documented in various elasmobranchs such as rays, cryptic behaviour has been scarcely documented in catsharks (family Scyliorhinidae). Freezing behaviour by leopard catsharks... -
Aspects of the reproductive biology of the common Octopus vulgaris from landings in the coastal trawl and artisanal fleets in the Atlantic waters of southern Morocco
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Oubahaouali --- Abdelmalek Essaâdi University, Morocco A Kaddouri --- Abdelmalek Essaâdi University, Morocco M Aksissou --- Abdelmalek Essaâdi University, MoroccoAn investigation of aspects of the reproductive biology of the common octopus Octopus vulgaris caught in the Atlantic waters of southern Morocco was undertaken in 2020. The study focused on the demographic structure and sexual maturity of O. vulgaris by... -
Big cities, big bodies: urbanisation correlates with large body sizes and enhanced body condition in African dwarf chameleons (Genus: Bradypodion)
Item type: Journal Article • Journal: African Zoology • Authors: Jody M Barends --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South Africa Krystal A Tolley --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South AfricaUrbanisation is a major driver of habitat transformation that alters the environmental conditions and selective regimes of the habitats where it occurs. For species inhabiting urban habitats, such alterations can facilitate adaptive responses in their phenotypes, including their morphology. Quantifying... -
Phenotypic variation and association of agronomic traits in tepary bean genotypes under drought-stress and non-stress conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Saul Eric Mwale --- School of Agricultural, Earth and Environmental Sciences, African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, South Africa Hussein Shimelis --- School of Agricultural, Earth and Environmental Sciences, African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, South Africa Wilson Nkhata --- School of Agricultural, Earth and Environmental Sciences, African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, South Africa Abel Sefasi --- Lilongwe University of Agriculture and Natural Resources, Malawi Isaac Fandika --- Kasinthula Agricultural Research Station, Malawi Jacob Mashilo --- School of Agricultural, Earth and Environmental Sciences, African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, South AfricaGenetic variation for economic traits associated with drought adaptation is a prerequisite for developing climate-smart crop varieties, including tepary bean (Phaseolus acutifolius A. Gray). This study aimed to assess the magnitude of genetic variation and the relationship of agronomic traits... -
Does board diversity influence idiosyncratic risk: Empirical evidence from Chinese listed firms
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Furman Ali --- School of Finance, Southwestern University of Finance and Economics, China Muhammad Awais Khan --- Research Institute of Economics and Management, Southwestern University of Finance and Economics, China Zohaib Zahid --- Jiangsu University, China Khadim Hussain --- College of Economics, Shenzhen University, ChinaThis study examines the relationship between board diversity, measured as cognitive (tenure, expertise, and education) and demographic (age, gender, and nationality) diversities, and idiosyncratic risk for 2000 Chinese non-financial firms from 2008 to 2020. This study highlights that cognitive board... -
DNA sequence data confirms the presence of two closely related cypress-feeding aphid species on African cypress (Widdringtonia spp.) in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Mesfin Wondafrash --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Michael J Wingfield --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Brett P Hurley --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Bernard Slippers --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Eston K Mutitu --- Kenya Forest Research Institute (KEFRI), Kenya Herbert Jenya --- Forestry Research Institute of Malawi, Malawi Trudy Paap --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South AfricaAphids in the genus Cinara (Hemiptera: Aphididae) are pests of coniferous trees globally. Some of these aphids have become invasive in various parts of the world and have led to significant economic and environmental damage. During surveys conducted as part... -
Willingness to stay or quit: evidence from migrants working in the galway bar and restaurant industry in Ireland
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Olaiwola Jamiu Ogunpaimo --- University of Galway, Ireland Kesiena Ebenade --- School of Business, National College of Ireland, IrelandHealth and safety issues, irregular working hours and low wages frequently intensify the concerns that migrant hospitality workers experience regarding their jobs. Given these challenges, the article explores the work motivation and career intentions of migrant workers in the Galway... -
Phosphorus sorption kinetics in calcareous soils of selected arid and semi-arid toposequences and its relationship with plant growth
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Jafari --- Department of Soil Science, College of Agriculture, Isfahan University of Technology, Iran H. Shariatmadari --- Department of Soil Science, College of Agriculture, Isfahan University of Technology, Iran Y. Rezainejad --- Department of Soil Science, College of Agriculture, Isfahan University of Technology, Iran Sh. Ghalami --- Department of Soil Science, College of Agriculture, Isfahan University of Technology, IranAn array of kinetic equations has been used to describe time-dependent sorption of P by soils. We investigated P sorption kinetics in calcareous soils at upper-, mid-, and lowerslope positions of two arid and two semi-arid landscapes and its relationship... -
The potential use of a water treatment residue as a temporary growth medium over a coal combustion ash: yield response of two creeping grasses
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.W. Titshali --- Soil Science, School of Environmental Sciences, University of KwaZulu-Natal, Private Bag X01, Scottsville 3209,, South Africa J.C. Hughes --- Soil Science, School of Environmental Sciences, University of KwaZulu-Natal, Private Bag X01, Scottsville 3209,, South AfricaRecent research has indicated the potential for recovery of aluminium from alumina-rich coal-combustion ashes (CCA). However, the ash disposal sites, if not vegetated, often present environmental risks due to water and air-borne dispersal of contaminants. This study investigated the potential... -
The effect of superphosphate on the productivity of mucuna (Mucuna pruriens) on a sandy loam soil in Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.D. Shoko --- Department of Agronomy, University of Stellenbosch, Private Bag X1, RSA P.J. Pieterse --- Department of Agronomy, University of Stellenbosch, Private Bag X1, RSA G.A. Agenbag --- Department of Agronomy, University of Stellenbosch, Private Bag X1, RSAPositive responses to increased soil phosphorus (P) supply have been noted for several leguminous species including mucuna (Mucuna pruriens). The major objective of this research was to investigate the effect of P level of 40 kg P ha-1 on the... -
Anticolonial Networks and Unbalances in Literary Journals and Bulletins: Mensagem, Présence Africaine and Black Orpheus
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Noemi Alfieri --- CHAM, NOVA FCSH/UaC, PortugalThis paper looks at the connections between the editorial projects of Mensagem (edited in Lisbon, by Casa dos Estudantes do Império, 1948–1965), Présence Africaine (Paris, France and Dakar, Senegal, from 1947) and Black Orpheus (Ibadan, Nigeria, 1957–1975). It reflects on... -
COVID-19 restrictions lifting and the health of older adults: Evidence from a quasi-natural experiment
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Xiaowen Li --- Sichuan Institute of Industrial Technology, China Yuanqing He --- Anhui Normal University, China Jinshan Wu --- Hainan Vocational University of Science and Technology, China Hao Xu --- Sichuan Institute of Industrial Technology, ChinaWe investigated the health changes in older adults after the lifting of COVID-19 restrictions. Utilising a quasi-natural experiment design based on pandemic restrictions lifting in China and South Korea from 2020 to 2022, we analysed an existing data set of... -
Authenticity, self-control, and smartphone dependence in adolescence: Path analysis and latent profile analysis
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ying Zhu --- Mental Health Counselling and Guidance Centre for University Students, Huaibei Normal University, China Zihao Wang --- Huaibei Normal University, ChinaHow adolescents present positive self-qualities on the Internet has the potential to influence the extent of their smartphone usage. We examined the effect of adolescents’ authenticity and self-control on their level of smartphone dependence. First, the relationship between the three... -
Dance sport involvement and behavioural loyalty: Body image and self-efficacy among university students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Yongdi Wang --- Hunan City University, China Kyungsik Kim --- Hoseo University, South Korea Qingyang Shao --- Hoseo University, South KoreaWe investigated the role of body image and self-efficacy in the relationship between dance sport involvement, and behavioural loyalty in university students participating in dance sport. A total of 75 students from each of ten universities were recruited. Participant were... -
The moderating role of emotional intelligence on the association between adverse childhood experiences and conduct problems of adolescents
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Joy I. Ugwu --- University of Nigeria, Nigeria Peace N. Ibeagha --- University of Nigeria, Nigeria Cecilia O. Apex-Apeh --- University of Nigeria, Nigeria Charity N. Onyishi --- State University of Medical and Applied Sciences Igbo Eno, Nigeria Amuche B. Onyishi --- University of Nigeria, Nigeria Ike E. Onyishi --- University of Nigeria, NigeriaWe explored the moderating role of emotional intelligence in the relationship between adverse childhood experiences and conduct problems of adolescents. The participants were 588 in-school Nigerian adolescents (male = 59.9%; mean age = 14.64 years, SD = 1.31 years). They... -
