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Reductions in Plant Species Richness under Stands of Alien Trees and Shrubs in the Fynbos Biome
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.M. Richardson --- Jonkershoek Forestry Research Centre, I. A.W. Macdonald --- , G.G. Forsyth --- Jonkershoek Forestry Research Centre,The reduction of species richness of indigenous plants is one of the major problems associated with the presence of dense stands of invasive alien trees and shrubs in the Fynbos Biome of the Cape Province, South Africa. A synthesis was... -
Evaluating Forestry Land During Inflationary Times
Item type: Journal Article • Journal: South African Forestry Journal • Authors: H. J.E. Uys --- Department of Forest Science,The Land Expectation Value criterion has been used since 1849 to calculate the value of forestry land. It was, however, developed in a static financial environment, and is no longer suitable for land valuation in today's dynamic financial environment. This... -
Role of Eucalypt Plantations in Timber Supply and Forest Conservation in Sub-Saharan Africa
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- Institute for Commercial Forestry Research, South AfricaThe role of eucalypt plantations in timber supply and forest conservation in Sub-Saharan Africa was investigated. The annual destruction of 11,5 million ha of tropical forest is highlighted, the various causes indicated and the controversy whether fast-growing plantations and woodlots... -
Distribution, Size and Ownership of Forests in the Southern Cape
Item type: Journal Article • Journal: South African Forestry Journal • Authors: C.J. Geldenhuys --- Saasveld Forestry Research Centre,Indigenous forest of the southern Cape as delimited on 1:50 000 maps was analysed for distribution, size and ownership in six landscape zones: mountains, foothill, coastal platform, river valley, coastal scarp and dunes. I tested the hypothesis that forest distribution... -
Comparison of Eucalyptus grandis Provenances and Seed Orchards in a Frost Frequent Environment
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.L. Rockwood --- Department of Forestry, USA G.F. Meskimen --- , USAAn international provenance trial of Eucalyptus grandis was established in southern Florida in 1980 and measured for growth and frost-tolerance through 8,8 years. The trial compared 20 Australian provenances 1) among themselves and 2) with seed orchard stock from Florida... -
Herbicide treatments applied to stems and stumps of bugweed, Solanum mauritianum
Item type: Journal Article • Journal: South African Forestry Journal • Authors: R.P. Denny --- Cedara Weeds Laboratory, South Africa J.M. Goodall --- Cedara Weeds Laboratory, South AfricaHerbicide treatments applied to stems and stumps are necessary for bugweed, Solanum mauritianum, Scop because it is not always possible to spray the aerial parts when the plants are at an ideal height. Triclopyr in diesel and 2,4-D:2,4-DP ready-to-use were... -
Land Valuation with a Limited Planning Horizon
Item type: Journal Article • Journal: South African Forestry Journal • Authors: H. J.E. Uys --- Department of Forest Science, H. Kotze --- Department of Forest Science,The forestry industry in South Africa operates within a dynamic environment. Rotations are relatively short, land use conversion takes place regularly and company ownership changes frequently. Foresters in the private sector are therefore reluctant to use Land Expectation Value with... -
The Changing Landscape—is there Room for Forestry in the New South Africa?
Item type: Journal Article • Journal: South African Forestry Journal • Authors: GuyA. Cellier --- Mondi Forests,South Africa is going through a period of radical change, and traditionally disadvantaged people are expecting access to resources and opportunities that have thus far been denied them. -
Analysis of Stable Isotopes of Xylem Water from Plantation Trees in E. Transvaal and Zululand Indicate they Utilised Ground water During Drought of 1992
Item type: Journal Article • Journal: South African Forestry Journal • Authors: J.J. Midgley --- , South Africa S. Talma --- , South Africa D. Scott --- , South Africa B. Olbrich --- , South Africa G.F. van Wyk --- , South AfricaWe investigated the stable isotopic signature of xylem sap of mature plantation trees and the associated ground water at sites in Zululand and E. Transvaal. The survey took place mainly during the drought of 1992. Results indicated a range of... -
Are Pine Plantations “Inhospitable Seas” around Remnant Native Habitat within South-western Cape Forestry Areas?
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A.J. Armstrong --- Department of Nature Conservation, South Africa H.J. van Hensbergen --- Department of Nature Conservation, South Africa D.F. Scott --- Jonkershoek Forestry Research Centre, South Africa S.J. Milton --- , South AfricaSome areas of forestry estates, including unplantable ones, may be zoned and managed for nature conservation. This paper is an analysis of the results of studies of plants, birds and small mammals at Jonkershoek, Stellenbosch, to determine whether pine plantations... -
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... -
Conservation Developments in South African Forestry
Item type: Journal Article • Journal: South African Forestry Journal • Authors: R. McC. Pott --- ,The historical development of environmental conservational activities within the South African Forestry Industry is followed, and the changing emphasis from the conservation of the remaining indigenous forests (pre-1900) to water conservation, to natural assets and unplanted areas is highlighted. The... -
Optimising stocking rate under commercial and subsistence pastoralism optimisering van veelading by kommersiele en bestaansveeboerdery
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M.T. Mentis --- Department of Grassland Science,Hopes for a single criterion of overstocking are forlorn. Livestock may be kept for any of many purposes, and the stocking rate optimal for one is not necessarily so for another. Conflicts might be resolved by (1) recognising the likely... -
A model for predicting livemass gain from stocking rate and annual rainfall
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.I. Bransby --- Department of Grassland Science,The relationship between livemass gain and stocking rate was established for young beef animals grazing kikuyu and Coastcross II pastures in each of five grazing seasons. The annual rainfall within these seasons ranged from 506 mm to 990 mm. Relationships... -
Conservative stocking or maximum profit: A grazing management dilemma?
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region), P.G. King --- Department of Agriculture (Eastern Cape Region),Swards in the False Thornveld of the Eastern Cape are generally stocked considerably in excess of the rate currently recommended for maximised production on a sustained basis. Economic analysis of the relationship between stocking rate and production per ha reveals... -
Pasture‐use patterns on dairy and beef farms in the natal midlands
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.A.H. Heard --- , N.M. Tainton --- Department of Grassland Science, P.J. Edwards --- Late of Department of Agriculture (Natal Region),Pasture sites for each of the species grown are classified for both dryland and irrigated pastures in the Natal Midlands. Only six species viz. kikuyu, Italian ryegrass, Eragrostis curvula, Festuca arundinacea (tall fescue), Dactylis glomerata (cocksfoot) and Trifolium repens (white... -
A model for predicting long term economic optimum stocking rates for beef cattle grazing dryland pastures
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.I. Bransby --- Department of Grassland Science,Previous models relating profit to stocking rate have not taken into account annual variation in rainfall. A model is developed here to allow for this factor. The frequency distribution of annual rainfall is used to demonstrate how the stocking rate... -
Effect of continuous grazing in the dohne sourveld on species composition and basal cover
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.F. du Toit --- , A.J. Aucamp --- ,In a grazing trial conducted at the Dohne Agricultural Research Station, natural grassland was grazed continuously for 36 years with cattle. In a second investigation conducted on similar grassland, paddocks were grazed or rested, in all combinations of the four... -
Die wiskundige simulering van koolhidraattranslokasie in natuurlike grasveld1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H J Fouché --- Departement van Landbou en Watervoorsiening (Vrystaatstreek), JM De Jager --- Departement Landbouweerkunde, J Booysen --- Departement van Landbou en Watervoorsiening (Karoostreek),Die groeifunksies benodig vir die simulasie van produksie van ‘n Themeda triandra‐grasveld met behulp van die PUTU 11 simulasiemodel is ontwikkel. Vir die ontwikkeling van die model is die veldproduksiedata van die 1980/81 groeiseisoen gebruik waarna dit suksesvol, vir drie... -
Influence of climatic and edaphic factors on the distribution of eragrostis lehmanniana nees in Arizona, USA
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J R Cox --- US Department of Agriculture, USA G B Ruyle --- Renewable Natural Resources, USALehmann lovegrass (Eragrostis lehmanniana Nees) was introduced into Arizona, USA, from South Africa in 1932 and has since been sown throughout the southwestern USA and Northern Mexico. The species is well adapted in southeastern Arizona where it has been sown... -
Yield and morphological responses of a forage sorghum to mefluidide
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D I Bransby --- , A G Matches --- , USA C R Richardson --- , USADue to rapid growth, stem build‐up in forage sorghum crops often leads to considerable wastage by animals and consequent loss of production. In this study the potential of the chemical plant growth regulator, mefluidide, for modifying the morphology of forage... -
Tegniek vir die bepaling van die hoeveelheid staande droë benutbare materiaal in sentrale hoër karooveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J G V Joubert --- Departement Akkerbou en Weiding,Die hoeveelheid benutbare materiaal (kg. ha‐1) word bereken vanaf die aantal plante per hektaar en die gemiddelde droë materiaal opbrengs per plant op ‘n 40 persent snoeibasis. Die kroonverspreidingspersentasie en kroondeursnit afmetings van die spesies word gebruik in die berekening... -
The effect of seeding rate and weed control on the establishment of Rhodes grass in the Eastern Cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: R. A. Ingpen --- , C. J. G. LeRoux --- , T. Daines --- , E. Oosthuysen --- ,The effect of four seeding rates (3; 6; 12 and 24 kg/ha), four methods of weed control (nil, mowing, 4 l/ha of 2,4‐D amine and hand weeding) and two times of cutting (late boot stage and end of season) on... -
The development of veld assessment in the northern Transvaal savanna I. Red Turfveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M.H. Friedel --- Division of Wildlife and Rangelands Research, Australia A.C. Blackmore --- ,Grazing‐induced gradients in pasture species composition were characterized for the red turfveld of the Northern Transvaal savanna. A proposed classification of pasture species response to grazing was developed and the influence of state variables and driving forces other than grazing... -
Seasonal changes in the quality of diet selected by cattle grazing the natal sour sandveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.J. O'Reagain --- Dept. Agriculture and Water Supply, M.T. Mentis --- Centre for Resource Ecology,Seasonal changes in dietary quality were measured using steers fistulated at the oesophagus. From spring through to winter, crude protein (CP), in vitro digestibility (IVD) and leaf percentage in the diet declined significantly while percentage dead material increased significantly. Consumption... -
The development of veld assessment in the northern Transvaal savanna II. Mixed bushveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M.H. Friedel --- Division of Wildlife and Rangelands Research, AustraliaDifferences in pasture species composition as a consequence of grazing were used to develop a proposed classification of pasture species response to grazing, for both the Combretum apiculatum and the Acacia tortilis communities of the northern Transvaal mixed bushveld. The... -
Plant palatability assessment and its implications for plant‐herbivore relations
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Owen‐Smith --- Resource Ecology Group, Department of Zoology, S.M. Cooper --- Resource Ecology Group, Department of Zoology,An objective method used to assess the palatability of the foliage of woody plant species to kudus, impalas and goats is described. Observations were made on the feeding behaviour of tame animals in the Nylslvey Nature Reserve in northern Transvaal... -
Evapotranspirasie in drie plantgemeenskappe van ‘n Rhigozum trichotomum habitat te upington
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: A. Moore --- , J.A.J. Van Eck --- , J.P. Van Niekerk --- , B.L. Robertson --- ,Evapotranspirasie in drie plantgemeenskappe van ‘n R. trichotomum habitat, naamlik, suiwer gras, suiwer R. trichotomum en ‘n gemengde stand van R. trichotomum en gras is gedurende die 1985–86 groeiseisoen bestudeer. Drie persele van elke plantgemeenskap is hidrologies geisoleer, besproei en... -
Exploring the potential of the descending‐point method to measure utilization in karoo veld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: F.O. Hobson --- Department of Agriculture (eastern Cape Region), A.S.J. Baarnhoorn --- Department of Agriculture (Karoo Region),The descending‐point method of vegetation survey proved effective in measuring meaningful plant cover changes during a grazing period. No significant changes in basal cover or plant height were detected. Changes in canopy spread and canopy cover could only be used... -
Selecting for palatability in festuca arundinacea schreb
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.C.W. Goodenough --- Department of Agriculture and Water Supply, A. Smith --- Department of Agriculture and Water Supply, A.R.J. Morrison --- Department of Agriculture and Water Supply,Plants of numerous Festuca arundinacea cultivars and strains were evaluated for palatability, using two methods; a relative softness of leaf technique and a grazing technique. The softness of leaf technique, as measured by hand, provided a useful method to distinguish... -
Groei en produksie van ‘n aanal aangeplante weidings onder beweiding
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.A. Pieterse --- Dept Plantproduksie, J.O. Grunow --- Dept Plantproduksie, N.F.G. Rethman --- Dept Plantproduksie,Die groei en produksie onder beweiding van ‘n aantal aangeplante weidings is met behulp van die verskilmetode bepaal. Uit die data verkry in die proef is dit duidelik dat indien daar besproeiingswater beskikbaar is, groen materiaal dwarsdeur die jaar voorsien... -
How economic are the farming units of Leliefontein, Namaqualand?
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: FionaM. Archer --- Department of Botany, Republic of South Africa M.T. Hoffman --- Department of Botany, Republic of South Africa J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region), Republic of South AfricaNomadic pastoralism has been practised in Leliefontein for centuries. In 1984, the area was formally divided into 47 so‐called ‘economic units’ on the assumption that this agricultural approach would (a) promote development in the region and (b) introduce conservation management... -
A preliminary account of growth characteristics and seed germination of Cassia mimosoides L. in Dohne Sourveld
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 AfricaAn autecological study of Cassia mimosoides L., which invades mismanaged Dohne Sourveld, was initiated at the Agricultural Research Institute, Dohne. A study of the growth characteristics revealed that the nature of the root distribution enabled the plant to take up... -
The effect of veld condition on the quality of diet selected by cattle grazing the Natal Sour Sandveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.J. O'Reagain --- Department of Agricultural Development, Republic of South Africa M.T. Mentis --- Department of Botany, Republic of South AfricaThe quality of diet selected by steers fistulated at the oesophagous was related to veld condition in a simulated rotational grazing system on the Natal Sour Sandveld. Six camps, ranging in veld condition score from 8,5 to 53%, were grazed... -
“n Voorlopige evaluasie van eenjarige, wintergroen weidings met speenlammers, in die Oos‐Kaapse suurveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: T.G. Coetzee --- Departement van Landbou‐ontwikkeling (Oos‐Kaapstreek), Republiek van Suid‐Afrika G.R. Barnes --- Departement van Landbou‐ontwikkeling (Oos‐Kaapstreek), Republiek van Suid‐Afrika W.S.W. Trollope --- Agronomie Departement, Landboufakulteit, CiskeiA preliminary evaluation of annual, wintergreen pastures using weaned lambs in the eastern Cape sourveld. Animal production and feed availability on oats, vetch and oats/vetch pastures were evaluated under continuous grazing, at three stocking rates, using weaned lambs. The oats... -
Evaluation of three techniques for measuring grass leaf area1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.W. Daphne --- Department of Grassland Science, Republic of South Africa P.J.K. Zacharias --- Department of Grassland Science, Republic of South Africa A.C. Hansen --- Department of Agricultural Engineering, Republic of South AfricaThree leaf area measuring techniques were compared. Although statistical considerations received priority, practical issues such as economy of time, labour and finance, were also evaluated. The electronic light interception planimeter and the squared grid method (SGM) are already in common... -
The value of subtropical grass pastures for use as foggage on the eastern Transvaal Highveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N.F.G. Rethman --- , Republic of South Africa C.C. de Witt --- , Republic of South AfricaThe utilization of frosted herbage of Pennisetwn clandestinwn, Paspalum notation, Digitaria eriantha, Cynodon sp. and Chloris gayana by Merino wethers during the winter confirmed the potential of this practice as an alternative winter feeding strategy under Highveld conditions. P. clandestinwn... -
The production of four ryegrass cultivars oversown at various seeding rates into irrigated kikuyu
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.I. Harris --- Department of Agricultural Development, Republic of South Africa P.E. Bartholomew --- Department of Agricultural Development, Republic of South AfricaAn irrigated kikuyu pasture was oversown, in late March, with four ryegrass cultivars at four seeding rates at Cedara (Natal Mistbelt) and n'Tabamhlope (Highland Sourveld). The oversowing procedure shows promise with the cultivars producing well at both sites. There were... -
Effect of enzyme additives on kikuyu silage quality
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M.C.V. de Figueiredo --- Department of Agricultural Development, Republic of South AfricaChopped kikuyu (Pennisetum clandestinum) grass of low digestibility and low in non‐structural carbohydrates was treated with three commercial enzyme preparations, namely, Celluclast, SP 249 and Silo Guard II. These enzymes were added to the kikuyu prior to ensiling in laboratory... -
The complemental role of dryland cultivated pastures in market‐related beef production from semi‐arid rangeland
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: L.G. duPisani --- Department of Agricultural Development, Republic of South Africa T.E. Skinner --- Department of Agricultural Development, Republic of South AfricaRangeland condition is a decisive factor in determining the income:cost ratio of production and hence in the profitability of any beef production enterprise. By maintaining and/or improving rangeland condition, the beef producer can buffer himself against low profitability. Cultivated pastures... -
The national grazing strategy of the Republic of South Africa Objectives, achievements and future challenges
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.F. du Toit --- Department of Agricultural Development, Republic of South Africa A.J. Aucamp --- , Republic of South Africa J.J. Bruwer --- Department of Agricultural Development, Republic of South AfricaOver the past few years various measures have been applied to address the problem of the retrogression of southern African rangelands. However, it has become apparent that many of these measures were ad hoc and not part of a long‐term... -
Veld management in the communal areas of Ciskei
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: R.G. Forbes --- Department of Livestock and Pasture Science, Ciskei W.S.W. Trollope --- Department of Livestock and Pasture Science, CiskeiVeld management in Ciskei is based predominantly on a communal land tenure system, and livestock is produced under a ‘Group Ranch’ system. Stocking rates are excessively high and consequently veld degradation is severe, resulting in a lowered carrying capacity and... -
A model for the evaluation of different production strategies for animal production from rangeland in developing areas: An overview
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: F.D. Richardson --- Department of Applied Mathematics, Republic of South Africa B.D. Hahn --- Department of Applied Mathematics, Republic of South Africa P.I. Wilke --- Department of Animal Science, Republic of South AfricaAn interactive user‐friendly computer package is being developed to assist planners and managers with the evaluation of different livestock production strategies in semi‐arid regions. It comprises a hierarchy of simulation models that predict over time the effects of past and... -
The Potch System: An approach to the management of semi‐arid grasslands in southern Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: R.H. Drewes --- Department of Agricultural Development, Republic of South AfricaA host of grassland management systems have been published and recommended. Whereas earlier approaches to grassland management emphasized the systematic resting aspect, the systems published since 1966 have tended to stress the degree of utilization of the grassland sward. In... -
Seasonal changes in nutrient content under three defoliation treatments in two coastal grassland communities of Transkei
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.M. Shackleton --- Department of Botany, Transkei M.T. Mentis --- Department of Botany, Republic of South AfricaChanges in nutrient concentrations were monitored over a two‐year period in two coastal grassland communities. Dry matter digestibility, crude protein, phosphorus, potassium, calcium and magnesium were determined from hand‐clipped samples of experimental treatments; namely, burning with and without subsequent grazing... -
Patterns of plant selection by grazing cattle in two savanna grasslands: A plant's eye view
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: T.G. O'Connor --- Resource Ecology Group, Department of Botany, Republic of South AfricaThe amount of grazing experienced by individual tufts of the most abundant perennial grasses of two Transvaal savannas was monitored at regular intervals for two growing seasons. In general, Setaria incrassata and Themeda triandra were heavily grazed, Bothriochloa insculpla and... -
Preferential utilization of pans by springbok (Antidorcas marsupialis)
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: S.J. Milton --- FitzPatrick Institute, Republic of South Africa W.R.J. Dean --- FitzPatrick Institute, Republic of South Africa C.P. Marincowitz --- , Republic of South AfricaForage utilization by springbok in pans and surrounding habitats was compared at one karroid shrubland site and two desert grassland sites and was found to be greater in pans than on adjacent plains and dunes. Springbok used pan areas for... -
Effects of animal activity on the absorption rate of soils in the southern Karoo, South Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: W.R.J. Dean --- FitzPatrick Institute, Republic of South AfricaThe rates of absorption into various microsites in Karoo soils were compared. The absorption of water by hard, bare intershrub soils was significantly increased by the presence of emergence holes of adult cicadas (Homoptera: Cicadidae) and near nest‐mounds of the... -
Importance of rainfall oscillations in agricultural planning
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.L. du Pisani --- ,Evidence seems to indicate that the rainfall in the summer rainfall area of the RSA exhibits an oscillatory nature with a period of 16–20 years. To help maize farmers in planning for a dry or wet cycle the most recent... -
Quantitative criteria for distinguishing melanic from vertic soil horizons in the central Kruger National Park
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.W. Fraser --- Department of Geography, T.H. van Rooyen --- Department of Geography, E. Verster --- Department of Geography,Criteria based on shrink-swell potential, viz. linear shrinkage and COLErod, were used to distinguish between melanic and vertic soil horizons of the Mooiplaas region in central Kruger National Park. For linear shrinkage the proposed boundary value separating melanic and vertic... -
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... -
Soil-site relationships in the Roodepoort area, Transvaal
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.H. van Rooyen --- Department of Geography,Fifty hillslope profiles with associated soils were examined in the Roodepoort area, Transvaal, to determine the relationships between soil and site characteristics, as well as the applicability of the toposequence concept. A mesoscale approach was adopted, which implied a relationship... -
Assessment of recent drought severity for natural grassland at three locations
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.A. Dyer --- Crop Production Division, Canada J.M. de Jager --- Department of Agrometeorology, Republic of South AfricaThe relative severity of drought in natural grassland during three growing seasons was analyzed for three South African weather stations. Computer simulation of grassland water use, based upon weather records, was used to quantify drought and to compare the conditions... -
Die effek van plantpopulasie op die saadopbrengs van sonneblomkultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.L. Loubser --- , C.L. Grimbeek --- , L. A.S. Robertson --- , Beulah Bronkhorst --- , C. Serfontein --- , J.C. van der Sandt --- ,'n Aantal sonneblombasters is vergelyk by drie plantpopulasies oor twee seisoene te Ermelo, Sandvet en Warmbad. Die doel was om die kompensasievermoë van kultivars te bepaal vir 'n swak stand. Onder laepotensiaal-toestande was die kultivar X plantpopulasie-interaksie nie beduidend nie,... -
On the concept of leaching requirement for salinity control
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.M. du Plessis --- ,The concept of irrigating in excess of plant water requirement to restrict soil profile salinity to acceptable limits is well established. The tolerable upper salinity limit is used to calculate the leaching requirement. This upper limit is determined mainly by... -
Chemical control of some broadleaved weeds which grow during winter in untilled maize lands
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. E.L. Thomas --- Summer Grain Sub-Centre,Several experiments have been done at Cedara in attempts to control broadleaved weeds in unfilled lands during winter. A number of herbicide treatments were tested on Conyza spp., Coronopus didymus, Gnaphalium spp., Hypochoeris radicata, Oenothera rosea and Taraxacum officinale. Where... -
Evaluering van braakstelsels vir droëlandkoringverbouing in die Oranje-Vrystaat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Engelbrecht --- , Republiek van Suid-Afrika A.J. der Westhuizen --- , Republiek van Suid-Afrika G.D. Joubert --- , Republiek van Suid-AfrikaDrie produksiestelsels vir droëlandkoring is te Glen en Bethlehem geëvalueer. Die kortbraak was vyf tot ses maande, intermediêre-braak was 12 tot 13 maande en langbraak was 17 maande. Glen verteenwoordig 'n semi-ariede somerreëngebied waar die proefgrond 'n plantbeskikbare-waterstoorkapasiteit van 148... -
Soils derived from granite in two Mt. Garnet toposequences, North Queensland, Australia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E. Verster --- Department of Geography, Republic of South AfricaTwo toposequences derived from granite in the Mt. Garnet area, North Queensland, were examined to determine the detailed soil - landform relationships in order to facilitate subsequent broad-scale mapping of the soil resource. The dominant landsurface feature is gently sloping,... -
Die invloed van planttyd en plantdigtheid op die duurte en tempo van graanvul van mielies (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P. Pretorius --- , Republiek van Suid-Afrika J.J. Human --- Departement Agronomie, Republiek van Suid-AfrikaDie invloed van planttyd en plantdigtheid op die lengte van die graanvulperiode en die graanvultempo van mielies is in veldproewe ondersoek. Plantdigtheid het die periode en tempo van graanvul nie betekenisvol beïnvloed nie. Die graanvulperiode het betekenisvol toegeneem terwyl die... -
Sterile Lanterna camara: fact or theory
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Spies --- Department of Agriculture and Water Supply, Republic of South Africa Henriette du Plessis --- Department of Agriculture and Water Supply, Republic of South AfricaAttempts are being made to legalize the sale of ‘sterile’ Lantana camara varieties in South Africa. Several so-called sterile varieties have been investigated cytogenetically. All these. plants proved to be triploids.(2n = 33). A mechanism exists through which an unexpectedly... -
Effects of plant density and row spacing on Lupiniis albus cv. Kiev
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: V.D. Wassermann --- Department of Agriculture, Republic of South AfricaTwo field trials in which the effects of plant density and row spacing on L. albus cv. Kiev were studied, are described. One trial was carried out on dryland and the Other under irrigation. Plant densities ranging from c. 20... -
'n Vogstremmingsindeks vir gebruik in besproeiing van katoen
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Dippenaar --- , Republiek van Suid-Afrika Catharina Weyers --- , Republiek van Suid-AfrikaDie behoefte bestaan om plantparameters as kritiese indikatore aan te wend om besproeiingsbestuur te vergemaklik. Die blaarwaterpotensiaal (ψb) van katoen en relatiewe turgiditeit (RT%) van blaarskyfies is gedurende 1983 tot 1985 en tydens die 1986/87-seisoen bepaal. Hierdie metings is op... -
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... -
A simple, accurate method of estimating maximum total evaporation from a wheat crop during the daylight period
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.H. van Zyl --- Department of Agrometeorology, Republic of South Africa J.M. de Jager --- Department of Agrometeorology, Republic of South Africa C.J. Maree --- Department of Agrometeorology, Republic of South AfricaThe use of empirical relationships for the calculation of the energy and aerodynamic components of the Penman-Monteith equation were tested against measured data. Accurate estimates of maximum total evaporation, Em, from a wheat crop were obtained. The empirical equation utilizes... -
Invloed van nitraat:ammoniumverhoudings op die ontwikkeling van Zea mays L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F.G. Adriaanse --- , Republiek van Suid-Afrika J.J. Human --- Departement Agronomie en Hortologie, Republiek van Suid-AfrikaDie invloed van drie nitraat:ammoniumverhoudings by twee stikstofkonsentrasies op planteienskappe is met blomtyd en na fisiologiese volwassenheid vir suiwerlyne gemeet. 'n Kwartssandkultuur is as groeimedium in 'n glashuis gebruik. Toenemende NH4 +-verhoudings het planthoogtes, blaaroppervlaktes en droëmateriaalproduksie van verskillende plantkomponente... -
The effect of date of planting on the fibre properties of four cotton cultivars grown under irrigation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.I. Greeff --- , Republic of South Africa J.J. Human --- Department of Agronomy, Republic of South AfricaThe effects of date of planting on the fibre properties of four cotton cultivars, Acala 1517–70, Albar 70C, Deltapine 5826 and Albacala CS-2, were investigated under irrigated conditions over a 3-year period near Groblersdal. Six dates of planting at fortnightly... -
The yield potential and crude protein content of five rhizomatous and stoloniferous grass pastures in the escarpment areas of the eastern Transvaal
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. F.G. Rethman --- Athole Research Station, Department of Agriculture & Water Supply, Republic of South Africa C. C. de Witt --- Athole Research Station, Department of Agriculture & Water Supply, Republic of South AfricaWhilst Cynodon aethiopicus and the Cynodon hybrid, ‘Coast Cross II’, proved to be unsuited to the cool high rainfall conditions, Acroceras macrum, Pennisetum clandestinum and Digitarla scalarum were well adapted. There was little difference in yield potential between local and... -
Costing the initial clearance of alien Acacia species invading fynbos vegetation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: I. A.W. Macdonald --- , Republic of South Africa C. Wissel --- , Federal Republic of GermanyThe costs of the initial clearing of mixed stands of the alien Acacia cyclops and A. saligna invading fynbos vegetation were compared in a replicated trial on the Pella Fynbos Research Site. Costs were estimated using a regression-based model of... -
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... -
Recommended modifications to the spectrophotometric determination of molybdenum as Fe[MoO(SCN)5]
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F. Bessinger --- , Republic of South AfricaThe classical method for the determination of molybdenum in plant material by the formation of an iron-molybdenum- thiocyanate complex, which is extracted with alcohols, ethers and carbon tetrachloride from a dilute acid solution, is basically very suitable for the detection... -
Die invloed van kort hittestremmings op groei en opbrengs van aartappels
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.S. Hammes --- Departement Plantproduksie, Republiek van Suid-Afrika E.A. Beyers --- Departement Plantproduksie, Republiek van Suid-Afrika Helen Birnbaum --- Departement van Biologie, IsraelPlante van die kultivars Up-to-date en BP1 is in 'n glashuis gekweek en op verskillende tye gedurende die groeiperiode vir vyf opeenvolgende dae aan hoë temperature (35/25°C dag/nag) blootgestel. Die kultivars het eenders op die behandelings gereageer. Die hittestremmingsbehandelings het... -
Bepaling van donkerrespirasie by mielies (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.H. du Preez --- Landboufakulteit, Republiek van Suid-Afrika J.J. Human --- Landboufakulteit, Republiek van Suid-Afrika L.P. de Bruyn --- Landboufakulteit, Republiek van Suid-AfrikaTwee mieliecultivars wat in potte onder glashuistoestande met optimale watervoorsiening gekweek is, is gedurende die agtblaarstadium en stuifmeelstort tot baardverskyning aan stremming onderwerp deur watertoediening te weerhou. Die CO2-uitvloeitempo is op sekere tye gedurende die nagperiode gemonitor. Hierdie waardes het... -
Host plant preference by 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 Africa J. van den Berg --- Summer Grain Centre, Republic of South AfricaSome graminaceous fodder crops were compared to maize and grain sorghum for ovipositional preference by Busseola fusca (Fuller) under laboratory conditions. The infestation potential of different crops was increased by the incidence of tillering, infestation being enhanced by the availability... -
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... -
Application of the calcium-calcichrome colour reaction to the spectrophotometric determination of calcium in plant material
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Xing-Chu Qiu --- , People's Republic of China Ying-Quan Zhu --- , People's Republic of ChinaA highly selective spectrophotometric method has been developed for the determination of micro-amounts of calcium in plant material with calcichrome as the colour reagent. The absorption maximum of the complex is at 520 nm. At this wavelength, Beer's law is... -
The effect of seeding rate, timing of nitrogen application and frequency of irrigation on wheat growth, yield and water use
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Nel --- , Republic of South Africa F.J. Dijkhuis --- , Republic of South AfricaWheat (Triticum aestivum cv. SST66) was planted in a 2 × 2 × 2 factorial field experiment. Factors investigated were seeding rate, timing of nitrogen application and frequency of irrigation. The two seeding rates were 85 and 170 kg ha−1... -
Refinement and validation of the PUTU wheat crop growth model 2. Leaf area expansion
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 AfricaA refined leaf growth submodel was incorporated in an existing wheat crop growth model. The submodel calculated daily green leaf area expansion per plant by taking into account plant population, crop age, interplant competition, temperature and crop water status. After... -
The effect of plant density on the injuriousness of Busseola fusca (Fuller) (Lepidoptera: Noctuidae) in grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. van den Berg --- , Republic of South Africa J. B.J. van Rensburg --- , Republic of South Africa J.H. Giliomee --- Department of Entomology and Nematology, Republic of South AfricaThe influence of five different plant densities on whorl damage, internal damage, tillering and yield of grain sorghum under attack by Busseola fusca was evaluated over two seasons, using artificial infestation of three egg batches (90 eggs) per 5-m row... -
Utilization of initially-applied labelled ammonium nitrate by three successive crops
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. D.P. Botha --- , Republic of South Africa D.C. Pretorius --- , Republic of South Africa J.C. Johnson --- , Republic of South Africa M.V. Kidson --- , Republic of South AfricaThe aim of the study was to compare N uptake from initially-applied NH4 + and NO3- ions and to compile a balance sheet for applied fertilizer N. In a pot experiment, maize, sorghum and sunflower plants were grown in succession,... -
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... -
Fertilizer placement of maize: I. Grain yield and plant growth
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. du Toit --- , Republic of South Africa J.J. Human --- , Republic of South AfricaNormal fertilizer placement, two deeper than normal, broadcast and no fertilizer treatments were compared in a stubble tillage system in the north-western Free State. Plant growth, as indicated by leaf area, leaf dry mass and stem dry mass, was evaluated... -
Maize response to plant population and soil water supply: I. Yield of grain and total above-ground biomass
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. van Averbeke --- Department of Agronomy, J.N. Marais --- Department of Agronomy,The effect of the level of water deficit on the yield of grain and total above-ground biomass of maize planted at greatly differing densities was investigated in a strictly controlled field experiment, repeated for four seasons. Differences in water supply... -
Towards costing chemical control of Lantana camara L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Erasmus --- Cedara Weeds Laboratory, Plant Protection Research Institute, Department of Agricultural Development, Republic of South Africa J. N.G. Clayton --- , Republic of South AfricaSix herbicide treatments are registered in South Africa for the control of Lantana camara L. (lantana). Three of the treatments were selected for a costing analysis of the initial control of lantana, based on their suitability for specific situations in... -
Effect of planting time on yield and fruit size of open-planted strawberries in the Transvaal
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P. Human --- , Republic of South AfricaThe effect of three planting times (fortnightly intervals) on strawberry cultivars Selekta, Tioga, Parfaite and Rolinda was studied for two seasons. There was no cultivar × planting time interaction, and the yield of all cultivars was significantly reduced from earlier... -
Status of resistance to Chilo partellus (Lepidoptera: Pyralidae) in South African grain sorghum hybrids
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. van den Berg --- Summer Grain Centre, Republic of South Africa J. B.J. van Rensburg --- Summer Grain Centre, Republic of South Africa M.C. van der Westhuizen --- Department of Zoology and Entomology, Republic of South AfricaThe level of resistance to Chilo partellus was evaluated in 49 commercially available grain sorghum hybrids using artificial infestation in each of two field trials. The assessment of leaf feeding damage on a scale of one to nine indicated levels... -
Maize response to plant population and soil water supply II. Plant barrenness and harvest index
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. van Averbeke --- Department of Agronomy, Ciskei J.N. Marais --- Department of Agronomy, CiskeiThe effects of level of water deficit and plant population density on plant barrenness and harvest index were investigated in a strictly controlled field experiment, repeated for four seasons. Differences in soil water supply were obtained by the seasonal variation... -
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... -
The optimal rooting medium for minisetts of potato (Solanum tuberosum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.A. Addae-Kagyah --- Department of Plant Production, Republic of South AfricaThree different rooting media, namely, river sand, sawdust and wood shavings, were used for rooting various sizes of minisetts of potato (Solanum tuberosum L.), uniformly pre-treated with wood ash, indolebutyric acid (IBA), Captan and Lindane. The best substrate was found... -
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... -
Effect of cultivation on the nitrogen fertility of selected dryland soils in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. du Toit --- , Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaThis study is part of an investigation into the effect of cultivation on the organic matter content of topsoils (0 - 200 mm) from commercial farms practising dryland agriculture in the summer rainfall area of South Africa (24°-30°S; 24°-30°E). The... -
New sources of resistance to the stalk borers Busseola fusca (Fuller) and Chilo partellus Swinhoe in maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- Summer Grain Centre, Republic of South Africa J. van den Berg --- Summer Grain Centre, Republic of South AfricaA number of maize genotypes reportedly resistant to various stem borer species were evaluated for resistance to the maize stalk borer, Busseola fusca, and the spotted stem borer, Chilo partellus. Based on larval mass gain after two weeks of feeding... -
Suppression of seed germination and early seedling growth by plantation harvest residues
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.W. Schumann --- , Republic of South Africa K.M. Little --- , Republic of South Africa N.S. Eccles --- , Republic of South AfricaThe role of forestry plantation residues (leaf and branch) in the suppression of establishment of four weed species (Conyza sumatrensis, Trifolium spp., Echinochloa utilis and Lactica sativa) was investigated. Of the three residue types used, Pinus patula residues were found... -
Plant resistance × environment interaction: Perspectives on yield losses caused by the maize stalk borer, Busseola fusca (Fuller)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- , Republic of South AfricaExperimental maize hybrids with various levels of resistance to the maize stalk borer, Busseola fusca (Fuller), were evaluated at different infestation levels during seasons of favourable and unfavourable rainfall. Limited plant resistance sufficed to reduce plant damage and yield losses... -
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... -
Fosfor in geselekteerde onversteurde en bewerkte Suid-Afrikaanse gronde 2. Anorganiese en organiese fosforfraksies
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 Pree --- Departement Grondkunde, Republiek van Suid-AfrikaDaar is voorheen vasgestel dat gewasverbouing die anorganiese (Pa) en organiese (Po) fosforinhoud van gronde vanaf die somerreënvalgebied (25°-30° S; 24°-30° O) in Suid-Afrika beïnvloed het. Dus kan die Pa- en Po-fraksies, wat in planttoeganklikheid varieer, ook moontlik beïnvloed word... -
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... -
Effects of aqueous extracts from Artemisia afra parts and soil on seed germination and early seedling development in selected plant species
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.A. Hansen-Quartey --- Department of Agronomy, Republic of South Africa K. Nyamapfene --- , Republic of South Africa S.A. Materechera --- School of Agriculture, Republic of South AfricaAqueous extracts from leaves, stems, roots of the aromatic shrub Artemisia afra and soil on which Artemisia was grown, were used to investigate their inhibitory effects on germination and seedling development of maize (Zea mays), bean (Phaseolus vulgaris) and ryegrass... -
Measurement of radiant interception of crop canopies with the LAI-2000 plant canopy analyzer
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.Z. Jovanovic --- Department of Plant Production and Soil Science, Republic of South Africa J.G. Annandale --- Department of Plant Production and Soil Science, Republic of South AfricaThe performance of the plant canopy analyzer (PCA), model LAI-2000 (LI-COR, Lincoln, NE, USA), has been tested in two separate field trials for 18 annual crop and pasture species. The objective was to recommend appropriate techniques for reliable estimates of... -
Evaluation of plant resistance to the maize stalk borer, Busseola fusca (Fuller) in maize germplasm improved for resistance to other borer species
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J van Rensburg --- , Republic of South AfricaNineteen maize genotypes resistant to various stalk borer species were evaluated for resistance to the maize stalk borer, Busseola fusca (Fuller), using artificially infested plants grown in a greenhouse. The inbred line GT-FAWCC (C5) resistant to the fall armyworm Spodoptera... -
An investigation into the problems associated with revegetating chrysotile tailings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. van Rensburg --- , Republic of South Africa L. Pistoruis --- , Republic of South AfricaThe present investigation was initiated because of the limited success achieved in the past at attempts to revegetate chrysotile tailings with their associated inherent environmental risk factors. The current set of experiments and surveys, as with several previous studies, were... -
Development of integrated control strategies for wattle. 1. Utilization of wattle, control of stumps and rehabilitation with pastures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Campbell --- Cedara Weeds Laboratory, Republic of South Africa R.L. Kluge --- Cedara Weeds Laboratory, Republic of South AfricaTwo integrated control strategies were developed for areas where wattle infestations could be utilized. Costing analyses were determined for initial control and four follow-up control operations using chemical control and fire. Efficacy of all treatments was high. Costs were significantly... -
Development of integrated control strategies for wattle. II. Control of unwanted wattle
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Campbell --- Cedara Weeds Laboratory, Republic of South Africa D.C. Naudé --- Cedara Weeds Laboratory, Republic of South Africa R.L. Kluge --- Cedara Weeds Laboratory, Republic of South AfricaFour integrated control strategies were developed for wattle that could not be removed for utilization. In the first two strategies, a combination of mechanical and/or chemical control methods either reduced the wood biomass in situ (fell, stack and burn) or... -
Effects of plant population density and cultivar on growth, yield and yield components in groundnut (Arachis hypogaea 1.)
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. Blarney --- Department of Agriculture, AustraliaAn experiment was conducted at the University of Queensland Redland bay Farm (27°37′ S, 153°17′ E) in southeast Queensland, Australia to study response of groundnut cultivars [Improved Virginia Bunch, NC-7, Q18801 (Virginia types), TMV-2, McCubbin and Red Spanish (Spanish types)]... -
Effect of planting date of maize on damage and yield loss caused by the stalk borer, Busseola fusca (Fuller) (Lepidoptera: Noctuidae) in Lesotho
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Ebenebe --- Department of Zoology and Entomology, Faculty of Natural Sciences, Republic of South Africa J. van den Berg --- , Republic of South Africa T.C. van der Linde --- Department of Zoology and Entomology, Faculty of Natural Sciences, Republic of South AfricaThe effect of the time of planting of maize on the incidence of infestation and yield loss caused by Busseola fusca (Fuller) was studied using five successive plantings (early November to early January) during the 1995/96 and 1996/97 growing seasons... -
Effect of number of plants per plant hole and of runner plant crown diameter on strawberry yield and fruit mass
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P. Human --- , Republic of South AfricaRunner plants of three strawberry cultivars, ‘Selekta’, ‘Tiobelle’ and ‘Tioga’, each with three crown diameter classes, were planted using one, two or three runner plants per planting hole. This was done in order to determine whether yield reductions stemming from... -
The effect of plant population on the quality of sunflower seed for processing
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 AfricaAmong other disadvantages, low hullability of sunflower seed results in oil cake with a high fibre and low protein content. Hullability is known to increase with increased seed size. Seed size generally decreases with an increase in plant density. The... -
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... -
Influence of intraspecific competition on seed production of Datura stramonium L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. E.J. SAAYMAN --- , Republic of South AfricaField experiments were conducted during two growing seasons to investigate the effect of different Common thorn-apple (Datura stramonium L.) densities on seed production of this specie. Maize (Zea mays L.) was planted in 2.1 m rows with a plant population... -
Agronomic evaluation of streak resistant maize germ plasm derived from the improved Vaalharts maize composite
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- , Republic of South AfricaStreak resistant maize inbred lines released by the Grain Crops Institute in 1995 were evaluated in the absence of streak disease as hybrid combinations in field trials. The evaluation of single crosses between three lines in each of a B73... -
Effect of plant density, weed-crop interference and water stress on seed germination of Datura stramonium L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. E.J. Saayman-duToit --- , Republic of South AfricaField experiments were conducted during two growing seasons to determine the effect of different common thorn-apple (Datura stramonium L.) densities on seed germination. The study provided information on the implications of weed and weed seed infestation, where no weed control... -
The use of Simple Sequence Repeats (SSRs) to identify commercially important potato (Solanum tuberosum L.) cultivars in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.E. McGregor --- , Republic of South Africa M.M. Greyling --- , Republic of South Africa L. Warnich --- Department of Genetics, Republic of South AfricaThe morphological traits that are traditionally used to identify potato cultivars are not always reliable, especially when dealing with in vitro plants. Various molecular marker techniques have been described for cultivar identification, but the Simple Sequence Repeat (SSR) technique has... -
Rate and timing of nitrogen fertilizer applications on wheat grown under dryland and supplementary irrigation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.A. Adjetey --- , Australia P. G.E. Searle --- , Australia L.C. Campbell --- , AustraliaField experiments were carried out at the University of Sydney Farm, to examine nitrogen fertilizer application strategies for increasing N uptake and productivity of wheat (Triticum aestivum L.) grown on a red-brown earth (Natrixeralf) in Australia, under dryland and supplementary... -
Effect of temperature on the growth of Lachenalia cv. Ronina during the bulb preparation phase
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E.S. du Toit --- Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, Republic of South Africa P.J. Robbertse --- Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, Republic of South Africa J.G. Niederwieser --- , Republic of South AfricaLachenalia cultivars have excellent characteristics as flowering pot plants. The effect of three temperature regimes on the growth of small bulbs of Lachenalia cv. Ronina to flowering size (± 7 g) was studied. Potted bulbs were grown in three temperature... -
Clay-substrate application to sandy open-cast mine soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G. Reuter --- Department of Soil Science and Plant Nutrition, GermanyThe review gives some insight into the objective of amelioration to improve fertility of sandy soils. The research concept is based on the high water and cation exchange capacity of clay minerals. Technological and economic problems as well as practicable... -
Development of a sequence characterized amplified region (SCAR) marker for the identification of the potato cultivars Astrid and Mnandi
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.S. Jansen van Rensburg --- , South Africa I.A. Dubery --- Department of Biochemistry, South AfricaAstrid and Mnandi are two closely related potato cultivars of commercial importance in Southern Africa. Random amplified polymorphic DNA (RAPD) markers were screened and a sequence characterized amplified region (SCAR) marker was developed to distinguish between these two cultivars since... -
Phosphorous sorption study of selected South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.C. Henry --- , MarieF. Smith --- ,Phosphorous isotherms for 21 selected soils from the Republic of South Africa were constructed and the Langmuir, Freundlich and Temkin sorption models were compared using regression analysis. Over a range of solution concentrations of 0.025 - 2.00 mg P I−1,... -
Maize cropping system analysis and economic comparison for two environments
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.A. Prinsloo --- , Republic of South Africa H. J.H. Erasmus --- , Republic of South AfricaThe effect of different maize cropping systems and economic implications were investigated at two localities from 1994 to 2000. Soil types differed, and the topsoil at Bloekomspruit and Viljoenskroon contained 17% and 5% clay, respectively. The five primary cropping systems... -
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... -
Breeding for resistance to ear rot of maize, caused by Stenocarpella maydis (Berk) Sutton. 1. Evaluation of selection criteria
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.D. Rossouw --- , South Africa J. B.J. van Rensburg --- , South Africa C.S. van Deventer --- Department of Plant Breeding, South AfricaThe objective of this study was to provide a better understanding of the interrelationship between methods of screening for resistance to ear rot, caused by Stenocarpella maydis. The inheritance of resistance as well as genetic and phenotypic correlation of various... -
Breeding for resistance to ear rot of maize, caused by Stenocarpella maydis (Berk) Sutton. 2. Inheritance of resistance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.D. Rossouw --- , South Africa J. B.J. van Rensburg --- , South Africa C.S. van Deventer --- , South AfricaThe inheritance of resistance to ear rot, caused by Stenocarpella maydis, was investigated using a complete diallel cross of 10 inbred lines, ranging from resistant to susceptible. Parents, F1 crosses and reciprocals were evaluated at each of three localities, representative... -
Effect of planting density on dry matter partitioning in young ‘Laetitia’ / ‘Marianna’ plum trees grown in lysimeter tanks
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South Africa C. Schutte --- , Republic of South AfricaThe effects of increasing planting density on young lysimeter tank-grown plum trees were investigated. Seasonal increases in stem circumference, and average shoot lengths, decreased significantly (P = 0.05) as the number of trees per 1.4 × 3.0 m tank increased... -
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... -
Effect of planting and harvesting dates on fungus-growing termite infestations in maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. van den Berg --- , South Africa H.F. Riekert --- , South AfricaFungus-growing termites (Microtermes spp. and Allodontermes spp.) damage maize roots and cause lodging. The pattern of attack, incidence of lodging, and the effect of planting and harvesting dates on damage and yield were studied in field trials over five seasons... -
New generation maize inbred lines resistant to diplodia ear rot, caused by Stenocarpella maydis (Berk) Sutton
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J van Rensburg --- , South Africa J.D. Rossouw --- , South Africa C.S. van Deventer --- Department of Plant Sciences, South AfricaIn an attempt to obtain superior levels of resistance to Stenocarpella maydis ear rot, three elite maize inbred lines (DO620Y, E739 and B37) from different genetic backgrounds that had previously been shown to have useful levels of resistance were crossed... -
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... -
Survival of Ralstonia solanacearum biovar 2 in soil under different cropping systems
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E. I.M. Stander --- Department of Plant Production and Soil Science, South Africa P.S. Hammes --- Department of Plant Production and Soil Science, South Africa E.A. Beyers --- Department of Plant Production and Soil Science, South AfricaSurvival of Ralstonia solanacearum biovar 2 (race 3) was monitored in an artificially infested field over a five year period. Four cultural practices (maize monoculture, potato monoculture, bare fallow and weed-fallow) were applied. Ralstonia populations in the soil were quantified... -
Recurrent selection for resistance in maize to the African stalk borer, Busseola fusca (Fuller)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- , South Africa J. Klopper --- , South AfricaStem borer resistant inbred lines Mp704 and Mp706 of Mississippi origin were used as donor parents in a recurrent selection programme, to develop locally adapted germplasm with improved resistance to the stalk borer Busseola fusca. The segregating progenies of crosses... -
Suppression of silver-leaf bitter apple (Solanum elaeagnifolium Cav.) by cultivated pasture crops under dry-land conditions: a preliminary study
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B.D. Viljoen --- Weed Laboratory, Republic of South Africa V.D. Wassermann --- , Republic of South AfricaSuppression of the weed silver-leaf bitter apple (Solarium elaeagnifolium Cav.) by three pasture species, under dry-land conditions, was studied in a field trial over four seasons in the Free State Province. The pasture crops used were oats (Avena sativa), smuts... -
SOIL carbon and nitrogen in five contrasting biomes of South Africa exposed to different land uses
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 AfricaStocks of soil C to a depth of 50 cm in untransformed, indigenous veld ranged from 21 t ha-1 in karoo to 168 t ha-1 in thicket and stocks of N ranged from 3.41 ha-1 in karoo to 12.8 t... -
Modelling the contribution of root accessible water tables towards crop water requirements
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.Z. Jovanovic --- Department of Earth Sciences, Republic of South Africa L. Ehlers --- Department of Soil, Republic of South Africa A. T.P. Bennie --- Department of Soil, Republic of South Africa C.C. Du Preez --- Department of Soil, Republic of South Africa J.G. Annandale --- Department Plant Production and Soil Science, Republic of South AfricaProper utilization of shallow water tables could substantially reduce irrigation water requirements in large agricultural areas. The objective was to develop and test a computer model for predicting the contribution of shallow water tables to root water uptake. The model... -
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... -
Effect of commercially available rhizobacteria strains on growth and production of lettuce, tomato and pepper
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.S. Yobo --- Discipline of Plant Pathology, Republic of South Africa M.D. Laing --- Discipline of Plant Pathology, Republic of South Africa C.H. Hunter --- Discipline of Microbiology, Republic of South AfricaSeven microbial products of the genus Bacillus were evaluated under greenhouse and shadehouse conditions for efficacy on lettuce, tomato and pepper as plant growth promoters. Treatments were applied as a drench (106 cfu ml1) directly onto seedlings in composted pine... -
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... -
Ecosystem carbon storage under different land uses in three semi-arid shrublands and a mesic grassland in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.J. Mills --- Department of Soil Science, South Africa T.G. O'Connor --- Centre for African Ecology, South Africa J.S. Donaldson --- , South Africa M.V. Fey --- Department of Soil Science, South Africa A.L. Skowno --- , South Africa A.M. Sigwela --- Terrestrial Ecology Research Unit, Departments of Botany & Zoology, South Africa R.G. Lechmere-Oertel --- Terrestrial Ecology Research Unit, Departments of Botany & Zoology, South Africa J.D. Bosenberg --- , South AfricaCarbon (C) storage in biomass and soils is a function of climate, vegetation type, soil type and land management. Carbon storage was examined in intact indigenous vegetation and under different land uses in thicket (250–400 mm mean annual precipitation), xeric... -
Pine litter as substrate for propagation of vegetable transplants in trays
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.S. Mphaphuli --- Centre of Organic and Smallholder Agriculture, Department of Crop Sciences, South Africa W. van Averbeke --- Centre of Organic and Smallholder Agriculture, Department of Crop Sciences, South Africa R. Böhringer --- Centre of Organic and Smallholder Agriculture, Department of Crop Sciences, South AfricaThe study evaluates the potential of pine litter for use as a substrate in the propagation of vegetable transplants in trays. Sub-optimum pH and electrical conductivity of pine litter were addressed by incorporating 10% feedlot manure by volume. The water... -
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... -
Comparative genetic analysis of highland maize inbred lines using AFLP and SSR markers
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B.W. Legesse --- , Ethiopia A.A. Myburg --- Department of Genetics & Forestry and Agricultural Biotechnology Institute (FABI), South Africa K.V. Pixley --- , A.M. Botha --- Department of Genetics & Forestry and Agricultural Biotechnology Institute (FABI), South AfricaThe objectives of the study were (1) to compare the informativeness of SSR and AFLP markers in genetic diversity analysis of highland maize inbred lines, and (2) to compare their effectiveness in classifying the inbred lines into heterotic groups. Thirty-two... -
Trace element concentrations in soils under different land uses in Mpumalanga Province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.E. Steyn --- , Republic of South Africa J.E. Herselman --- , Republic of South AfricaTrace element deficiencies and toxicities have become important aspects of land quality and are affected by the increased pressure on land from industrialisation and agricultural practices. The objective of the study was to determine if differences occur in trace element... -
Morphology and ultrastructure of glandular and nonglandular trichomes on the leaves of Athrixia phylicoides (Asteraceae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Möller --- Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, E.S. du Toit --- Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, P. Soundy --- Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, J. Olivier --- Department of Environmental Sciences,Athrixia phylicoides is one of many plants from the Asteraceae family used as a traditional herbal medicine. Pharmacological evaluation of leaf extracts confirmed that the plant has anti-inflammatory, antihypertensive, narcotic and analgesic properties. The medicinal properties of plants are often... -
Etiolation aids rooting of Protea cynaroides cuttings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.C. Wu --- Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, South Africa E.S. du Toit --- Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, South Africa C.F. Reinhardt --- Department of Plant Production and Soil Science, Faculty of Natural and Agricultural Sciences, South AfricaThe role that starch content and blanching play in the rooting of Protea cynaroides cuttings was studied. P. cynaroides stems were blanched on the motherplant in the field, which resulted in a higher starch concentration in the cuttings. The relationship... -
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... -
Effect of liming and mineral nutrition on growth of honeybush (Cyclopia spp.) plants
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. Joubert --- , South Africa W. A.G. Kotzé --- , South Africa J. Wooldridge --- , South AfricaA short-duration pot trial was carried out to determine the effects of liming and of mineral nutrients on Cyclopia spp., a newly commercially significant member of the fynbos flora, which habitually grows in acid, low phosphorus (P) sandy soils. Total... -
Honeybush (Cyclopia spp.) response to phosphorus fertilisation and mulching
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. Joubert --- , South Africa P.S. Botma --- , South Africa W. A.G. Kotzé --- , South Africa J. Wooldridge --- , South AfricaHoneybush (Cyclopia spp.) is endemic to the Western- and Eastern Cape where it grows naturally in sandy, acidic, low- phosphorus (P) soils. The effects of different rates of applied P, and of mulches, on the growth of four honeybush species... -
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... -
Effect of watering and seedling density on field establishment and performance of pearl millet and sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S. Mapfumo --- Department of Crop Science, Zimbabwe C. Chiduza --- Department of Agronomy, Faculty of Science and Agriculture, South Africa E.M. Young --- , UK F.S. Murungu --- Department of Agronomy, Faculty of Science and Agriculture, South Africa P. Nyamudeza --- , ZimbabweThe practice of transplanting seedlings from nurseries was used as a strategy to improve stand establishment in pearl millet and sorghum in a semi arid area of Zimbabwe. A nursery experiment evaluated three watering regimes namely, watering after depletion to... -
Effect of cultivar, seedling age and leaf clipping on establishment, growth and yield of pearl millet (Pennisetum glaucum) and sorghum (Sorghum bicolor) transplants
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S. Mapfumo --- Department of Crop Science, Zimbabwe C. Chiduza --- Department of Agronomy, Faculty of Science and Agriculture, South Africa E.M. Young --- , UK F.S. Murungu --- Department of Agronomy, Faculty of Science and Agriculture, South Africa P. Nyamudeza --- , ZimbabweThis study explored the viability of intensifying pearl millet and sorghum production through use of nurseries and transplanting to address the problem of poor stand establishment. The experiments were carried out over two seasons, the 1999/2000 and 2000/2001 seasons in... -
Effect of indigenous storage method on performance of taro [Colocasia esculenta (L.) Schott] under field conditions in a warm subtropical area
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AlbertT. Modi --- ,Successful crop stand establishment, a critical prerequisite for efficient crop production, is primarily determined by propagule quality. Taro [Colocasia esculenta (L.) Schott] corms of different sizes (80–100 g corm−1, 40–60 g corm−1 and 20–30 g corm−1) that had been stored... -
Soil organic matter and microbial biomass as influenced by sugar cane (Saccharum hybrid sp.) production practices 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 --- , Mauritius C. C. Du Preez --- Department of Soil, Crop and Climate Sciences, South AfricaSugar cane has been grown in Mauritius for over 350 years in a monocropping system. As a result, soil quality could have declined since productivity has been stagnating over the last twenty years in spite of improved agronomic practices and... -
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... -
Root dynamics of Themeda triandra Forsk. in relation to water stress and defoliation at different phenological stages
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: I.B. Oosthuizen --- Department of Animal, Wildlife and Grassland Sciences, South Africa H.A. Snyman --- Department of Animal, Wildlife and Grassland Sciences, South AfricaThe impact of water stress on root growth for the indigenous apomectic C4-grass species Themeda triandra was determined over a growing season covering three growth stages (vegetative, pipe and reproductive), as well as for regrowth occurring to one, three and... -
The effects of a water treatment residue on grain yield and nutrient content in seeds of common dry beans (Phaseolus vulgaris L. cv. Ghadra) grown in a dystrophic soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.W. Titshall --- , South Africa J.C. Hughes --- , South AfricaThis glasshouse study investigated the grain yield and nutrient content of seed of common dry beans (Phaseolus vulgaris L. cv. Ghadra) grown in a dystrophic sandy soil treated with 0, 50, 100, 200 and 400 g kg−1 water treatment residue... -
Soil water variability in the Weatherley grassland catchment, South Africa: I. Evapotranspiration
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: CW van Huyssteen --- Department of Soil, Crop and Climate Sciences, South Africa TB Zere --- Department of Soil, Crop and Climate Sciences, South Africa M Hensley --- Department of Soil, Crop and Climate Sciences, South AfricaEvapotranspiration (ET) is a major component of the soil water balance and therefore requires accurate determination to quantify catchment water yield. Six-year daily ET was determined at 300 mm depth intervals in the root zone of 28 soil profiles in... -
Effect of plant spacing on growth and yield of lettuce (Lactuca sativa L.) in a soilless production system
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Maboko --- , C.P. Du Plooy --- ,Lettuce production in re-circulating hydroponic systems is done on a limited scale in South Africa with conflicting information on the recommended spacing for optimal yield and quality in such systems. The development and yield of four lettuce (Lactuca sativa L.)... -
Advances in pedology in South Africa
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, M. Hensley --- Department of Soil, Crop and Climate Sciences, C.W. van Huyssteen --- Department of Soil, Crop and Climate Sciences,The ability of soil to serve as a unique buffer of water, organic carbon, nutrients, pH, redox and temperature is recognised in environmental research. A detailed study on hardpan carbonate and dorbank horizons in the commonly occurring ‘heuweltjies’ of 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... -
Modelling crop growth and crop water relations in South Africa: Past achievements and lessons for the future
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Singels --- , South Africa J.G. Annandale --- Department of Plant Production and Soil Science, South Africa J.M. De Jager --- Department of Soil, Crop and Climate Sciences, South Africa R.E. Schulze --- , South Africa N.G. Inman-Bamber --- , Australia W. Durand --- , South Africa L.D. Van Rensburg --- Department of Soil, Crop and Climate Sciences, South Africa P.S. Van Heerden --- , South Africa C.T. Crosby --- , South Africa G.C. Green --- , South Africa J.M. Steyn --- Department of Plant Production and Soil Science, South AfricaMathematical simulation of crop growth and water relations has become indispensable to agricultural science and practice. A critical assessment of how modelling has contributed to the development of crop science and to the management of crop production and natural resources... -
Early establishment performance of local and hybrid maize under two water stress regimes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. Mabhaudhi --- , Pietermaritzburg A.T. Modi --- , PietermaritzburgMaize (Zea mays L.) is the major grain crop in South Africa where most subsistence farmers still plant landraces. The objective of this study was to compare two landrace selections of maize with two hybrids popular among small-scale farmers in... -
A preliminary study to determine water stress tolerance in wild melon (Citrullus Lanatus L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.S. Zulu --- , A.T. Modi --- ,Common wild melon (Citrullus Lanatus L.) is an indigenous crop that can contribute to the alleviation of food insecurity as it is an easy-to-grow food source with the potential for processing. The objective of this study was to test the... -
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... -
Hydrological classification of orthic A horizons in Weatherley, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: CW van Huyssteen --- Department of Soil-, Crop- and Climate Science, South AfricaOrthic A horizons carry little interpretive, especially hydrological, value. This paper aims to elucidate the hydrological interpretation of orthic A horizons. Measured water contents in the orthic A horizons of 28 profiles in the Weatherley catchment of South Africa were... -
Maize–planting date interaction and effect of Bt maize on European corn borer (Ostrinia nubilalis (Hubner) (Coleoptera: Crambidae) damage
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M Obopile --- Department of Entomology, Ohio Agricultural Research and Development Center, USA RB Hammond --- Department of Entomology, Ohio Agricultural Research and Development Center, USA PR Thomison --- Department of Horticulture and Crop Science, USAA study was conducted to determine the influence of planting date and transgenic maize on maize yield following stalk injury by European corn borer, Ostrinia nubilalis (Hubner). Transgenic and non-transgenic maize hybrids with short- and full-season maturity were planted in... -
Winter cover crops effects on soil strength, infiltration and water retention in a sandy loam Oakleaf soil in Eastern Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: HA Mupambwa --- Department of Agronomy, South Africa IIC Wakindiki --- Department of Agronomy, South AfricaThere is substantial evidence that cover crops increase soil fertility and plant nutrition but the few studies concerning soil physical properties are conflicting. This study determined the effects of monocultures of vetch (Vicia dasycarpa L.), lupin (Lupinus angustifolius L.), oats... -
Carbon stocks in fynbos, pastures and vineyards on the Agulhas Plain, South Africa: a preliminary assessment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AJ Mills --- Department of Soil Science, South Africa SC Birch --- , South Africa JD Stephenson --- , South Africa RV Bailey --- , South AfricaLarge tracts of fynbos on the Agulhas Plain are being converted to agriculture. Carbon (C) stocks in fynbos, pastures and vineyards were measured in this preliminary study to determine whether conservation of fynbos results in greater C storage relative to... -
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... -
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... -
Effect of shallow tillage and straw mulching on soil water conservation and grapevine response
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Philip A Myburgh --- ARC–Infruitec/Nietvoorbij, South AfricaEffects of shallow tillage and straw mulch thickness on water conservation and grapevine responses were compared to bare, untilled soil in a Sauvignon blanc/99R vineyard near Stellenbosch from 1995 to 1997. Shallow tillage to a depth of 6 cm did... -
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 review of orange roughy Hoplostethus atlanticus fisheries, estimation methods, biology and stock structure
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: T. A. BranchOrange roughy Hoplostethus atlanticus are unusual fish. They form dense aggregations that have fuelled lucrative fisheries at great depths (600–1 400 m), especially off Namibia, New Zealand and Australia. They are thought to be very long-lived (>100 years, maturity at... -
Entanglement of pinnipeds at Marion Island
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: G. J. G. Hofmeyr M. N. BesterDuring the period April 1991–March 1996, 10 entangled Antarctic fur seals Arctocephalus gazella, 28 entangled Subantarctic fur seals A. tropicalis and one entangled southern elephant seal Mirounga leonina were observed at Marion Island, Southern Ocean. Entanglement of fur seals was... -
Population genetic studies of horse mackerel Trachurus trecae and Trachurus trachurus capensis off Angola
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: M. I. Sardinha G. NævdalGenetic variability of the Kunene horse mackerel Trachurus trecae and the Cape horse mackerel Trachurus trachurus capensis was examined using starch gel electrophoresis of enzymatic proteins on individuals collected along the Angolan coast. Six polymorphic enzyme loci were found in... -
Adaptability of great cormorants Phalacrocorax carbo in a coastal environment demonstrated by their exploitation of introduced prey species and use of artificial breeding sites
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: R. M. Randall C. Tregoning B. M. Randall A. P. MartinAn analysis of the contents of regurgitations of great cormorant Phalacrocorax carbo chicks at two coastal colonies in South Africa, one on an offhore island (St Croix) and the other at a saltworks in an estuary (Swartkops), revealed that the... -
Changes to regulations and the gear used in the South African commercial fishery for Jasus lalandii
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: D. S. Schoeman A. C. Cockcroft D. L. Van Zyl P. C. GoosenAlterations to the operational fishing gear used in the South African west coast rock lobster Jasus lalandii fishery and their resultant impacts are investigated. The most important developments have been: (i) a change during the 1960s from hand-hauled hoopnets to... -
Genetic and morphological variation of the lanternfish Lampanyctodes hectoris (Myctophiformes: Myctophidae) off southern Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: W. K. Florence P. A. Hulley B. A. Stewart M. J. GibbonsGenetic and morphological variation within the southern African population of Lampanyctodes hectoris was analysed. A total of 15 enzymes, encoding 22 isozyme loci, was examined (n = 327); seven were polymorphic. The percentage of polymorphic loci ranged from 13.6 to... -
Trap selectivity and the effects of altering gear design in the South African rock lobster Jasus lalandii commercial fishery
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: D. S. Schoeman A. C. Cockcroft D. L. Van Zyl P. C. GoosenThe current trap fishery for the West Coast rock lobster Jasus lalandii in South African waters results in the capture, sorting and release of large numbers of undersized animals. Once removed from the water, they are vulnerable to damage from... -
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... -
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 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 METHOD FOR THE QUANTITATIVE AND QUALITATIVE DETERMINATION OF PLANKTONIC DIATOMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: F.R. Schoeman --- , South AfricaA method for the quantitative and qualitative determination of planktonic diatoms was developed. The method uses the Utermöhl counting technique (in which an inverted microscope is employed) as a basis but also involves the calculation of the relative density of... -
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,... -
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... -
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... -
ZOOPLANKTON DISTRIBUTION IN RELATION TO ENVIRONMENTAL CONDITIONS IN THE SWARTVLEI SYSTEM, SOUTHERN CAPE
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 AfricaSwartvlei is an ectogenic meromictic coastal lake connected to the sea via an estuary which closes periodically due to the formation of a sand bar across its mouth. The inflow of high-salinity water water from the sea into the lake... -
POPULATION DYNAMICS AND DEMOGRAPHY OF AN ESTUARINE COPEPOD (PSEUDODIAPTOMUS EESSEI) IN LAKE SIBAYA, A SUBTROPICAL FRESHWATER COASTAL LAKE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: RC Hart --- , South AfricaPopulation size and stage structure of Pseudodiaptomus hessei (Mrázek) was studied over 27 months at a single site in subtropical Lake Sibaya. Population density varied seasonally from about 1 to 4 individuals per litre, but a fairly stable population structure... -
UTILIZATION OF PLANT MATERIALS BY JUVENILE AFRICAN CATFISH (CLARIAS GARIEPINUS) AND ITS IMPORTANCE IN FISH CULTURE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Douglas Clay --- Department of Agriculture, ZimbabweJuvenile African catfish Clarias gariepinus between 100 and 200 mm total length from Lake McIlwaine, Zimbabwe are able to digest plant proteins. The digestibility of three major plant proteins (maize, sunflower seed and soya meal) was 30,0, 65,4 and 84,3%... -
DISSOLVED OXYGEN DEPLETION AND NUTRIENT UPTAKE IN AN IMPOUNDMENT INFESTED WITH EICHHORNIA CRASSIPES (MART.) SOLMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: S.N. Shillinglaw --- Department of Water Affairs, South AfricaBon Accord Dam, near Pretoria, had 95% of its surface area covered by water hyacinth (Eichhornia crassipes (Mart) Solms). The mean surface dissolved oxygen concentration was 1,9 mg O2 2−1 which is below the minimum concentration required by most angling... -
THE FOOD OF BARBUS MATTOZI GUIMARAES. 1884, (PISCES: CYPRINIDAE) IN A ZIMBABWE IMPOUNDMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.G. Donnelly --- , ZimbabweThe food from the gut contents of 853 Barbus mattozi of various sizes were examined and analysed. The results showed a dietary transition from planktonivorous and omnivorous to piscivorous with increasing size of fish. At sizes larger than 230 nm... -
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... -
THE ZOOBENTHOS OF THE TOUW RIVER FLOODPLAIN
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.R. DAVIES --- Institute for Freshwater Studies, Republic of South AfricaAn eighteen month study (January 1979 - June 1980) of the sediment, emergent and submerged plant-associated benthic macro-invertebrates of the western sector of the Touw River Flood-plain is reported for four study sites: Wilderness Lagoon, the Touw River and East... -
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... -
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... -
A SYSTEM DYNAMICS MODEL OF PART OF THE PONGOLO RIVER FLOODPLAIN: DEVELOPMENT AND WATER MANAGEMENT POLICY ANALYSIS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: A.K. Drewes --- ,The issue of allowing the Liming, duration and magnitude of a flood release to be determined by man has led to a wide spectrum of viewpoints as to which values of these parameters are most suitable for the Pongolo River... -
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... -
THE JOURNAL OF THE LIMNOLOGICAL SOCIETY OF SOUTHERN AFRICA: APPRAISAL, ANALYSIS, APPROACH AND APPLICATION
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.A. Thornton --- City Planner's Department, South AfricaIn accordance with the Silver Jubilee theme of ‘reminisce and assess’, the editorial takes a critical look at the Journal of the Limnological Society of Southern Africa with the objective of examining its raison d'etre. After briefly examining the need... -
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... -
A QUARTER CENTURY OF GREAT LAKES RESEARCH IN AFRICA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: DavidH. Eccles --- , United KingdomThe African Great Lakes differ from shallower large African lakes by undergoing seasonal stratification and from large reservoirs in having long residence times, so that the ionic concentration of the lake water differs substantially from that of the inflows. -
DISTRIBUTION AND DIVERSITY OF MKUZE SWAMP FISHES DURING A SUMMER FLOOD
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: PH Skelton --- , South Africa AK Whitfield --- , South Africa N P E James --- , South AfricaVery little information is available on the fishes of the Mkuze swamps and this paper presents the results of an ichthyofaunal survey conducted in March 1988. The study, which coincided with a major river flood, determined that the fish fauna... -
ENVIRONMENTAL CORRELATES OF PLANT SPECIES DISTRIBUTION ON THE NYL RIVER FLOODPLAIN
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: M. A.S. Coetzee --- Botany Department, South Africa K.H. Rogers --- Botany Department, South AfricaThe envisaged construction of a dam on a major tributary of the Nyl River will alter the hydrological regime with consequent effects on the structure and functioning of the downstream floodplain ecosystem (Nylsvley). Attempts to minimise this impact will be... -
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... -
GEOGRAPHICAL TRENDS IN THE WATER CHEMISTRY 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, South Africa J.M. King --- Freshwater Research Unit, Zoology Department, South AfricaAlthough it is becoming increasingly important for the aquatic chemistry of wetlands to be understood, little chemical information is available for the wetlands of South Africa. During a project aimed at beginning to redress this gap in our knowledge, conductivity... -
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... -
AN HOLISTIC APPROACH TO THE MANAGEMENT OF WATER QUALITY IN FALSE BAY, CAPE TOWN, SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: A. J.R. Quick --- Town Planning Branch, Cape Town City Council, South AfricaAn overview of the water quality status of False Bay identified the bacterial/viral water quality of stormwater and rivers discharging near contact recreation beaches to be the management concern of highest priority. A second water quality concern is the potential... -
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... -
FURTHER COMMENT ON THE RESPONSE OF EASTERN CAPE PROVINCE ESTUARIES TO VARIABLE FRESHWATER INFLOWS
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: B.R. Allanson --- , South Africa G. H.L. Read --- , South AfricaRiver flow patterns in the Kariega, Great Fish and Keiskamma estuaries, South Africa are examined to assess the impact variation in flow has upon the delivery of inorganic nutrients, total organic carbon, primary productivity and the heterotrophic components, bacteria and... -
RELATIVELY NEGATIVE δ13C RATIOS OF MESOZOOPLANKTON IN THE SUNDAYS RIVER ESTUARY, COMMENTS ON POTENTIAL CARBON SOURCES
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: H.L. Jerling --- Department of Zoology, South Africa T.H. Wooldridge --- Department of Zoology, South AfricaMesozooplankton, submergent and fringing macrophytes and particles suspended in the water column in the Sundays River estuary South Africa were analyzed for δ13C isotope ratios. Highly negative values (−28.3‰ to −32.0‰) for the mesozooplankton species suggest the possibility of phytoplankton... -
A NOTE ON THE UNUSUAL CRUSTACEAN COMMUNITY OF A TEMPORARY POOL IN THE NORTHERN CAPE
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: M. Hamer --- , South Africa N.A. Rayner --- Department of Zoology and Entomology, South AfricaA temporary pool in a dry stream bed traversing Grootvloer Pan in the Northern Cape was inhabited by fifteen branchiopod and calanoid copepod crustacean species. There was an unusually high number of congeneric species in the pool; in the class... -
FUNDUDZI, A UNIQUE, SACRED AND UNKNOWN SOUTH AFRICAN LAKE
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: B. C.W. van der Waal --- , ,Lake Fundudzi is a unique, small inland lake in the north eastern region of South Africa, formed by a landslide. The considerable sedimentation of its basin indicates an age in the order of 10 000s of years. It forms the... -
PRELIMINARY OBSERVATIONS ON THE FISH POPULATIONS OF THE RECENTLY-IMPOUNDED KATSE RESERVOIR, LESOTHO
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: D. Tweddle --- , South Africa M. T.T. Davies --- , , South AfricaKatse is a new 35 km long impoundment on the Malibamatso River, a highland tributary of the Orange River in Lesotho. Two fishing surveys in 1996 yielded Barbus aeneus, Labeo capensis, Oncorhynchus mykiss and the occasional Austroglanis sclateri. Length frequency... -
A LIMNOLOGICAL PROFILE OF THE UPPER OKAVANGO DELTA AT LOW WATER LEVEL
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: Rob C. Hart --- ,Selected limnological attributes of the Okavango Delta panhandle were measured during a brief summer survey of “open-water” habitats extending from the permanent mainstream channel, through contiguous off-channel lagoons and still backwaters, to seasonally isolated floodplain lagoon and temporary pool biotopes... -
MANAGEMENT, CONSERVATION AND RESEARCH OF INTERNATIONALLY SHARED WATERCOURSES IN SOUTIIERN AFRICA—NAMIBIAN EXPERIENCE WITH THE OKAVANGO RIVER AND RIVERS OF THE EASTERN CAPRIVI
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: E. D. Taylor --- , England S. Bethune --- , NamibiaAlthough the emphasis of the recent National Rivers Research Initiative (now the Research Programme for the Management of Rivers) in South Africa was on river research in that country, the reality is that in southern Africa many watercourses are shared... -
GENETIC VARIATION IN TWO POPULATIONS OF THE ORANGE ROUGHY (HOPLOSTETHUS ATLANTIC US) FROM NAMIBIA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: N. S. Flint --- , , South Africa F. H. van der Bank --- , , South Africa P. J. Theron --- , , South Africa A. Staby --- , NamibiaThe orange roughy (Hoplostethus atlanticus) is a relatively new commercially exploited fish species, but it is currently ranked third amongst the world's top five seafood products. Gene products of 22 protein coding loci in two populations off the coast of... -
ZOOPLANKTON OF THE MHLATHUZE (RICHARDS BAY) ESTUARY: AN OVERVIEW, WITH COMMENTS ON FRESHWATER REQUIREMENTS
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: H. L. Jerling --- , , South AfricaThe Mhlathuze estuary in its present form was established during construction of the Richards Bay harbour during the early 1970s. This paper summarises available data on the zooplankton community as part of a study on the freshwater requirements of the... -
A NOTE ON THE REINTRODUCTION OF BARBUS TREURENSIS GROENEWALD 1958 (PISCES: CYPRINIDAE) INTO TIIE TREUR RIVER, MPUMALANGA, SOUTH AFRICA.