The approximation property for the predual of weighted spaces of holomorphic mappings on Banach spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Deepika Baweja --- , India Jahir Abbas Sardar --- , IndiaIn this paper, we investigate the approximation property for the predual of the weighted space of holomorphic mappings, where is a countable family of weights defined on a balanced open subset U of a Banach space E. We introduce a... -
Trends and psychosocial factors associated with health-risk behaviours among university students in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Marizanne Lu-Visser --- Asia University, Taiwan Laurencia Sylvano --- Asia University, Taiwan Earl Francis Infante Mallari --- Asia University, Taiwan Karl Peltzer --- Asia University, TaiwanSignificant urbanisation and increased tertiary enrolment shifted lifestyle and health behaviours among young adults in South Africa. Therefore, we investigated the trends and psychosocial determinants associated with health-risk behaviours among university students in South Africa. Cross-sectional survey data collected during... -
Gratitude to nature and pro-environmental behaviour: A moderated mediated model
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Xiaoyu Li --- Inner Mongolia Normal University, China Xindi Kong --- Inner Mongolia Normal University, China Hongyu Liang --- Inner Mongolia Normal University, China Yifan Wang --- Inner Mongolia Normal University, ChinaWe examined the relationship between trait gratitude to nature and pro-environmental behaviours, and the roles of anthropomorphism and connectedness to nature within this relationship. University students (n = 966; female = 47.09%; mean age = 20.75 years, SD = 1.42... -
Redescription of Arabella iricolor (Montagu, 1804) with descriptions of two new species from the United Kingdom and South Africa
Item type: Journal Article • Journal: African Zoology • Authors: T Darbyshire --- , Wales, United Kingdom J Kara --- Cape Peninsula University of Technology, South AfricaArabella iricolor (Montagu, 1804) was described with no diagnostic information for the characters used today to distinguish species within the genus. An updated description, together with genetic data, is provided using the holotype in conjunction with additional specimens collected at... -
A new species of Malacoceros (Annelida, Polychaeta, Canalipalpata, Spionidae) from urban waters in Gabon
Item type: Journal Article • Journal: African Zoology • Authors: Nicolas Lavesque --- Université de Bordeaux, CNRS, Bordeaux INP, EPOC, France Aimé Roger Nzigou --- Université des Sciences et Techniques de Makusu (USTM), Gabon Guillemine Daffe --- Université de Bordeaux, Observatoire Aquitain des Sciences de l’Univers, France Johann Ludovic Martial Happi --- Université des Sciences et Techniques de Makusu (USTM), Gabon Geon Hyeok Lee --- National Institute of Biological Resources, Seo-gu, Korea Karin Meißner --- Senckenberg am Meer, Deutsches Zentrum für Marine Biodiversitätsforschung (DZMB), GermanyA new species of Malacoceros is described from estuarine equatorial waters in Libreville (Gabon, West Africa). During a recent environmental study aimed to assess the urban impact on an estuarine ecosystem near Libreville, the collection of sediment samples from the... -
Eunicid polychaete worms used as bait with particular reference to Australia, South Africa and France; the need for development of management plans based on their biology and ecology
Item type: Journal Article • Journal: African Zoology • Authors: Pat Hutchings --- Australian Museum Research Institute, Australia Jyothi Kara --- , South Africa Nicolas Lavesque --- CNRS, Université de Bordeaux, Bordeaux INP, EPOC,Worldwide, bait worms are collected for recreational and subsistence fishing, and fetch high prices in bait shops. While a variety of polychaete families are collected, we focus only on the “Marphysa” group (Family Eunicidae) occurring in rivers, estuaries and protected... -
Lumbrineris magalhaensis Kinberg, 1865 (Annelida: Lumbrineridae) revealed as two indigenous species in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Adri van Niekerk --- Stellenbosch University, South Africa Jyothi Kara --- Iziko South African Museum, South Africa Arturo Alvarez-Aguilar --- Stellenbosch University, South Africa Carol A Simon --- Stellenbosch University, South AfricaLumbrineris magalhaensis Kinberg, 1865 (Annelida: Lumbrineridae) is a marine polychaete worm that was first described from the Magellan Strait, Chile; thereafter it was also reported in sub-Antarctic, temperate and tropical regions, where it was likely misidentified. In South African waters,... -
Prevalence of mixed dermatophyte and non-dermatophyte onychomycosis in surveillance of patients with diabetes living in a sub-tropical climate and association with selected diabetes foot ulcer risk factors
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: AT Thompson --- University of KwaZulu-Natal, South Africa C Aldous --- University of KwaZulu-Natal, South Africa -
Stability and performance of Bambara groundnut (Vigna subterranea (L.) Verdc.) genotypes in different South African environments
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sithembile Kunene --- University of KwaZulu-Natal, Pietermaritzburg campus, College of Agriculture, Engineering and Science, School of Agricultural Earth, and Environmental Sciences, South Africa Abe Shegro Gerrano --- Agricultural Research Council, Vegetable, Industrial and Medicinal Plants, South Africa Alfred Oduor Odindo --- University of KwaZulu-Natal, Pietermaritzburg campus, College of Agriculture, Engineering and Science, School of Agricultural Earth, and Environmental Sciences, South AfricaGlobal food security faces challenges arising from population growth, climate change, and the prevalence of monoculture agriculture. In addressing these concerns, Bambara groundnut (Vigna subterranean (L.) Verdc.) emerges as a promising crop due to its nutritional richness and resilience in... -
Genome-wide genetic-marker variation uncovers potential stock structuring of oceanic tuna (skipjack) and coastal tuna (kawakawa) within the western Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: FA Mzingirwa --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya NJ McKeown --- Aberystwyth University, United Kingdom GM Okemwa --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya WHH Sauer --- Rhodes University, South Africa JS Halafo --- Instituto Oceanográfico de Moçambique (InOM), Mozambique JG Mshana --- Sokoine University of Agriculture, Tanzania JN Kamau --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya PW Shaw --- Rhodes University, South AfricaTuna and tuna-like species are highly mobile and migratory, and therefore assumed to have single highly connected populations over large ocean regions. However, empirical data on the genetic population structure of such species in the western Indian Ocean (WIO) remain... -
Reproduction, recruitment, growth and mortality of co-occurring species of the intertidal limpet Siphonaria with contrasting reproductive modes
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CD McQuaid --- Rhodes University, South Africa RJ Chambers --- Rhodes University, South AfricaThe pulmonate limpets Siphonaria concinna and S. serrata co-exist intertidally on many South African rocky shores. The two species are similar morphologically and in terms of their intertidal habitat and distribution; both lay gelatinous egg masses on the shore, but... -
Assessment of the inland wetland ecosystem types in South Africa: threats and protection
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H van Deventer --- Council for Scientific and Industrial Research (CSIR), South Africa Jeanne L Nel --- , The NetherlandsEcosystem threat status (ETS) and ecosystem protection levels (EPLs) are headline indicators that can assess freshwater ecosystems at a country-wide scale. A spatial layer of freshwater, inland wetland ecosystem types of South Africa was combined with a range of spatial... -
Powers as Fibonacci sums
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Benjamin Earp-Lynch --- Carleton University, Canada Simon Earp-Lynch --- Carleton University, Canada Omar Kihel --- Brock University, Canada P. Tiebekabe --- Université de Kara, TogoWe examine the equation for positive integers y, a ≥ 2 and k ≥ 3. This equation can be expressed as a problem in terms of the Zeckendorf representations of integers. Using bounds on linear forms in logarithms and Baker-Davenport... -
On elliptic curves assigned to a pair of right triangles with an equal hypotenuse
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Arman Shamsi Zargar --- University of Mohaghegh Ardabili, Iran Seiji Tomita --- Tokyo Software Company (Inc.), JapanConsider a pair of right triangles with an equal hypotenuse. This turns out to solve the diophantine system of equations a 2 + b 2 = c 2 + d 2 = e 2 in integers. To this system we... -
Maker-Breaker domination game played on corona products of graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Athira Divakaran --- Mar Athanasius College, India Tijo James --- Pavanatma College, India Sandi Klavžar --- University of Ljubljana, Slovenia Latha S. Nair --- Mar Athanasius College, IndiaIn the Maker-Breaker domination game, Dominator and Staller play on a graph G by taking turns in which each player selects a not yet played vertex of G. Dominator’s goal is to select all the vertices in a dominating set,... -
Filling the gaps: herpetological checklist of Mayombe National Park and Cabinda Province (Angola) shed light on one of the most unexplored corners of tropical Central Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Javier Lobón-Rovira --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Asociado, Universidade do Porto, Portugal Ninda L Baptista --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Asociado, Universidade do Porto, Portugal Tyron Clark --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa Luke Verburgt --- University of Pretoria, South Africa Gregory FM Jongsma --- New Brunswick Museum, Canada Werner Conradie --- Port Elizabeth Museum, South Africa Luis Veríssimo --- Fundação Kissama, Angola Pedro Vaz Pinto --- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Asociado, Universidade do Porto, PortugalThe global environmental crisis has reinforced the importance of improving the documentation of the geographical distributions of extant species. With this aim, species inventories of specific locations or regions are a high priority, especially so in poorly explored areas. Cabinda... -
Camera trapping observations of the Kloof Frog, Natalobatrachus bonebergi, in South Africa, reveals effects of environmental conditions on breeding behaviour patterns
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: C Acker-Cooper --- Endangered Wildlife Trust, South Africa L Roxburgh --- Endangered Wildlife Trust, South Africa J Tarrant --- Endangered Wildlife Trust, South AfricaThe threatened Kloof Frog (Natalobatrachus bonebergi) is associated with coastal forested rocky streams in the KwaZulu-Natal and Eastern Cape provinces, South Africa. Their expanded toe tips allow them to navigate rocks, branches and leaves, where the species lays distinct egg... -
Using wing bar patterns to identify sex in Crowned Eagles Stephanoaetus coronatus: A misleading field characteristic
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Shane C Sumasgutner --- Centre for Functional Biodiversity, School of Life Sciences, University of KwaZulu-Natal, South Africa Lauren K Common --- University of Vienna, Austria Simon Thomsett --- Soysambu Conservancy, Kenya Colleen T Downs --- Centre for Functional Biodiversity, School of Life Sciences, University of KwaZulu-Natal, South Africa Petra Sumasgutner --- University of Vienna, AustriaAlmost universally, raptors exhibit some degree of sexual size dimorphism, with many species also having substantial sexual dimorphism in plumage patterns. The monophyletic clade ‘booted eagles’ generally do not, except for the Crowned Eagle Stephanoaetus coronatus, which are believed to... -
The quest(ion) of Leaning Towards a Liberal Historiography in Edgar Tekere’s A Lifetime of Struggle (2007) and Cephas Msipa’s In Pursuit of Freedom and Justice: a Memoir (2015)
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Walter Kudzai Barure --- , South AfricaZimbabwe’s historiography is commonly confined to a singular narrative that glorifies the deeds of a few prominent figures while sidelining the contributions and perspectives of other political actors. This paper redirects the narrative focus by examining Edgar Tekere’s A Lifetime... -
Random walk labelings of perfect trees and other graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Sela Fried --- Israel Academic College, Israel Toufik Mansour --- University of Haifa, IsraelA random walk labeling of a graph G is any labeling of G that could have been obtained by performing a random walk on G. Continuing two recent works, we calculate the number of random walk labelings of perfect trees,... -
Soil properties influence tree fall in a fragment of Atlantic Forest in Recife, Pernambuco, Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Maria Salomé de Lima --- Rural Federal University of Pernambuco, Brazil Fernando José Freire --- Rural Federal University of Pernambuco, Brazil Débora de Melo Almeida --- Rural Federal University of Pernambuco, Brazil Brivaldo Gomes de Almeida --- Rural Federal University of Pernambuco, Brazil Renato Lemos dos Santos --- Federal Institute of Education, Science and Technology of Pernambuco, Brazil Luiz Carlos MarangonTrees falling in natural environments can be attributed to tree age, terrain topography, amount of rainfall, wind strength, root type and soil properties. Soil plays a role in nutrient cycling, water retention and distribution, and tree support, and can be... -
Effects of artificial waterpoints on woody species composition and structure in semi-arid communal rangelands, northern Namibia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Johannes Ndeyamo Nuuyoma --- University of Namibia, Namibia Jesaya Nakanyala --- University of Namibia, Namibia Ayana Angassa --- Botswana University of Agriculture and Natural Resources,The provision of artificial water resources for livestock in communal rangelands in arid environments is a major driver of land degradation. This study examined the impact of waterpoints on woody plant species composition and structure in the Omuntele communal rangeland,... -
The perfective aspect in Afaan Oromoo
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Eba Teresa Garoma --- Jimma University, Ethiopia Baye Yimam --- Addis Ababa University, EthiopiaThe perfective aspect in linguistic terms signifies the completion of an action or event, presenting it as a single, undivided unit without delving into its internal components, contrasting with the imperfective aspect that focuses on actions/events with internal structure. This... -
Ukucobelelana ngolwazi olungamagugu ase-Afrika lwesenzo ‘goma’ olusemyalezweni osenkundleni yezokuxhumana iTikTok
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Beryl Babsy Boniwe Xaba --- University of South Africa, South AfricaSekube nokukhalaza okuningi ngokubhalwa kolimi ezinkundleni zokuxhumana. Izingcweti zolimi kanye nabacwaningi bolimi abagculisekile ngokusetshenziswa kolimi kulezi zizindalwazi. Isililo esikhulu sisuswa ukungayilandeli imigomo nemithetho yolimi lwesiZulu uma kubhalwa ezinkundleni zokuxhumana. Lolu cwaningo luhlose ukwethula indlela inkundla yezokuxhumana iTikTok efundisa ngayo ngemvelaphi... -
Ukufundiswa kwemibhalo yobuciko emakilasini esiZulu ngenhloso yokufundisa abafundi ngekhono lokuhlaziya izinkinga zomphakathi
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Nokuthula Ntombenhle Mbata --- University of KwaZulu-Natal, School of Education, Language and Media Studies, Sicelo Ziphozonke Ntshangase --- University of KwaZulu-Natal, School of Education, Language and Media Studies,Inhloso yale athikili ukubheka ukufundiswa kwemibhalo yobuciko emakilasini esiZulu ngenhloso yokufundisa abafundi ngekhono lokuhlaziya izinkinga zomphakathi. Lolu wucwaningo oluyikhwalithethivu, olwethulwa ngendlela esakuxoxa, kusetshenziswa ipharadayimi esakuhumusha. Ucwaningo lubeka ukuthi ukulahlekelwa yisimilo, ubuqili nokungathembeki kuwumthelela wokwehluleka kwesikole, othisha kanye nomphakathi ukutshala ubuntu... -
Nominalisation and semantic shift in selected isiXhosa nouns
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Andiswa Mvanyashe --- Nelson Mandela University, South AfricaThis study addresses the process of nominalisation in isiXhosa to establish its historical development and implications on the writing and sense of words. Nominalisation, an important feature of scientific writing, enables information concentration as well as grammatical functions such as... -
The incidence of Electrocardiographic (ECG) changes suggestive of myocardial infarction in patients attending Kalafong Provincial Tertiary Hospital diabetes clinic
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: BN Xhekwani --- Kalafong Provincial Tertiary Hospital, South Africa M de Villiers --- Kalafong Provincial Tertiary Hospital, South Africa DG van Zyl --- Kalafong Provincial Tertiary Hospital, South AfricaAims: This study aims to determine the incidence of new electrocardiographic (ECG) changes suggestive of myocardial infarction (MI) in diabetic patients, both with and without typical symptoms. Additionally, it seeks to identify other ECG abnormalities indicative of the effects of... -
Bio-cryptography application for sending encrypted information using DNA cipher
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Karima Aksa --- Mostapha Ben Boulaid University, Algeria Oussama Larbi --- Mostapha Ben Boulaid University, Algeria Amira Fourar --- Mostapha Ben Boulaid University, AlgeriaCryptography-combined algorithms are obtained by a combination of algorithms, as their reliability is higher and harder to attack than the component algorithms separately. Thus, the combined algorithms are often known for classical cryptography. The goal of encryption is to make... -
Rapid spread of Euglena sanguinea Ehrenberg (Phylum Euglenophyta) in South African freshwater bodies: A potential threat
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Sanet Janse van Vuuren --- North-West University, South Africa Anatoliy Levanets --- North-West University, South Africa Daniël Erasmus --- North-West University, South AfricaEuglena sanguinea is a red-pigmented euglenid species known for producing the ichthyotoxin euglenophycin, which has been associated with fish mortalities in various freshwater systems. First reported in South Africa from the Kruger National Park in 2016, E. sanguinea has since... -
Aquatic hitchhikers: examining the phoretic associations between blackfly (Diptera: Simuliidae) and mayfly (Ephemeroptera: Heptageniidae, Tricorythidae) larvae in Kenyan river ecosystems
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JM Benjamin --- University of Florida, USA AL Subalusky --- University of Florida, USA W Graf --- Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences (BOKU), AustriaThe interaction known as phoresy, where one organism (the phoront) utilises another (the host) primarily for transport or access to food resources, has been observed among various aquatic invertebrates in Afrotropical rivers. Although documented in multiple species, phoresy’s underlying causes,... -
Effective descent morphisms of ordered families
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Maria Manuel Clementino --- University of Coimbra, CMUC, Portugal Rui Prezado --- University of Coimbra, CMUC, PortugalWe present a characterization of effective descent morphisms in the lax comma category Ord//X when X is a locally complete ordered set, as well as in the antisymmetric setting. -
Diameter of orientations of graphs with given order and number of blocks
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: P. Dankelmann --- University of Johannesburg, South Africa M.J. Morgan --- School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, South Africa E.J. Rivett-Carnac --- University of Johannesburg, South AfricaA strong orientation of a graph G is an assignment of a direction to each edge such that G is strongly connected. The oriented diameter of G is the smallest diameter among all strong orientations of G. A block of... -
Evolution, population structure and morphology of the African Black Duck Anas sparsa and Yellow-billed Duck A. undulata