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: J. S. Engelbrecht --- , South Africa F. Roux --- , South AfricaThe Treur River Barb (Barbus treurensis) was reintroduced into the Treur River after being extinct in this river for about twenty years. During March 1995, 504 individuals were released at a carefully selected site. Recent surveys have shown that, within... -
Mixed livestock grazing in diverse temperate and semi-arid environments
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T. Nolan J. Connolly C. Sall J. CesarThe need for an annual increase of 2% in global food production demands knowledge on how best to use natural grazing land resources. Taken with the requirement to protect resources, this need creates conflicting demands on grazing land management. Concerns... -
Patterns of seed production and shrub association in two palatable Karoo shrub species under contrasting land use intensities
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S.W. ToddSeed production and shrub association patterns of the two palatable shrubs. Tripteris sinuatum and Tetragoma froticosa were investigated on heavily grazed communal and lightly grazed commercial rangeland in the succulent karoo, Namaqualand. Seed production in both these species was substantially... -
Correlates of stocking rate and overgrazing in the Leliefontein Communal Reserve, central Namaqualand
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S.W. Todd M.T. HoffmanWe investigate the correlates of stocking rate in the Leliefontein communal reserve and attempt to provide a mechanistic explanation of the controlling factors. We further speculate on how high stocking rates are maintained in relation to the current state of... -
Effects of fire, bruchid beetles and soil type on germination and seedling establishment of Acacia drepanolobium
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: B.D. Okello T.P. YoungThe effects of fire, bruchid seed beetles and soil type on the germination and seedling establishment of Acacia drepanolobium were experimentally investigated. Seeds subjected to three seed treatments (bruchid damaged, bruchid-free burnt, and bruchid-free unburned) were germinated in three different... -
Grazing behaviour and diet selection of Barotse cattle on a communally grazed floodplain in west Zambia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: RMT Baars JJ OttensGrazing behaviour and diet selection of cattle were studied on a communally grazed floodplain and its adjacent wooded uplands in western Zambia to identify the interaction between basic herd management practices, foraging behaviour and body condition of cattle. On average,... -
The quantification of grazing capacity from grazing — and production values for forage species in semi-arid grasslands of southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: HC van der Westhuizen HA Snyman WLJ van Rensburg JHJ PotgieterThe relation between rangeland condition and grazing capacity was determined along a degradation gradient. In studying agronomic values of forage species, the average production per tuft was combined with its grazing preferences, to link grazing values for species in the... -
Quantified range condition assessment of open Camelthorn savanna along a degradation gradient
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: I Zimmermanno FP Graz MH Berry NNT Imasiku ND Muroua MM Sibalatani CS SikopoMeasurements were taken at 20 different sites in a relatively homogenous area of open Camelthorn savanna in eastern Namibia. Ordination of grass species composition did not provide a good degradation gradient, due to domination by different species of annual grasses... -
Production and decomposition of plant litter in an arid rangeland of Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: WN Ekaya JI KinyamarioData on litter production and decomposition in an arid rangeland in Kenya was collected over a two-year period. Utter sampling was carried out at monthly intervals using a rectangular 0.25m−2 quadrat frame. Utter within the quadrats was handpicked and washed... -
Diet selection of goats in the communally grazed Richtersveld National Park
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: HH Hendricks PA Novellie WJ Bond JJ MidgleyThe study provided an account of the diet selection of goats within the Richtersveld National Park and focused on (a) diet composition, (b) plant growth-forms, (c) principal and preferred food plants. The conservation status of these food plants was also... -
Estimated spatial requirements of the medium- to large-sized mammals, according to broad habitat units, in the Cape Floristic Region, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AF Boshoff GIH Kerley RM CowlingConservation planning in the Cape Floristic Region (CFR) of South Africa, a recognised world plant diversity hotspot, required information on the estimated spatial requirements of selected medium- to large-sized mammals within each of 102 Broad Habitat Units (BHUs) delineated according... -
Tree canopies facilitate invasion of communal savanna rangelands by Lantana camara
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J G Rodger W C TwineThis study investigated pattern in the distribution of the alien invasive shrub, Lantana camara L., in communal versus conservation land-use in a lowveld savanna. Pattern was investigated relative to land-use type, and sub- or inter-canopy micro-sites. Lantana was significantly more... -
Effects of sowing rate on growth and protein contents of wall barley (Hordeum murinum L.) grown under Mediterranean conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M K J El-Shatnawi M Turk H M SaoubAccurate control of the seeding rate favours the establishment of a high-quality stand. Improper seeding rates waste seed and reduce potential yield. Our objective for this research is to determine the proper sowing rate for wall barley (Hordeum murinum L.)... -
Effect of Balanites glabra canopy cover on grass production, organic matter and soil moisture in a southern Kenyan rangeland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: VO Wasonga RK Ngugi DM Nyariki G Kironchi TJ NjokaA study was undertaken in Kenya's southern savanna rangelands to determine the seasonal effect of Balanites glabra canopy cover on aboveground grass biomass, grass species composition, soil organic matter and soil moisture content. The study was conducted during the period... -
Ecological effects of fire-breaks in the montane grasslands of the southern Drakensberg, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TG O'Connor RG Uys AJ MillsFire-breaks, by legislation, are burnt annually before mid-winter in the southern Drakensberg, affecting 5–10% of the landscape, and resulting in marked selection for the early season flush by both livestock and wildlife. This study investigated whether this severe defoliation regime... -
Seasonal botanical and chemical composition of sheep and goat diets on a common range in eastern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: RobinsonK Ngugi JosephN Ndung'u DicksonM Nyariki NashonKR MusimbaThe botanical and chemical composition, intake and digestibility of local sheep (Ovis aries) and goat (Capra hirtus) diets were evaluated over the wet (growing) and dry (dormant) seasons. Diet botanical composition was related to the vegetation composition on the range... -
Soil seed bank evaluation and seedling establishment along a degradation gradient in a semi-arid rangeland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: HA SnymanThe effects of rangeland degradation on the size and species composition of the seed bank and seedling establishment in the field were quantified over a two year period (2000–2001 and 2001–2002 growing seasons). Soil seed bank sampling was carried out... -
Aboveground phytomass productivity and morphological variability of Tunisian accessions of Cenchrus ciliaris L.
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Khalil Mseddi Lobna Mnif Mohamed Chaieb Mohamed Neffati Maurice RouxThis study assessed the aboveground aerial phytomass produced by 47 accessions of Cenchrus ciliaris L. locally collected in the arid zone of Tunisia and classified into six eco-geographic groups. The extent of genetic variation in five morphologic parameters was examined... -
Maasai Mara — an ecosystem under siege: an African case study on the societal dimension of rangeland conservation
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: John Waithaka'Let me assure you all that our commitment to the preservation of wildlife and the habitat in the Maasai Mara reserve is total. We do not deny that the reserve is of vital economic importance to us, but we also... -
Remote sensing and change detection in rangelands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AnthonyR. Palmer Alex FortescueDuring the 20 th century, we have witnessed an improvement in the quality of imagery available for rangeland auditing, from the earliest mono-chromatic aerial photographs, followed by the first infra-red images, to the abundance of high resolution, multi-spectral imagery currently... -
Scale, heterogeneity and secondary production in tropical rangelands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Andrew Ash John Gross Mark Stafford SmithTropical rangelands across the world are experiencing land use intensification pressures which are reducing the spatial scale of grazing management units. There are implications of a reduction in scale on environmental heterogeneity and its relationship with secondary production of large... -
Use and availability of tree and shrub resources on Maasai communal rangelands near Amboseli, Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: John Warui Kiringe Moses Makonjio OkelloUse of plant resources is critical in understanding resource dependence among poor rural communities. This study investigated use of tree and shrub resources by a local Maasai community, through discussions and a questionnaire. Twenty-four tree and shrub species were utilised... -
A comparison of the effects of different rangeland management systems on plant species composition, diversity and vegetation structure in a semi-arid savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Smet D WardMost of South Africa's land surface is arid or semi-arid rangeland. Three management systems exploit these areas: commercial livestock ranching, communal livestock ranching and game ranching. The ways in which these management systems affect rangeland ecology is contentious due to... -
Plant invaders, global change and landscape restoration
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: DA Pyke ST KnickModifications in land uses, technology, transportation and biogeochemical cycles currently influence the spread of organisms by reducing the barriers that once restricted their movements. We provide an overview of the spatial and temporal extent for agents of environmental change (land... -
Do we understand the causes of bush encroachment in African savannas?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: D WardBush encroachment affects the agricultural productivity and biodiversity of 10–20 million ha of South Africa. Many people believe that we understand the causes of bush encroachment. We do not. Many people believe that either fire or heavy grazing by domestic... -
Genetic variation between ecotypic populations of Chloris roxburghiana grass detected through RAPD analysis
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: W Ngoyawu Mnene J Hanson WN Ekaya JI Kinyamario P Mweki G Lall JW Stuth RH JamnadassChloris roxburghiana is an important rangeland grass in Kenya. In some areas it has disappeared due to land degradation resulting from overgrazing and drought. Efforts to re-introduce the grass through re-seeding using seeds from research stations have had little success... -
Tackling 'the most avoided issue': communal rangeland management in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MI PedenDemocratisation in 1994 resulted in a shift in state focus from white commercial farmers to small-scale and subsistence black farmers living in communal areas in South Africa. The LandCare Program of the National Department of Agriculture aimed to improve productivity... -
The extent of grass species composition in Braklaagte, Zeerust District, North-West Province, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: PW Malan S Van NiekerkGrassland retrogression in tribal areas is evident. Long-term overgrazing by livestock plays an important role in grassland retrogression. Palatable species are the first to disappear and are then followed by the non-palatable species. Mismanagement and the incorrect grazing strategies by... -
Effects of land tenure, geology and topography on vegetation and soils of two grassland types in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S Vetter WM Goqwana WJ. Bond WW TrollopeA national degradation audit conducted in South Africa in the late 1990s found communal land tenure to be the strongest predictor of vegetation and soil degradation, while abiotic factors such as geology, slope and aspect were also correlated with degradation... -
Brushpiles and dung as rehabilitation patches: effect on soil resources in degraded succulent thicket, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: WB Todkill GIH Kerley EE CampbellA substantial portion of the Thicket Biome in the Eastern Cape has been transformed by overgrazing. An experimental rehabilitation study of degraded succulent thicket was initiated to determine whether increasing the patchiness on the landscape would result in an increase... -
Rangeland condition and trend in the semi-arid Borana lowlands, southern Oromia, Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Gemedo-Dalle BL Maass J IsselsteinRangeland condition assessment was conducted in the Borana lowlands, southern Ethiopia to determine the current status and future trend of the grazing land with emphasis on comparing different functional land use units, called Kalo, Worra and Foora. An approach that... -
A contiguous-quadrat sampling exercise in a shrub-invaded grassland patch: size matters but biggest is not best
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J Goodall P Zacharias T Olckers T EdwardsWe attempted to ascertain the most effective sample size for monitoring serial changes in the herbaceous layer of fragmented and neglected grasslands that are responding to annual veld burning. We conducted a sampling exercise in a coastal grassland invaded by... -
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... -
Livestock utilisation of grass species at different distances from water on both traditional cattle post and ranch management systems in Botswana
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: WN Mphinyane NFG RethmanIndividual forage species were appraised in varying distances along transects radiating from the water points of the ranch and traditional cattle post management systems. Measurements of plant height were used to assess the degree of forage species utilisation by livestock... -
Pilot survey to assess sample size for herbaceous species composition assessments using a wheel-point apparatus on the Zululand coastal plain
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: BH BrockettA pilot survey to determine sub-sample size (number of point observations per plot) for herbaceous species composition assessments, using a wheel-point apparatus applying the nearest-plant method, was conducted. Three plots differing in species composition on the Zululand coastal plain were... -
Dry matter yield and water use efficiency of five perennial subtropical grasses at four levels of water availability
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: D Marais N Rethman J AnnandaleThe effect of four levels of water availability on the yield and water use efficiency (WUE) of five subtropical perennial grasses was evaluated in a small plot trial under a rain shelter. The soil profiles were brought to 100% (W4... -
Using rain-use efficiency to explore livestock production trends in rangelands in the Transkei, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AR Palmer A AinslieWe qualitatively describe the condition of communally managed rangelands in the Transkei, South Africa, using GIS and high resolution near-infrared imagery. Using livestock census data from 28 magisterial districts in the Transkei, we explored the trends in livestock biomass from... -
Effects of season and frequency of burning on soils and landscape functioning in a moist montane grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AD Manson D Jewitt AD ShortThe effects of burning on soil properties and landscape function were investigated in a long-term experiment comparing different burning strategies in a moist montane grassland. Total C, total N, total S, bulk density, plant-available nutrients, and soil acidity were determined... -
The effect of long-term fire treatments on invertebrates: results from experimental plots at Cathedral Peak, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C Uys M HamerThis study examined the impacts of different burning regimes (fire frequency and season) and fire history (time since last burn) on invertebrate morphospecies richness and abundance. The study was carried out in the Brotherton experimental plots at Cathedral Peak in... -
Effects of herbivore exclosures on variation in quality and quantity of plants among management and habitat types in a semiarid savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: KR Mbatha --- Department of Conservation Ecology, South Africa D Ward --- School of Biological and Conservation Sciences, South AfricaThe effects of grazing on plant biomass, plant quality, species evenness, species diversity and species composition were determined among management types (communal, commercial and game) and among habitat types (open savanna, rocky and pan) in a semiarid savanna in South... -
Effects of previous cultivation on regeneration of Julbernadia globiflora and Brachystegia spiciformis in grazing areas of Mupfurudzi Resettlement Scheme, Zimbabwe
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T Chinuwo --- Faculty of Agriculture, Science and Technology, South Africa E Gandiwa --- , Zimbabwe PH Mugabe --- Institute of Environmental Studies, Zimbabwe IDT Mpofu --- Animal Science Department, Faculty of Agriculture and Natural Resources, Namibia E Timpong-Jones --- College of Agriculture, Agricultural Research Centre, GhanaWe investigated the effects of previous cultivation on regeneration potential under miombo woodlands in a resettlement area, a spatial product of Zimbabwe's land reforms. We predicted that cultivation would affect population structure, regeneration, recruitment and potential grazing capacity of rangelands... -
New Sudangrass forage cultivars selected from the original population (Sorghum bicolor ‘Garawi’, syn. S. sudanense)
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MaaroufI Mohammed --- Forage Research Program, SudanThe study represents the first efforts since 1909 to develop improved Sudangrass (Sorghum bicolor (L.) Moench, syn. S. sudanense (Piper) Stapf) cultivars from the original genetic stock existing in the Sudan. Seven Sudangrass genotypes generated by individual plant selection within... -
Allelopathic potential, seed ecology and germination of the encroacher shrub Seriphium plumosum
Item type: Journal Article • Journal: African Journal of Range & Forage Science • 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. In addition to its competitive ability, it is hypothesised that the encroachment of S. plumosum is linked to the allelopathic potential of the plant... -
The effect of defoliation and competition on the regrowth of Themeda triandra and Aristida junciformis subsp. junciformis
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C.D. Morris --- Agricultural Research Council, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaThe effects of a cutting trial, conducted to study the combined influence of defoliation and competition from surrounding vegetation on the vigour of Themeda triandra and Aristida junciformis, were evident after the single season of treatment implementation. Aristida junciformis was... -
The relation between herbivore density and relative resource density at the landscape level: Kudu in semi‐arid savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C. Fabricius --- , Republic of South AfricaEcological theory can help range scientists to understand the determinants of ecological animal density or, in range management terms, ‘carrying capacity’. The relation between the relative density of resources and herbivore density is illustrated by regressions of the ecological density... -
Towards identifying the fate of 15N applied in spring as ammonium nitrate fertiliser to a kikuyu pasture
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G.D. Hefer --- Department of Grassland Science, Republic of South Africa D.C. Pretorius --- Department of Grassland Science, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaNitrogen was applied as ammonium nitrate in solution to kikuyu pasture at 225 kg N ha‐1, split into three equal dressings and applied in October, December and February. The first, at 75 kg N ha‐1 was labelled in the ammonium... -
Small‐scale reseeding trials in arid rangeland: Effects of rainfall, clearing and grazing on seedling survival
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S.J. Milton --- FitzPatrick Institute, Republic of South AfricaSeeds of four indigenous plant species were sown in 1990 in small‐scale field trials in an arid, non‐seasonal rainfall region of the southern Karoo, South Africa. Seeds of a winter annual Tetragonia echinata (Aizoaceae) showed innate dormancy but those of... -
Implications of changes to the transhumance system for conservation of the mountain catchments in eastern Lesotho
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T. Quinlan --- Institute for Social and Economic Research, Republic of South Africa C.D. Morris --- Agricultural Research Council, Republic of South AfricaThe mountain catchments above 2 750 m a.s.l. in eastern Lesotho are a proclaimed Managed Resource Area (MRA) as a result of official concern about degradation of the grasslands of the alpine belt, and of recent parastatal interventions in the... -
Evapotranspiration, water‐use efficiency and quality of six dryland planted pasture species and natural vegetation, in a semi‐arid rangeland1
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: H.A. Snyman --- Department of Grassland Science, Republic of South AfricaHydraulic, non‐floating lysimeters were used to determine evapotranspiration (Et) and water‐use efficiency (WUE) of several dryland planted pasture species over a period of three years. The species were Anthephora pubescens, Cenchrus ciliaris, Chloris gayana, Digitaria eriantha subsp. eriantha, Eragrosiis curvula... -
Perspective: Improvement in rangeland condition of the Flooding Pampa of Argentina through controlled grazing
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: V.A. Deregibus --- Faculty of Agronomy, Argentina E. Jacobo --- Faculty of Agronomy, Argentina A. Rodriguez --- Faculty of Agronomy, ArgentinaThe Flooding Pampa grasslands situated in temperate Argentina were ungrazed historically, but now support primarily breeding herds of cattle. These extensive, flat, infertile grasslands experience seasonal floods. Although summer droughts are usual, grasses maintain productivity during the entire year and... -
Investigation of the potential ingestion rates of different sourveld grasses by cattle and sheep
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.J. O'Reagain --- , Republic of South Africa B.C. Goetsch --- , Republic of South AfricaQuantification of the potential ingestion rates of different grasses is important for modelling purposes but is difficult to achieve under field conditions. The ingestion rates of the sourveld species Alloteropsis semialata, Andropogon appendiculatus, Cynodon dactylon, Eragrostis plana, Heteropogon contortus, Hyparrhenia... -
Effect of management factors on tiller dynamics in tall fescue: Tiller initiation
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: R.L. Phillips --- KwaZulu‐Natal Department of Agriculture, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa J.D.H. Reusch --- , Republic of South Africa D.E.A. Cumming --- Department of Grassland Science, Republic of South AfricaThe effect of plant density (row spacing / seeding rate), nitrogen (N) fertilization, cultivar choice and close‐down date on tiller initiation in tall fescue (Festuca arundinacea Schreb.), managed for seed production, was examined over two years. In the first season,... -
Effect of management factors on tiller dynamics in tall fescue: Tiller mortality
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: R.L. Phillips --- KwaZulu‐Natal Department of Agriculture, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa J.D.H. Reusch --- , Republic of South Africa D.E.A. Dimming --- Department of Grassland Science, Republic of South AfricaThe effect of plant density (row spacing / seeding rate), cultivar choice, nitrogen (N) fertilization and close‐down date on tiller mortality in a dual purpose (forage and seed) tall fescue (Festuca arundinacea Schreb.) sward was examined over a two‐year period... -
Effect of management factors on tiller dynamics in tall fescue: Numbers of tillers reaching reproductive maturity
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: R.L. Phillips --- KwaZulu‐Natal Department of Agriculture, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa J.D.H. Reusch --- , Republic of South Africa D.E.A. Cumming --- Department of Grassland Science, Republic of South AfricaThe effect of plant density (row spacing / seeding rate), cultivar choice, nitrogen (N) fertilization and close‐down date on the number of reproductive tillers surviving to maturity in tall fescue (Festuca arundinacea Schreb.) was examined over a two‐year period. A... -
Plant and sward response to patch grazing in the Highland Sourveld
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: B.U. Lütge --- Department of Grassland Science, Republic of South Africa M.B. Hardy --- KwaZulu‐Natal Department of Agriculture, Republic of South Africa G.P. Hatch --- Department of Grassland Science, Republic of South AfricaSelective grazing by livestock inevitably results in patch grazing. This study was initiated to determine the effects of patch grazing on (1) the vigour of a single grass species, Themeda triandra, and of the sward, and (2) sward species composition... -
Responses of productive and unproductive kikuyu pastures to top‐dressed nitrogen and phosphorus fertiliser
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: N. Miles --- KwaZulu‐Natal Department of Agriculture, Republic of South AfricaIn South Africa there is widespread reliance on kikuyu grass as a source of summer forage for intensive dairy, beef and sheep enterprises. There is, however, a dearth of reliable information on the fertility requirements of kikuyu pastures. Responses of... -
Soil nutrient ecology associated with Acacia sieberana at different tree densities in a South African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C. Roos --- Department of Terrestrial Ecology and Nature Conservation, The Netherlands N. Allsopp --- ARC Range and Forage Institute, c/o Botany Department, Republic of South AfricaThree aspects of soil nutrient ecology in an Acacia sieberana savanna were studied. First, information was collected about the effects of the savanna tree species Acacia sieberana on soil fertility, in terms of isolated tree effects and in terms of... -
Perspective article: Simulation models for semi‐arid rangelands of southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T. Wiegand --- Department of Ecological Modelling, Germany F. Jeltsch --- Department of Ecological Modelling, Germany S. Bauer --- Department of Ecological Modelling, Germany K. Kellner --- Department of Plant‐ and Soil Sciences, South AfricaIn semi‐arid regions, the effects of grazing or sparing management on natural communities of long‐lived plants generally take decades to become evident. Event‐driven dynamic behaviour, unpredictable and low rainfall, and complicated interactions between species make it difficult to gather sufficient... -
Research note: Evaluation of the reliability of local farmer knowledge in Namaqualand, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: H.H. Hendricks --- Botany Department, Republic of South Africa F. van der Heyden --- , Republic of South AfricaLocal farmer knowledge of species distribution patterns and plant palatability in Namaqualand, South Africa, was assessed using Participatory Rural Appraisal techniques. These findings were compared with the results obtained using phytosociological techniques (species distribution), and with palatability indices published in... -
Which grazing management practices are most appropriate for maintaining biodiversity in South African grassland?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TG O'Connor --- , South Africa P Kuyler --- Centre for Environmental Management, Faculty of Natural and Agricultural Sciences, South Africa KP Kirkman --- School of Biological and Conservation Sciences, South Africa B Corcoran --- , South AfricaThe relative benefit of different grazing management practices for maintaining grassland biodiversity integrity was assessed. Practices considered were grazing system, stocking rate, animal type, grazing season, fire–grazing interaction, plus burning regime. Sparse empirical data indicated that stocking rate, cattle-to-sheep ratio,... -
Physicochemical characteristics of communal rangeland soils along two defined toposequences in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MS Lesoli --- Department of Livestock and Pasture Science, South Africa S Dube --- Department of Livestock and Pasture Science, South Africa AO Fatunbi --- Agricultural and Rural Development Research Institute, South Africa B Moyo --- Department of Livestock and Pasture Science, South AfricaTo proffer a sustainable solution to rangeland degradation, an understanding of the innate soil properties is vital. This study investigated the relative association of surface (0–20 cm) soil physicochemical properties, viz. electrical conductivity, cation exchange capacity (CEC), soil organic carbon,... -
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... -
Biomass production and water use efficiency of grassland in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AR Palmer --- , South Africa A Short --- , South Africa IAM Yunusa --- , AustraliaUsing the results from a long-term grazing trial in the Dry Highland Sourveld of the KwaZulu-Natal province, we prepared a water use efficiency value (the ratio of the increment in annual biomass to total annual evapotranspiration) for this rangeland type... -
Botanical composition, yield and nutritional quality of grassland in relation to stages of harvesting and fertiliser application in the highlands of Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Z Tessema --- Department of Animal Sciences, Ethiopia A Ashagre --- , Ethiopia M Solomon --- Debre Zeit Agricultural Research Centre, EthiopiaLivestock production contributes to the livelihoods of the Ethiopian people; however, the productivity of the livestock subsector in the highlands is low due to malnutrition. Therefore, this study assessed the botanical composition, dry matter (DM) yield, chemical composition and in... -
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... -
Detecting the onset of rangeland degradation using soil respiration and boundary lines: preliminary findings from the Nama Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: A Mills --- Department of Soil Science, South Africa M Fey --- School of Earth and Environment, Australia B Kgope --- , South Africa J Donaldson --- , South Africa J de W Bosenberg --- , South AfricaMean annual soil respiration correlates with net primary productivity and therefore provides an indication of ecosystem functioning. Soil respiration, however, varies considerably in space and time owing to the influence of factors such as soil nutrient content, temperature and water... -
Short-term response of the encroacher shrub Seriphium plumosum to fire
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: HA Snyman --- Department of Animal, Wildlife and Grassland Sciences, South AfricaQuantification of the short-term impact of burning in terms of the encroacher shrub Seriphium plumosum and grass tuft mortality, seed germination of the shrub (field and seed bank), aboveground phytomass production, plant density and basal cover of the grass sward... -
Effect of a single fire on woody vegetation in Catchment IX, Cathedral Peak, KwaZulu-Natal Drakensberg, following extended partial exclusion of fire
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AD de Villiers --- Animal, Plant and Environmental Sciences, South Africa T O'Connor --- Grassland Node, South AfricaFire is a key driver in shaping and maintaining grasslands. Long-term exclusion of fire in moist grasslands has been attempted at Catchment IX (CIX) at Cathedral Peak since 1952. Vegetation was surveyed in 1952, 1973, 1986 and 2009. Woody colonisation... -
Impact of Prosopis (mesquite) invasion and clearing on the grazing capacity of semiarid Nama Karoo rangeland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T Ndhlovu --- Department of Conservation Ecology and Entomology, South Africa SJ Milton-Dean --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa KJ Esler --- Department of Conservation Ecology and Entomology, South AfricaWe assessed the impact of Prosopis invasion and clearing on the grazing capacity of heavily grazed Nama Karoo rangeland in the Beaufort West district of the Western Cape province of South Africa. Invasion (c. 15% Prosopis canopy cover) reduced grazing... -
The effect of soil carbon on symbiotic nitrogen fixation and symbiotic Rhizobium populations in soil with Trifolium repens as host plant
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: PA Swanepoel --- Technology, Research and Development, Department of Agriculture: Western Cape, South Africa PR Botha --- Technology, Research and Development, Department of Agriculture: Western Cape, South Africa WF Truter --- Department of Plant Production and Soil Science, South Africa AKJ Surridge-Talbot --- Department of Plant Production and Soil Science, South AfricaSoil organic carbon (SOC) is the main attribute of high-quality soil. The amount of nitrogen fixed by Rhizobium symbiotically with Trifolium repens (white clover) is ultimately determined by the quality of the soil environment. The effect of SOC on the... -
Impacts of high utilisation pressure on biodiversity components in Colophospermum mopane savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MC Rutherford --- SANBI, Applied Biodiversity Research Division, South Africa LW Powrie --- SANBI, Applied Biodiversity Research Division, South Africa DI Thompson --- NRF/SAEON, South AfricaThis study aimed to quantify and evaluate the effects of heavy land utilisation, mainly grazing, on plant species richness and diversity, species abundance, vegetation structure and soil characteristics in a communal area in Colophospermum mopane dominated savanna in southern Africa... -
Volume–biomass functions reveal the effect of browsing on three Moroccan dwarf shrubs
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Z Akasbi --- Biodiversity, Evolution and Ecology of Plants, Germany J Oldeland --- Biodiversity, Evolution and Ecology of Plants, Germany J Dengler --- Biodiversity, Evolution and Ecology of Plants, Germany M Finckh --- Biodiversity, Evolution and Ecology of Plants, GermanyWe studied the effects of browsing on the plant architecture and volume-biomass relationships of three dominant dwarf shrubs – Artemisia herba-alba, A. mesatlantica and Teucrium mideltense – in a sagebrush steppe in the Central High Atlas Mountains, southern Morocco. For... -
Of goats and spines – a feeding experiment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C Skarpe --- Department of Forestry and Wildlife Management, Norway R Bergström --- Department of Wildlife, Fish and Environmental Studies, Sweden K Danell --- Department of Wildlife, Fish and Environmental Studies, Sweden H Eriksson --- , Italy C Kunz --- , SwedenSpines in plants have evolved to reduce mammalian herbivory, and their main function may be to protect twigs more than photosynthetic tissue. Type and frequency of spines vary at different scales. We hypothesised that different types of spines affect animal... -
Challenges and opportunities in the use of remote sensing for C3 and C4 grass species discrimination and mapping
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C Adjorlolo --- School of Agriculture, Earth and Environmental Sciences, South Africa O Mutanga --- School of Agriculture, Earth and Environmental Sciences, South Africa MA Cho --- School of Agriculture, Earth and Environmental Sciences, South Africa R Ismail --- School of Agriculture, Earth and Environmental Sciences, South AfricaChanges in the composition of plant functional type (PFT) activities are expected to accompany a changing climate. In tropical montane grasslands, such changes are predicted to follow shifts in the percentage cover and abundance of species following the C3 and... -
Herbaceous plant species richness and composition in moist Midlands Mistbelt Grasslands in KwaZulu-Natal: is there a relationship to veld condition?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P Ngwenya --- , South AfricaThis study investigated the relationship between grazing veld condition and herbaceous plant species richness in the moist Midlands Mistbelt Grassland in KwaZulu-Natal. The observed herbaceous plant species richness and composition of 12 sample plots (50 m × 50 m) was... -
The influence of Pechuel-Loeschea leubnitziae (wild sage) on grass sward and soil seed bank composition
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MJ Tedder --- Grassland Science, School of Life Sciences, South Africa KP Kirkman --- Grassland Science, School of Life Sciences, South Africa CD Morris --- Agricultural Research Council, c/o School of Life Sciences, South Africa WSW Trollope --- Research and Development, South Africa MC Bonyongo --- Okavango Research Institute, BotswanaSoil seed banks provide not only a historical record of vegetation composition but also the potential for post-disturbance revegetation. Pechuel-Loeschea leubnitziae (wild sage) is a multistemmed, aromatic shrub, occurring in Namibia, Botswana, Swaziland, Zimbabwe and the northern regions of South... -
The vegetation of Malilangwe Wildlife Reserve, south-eastern Zimbabwe
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: BW Clegg --- The Malilangwe Trust, Research, Zimbabwe TG O'Connor --- School of Animal, Plant and Environmental Science, South AfricaThe vegetation of Malilangwe Wildlife Reserve in Zimbabwe (39 378 ha) was classified and mapped in 2003 using an integrated approach of ground-based measurement and remote sensing. Environmental variables, structure and composition of the tree, shrub and herbaceous layers were... -
Bush clump succession in grassland in the Kei Road region of the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TG O'Connor --- , South Africa SC Chamane --- , South AfricaBush encroachment is a vegetation dynamic of global interest. This study describes the pattern of succession of bush clumps in the Eastern Cape, South Africa, using a space-for-time substitution. Clumps formed following establishment of mainly Acacia karroo in grassland through... -
Development and sustainable management of rangeland commons – aligning policy with the realities of South Africa's rural landscape
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Susanne Vetter --- Department of Botany, South AfricaPolicy affecting the rangeland commons in South Africa has been based largely on management models developed for large-scale commercial farming. This paper examines the current policy situation and discusses some of the most pervasive ecological and economic assumptions that have... -
Wildlife or livestock? New directions for developing communal rangelands in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Petronella Chaminuka --- Department of Agricultural Economics, South AfricaThe paper agrees with three fundamental points raised by Vetter (in this issue), whilst highlighting an emerging trend in wildlife land use, which should be considered in policy making. Firstly, the paper supports the argument that communal rangelands are important... -
Multiple strategies for resilient livelihoods in communal areas of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Wayne Twine --- School of Animal, Plant and Environmental Sciences, South AfricaLivestock farming in communal areas is an activity pursued by rural households as one of a range of livelihood strategies aimed at spreading risk. The cash and non-cash benefits derived from livestock, as well as the wide range of secondary... -
Livestock and the rangeland commons in South Africa's land and agrarian reform
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ruth Hall --- Institute for Poverty, Land and Agrarian Studies, South Africa Ben Cousins --- Institute for Poverty, Land and Agrarian Studies, South AfricaLand and agrarian reform has the potential to expand South Africa's rangeland commons and enhance their contribution to the livelihoods of the rural poor, yet to a large extent this has been an opportunity missed. Shifting policy agendas have prioritised... -
The sociocultural contexts and meanings associated with livestock keeping in rural South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Andrew Ainslie --- School of Agriculture, Policy and Development, UKThis paper complements Vetter's position paper, ‘Development and sustainable management of rangeland commons – aligning policy with the realities of South Africa's rural landscape’ (Vetter in this issue). It seeks to advance the debate regarding the contemporary nature of livestock... -
Institutions and governance of communal rangelands in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JamesE Bennett --- Department of Geography, Environment and Disaster Management and Centre for Agroecology and Food Security, UKThe creation of local institutions with a mandate over land access and control is seen as a prerequisite for successful decentralisation of land tenure and effective local resource management in sub-Saharan Africa. However, with land tenure reform in South Africa... -
The ‘youth and agriculture’ problem: implications for rangeland development
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MelvinB Swarts --- Agricultural Research Council–Animal Production Institute, c/o Department of Biodiversity and Conservation Biology, South Africa Michael Aliber --- Institute for Poverty, Land and Agrarian Studies, South AfricaThere is a common perception in South Africa that the youth are not interested in agriculture, leading to two concerns: first, that this is exacerbating the youth unemployment crisis, and second, that the already low levels of agricultural activity in... -
Degradation of communal rangelands in South Africa: towards an improved understanding to inform policy
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AnthonyR Palmer --- , South Africa JamesE Bennett --- Department of Geography, Environment and Disaster Management and Centre for Agroecology and Food Security, UKIn South Africa, the relative extent of range degradation under freehold compared to communal tenure has been strongly debated. We present a perspective on the processes that drive rangeland degradation on land under communal tenure. Our findings are based on... -
How could herd mobility be used to manage resources and livestock grazing in semi-arid rangeland commons?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Igshaan Samuels --- Agricultural Research Council–Animal Production Institute, c/o Botany and Conservation Biology Department, South Africa Nicky Allsopp --- , South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South AfricaPastoralists in Namaqualand, South Africa, use herd mobility to manage livestock and rangeland resources. However, their socioeconomic conditions and ecological landscapes are changing and we explore the options that are available for pastoralists to respond to these changes. This paper... -
The good shepherd: remedying the fencing syndrome
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Monique Salomon --- Farmer Support Group, South Africa Clement Cupido --- Agricultural Research Council–Animal Production Institute, c/o Department of Biodiversity and Conservation Biology, South Africa Igshaan Samuels --- Agricultural Research Council–Animal Production Institute, c/o Department of Biodiversity and Conservation Biology, South AfricaIn this paper the use of fenced grazing camps to manage the rangeland commons is challenged. A historical perspective is presented on fencing and rotational grazing in South Africa. Two case studies in KwaZulu-Natal and the Northern Cape illustrate the... -
Reshaping women's land rights on communal rangeland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Karin Kleinbooi --- Institute for Poverty, Land and Agrarian Studies, South AfricaThis paper aims to contribute to the debates on communal rangelands and analyses the gendered dimension of land rights and land access in the rural areas of Namaqualand. The actual gender relations within rural communities and the emergence of strategies... -