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Philip Lavretsky --- University of Texas at El Paso, United States Ramsey Russell --- , United States Sara Gonzalez --- University of Texas at El Paso, United States Vergie M Musni --- University of Texas at El Paso, United States Alexis Díaz --- Centro de Ornitología y Biodiversidad (CORBIDI), Peru Joshua I Brown --- University of Texas at El Paso, United StatesBiological conservation requires a fundamental understanding of evolutionary history and established contemporary population genetics. Here, we sequenced mitochondrial DNA (mtDNA) and thousands of nuclear loci across individuals of the African Black Duck Anas sparsa and Yellow-billed Duck A. undulata to... -
A shelf-scale assessment of GLORYS and BRAN ocean reanalysis model outputs for the southern Benguela Upwelling System
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AM Kupczyk --- Fisheries and the Environment (DFFE), South Africa T Lamont --- Fisheries and the Environment (DFFE), South Africa I Halo --- Fisheries and the Environment (DFFE), South Africa CS Russo --- Fisheries and the Environment (DFFE), South Africa T Rixen --- Institute for Geology, Universität Hamburg, Germany N Lahajnar --- Institute for Geology, Universität Hamburg, GermanyThe Benguela Upwelling System, with its high variability and productivity, is challenging to monitor owing to limited in situ ocean observations. Researchers therefore often use ocean reanalysis products to simulate oceanographic conditions. We evaluated the performance of the GLORYS and... -
Trophic interactions of two sympatric small pelagic fishes off the southern coast of Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DPA Quiatuhanga --- University of Namibe, Angola P Morais --- , United States MA Teodósio --- Universidade do Algarve, PortugalNumerous small pelagic fish species are of great economic importance and link the lower and upper levels of the marine food web. The round sardinella Sardinella aurita and flat sardinella S. maderensis coexist along their distribution range in the southeastern... -
Case report: nutritional management of a repaired congenital diaphragmatic hernia
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: S Greyvenstein --- North-West University, South Africa RC Dolman-Macleod --- North-West University, South AfricaCongenital diaphragmatic hernia (CDH) is a rare diaphragm malformation that historically had low survival rates, but advances in care have improved outcomes. This case study discusses the outpatient management of an 8-month-old male infant who survived CDH but, due to... -
Lifestyle patterns and dietary habits of patients living with type 2 diabetes mellitus attending primary healthcare facilities in Limpopo province, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Mosibudi Welhemina Maboya --- Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa, Lufuno Razwiedani --- Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa, Thembi Violet Simbeni --- Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa, Lindiwe Priscilla Cele --- Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa, Ntlogeleng Mabina Mogale --- Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa, -
The general position number under vertex and edge removal
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Pakanun Dokyeesun --- Institute of Mathematics, Physics and Mechanics, Slovenia Sandi Klavžar --- University of Ljubljana, Slovenia Jing Tian --- School of Science, Zhejiang University of Science and Technology, P.R. ChinaLet gp(G) be the general position number of a graph G. It is proved that gp(G − x) ≤ 2gp(G) holds for any vertex x of a connected graph G and that if x lies in some gp-set of G,... -
New properties of some classes of Saphar type operators
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ayoub Ghorbel --- University of Sfax, Tunisia Snežana Č. Živković-Zlatanović --- University of Niš, SerbiaThis paper explores additional properties of some classes of Saphar type operators, namely left Drazin invertible, essentially left Drazin invertible, right Drazin invertible, and essentially right Drazin invertible operators on Banach spaces, building upon the groundwork laid in [8] and... -
Characterizations of *-Ricci-Bourguignon solitons and contact Ricci-Bourguignon almost solitons
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Sourav Nayak --- Indian Institute of Technology – Hyderabad, India Dhriti Sundar Patra --- Indian Institute of Technology – Hyderabad, India Hemangi Madhusudan Shah --- Harish-Chandra Research Institute, A CI of Homi Bhabha National Institute, IndiaIn this paper, we first study *-Ricci-Bourguignon solitons (in short, *-RB solitons) and find their geometric characterizations on Sasakian manifolds. We show that if a Sasakian metric g admits a non-trivial *-RB soliton, then it is -homothetically fixed null η-Einstein... -
Vertical heterogeneity of chemical constituents and in vitro ruminal fermentation parameters in browse tree leaves
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Kgaogelo P Meso --- North-West University, South Africa Caven M Mnisi --- North-West University, South Africa Martin P Hughes --- University of the West Indies, Abubeker Hassen --- University of Pretoria, South Africa Solomon T Beyene --- University of Fort Hare, Victor Mlambo --- University of Mpumalanga, South AfricaRepeated herbivory has the potential to induce adaptive chemical changes in the leaves of browse plants, which can alter their nutritive value. This study examined the interactive effect of tree species and harvest height on chemical composition and in vitro... -
Using a low-cost drone to assess herbaceous biomass and quality in the Sahelian Rangeland ecosystems
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Haftay Hailu Gebremedhin --- College of Agriculture and Environmental Sciences, Haramaya University, Ethiopia Paulo Salgado --- Pôle Pastoralisme et Zones Sèches, Pôle de recherche de Hann, Senegal Cofélas Fassinou --- Pôle Pastoralisme et Zones Sèches, Pôle de recherche de Hann, Senegal Simon Taugourdeau --- Pôle Pastoralisme et Zones Sèches, Pôle de recherche de Hann, SenegalExisting ways of assessing rangeland plant biomass and nutritional quality mostly rely on field surveys, which are difficult to generalise across plots, along with laboratory-based techniques that entail lengthy pre-processing procedures. As a solution, drones have emerged as a promising... -
Reflection on students’ use of English and isiXhosa in meaning-making at a higher education institution
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Zameka Paula Sijadu --- Stellenbosch University, South AfricaTranslanguaging has emerged as an effective pedagogical method in various educational settings where the language of instruction differs from the students’ native languages. In this article, I explore the use of English and isiXhosa in teaching and learning for meaning-making... -
Doke revisited – Combining Zulu ‘vowel verbs with variant non-vowel forms’ and ‘latent-vowel verbs’ in a single category
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Michel Lafon --- University of Pretoria, South Africa Mongezi Bolofo --- University of South Africa,Doke’s influence on Zulu description cannot be overstated. It underlies, to this day, most grammatical works on the language. Our attempt here is to do away with a subtle distinction Doke introduced by merging the two sub-categories of what he... -
Tight Toughness Bounds for Fractional (k, n)-Critical Graphs with Large n
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Wei Gao --- School of Mathematics, Hohai University, China Weifan Wang --- School of Mathematical Sciences, Zhejiang Normal University, China Yaojun Chen --- School of Mathematics, Nanjing University, ChinaA graph G is called a fractional (k, n)-critical graph if G − V ′ admits a fractional k-factor for any V ′ ⊆ V (G) with |V′| = n. The main result in this paper states the following facts:... -
Assessment of seed quality through rapid tests: a bibliometric analysis
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos Luiz da Silva --- Federal Rural University of Pernambuco, Brazil Marcone Moreira Santos --- Federal Rural University of Pernambuco, Brazil Eliane Cristina Sampaio de Freitas --- Federal Rural University of Pernambuco, Brazil Raquel Maria de Oliveira Pires --- Federal University of Lavras, Brazil Moema Barbosa de Sousa --- Federal Rural University of Pernambuco, Brazil Paulo César da Silva Santos --- Federal Rural University of Pernambuco, Brazil Erika Rayra Lima Nonato --- Federal Rural University of Pernambuco, Brazil Gabriel Alves de Lima --- Federal Rural University of Pernambuco, Brazil Ricardo Gallo --- Federal Rural University of Pernambuco, BrazilSeed quality is essential to ensure success in plant production. Traditionally, germination testing is widely used to assess seed viability, but it is a time-consuming process. Consequently, rapid tests have been increasingly explored due to their efficiency and speed. This... -
Developing and validating a training package for the provision of telephone crisis intervention services to children and adolescents at risk of suicide
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Maedeh Parvizi --- Iran University of Medical Sciences, Iran Zahra Shahrivar --- Tehran University of Medical Sciences, Iran Nasrin Dodangi --- Psychosis Research Center, University of Social Welfare and Rehabilitation Sciences, Iran Salman Ghaderi --- Social Emergency Center of the Welfare Organization, Iran Saeid Norouzi --- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Iran Elham Salari --- Tehran University of Medical Sciences, Iran Mojgan Khademi --- Shahid Beheshti University of Medical Sciences, Iran Fariba Arabgol --- Shahid Beheshti University of Medical Sciences, Iran Javad Mahmoudi-Gharaei --- Tehran University of Medical Sciences, IranBackground: Telephone crisis intervention is a readily available and discreet method through which troubled youths can seek assistance. -
Enhancing global equity returns with trend-following and tail risk hedging overlays
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Bruno Schwalbach --- University of the Witwatersrand Johannesburg, South Africa Christo Auret --- University of the Witwatersrand Johannesburg, South AfricaThis paper demonstrates that overlaying a combination of trend-following and tail risk hedging strategies onto a global equity portfolio significantly enhances performance. These strategies are complementary. Tail risk hedging mitigates equity risk effectively during sudden market crashes, while trend-following supports... -
Coping skills and smartphone addiction in adolescents with ADHD: A predictive model and relationship