Reforming communal rangeland policy in southern Africa: challenges, dilemmas and opportunities
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Martin Adams --- , UKIn the savanna rangelands of southern Africa, the debate about land reform tends to be about the redistribution of formerly freehold ranches and fencing-off the rangeland commons into ranches for better-off African farmers. The position of those who favour privatisation... -
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... -
Identifying key grazing indicators to monitor trends in the veld condition of Lambert's Bay Strandveld, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Nelmarie Saayman --- Directorate: Plant Science, South Africa Craig Morris --- Agricultural Research Council–Animal Production Institute, South Africa Hannes Botha --- Directorate: Plant Science, South AfricaCurrently, the methods used to assess the veld condition of the Lambert's Bay Strandveld along the West Coast of South Africa require that the operator knows all the plants encountered in the survey area. In this study data were collected... -
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... -
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,... -
A description of rangeland on commercial and communal land, Peddie district, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: L.N. Kiguli A.R. Palmer A.M. AvisAnalysis of a Landsat TM image from a rangeland near Peddie, Eastern Cape, revealed differences in two vegetation indices (normalised difference vegetation index, NDVI, and moving standard deviation index, MSDI) between communal and commercial rangeland. It was suggested that the... -
The influence of sowing rate on the production and growth of wild oat (Avena fatua) in the depleted semi-arid rangelands of Jordan
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M.K.J. El-Shatnawi H.Z. GhoshehThe objective of this work was to determine the proper sowing rate of wild oat (Avena fatua) in the depleted north-eastern semi-arid grasslands of Jordan. Wild oat seeding rates of 15, 30, 45 and 60 kg ha−l were evaluated in... -
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... -
Precision forestry for pulpwood re-establishment silviculture
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Robert Neil PallettThe Southern African pulp and paper industry has a strong export focus and operates in an open global market. In a global context, wood is a commodity product and an ongoing strategy of reduction in the unit cost of timber... -
Host plants of Osyris lanceolata (African Sandalwood) and their influence on its early growth performance in Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: P.L. Mwang'ingo Z. Teklehaimanot L.L. Lulandala S.T. MwihomekeIdentification of the host plants of the hemi-parasitic African sandalwood (Osyris lanceolata) and the influence of some on its early growth performance was investigated at Image, Nundu, Sao Hill and Iringa in the southern highlands of Tanzania. The aim was... -
Root volume and raising period affect field performance of Pinus patula cuttings in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchell J. Zwolinski N. B. Jones A. D. BayleyThe propagation of pines through cuttings has become a commercial means of rapidly multiplying improved genetic material for operational use in forestry companies. Cuttings of pines are produced entirely in containers in South Africa. Containers, however, can negatively affect plant... -
Production speed effects on log-making error rates and value recovery for a mechanized processing operation in radiata pine in New Zealand
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: G.E. Murphy H.D. Marshall A.W. EvansonMechanized processing operations are complex "man-machine" systems. The impacts of changes to work practices are, therefore, dependent on the effects the changes have on both the machine and the man. A mechanized processor, delimbing and cutting tree length stems into... -
Application of a 'stem number guide curve' for sustainable harvest control in the dry woodland savanna of northern Namibia
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: F. P. Graz K. von GadowThe savanna woodlands of north-eastern Namibia are a significant source of essential resources for the rural population. Thus far, however, there is little or no growth data available to predict future timber supplies and current yield regulation is limited to... -
The effect of planting density on the wood quality of South African-grown Eucalyptus grandis
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: F.S. MalanThis paper presents the results of a wood property and sawn board quality study performed on disc samples and sawlogs taken from a 23-year-old Eucalyptus grandis Nelder 1a spacing trial at J.D.M. Keet plantation near Tzaneen. Ten trees from each... -
Propagating Osyris lanceolata (African sandalwood) through air layering: Its potential and limitation in Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: P.L. Mwang'ingo Z. Teklehaimanot L.L. Lulandala S.M. MaliondoPropagation of African sandalwood (Osyris lanceolata) by air layering (marcotting) was investigated at Sao Hill, Tanzania, aiming at providing an alternative propagation technique to the use of seeds or cuttings that germinate or root poorly. Air layers were initiated on... -
Modeling woody vegetation resources using Landsat TM imagery in northern Namibia
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Alex Verlinden Risto LaamanenIn 1995 a forest inventory covering northern Namibia was initiated, based on stratified systematic field sampling of plots with a radius of up to 30 m. In these plots detailed tree parameters were measured. Due to security problems the most... -
In vitro shoot multiplication and rooting from seedling explants of Pterocarpus angolensis in Zambia
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Exildah Chisha-Kasumu AdamH. Price Steve WoodwardPterocarpus angolensis is a savanna tree species growing mostly in the southern part of Africa. Exploitation for its medicinal and commercial uses has led to diminishing of wild populations. Developing reliable in vitro protocols for propagation would enable mass production... -
Palmer Drought Indices and Their Application to Plantation Establishment Strategies
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: J.B. Zwolinski --- ,Palmer drought models are introduced as an objective measure of monthly moisture conditions and their application for forestry research is discussed. A case-study showed that Palmer Hydrological Drought Index was preferred to Palmer Drought Severity Index for deciding on establishment... -
The Effect of Real Price Changes on the Valuation of Timber Plantations
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: H. J.E. Uys --- Department of Forest Science,The well-established method which is applied in South Africa to determine the value of timber plantations ignores real or relative price changes. The omission of real price changes from a plantation valuation can seriously understate or overstate the true value... -
Silviculture and Genetics of Pinus kesiya for Planting Degraded Pasture Land
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: J.A. Wright --- , USA N. Isaza --- , USAThe conifer species, Pinus kesiya Royle ex Gordon, is an important part of the ecology within the indigenous range of South-east Asia as well as in sustainably managed plantations in a number of countries. Planting with the species in Colombia... -
A Protocol for Wildlife Conservation Planning in an Afforestable Montane Grassland Region
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: A.J. Armstrong --- Department of Nature Conservation, South Africa H.J. van Hensbergen --- Department of Nature Conservation, South AfricaThe grassland biome is the biome most transformed by human activity in South Africa. At least thirteen percent of the biome is suitable for pine afforestation. There is a need for conservation evaluations before large-scale commercial afforestation to determine which... -
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,... -
A Survey of Tree Planting Practices in the Smallholder Farming Sector of Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: EnosM. Shumba --- Forest Research Centre, Zimbabwe Abisai Mushaka --- Forest Research Centre, Zimbabwe Joseph Muchichwa --- Forest Research Centre, ZimbabweGroup meetings and individual farm visits were used to establish current tree planting practices in the smallholder farming sector of Zimbabwe. The number of tree species planted in each of the eight districts studied ranged from nine to 27 with... -
Relationships between growth, mineral nutrition and site factors for Eucalyptus camaldulensis (Dehnh) planted in some communal areas of Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Abisai Mushaka --- Forest Research Centre, ZimbabweThe Forestry Commission of Zimbabwe has been implementing a Rural Afforestation Project since 1983. The main species promoted were the eucalypts, especially Eucalyptus camaldulensis (Dehnh). A survey of twenty-seven woodlots of E. camaldulensis with ages between I and 10 years... -
Pinus patula establishment problem associated with poor ectomycorrhizal development in previously cultivated soils
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S. Khalil --- Department of Microbiology and Plant Pathology, South Africa N. Labuschagne --- Department of Microbiology and Plant Pathology, South Africa M.J. Wingfield --- Department of Microbiology and Plant Pathology, South AfricaA field survey of Pinus patula Schlecht. et Cham. plantations at Mondi's Mooi River Estate, Kwazulu-Natal, South Africa was conducted to assess the levels of ectomycorrhizal (EM) fungal colonisation. The objective was to determine whether the establishment problem (old land... -
Certification: Situation analysis of private timber growers in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Cori Ham --- Faculty of Agricultural and Forestry Sciences,Forest certification has become an important aspect to consider in forestry. The South African forestry industry has adopted to a system of forest certification fairly easily. The private timber growers are also expected to implement certification, but can they adapt... -
Staining roots to determine root growth potential of Pinus taeda
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Janusz Zwolinski --- Forestry Programme, South Africa CurtM. Peterson --- Department of Botany and Microbiology, USA Colin Dyer --- , South AfricaRoot growth potential (RGP) consists of two components: elongation of existing roots and initiation of new roots. Currently, RGP is determined on planting stock from which any “white roots” present at the start of the test are removed. This study... -
Adjusting Faustmann's formula for the South African forestry environment
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Eksteen Uys --- Department of Forest Science, South AfricaThe forestry industry in South Africa is characterised by frequent changes in land ownership and the valuation of forestry land consequently forms a regular task of forestry valuers. Traditionally the value of bare forestry land was determined by calculating the... -
Exploring the Reliability and Validity of the DAT-K in Grade 11 Learners in a Historically Disadvantaged School in Johannesburg, South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sumaya Laher --- University of the Witswatersrand, South Africa M. Mokone --- University of the Witswatersrand, South AfricaThis study explored the reliability and validity of the Differential Aptitude Test—Form K (DAT-K) in a sample of 75 learners (mean age = 17.1 years, SD = 1.13) from a previously disadvantaged school in Johannesburg. Adequate reliability coefficients were obtained... -
Psychosocial Well-being in a Group of South African Adolescents
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Izanette van Schalkwyk --- North-West University (Potchefstroom Campus), South Africa Marié P. Wissing --- North-West University (Potchefstroom Campus), South AfricaThe aim of this study was to explore the psychosocial well-being of a group of South African adolescents. Participants (N=665, ages 15–17 years; males = 214, females = 451) from three high schools completed questionnaires on psychosocial well-being. Structured interviews... -
Practitioner Guidelines for Career Counselling in Light of Cross-cultural Influences on WAIS-III IQ Test Performance
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ann B. Shuttleworth-Edwards --- Rhodes University, South AfricaThis article consists of two aspects, including: (i) The delineation of WAIS-III normative date derived from prior research conducted by the present author (Shuttleworth-Edwards et al., 2004) in respect of a black African first language sample in the age range... -
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... -
Delegitimisation of Disliked Political Organisations Through Biased Language and Acronyming
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Tadios Chisango --- University of the Witwatersrand, South Africa Calvin Gwandure --- University of the Witwatersrand, South AfricaThe study investigated the use of biased language and acronyming in political organisations in South Africa and Zimbabwe. The study surveyed the discourses of political parties that were posted on the internet. Thematic content analysis was used to analyse the... -
Psychological Distress and Associated Factors Among a Sample of Pregnant Women in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- Human Sciences Research Council, South Africa Elisa Shikwane --- Human Sciences Research Council, South Africa Gladys Matseke --- Human Sciences Research Council, South AfricaWe sought to identify the prevalence of psychological distress and associated factors among pregnant women who were patients at antenatal primary care clinics in a South Africa district. A cross-sectional study using systematic sampling was conducted among 1497 pregnant women... -
Prevalence of Alcohol Use and Associated Factors in Pregnant Antenatal Care Attendees in Mpumalanga, South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Julia Louw --- Human Sciences Research Council, South Africa Karl Peltzer --- Human Sciences Research Council, South Africa Gladys Matseke --- Human Sciences Research Council, South AfricaWe sought to identify the prevalence of alcohol use and associated factors among pregnant women who were patients at antenatal primary care clinics in a South Africa health district. A cross-sectional study using systematic sampling was conducted among 1497 pregnant... -
Use of Indigenous Stone Play in Child Psychological Assessment
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Nerine Daphné Odendaal --- University of the Western Cape, South Africa Mokgadi Moletsane --- University of the Western Cape, South AfricaThe purpose of the study was to investigate an indigenous stone play called Masekitlana, as a projection technique in child psychological assessment. A qualitative research approach, guided by an interpretivist epistemology, was applied. An intrinsic case study design was employed... -
Speech and Language Disorders in Kenyan Children: Adapting Tools for Regions with Few Assessment Resources
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Julie Anne Carter --- The Centre for Geographic Medicine Research (Coast), Grace Murira --- The Centre for Geographic Medicine Research (Coast), Joseph Gona --- The Centre for Geographic Medicine Research (Coast), Judy Tumaini --- The Centre for Geographic Medicine Research (Coast), Janet Lees --- Neurosciences Unit, Brian George Neville --- Neurosciences Unit, Charles Richard Newton --- The Centre for Geographic Medicine Research (Coast),This study sought to adapt a battery of Western speech and language assessment tools to a rural Kenyan setting. The tool was developed for children whose first language was KiGiryama, a Bantu language. A total of 539 Kenyan children (males=271,... -
A Qualitative Exploration of Women's Work—Life Balance Over the Life Course: A Case Study of Retail Managers
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Shaida Bobat --- University of KwaZulu-Natal, Nosipho Mshololo --- University of KwaZulu-Natal, Shanya Reuben --- University of KwaZulu-Natal,This study examined women's work—life balance (WLB) over the life course in retail management. Ten women (mean age =25) who worked in the centre management of a shopping mall were interviewed. Thematic analysis revealed that they perceived their WLB to... -
Flourishing of Students in a Tertiary Education Institution in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Llewellyn Ellardus Van Zyl --- North-West University (VTC), South Africa Sebastiaan Rothmann --- North-West University (VTC), South AfricaThe aims of this study were to examine the relationship between flourishing and academic performance (AP), life satisfaction (SWT), and positive affect (PA). A quantitative cross-sectional survey design was used on a convenience sample of university students (n = 845)... -
Balanced and Closed-generated Filters In Frames
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Themba DubeWe introduce the notions of balanced filters and closed-generated filters in frames and use them to give a new characterisation of normality for frames, and hence, due to normality being a conservative property, a new characterisation of normality for topological... -
Moments of the Weighted Sum-of-Digits Function
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Gerhard Larcher Friedrich PillichshammerThe weighted sum-of-digits function is a slight generalization of the well known sum-of-digits function with the difference that here the digits are weighted by some weights. So for example in this concept also the alternated sum-of-digits function is included. In... -
Slant Riemannian maps from almost Hermitian manifolds
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bayram Ṣahin --- Department of Mathematics, TurkeyAs a generalization of holomorphic submersions, anti-invariant submersions and slant submersions, we introduce slant Riemannian maps from almost Hermitian manifolds to Riemannian manifolds. We give examples, obtain the existence conditions of slant Riemannian maps and investigate harmonicity of such maps... -
Bounded proximities and related nearness
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Dieter Leseberg --- Department of Mathematics and Informatics, GermanyThe new created concept Bounded Topology, a convenient foundation for topology, (see [9]) deals with a lot kind of structures examined by topologists in the past: Especially, generalized convergence spaces, now defined as b-convergences in [8], appear in a new... -
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... -
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... -
Wits University's response to HIV/AIDS: flagship programme or 'tramp steamer'?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Murray Cairns David Dickinson Wendy OrrHIV/AIDS is a threat to the creation of human capital and development prospects in southern Africa and South Africa. The University of the Witwatersrand (Wits) is a well-regarded institution of higher education in Johannesburg. This paper outlines the university's qualified... -
Workplace ART programmes: Why do companies invest in them and are they working?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Gavin GeorgePrevalence data indicates that certain sectors within the private sector are particularly affected by HIV/AIDS. Companies in southern Africa began implementing treatment programmes in early 2002 as the corporate sector came to realise the financial imperative of offsetting employee morbidity... -
Perceptions of the benefits and affordability of antiretrovirals among HIV-positive persons in a rural area of South-West Nigeria
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: PaulS Ogunro AdeniyiK Adeneye TitusO Ogungbamigbe TaiwoA Adewole AdesolaZ Musa JoyI IsikweiTo assess the affordability of antiretroviral drugs (ARVs) and accessibility to treatment for opportunistic infections (OIs) among HIV-1 seropositive persons, we used semi-structured interviewer-administered questionnaires to interview 154 individuals seeking ARV treatment at the Daughter of Charity German Leprosy and... -
The future of AIDS in Africa: lessons from two scenario projects
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Pieter FourieScenario planning or futures studies have their origin in military planning, but have also been used with great success in the private sector, most notably in the energy industry. UNAIDS and the South African financial services group Metropolitan each recently... -
Evidence of AIDS mortality from an alternative source: A Swaziland case study
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Alan Whiteside --- Health Economics and HIV/AIDS Research Division, South Africa Chris Desmond --- Health Economics and HIV/AIDS Research Division, South Africa John King --- , Swaziland Jane Tomlinson --- , Swaziland Conway Sithungo --- , SwazilandThis paper explores a way of measuring AIDS mortality in the absence of vital registration. It looks at the death notices in the major daily newspaper in Swaziland, The Times of Swaziland, and asks if these can be analysed to... -
The significance of gathering wild orchid tubers for orphan household livelihoods in a context of HIV/AIDS in Tanzania
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: JoyceFX Challe --- Department of Research and Training, Mikocheni Agricultural Institute, Tanzania Anke Niehof --- Sociology of Consumers and Households Group, The Netherlands PaulC Struik --- Centre for Crop System Analysis, The NetherlandsWe investigated the role of gathering and selling the edible tubers of wild orchids by children orphaned by AIDS as one of their livelihood strategies, through a household survey administered to 152 households in three villages in the Southern Highlands... -
The new female condom (FC2) in Uganda: perceptions and experiences of users and their sexual partners
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: RhodaK Wanyenze --- , Uganda Lynn Atuyambe --- , Uganda Vista Kibirige --- , Uganda Sarah Mbabazi --- , Uganda NazariusM Tumwesigye --- , Uganda Kara Djurhuus --- , Uganda Alice Namale --- , UgandaThe new version of the female condom (FC2) was introduced in Uganda in October 2009, following an unsuccessful female condom programme begun in 1998. The failure of the earlier programme was partly attributed to low acceptance of the first type... -
HIV prevention in the world of work in sub-Saharan Africa: research and practice*
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Gavin George --- Health Economics and HIV and AIDS Research Division (HEARD), South Africa Courtenay Sprague --- Graduate School of Business Administration, South Africa -
Factors associated with HIV infection among sexually experienced adolescents in Africa: a pooled data analysis
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Stella Babalola --- Johns Hopkins Bloomberg School of Public Health, United StatesThe article examines the factors associated with HIV status among adolescents aged 15–19 years in 13 African countries: Côte d'Ivoire, Democratic Republic of Congo, Guinea, Kenya, Liberia, Mali, Malawi, Rwanda, Sierra Leone, Swaziland, Tanzania, Zambia and Zimbabwe. The data were... -
Obstacles to creating an environment conducive to HIV prevention for young people
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Roselyn Nm Kareithi --- Adolescent Health Research Unit, South Africa Crick Lund --- Department of Psychiatry and Mental Health, Centre for Public Mental Health, South AfricaThe external environment of an organisation influences the desired goals and interventions of that organisation in many ways. However, strategies for influencing the external context to create a more enabling environment for the interventions of non-governmental organisations (NGOs) are often... -
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... -
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... -
Preliminary study on the food web structure of two contrasting estuaries along the Eastern Cape coast, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW FronemanWater column profiles, surface macronutrient concentrations, size fractionated primary production and grazing by protozooplankton were investigated at 8 stations in the Kariega and Great Fish River estuaries in autumn (May) 1999. As a result of the low freshwater influx, the... -
Flagships and fragments — perspectives on the conservation of freshwater fishes in southern Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PH SkeltonFishes are relatively conspicuous inhabitants of freshwaters and therefore provide a useful means to monitor and relate aquatic conservation problems to the public. Human attitudes to the conservation of fishes and freshwaters have changed radically over the past 100 years... -
The zooplankton community of Lake Kariba in 1962/63 following impoundment of the Zambezi River
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Harding NA RaynerLake Kariba, bordered by Zambia in the north and Zimbabwe in the south, was formed following the impoundment of the the Zambezi River in 1955. Pre- and post-impoundment studies, which were undertaken on Lake Kariba by the Joint Fisheries Research... -
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... -
Stable isotope (∂13C) composition of the food web of the temperate Kariega estuary (Eastern Cape)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW FronemanStable isotope (∂13C) composition of the food web in the temperate Kariega estuary in summer and winter was analysed to determine the trophic relationships between 19 taxa. There was no seasonality in the stable isotope ratios of the dominant producers... -
An analysis of plant species distributions on the floodplain of the Okavango River, Namibia, with respect to impacts of possible water abstraction
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NJ Diederichs WN ElleryThe proposed abstraction of water from the Okavango River in Namibia could potentially result in significant changes in the vegetation of floodplains downstream of the abstraction point. Direct gradient analysis was used to determine the distribution of the most common... -
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... -
Land use and cover changes in the Likangala catchment of the Lake Chilwa basin, Malawi: implications for managing a tropical wetland
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DM Jamu JB Chimphamba RE BrummettThis study analyses land use and cover changes in the Likangala River catchment of Lake Chilwa, Malawi, an endorheic tropical African lake. It also examines how land use-related physico-chemical and hydrological parameters in two affluent rivers of the lake affect... -
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... -
Hydraulic loading, stability and water quality of Nakivubo wetland, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: J Kyambadde F Kansiime L Gumaelius G DalhammarNakivubo wetland, which has performed tertiary water treatment for Kampala city for the past 40 years, is ecologically stressed by agricultural and infrastructural developments. Field studies were carried out to assess the hydraulic loading, pollution profile, stability and water quality... -
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... -
Zooplankton community changes in Nhlabane estuary, South Africa, induced by man-made structures and drought
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HL JerlingThe Nhlabane estuary and coastal lake system has suffered a number of man-made impacts since 1977, when the lake and estuary were separated by the construction of a barrage. More recent man-made events included the construction of temporary sand walls,... -
Growth, reproduction and population structure of Diplotaxodon limnothrissa in the southeast arm of Lake Malawi
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GeoffreyZ Kanyerere OlafLF Weyl AnthonyJ BoothDiplotaxodon limnothrissa is a widely distributed species occurring throughout Lake Malawi from the surface to a depth of at least 220m. It is probably the most abundant cichlid in the lake, with biomass estimates of around 87 000t in the... -
Effects of three agricultural by-products on cage culture growth performances of a landlocked population of Sarotherodon melanotheron (Teleostei: Cichlidae) in man-made Lake Ayame, Côte d'Ivoire
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NI Ouattara V N'Douba GG Teugels JC PhilippartIn man-made Lake Ayame, a 180-day cage culture feeding trial was conducted to investigate the effects of three agricultural by-products — chicken droppings, wheat bran and corn bran — on the survival rates, mean daily weight gain and feed conversion... -
The effect of some environmental factors on zooplankton community biodiversity in Lake Qarun, Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Adel AliA MageedThe zooplankton of Lake Qarun was studied January–December 2003. A total of 26 species was recorded, amongst which protozoa, primarily ciliophora, were most abundant (79% of the species total), followed by rotifera (13%) and copepoda (8%). The average density ranged... -
Preliminary testing of the Integrated Habitat Assessment System (IHAS) for aquatic macroinvertebrates
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DeanJ Ollis Charles Boucher HelenF Dallas KarenJ EslerPreliminary testing of the Integrated Habitat Assessment System (IHAS), a widely-used aquatic macroinvertebrate habitat assessment method in South Africa, was undertaken. Based on the sensitivity of the South African Scoring System (SASS) to biotope availability and assuming that SASS Scores... -
Towards the development of a macroinvertebrate sampling technique for palustrine wetlands in South Africa: a pilot investigation in the KwaZuluNatal midlands
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Rebecca Bowd DonovanC Kotze CraigD Morris NevilW QuinnA study was undertaken in November 2003 to derive a suitable sampling technique for collecting a representative sample of aquatic macroinvertebrates from a selected emergent vegetation biotope in a palustrine wetland, Melmoth Vlei, KwaZulu-Natal, South Africa. The aim was to... -
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... -
Testing the applicability of the SASS5 scoring procedure for assessing wetland health: a case study in the KwaZulu-Natal midlands, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Rebecca Bowd DonovanC Kotze CraigD Morris NevilW QuinnA study was undertaken between 29th January and 17th February 2004 to test the applicability of the South African Scoring System Version 5 (SASS5) scoring and calculation procedure in nutrient-enriched palustrine wetlands in the midlands of KwaZulu-Natal, South Africa. Four... -
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... -
The sublethal effects of copper and lead on the haematology and acid-base balance of the groovy mullet, Liza dumerili
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HM Mzimela --- Coastal Research Unit of Zululand, Department of Zoology, South Africa V Wepener --- Coastal Research Unit of Zululand, Department of Zoology, South Africa DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaToxicity bioassays were conducted on groovy mullet, Liza dumerili, using copper and lead, in order to assess how these metals affected their blood haematology and acid-base balance. Short-term (96 hours) exposure to lead caused significantly more haematological response [PCO2] than... -
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... -
Seasonal changes in selected physico-chemical and biological variables in the temporarily open/closed Kasouga estuary, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW Froneman --- Coastal Research Unit, Department of Zoology and Entomology, South AfricaSeasonal changes in selected physico-chemical (temperature, salinity and turbidity) and biological (chlorophyll-a (chl-a), microphytobenthos and microheterotrophs) variables were measured at 7–9 day intervals for a period of 14 months in the temporarily open/closed Kasouga estuary. In addition, zooplankton biomass was... -
The distribution and relative abundance of stream fishes in the upper Manyame River, Zimbabwe, in relation to land use, pollution and exotic predators
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B Gratwicke --- Department of Biological Sciences, Zimbabwe BE Marshall --- Department of Biological Sciences, Zimbabwe T Nhiwatiwa --- Department of Biological Sciences, ZimbabweA survey of the upper Manyame River catchment, middle Zambezi system, Zimbabwe, yielded a total of 22 fish species from 48 stations. The most widespread species (present at >20 stations) were Marcusenius macrolepidotus, Barbus paludinosus, Labeo cylindricus, Clarias gariepinus and... -
Predation impact of juvenile Gilchristella aestuaria (Clupeidae) and Atherina breviceps (Atherinidae) on the zooplankton in the temperate Kariega estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW Froneman --- Coastal Research Group, Department of Zoology and Entomology, South Africa P Vorwerk --- , South AfricaSeasonal changes in the predation impact of juvenile (SL 18–25mm) Atherina breviceps and Gilchristella aestuaria on zooplankton was investigated at three stations in the middle reaches of the permanently open Kariega estuary during 1999 and 2000. Daily rations were estimated... -
River and wetland classifications for freshwater conservation planning in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- Ezemvelo KZN Wildlife, South Africa PS Goodman --- Ezemvelo KZN Wildlife, South AfricaTo provide the foundation for a freshwater conservation plan for KwaZulu-Natal, three-level hierarchical river and wetland type classifications, based on spatio-temporal scaling relationships, are proposed. This resolution of classification is appropriate for regional- or provincial-scale conservation planning. The hierarchical structure... -
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... -
Initial characterisation of the mesozooplankton community of the Mfolozi– Msunduzi estuarine system, KwaZulu-Natal, South Africa, during a low-flow period
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HL Jerling --- Coastal Research Unit of Zululand, Department of Zoology, South Africa L Vivier --- Coastal Research Unit of Zululand, Department of Zoology, South Africa DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South Africa RK Owen --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaThe mesozooplankton of the Mfolozi and Msunduzi estuaries, which share a combined mouth, was sampled twice per year during a two-year period of relatively low river flow. Samples were collected during March, after the rainy season when the estuary mouth... -
Characterisation of the mesozooplankton community in response to contrasting estuarine salinity gradients in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TH Wooldridge --- Department of Zoology, South AfricaStructure and pattern of mesozooplankton in three tidal estuaries experiencing contrasting salinity gradients were investigated. In the Kariega Estuary, where freshwater inflow was persistently low with little variation in flow, salinity values exceeded 28–30 for long periods (years) throughout the... -
Ecological status and role of the Mfolozi–Msunduzi estuarine system within the iSimangaliso Wetland Park, a World Heritage Site on the south-east coast of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South Africa L Vivier --- Coastal Research Unit of Zululand, Department of Zoology, South Africa RK Owen --- Coastal Research Unit of Zululand, Department of Zoology, South Africa HL Jerling --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaThe original structure and functioning of the historical Mfolozi–St Lucia estuarine system are described and anthropogenic impacts, which resulted in the Mfolozi and Msunduzi rivers being separated from the St Lucia Estuary and having their own combined mouth to the... -
Human impacts on hydrological health and the provision of ecosystemservices: a case study of the eMthonjeni–Fairview Spring Wetland, Grahamstown, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Sinchembe --- Department of Environmental Science, South Africa WN Ellery --- Department of Environmental Science, South AfricaWetland hydrological health and the provision of indirect ecosystem services in the eMthonjeni–Fairview Spring Wetland, Grahamstown, South Africa, were assessed in 2008, using the newly developed wetland assessment tools WET-Health and WET-EcoServices. Variation in health and ecosystem services were assessed... -
Distribution, abundance and diversity of macrozoobenthos in Aiba Reservoir, Iwo, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OE Atobatele --- Department of Biological Sciences, Nigeria OA Ugwumba --- Department of Zoology, NigeriaSpatial and seasonal variation in macrozoobenthic composition, abundance and diversity in Aiba Reservoir were investigated bimonthy between June 2004 and April 2005 using a van Veen grab. A depauperate fauna of nine taxa was recorded. Generally, larger numbers of taxa... -
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... -
The effect of physico-chemical parameters on speciation of trace metals insediments from inland and coastal waters of Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CA Biney --- , Burkina Faso R Asmah --- , GhanaThe speciation of cadmium, lead, copper, zinc, manganese and iron into exchangeable, carbonate, reducible and organic bound fractions was studied in sediments from coastal and freshwater environments in Ghana. This was relevant as the species in which metals are stored... -
The influence of biotope and sampling method on the assessment of the invertebrate community structure in endorheic reed pans in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AR de Klerk --- Centre for Aquatic Research, Department of Zoology, South Africa V Wepener --- Centre for Aquatic Research, Department of Zoology, South AfricaReed pans in the Mpumalanga Lakes District, South Africa, support an abundant diversity and richness of aquatic macroinvertebrates in a variety of different biotopes which, in the case of depressional wetlands such as reed pans, are not well studied. This... -
A vegetation-based hierarchical classification for seasonally pulsed floodplains in the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Murray-Hudson --- , Botswana F Combs --- , Botswana P Wolski --- , Botswana MT Brown --- , USAA classification scheme is presented for seasonal floodplains of the Boro-Xudum distributary of the Okavango Delta, Botswana. This distributary is subject to an annual flood-pulse, the inundated area varying from a mean low of 3 600 km2 to a mean... -
Assessment of heavy metal accumulation in Anzali wetland, Iran, using a submerged aquatic plant, Ceratophyllum demersum
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AR Pourkhabbaz --- Department of Environmental Sciences, Faculty of Agriculture, Iran HR Pourkhabbaz --- Department of Environment, Faculty of Natural Resources, Iran T Khazaei --- Department of Environmental Sciences, Faculty of Agriculture, Iran S Behravesh --- Department of Environmental Sciences, Faculty of Agriculture, Iran M Ebrahimpour --- Department of Environmental Sciences, Faculty of Agriculture, IranThe objective of this study in 2009 was to examine whether levels of cadmium (Cd), copper (Cu), zinc (Zn), lead (Pb) and chromium (Cr) were higher in the leaves than in the stems of a submerged aquatic plant Ceratophyllum demersum... -
Spatial and temporal variations in densities of small fishes across different temporary floodplain types of the lower Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Siziba --- , Botswana MJ Chimbari --- , Botswana K Mosepele --- , Botswana H Masundire --- Department of Biological Sciences, BotswanaSmall-sized and juvenile fishes as well as physicochemical water parameters in various primary, secondary and rarely flooded temporary floodplains of the Okavango Delta were assessed during the different hydrological phases of the 2009–2010 flooding season. Small fishes were sampled in... -
Heavy metal concentrations in the water of the Nyl River system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Greenfield --- Department of Zoology, South Africa JHJ van Vuren --- Department of Zoology, South Africa V Wepener --- Department of Zoology, South AfricaThe Nyl River floodplain, a Ramsar site that provides habitat for a number of endangered species, is one of the jewels in the arid Limpopo province and thus its conservation and protection are vitally important. Very little work has been... -
Toxicity of four pharmaceuticals from different classes to isolated plankton species
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RA El-Bassat --- Faculty of Applied Science, Biology Department, Saudi Arabia HE Touliabah --- Biology Department, Saudi Arabia GI Harisa --- Department of Pharmaceutics, Saudi ArabiaFour drugs, erythromycin, fluoxetine, naproxen and gemfibrozil, belonging to different therapeutic classes, were chosen to examine their toxicity to selected plankton organisms from different trophic levels: algae (Chlorella vulgaris and Ankestrodesmus falcatus), protozoa (Paramecium caudatum), rotifera (Brachionus calyciflorus) and cladocera... -
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... -
Diet of the demersal feeding Leiognathus equula in the Mfolozi–Msunduzi estuarine system, South Africa, in response to an impoverished macrobenthic invertebrate community
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JBB Nhleko --- Coastal Research Unit of Zululand, Department of Zoology, South Africa DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South Africa L Vivier --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaLeiognathus equula, a species generally regarded as a zoobenthic feeder, was the most abundant fish species sampled in the Mfolozi–Msunduzi estuarine system in 2008–2010, despite the zoobenthos in this system being impoverished. Four dietary assessment methods all confirmed that its... -
Impact of marine influence and cultivation on the diatom flora of Thiaroye Pond, Dakar, Senegal
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EH Sow --- Department of Geology, Senegal CAK Fofana --- Department of Geology, Senegal C Aw --- Department of Geology, Senegal PM Ndiaye --- Department of Geology, SenegalDuring a limnological and palaeolimnological study of the western part of the Great Coast of Senegal, an analysis of diatoms was carried out in Thiaroye Pond in the suburbs of Dakar. Current diatom flora in the water and on floating... -
Optimum rabbit density over fish ponds to optimise Nile tilapia production in an integrated rabbit–fish system in Rwanda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Rukera Tabaro --- School of Environmental Science, South Africa O Mutanga --- School of Environmental Science, South Africa D Rugege --- School of Environmental Science, South Africa JC Micha --- Research Unit in Environmental Biology, Department of Biology, BelgiumAlthough previous studies have suggested that rabbit excreta can be used as high-quality manure for sustaining plankton production due to their gradual nutrient release, integrated rabbit–fish production systems are still not widely used. Between 2006 and 2010 optimal rabbit densities... -
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... -
Fungi associated with Eichhornia crassipes in South Africa and their pathogenicity under controlled conditions
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: P Ray --- Department of Zoology and Entomology, South Africa MP Hill --- Department of Zoology and Entomology, South AfricaEichhornia crassipes Mart. Solms-Laubach (Pontederiaceae), water hyacinth, continues to be the world's worst aquatic weed. In South Africa, considerable research has been conducted on biological control agents associated with water hyacinth, with the release of six arthropods and one fungus,... -
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... -
Fish distributions in the Rondegat River, Cape Floristic Region, South Africa, and the immediate impact of rotenone treatment in an invaded reach
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OLF Weyl --- , South Africa BR Ellender --- Department of Ichthyology and Fisheries Science, South Africa DJ Woodford --- , South Africa MS Jordaan --- , South AfricaAlien fishes are considered the most serious threat to native headwater stream fishes in South Africa. A 4 km reach of the Rondegat River is the first section of a South African river to be rehabilitated through the attempted removal... -
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... -
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... -
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... -
The effects of fire on wetland structure and functioning
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DC Kotze --- School of Agriculture, Earth and Environmental Sciences, South AfricaFire is an extensively used wetland management tool in both tropical and temperate areas, but its effects on wetlands are not well understood. The purpose of this paper is to review the effects of fire on wetland hydrology, biogeochemical cycling... -
Effects of crop diversity on bird species richness and abundance in a highland East African agricultural landscape
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: P Kariuki Ndang'ang'a --- , Kenya JohnBM Njoroge --- , Kenya Kamau Ngamau --- , Kenya Wariara Kariuki --- , Kenya PhilipW Atkinson --- British Trust for Ornithology, UK Juliet Vickery --- The Royal Society for the Protection of Birds, UKWe examined the effects of crop diversity on avian species richness and abundance in the highland farmlands of Nyandarua, Kenya. We surveyed birds using point counts and recorded habitat data at the same locations estimating cover and growth stage of... -
Longevity of the Seychelles Fody Foudia sechellarum
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: H Dieter Oschadleus --- Animal Demography Unit, Department of Zoology, South Africa Riaz Aumeeruddy --- Nature Seychelles, Seychelles SjoukeA Kingma --- School of Biological Sciences, UKThe Seychelles Fody Foudia sechellarum, which occurs on six islands in the Seychelles, has been well ringed over several decades in order to obtain population estimates for the species, and morphological descriptions and measurements. Annual survival estimates for the species... -
Territory size and habitat selection of Cinnamon-breasted Rock Bunting Emberiza tahapisi in Nigeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: FidelisA Atuo --- AP Leventis Ornithological Research Institute, Nigeria ShiiwuaA Manu --- AP Leventis Ornithological Research Institute, NigeriaMost of our understanding of territorial behaviour in birds comes from studies of temperate species. Territoriality and factors influencing territory size of tropical birds are still poorly studied. In this study, 11 territories of the Cinnamon-breasted Rock Bunting Emberiza tahapisi... -
Diet of Black-shouldered Kite Elanus caeruleus in a farmland area near Algiers, Algeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abdessalam Manaa --- Laboratory of Ornithology, Department of Zoology, Algeria Karim Souttou --- Laboratory of Ornithology, Department of Zoology, Algeria Makhlouf Sekour --- Laboratory of Ornithology, Department of Zoology, Algeria Djamel Bendjoudi --- Department of Biology, Faculty of Agro-Veterinary and Biology, Algeria Omar Guezoul --- Laboratory of Ornithology, Department of Zoology, Algeria Fadila Baziz-Neffah --- Laboratory of Ornithology, Department of Zoology, Algeria Salaheddine Doumandji --- Laboratory of Ornithology, Department of Zoology, Algeria Emmanuelle Stoetzel --- UMR CNRS 7194 – Department of Prehistory, France Christiane Denys --- UMR CNR S5202 – USM601 – CP51 – Mammals and Birds, Department of Systematics and Evolution, FranceThe diet of the Black-shouldered Kite Elanus caeruleus was analysed in a recently colonised area in Meftah, south-eastern Algiers, Algeria. The diet was determined by analysing 144 pellets. Our data showed that the diet was dominated by rodents with Algerian... -
Status and breeding ecology of the Common Moorhen Gallinula chloropus in Algeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Farrah Samraoui --- Laboratoire de Recherche et de Conservation des Zones Humides, Algeria AhmedH Alfarhan --- Center of Excellence for Research in Biodiversity, Saudi Arabia Boudjéma Samraoui --- Laboratoire de Recherche et de Conservation des Zones Humides, AlgeriaThe status of the Common Moorhen Gallinula chloropus in Algeria and its breeding ecology in North Africa are reported for the first time. Nest site selection and breeding parameters were studied at two contrasting sites in north-east Algeria: Boussedra, an... -
Vegetation composition and structure influences bird species community assemblages in the highland agricultural landscape of Nyandarua, Kenya
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: P Kariuki Ndang'ang'a --- BirdLife International – Africa Partnership Secretariat, Kenya John BM Njoroge --- Jomo Kenyatta University of Agriculture and Technology, Kenya Mwangi Githiru --- Ornithology Section, KenyaWe examined the effects of vegetation composition and structure on bird species diversity and richness of foraging guilds in the highland agricultural landscape of Nyandarua, Kenya. Bird point counts and vegetation surveys were undertaken during four sampling periods. Linear mixed... -
Treatment Effects on Annual and Dry Period Streamflow at Cathedral Peak
Item type: Journal Article • Journal: South African Forestry Journal • Authors: J.M. Bosch --- Department of Forestry,Total annual streamflow and dry season flows of treated catchments at Cathedral Peak, Natal, were compared and related to those of index catchments. -
An Integrated System for Forest Management and Silvicultural Planning and Control in South African State Forestry
Item type: Journal Article • Journal: South African Forestry Journal • Authors: H.W. Kassier --- Forest Management Division, Department of Water Affairs, Forestry and Environmental Conservation,A computerised plantation analysis system (COMPAS) for commercial plantation management, planning and control is described and illustrated. Present uses in South African State forestry and future development of the system are discussed. -
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... -
Litter Fall and Decomposition in Stands of Mature Pinus radiata
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.B. Versfeld --- Department of Water Affairs, Forestry and Environmental Conservation,Rates of litter fall in mature stands of Pinus radiata D. Don have been monitored at the Jonkershoek Forestry Research Station since 1976. Decomposition trials were laid out in June 1977. Litter fall has been collected on six sites in... -
Overland Flow on Small Plots at the Jonkershoek Forestry Research Station
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.B. Versfeld --- Department of Environment Affairs,Overland flow was found to be negligible on small plots at Jonkershoek in the Western Cape. Treatments such as the burning or hoeing of fynbos and the thinning of a plantation had no significant effect on this phenomenon and the... -
Railway Plantations and Railway Sleepers in South Africa, 1910–1937
Item type: Journal Article • Journal: South African Forestry Journal • Authors: G.H. Pirie --- Department of Geography and Environmental Studies,Plantations owned by the South African Railways in the period 1910–1937 were not an important source of timber for railway sleepers. The plantations yielded wood for other railway uses as well as for use in the mines and in box... -
Rectangular Espacement Does Not Cause Stem Ellipticity in Eucalyptus grandis
Item type: Journal Article • Journal: South African Forestry Journal • Authors: Brian Bredenkamp --- Natal Forestry Research Centre, Department of Environment Affairs,Eucalyptus grandis grown with varying degrees of rectangularity of growing space showed that stem ellipticity could not be attributed to proximity of nearest neighbours. Stem ellipticity was markedly orientated along wind directions prevailing in the Eastern Transvaal. Extreme rectangularity of... -
Early Respacement and Fewer Thinnings can Increase Profitability of Coniferous Sawtimber Production
Item type: Journal Article • Journal: South African Forestry Journal • Authors: B.V. Bredenkamp --- Natal Forestry Research Centre, J. S.J. Venter --- , H. Haigh --- Natal Forestry Research Centre,A pine sawtimber production regime using wider initial spacing, early respacement, fewer thinning operations and a shortened rotation is proposed. The proposal is compared with a commonly accepted regime for ranges of interest rates and pulpwood prices. Benefits are lowered... -
7. Problems in Using Vegetation or Soil Classification in Determining Site Quality
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- , South AfricaThis paper discusses the concepts of site and site quality and reviews briefly the determination of the latter. Site quality is viewed primarily as productive capacity of forest land, although other aspects are considered also. It is concluded that nowadays... -
Factors Affecting the Timing of Grassland Regrowth after Fire in the Montane Grasslands of Natal
Item type: Journal Article • Journal: South African Forestry Journal • Authors: C.S. Everson --- , South Africa TheresaM. Everson --- , South AfricaRecent research has indicated that burning Highland Sourveld once growth has been initiated increases grass tiller mortality. Present burning prescriptions could therefore be improved by an insight into the factors controlling the initiation of grass growth in spring. It was... -
Curing Rates in the Grass Sward of the Highland Sourveld in the Natal Drakensberg
Item type: Journal Article • Journal: South African Forestry Journal • Authors: TheresaM. Everson --- , C.S. Everson --- , H.M. Dicks --- , A.G. Poulter --- ,Data on the curing rates of one, two and three-year-old grassland are presented. Curing is initiated at the end of April and progresses rapidly up to the middle of May. By June the grasses are 95 % cured, increasing the... -
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... -
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... -
A SYSTEM DYNAMICS MODEL OF PART OF THE PONGOLO RIVER FLOODPLAIN: DEVELOPMENT AND WATER MANAGEMENT POLICY ANALYSIS
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: A.K. Drewes --- ,The issue of allowing the timing, duration and magnitude of a flood release to be determined by man has led to a wide spectrum of viewpoints as to which values of these parameters are most suitable for the Pongolo River... -
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... -
Population Dynamics and Spawning of the Flatfish Solea Bleekeri and Pseudorhombus Arsius in the Intertidal Area of Inhaca Island, Moçambique
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A. M. P. Van Schie W. F. De BoerThe population dynamics of flatfish Solea bleekeri and Pseudorhombus arsius within the intertidal area of Inhaca Island, Moçambique, was investigated using bottom trawl data collected during summer (December 1996 – March 1997) and winter (June 1997 – August 1997). The... -
The Zooplankton Community of the Mhlathuze (Richards Bay) Estuary: Two Decades After Construction of the Harbour
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H. L. JerlingThe Mhlathuze (Richards Bay) Estuary on the KwaZulu-Natal coast, South Africa, was substantially altered during the early 1970s, when it was divided into two separate systems. The northern section was developed into a deep-water harbour, whereas the southern part was... -
Aquarium Experiments Comparing the Feeding Behaviour of Rock Lobster Jasus Lalandii on Abalone and Sea Urchins at Two Sites on the West Coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. F. Van Zyl S. Mayfield G. M. BranchPredation by the rock lobster Jasus lalandii is influential in regulating the composition of shallow-reef communities on the west coast of South Africa. Two previous and independent studies addressing this topic, but conducted 600 km apart (one in Cape Town... -
First Breeding Records of Kelp Gulls Larus Dominicanus Vetula at Robben Island, Western Cape, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K. M. Calf J. Cooper L. G. UnderhillThe first recorded breeding of kelp gulls Larus dominicanus vetula on Robben Island, Western Cape, South Africa, took place in 2000, when five nests were recorded. In 2001, there were 15 nests and 29 fledglings. The initiation of breeding by... -
Conserving Surface-nesting Seabirds at the Prince Edward Islands: The Roles of Research, Monitoring and Legislation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford J. CooperSouth Africa's subantarctic Prince Edward Islands support substantial proportions of the global populations of a number of surface-nesting seabirds. Populations of most of these have decreased at the islands since the 1980s and 12 of 16 species are regarded as... -
Populations of Surface-nesting Seabirds 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 M. D. Greyling N. T. W. Klages P. G. Ryan S. L. Petersen L. G. Underhill L. Upfold W. Wilkinson M. S. De Villiers S. Du Plessis M. Du Toit T. M. Leshoro A. B. Makhado M. S. Mason D. Merkle D. Tshingana V. L. Ward P. A. WhittingtonDuring the 1990s and early 2000s, populations of surface-nesting seabirds at Marion Island showed different trends, but for the majority of species numbers decreased. Reduced numbers of gentoo penguins Pygoscelis papua, eastern rockhopper penguins Eudyptes chrysocome filholi, Crozet shags Phalacrocorax... -
Counts of Surface-nesting Seabirds Breeding at Prince Edward Island, Summer 2001/02
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P. G. Ryan J. Cooper B. M. Dyer L. G. Underhill R. J. M. Crawford M. N. BesterThe first midsummer survey of surface-nesting seabirds at Prince Edward Island was conducted during December 2001. It was also the first census for most species since the early 1980s. Despite concerns about the impacts of longline fishing mortality on various... -
Unusual Breeding by Seabirds at Marion Island During 1997/98
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford C. M. Duncombe Rae D. C. Nel J. CooperIn 1997/98, breeding at subantarctic Marion Island was exceptionally good for five species of seabirds capable of foraging over wide areas and for a tern. The number of king penguin Aptenodytes patagonicus chicks surviving to the start of spring in... -
Population and Breeding of the Gentoo Penguin Pygoscelis Papua at Marion Island, 1994/95 – 2002/03
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford J. Cooper M. Du Toit M. D. Greyling B. Hanise C. L. Holness D. G. Keith J. L. Nel S. L. Petersen K. Spencer D. Tshingana A. C. WolfaardtThe numbers of gentoo penguins Pygoscelis papua breeding at subantarctic Marion Island fell by 40% from 1994/95 to 2002/03, from 1 352 pairs to 806 pairs. Apart from a slight increase in 1998/99, there was a steady decrease in numbers... -
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... -
Decrease in Numbers of the Eastern Rockhopper Penguin Eudyptes Chrysocome Filholi 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 M. D. Greyling N. T. W. Klages D. C. Nel J. L. Nel S. L. Petersen A. C. WolfaardtThe number of eastern rockhopper penguins Eudyptes chrysocome filholi breeding at subantarctic Marion Island decreased from about 173 000 pairs in 1994/95 to about 67 000 pairs in 2001/02. During 1994/95 – 2002/03 pairs fledged on average 0.40 chicks per... -
Absence of Haematozoa in Breeding Macaroni Eudyptes Chrysolophus and Rockhopper E. Chrysocome Penguins at Marion Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A. Schultz S. L. PetersenHaematozoan infections cause the death of penguins in captivity, but seldom in the wild. No haematozoa were found in 89 blood smears taken from macaroni penguins Eudyptes chrysolophus or 80 smears from eastern rockhopper penguins E. chrysocome filholi at subantarctic... -
Population Dynamics of the Wandering Albatross Diomedea Exulans at Marion Island: Longline Fishing and Environmental Influences
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D. C. Nel F. Taylor P. G. Ryan J. CooperThe subantarctic Prince Edward Islands (Marion and Prince Edward) support the largest breeding population of the Vulnerable wandering albatross Diomedea exulans. The number of birds breeding at Marion Island has fluctuated over the past three decades apparently as a result... -
Exchange of the Wandering Albatross Diomedea Exulans Between the Prince Edward and Crozet Islands: Implications for Conservation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J. Cooper H. WeimerskirchExchange of 61 wandering albatrosses Diomedea exulans has been recorded between the French Crozet Islands and the South African Prince Edward Islands, 1 068 km apart in the Southern Ocean. Most movements of banded birds (57) have been westwards, from... -
The Oldest Known Banded Wandering Albatross Diomedea Exulans at the Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J. Cooper H. Battam C. Loves P. J. Milburn L. E. SmithThe oldest known wandering albatross Diomedea exulans at the Prince Edward Islands is estimated to have been approximately half a century old when last recaptured in 2001. Demographic studies need to continue for several more decades before the true maximum... -
Nest Densities of the Wandering Albatross Diomedea Exulans at the Prince Edward Islands, Estimated Using Gps
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L. G. Underhill S. L. Petersen J. CooperHand-held Global Positioning System (GPS) receivers provide opportunities for detailed and rapid mapping of features, including biological ones, further enhanced by the removal during 2000 of "selective availability". GPS was used to map, describe and compare nest densities within wandering... -
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... -
The Distribution and Spread of Alien Vascular Plants on Prince Edward Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P. G. Ryan V. R. Smith N. J. M. GremmenSurveys of alien plants at subantarctic Prince Edward Island in 2001 show that the ranges of all three introduced species have increased since the last survey in 1998. Poa annua, the longest-established species, increased its range substantially after 1987, prior... -
Age structure or functional response? Reconciling the energetics of surplus production between single-species models and ECOSIM
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K. Y. AydinWhole-ecosystem foodweb models, specifically the dynamic model ECOSIM, contain specific hypotheses for surplus production that differ from traditional single-species management models. Specifically, ECOSIM begins with an assumption that all species are tightly connected and energetic surplus does not arise through... -
Historical commercial West Coast rock lobster Jasus lalandii landings in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Melville-Smith L van SittertHistoric data from 1891 to 2001 on the annual exports of rock lobster Jasus lalandii products (canned, frozen tails, raw whole frozen, cooked whole frozen and live) from the South African west coast are used to estimate the annual commercial... -
Seasonal and spatial variability of dominant copepods along a transect off Walvis Bay (23°S), Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: FC Hansen RR Cloete HM VerheyeThe study provides the first quantitative analysis of changes in zooplankton abundance and community structure in the Walvis Bay area, off Namibia, over a full seasonal cycle (February–December 2000). Zooplankton was collected monthly along a 90-nautical-mile transect. Calanoid copepods were... -
The West Coast rock lobster Jasus lalandii as a valuable source for chitin and astaxanthin
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Auerswald G GädeEstimates are made of the maximal amount of chitin and astaxanthin that can potentially be retrieved from material of the South African West Coast rock lobster Jasus lalandii. Three different sources were investigated: (a) industrial waste from lobster processing factories,... -
A symbiotic shell-encrusting bryozoan provides subtidal whelks with chemical defence against rock lobsters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CA Gray CD McQuaid MT Davies-ColemanThe subtidal whelk Burnupena papyracea co-occurs with a voracious predator, the rock lobster Jasus lalandii, in situations where other potential prey are largely eliminated. The survival of B. papyracea has been ascribed to a symbiotic bryozoan, Alcyonidium nodosum, which characteristically... -
Water-body preferences of dominant calanoid copepod species in the Angola-Benguela frontal zone
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Loick W Ekau HM VerheyeThe distribution of five dominant calanoid copepods was related to different water masses in the Angola-Benguela Front system. Five water bodies were identified by principal component analysis, on the basis of abiotic parameter such as temperature, salinity, dissolved oxygen, phosphate,... -
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... -
A demonstration of the hydrographic partition of the Benguela upwelling ecosystem at 26°40'S
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CM Duncombe RaeContinuous CTD data from a series of recent cruises show that the distribution of the water mass characteristics in the central Benguela region from the Orange River mouth (28°38'S) to alvis Bay (22°57'S) is discontinuous in the central and intermediate... -
Influence of oceanographic fronts and low oxygen on the distribution of ichthyoplankton in the Benguela and southern Angola currents
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: W Ekau HM VerheyeThe study focuses on ichthyoplankton populations in the southern Angola Current, the Angola-Benguela Front and the coastal upwelling area of the northern and central Benguela Current. The horizontal and vertical distributions of eggs and larvae of sardine Sardinops sagax, anchovy... -
Life strategies, energetics and growth characteristics of Calanoides carinatus (Copepoda) in the Angola-Benguela frontal region
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HM Verheye W Hagen H Auel W Ekau N Loick I Rheenen P Wencke S JonesRates of daily egg production, moulting and egg hatching success, as well as total lipid content and composition of Calanoides carinatus, were measured in the region of the southern Angola Curre nt SAC), the Angola-Benguela Front (ABF) and the coastal... -
Metabolic adaptations and reduced respiration of the copepod Calanoides carinatus during diapause at depth in the Angola-Benguela Front and northern Benguela upwelling regions
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H Auel W Hagen W Ekau HM VerheyeStage C5 copepodids and adult females of the herbivorous copepod Calanoides carinatus were sampled in the Angola-Benguela frontal region and northern Benguela upwelling area off Namibia in February–March 2002, using a multiple opening/closing net system. Respiration rates of C5s collected... -
The status of seabirds at Latham Island, Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford BS Asseid BM Dyer A Hija AA Mwinyi P Shinula L UpfoldLatham Island, Tanzania, was surveyed in August 2004 — the first known survey of the island outside the period October–March — and in December 2005. On both surveys, four species of seabird were breeding at the island. Larger numbers of... -
The food of three seabirds at Latham Island, Tanzania, with observations on foraging by masked boobies Sula dactylatra
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BS Asseid L Drapeau RJM Crawford BM Dyer A Hija AA Mwinyi P Shinula L UpfoldAt Latham Island, Tanzania, in August 2004 and December 2005, flying fish (Exocoetidae) contributed 90% by mass of prey items regurgitated by masked boobies Sula dactylatra. The fish had a mean caudal length of 164mm. Two boobies generally foraged in... -
Inter- and intra-specific variability in morphogenetics and toxin composition of Alexandrium spp. in Irish coastal waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Touzet JM Franco R RaineAlexandrium spp. usually occur in low densities during summer along the south and west coasts of Ireland. Field investigations revealed the presence of morphologically similar strains of A. tamarense, A. tamutum and A. minutum. Several strains were cultured, derived through... -
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... -
HAB Buoy: a new instrument for in situ monitoring and early warning of harmful algal bloom events
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PF Culverhouse R Williams B Simpson C Gallienne B Reguera M Cabrini S Fonda-Umani T Parisini FA Pellegrino Y Pazos H Wang L Escalera A Moroño M Hensey J Silke A Pellegrini D Thomas D James MA Longa S Kennedy G del PuntaA new microplankton imaging and analysis instrument, HAB Buoy, is described. It integrates a high-speed camera for in-flow image acquisition with automatic specimen labelling software, known as DiCANN (Dinoflagellate Categorisation by Artificial Neural Network). Some preliminary results are presented together... -
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... -
Vegetative growth of Noctiluca scintillans containing the endosymbiont Pedinomonas noctilucae
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Furuya H Saito R Sriwoon T Omura EE Furio VM Borja T LirdwitayaprasitVegetative growth of Noctiluca scintillans containing the photosynthetic endosymbiont Pedinomonas noctilucae was investigated in culture and in natural populations. Clonal cultures of N. scintillans containing the endosymbiont, isolated from the inner Gulf of Thailand and Manila Bay, were of two... -
Overgrazing of edible algae as a mechanism behind red tides and harmful algal blooms
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Johannessen E Dahl O LindahlIt has recently been suggested that there is a positive synergistic relationship between herbivorous zooplankton and their algal food, with herbivores stimulating the production of their preferred species while negatively affecting competing algal species. A prerequisite for this positive interaction... -
Brevetoxin — an elusive toxin in New Zealand waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P McNabb L Rhodes J Adamson P HollandLiquid chromatography mass spectrometry (LCMS) was used to test 34 microalgal isolates, all known or reported to be brevetoxin producers. Only Karenia brevis strains, imported from the USA, produced brevetoxin. In contrast, all isolates cultured in New Zealand proved non-toxic... -
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... -
Towards the declaration of a large marine protected area: a subtidal ichthyofaunal survey of the Pondoland coast in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann L Celliers ST Fennessy S Bailey AD WoodA subtidal marine ichthyofaunal survey was carried out on shallow reefs (1–30m deep) in the Pondoland region between the Mtamvuna River and Port St Johns in the Eastern Cape, South Africa. The purpose of this survey was to provide the... -
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%,... -
The 26 December 2004 Sumatra tsunami recorded on the coast of West Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Joseph JT Odametey EK Nkebi A Pereira RG Prabhudesai P Mehra AB Rabinovich V Kumar S Prabhu-Desai P WoodworthAnalysis of sea-level data obtained from the Atlantic Global Sea Level Observing System (GLOSS) sea-level station at Takoradi, Ghana, West Africa, clearly reveals a tsunami signal associated with the Mw = 9.3 Sumatra earthquake of 26 December 2004 in the... -
Birds and conservation significance of the Namib Desert's least known coastal wetlands: Baia and Ilha dos Tigres, Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RE Simmons A Sakko J Paterson A NzuziThe Ilha dos Tigres of Angola is the only sandy island off the coast of the 2 000km-long Namib Desert and it remains the least known coastal wetland on a desert coast rich in shorebirds. Two surveys of the Baia... -
Migration redefined? Seasonality, movements and group composition of humpback whales Megaptera novaeangliae off the west coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Barendse --- , South Africa PB Best --- , South Africa M Thornton --- , South Africa C Pomilla --- , USA I Carvalho --- , USA HC Rosenbaum --- , USAThe migration of Southern Hemisphere humpback whales Megaptera novaeangliae between their feeding and breeding areas has thus far been considered a highly predictable and seasonal event. However, previous observations on the humpbacks that pass through the nearshore waters of the... -
Coastal currents and temperatures along the eastern region of Algoa Bay, South Africa, with implications for transport and shelf–bay water exchange
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MJ Roberts --- Department of Environmental Affairs, South AfricaBoat ADCP surveys and an eight-month deployment of a 1 200 kHz ADCP were used to study the nearshore (5–25 m depth) current and temperature patterns along the eastern coastal region of Algoa Bay, on the south-east coast of South... -
The barnacles Chirona (Striatobalanus) amaryllis (Darwin 1854) and Megabalanus coccopoma (Darwin 1854) (Crustacea, Cirripedia): two invasive species new to tropical West African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Kerckhof --- Management Unit of the North Sea Mathematical Models, Belgium J Haelters --- Management Unit of the North Sea Mathematical Models, Belgium S Degraer --- Management Unit of the North Sea Mathematical Models, BelgiumThe collection of the barnacle Chirona (Striatobalanus) amaryllis (Darwin 1954) (Crustacea, Cirripedia) from the hull of a ship that had been operating for five months in the Gulf of Guinea and off Sierra Leone triggered a closer investigation of the... -
A 21-year ichthyoplankton collection confirms sardine spawning in KwaZulu-Natal waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AD Connell --- , South AfricaPelagic eggs of marine fish were collected weekly from shelf waters at Park Rynie on the KwaZulu-Natal south coast from 1987 to 2007 to investigate seasonal and annual patterns in the abundance of sardine Sardinops sagax eggs. After a sudden... -
Socio-economic aspects of boat-based ecotourism during the sardine run within the Pondoland Marine Protected Area, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Dicken --- Department of Development Studies, School of Economics, Development and Tourism, South AfricaUnderstanding recreational aspects of the tourism industry developing around the KwaZulu-Natal sardine run is important for the protection and sustainability of the Pondoland Marine Protected Area (MPA), on the south-east coast of South Africa. Between June and July 2007, a... -
Settlement patterns, size and growth of puerulus and juvenile rock lobster Jasus lalandii at an oyster farm in Saldanha Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JC Groeneveld --- , South Africa CL Greengrass --- Marine Biology Research Institute, Department of Zoology, South Africa DL van Zyl --- Branch Fisheries, Department of Agriculture, Forestry and Fisheries, South Africa GM Branch --- Marine Biology Research Institute, Department of Zoology, South AfricaTrends in the abundance, size and growth of newly settled pueruli and early juveniles of the rock lobster Jasus lalandii were determined from samples obtained from mesh bags used for oyster mariculture in Saldanha Bay, South Africa. Totals of 3... -
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... -
First documented southern transatlantic migration of a blue shark Prionace glauca tagged off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C da Silva --- Branch Fisheries, Department of Agriculture, Forestry and Fisheries, South Africa SE Kerwath --- Branch Fisheries, Department of Agriculture, Forestry and Fisheries, South Africa CG Wilke --- Branch Fisheries, Department of Agriculture, Forestry and Fisheries, South Africa M Meÿer --- Oceans and Coasts, Department of Environmental Affairs, South Africa SJ Lamberth --- Branch Fisheries, Department of Agriculture, Forestry and Fisheries, South AfricaThe first documented recapture of a South African-tagged juvenile blue shark Prionace glauca off Uruguay lends weight to the hypothesis of a single blue shark population in the South Atlantic. The presence of neonate blue sharks with umbilical scars and... -
Distribution and seasonality of cetaceans in tropical waters between Angola and the Gulf of Guinea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CR Weir --- , UKThe species richness, spatial distribution, seasonality and interspecific associations of cetaceans in tropical oceanic waters between the Gulf of Guinea and Angola were examined using 5 905.3 h of dedicated survey effort collected from 13 platforms of opportunity (geophysical vessels)... -
The waters of São Tomé: a calving ground for West African humpback whales?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Carvalho --- Faculdade de Ciências do Mar e Ambiente, Portugal C Brito --- Centro de História de Além-Mar, Faculdade de Ciências Sociais e Humanas, Portugal ME dos Santos --- Eco-Ethology Research Unit, ISPA, Portugal HC Rosenbaum --- Sackler Institute for Comparative Genomics, USAIn the Southern Hemisphere, humpback whales Megaptera novaeangliae feed in Antarctic waters during the austral summer and migrate to their breeding grounds in subtropical and tropical waters during the winter. Historical whaling records suggest that the Archipelago of São Tomé... -
The dispersion of red knots Calidris canutus in Africa—is southern Africa a buffer for West Africa?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RW Summers --- , UK LG Underhill --- Animal Demography Unit, Department of Zoology, South Africa M Waltner --- , UKThe Siberian subspecies of the red knot Calidris canutus canutus spends the non-breeding season largely in West Africa (Mauritania and Guinea Bissau), where approximately half a million occurred in the 1980s. It was a rarely seen in southern Africa in... -
Investigations into the diet and feeding ecology of the bearded goby Sufflogobius bibarbatus off Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RB Cedras --- Department of Biodiversity and Conservation Biology, South Africa A-GV Salvanes --- Department of Biology, Norway MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaThe bearded goby Sufflogobius bibarbatus has come to replace sardine Sardinops sagax in the diets of many top predators within the marine environment off Namibia, and it is playing a key role within the region's foodweb. Previously published information on... -
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... -
A robust method for generating separate catch time-series for each of the hake species caught in the Namibian trawl fishery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Johnsen --- , Norway J Kathena --- Ministry of Fisheries and Marine Resources, NamibiaMerluccius capensis and M. paradoxus are morphologically very similar and cannot be registered separately by species in the Namibian commercial hake catches. This prevents a biologically plausible single-species stock assessment from being carried out. Here, species-separated data from an observer... -
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... -
Assessing the ecosystem effects of the abalone Haliotis midae from its diet and foraging behaviour
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Z Zeeman --- Department of Zoology and Marine Research Institute, South Africa GM Branch --- Department of Zoology and Marine Research Institute, South Africa TP Peschak --- Department of Zoology and Marine Research Institute, South Africa D Pillay --- Department of Zoology and Marine Research Institute, South AfricaThe South African abalone Haliotis midae is commercially exploited and seriously threatened by overfishing. This not only affects the species itself but potentially the functioning of the ecosystem because of associated changes in community structure. The nature of effects that... -
Sea level changes at Ascension Island in the last half century
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PL Woodworth --- National Oceanography Centre, UK PR Foden --- National Oceanography Centre, UK DS Jones --- National Oceanography Centre, UK J Pugh --- National Oceanography Centre, UK SJ Holgate --- National Oceanography Centre, UK A Hibbert --- National Oceanography Centre, UK DL Blackman --- National Oceanography Centre, UK CR Bellingham --- National Oceanography Centre, UK VM Roussenov --- School of Environmental Sciences, UK RG Williams --- School of Environmental Sciences, UKAn exercise in ‘data archaeology’ at Ascension Island has provided an estimate of sea level change between 1955 and 2001.5 (the mid-point of a recent dataset spanning 1993–2009). That average trend of 0.93 mm y−1 (SE 0.69) compares to a... -
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... -
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... -
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... -
Shallow-water, nearshore current dynamics in Algoa Bay, South Africa, with notes on the implications for larval fish dispersal
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Pattrick --- Department of Ichthyology and Fisheries Science, South Africa NA Strydom --- , South Africa WS Goschen --- , South AfricaNearshore currents play a vital role in the transport of eggs and larval stages of fish. However, little is known about their complexity and the implications for dispersal of fish larvae. The study describes the complexity of the shallow nearshore... -
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... -
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... -
Reduced seabird night strikes and mortality in the Tristan rock lobster fishery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JP Glass --- Tristan Fisheries Department, Central South Atlantic Ocean PG Ryan --- Percy FitzPatrick Institute, DST/NRF Centre of Excellence, South AfricaThe main impact of the fishery for Tristan rock lobster Jasus tristani on seabirds at the Tristan archipelago and Gough Island is through night strikes, when petrels collide with a ship after being disorientated by its lights. Tristan fishery observers... -
Socio-economic aspects of the Sodwana Bay SCUBA diving industry, with a specific focus on sharks
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Dicken --- KwaZulu-Natal Sharks Board, South AfricaUnderstanding socio-economic aspects of the diving industry at Sodwana Bay, including data on participant motivation and expenditure, is crucial for the effective management of the St Lucia and Maputaland marine protected areas, South Africa. Between July 2011 and July 2012... -
Occurrence of larval fishes in a rocky shore-associated nursery area in temperate South Africa, with emphasis on temperature-related growth in dominant Sparidae
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NA Strydom --- Nelson Mandela Metropolitan University, South Africa AJ Booth --- Department of Ichthyology and Fisheries Science, South Africa A McLachlan --- Nelson Mandela Metropolitan University, South AfricaLarval fishes were studied in Shark Bay on the warm, temperate south-east coast of South Africa. The bay is a small, shallow, subtidal area associated with a rocky shore. Sampling took place fortnightly for a period of one year (September... -
Inclusive Growth and Institutions: An Analysis of the Employment Structure of India's Tea Plantation Sector
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Namrata Thapa [d858062e18]It is generally held that though the Indian economy has been experiencing high growth in the post-reform period, it is not inclusive and that certain sectors, regions and population of the country are being excluded from the benefits of growth... -
Alternative eucalypt species for Zululand: Seven year results of site: species interaction trials in the region
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R A W Gardner --- , South AfricaThe ICFR initiated a search for alternative eucalypt species for the Zululand Coastal Plain region during 1992 by establishing a series ofsite: species interaction trials in the area. Sixteen pure species (seedlings), one E. grandis intra-specific clone and five inter-specific... -
Prospects of eucalypt species, including interspecific hybrids from South Africa, for hardwood plantations in marginal subtropical environments in Queensland, Australia
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: D J Lee --- , D G Nikles --- , G R Dickinson --- ,In Australia, there has been rapid expansion in recent years of commercial plantations of hardwood timber species, especially of Eucalyptus and Corymbia. In tropical and sub-tropical Queensland the land most likely to be readily available for this planting is in... -
Farmers' tree planting and access to germplasm in the southern highlands of Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Anders Aalbaek --- Department of Economics and Natural Resources,This article examines the effects ofinsufficient availability of planting material on farmers' tree planting in the southern highlands ofTanzania. Patterns in scale of farmers' tree planting, species preferences, and experienced availability of planting material are investigated and compared with past... -
Early performance of Casuarina junghuhniana provenances/land races at Lushoto, Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S.T. Mwihomeket --- , Tanzania A.G. Mugasha --- Department of Forest Biology, Faculty of Forestry and Nature Conservation, Tanzania S.A.O. Chamshama --- Department of Forest Biology, Faculty of Forestry and Nature Conservation, Tanzania M.A. Mgangamundo --- Department of Forest Biology, Faculty of Forestry and Nature Conservation, Tanzania O.C. Kumburu --- Department of Forest Biology, Faculty of Forestry and Nature Conservation, Tanzania Z. Lupala --- Department of Forest Biology, Faculty of Forestry and Nature Conservation, TanzaniaA trial involving 21 provenances form Indonesia and 7 “local” seed sources of Casuarina junghuhniana was established at Lushoto, Tanzania in March 1997. At 22 and 48 months of age, the following characteristics were assessed: survival, root collar diameter (RCD... -
Evaluation of 19 provenances of Calliandra calothyrsus at Gairo and SUA Farm, Morogoro,Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: M. Herbert --- Department of Forest Biology, Faculty of Forestry & Nature Conservation, Tanzania A. G. Mugasha --- Department of Forest Biology, Faculty of Forestry & Nature Conservation, Tanzania S.A.O. Chamshama --- Department of Forest Biology, Faculty of Forestry & Nature Conservation, TanzaniaPerformance evaluation was conducted among nineteen provenances of Calliandra calothyrsus from mesa-America, Indonesia and Tanzania. Two trials were established in February and March, 1996 at Gairo (8 provenances) and Sokoine University of Agriculture (SUA) Farm (17 provenances) in Morogoro, Tanzania... -
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... -
Biological processes as indicators of sustainable plantation forestry
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: MaryC Scholes --- School of Animal, Plant and Environmental Sciences,This paper discusses the use of an ecosystems approach in the management of plantations and the concept of plantations in providing goods and services. Ecological indicators are compared for the CIFOR and South African systems. The CIFOR system focuses on... -
The impact of the addition of Eucalyptus grandis wood chips on nitrogen availability in plantation soils
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: TheresaL. Bird --- School of Animal, Plant and Environmental Sciences, MaryC. ScholesThe impact of plantation residues, as a result of clearfelling, on nutrient availability in plantation systems, as well as the difficulties during subsequent planting and harvesting, should be considered in the development of plantation management strategies. The aim of this... -
Management options For Australian Blackwood (Acacia melanoxylon) in Southern Cape Forests, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: A.H.W. Seydack --- Department of Water Affairs and Forestry,Australian Blackwood (Acacia melanoxylon) was actively introduced into the indigenous forests of the southern Cape until about 1930. On the perception that this exotic species constituted a threat to the indigenous forest, a policy of eradication was followed. This perception... -
Determination of land and tree values of hybrid poplar plantations: A case study for Turkey
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Sait Engindeniz --- The University of Ege, Faculty of Agriculture, Turkey Aysen Olgun --- The University of Ege, Faculty of Agriculture, TurkeyValuation of poplar plantations is important in condemnation, taxation, loan, insurance, inheritance, and purchase-sale cases. In general, for the appraisal ofland value of poplar plantations, sales comparison and income capitalization approaches can be used. In appraisal of tree values sales... -
Reverting urban exotic pine forests to Macchia and indigenous forest vegetation, using cable-yarders on the slopes of Table Mountain, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Pierrre Ackerman --- Forest Engineering, Faculty of Agricultural and Forestry Sciences, South Africa Bruce Talbot --- Skov & Landskab, DenmarkThis paper discusses some ofthe issues faced during the initial phases of a 12-year long project, which will ultimately result in the transformation of 53 ha of urban pine forests to a more diverse natural vegetation cover. Public sentiment, harvesting... -
Effect of planting depth on growth of open-rooted Pinus elliottii and Pinus taeda seedlings in the United States
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Curtis L. VanderSchaaf --- School of Forestry and Wildlife Sciences, and Alabama Agricultural Experiment Station, USA David B. South --- School of Forestry and Wildlife Sciences, and Alabama Agricultural Experiment Station, USAThree studies in the Coastal Plain of Georgia were remeasured 7 or 8 years after planting to determine the effects of planting depth on field performance of open-rooted seedlings [root-collar diameter (RCD) ≤ 5 mm]. Average planting depth (i.e, shoot... -
Does soil compaction on harvesting extraction roads affect long-term productivity of Eucalyptus plantations in Zululand, South Africa?