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Tayfun Kara --- Alanya Alaaddin Keykubat University, Turkey Orhan Kocaman --- Alanya Alaaddin Keykubat University, Turkey Pınar Aydoğan Avşar --- Alanya Alaaddin Keykubat University, Turkey Tacettin Kuru --- Alanya Training and Research Hospital, TurkeyBackground: We sought to examine the relationship between smartphone addiction and coping skills in adolescents diagnosed with attention-deficit/hyperactivity disorder (ADHD), together with potential predictive factors. -
3. “Be active!” Revisiting the South African food-based dietary guideline for activity
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Botha CR --- Centre of Excellence for Nutrition, North-West University, Wright HH --- Centre of Excellence for Nutrition, North-West University, Moss SJ --- Physical Activity, Sport and Recreation, North-West University, Kolbe-Alexander TL --- UCT/MRC Exercise Science and Sports Medicine Research Unit Faculty of Health Sciences, University of Cape Town,The objective of this paper was to review current evidence on physical activity for health in order to support the food-based dietary guideline (FBDG) “Be active!”. Physical activity, defined as at least 30 minutes of moderate-intensity physical activity per day... -
Longitudinal associations between lifestyle changes during the COVID-19 pandemic and distress among children and adolescents in Montréal
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Adrien Saucier --- Centre for Public Health Research, University of Montreal, Canada Katia Charland --- Centre for Public Health Research, University of Montreal, Canada Britt McKinnon --- Centre for Public Health Research, University of Montreal, Canada Florence Dupont --- Centre for Public Health Research, University of Montreal, Canada Isabelle Laurin --- University of Montreal, Canada Cat Tuong Nguyen --- University of Montreal, Canada Laura Pierce --- Centre for Public Health Research, University of Montreal, Canada Margot Barbosa Da Torre --- Centre for Public Health Research, University of Montreal, Canada Islem Cheriet --- Centre for Public Health Research, University of Montreal, Canada Caroline Quach --- University of Montreal, Canada Kate Zinszer --- Centre for Public Health Research, University of Montreal, CanadaBackground: COVID-19 mitigation measures disrupted many youths’ lives. The burden that pandemic changes induced on children and adolescent’s mental health requires further research. -
Constructions of Home in the Unhomely: Home-making in Nnedi Okorafor’s Africanfuturist Narratives
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Joseph Kwanya --- Rhodes University, South AfricaIn this essay, I examine the representation of home in African speculative fiction, focusing on three works by Nnedi Okorafor: Who Fears Death (2010), The Book of Phoenix (2015), and the short story “Mother of Invention” (2018). I argue that... -
Uphicothonzulu ngokwenkcazobungcali yenkcubekontlalo ngokobuhlanga kwibali elifutshane lesiXhosa elithi Umgcini-mangcwaba
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Mlamli Diko --- University of South Africa (UNISA),Iiyantlukwano ngokobuhlanga kunye nocalucalulo zibonisa ukunyathelela phezulu, nto leyo ethi ithintele ubumbano nentsebenziswano phakathi kweentlanga ngeentlanga kwintlalo nenkcubeko yoMzantsi Afrika. Nakubeni umgaqonkqubo wocalucalulo wabhangiswa ngomnyaka we1994, abaNtsundu kunye namaNgesi abonakalisa ukungqubana nokujongana ngezikhondo zamehlo kwiimeko ezithile njengoko kuvela kwibali elifutshane... -
Making the foreign familiar: (De)scribing linguistic adaptation in Tshivenḓa
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Moffat Sebola --- University of Limpopo, South AfricaThis article describes the process of loanword adaptation in Tshivenḓa. The description foregrounds the factors that are often assumed to play a role in the alterations that adopted and adapted words in Tshivenḓa undergo. Conceptual in approach, the article analyses... -
ChiShona lexical interference in Zimbabwean isiNdebele: A case of selected schools in Gweru
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Cordial Bhebe --- University of the Free State, Martha Khosa --- University of the Free State,The study explores syntactic interference involving isiNdebele and ChiShona in the teaching and learning of isiNdebele in a dominant ChiShona-speaking environment. The study was undertaken in secondary schools in Gweru in Zimbabwe. The investigation adopted a qualitative paradigm, while the... -
War metaphors as names for medical concepts in Sesotho newspaper HIV and AIDS communication
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Ntšoeu Seepheephe --- National University of Lesotho, LesothoThe study examines the behaviour and the ideological functions of war metaphors that are used in Sesotho newspaper communication on HIV and AIDS. Using the dynamic systems approach towards metaphor, I explore the use of these metaphors in three major... -
Using Digital Earth Africa to monitor chlorophyll-a concentration and detect harmful algal blooms in Suguti Bay, Lake Victoria, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JE Gimode --- Ardhi University, Tanzania AD Msusa --- Ardhi University, Tanzania Z Ngereja --- Ardhi University, TanzaniaLake Victoria is a vital source of drinking water for millions, necessitating continuous monitoring of chlorophyll-a (Chl-a) concentrations to assess its trophic status and support sustainable water resource management. This study aimed to provide a scalable, cost-effective alternative to traditional... -
First record of the pandemic fungus Batrachochytrium dendrobatidis in wild amphibians of the Mauritius Island
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Albert Martínez-Silvestre --- , Spain Owen Griffiths --- La Vanille Nature Park, Ile Maurice Gilbert Moutia --- La Vanille Nature Park, Ile Maurice Barbora Thumsová --- Asociación Herpetológica Española (AHE), Spain Jaime Bosch --- IMIB-Research Unit of Biodiversity (University of Oviedo, CSIC, Principality of Asturias), SpainMauritius hosts two established non-native amphibian species: the Mascarene Grass Frog (Ptychadena mascareniensis) and the Guttural Toad (Sclerophrys gutturalis). In this study, we screened individuals of both species for the presence of Batrachochytrium dendrobatidis (Bd), Batrachochytrium salamandrivorans (Bsal), and Ranavirus... -
A new Rain Frog (Anura: Brevicipitidae; Breviceps) from the KwaZulu-Natal Midlands, South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: LH du Preez --- North-West University, South Africa EC Netherlands --- North-West University, South Africa LR Minter --- North-West University, South AfricaBreviceps, an African genus of fossorial frogs, comprises 20 species most of which occur in South Africa. In this study we describe a new species that differs morphologically from its closest congener Breviceps verrucosus, in the position of the mouth... -
Call description and extended range of Phrynobatrachus mayokoensis in Gabon
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Ryan van Huyssteen --- Ecological Services Ltd, British Virgin Islands Melissa Petford --- Ecological Services Ltd, British Virgin Islands Marius Burger --- Ecological Services Ltd, British Virgin Islands Mark-Oliver Rödel --- , Germany Joris Ngoulou --- Ecological Services Ltd, British Virgin Islands Abraham Bamba Kaya --- Ecological Services Ltd, British Virgin Islands Etienne Akomo Okoue --- Ecological Services Ltd, British Virgin Islands Jerome Gaugris --- Ecological Services Ltd, British Virgin IslandsThis study presents the first description of the advertisement call of Phrynobatrachus mayokoensis and reports a new locality record for this species in Gabon. During June 2022, two specimens were found in the Baniaka region, Haut-Ogooué Province, Gabon. The call... -
The amphibians and reptiles of Ngel Nyaki Forest Reserve on the Mambilla Plateau of eastern Nigeria
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Denise Arroyo-Lambaer --- Instituto de Biología, Universidad Nacional Autónoma de México, México Lauren A Scheinberg --- , USA Jens V Vindum --- , USA Walter P Tapondjou --- University of Florida, USA Morgan G Davidson --- University of Florida, USA Hazel Chapman --- University of Canterbury, New Zealand David C Blackburn --- , USAThe herpetofauna of the montane forests of Taraba State in eastern Nigeria is poorly known. During the twentieth century, two short surveys of amphibian and reptile diversity were conducted on the Mambilla Plateau, but these did not generate a comprehensive... -
On automorphism groups of the conjugacy class type Cayley graphs on the symmetric and alternating groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: O. Habineza --- University of the Western Cape, South Africa E. Mwambene --- University of the Western Cape, South AfricaThe automorphism groups of Cayley graphs on symmetric groups, Cay(G, S), where S is a complete set of transpositions have been determined. In a similar spirit, automorphism groups of Cayley graphs Cay(An , S) on alternating groups An , where... -
A note on the cube polynomials of Fibonacci and Lucas-Run graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jianxin Wei --- School of Mathematics and Statistics Science, Ludong University, P.R. ChinaThe cube polynomials of the Fibonacci-run graph and Lucas-run graph are determined, and a conjecture on the relation between them is proved. Note that Mollard (2025) [9] has considered deeply this question and obtained many general conclusions. Here we study... -
Sustaining smartphone-based payment services among youth: Extending ECM with habit and pre-adoption expectancies
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Rameshkumar Subramanian --- Central University of Punjab, India Ashique Ali K. A. --- SVKM's NMIMS Deemed-to-be University, IndiaSmartphone-based payment services (SBPS) are gaining incredible popularity among the Indian youth due to their tech-savvy behaviour and desire for ease and convenience. The intention to continue using SBPS by youngsters will have a long-lasting effect on India’s vision to... -
Growth patterns and condition index of rock oysters Saccostrea cucullata in relation to river influence in southeastern Madagascar