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Colin W. Smith --- ,The effect ofsoil compaction on the growth of Eucalyptusgrandis and two clonal hybrids (Eucalyptus grandis x urophylla (E. gxu) and Eucalyptus grandis x camaldulensis (E. gxc)) was evaluated on harvesting extraction roads at three sites in the Zululand region ofKwaZulu-Natal... -
African sandalwood (Osyris lanceolata): Resource assessment and quality variation among populations in Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: P.L. Mwang'ingo --- Silviculture Research Centre, Tanzania Z. Teklehaimanot --- School ofAgricultural and Forest Sciences, United Kingdom J.B Hall --- School ofAgricultural and Forest Sciences, United Kingdom L.L.L. Lulandala --- Department of Forest Biology, Faculty of Forestry and Nature Conservation, TanzaniaAfrican sandalwood (Osyris lanceolata) populations occurring in Tanzania were assessed to determine the current resource status and ascertain variation in quality existing among them. This will provide a guide inthe selection ofpopulations where conservation efforts and improvement programmes can be... -
The effect of applying prophylactic measures on the post-planting survival of Pinus patula in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchel --- , J. Zwolinski --- Forestry Programme, N. Jones --- Forestry Programme, T. Coutinho --- Department of Microbiology and Plant Pathology,The observed survival of Pinus patula seedlings and cuttings has, on many occasions, been inadequate in nurseries and after field planting in South Africa. There have however, been several reports that survival can be improved if a fungicide is applied... -
Stand biomass and volume estimation for Miombo woodlands at Kitulangalo, Morogoro, Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S.A.O. Chamshama --- Faculty of Forestry and Nature Conservation, Tanzania A.G. Mugasha --- Faculty of Forestry and Nature Conservation, Tanzania E. Zahabu --- Faculty of Forestry and Nature Conservation, TanzaniaTree volume and biomass equations developed for Kitulangalo area in Morogoro, Tanzania ignored small branches and small trees. Consequently, this study was carried out to develop new individual tree volume and biomass equations, and assess current regeneration status, biodiversity and... -
Influence of the origin of stem cutting, season of collection and auxin application on the vegetative propagation af African Sandalwood (Osyris lanceolata) in Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Z. Teklehaimanot --- School of Agricultural and Forest Sciences, UK P.L. Mwang'ingo --- Tanzania Forestry Research Institute, Tanzania A.G. Mugasha --- Department of Forest Biology, Faculty of Forestry and Nature Conversation, Tanzania C.K. Ruffo --- Tanzania Tree Seed Agency, TanzaniaAn investigation into the possibility of propagating O.lanceolata through stem cutting was carried out at Tanzania Tree Seed Agency, Iringa Zone, Tanzania. The aim was to test the potential of stem cuttings in providing an alternative/supplement to the use of... -
Early growth and survival of Acacia galpinii after planting in a semi-arid environment in Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: D. Mlambo --- National University of Science and Technology, Zimbabwe P. Nyathi --- National University of Science and Technology, Zimbabwe P. Milo --- National University of Science and Technology, ZimbabweAcacia galpinii grows naturally on the riverbanks and smaller drainage lines in semi-arid areas ofSouthern Africa. Trial planting of the species as a decorative tree commenced in 1993 along urban roads in Bulawayo, Zimbabwe. Early growth and survival of the... -
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... -
Oil yield and quality variation between sexes in Osyris lanceolata (African sandalwood) and its value as a fodder plant in Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: PL Mwang’ingo --- Faculty of Science, Tanzania G Kibodya --- Faculty of Science, Tanzania AR Mng’ong’o --- , TanzaniaAfrican sandalwood (Osyris lanceolata) is widely harvested in East Africa for extraction of oil, which is used in the fragrance and perfumery industry. Over the years, harvesting of the species has been concentrated to female plants because it is claimed... -
A financial evaluation of two contrasting silvicultural systems applicable to Pinus taeda grown in north-east Uruguay
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: A Bussoni --- Departamento de Ciencias Sociales, Facultad de Agronomía, Uruguay J Cabris --- Departamento de Producción Forestal y Tecnología de la Madera, Facultad de Agronomía, UruguayThe Loblolly pine (Pinus taeda L.) plantation area in north-east Uruguay was 108 000 ha in 2008. Recent industrial capacity developments have resulted in major structural changes. Silvicultural system selection depends on site productivity, costs, timber prices and public policies... -
Growth and yield models for Eucalyptus grandis grown in Swaziland
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: M du Plessis --- , South Africa H Kotze --- , South AfricaThe aim of this study was to develop a stand-level growth and yield model for short-rotation Eucalyptus grandis grown for pulp wood production at Piggs Peak in Swaziland. The data were derived from a Nelder 1a spacing trial established with... -
Excavator-based processor operator productivity and cost analysis in Zululand, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: G Hogg --- Department of Forest and Wood Science, South Africa R Pulkki --- Department of Forest and Wood Science, South Africa P Ackerman --- Department of Forest and Wood Science, South AfricaOperator impact on productivity and cost using similar processor machines was addressed in this case study. The study had two objectives: (1) determine the extent of operator productivity variation between six processor operators in a harvesting operation; and (2) determine... -
Variation in seed rain from Widdringtonia whytei growing in different conditions on Mulanje Mountain in Malawi
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: TF Chanyenga --- Department of Forest and Wood Science, Malawi CJ Geldenhuys --- Department of Forest and Wood Science, South Africa J Harvey --- Department of Statistics and Actuarial Sciences, South AfricaMulanje Mountain is one of the examples of tropical montane landscapes with plant populations varying in size from small fragments of less than 1 ha to riverine strips and stands of more than 100 ha. Seed availability is a potential... -
Biomass harvesting in Eucalyptus plantations in Western Australia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MR Ghaffariyan --- CRC for Forestry, Australia M Brown --- CRC for Forestry, Australia M Acuna --- CRC for Forestry, Australia J Sessions --- Department of Forest Engineering, Resources and Management, USA M Kuehmaier --- Institute of Forest Engineering, Austria J Wiedemann --- CRC for Forestry, AustraliaAustralia is at an early stage of exploring the use of forest biomass to generate energy. This study evaluated the biomass yield and the productivity rates of equipment for harvesting biomass in a poor-quality eucalypt plantation. The operation consisted of... -
Low light availability affects leaf gas exchange, growth and survival of Euterpe edulis seedlings transplanted into the understory of an anthropic tropical rainforest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MLS dos Santos --- Departamento de Ciências Agrárias e Ambientais, Brazil S França --- Departamento de Ciências Agrárias e Ambientais, Brazil FP Gomes --- Departamento de Ciências Biológicas, Brazil JL do Nascimento --- Departamento de Ciências Agrárias e Ambientais, Brazil L dos Anjos Silva --- Departamento de Ciências Biológicas, Brazil MS Mielke --- Departamento de Ciências Biológicas, BrazilEuterpe edulis Mart. (Arecaceae) is a threatened palm tree of the Brazilian Atlantic Rainforest understory with fundamental importance for the restoration of degraded forest environments. We assessed the leaf gas exchange, growth and survival of E. edulis seedlings transplanted at... -
Stand basal area model for Cunninghamia lanceolata (Lamb.) Hook. plantations based on a multilevel nonlinear mixed-effect model across south-eastern China
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: LiFang Zhao --- Center for Earth Observation and Digital Earth, China ChunMing Li --- Institute of Forest Resource Information Techniques, ChinaBased on a multilevel nonlinear mixed-effect model approach, a stand basal area model was developed for Cunninghamia lanceolata (Lamb.) Hook. plantations belonging to the National Forest Inventory in China. The database consists of 583 plots embracing 18 different blocks within... -
Plant regeneration by somatic embryogenesis in Eucalyptus spp.: current status and future perspectives
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Glória Pinto --- Department of Biology and Centre for Environmental and Marine Studies (CESAM), Portugal Clara Araújo --- Altri Florestal SA, Portugal Conceição Santos --- Department of Biology and Centre for Environmental and Marine Studies (CESAM), Portugal Lucinda Neves --- Altri Florestal SA, PortugalForest tree improvement programs benefit from the emergence of new biotechnological strategies that complement plant developmental biology and discovery of genes associated with complex multigenic traits. Recently, significant progress has been made in the area of plant regeneration via somatic... -
Growth response at age 10 years of five Eucalyptus genotypes planted at three densities on a drought-prone site in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jacob Crous --- Sappi Forests, South Africa Louisa Burger --- Department of Forest and Wood Science, South Africa Giovanni Sale --- Sappi Forests, South AfricaSouth Africa's climate is characterised by the occurrence of regular droughts. An assessment of drought mortality in KwaZulu-Natal during 1999 could not provide accurate information regarding the effect of species or planting density on mortality because of confounding species-site allocations... -
Relationships between diameter and height of trees in natural tropical forest in Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Wilson A Mugasha --- Department of Ecology and Natural Resource Management, Norway Ole M Bollandsås --- Department of Ecology and Natural Resource Management, Norway Tron Eid --- Department of Ecology and Natural Resource Management, NorwayThe relationship between tree height (h) and tree diameter at breast height (dbh) is an important element describing forest stands. In addition, h often is a required variable in volume and biomass models. Measurements of h are, however, more time... -
A comparison between excavator-based harvester productivity in coppiced and planted Eucalyptus grandis compartments in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Muedanyi Ramantswana --- Nelson Mandela Metropolitan University, South Africa Andrew McEwan --- Nelson Mandela Metropolitan University, South Africa Jaap Steenkamp --- Nelson Mandela Metropolitan University, South AfricaDue to the labour challenges in South Africa, mechanised forestry equipment has increasingly been required to operate in complex forest conditions – such as coppiced Eucalyptus compartments – where they have not operated before. For this reason, harvesters are either... -
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... -
The role of pregnancy intention in HIV prevention in South Africa: a proposed model for policy and practice
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: MarjorieR Sable KayM Libbus Debra Jackson Harry HauslerMother-to-child transmission is a continuing source of new HIV infections in South Africa. The paper posits that insight into the socio-cultural, behavioural, environmental and economic factors that sustain the HIV epidemic is as important as understanding the biological causes of... -
Migration, pastoralists, HIV infection and access to care: the nomadic Fulani of northern Nigeria
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Abdulrazaq Garba Habib Jibril JumareThe burden of HIV infection among the nomadic Fulani of northern Nigeria is unknown. Migration — a way of life for this population — is known to increase the rate of HIV transmission and may limit individuals' access to treatment... -
Community approaches to preventing mother-to-child HIV transmission: perspectives from rural Lesotho
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Megan Towle DanielH LendeThis paper examines the cultural and structural difficulties surrounding effective prevention of mother-to-child HIV transmission (PMTCT) in rural Lesotho. We argue for three strategies to improve PMTCT interventions: community-based research and outreach, addressing cultural and structural dynamics, and working with... -
Use and neglect of best-practice HIV/AIDS programme guides by South African companies
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ronald Whelan David Dickinson Tessa MurrayNumerous guidelines set out best-practice policies for HIV/AIDS interventions in the workplace. This study analysed 14 recognised codes and guidelines to gain an understanding of the theoretical consensus regarding the key components of best-practice workplace HIV/AIDS interventions. Nine key components... -
School managers' understanding of HIV/AIDS in Gauteng, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: UchennaB Amadi-IhunwoThis paper presents the diverse understandings of HIV/AIDS and people living with HIV (PLHIV) revealed by school managers in a selection of public schools in Gauteng Province, South Africa. Discussions with school managers emerged as part of a larger investigation... -
Bridging the gap between VCT and HIV/AIDS treatment uptake: perspectives from a mining-sector workplace in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Anil Bhagwanjee Inge Petersen Olagoke Akintola Gavin GeorgeThis qualitative study sought to understand users' perceptions of the voluntary counselling and testing (VCT) and HIV-treatment services offered by a mining company in South Africa, with the intention of making recommendations to improve the rates of uptake. A purposive... -
HIV epidemiology and trends in a large national manufacturing company in South Africa, 2001–2006
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Clive EvianThis paper presents epidemiological data from ongoing HIV-prevalence surveillance in a large South African manufacturing company located in various provinces, as well as one location in Swaziland. A survey of the workforce in 12 of the manufacturer's business units (BUs)... -
KwaZulu-Natal commercial farmers' perceptions of and management responses to HIV/AIDS
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Lyndon Gray --- Agricultural Economics, School of Agricultural Sciences and Agribusiness, South Africa Stuart Ferrer --- Agricultural Economics, School of Agricultural Sciences and Agribusiness, South Africa Gerald Ortmann --- Agricultural Economics, School of Agricultural Sciences and Agribusiness, South AfricaThis study examines commercial farmers' perceptions of and management responses to the HIV epidemic, among a sample in KwaZulu-Natal Province in South Africa. The analysis is based on responses to a postal survey of commercial farmers belonging to KwaZulu-Natal Agricultural... -
Recommendations for communication to enhance informed consent and enrolment at multilingual research sites
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Claire Penn --- Health Communication Project, School of Human and Community Development, South Africa Melanie Evans --- Health Communication Project, School of Human and Community Development, South AfricaLanguage issues can affect HIV and AIDS research trial enrolment, but little is understood about variables in this process. Some evidence indicates barriers exist even when the trial enrollers are linguistically and culturally matched to the participants and when consent... -
Artistic activities and cultural activism as responses to HIV/AIDS in Harare, Zimbabwe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Susan Pietrzyk --- Department of Anthropology, United StatesOver the last two decades both the number and types of civil-society-led organisations involved in addressing HIV and AIDS have increased dramatically. In many cases, the work undertaken is thoughtfully researched, appropriately focused, and as a result produces positive outcomes... -
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,... -
Groundwater seeps as potentially important refugia for freshwater fishes on the Eastern Shores of Lake St Lucia, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SvenM Vrdoljak RobC HartThe freshwater wetlands on the Eastern Shores of Lake St Lucia provide an important habitat for freshwater fishes, including a number of IUCN Red Listed species. The ecology of these wetlands is influenced greatly by water flowing from the large... -
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... -
The community composition and biomass of pelagic ciliated protozoa in East African lakes
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AndrewW Yasindi WilliamD Taylor DenisH LynnThe community composition and biomass of planktonic ciliates were studied in 17 tropical East African lakes varying from freshwater to saline, and from oligotrophic to eutrophic. The conductivity of the lakes varied from 207μS cm−1 to 70 000μS cm−1. Chlorophyll... -
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... -
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... -
The fishery for, and local distribution of, Aristeus antennatus (Risso 1816) (Crustacea: Dendrobranchiata) off western Algeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Mouffok A Kherraz D Bouras Z BoutibaThis study presents data on the local distribution and yield of red shrimp Aristeus antennatus (Risso 1816) from a new deep-water fishery on the western Algerian slope obtained from commercial trawl fisheries at Oran and Arzew ports between 1999 and... -
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... -
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... -
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... -
Growth and economic performance of Clarias gariepinus juveniles fed diets containing velvet bean, Mucuna pruriens, seed meal
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AZ Aderolu --- Department of Marine Sciences, VM Akpabio --- Department of Marine Sciences,The partial replacement of fishmeal with mucuna seed meal in the diet of cultured juvenile Clarias gariepinus was tested over 70 days to determine their growth, nutrient and economic performance. The 25% fishmeal component of the control diet was replaced... -
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... -
Age estimation, growth rate and size at sexual maturity of tigerfish Hydrocynus vittatus from the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Gerber --- Centre for Aquatic Research, Department of Zoology, South Africa NJ Smit --- Centre for Aquatic Research, Department of Zoology, South Africa GM Pieterse --- Centre for Aquatic Research, Department of Zoology, South Africa D Durholtz --- , South AfricaThe aims of this study were to determine relative age, growth rate and size at maturity of tigerfish in the Okavango Delta as a basis for the development of a fisheries management plan. A total of 206 tigerfish Hydrocynus vittatus,... -
The Bryozoa of subantarctic Marion and Prince Edward Islands: illustrated keys to the species and results of the 1982–1989 University of Cape Town surveys
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Branch PJ HaywardThe Bryozoa of subantarctic Marion and Prince Edward Islands were sampled over the period 1982–1989 by dredging, SCUBA-diving and intertidal surveys. This paper comprises illustrated keys to all 82 species of Bryozoa collected during these and previous surveys, including 15... -
Role of pelagic crustaceans in the diet of the longnose lancetfish Alepisaurus ferox in the Seychelles waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Potier F Ménard Y Cherel A Lorrain R Sabatié F MarsacThe role of pelagic crustaceans in the diet of the longnose lancetfish Alepisaurus ferox was investigated from stomach content analysis of fish collected in the waters surrounding the Seychelles Archipelago in the western Indian Ocean. Crustaceans accounted for 88.4% by... -
First tracking of white stumpnose Rhabdosargus globiceps (Sparidae) in a South African marine protected area
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CG Attwood PD Cowley SE Kerwath TF Naesje F Økland EB ThorstadThere is a growing recreational fishery for white stumpnose Rhabdosargus globiceps (Sparidae) in Langebaan Lagoon, part of South Africa's West Coast National Park. The upper reaches of the lagoon are protected from fishing, but the extent to which the closure... -
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... -
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... -
Escapement of Cape hakes under the fishing line of the Namibian demersal sampling trawl
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Jørgensen A Engås E Johnsen T Iilende P Kainge P SchneiderSwept area surveys in Namibian waters provide input data to the stock assessment model. To evaluate the model's predictions, it is important to understand the catch efficiency of sampling trawls. The objective of this study was to establish whether Cape... -
Phylogeographic structure of the caridean shrimp Palaemon peringueyi in South Africa: further evidence for intraspecific genetic units associated with marine biogeographic provinces
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PR Teske PW Froneman NP Barker CD McQuaidRecent genetic studies have shown that most widely distributed, passively dispersing invertebrates in southern Africa have regional intraspecific units that are associated with the three main marine biogeographic provinces (cool-temperate, warm-temperate and subtropical). The caridean shrimp Palaemon peringueyi also occurs... -
On the feasibility of a directed trap-fishery for panga Pterogymnus laniarius (Sparidae) in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MS Gray T Hecht WHH SauerThe feasibility of a directed trap-fishery for panga Pterogymnus laniarius was investigated with special emphasis on minimising the bycatch. A total of 1 302 fish, representing 19 species, was captured in 59 trap deployments at three locations along the Eastern... -
Comparative ecology of the copepods Calanoides carinatus and Calanus agulhensis — the influence of temperature and food
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JA Huggett AJ Richardson JG FieldHypotheses regarding temperature, food abundance and food size were tested to explore niche separation between Calanoides carinatus, an abundant copepod in the cool and food-rich southern Benguela upwelling system, and Calanus agulhensis, the dominant copepod on the warmer, relatively food-poor... -
Long current to nowhere? — Genetic connectivity of Jasus tristani populations in the southern Atlantic Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S von der Heyden JC Groeneveld CA MattheeThe commercially exploited spiny lobster Jasus tristani has a disjunct distribution in the southern Atlantic Ocean, with populations occurring at the Tristan da Cunha Archipelago, Gough Island and on Vema Seamount. A distance of 2 000km separates Vema and the... -
Large-scale changes in the spatial distribution of South African West Coast rock lobsters: an overview
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Cockcroft D van Zyl L HutchingsA major shift in resource availability in the West Coast rock lobster Jasus lalandii from the traditional fishing grounds on the West Coast to the more southern fishing grounds was observed between the late 1980s/early 1990s and the turn of... -
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... -
The zooplankton community of Richards Bay Harbour and adjacent Mhlathuze Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HL JerlingDuring construction of the current Richards Bay Harbour in the early 1970s, the original shallow Mhlathuze Estuary was divided into two separate systems: a new estuary and a deep-water harbour. This study compares the zooplankton communities of the current systems... -
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... -
Present distribution and abundance of the introduced barnacle Balanus glandula Darwin in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MC Laird CL GriffithsThe date of first introduction of the North-East Pacific acorn barnacle Balanus glandula to South Africa is unknown, but it is depicted in photographic records dating back to at least 1992. Its present range and population density were determined by... -
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... -
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... -
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... -
From beans to breams: how participatory workshops can contribute to marine conservation planning
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Wheeler FMJ Chambers R Sims-Castley RM Cowling DS SchoemanSystematic conservation planning is increasingly being used in the marine environment, but the relative paucity of data on marine patterns and process still presents a problem, particularly in developing countries. For example, along the south-eastern component of the Agulhas marine... -
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... -
Extension of PIRATA in the tropical South-East Atlantic: an initial one-year experiment
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Rouault J Servain CJC Reason B Bourlès MJ Rouault N FauchereauThe Pilot (later termed Prediction) and Research Moored Array in the Tropical Atlantic (PIRATA) programme, developed as a multinational network by Brazil, France and the USA, has deployed and maintained an array of 17 Autonomous Temperature Line Acquisition Systems (ATLAS)... -
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... -
Assessing the utility of a continuous, underway fish egg sampler (CUFES) for sampling zooplankton
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Sono --- Department of Zoology, South Africa CL Moloney --- Marine Research Institute and Department of Zoology, South Africa CD van der Lingen --- Department of Environmental Affairs, South AfricaThe accuracy of using a continuous underway fish egg sampler (CUFES) to sample zooplankton was assessed by comparing CUFES samples with those collected using a vertically towed bongo net. Samples were collected concurrently by the two samplers along four inshore-offshore... -
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... -
A tale of two islands: contrasting fortunes for Subantarctic skuas at the Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PG Ryan --- , South Africa PA Whittington --- , South Africa RJM Crawford --- Department of Environmental Affairs, South AfricaSubantarctic skuas Catharacta antarctica are key predators of burrowing petrels at sub-Antarctic islands, and can be used to monitor the health of burrowing petrel populations. A survey of skuas at the Prince Edward Islands was conducted during December 2008, repeating... -
Estimates of numbers of kelp gulls and Kerguelen and Antarctic terns breeding at the Prince Edward Islands, 1996/1997–2008/2009
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PA Whittington --- , South Africa RJM Crawford --- Department of Environmental Affairs, South Africa BM Dyer --- Department of Environmental Affairs, South Africa PG Ryan --- , South AfricaBreeding numbers of Laridae and other surface-nesting seabirds have been monitored at sub-Antarctic Marion Island since 1996/1997 and counts of breeding birds were made at nearby Prince Edward Island in December 2001 and December 2008. Four species are regular breeders... -
Vagrant birds ashore at the Prince Edward Islands, southern Indian Ocean, from 1987 to 2009
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WC Oosthuizen --- Mammal Research Institute, Department of Zoology and Entomology, South Africa BM Dyer --- Department of Environmental Affairs, South Africa PJN de Bruyn --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaVagrant birds recorded ashore at Marion Island and Prince Edward Island from 1987 to 2009 are documented. In total, 101 observations (including multiple sightings of potentially the same individual) of 29 species were made. Palaearctic and Holarctic migrants (17 species),... -
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... -
Intra-archipelago moult dispersion of southern elephant seals at the Prince Edward Islands, southern Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WC Oosthuizen --- Mammal Research Institute, Department of Zoology and Entomology, South Africa MN Bester --- Mammal Research Institute, Department of Zoology and Entomology, South Africa PJN de Bruyn --- Mammal Research Institute, Department of Zoology and Entomology, South Africa GJG Hofmeyr --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaDuring three summer surveys at Prince Edward Island (PEI), southern Indian Ocean (2001, 2004 and 2008), 416 southern elephant seals Mirounga leonina were inspected for identification tags. In all, 42 seals that had been tagged as weaned pups at their... -
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... -
Climate change and desertification in South Africa—science and response
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: ERM Archer --- Climate Change, South Africa MA Tadross --- Climate Systems Analysis Group, South AfricaDespite significant attention paid to desertification and climate change in the last few decades, interactions between the phenomena, as well as implications thereof, have received less of a focus. Such a trend is particularly marked in the science– policy arena,... -
Determining grazing capacity in Namibia with the aid of remote sensing
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C Espach --- Ministry of Agriculture, LG Lubbe --- Ministry of Agriculture, N Ganzin --- Ifremer, FranceThe Namibian rangelands consist of a mixture of herbaceous and woody components. The main source of income is from farming systems with grass production the predominant source of forage. For rangeland managers to utilise this source sustainably, the accurate determination... -
A conceptual tool for improving rangeland management decision-making at grassroots level: the local-level monitoring approach
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: K Kellner --- School of Environmental Sciences and Development, South Africa AS Moussa --- School of Environmental Sciences and Development, South AfricaFor many years, rangeland monitoring has mainly been the field of scientists, academics and extension workers trying to fine-tune methods to assess the condition of rangelands. Frameworks and monitoring systems developed with their associated indicators are often complex and inaccessible... -
Some thoughts on policy and desertification: what key contributions can scientists make to policy processes in the southern African context?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J Zeidler --- Integrated Environmental Consultants Namibia (IECN), NamibiaTwo types of desertification professionals are typically characterised—the scientist and the policy-maker. After many years of efforts to combat desertification and promote sustainable land management, it is surprising that these diverging perceptions remain so fixed. They prevailed throughout the process... -
Institutions for sustainable land management: reflections on institutional aspects of implementing the UNCCD in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G von Maltitz --- Natural Resources and the Environment, South AfricaBy its nature, combating desertification is a complex, multidisciplinary activity that requires coordinated responses at a multitude of levels spanning both scientific disciplines and government departments. In the final analysis, it is at the level of the land user where... -
The impact of indigenous ungulate herbivory over five years (2004–2008) on the vegetation of the Little Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MT Hoffman --- Plant Conservation Unit, Botany Department, South Africa CF Madden --- Plant Conservation Unit, Botany Department, South Africa K Erasmus --- Sanbona Wildlife Reserve, South Africa N Saayman --- Department of Agriculture: Western Cape, South Africa JC Botha --- Department of Agriculture: Western Cape, South AfricaThis study investigated the impact of rainfall and herbivory by indigenous herbivores over five years (2004–2008) on the vegetation of the Sanbona Wildlife Reserve (SWR), a 54 000 ha privately owned conservation area in the Little Karoo. Changes in floristic... -
The effects of soil conditions and grazing strategy on plant species composition in a semi-arid savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M-L Britz D WardThe tree:grass ratio of savannas is important, especially in the semi-arid savannas of South Africa. An increase in tree cover leads to reduced productivity and profitability of rangelands. We investigated the effects of soil type and grazing strategy on the... -
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... -
A survey of plants sold by traders at Zululand muthi markets, with a view to selecting popular plant species for propagation in communal gardens
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: BG Ndawonde AM Zobolo ET Dlamini SJ SiebertA survey of medicinal plants sold at muthi markets of northern KwaZulu-Natal in South Africa was conducted by questioning 63 plant traders to identify unthreatened and threatened plants for cultivation purposes. From a total of 163 plants sold at local... -
Dry season foraging preferences of cattle and sheep in a communal area of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J Bennett PC Lent PJC HarrisWe examined landscape and habitat (vegetation) scale foraging of cattle and sheep at two communal villages in the Eastern Cape, South Africa, to determine the key resources utilised during the dry season. At the landscape scale, cattle at both sites... -
Inducible defences in Acacia sieberiana in response to giraffe browsing
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AD Zinn D Ward K KirkmanAcacia trees comprise a principal component of the diet of many African browsers. The resultant browsing pressure has led to the evolution of both physical and chemical responses in Acacia trees. In an observational study, we investigated the physical and... -
Performance of Stylosanthes hamata in the rangelands of northern Ghana
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SY Annor JR CofieStylosanthes hamata (stylo) was introduced into communities in the Northern Savanna Zone of Ghana in 1994 for rangeland improvement through oversowing. The objective of this study was to assess the performance of S. hamata in northern Ghana. The study was... -
Livestock grazing behaviour along a degradation gradient in the Somali region of eastern Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Amaha Kassahun HA Snyman GN SmitLivestock grazing behaviour is poorly understood in the arid rangelands of Ethiopia, resulting in inadequate rangeland management and grazing systems, which are no improvement on the traditional practices by pastoralists. This study aimed at quantifying the influence of rangeland degradation... -
Influence of land use on phytomass accumulation in Highland Sourveld grassland in the southern Drakensberg, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TG O'ConnorTransformation of indigenous vegetation for production purposes impacts negatively on biodiversity but does this necessarily equate with a decrease in phytomass accumulation, which may influence carbon sequestration? Phytomass accumulation was studied for common land covers of beef ranching or dairy... -
Effects of low rates of nitrogen and phosphorus fertilisers on productivity of an annual African clover, Trifolium quartinianum cultivar Mealton 5, for zero grazing in Kenyan highland smallholdings
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J Muthoni LMS AkundabweniZero grazing is the cornerstone of dairying in intensively cultivated smallholdings in Kenya. The cut and carry method of forage harvesting increasingly is leading to soil mining, especially of phosphorus (P) and nitrogen (N). This problem is more serious in... -
The effect of mulching and fertilising on growth of over-sown grass species in degraded rangeland in north-eastern Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Kidane Gebremeskel PJ PieterseA study to investigate oversowing of grass species as a restoration strategy in severely degraded rangeland was carried out in the Allaidege rangeland in north-eastern Ethiopia. Locally collected seeds of three grass species (Enteropogon rupestris, Ischaemum afrum and Tragus berteronianus)... -
Challenges for emerging livestock farmers in Limpopo province, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: ND MacLeod CK McDonald FP van OudtshoornLand redistribution schemes (e.g. Settlement Land Acquisition Grant and Land Redistribution for Agricultural Development) initiated since the mid-1990s in Limpopo province under national land reform programs have sought to introduce a new generation of previously disadvantaged people to commercial livestock... -
Exploring differences of soil quality as related to management in semiarid rangelands in the western Bophirima District, North West province, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AS Moussa L van Rensburg K Kellner A BationoDifferences in land-use management may result in different rangeland condition (soil, vegetation and biodiversity) and productivity. Vegetation condition in contrasting land-use management systems is well documented in semiarid rangelands, but relatively little information is available on soil quality. This study... -
Different responses of Eragrostis curvula and Themeda triandra to rapid- and slow-release fertilisers: insights into their ecology and implications for fertiliser selection in pot experiments
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: RWS Fynn J NaikenIn a pot experiment, we examined the response of Eragrostis curvula and Themeda triandra to 0, 15, 30 and 60 g m−2 of nitrogen (N) supplied either as a rapid-release fertiliser (Sasol Nitro NPK) or a slow-release fertiliser (Plantacote Plus)... -
Vegetative traits predict grass species' invasiveness and the invasibility of restored grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: RWS Fynn --- School of Biological and Conservation Sciences, South Africa PD Wragg --- School of Biological and Conservation Sciences, South Africa CD Morris --- Agricultural Research Council, South Africa KP Kirkman --- School of Biological and Conservation Sciences, South Africa J Naiken --- School of Biological and Conservation Sciences, South AfricaUnderstanding how grass species' traits relate to their invasiveness and the invasibility of their monocultures can inform restoration of diverse grassland. We measured vegetative traits for 18 bunch grass species local to Pietermaritzburg (KwaZulu-Natal, South Africa) and measured their competitive... -
Testing for a decline in secondary productivity under desertification in subtropical thicket, South Africa, using Angora goats: lessons for experimental design
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TA Milne --- Centre for African Conservation Ecology, Department of Zoology, South Africa GIH Kerley --- Centre for African Conservation Ecology, Department of Zoology, South AfricaThere are few tests of the predicted decline of secondary productivity in desertified rangelands, despite this being one of the major concerns around desertification. Subtropical thicket, largely used for goat pastoralism, suffers extensive transformation typical of desertification. We measured body... -
Renewable energy: the potential opportunities and obligations of plantation forestry
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: B Talbot PA AckermanGlobal demand for woody biomass in substituting fossil fuels does, and will increasingly, place significant pressure on timber plantations and question conventional management practices. Plantations are rationally laid out, located in areas of high productivity, typically have good infrastructure, and... -
Growth responses of Eucalyptus globulus and E. nitens to pruning and fertiliser treatments in a plantation managed for solid-wood products
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: D Wiseman E Pinkard T Wardlaw C Mohammed M Hall C BeadleThe responses of Eucalyptus globulus and E. nitens to pruning (removal of 0 or 60% of the green crown depth) in two lifts and nitrogen (N) fertiliser application (0 [N0], 100 [N1], 300 [N3] and 500 [N5] kg N ha–1)... -
Effect of weeding and fertilisation on bark thickness and stem form of seven pine species on a low-elevation site at Usutu, Swaziland
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JW Crous --- , South Africa AR Morris --- , South Africa S Khoza --- , SwazilandOn a low-elevation site at Usutu alternative species to Pinus elliottii, the species recommended in the past for such sites, were planted to evaluate growth differences. At rotation age, destructive stem profile analyses were conducted on some of the trees... -
Effect of phosphorus and potassium fertiliser on tree growth and dry timber production of Pinus patula on gabbro-derived soils in Swaziland
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JW Crous --- , South Africa AR Morris --- , South Africa MC Scholes --- School of Animal, Plant and Environmental Sciences, South AfricaA trial designed to determine the optimum timing and rate of application of phosphorus (P) and potassium (K) fertiliser, to mitigate a growth decline observed in P. patula stands located on the gabbro-derived soils (underlying 13% of the plantation area)... -
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... -
Toward sustainable harvesting of Africa's largest medicinal plant export (Prunus africana): a case study in Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JR Maximillian --- College of Natural Resources, USA J O'Laughlin --- College of Natural Resources, USAGlobal demand for treating prostate disorders with Prunus africana bark extract has made P. africana Africa's largest medicinal plant export. Unsustainable harvesting practices can lead to local extirpations of this multipurpose tree. Survey research targeting P. africana harvesters in a... -
The socioeconomic status of the non-timber forest product subsector in Swaziland
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: CS Dlamini --- Department of Forest and Wood Science, Faculty of Agrisciences, South Africa CJ Geldenhuys --- Department of Forest and Wood Science, Faculty of Agrisciences, South AfricaA wide spectrum of non-timber forest products (NTFPs) generally has a remarkable contribution to the household economy in rural areas. Most communities make a living either through their domestic or commercial use. The objective of this study was to review... -
Solid-wood production from temperate eucalypt plantations: a Tasmanian case study
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: C Beadle P Volker T Bird C Mohammed K Barry L Pinkard D Wiseman C Harwood R Washusen T Wardlaw G NolanSince 1988, there has been a major focus in Tasmania on research for the management of temperate eucalypt plantations for solid wood. This coincided with the formal transfer of large areas of native forest that had previously been part of... -
Realising the benefit of research in eucalypt plantation management
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: AR MorrisThe development of a plantation eucalypt wood-based forest products industry in South Africa is outlined. Forest research that has contributed to increasing wood production from the ultimately finite land resource available for industrial plantations is reviewed. The application of this... -
Eucalypt pests and diseases: growing threats to plantation productivity
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MJ Wingfield B Slippers BP Hurley TA Coutinho BD Wingfield J RouxPlantations of eucalypts (species of Eucalyptus and Corymbia), particularly in the tropics and Southern Hemisphere, have expanded dramatically during the course of the last 100 years. The nature of these plantations has changed substantially as selection, breeding, hybridisation, vegetative propagation... -
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... -
Blue whales Balaenoptera musculus off Angola: recent sightings and evaluation of whaling data
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Figueiredo --- Sítio da Fonte da Murta, Portugal CR Weir --- Ketos Ecology, UKThe population of blue whales Balaenoptera musculus inhabiting the South-East Atlantic (Gabon to South Africa) was heavily depleted by commercial whaling. We report four photographically-verified sightings, and one probable sighting, of blue whales in deep waters (>1 000 m) off... -
Effect of water trophic level on the impact of the water hyacinth moth Niphograpta albiguttalis on Eichhornia crassipes
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Canavan --- Department of Zoology and Entomology, South Africa JA Coetzee --- Department of Zoology and Entomology, South Africa MP Hill --- Department of Zoology and Entomology, South Africa ID Paterson --- Department of Zoology and Entomology, South AfricaEutrophication contributes to the proliferation of alien invasive weed species such as water hyacinth Eichhornia crassipes. Although the South American moth Niphograpta albiguttalis was released in South Africa in 1990 as a biological control agent against water hyacinth, no post-release... -
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... -
Preliminary evaluation of guava selections for guava wilt disease resistance in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Maritha H Schoeman --- Agricultural Research Council–Institute for Tropical and Subtropical Crops, South Africa Nico Labuschagne --- Department of Microbiology and Plant Pathology, South AfricaGuava wilt disease (GWD), caused by Nalanthamala psidii, is a serious disease occurring in the guava-producing areas of the Mpumalanga and Limpopo provinces of South Africa. Two resistant guava rootstocks, TS-G1 and ‘TS-G2’, were developed by the ARC-ITSC in 1995... -
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... -
Testing pelargonic acid and pyraflufen-ethyl with glyphosate as alternatives to paraquat dichloride for the preparation of fire-break tracer lines at Underberg, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Keith M Little --- Nelson Mandela Metropolitan University, South Africa Ryan Nadel --- Institute for Commercial Forestry Research, South AfricaOver the past 31-year period, about 18 700 ha annum−1 of planted forests in South Africa have been lost through fire. In forested areas where the risk of fire entering compartments is always high, fire-break tracer lines are prepared by... -
The genetics of obesity: the role of the melanocortin 4 receptor
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: MG Logan --- Department of Immunology, South Africa MS Pepper --- Department of Immunology, South AfricaObesity, which is described clinically by a body mass index (BMI) of > 30 kg/m2 is increasing at an alarming rate, and is recognised as a chronic disease by the World Health Organization (WHO). This epidemic decreases life expectancy, and... -
Lipid accumulation and alkaline phosphatase activity in human preadipocytes isolated from different body fat depots
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: AT Ali --- Department of Chemical Pathology, National Health Laboratory Service, WF Ferris --- Division of Endocrinology, Department of Medicine, Faculty of Health Sciences, CB Penny --- Department of Medicine, M-T Van der Merwe --- University of Pretoria and Waterfall City Hospital, BF Jacobson --- Department of Haematology and Molecular Medicine, National Health Laboratory Service, JE Paiker --- Department of Chemical Pathology, National Health Laboratory Service, NJ Crowther --- Department of Chemical Pathology, National Health Laboratory Service,Background: Alkaline phosphatase (ALP) controls intracellular lipid accumulation in human preadipocytes, but it is not known whether ALP is expressed in all body fat depots, or whether it has a similar role at all sites. -
Autoimmune polyglandular syndrome type 1 in a 12-year-old Ugandan girl
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: D Kibirige --- Makerere University College of Health Sciences and Dermatology Unit, Mulago National Referral and Teaching Hospital, Uganda F Kambugu --- Makerere University College of Health Sciences and Endocrine Unit, Mulago National Referral and Teaching Hospital, UgandaAutoimmune polyglandular syndrome type 1 (APS-1), also known as autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy syndrome, is a very rare disorder of childhood. It is mainly characterised by the presence of at least two of the following: chronic mucocutaneous candidiasis, chronic hypoparathyroidism and... -
Sevoflurane or halothane with target-controlled sufentanil infusions for coronary artery bypass surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: AI Levin --- Department of Anesthesiology and Critical Care, Faculty of health Sciences, JF Coetzee --- Department of Anesthesiology and Critical Care, Faculty of health Sciences, M Coetzer --- , AR Coetzee --- Department of Anesthesiology and Critical Care, Faculty of health Sciences,Objectives -
General anaesthesia with and without intubation for patients with Cornelia de Lange syndrome
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Y Asahi --- Department of Dentistry, Japan I Tsujimoto --- 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 M Kogo --- The First Department of Oral and Maxillofacial Surgery, Japan J Kotani --- Department of Anesthesiology, JapanWe present the use of different methods of general anaesthesia in two patients with Cornelia de Lange syndrome and its contribution to the patients' oral health. -
Anaesthesia for transvenous transcatheter tricuspid valve-in-valve implantation
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: LJ Du Preez --- Department of Anaesthesiology and Critical Care, P Le Roux --- Department of Anaesthesiology and Critical Care, AR Coetzee --- Department of Anaesthesiology and Critical Care,The authors report and discuss the anaesthetic management of a transvenous transcatheter tricuspid valve replacement. The conduct of anaesthesia, the challenges encountered and the specific risks associated with the procedure will be discussed. Percutaneous tricuspid valve replacement may be safely... -
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. -
Is pregnancy termination being used as a family planning method in the Free State?
Item type: Journal Article • Journal: South African Family Practice • Authors: F Lang --- Department of Family Medicine, G Joubert --- Department of Biostatistics, EAM Prinsloo --- Department of Family Medicine,Background: This study determined the profile of women seeking termination of pregnancy (TOP) in the Free State and whether TOP was used as a family planning method. -
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, -
The infant-feeding practices of mothers enrolled in the prevention of mother-to-child transmission of HIV programme at a primary health care clinic in the Mpumalanga province, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: IS Ukpe --- Department of Family Medicine, South Africa J Blitz --- Department of Family Medicine, South Africa J Hugo --- Department of Family Medicine, South Africa M Theledi --- White River Clinic, South AfricaPurpose: To determine whether mothers attending a primary health care (PHC) clinic in the Mpumalanga province, South Africa for post-delivery prevention of mother-to-child transmission (PMTCT) of the Human Immunodeficiency Virus (HIV) follow-up care were adhering to the recommendation of exclusive... -
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”. -
Attention-deficit hyperactivity disorder in adults: a guide for the general practitioner
Item type: Journal Article • Journal: South African Family Practice • Authors: GI Van Schalkwyk --- Stellenbosch University, South Africa J SchronenAttention-deficit hyperactivity disorder (ADHD) has an estimated prevalence of 3.5% in adults. Knowledge regarding the diagnosis and treatment of this condition remains limited amongst general practitioners. The clinical presentation is highly variable, and the manifestations of the characteristic symptoms of... -
Aminoglycoside-induced balance deficits: a review of vestibulotoxicity
Item type: Journal Article • Journal: South African Family Practice • Authors: C Rogers --- Division of Communication Sciences and Disorders, L Petersen --- Division of Communication Sciences and Disorders,This article aims to inform clinicians about the current knowledge on aminoglycoside-induced vestibulotoxicity through a review of the literature. The effects of vestibulotoxicity are irreversible and may be profoundly disabling. It would appear that the sooner vestibular rehabilitation therapy is... -
Hypertension, chronic kidney disease, atrial fibrillation and the newer anticoagulants
Item type: Journal Article • Journal: South African Family Practice • Authors: B Rayner --- Division of Nephrology and Hypertension, -
Challenges faced by older women in Botswana in accessing services that address sexual and reproductive health, and family planning needs, in Botswana
Item type: Journal Article • Journal: South African Family Practice • Authors: NO Ama --- Department of Statistics, E Ngome --- Department of Population Studies,Objective: This study explored the challenges that older women from selected sites in Botswana face in accessing services that address sexual and reproductive health (SRH) and family planning (FP) needs. -
Melanoma continues to rise throughout the world
Item type: Journal Article • Journal: South African Family Practice • Authors: A Revelas --- Department of Pathology, Greece O Tahmazidis --- Department of Pathology,Melanoma has become a common form of cancer. The incidence of melanoma tends to increase with increasing latitude, being low in southern, sunny tropical areas, where dark skins are more prevalent, and high in the north, in temperature areas, where... -
Sense of humour and adolescents' cognitive flexibility
Item type: Journal Article • Journal: South African Family Practice • Authors: KGF Esterhuyse --- Department of Psychology, N Nortjé --- University of the Free State, A Pienaar --- University of the Free State, RBI Beukes --- University of the Free State,Objective: There is a lack of research on humour among adolescents in South Africa. This article examines cognitive flexibility and humour. The objective was to investigate the roles of gender and language as possible moderating variables in the relationship between... -
Mmaskitlana Play Therapy: A Case Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Rebecca Salang Modikwe --- University of South Africa, Ansie Lessing --- University of South Africa,This article explores the potential of Mmaskitlana as a form of therapy for children with emotional disorders. A case study is presented describing the use of Mmaskitlana with one learner with emotional problems from sexual abuse. Interview data and interpretative... -
Work stress, work–home interference and perceptions of organisational culture amongst insurance employees in Zimbabwe
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Rudolf M. Oosthuizen --- Department of Industrial and Organisational Psychology, Delene Visser --- Department of Industrial and Organisational Psychology, Peggy T.V. Mudzimu --- Department of Industrial and Organisational Psychology,The objective of the study was to determine the relationship between work stress, work-home interference, and perceptions of organisational culture amongst insurance employees in the Zimbabwean context. Data were collected from a sample of 190 employees (females=46%) who completed the... -
A genetic diversity analysis of South African sorghum genotypes using SSR markers
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Alina Mofokeng --- African Centre for Crop Improvement, School of Agricultural, Earth, and Environmental Sciences, South Africa Hussein Shimelis --- African Centre for Crop Improvement, School of Agricultural, Earth, and Environmental Sciences, South Africa Pangirayi Tongoona --- African Centre for Crop Improvement, School of Agricultural, Earth, and Environmental Sciences, South Africa Mark Laing --- African Centre for Crop Improvement, School of Agricultural, Earth, and Environmental Sciences, South AfricaDiverse landraces of sorghum (Sorghum bicolor (L.) Moench) are widely grown by smallholder farmers in South Africa. The objective of the study was to assess the genetic diversity present in South African sorghum genotypes using genetic distances as measured by... -
Nutrient leaching under zero tension in a subtropical clonal eucalypt plantation on a sandy soil in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Steven B Dovey --- Sustainable Forest Productivity Research, South Africa Ben du Toit --- Department of Forest and Wood Science, South Africa Willem P de Clercq --- Department of Soil Science, South AfricaLittle is known about the effects of residue burning or retention on nutrient leaching during the inter-rotation of clonal Eucalyptus grown on the sandy soils of subtropical Zululand, South Africa. A study compared zero-tension nutrient leaching through the top metre... -
Re-use of seedling containers and Fusarium circinatum association with asymptomatic Pinus patula planting stock
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Andrew R Morris --- Institute for Commercial Forestry Research, South Africa Gerda Fourie --- Department of Microbiology and Plant Pathology, South Africa Izette Greyling --- Department of Microbiology and Plant Pathology, South Africa Emma T Steenkamp --- Department of Microbiology and Plant Pathology, South Africa Nicoletta B Jones --- Sappi Forests, Shaw Research Centre, South AfricaFusarium circinatum is a pathogen causing serious post-planting mortality of Pinus patula seedlings in southern Africa. Containerised planting stock that is asymptomatic but associated with F. circinatum in the nursery is thought to be the cause of this problem. The... -
Responding to the crisis: food co-operatives and the solidarity economy in Greece
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Theodoros Rakopoulos --- The Human Economy Project, Faculty of Humanities, South AfricaThis article discusses a case of popular social response to imposed austerity and recession in Greece. It focuses on the antimiddleman movement in an Athens suburb. It also addresses the broader picture of the current Greek crisis, explaining how participants... -
Towards a human economy: reflections on a new project
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: John Sharp --- Department of Anthropology and Archaeology, South AfricaThe University of Pretoria's Human Economy project began at the end of 2010. To date it has involved eighteen post-doctoral fellows, drawn from around the world, and eight doctoral candidates, all from Africa. This paper reviews the project's progress, drawing... -
The future of warm-season, tropical and subtropical forage legumes in sustainable pastures and rangelands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: James P Muir --- Borlaug Institute, South Africa William D Pitman --- Hill Farm Research Station, USA Jose C Dubeux --- Universidade Federal Rural de Pernambuco, Brazil Jamie L Foster --- Texas A&M AgriLife Research, USAForage legumes have the potential to contribute substantially to warm-season, subtropical and tropical pastures and rangelands. Compared to grasses, they have advantages in accessing subsoil nutrients and moisture; legumes typically concentrate protein in forage, even in infertile soils, and they... -
Diet selection of goats depends on season: roles of plant physical and chemical traits
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ntuthuko R Mkhize --- Agricultural Research Council–Animal Production Institute, South Africa Peter F Scogings --- Department of Agiculture, South Africa Ignatius V Nsahlai --- Animal and Poultry Science, South Africa Luthando E Dziba --- CSIR, Natural Resources and the Environment, South AfricaThis paper reports on diet selection of goats offered six browse species (i.e. Acacia natalitia [Vachellia natalitia], Acacia nilotica [Vachellia nilotica], Dichrostachys cinerea, Grewia occidentalis, Gymnosporia maranguensis and Scutia myrtina) commonly found in moist Zululand thornveld. The hypotheses tested were:... -
Impact of cultivation method on productivity and botanical composition of a kikuyu–ryegrass pasture
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Pieter A Swanepoel --- Research and Technology Development Services, South Africa Philip R Botha --- Research and Technology Development Services, South Africa Hennie A Snyman --- Animal, Wildlife and Grassland Sciences, South Africa Chris C du Preez --- Soil, Crop and Climate Sciences, South AfricaKikuyu (Pennisetum clandestinum)–ryegrass (Lolium spp.) cultivated pastures form the base for dairy production in the southern Cape region of South Africa. The impact of various methods and implements used to over-sow ryegrass on the productivity and botanical composition of the... -
Performance of simple irrigation scheduling calendars based on average weather data for annual ryegrass
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Melake K Fessehazion --- Plant Production and Soil Science, South Africa John G Annandale --- Plant Production and Soil Science, South Africa Colin S Everson --- Plant Production and Soil Science, South Africa Richard J Stirzaker --- Plant Production and Soil Science, South Africa Michael van der Laan --- Plant Production and Soil Science, South Africa Wayne F Truter --- Plant Production and Soil Science, South Africa Amanuel B Abraha --- Plant Production and Soil Science, South AfricaPoor irrigation management in pastures can lead to yield and quality reduction as well as loss of income through extra pumping and leaching of nitrate fertiliser. A number of irrigation scheduling techniques of varying levels of sophistication have been developed... -
Characterising the diameter distribution of Sal plantations by comparing normal, lognormal and Weibull distributions at Tilagarh Eco-park, Bangladesh
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jiban Chandra Deb --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh Md Habibur Rahman Salman --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh Md Abdul Halim --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh Md Qumruzzaman Chowdhury --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, Bangladesh Anindita Roy --- Department of Forestry and Environmental Science, School of Agriculture and Mineral Sciences, BangladeshFor many years foresters have been using statistical probability density functions to describe and characterise stand structure. Predicting the current and future yields of a stand is essential for successful stand and timber management. Implicit prediction of current yield is... -
Estimating wood volume from canopy area in deciduous woodlands of Zimbabwe
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tawanda W Gara --- Department of Geography and Environmental Science, Zimbabwe Amon Murwira --- Department of Geography and Environmental Science, Zimbabwe Emmerson Chivhenge --- Department of Geography and Environmental Science, Zimbabwe Timothy Dube --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa Tsitsi Bangira --- SAEON Egagasini Node, South AfricaIn this study we tested the predictive ability of canopy area in estimating wood volume in deciduous woodlands of Zimbabwe. The study was carried out in four sites of different climatic conditions. We used regression analysis to statistically quantify the... -
Repeat photography as a tool for detecting and monitoring historical changes in South African coastal habitats
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Reimers --- Centre for Invasion Biology and Department of Biological Sciences, South Africa CL Griffiths --- Centre for Invasion Biology and Department of Biological Sciences, South Africa MT Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South AfricaRepeat photography was used to illustrate long-term changes occurring in coastal habitats in the Western Cape, South Africa. Historic images were sourced from books and theses, the public and subject specialists, and repeat photographs were then taken from the same... -
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... -
Larval development reflects biogeography in two formerly synonymised southern African coastal crabs
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: I Papadopoulos --- Molecular Zoology Laboratory (Aquatic Division), Department of Zoology, South Africa PR Teske --- Molecular Zoology Laboratory (Aquatic Division), Department of Zoology, South AfricaThe southern African crab Hymenosoma orbiculare was recently split into five distinct species, of which three are estuarine/coastal and have peripatric distributions that are linked to temperature-defined marine bioregions. This suggests that the species’ ranges may be limited by physiological... -
Reproductive behaviour among women on antiretroviral therapy in Botswana: mismatched pregnancy plans and contraceptive use
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Michelle M Schaan --- University of Kwazulu-Natal, South Africa Myra Taylor --- University of Kwazulu-Natal, South Africa Richard Marlink --- Harvard School of Public Health AIDS Initiative, USAUnderstanding pregnancy planning and contraceptive use is important in preventing unplanned/unwanted pregnancies among women on antiretroviral therapy (ART). Through a cross-sectional survey of 155 women living with HIV on ART in Botswana (mean age = 36), bivariate/multivariate analyses were used... -
Status and diurnal activity budget of non-breeding White-headed Ducks Oxyura leucocephala in Algeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Nedjwa Meziane --- Laboratoire de Recherche et de Conservation des Zones Humides, Algeria Farrah Samraoui --- Laboratoire de Recherche et de Conservation des Zones Humides, Algeria Boudjéma Samraoui --- Laboratoire de Recherche et de Conservation des Zones Humides, AlgeriaIn Algeria, the Globally Endangered White-headed Duck Oxyura leucocephala is resident throughout the year in the coastal wetlands of north-east Algeria and the Hauts Plateaux, where it occupies habitats that range from freshwater ponds and brackish marshes to hypersaline lakes... -
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, -
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... -
The syndromic child and anaesthesia
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Kotie Bester --- Department of Anaesthesia, South AfricaMany systems that are relevant to anaesthetists may be affected in syndromic children. These include the spine, airway, respiratory, cardiovascular, genitourinary and neuromuscular systems, as well as coagulation, endocrine and metabolic functions. Embryological development may explain some co-existing anomalies. Although... -
Racing risk, gendering responsibility: a qualitative study of how South African students talk about sexual risk and responsibility
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Mary van der Riet --- Psychology, School of Applied Human Sciences, South Africa Tamaryn Jane Nicholson --- Psychology, School of Applied Human Sciences, South AfricaIndividuals’ perceptions of risk have implications for whether and how they engage with protective strategies. This study investigated how sexual risk, specifically HIV and pregnancy and responsibility for these risks were constructed in discussions across five groups of youth in... -
Communication characteristics of young children with HIV in South Africa as reported by some physicians
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Michelle Hattam --- Con Amore School, South Africa Brenda Louw --- Department of Audiology and Speech-Language Pathology, United States Salome Geertsema --- Communication Pathology, South AfricaHIV has been shown to have significant effects on the development of a child. Currently, there is limited South African research regarding HIV and specific characteristics of communication development, and the treatment thereof, in the child infected with HIV. The... -
Teachability of collocations: The role of word frequency counts
Item type: Journal Article • Journal: Southern African Linguistics and Applied Language Studies • Authors: Déogratias Nizonkiza --- School of Languages, Potchefstroom Campus, Kris Van de Poel --- School of Languages, Potchefstroom Campus,This study aims to gain insights into which collocations to teach at which proficiency levels by answering the following questions: (i) Of the Verb+Noun and Adjective+Noun types of collocations, which one is more difficult (and should therefore come at a... -
Landscape, complicity and partitioned zones at South Africa Forest and Lubya in Israel-Palestine
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Heidi Grunebaum --- Centre for Humanities Research, South AfricaIn the historical and ideological contests of settler colonial conquest, the making of “landscape” out of land and territory is a powerful instrument in the visual and discursive constructions of nationalist perspectives. This article examines one such site, the Jewish... -
Yvette Christiansë's Oceanic Genealogies and the Colonial Archive: Castaways and Generations from Eastern Africa to the South Atlantic
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Meg Samuelson --- Department of English, South AfricaThis article traces tropes of dispersal and continuity in Yvette Christiansë oeuvre as it performs a genealogical enquiry through oceanic spaces and in and out of the colonial archive. Revolving respectively around St Helena and the Cape, both the poetry... -
Single parenting effects: resource access and coping of children in Swaziland
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: S'lungile K. Thwala --- Educational Foundations Department, Kayi Ntinda --- Educational Foundations Department, Ntombifuthi Mabuza --- Educational Foundations Department,This study investigated single parenting influences on the psychosocial development of children in Swaziland. Participants were a convenience sample of 24 students attending eight urban and rural schools (females = 54%; males =46%; age range 13–21). Data on experiences of single parenthood... -
Does estuarine health relate to catchment land-cover in the East Kleinemonde system, South Africa?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: VA Masefield --- Department of Geography, South Africa GK McGregor --- Department of Geography, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaTemporarily open/closed estuaries in South Africa are being subjected to varying degrees of catchment land-cover transformation. Natural landscapes and hydrological functions are integral to the functioning of estuaries. The relationship between catchment land-cover and the health of the East Kleinemonde... -
Seasonal variability of secondary production of cladocerans and rotifers, and their trophic role in Lake Tana, Ethiopia, a large, turbid, tropical highland lake
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Wondie --- Department of Fisheries, Wetlands and Wildlife, Faculty of Agriculture and Environment, Ethiopia S Mengistou --- Department of Zoological Sciences, EthiopiaDaily and annual production rates of eight cladoceran and two rotifer species, and their seasonal variation and trophic role in the large, turbid, tropical Lake Tana, Ethiopia, were assessed in 2003–2005. Laboratory cultures were used to infer cladoceran development times,... -
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... -
Assessing the suitability of commercial fisheries data for local-scale marine spatial planning in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Chalmers --- Department of Ichthyology and Fisheries Science, South Africa A Oosthuizen --- Park Planning and Development, South African National Parks, South Africa A Götz --- Department of Ichthyology and Fisheries Science, South Africa A Paterson --- South African Institute for Aquatic Biodiversity, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South AfricaThis study integrates fisheries logbook data with observer and vessel monitoring system (VMS) data in order to assess the accuracy of reported data and to develop high-resolution spatial data suitable for use in local-scale marine spatial planning analyses. Spatial assessments... -
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... -
Distribution of Lilian's Lovebirds in Malawi
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tiwonge I Mzumara --- School of Life Sciences, South Africa Michael R Perrin --- School of Life Sciences, South Africa Colleen T Downs --- School of Life Sciences, South AfricaLilian's Lovebird Agapornis lilianae is regarded as a mopane Colophospermum mopane woodland specialist. Its global population is sparse and is spread along the Zambezi valley with little known about its current distribution and status. We explored the current distribution of... -
Breeding ecology of the Seychelles Black Parrot Coracopsis barklyi
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Anna Reuleaux --- Seychelles Islands Foundation, Seychelles Heather Richards --- Seychelles Islands Foundation, Seychelles Terence Payet --- Seychelles Islands Foundation, Seychelles Pascal Villard --- Seychelles Islands Foundation, Seychelles Matthias Waltert --- Department of Conservation Biology, Germany Nancy Bunbury --- Seychelles Islands Foundation, SeychellesKnowledge of breeding ecology is required for many conservation interventions. The Seychelles Black Parrot Coracopsis barklyi, endemic to the island of Praslin, is vulnerable to extinction. We aimed to improve understanding of C. barklyi breeding ecology to aid conservation planning... -
Psychometric evaluation of the Basic Traits Inventory in the multilingual South African environment
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sonja Grobler --- Industrial and Organisational Psychology Department, College of Economic and Management Sciences, South Africa Marié de Beer --- Industrial and Organisational Psychology Department, College of Economic and Management Sciences, South AfricaThe objective of this study was to evaluate the psychometric properties of the BTI for all the official language groups in South Africa. Item bias analysis was performed by means of Rasch analysis for a sample of 105 342 respondents... -
Soil organic carbon and nitrogen stocks along a seasonal wetland (dambo) transect in central Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: George Nyamadzawo --- Department of Soil Science and Agricultural Engineering, Zimbabwe Menas Wuta --- Department of Soil Science and Agricultural Engineering, Zimbabwe Justice Nyamangara --- International Crops Research Institute for the Semi Arid Tropics, Matopos Research Station, Zimbabwe Philip Nyamugafata --- Department of Soil Science and Agricultural Engineering, ZimbabweEcosystems of central and southern Africa are occupied by some of the largest seasonal wetlands commonly called dambos. Dambos are likely to store huge stocks of soil organic carbon (SOC) because of their saturated conditions. However, most available literature report... -
Improving productivity and sustainability of successive rotations of Acacia auriculiformis plantations in South Vietnam
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Vu Dinh Huong --- Forest Science Institute of South Vietnam, Vietnam EK Sadanandan Nambiar --- CSIRO Land and Water Flagship, Australia Le Thanh Quang --- Forest Science Institute of South Vietnam, Vietnam Daniel S Mendham --- CSIRO Land and Water Flagship, Australia Pham The Dung --- Forest Science Institute of South Vietnam, VietnamWe studied the productivity of Acacia auriculiformis plantations in South Vietnam over three successive rotations covering 15 years. The focus of our study was on the effects of inter-rotation management on stand growth and soil properties. Contrastin g slash and... -
A new screening method for Ganoderma philippii tolerance in tropical Acacia species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Abdul Gafur --- AAA Group Research and Development, Indonesia Aswardi Nasution --- AAA Group Research and Development, Indonesia Muhammad Yuliarto --- AAA Group Research and Development, Indonesia Wong Ching Yong --- AAA Group Research and Development, Indonesia Mukesh Sharma --- AAA Group Research and Development, IndonesiaRed root rot disease caused by Ganoderma philippii is one of the most economically important diseases of tropical Acacia species. Research on field control of the disease has to date focused on inoculum reduction, silviculture practices and application of biological... -
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... -
The molluscicidal efficacy of methanol extracts of Pterocarpus angolensis, Sclerocarya birrea, Pappea capensis and Commiphora africana against Lymnaea natalensis and Helisoma duryi
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Ndabambi --- Department of Environmental Science and Health, Zimbabwe N Basopo --- Department of Applied Biology and Biochemistry, Zimbabwe LC Nkiwane --- Department of Textile Technology, Zimbabwe YS Naik --- Department of Environmental Science and Health, ZimbabweTropical plants have been shown to contain compounds that have some molluscicidal activity against snail intermediate hosts of parasitic trematodes. Dried methanol extracts of Pterocarpus angolensis, Sclerocarya birrea, Pappea capensis and Commiphora africana were screened for molluscicidal activity against Lymnaea... -
Who named it in anaesthesia?
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: AA Abraham --- Department of Anaesthesia, IndiaThe history of modern anaesthesia started on October 16, 1846 when WTG Morton demonstrated ether anaesthesia in Massachusetts General Hospital in USA. For about one month the new born branch of medicine was without a name. The word anaesthesia as... -
Seed removal by ants, birds and rodents in a woodland savanna habitat in Zimbabwe
Item type: Journal Article • Journal: African Zoology • Authors: Alicia V. Linzey --- Department of Biology, U.S.A. Kimberly A. Washok --- Department of Biology, U.S.A.Seed removal from bait stations was studied in miombo habitat in western Zimbabwe. Previous studies of seed predation in southern Africa have largely been conducted in desert ecosystems. However, this woodland-savanna habitat is more mesic and has relatively predictable rainfall... -
Age and growth of the estuarine-dependent sparid Acanthopagrus berda in northern KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: N. C. James --- Oceanographic Research Institute, South Africa B. Q. Mann --- Oceanographic Research Institute, South Africa L. E. Beckley --- Oceanographic Research Institute, South Africa A. Govender --- Oceanographic Research Institute, South AfricaAges were estimated for the tropical sparid, Acanthopagrus berda, caught in northern KwaZulu-Natal estuaries. Whole otoliths were used in the age determination. Age estimates were validated by marginal increment analysis and oxytetracycline labelling, which indicated that opaque deposition occurs primarily... -
Age, growth and reproduction of largemouth bass, Micropterus salmoides, in Lake Manyame, Zimbabwe
Item type: Journal Article • Journal: African Zoology • Authors: C.A. Beamish --- Department of Ichthyology and Fisheries Science, South Africa A.J. Booth --- Department of Ichthyology and Fisheries Science, South Africa N. Deacon --- Department of Ichthyology and Fisheries Science, South AfricaA total of 478 largemouth bass, Micropterus salmoides (Lacépède, 1802), was sampled between September 1997 and July 2001 using hook-and-line in Lake Manyame, a water supply reservoir situated outside Harare, Zimbabwe. Male fish dominated the samples, possibly an effect of... -
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... -
The effect of ungulate grazing on a small mammal community in southeastern Botswana
Item type: Journal Article • Journal: African Zoology • Authors: Eli R. Saetnan --- University of Illinois at Urbana-Champaign, U.S.A. Christina Skarpe --- Norwegian Institute for Nature Research, NorwayUngulates can reduce the quantity of food available for other herbivores in general or reduce the available cover for small mammals in particular. On the other hand, browsing and grazing may facilitate foraging by other mammals if the quality and... -
Effect of burn area on invertebrate recolonization in grasslands in the Drakensberg, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Charmaine Uys --- University of KwaZulu-Natal, South Africa Michelle Hamer --- University of KwaZulu-Natal, South Africa Robert Slotow --- University of KwaZulu-Natal, South AfricaOur study examined the short-term response of grassland invertebrate communities to fire in the South African Drakensberg, in relation to distance from the edge of a burn. We aimed to establish which species survive fire and the dynamics of the... -
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... -
Sexual size dimorphism in montane cordylid lizards: a case study of the dwarf crag lizard, Pseudocordylus nebulosus
Item type: Journal Article • Journal: African Zoology • Authors: Eloise Costandius --- Department of Botany & Zoology, South Africa P. le Fras N. Mouton --- Department of Botany & Zoology, South AfricaThe aim of this study was to provide information on sexual size dimorphism (SSD) in Pseudocordylus nebulosus and to discuss the observed variation in SSD among montane cordylids. Data for P. nebulosus were recorded in the Landdroskop area in the... -
Reproductive cycle of the Namaqua sand lizard, Pedioplanis namaquensis (Squamata: Lacertidae), from southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Stephen R. Goldberg --- Department of Biology, U.S.A.The reproductive cycle of the Namaqua sand lizard, Pedioplanis namaquensis, from southern Africa is described from histological examination of gonadal material from museum specimens. Males followed a seasonal testicular cycle in which sperm was produced in January–March and September–December. Testes... -
Moult in the Mediterranean monk seal from Cap Blanc, western Sahara
Item type: Journal Article • Journal: African Zoology • Authors: Enric Badosa --- Departament de Biologia Animal, Spain Teresa Pastor --- Departament de Biologia Animal, Spain Manel Gazo --- Departament de Biologia Animal, Spain Alex Aguilar --- Departament de Biologia Animal, SpainAt birth, the Mediterranean monk seal (Monachus monachus) is covered with dark lanugo This is shed earlier and faster in females, so they complete the moult when they are significantly younger (64 days) than males (82 days). Moulted pups present... -
Bird diversity and land use on the slopes of Mt Kilimanjaro and the adjacent plains, Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: Eija Soini --- World Agroforestry Centre (ICRAF), KenyaThis study of bird distribution in the main land-use categories of the slopes of Mt Kilimanjaro, Tanzania, aims at understanding potential impacts of the land-use changes on birds. A land-use map of the study area was derived from a Landsat... -
Aspects of the biology and ecology of the estuarine cirolanid isopod, Cirolana fluviatilis
Item type: Journal Article • Journal: African Zoology • Authors: Brent K. Newman --- Department of Zoology, South Africa Tristram H. Wooldridge --- Department of Zoology, South Africa Andy C. Cockcroft --- Department of Environmental Affairs and Tourism, Marine and Coastal Management Branch, South AfricaTrends in the distribution, population dynamics and reproductive biology of the estuarine cirolanid isopod, Cirolana fluviatilis, were investigated over a 12-month period in the warm–temperate Gamtoos River Estuary, by means of baited traps. Tolerance of adult isopods to combinations of... -
Preliminary observations on the diet of leopards (Panthera pardus) from a conservation area and adjacent rangelands in the Baviaanskloof region, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Theresia Ott --- Centre for African Conservation Ecology, Department of Zoology, South Africa Graham I. H. Kerley --- Centre for African Conservation Ecology, Department of Zoology, South Africa André F. Boshoff --- Centre for African Conservation Ecology, Department of Zoology, South AfricaPastoralists on rangelands adjacent to the Baviaanskloof Provincial Nature Reserve, Eastern Cape, report stock losses through predation by leopards (Panthera pardus). This leads, in certain cases, to persecution of the leopards. This study attempted to quantify livestock depredation by leopards... -
Potential of Metriaclima lanisticola (Teleostei: Cichlidae) for biological control of schistosome intermediate host snails
Item type: Journal Article • Journal: African Zoology • Authors: Mary Lundeba --- Aquaculture and Fisheries Science Department, Malawi Jeremy S. Likongwe --- Aquaculture and Fisheries Science Department, Malawi Henry Madsen --- DBL Center for Health Research and Development, Denmark Jay R. Stauffer --- School of Forest Resources, Penn State University, U.S.A.Metriaclima lanisticola, a native cichlid of Lake Malawi, was studied under laboratory conditions to evaluate its possible role as a predator of snails (Bulinus spp.). Bulinus globosus, B. nyassanus and B. tropicus were used as prey. B. globosus and B... -
Do Cape ground squirrels (Xerus inauris) discriminate between olfactory cues in the faeces of predators versus non-predators?