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Masimana --- Institut d’Enseignement Supérieur d’Anôsy, Université de Toliara, Madagascar A Andrisoa --- Aix-Marseille University, CNRS, IRD, INRAE, CEREGE, FranceSaccostrea cucullata is the dominant species of rock oyster (family Ostreidae) in southeastern Madagascar. Despite its economic and ecological importance, information on its biology and ecology is scarce. This study investigated the growth, shell length–weight relationship, and condition index (tissue... -
Physical activity and exercise for older people living with HIV – the perceptions of health care professionals
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Levin Chetty --- University of KwaZulu-Natal, South Africa Saul Cobbing --- University of KwaZulu-Natal, South Africa Verusia Chetty --- University of KwaZulu-Natal, South AfricaAs people age with HIV, the prescription of physical activity should be included as part of their comprehensive medical management. The higher prevalence of comorbidities, polypharmacy, drug interactions and end-stage complications in this specific population requires a multidisciplinary health care... -
GeoHostel: Location-based recommendation of hostels in the context of higher education through geospatial technology
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nana Yaw Asabere --- Accra Technical University, Ghana Gare Lawson --- Raycom Technologies, Ghana Bernice Quartey-Papafio --- Ghana Police Service, Ghana Marcellinus Kuuboore --- University of Professional Studies, Ghana Nana Yaw Duodu --- Accra Technical University, GhanaAn efficient data management system is essential in the field of student housing to guarantee the availability of high-quality data that can make it easier to find appropriate hostels. Although recommender systems concerning hotels and tourism points of interest (POI)... -
Nutritional management of a patient with acute myeloid leukaemia complicated by gastrointestinal symptoms and typhlitis
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Zelda Hugo --- Pretoria East Hospital,Leukaemia is the 11th most prevalent cancer worldwide, with acute myeloid leukaemia (AML) representing an acute and highly aggressive subtype that requires urgent medical intervention. Although national data on incidence and mortality in South Africa remain limited, an epidemiological study... -
The role of nutrition in patients with pemphigus receiving prolonged corticosteroid therapy
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Fiona Wongkar --- Udayana University/Ngoerah Hospital, Indonesia Nyoman Suryawati --- Udayana University/Ngoerah Hospital, Indonesia Agustinus I Wayan Harimawan --- Udayana University/Ngoerah Hospital, Indonesia Made Candra Wijanadi --- Udayana University/Ngoerah Hospital, IndonesiaPemphigus is a rare autoimmune blistering disorder that affects the skin and mucous membranes, characterised by acantholysis due to IgG-mediated autoantibody interference with desmoglein-mediated keratinocyte adhesion. Despite advances in immunosuppressive therapy, managing pemphigus remains a challenge. Both disease pathology and... -
Correlates of HIV pre- and post-exposure prophylaxis uptake among female university students in Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ivan Segawa --- College of Health Sciences, Makerere University, Uganda Sabrina Bakeera-Kitaka --- College of Health Sciences, Makerere University, Uganda Lorraine Oriokot --- College of Health Sciences, Makerere University, Uganda Kenneth Ssebambulidde --- The Infectious Diseases Institute Limited, College of Health Sciences, Makerere University, Uganda Timothy R. Muwonge --- The Infectious Diseases Institute Limited, College of Health Sciences, Makerere University, Uganda Kevin Ouma Ojiambo --- College of Health Sciences, Makerere University, Uganda Andrew Mujugira --- The Infectious Diseases Institute Limited, College of Health Sciences, Makerere University, UgandaFemale university students engaging in high-risk sexual behaviours, such as transactional sex or unprotected sex, are eligible for HIV pre- and post-exposure prophylaxis (PrEP/PEP). This study aimed to determine the uptake and correlates of PEP and PrEP use among female... -
Access to PrEP for cis and transgender women: Developing and implementing a community-based intervention adapted to populations exposed to HIV in Mali, Morocco, and Mauritius
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Mustapha Sodqi --- Association de Lutte Contre le Sida, Morocco Amal Ben moussa --- Association de Lutte Contre le Sida, Morocco Rosemary Delabre --- , France Rime Barrakad --- Association de Lutte Contre le Sida, Morocco Luis Sagaon Teyssier --- Aix-Marseille University, France Niloufer Khodabocus --- Lutte contre le SIDA, Mauritius Sofia Fathi --- Association de Lutte Contre le Sida, Morocco Fodié Diallo --- ARCAD Santé PLUS, Mali Patrice Monvoisin --- Lutte contre le SIDA, Mauritius Bintou Keita Dembele --- ARCAD Santé PLUS, Mali Annette Treebhoobun --- Lutte contre le SIDA, Mauritius Naoual Laaziz --- Association de Lutte Contre le Sida, Morocco Lahoucine Ouarsas --- Association de Lutte Contre le Sida, Morocco Daniela Rojas Castro --- , France Mehdi Karkouri --- Association de Lutte Contre le Sida, MoroccoBackground: Pre-exposure prophylaxis (PrEP) is recommended as part of a comprehensive HIV prevention approach, but its uptake among women, particularly those in key populations, remains limited. -
A Portuguese urban vegetable garden under the gaze of hospitality
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Cynthia Luderer --- Social Sciences Institute, University of Minho, PortugalThis work concerns an urban vegetable garden in the north-west of Portugal and aims to describe the hospitality surrounding this environment. This study resulted from a two-year field investigation, which was methodologically driven by ethnography and supported by the anthropology... -
Minority cuisines of Istanbul and their contribution to the formation of Istanbul cuisine
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Banu Özden --- Istanbul Medipol University, TürkiyeIstanbul’s rich historical background has given rise to a cosmopolitan culinary culture. The Ottoman Empire played a significant role in shaping the local culinary culture, which was further enriched by the societies that coexisted under its auspices. Alongside the food... -
Phenotypic variance in an acoustic signal: a potentially sexually selected behaviour in Cape Clapper Larks Corypha apiata
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Zofia Wardynska --- Imperial College London, United Kingdom Holly Bennett --- Imperial College London, United Kingdom Xavier JM Mahele --- Imperial College London, United Kingdom Saskia IL Pearce --- Imperial College London, United Kingdom Ksenia Potapova --- Imperial College London, United Kingdom Sue Anne Zollinger --- Manchester Metropolitan University, United Kingdom Julia Schroeder --- Imperial College London, United KingdomCourtship displays provide important insight into sexual selection, evolution and the roles of communication signals in behavioural ecology. Any trait indicating individual quality must display phenotypic variation. Studying this variation can provide insight into the uses of acoustic cues in... -
Pre- and post-emergent herbicides tested as alternatives to glyphosate for vegetation management during pine and eucalypt establishment, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Keith M Little --- Nelson Mandela University, South Africa Ira Tzitzika --- Nelson Mandela University, South AfricaPre-emergent, selective and desiccant herbicides were tested for the control of competing vegetation in a pine and eucalypt trial and, if successful, to reduce the reliance on manual ring-weeding and/or glyphosate (current practice). Both trials consisted of ten treatments replicated... -
Unveiling Kianda: a multifaceted symbol in Luanda, Angola
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Kyeri Kim --- Hankuk University of Foreign Studies Global Campus, Republic of KoreaThis article explores how Kianda, an (un)official urban symbol of Luanda, the capital of Angola, is rooted in the cosmological worldview of residents of Luanda’s Cabo Island (Ilha do Cabo, also known as Ilha de Luanda) and how it has... -
The movements of adult leerfish Lichia amia in the Breede Estuary, Western Cape, South Africa: insights from acoustic telemetry
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WM Kilian --- Rhodes University, South Africa TS Murray --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa JD Filmalter --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa PD Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa TF Næsje --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa RJ Wasserman --- Rhodes University, South AfricaLeerfish Lichia amia inhabit estuaries as juveniles before moving between estuaries and the marine environment as sub-adults and adults. While adults remain mostly in the marine environment, philopatry has been observed, with individuals returning to areas previously used, including estuaries... -
Influence of the Benguela Upwelling System on the genetic connectivity of blacktail seabream Diplodus capensis across southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WF Olivier --- Genetics and Microbiology, University of Pretoria, South Africa WM Potts --- Rhodes University, South Africa A-R Childs --- Rhodes University, South Africa C Santos --- Agostinho Neto University, Angola PW Shaw --- Aberystwyth University, R Henriques --- Genetics and Microbiology, University of Pretoria, South AfricaOceanographic features such as upwelling cells and currents contribute to shaping the evolutionary history of marine fishes, including species that may be important socio-economic resources. However, the impacts of these barriers are often cryptic and may change, particularly in a... -
Comparing the activity of exploited and unexploited populations of a reef-dwelling seabream, Chrysoblephus laticeps, during an extreme upwelling and cold-spell event
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NT Mlotshwa --- Rhodes University, South Africa MR Skeeles --- Rhodes University, South Africa MI Duncan --- Rhodes University, South Africa C Muller --- Rhodes University, South Africa WM Potts --- Rhodes University, South Africa AC Winkler --- Rhodes University, South Africa A-R Childs --- Rhodes University, South AfricaAlong the south coast of South Africa, extreme upwelling events lead to rapid temperature declines and prolonged marine cold-spells, which have, on occasion, led to large-scale mortalities of coastal fishes. In a somewhat antagonistic process, fishing exploitation has been shown... -
Individual variability in the thermal limits of juvenile dusky kob Argyrosomus japonicus from a permanently open estuary
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Frachet --- Rhodes University Department of Ichthyology and Fisheries Sciences, South Africa A-R Childs --- Rhodes University Department of Ichthyology and Fisheries Sciences, South Africa AC Winkler --- Rhodes University Department of Ichthyology and Fisheries Sciences, South Africa MW Farthing --- Rhodes University Department of Ichthyology and Fisheries Sciences, South Africa CD Hempel --- Rhodes University Department of Ichthyology and Fisheries Sciences, South Africa WM Potts --- Rhodes University Department of Ichthyology and Fisheries Sciences, South AfricaGlobally, fish are facing the pressure of increasing thermal variability, which challenges the physiological capacity and resilience of species at the level of the individual, population and community. As transition zones, estuarine ecosystems are becoming increasingly thermally dynamic, which affects... -
Pastures established on rehabilitated surface coal mined land: an assessment of forage production and implications for livestock grazing
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Emmanuel Nkosinathi Cele --- University of Pretoria, South Africa Monde Rapiya --- University of Pretoria, South Africa Wayne Sanders --- University of Pretoria, South Africa Wayne Truter --- Enterprises University of Pretoria, South AfricaCurrently, land rehabilitation best practice in South Africa is to revegetate ameliorated soil with grass mixtures. These grasses have valuable grazing potential that can deliver great benefits to livestock farmers. However, due to paucity of research and published findings, the... -
Simulated rangeland conditions and seasonal variations influence soil quality in semi-arid central South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JDJ Marx --- University of the Free State, South Africa E Kotzé --- University of the Free State, South Africa JJ van Tol --- University of the Free State, South Africa PF Loke --- University of the Free State, South AfricaThe study examined long-term effects of rangeland conditions and seasonal variations on soil quality without confounding grazing effects. Samples were collected seasonally from good, moderate, poor, bare and cultivated rangeland conditions at soil depths of 0–10 cm and analysed for... -
DNA-based species identification as a tool to distinguish invasive Nassella species in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anthony Mapaura --- University of the Free State, South Africa Kim Canavan --- University of the Free State, South Africa David M Richardson --- Stellenbosch University, South Africa Nicholas C Le Maitre --- Stellenbosch University, South Africa V Ralph Clark --- University of the Free State, South Africa Sandy-Lynn Steenhuisen --- University of the Free State, South AfricaThe three non-native Nassella species (N. neesiana, N. tenuissima, and N. trichotoma) occurring in the South African montane grasslands are morphologically cryptic, and hence difficult to distinguish from several taxonomically complex, co-occurring tufted C3 perennial grass genera (e.g. Festuca), and... -
The moving structure of reality in Gadamer’s method of interpretation: A philosophy of life in the making of history
Item type: Journal Article • Journal: Indo-Pacific Journal of Phenomenology • Authors: Andrew Fuyarchuk --- Yorkville University, CanadaThe reorientation in hermeneutics from matters of textual interpretation and historically effected consciousness to “hermeneutic realism” and immanent metaphysics has created questions about our place in both history and nature. They are as mutually exclusive of one another as linear... -
Bounds on the spread and trace norm of the adjacency matrix of a graph
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bilal Ahmad Rather --- Shandong University of Technology, China Hilal A. Ganie --- Government Degree College Uri, India M. Imran --- Prince Mohammad Bin Fahd University, Saudi ArabiaThe trace norm of the adjacency matrix A(G) of a graph G is the sum of absolute values of the eigenvalues of A(G) and it is well-known in the literature under the name energy (graph energy) of G. The spread... -
Comparison of three methods to assess pre-harvest sprouting in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: SI Hull --- Stellenbosch University, South Africa PA Swanepoel --- Stellenbosch University, South Africa WC Botes --- Stellenbosch University, South Africa C Mutengwa --- University of Fort Hare, South AfricaPre-harvest sprouting (PHS) in wheat (Triticum aestivum L.) is an increasing concern, as climate variability alters rainfall patterns and air temperatures during harvest, intensifying risk in many cereal-producing regions. The untimely germination of the grain, PHS, is caused by germination... -
Phosphorus and nitrogen fertiliser effects on anion-exchange-resin phosphorus and sugarcane yield in Plinthic soils of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sandile Siphesihle Mthimkhulu --- Mangosuthu University of Technology, South Africa Sizwe Vincent Mbona --- Durban University of Technology, South AfricaEfficient phosphorus (P) extraction methods are vital for optimising sugarcane production, yet no single chemical extractant currently suits the diverse soil conditions across South Africa’s sugarcane regions. This study explored the potential of anion-exchange-resin phosphorus (AER-P) as a possible alternative... -
on the complete solutions of a generalized Lebesgue-Ramanujan-Nagell equation
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Kalyan Chakraborty --- SRM University AP, Mangalagiri-Mandal, India Azizul Hoque --- Faculty of Science, Rangapara College, IndiaWe consider the generalized Lebesgue-Ramanujan-Nagell equation x 2 + 17 k 41 ℓ 59 m = 2 δ yn in the unknown integers x ≥ 1, y > 1, n ≥ 3 and k, ℓ, m ≥ 0 satisfying gcd(x, y)... -
Mycorrhizal fungi in Acacia mearnsii plantations and native fragments of the Pampas biome, southern Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Etienne Winagraski --- Universidade Federal do Paraná, Brazil Celso Garcia Auer --- Universidade Federal do Paraná, Brazil Pedro Henrique Riboldi Monteiro --- Universidade Federal do Paraná, Brazil Antônio Rioyei Higa --- Universidade Federal do Paraná, Brazil Glaciela Kaschuk --- Universidade Federal do Paraná, BrazilBlack wattle (Acacia mearnsii) was introduced to southern Brazil in the 1930s without any documented history of microbial inoculation. This study tested the hypothesis that black wattle introduction does not harm indigenous arbuscular mycorrhizal fungi (AMF) communities or reduce soil... -
Nutritional management of a patient with a small bowel neuroendocrine tumour and obstruction: a South African case study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Kirsten E Drake --- Groote Schuur Hospital, South AfricaSmall bowel neuroendocrine tumours (SBNETs) arise from enterochromaffin cells, most commonly in the terminal ileum. Functional tumours may secrete hormones, which can lead to carcinoid syndrome, whereas non-functional tumours often present later with symptoms of mechanical obstruction. Malnutrition is common... -
Polar Kangaroos of Type E6
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Yannick Neyt --- Ghent University, Belgium Hendrik Van Maldeghem --- Ghent University, BelgiumA collineation of a point-line geometry is called a kangaroo if its displacement spectrum has a gap; that is, at least one certain distance smaller than the diameter of the geometry cannot occur between a point and its image. In... -
Estimates for the Pre-Schwarzian norm for certain subclasses of analytic functions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Rashid Ali --- Government College University Faisalabad, Pakistan Mohsan Raza --- Government College University Faisalabad, PakistanFor λ ≥ 1, let be the class of analytic functions f in the open unit disc defined by . Similarly, for the class is defined by . In this article, we present estimates for the pre-Schwarzian norm of functions... -
Nehari manifold approach for a singular multi-phase variable exponent problem
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mustafa Avci --- Athabasca University, CanadaThis paper is concerned with a singular multi-phase problem with variable singularities. The main tool used is the Nehari manifold approach. Existence of at least two positive solutions with positive-negative energy levels are obtained. For the illustration of the main... -
An efficient hybrid transform algorithm for image compression using a matrix rank-based optimization approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: D. Linett Sophia --- Erode Sengunthar Engineering College, India S. Kavitha --- Nandha Engineering College, IndiaThe digital images play a major part in variety of fields such medical, satellite, remote sensing, etc. Advancements in information technology have resulted in a huge number of digital images to be stored and transmitted. Since the demand for storage... -
Ukuphithikeza nokugxobha ingcingane yeelwimi zaseAfrika njengeelwimi ezenziwa ubunkcubabuchopho
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Simthembile Xeketwana --- Stellenbosch University, South AfricaIilwimi zaseAfrika kudala zaba nobungqondi kwaye obo bungqondi kumele bugqobhozele kwiindlela ezi lwimi ezisetyenziswa ngayo, ncakasana kumaziko emfundo ephakamileyo. Ngoko ke, iilwimi zaseAfrika aziqalanga ukuba nobungqondi emva kowe1994, okanye ukufika kwamamishinari kweli lo Mzantsi Afrika, neAfrika iphela. Ngokukhokelwa yinkcazobungcali yasemva... -
The phonological structure of South African Sign Language (SASL) toponyms
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Patrick Sibanda --- University of Free State, South Africa Sarah Siyavoshi --- University of Free State, South AfricaThis study is framed within the prosodic model, and sought to analyse the phonological parameters of handshape, location, palm orientation, movement, and non-manual markers in the formation of SASL toponyms. Place name signs are a cultural and sociolinguistic marker used... -
Ubuciko bokwethiwa kwamagama abalingiswa emanovelini abhalwa ngemuva konyaka wezi-2000: kubhekwa ukwethiwa kwabalingiswa ukuthi kuyafana nokwetha jikelele
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Lindani Sthembele Maphumulo --- University of Western Cape, South Africa Mzamo Hlengwa --- University of Free State, South AfricaNgokwevamile igama liqukathe izinto ezithile ezihambisana nokwethiwa kwalo (Lubisi, 2002; De Klerk and Bosch, 1995: 69). Igama liqukethe ubuntu kanye nobunjalo bakhe lowo owethiwe lelo gama kepha ezinye izinhlanga zilibuka njengelebuli esetshenziswa ukwetha ukuze izinto zikwazi ukuhlukaniseka. Isifundo sokwethiwa kwamagama... -
Philosophical and ideological intertextual resonances in OK Matsepe and Vonani Bila’s selected poems
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Nelson Ratau --- University of Mpumalanga, South Africa James Seanego --- University of Limpopo, South AfricaThis article explores the philosophical and ideological intertextual resonances between OK Matsepe’s Ge wa ditšhila ka moka re ka o hlaswa and Vonani Bila’s The Toilet Cleaner at OR Tambo Airport. It argues that the two poems share thematic, ideological,... -
Growth potential and productivity of the green macroalgae Ulva reticulata in a sustainable farming system in a coastal lagoon at Bambous Virieux, Mauritius
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Nazurally --- Department of Agricultural and Food Science, University of Mauritius, Mauritius D Beehary-Panray --- Environmental Protection and Conservation Organisation (EPCO), Resilient Island Endeavour (RISE) Project, Mauritius EC Gatteschi --- Cooperazione Internazionale Sud Sud (CISS), Resilient Island Endeavour (RISE) Project, ItalyUlva reticulata is a fast-growing green macroalga with high bioremediation and economic potential. Cultivation of this seaweed at Bambous Virieux in southeast Mauritius was undertaken to evaluate its growth potential and biological feasibility in a tropical lagoon. Over a 30-day... -
Marine gastropods as potential sources of medicinal and nutraceutical compounds
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TT Kereeditse --- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa (UNISA), South Africa YAT Ngandjui --- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa (UNISA), South Africa I Kamika --- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa (UNISA), South Africa K de Bruyn --- Agriculture and Environmental Science Laboratories, College of Agriculture and Environmental Sciences, University of South Africa (UNISA), South Africa LM Madikizela --- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa (UNISA), South Africa TAM Msagati --- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa (UNISA), South AfricaGastropods make up the most diverse class of molluscs. Marine species of gastropods include a vast array of sea slugs and sea snails, which are among the most diverse and ecologically significant groups of marine invertebrates. Exploring these fascinating marine... -
Spatiotemporal shape variation in sagittal otoliths of spotted grunter Pomadasys commersonnii in South African estuaries
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: V Coetzee --- Department of Biological Sciences, University of Cape Town, South Africa S Kerwath --- Department of Biological Sciences, University of Cape Town, South Africa S Lamberth --- Department of Forestry, Fisheries and the Environment (DFFE), South Africa D Parker --- Department of Biological Sciences, University of Cape Town, South AfricaThe morphological structure of fish otoliths is under dual regulation by genetic and environmental factors, and has been successfully used to aid stock delineation. This study examined whether differences in sagittal otolith shape outlines could be used to delineate potential... -
Comparative growth and carotenoid production in the green microalga Dunaliella salina from marine and continental ecosystems: harnessing environmental diversity for sustainable industrial applications
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Benabouche --- Biotechnology Laboratory, Specialised Centre for Valorisation and Technology of Marine Products (CSVTPM), National Institute of Marine Research (INRH), Morocco M Chikhaoui --- Biotechnology Laboratory, Specialised Centre for Valorisation and Technology of Marine Products (CSVTPM), National Institute of Marine Research (INRH), Morocco H Baazizi --- Laboratory of Quality Control, Specialised Centre for Valorisation and Technology of Marine Products (CSVTPM), National Institute of Marine Research (INRH), Morocco F El Filali --- Laboratory of Quality Control, Specialised Centre for Valorisation and Technology of Marine Products (CSVTPM), National Institute of Marine Research (INRH), Morocco A Banaoui --- Laboratory of Aquatic Systems: Marine and Continental Environments (AQUAMAR), Faculty of Sciences, Ibn Zohr University, MoroccoIn Morocco, diverse saline ecosystems support both industrial salt production and the growth of Dunaliella salina, a halophilic unicellular green microalga in class Chlorophyceae, and well-known for its applications in aquaculture, cosmetics, food and pharmaceuticals owing to its significant carotenoid-producing... -
Physico-chemical variables influencing the distribution and abundance of macroinvertebrates in salt marsh habitats of the Berg River Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NT Mngomezulu --- Department of Plant Sciences, University of the Free State, South Africa N Peer --- Department of Botany and Zoology, Stellenbosch University, South Africa A Rajkaran --- Department of Biodiversity and Conservation Biology, University of the Western Cape, South Africa DA Veldkornet --- Department of Plant Sciences, University of the Free State, South AfricaMacroinvertebrates such as snails and crabs influence aspects of salt marsh structure and function through herbivory and bioturbation. However, the effects of physico-chemical variables and habitat composition on their abundance and distribution remain underexplored. This study examined the influence of... -
Seasonal consumption of Thamnochortus spicigerus (Restionaceae) by eland is associated with plant sex and nutrient status
Item type: Journal Article • Journal: African Zoology • Authors: Petro Botha --- Department of Botany and Zoology, Stellenbosch University, South Africa Bruce Anderson --- Department of Botany and Zoology, Stellenbosch University, South AfricaHistoric distributions of large herbivores in the Fynbos Biome remain poorly described and, despite ongoing reintroductions, their dietary strategies and forage selection in the Fynbos Biome are understudied. We monitored an introduction of eland into Cape Flats Dune Strandveld vegetation,... -
Fish community dynamics of seasonal rivers of the Incomati Basin, Kruger National Park, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Kaiser-Reichel --- School of Biology and Environmental Sciences, University of Mpumalanga, South Africa GC O’Brien --- Gulbali Institute, Charles Sturt University, Australia R Petersen --- Garden Route National Park, South Africa National Parks, South Africa TW Khoza --- School of Biology and Environmental Sciences, University of Mpumalanga, South Africa A Van der Merwe --- School of Biology and Environmental Sciences, University of Mpumalanga, South Africa E Riddell --- Kruger National Park, South Africa National Parks, South Africa N Smit --- Unit for Environmental Sciences and Management, North-West University, South Africa T Dalu --- School of Biology and Environmental Sciences, University of Mpumalanga, South AfricaSeasonal rivers play a critical role in shaping aquatic ecosystems and provide essential ecosystem services in freshwater systems. Due to a limited understanding of seasonal rivers and how ecological indicators such as fish communities are structured, it is important to... -
Cognitive Narratology and Disability in Taha Hussein’s Canonical Literary Works
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Shahd Alshammari --- Gulf University for Science and Technology, Kuwait Encarnación Sánchez Arenas --- University of Seville, SpainThe seminal works of Taha Hussein, the Egyptian writer who was sobriquetically labelled ‘The Dean of Arabic Literature’, include the autobiographical trilogy, The Days, and his novel, The Call of the Curlew. Both present complementary explorations of disability narratives and... -
The Frank graph
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Efruz Özlem Mersin --- Aksaray University, Turkey Ayşe Dilek Maden --- Selcuk University, Turkey Mustafa Bahşi --- Aksaray University, TurkeyThis paper introduces the Frank graph, a special weighted digraph with self-loops whose adjacency matrix corresponds to the Frank matrix, a special Max matrix. We derive bounds for the spectral radius and energy of the graph and illustrate these results... -
On the {2}-domination number of rooted product graphs
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A. Cabrera-Martínez --- Universidad de Córdoba, Spain A. Conchado Peiró --- Universitat Politècnica de València, Spain J.M. Rueda-Vázquez --- Universidad de Córdoba, SpainLet G be a nontrivial graph with vertex set V (G). A function f : V (G) → {0, 1, 2} is called a {2}-dominating function on G if ∑ u ∈NG [v] f(u) ≥ 2 for every v... -
Composition operators on the weighted BMOA spaces with closed range
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Rikio Yoneda --- Institute of Human and Social Sciences, Kanazawa University, JapanWe study the composition operator C φ with closed range on the weighted space : -
Effects of nonlocal source terms on Kirchhoff-type double phase equations with variable exponents: Existence of three distinct solutions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Khaled Kefi --- Center for Scientific Research and Entrepreneurship, Northern Border University, Saudi Arabia Haikel Ouerghi --- Department of Quantitative Methods, Jendouba University, Research Laboratory of Mathematics and Applications, Tunisia Khaled Benali --- Department of Mathematics, Faculty of Sciences of Gabes, Research Laboratory of Mathematics and Applications, Tunisia Nguyen Thanh Chung --- Faculty of Mathematics and Information Technology, The University of Danang - University of Science and Education, VietnamThis paper investigates a class of Kirchhoff-type double phase problems distinguished by the inclusion of two nonlocal source terms and formulated in the framework of variable exponent Sobolev spaces. By applying a variant of Bonanno’s critical point theorem [12], we...