Item type: Journal Article • Journal: African Zoology • Authors: Lydia E. Belton --- Department of Zoology and Entomology, South Africa Nick Ball --- Department of Zoology and Entomology, South Africa Jane M. Waterman --- Department of Biology, U.S.A. Philip W. Bateman --- Department of Zoology and Entomology, South AfricaOne way to avoid potential predators is to be sensitive to odour cues, particularly those in faeces and urine, left by predators. This sensitivity has been demonstrated in many solitary, nocturnal, small mammals which may fall victim to ambush predators.We... -
Description of the tadpole of Amietia wittei (Anura: Pyxicephalidae) from the highlands of Kenya
Item type: Journal Article • Journal: African Zoology • Authors: Domnick Victor Wasonga --- National Museums of Kenya, Kenya Alan Channing --- University of the Western Cape, South AfricaThe tadpole of Amietia wittei (Anura: Pyxicephalidae) is described from the highlands of Kenya. It is distinguished from the tadpoles of Amietia ruwenzoriensis and A. angolensis in the region by the numbers of labial tooth rows. -
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... -
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... -
Small mammal diversity and density on the Bokkeveld escarpment, South Africa – implications for conservation and livestock predation
Item type: Journal Article • Journal: African Zoology • Authors: P. J. O‘Farrell --- Botany Department, South Africa J. S. Donaldson --- South African National Biodiversity Institute, South Africa M. T. Hoffman --- Botany Department, South Africa A. D. Mader --- South African National Biodiversity Institute, South AfricaA preliminary investigation of the diversity and density of small mammals in four structurally distinct habitat types in an actively-utilized farming landscape was carried out. We sought to understand how diversity and density are influenced by landscape structure, habitat structure... -
Faecal analysis suggests generalist diets in three species of Western Cape cordylids
Item type: Journal Article • Journal: African Zoology • Authors: S. Clusella-Trullas --- Department of Botany and Zoology, South Africa A. Botes --- Department of Botany and Zoology, South AfricaClimate has been proposed as an explanation for the present-day distribution of closely-related melanistic and non-melanistic cordylid species in the southwestern Cape of South Africa. However, diet may also contribute towards shaping geographic distributions. We present preliminary data on diet... -
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... -
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... -
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... -
Habitat preferences of three sympatric lacertid lizards in the arid Tankwa Karoo Basin of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: I. J. du Plessis --- Department of Botany and Zoology, South Africa P. le F. N. Mouton --- Department of Botany and Zoology, South AfricaFour lacertid lizards, Pedioplanis laticeps, P. lineo-ocellata, Meroles knoxii and Nucras tessellata, occur sympatrically on the arid plains of the Tankwa Karoo Basin in South Africa. The aim of this study was to determine whether the four species are spatially... -
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,... -
Are melanistic populations of the Karoo girdled lizard, Karusasaurus polyzonus, relics or ecotypes? A molecular investigation
Item type: Journal Article • Journal: African Zoology • Authors: Hanlie M. Engelbrecht --- Department of Botany and Zoology, South Africa P. le Fras N. Mouton --- Department of Botany and Zoology, South Africa Savel R. Daniels --- Department of Botany and Zoology, South AfricaIt has been proposed that melanism in cordylids evolved in response to a single climatic event and that melanistic populations of Karusasaurus polyzonus are relictual. This study investigates the genetic relationships of melanistic and non-melanistic populations of K. polyzonus along... -
Inshore occurrence of southern right whales (Eubalaena australis ) at Subantarctic Marion Island
Item type: Journal Article • Journal: African Zoology • Authors: M. Postma --- Department of Zoology and Entomology, South Africa M. Wege --- Department of Zoology and Entomology, South Africa M. N. Bester --- Department of Zoology and Entomology, South Africa D. S. van der Merwe --- Department of Zoology and Entomology, South Africa P. J. N. de Bruyn --- Department of Zoology and Entomology, South AfricaOpportunistic shore-based sightings of southern right whales Eubalaena australis for Marion Island (46°54’S, 37°45’E) were documented at five different times between 1974 and 2009. Whales were sighted between May and September and exclusively on the eastern lee side of the... -
Assessing local scale impacts of Opuntia stricta (Cactaceae) invasion on beetle and spider diversity in Kruger National Park, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: M.P. Robertson --- Centre for Invasion Biology, Department of Zoology and Entomology, South Africa K.R. Harris --- Centre for Invasion Biology, Department of Zoology and Entomology, South Africa J.A. Coetzee --- Department of Zoology and Entomology, South Africa L.C. Foxcroft --- Conservation Services, South African National Parks, South Africa A.S. Dippenaar-Schoeman --- Plant Protection Research Institute, Agricultural Research Council, South Africa B.J. van Rensburg --- Centre for Invasion Biology, Department of Zoology and Entomology, South AfricaThere is a paucity of studies examining direct impacts of introduced alien species on biodiversity, a key need for motivating for alien species control in conservation areas. The introduced prickly pear (Opuntia stricta) has invaded some 35 000 ha of... -
Do deterministic processes influence the phenotypic patterns of animalivorous bat ensembles at urban rivers?
Item type: Journal Article • Journal: African Zoology • Authors: M. Corrie Schoeman --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, Westville Campus, South Africa Kirby J. Waddington --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, Westville Campus, South AfricaAlthough urbanization is perhaps the most damaging, persistent, and rapidly expanding form of anthropogenic pressure on natural ecosystems, data on the patterns and processes of sympatric bat species in urban landscapes are relatively scant. We quantified the packing and dispersion... -
Differences in diet between two rodent species, Mastomys natalensis and Gerbilliscus vicinus, in fallow land habitats in central Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: Loth S. Mulungu --- Pest Management Centre, Sokoine University of Agriculture, Apia W. Massawe --- Pest Management Centre, Sokoine University of Agriculture, Jan Kennis --- University of Antwerp, Evolutionary Ecology Group, Belgium Dieter Crauwels --- University of Antwerp, Evolutionary Ecology Group, Belgium Seth Eiseb --- National Museum of Namibia, Namibia Themb’alilahlwa A. Mahlaba --- Department of Biological Sciences, Swaziland Ara Monadjem --- Department of Biological Sciences, Swaziland Rhodes H. Makundi --- Pest Management Centre, Sokoine University of Agriculture, Abdul A.S. Katakweba --- Pest Management Centre, Sokoine University of Agriculture, Herwig Leirs --- University of Antwerp, Evolutionary Ecology Group, Belgium Steven R. Belmain --- Natural Resources Institute, University of Greenwich, U.K.Differences in the ecological niche requirements among rodent species competing in the same habitat may result from differences in the use of one to three resources: space, time and food or some combination of these. Alternatively, differences in resource use... -
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... -
Foraging strategies of coexisting lacertid lizards in the arid Tankwa Karoo Basin of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: I.J. du Plessis --- Department of Botany and Zoology, South Africa P. le F.N. Mouton --- Department of Botany and Zoology, South AfricaFour lacertid lizards, Pedioplanis laticeps, P. lineo-ocellata, Meroles knoxii and Nucras tessellata, occur sympatrically on the arid plains of the Tankwa Karoo Basin in South Africa. The aim of this study was to evaluate the significance of foraging strategy in... -
Freshwater invertebrates of sub-Antarctic Marion Island
Item type: Journal Article • Journal: African Zoology • Authors: Herbert J.G. Dartnall --- Department of Biological Sciences, Australia Valdon R. Smith --- Department of Botany and Zoology, South AfricaThe freshwater habitats (mires, streams, lakes, pools and wallows) on sub-Antarctic Marion Island were examined for invertebrates. Sixty-eight species were found, including 45 new records for the Island. Of these 56 were bona fide aquatic invertebrates, the rest being terrestrial... -
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... -
The phylogeography of Lemniscomys striatus (Rodentia: Muridae) confirms a remarkable vicariant event in neighbouring savanna populations in Central Gabon
Item type: Journal Article • Journal: African Zoology • Authors: J. F. Mboumba --- Université des Sciences et Techniques de Masuku, Gabon V. Nicolas --- Muséum National d’Histoire Naturelle, Département de Systématique et Evolution, France M. Colyn --- Université de Rennes 1, France P. Deleporte --- Université de Rennes 1, FranceOur recent phylogeographic study on the strictly savanna small rodent Nannomys minutoides revealed an unexpected pattern of divergence between populations occupying neighbouring savanna islands in Central Gabon, suggesting the historical and continuing fragmentation of these savanna habitats. In this study,... -
Residency and small-scale movement behaviour of three endemic sparid fishes in their shallow rocky subtidal nursery habitat, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Peter A. Watt-Pringle --- Department of Ichthyology and Fisheries Science, Rhodes University, South Africa Paul D. Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa Albrecht Götz --- Elwandle Node, South African Environmental Observation Network (SAEON), South AfricaThe residency and small-scale movements of early juveniles (<175 mm fork length) of three sparid fish species were examined in the shallow subtidal zone along a 500 m stretch of rocky coastline near Schoenmakerskop (Eastern Cape Province, South Africa). A... -
Is a reduction in the individual vigilance of mothers a key evolutionary driver of group formation in white rhinos?
Item type: Journal Article • Journal: African Zoology • Authors: Adrian M. Shrader --- School of Life Sciences, University of KwaZulu-Natal, South Africa Julie F. Post --- Department of Zoology & Entomology, South Africa Nicole Hagenah --- School of Life Sciences, University of KwaZulu-Natal, South Africa Philip W. Bateman --- Department of Environment and Agriculture, Western AustraliaA key benefit and evolutionary driver of group living is reduced predation risk. In white rhinos, groups comprise adult females, their calves and one to six unrelated subadults. Subadults benefit from group living through exposure to novel areas, and protection... -
Grassland bird response to vegetation structural heterogeneity and clearing of invasive bramble
Item type: Journal Article • Journal: African Zoology • Authors: Chevonne Reynolds --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa Craig T. Symes --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South AfricaSpatial and temporal patterns of disturbance and the subsequent heterogeneity are critical in maintaining biodiversity within grassland ecosystems. Grassland birds have evolved within this ‘shifting mosaic’ to become reliant on specific habitat characteristics maintained under varying levels of both natural... -
In situ growth rate of Solen cylindraceus (Mollusca: Euheterodonta: Solenidae) in the St Lucia estuarine lake, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Holly A. Nel --- University of KwaZulu-Natal, Westville Campus, South Africa Renzo Perissinotto --- University of KwaZulu-Natal, Westville Campus, South Africa Ricky H. Taylor --- University of KwaZulu-Natal, Westville Campus, South AfricaSolen cylindraceus, an infaunal bivalve, can reach a maximum length of 95 mm. However, in the St Lucia estuarine system specimens are seldom larger than 55 mm. Thus, the primary aim of this study was to investigate the growth rate... -
Breeding density of the southern ground hornbill, Bucorvus leadbeateri, in the communal areas surrounding the Matobo National Park, Zimbabwe
Item type: Journal Article • Journal: African Zoology • Authors: Minke Witteveen --- University of KwaZulu-Natal, South Africa Elspeth Parry --- , South Africa Mark Norris-Rogers --- School of Agricultural, Earth and Environmental Sciences, University of KwaZulu-Natal, South Africa Mark Brown --- University of KwaZulu-Natal, South AfricaThe southern ground hornbill, Bucorvus leadbeateri, is on the IUCN Red List of Threatened Species as a ‘Vulnerable’ species with a decreasing population. Despite a myriad of threats, including loss of nesting sites, accidental poisoning and persecution, there has been... -
Life-history characteristics of an age-validated established invasive African sharptooth catfish, Clarias gariepinus, population in a warm–temperate African impoundment
Item type: Journal Article • Journal: African Zoology • Authors: Reece Wartenberg --- Department of Ichthyology and Fisheries Science, South Africa Olaf L. F. Weyl --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa Anthony J. Booth --- Department of Ichthyology and Fisheries Science, South Africa Henning Winker --- University of Cape Town, South AfricaIt has been suggested that the invasive, omnivorous Clarias garipienus is capable of rapid invasions and long-term persistence in recently inhabited freshwater systems. To test this hypothesis, the life history of the established, extralimital Darlington Dam (33°10’31”S, 25°09’13”E) population was... -
Climate and the evolution of group-living behaviour in the armadillo lizard (Ouroborus cataphractus)
Item type: Journal Article • Journal: African Zoology • Authors: Cindy Shuttleworth --- Department of Botany and Zoology, South Africa P. le Fras N. Mouton --- Department of Botany and Zoology, South Africa Adriaan van Niekerk --- Department of Geography and Environmental Studies, South AfricaWe evaluated the hypothesis that the regular use of the southern harvester termite, Microhodotermes viator, as food source by the armadillo lizard, Ouroborus cataphractus, originated as an adaptation to survive the summer dry season in a climatic regime where rainfall... -
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... -
An example of burrow system architecture of dispersing Damaraland mole-rats
Item type: Journal Article • Journal: African Zoology • Authors: Cornelia Voigt --- Department of Zoology and Entomology, South AfricaThe Damaraland mole-rat (Fukomys damarensis) is a social, subterranean rodent that occurs in the red Kalahari sands. This species exhibits extreme reproductive skew with a single breeding female whereas reproduction in subordinate group members is completely blocked. Rainfall, as it... -
Meso-zooplankton movement through the newly constructed Mfolozi channel into and out of the St Lucia Estuary, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Sean van Elden --- School of Life Sciences, University of KwaZulu-Natal, Westville Campus, South Africa Michael J. Dyer --- School of Life Sciences, University of KwaZulu-Natal, Westville Campus, South Africa Nicola K. Carrasco --- School of Life Sciences, University of KwaZulu-Natal, Westville Campus, South Africa Renzo Perissinotto --- School of Life Sciences, University of KwaZulu-Natal, Westville Campus, South AfricaThe historical canalization of the Mfolozi River resulted in the St Lucia Estuary losing its main freshwater source. This, combined with the recent drought, led to low water levels, hypersaline conditions and dramatic losses in biodiversity. The excavation of a... -
Spatial distribution and community structure of phytoplankton, ciliates and zooplankton coupled to environmental factors in the Sousse saltern (Sahel of Tunisia)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Ghannay --- Faculté des Sciences de Sfax, Tunisia H Khemakhem --- Faculté des Sciences de Sfax, Tunisia H Ayadi --- Faculté des Sciences de Sfax, Tunisia J Elloumi --- Faculté des Sciences de Sfax, TunisiaThe composition and distribution of the main planktonic halophilic microorganisms were studied in 12 ponds of different salinity levels, ranging from 38 to 328, in the saltern of Sousse, Tunisia, in relation to environmental factors. Nutrient concentrations increased with decreasing... -
Reducing the overall HIV-burden in South Africa: is ‘reviving ABC’ an appropriate fit for a complex, adaptive epidemiological HIV landscape?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Christopher J Burman --- The Rural Development and Innovation Hub, South Africa Marota Aphane --- The Rural Development and Innovation Hub, South Africa Peter Delobelle --- School of Public Health, South AfricaThis article questions the recommendations to ‘revive ABC (abstain, be faithful, condomise)’ as a mechanism to ‘educate’ people in South Africa about HIV prevention as the South African National HIV Prevalence, Incidence and Behaviour Survey, 2012, suggests. We argue that... -
Grazing depletes forb species diversity in the mesic grasslands of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Rob Scott-Shaw --- Ezemvelo KZN Wildlife, South Africa Craig D Morris --- Agricultural Research Council–Animal Production Institute, South AfricaForbs constitute over 80% of the species richness of mesic grassland but their response to grazing is largely unknown. The influence of grazing on the forb composition, richness and diversity of two species-rich grasslands in the coastal hinterland and midlands... -
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... -
The role of reproduction in Glyceria maxima invasion
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lutendo F Mugwedi --- Agricultural Research Council–Plant Protection Research Institute, South Africa Jeremy Goodall --- Agricultural Research Council–Plant Protection Research Institute, South Africa Edward TF Witkowski --- School of Animal, Plant and Environmental Sciences, South Africa Marcus J Byrne --- School of Animal, Plant and Environmental Sciences, South AfricaGlyceria maxima (Poaceae) is regarded as one of the most invasive grasses worldwide, but has only recently become naturalised in South Africa after its intentional introduction as a fodder crop in the 1940s. It invades seasonally inundated habitats. The primary... -
Modelling annual evapotranspiration in a semi-arid, African savanna: functional convergence theory, MODIS LAI and the Penman–Monteith equation
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anthony R Palmer --- Centre for African Conservation Ecology, South Africa Craig Weideman --- Department of Environmental Science, South Africa Andiswa Finca --- Agricultural Research Council–Animal Production Institute, South Africa Colin S Everson --- Bioresources Engineering and Environmental Hydrology, South Africa Niall Hanan --- Geospatial Science Center of Excellence, USA William Ellery --- Department of Environmental Science, South AfricaAccurately measuring evapotranspiration (ET) is essential if we are to derive reasonable estimates of production and water use for semi-arid savannas. Estimates of ET are also important in defining the health of an ecosystem and the quantity of water used... -
Predation drives nesting success in moist highland grasslands: the importance of maintaining vegetation cover for bird conservation
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ian T Little --- 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 Africa Raymond Jansen --- Department of Environmental, Water and Earth Sciences, South AfricaBy focusing on process-oriented data rather than inventory-type data, this study provides a robust understanding of the effects of agricultural management on grassland bird reproductive output in the moist highland grasslands (MHGs) of South Africa. Four-hundred and four nests of... -
Blue Petrels Halobaena caerulea discovered breeding on Gough Island
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Peter G Ryan --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Ben J Dilley --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Christopher Jones --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Alexander L Bond --- RSPB Centre for Conservation Science, UKThe Blue Petrel Halobaena caerulea breeds at five subantarctic island groups and at islands off southern Chile in a narrow latitudinal band from 47° to 56° S on either side of the Antarctic Polar Front. We found a colony on... -
Can behaviour buffer the impacts of climate change on an arid-zone bird?
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Susan J Cunningham --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Rowan O Martin --- 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 AfricaBehavioural thermoregulation, particularly the use of cool microclimates, is one method by which organisms could avoid the worst effects of climate warming. However, retreat into cool microsites, e.g. shady vegetation or burrows, may carry important lost-opportunity costs. These could include... -
Elevated temperatures drive fine-scale patterns of habitat use in a savanna bird community
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Rowan O Martin --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Susan J Cunningham --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- ,Many animals use thermally buffered microhabitats, e.g. patches of shade within trees, to avoid temperature extremes. These ‘thermal refugia’ may mediate the impact of climate change on animals. Predicting how species and communities will respond to rising temperatures therefore requires... -
Movement ecology of five Afrotropical waterfowl species from Malawi, Mali and Nigeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: John Y Takekawa --- US Geological Survey, USA Shane R Heath --- US Geological Survey, USA Samuel A Iverson --- US Geological Survey, USA Nicolas Gaidet --- CIRAD, UPR AGIRs, Campus international de Baillarguet, France Julien Cappelle --- CIRAD, UPR AGIRs, Campus international de Baillarguet, France Tim Dodman --- Hundland, UK Ward Hagemeijer --- Wetlands International, The Netherlands William D Eldridge --- US Fish and Wildlife Service, USA Scott A Petrie --- Long Point Waterfowl, Canada Gregory S Yarris --- US Geological Survey, USA Shiiwua Manu --- AP Levantis Ornithological Research Institute, Nigeria Glenn H Olsen --- US Geological Survey, USA Diann J Prosser --- US Geological Survey, USA Kyle A Spragens --- US Geological Survey, USA David C Douglas --- US Geological Survey, USA Scott H Newman --- Food and Agriculture Organization of the United Nations, VietnamHabitat availability for Afrotropical waterbirds is highly dynamic with unpredictable rainfall patterns and ephemeral wetlands resulting in diverse movement strategies among different species. Movement strategies among waterfowl encompass resident, regional and intercontinental migrants, but little quantitative information exists on their... -
A visual analysis of a cultural tourism destination
Item type: Journal Article • Journal: • Authors: Klaes Eringa and Shenghan Zhou --- Stenden Hotel Management School, Stenden University of Applied Sciences, Leeuwarden, The NetherlandsThis research investigates how a relatively unknown town that is elected as cultural capital of Europe can use visual materials to attract visitors from totally different areas in the world, particularly China. The study uses visual cues for two purposes:... -
A preliminary study of South African consumers’ knowledge of and their attitudes towards using indigenous ornamentals in horticultural applications
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lorraine Middleton --- Department of Biology, South AfricaCrucial aspects related to the knowledge levels and attitudes of South African consumers in the formal commercial sector regarding the horticultural uses of ornamental plants in general, and indigenous plants in particular, were evaluated. The findings showed that consumer behaviour... -
Crop model usefulness in drylands of southern Africa: an application of DSSAT
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Nkulumo Zinyengere --- Climate System Analysis Group, Department of Environmental and Geographical Science, South Africa Olivier Crespo --- Climate System Analysis Group, Department of Environmental and Geographical Science, South Africa Sepo Hachigonta --- Food Agriculture and Natural Resources Policy Analysis Network, South Africa Mark Tadross --- United Nations Development Programme – Global Environment Facility, South AfricaCrop models are useful tools for simulating impacts of climate and agricultural practices on crops. Models have to demonstrate the ability to simulate actual crop growth response in particular environments before application. Data limitations in southern Africa frequently hinder adequate... -
Mangrove expansion and population structure at a planted site, East London, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sabine CL Hoppe-Speer --- Department of Botany, South Africa Janine B Adams --- Department of Botany, South Africa Anusha Rajkaran --- Department of Botany, South AfricaAvicennia marina (Forrsk.) Vierh. was planted in 1969 at Nahoon Estuary, East London, followed a few years later by the planting of Bruguiera gymnorrhiza (L.) Lam. and Rhizophora mucronata (L.) among the larger A. marina trees. This study tested the... -
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... -
Aspects of the predictive and explanatory power of value added information in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: C J van Staden --- Department of Accountancy and Business Law, New ZealandIn this paper the predictive and explanatory power of value added information was investigated with regards to three external indicators by doing statistical analysis on empirical data of South African listed companies. The analysis indicated that value added information did... -
The appropriateness of performance measurement in the service sector: A case study
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: K Sartorius --- School of Accountancy, C Eitzen --- School of Accountancy, C Nicholson --- School of Accountancy,The development of performance measures in service companies has not kept abreast with their manufacturing counterparts despite the unprecedented growth of this sector in recent decades. The objective of this paper is to contribute towards a better understanding of the... -
Portfolio rebalancing in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: G Sher --- Department of Actuarial Science, G D I Barr --- Department of Economics and Statistical Sciences,The theory of so-called ‘optimal’ portfolio rebalancing has emerged over the last decade in journals and working papers, but this theory has several drawbacks, being based on advanced mathematics and relying on sets of restrictive assumptions. This paper investigates rebalancing... -
A Note: The SAICA Part I Qualifying Examinations: Factors that may influence candidates’ success
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: E van Wyk --- Department of Accountancy,The study investigates certain factors characterising successful and unsuccessful candidates in the 2009 and 2010 SAICA Part I Qualifying Examination (QE I) with the purpose of making recommendations to candidates, educators, training centres and to SAICA. The study also aims... -
A comment on “Portfolio rebalancing in South Africa”
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: David Bradfield --- Department of Statistical Sciences, South Africa Graham Barr --- Department of Economics and Department of Statistical Sciences, South AfricaIn this comment we add to the discussion on rebalancing portfolios by Sher and Barr (2011). In particular we highlight how a recent rebalancing proposal by Chan and Ramkumar (2011) is found to significantly improve rebalancing performance. An important feature... -
Convergence to market efficiency: the case of seasoned equity offering stocks
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Han-Ching Huang --- Department of Finance, Business Building 404A, 4/F, Taiwan Yong-Chern Su --- Department of Finance, Taiwan Hsuan-Yin Wang --- Department of Finance, TaiwanThis study examines the relationship between returns and contemporaneous and lagged-order imbalances by regression analysis. Conditional on contemporaneous imbalances, a significantly negative relationship is found between lagged-one imbalances and returns, except for a 10-minute time interval. This suggests that seasoned... -
Essensiële agtergrondkennis van die konsepsuele raamwerk: ’n Opvallende leemte in die Ovkom-leerplan
Item type: Journal Article • Journal: De Ratione • Authors: E. Saenger --- Universiteit van Suid-Afrika, -
A Multi-directional model for identifying information system opportunities
Item type: Journal Article • Journal: De Ratione • Authors: P.M.Q. Lay --- University of Cape Town,Information Technology has a pervasive influence in business, from supporting the operations of the organization, to making a significant contribution to the competitive strategy of the enterprise. Identifying new opportunities for IT support is a major aspect of planning for... -
Planning to recover from the loss of computer facilities
Trends in South Africa over the last five years Item type: Journal Article • Journal: De Ratione • Authors: J. Miller --- Graduate School of Business, M. A. Wenham --- Graduate School of Business,A national survey of computer disaster recovery planning by major computer users in South Africa was conducted in 1990. The results are reported in this article and show that most firms are highly dependent on their computer systems. Almost a... -
A postmodern perspective on the scientific status of accounting: A research note
Item type: Journal Article • Journal: De Ratione • Authors: Arline A Savage --- Faculty of Business of the University of New Brunswick Saint John,This research note contributes to the discussion about the scientific status of accounting by contrasting Thomas Kuhn’s modem approach to science with Jean-Francois Lyotard’s postmodern perspective for the current situation regarding knowledge in advanced societies, which he describes as language... -
The moving finger: Asian international hotel school students developing English language writing skills
Item type: Journal Article • Journal: • Authors: Peter Graham --- Stenden Rangsit University, Rattanakunakorn Building, 52/347 Muang Ake, Phaholyothin Road, Lak-Hok, Pathumthani, Bangkok, ThailandThe number of international English as a Second Language hospitality students completing their degree programs in Australasia has risen dramatically in the past decade. One factor that may be motivating students to undertake tertiary studies in Australasia is the expectation... -
Sustainable intensification of cultivated pastures using multiple herbivore species
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: James P Muir --- Texas A&M AgriLife Research, USA William D Pitman --- Louisiana State University Agricultural Center, USA Jamie L Foster --- Texas A&M AgriLife Research, USA José C Dubeux --- North Florida Research and Education Center, USADemand for animal products is growing faster than for any other agricultural product. As a result, pressure for greater output from cultivated pastures is expected to increase. Assuming cultivated pasture area will decrease with land degradation, conversion to grain crops... -
Grazing capacity, milk production and milk composition of kikuyu over-sown with annual or perennial ryegrass
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Janke van der Colf --- Western Cape Department of Agriculture, South Africa Philip R Botha --- Western Cape Department of Agriculture, South Africa Robin Meeske --- Western Cape Department of Agriculture, South Africa Wayne F Truter --- Department of Plant Production and Soil Science, South AfricaKikuyu (Pennisetum clandestinum) is a highly productive pasture species that supports high stocking rates and milk production per hectare, but production per cow is low due to low nutritive value. The aim of this study was to determine the grazing... -
Productivity evaluation of Medicago sativa cultivars under irrigation in a semi-arid climate
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Johann F Theron --- Free State Department of Agriculture, South Africa Hennie A Snyman --- Department of Animal, Wildlife and Grassland Sciences, South AfricaMany Medicago sativa cultivars are available in South Africa, each with unique characteristics. This study evaluated 26 cultivars under irrigation on two ecotopes in terms of number of cuttings, dry matter (DM) production, seasonal DM production curve, DM production curve... -
Severe neuropathy due to inhalant abuse in adolescents from Pretoria
Item type: Journal Article • Journal: South African Family Practice • Authors: Clara Maria Schutte --- Department of Neurology, South Africa Jayendra Naidoo --- Department of Neurology, South Africa Mandisa Kakaza --- Department of Neurology, South Africa Manesh Pillay --- Department of Neurology, South Africa Juliane Hiesgen --- Department of Neurology, South AfricaInhalation of volatile agents, or solvent abuse, is a dangerous pastime practised by many young adolescents in various parts of the world. Benzine, a distillate of petroleum, is a cheap and readily available solvent that is often inhaled or “sniffed”... -
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... -
The epistemology of AIDS in South Africa: lessons from three scenario projects
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Charl Swart --- School of Public Health, South Africa Pieter Fourie --- Department of Political Science, South AfricaThis article reviews the methodology of future scenario-building in the context of HIV and AIDS in Africa. It considers three scenario studies conducted in the past decade: UNAIDS (2005), Metropolitan Holdings (2006) and the AIDS Governance scenarios (2015). The article... -
Spatial pattern and determinants of unmet need of family planning in Nigeria
Item type: Journal Article • Journal: South African Family Practice • Authors: Oluwayemisi Oyeronke Alaba --- Department of Statistics, Nigeria JO Olaomi --- Department of Statistics, South Africa Olusanya E. Olubusoye --- Department of Statistics, NigeriaBackground: Nigeria still grapples with low family planning (FP) use and a high fertility rate. This study explores the factors associated with the unmet need for FP and the coldspots of unmet need for FP in Nigeria. -
Effect of Planting Material and Variety on Productivity and Survival of Napier Grass (pennisetum purpureum schumach) in the Coastal Lowlands of Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: A. Ramadhan --- Kenya Agricultural Research Institute, Kenya M. N. Njunie --- Kenya Agricultural Research Institute, Kenya K. K. Lewa --- Kenya Agricultural Research Institute, KenyaA study to determine a suitable planting method for multiplication of planting materials of Napier grass varieties was done at the Kenya Agricultural Research Institute (KARI) Msabaha in coastal lowland (CL) agro-ecological zone 4 (CL4). The experimental design was split-plot... -
Factors Influencing the Adoption of International Financial Reporting Standards by African Countries
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: L J Stainbank --- University of KwaZulu-Natal,The purpose of this paper is to identify the factors which may influence the adoption of the International Financial Reporting Standards (IFRS) by African countries. Using previous literature, the following factors were identified: economic growth, education level, economic openness, culture... -
Visual obstruction as a method to quantify herbaceous biomass in southern African semi-arid savannas
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Dave Joubert --- Polytechnic of Namibia, Namibia Larkin A Powell --- School of Natural Resources, USA Walter H Schacht --- Department of Agronomy and Horticulture, USABiomass of aboveground vegetation is a useful descriptor for studies of grazing, fire and wildlife habitat use in grassland systems. The traditional method to estimate biomass, hand-clipping, is time intensive and other indices of biomass have been used successfully. In... -
Prospects for extirpating small populations of the wetland invader Melaleuca quinquenervia from South Africa: a case study from the Western Cape region
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: E van Wyk --- Invasive Species Programme, South Africa LEO Jacobs --- Invasive Species Programme, South AfricaThe broad-leaved paper bark tree Melaleuca quinquenervia is a major invader in the wetlands of the Florida Everglades, USA. In South Africa, this introduced species is known from eight locality records and is naturalising at two of these sites. The... -
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... -
Land is for people—experiences of the community of Khuis
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: PA Erasmus --- Department of Anthropology,This study is an investigation into the social history of the Tlharo, with the aim of articulating and clarifying the particular nature of their experiences in respect of land-related issues. Their circumstances are described against the background of the course... -
Spatial and organisational complexity in the Dwars River Valley, Western Cape
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: C. S. van der Waal --- Department of Sociology and Social Anthropology,Access to land and housing in South Africa is of great importance to a range of actors, leading to contested processes and complex organisational interactions. Using the anthropology of organisations and a process ethnographic approach, the spatial and organisational complexity... -
The roots and complexity of the land issue and of land claims in South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: FC de Beer --- Department of Anthropology and Archaeology,Land reform and land restitution are current and emotional issues in South Africa and a scrutiny of the antecedent events and processes is crucial for an understanding of the complexities involved. Comprehending the land issue requires a reflection on the... -
‘I have plans’. Scrutinising the meaning, production and sustaining of hope in safe sexual practices among young men in Khayelitsha, Cape Town
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Diana Gibson --- Department of Anthropology and Sociology, Krishnavelli Nadasen --- Department of Anthropology and Sociology,This paper scrutinises hope from an anthropological perspective and in a South African setting. While public, theological and other discourses have attended to hope, anthropologists in South Africa have not done so and the paper aims to highlight it as... -
Locating community participation in a water supply project—the Galanefhi Water Project (Eritrea)
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Solomon Haile Gebremedhin --- Department of Economic Development, Central Region, Eritrea Francois Theron --- School of Public Management and Planning, University of Stellenbosch,Water projects, like sustainable development projects in general, often tend to become unsustainable because they are guided by top-down strategies which exclude the input, influence and ownership of projects by their beneficiaries. For attaining sustainable development, the social capital of... -
Koranna struggle against the colonial church: the case of Brandewynsfontein
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Piet Erasmus --- Department of Anthropology,Although Goliath Yzerbek, in his struggle to safeguard the perceived land rights of the Koranna, had to deal with many more obstacles than the colonial church, only the interactions of the Berlin Missionary Society with the Koranna of Brandewynsfontein will... -
Cattle and cattle colour terminology in South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Louis J Louwrens --- Department of African Languages, Elsabé Taljard --- Department of African Languages,A comparison between cattle colour terminology found in the Khoikhoi languages and that found in South African Bantu languages brings noticeable similarities to light, leading to the assumption that both the cattle and the terms used to describe their characteristic... -
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... -
Title: between N!a†xam and tibi. A case study of tuberculosis and the Ju/'hoansi in the Tsumkwe region, Namibia
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Diana Gibson --- Department of Anthropology and Sociology, Estelle Oosthuysen --- , NamibiaIn academic literature and the media, knowledge of the Ju/'hoansi San of Namibia is often either valorised or problematised. In this case study of tuberculosis in a small village in Tsumkwe district, which we call Dune and Low Dune, all... -
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... -
Memory, landscape and event: How Ndebele labour tenants interpret and reclaim the past
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Chris J van Vuuren --- Department of Anthropology and Archaeology,The article discusses the roots of memory of former Ndebele labour tenants, and how these memories manifest in landscape, object and event. Recognising the role of history that bound most of the Ndundza community into labour tenancy, the author unpacks... -
Rural people's perceptions of wildlife conservation—the case of the Masebe Nature Reserve in Limpopo Province, South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Chris Boonzaaier --- Department of Anthropology & Archaeology,The First World rationale for nature conservation is usually the aesthetic and recreational experiences and opportunities that nature provides and its scientific importance, but rural populations in Africa tend to focus on the utilisation of natural resources. This paper argues... -
Liminoid religion: Ritual practice in alternative spirituality in the Netherlands
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: P.G.A. Versteeg --- VISOR/Faculty of Theology, The NetherlandsAlternative spirituality can be seen as a particular form of religious practice related to processes of de-traditionalisation and deinstitutionalisation. Although often regarded as a western, secularised phenomenon, such alternative forms of spirituality are becoming increasingly popular among the middle classes... -
Street name-changes, abjection and private toponymy in Potchefstroom, South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Andre Goodrich --- North-West University (NWU), South Africa Pia Bombardella --- North-West University (NWU), South AfricaIn 2008, many residents of what was then Van Riebeeck Street in the small city of Potchefstroom in South Africa defied the city council's renaming it Peter Mokaba Avenue by erecting replica Van Riebeeck Street signs on their private property... -
Responding to the crisis: food co-operatives and the solidarity economy in Greece
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Theodoros Rakopoulos --- The Human Economy Project, Faculty of Humanities, South AfricaThis article discusses a case of popular social response to imposed austerity and recession in Greece. It focuses on the anti-middleman movement in an Athens suburb. It also addresses the broader picture of the current Greek crisis, explaining how participants... -
Towards a human economy: reflections on a new project
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: John Sharp --- Department of Anthropology and Archaeology, South AfricaThe University of Pretoria's Human Economy project began at the end of 2010. To date it has involved eighteen post-doctoral fellows, drawn from around the world, and eight doctoral candidates, all from Africa. This paper reviews the project's progress, drawing... -
Modelling primary branch growth based on a multilevel nonlinear mixed‑effects model: a Pinus koraiensis plantation case study in north‑east China
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Lingbo Dong --- Department of Forest Management, College of Forestry, China Zhaogang Liu --- Department of Forest Management, College of Forestry, China Fengri Li --- Department of Forest Management, College of Forestry, China Lichun Jiang --- Department of Forest Management, College of Forestry, ChinaOn the basis of a multilevel nonlinear mixed‑effects model approach, branch diameter and length growth models were developed for a Pinus koraiensis plantation in north‑east China. The models developed were able to better capture the residual variation successfully by partitioning... -
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... -
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... -
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,... -
Spatial and seasonal patterns of European short-snouted seahorse Hippocampus hippocampus distribution in island coastal environments
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Otero-Ferrer --- Grupo de Investigación en Acuicultura, Spain R Herrera --- Dirección General de Ordenación del Territorio, Spain VM Tuset --- Instituto de Ciéncias del Mar (CSIC), Spain J Socorro --- Grupo de Investigación en Acuicultura, Spain L Molina --- Grupo de Investigación en Acuicultura, SpainThis study represents the first report on seahorses in the Macaronesian islands (North-East Atlantic), determining the spatial and seasonal abundance, population structure and physical appearance of European short-snouted seahorse Hippocampus hippocampus. Animals were surveyed off Gran Canaria Island in two... -
Insights into the diet of a poorly known species: pygmy killer whale Feresa attenuata from Cape Verde, West Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PR O'Dwyer --- Marine Biodiversity Research Group, Ireland S Berrow --- Marine Biodiversity Research Group, Ireland P López-Suárez --- Bios, C Oujo Lamao --- Bios,Despite having a worldwide distribution in tropical waters, knowledge on pygmy killer whales Feresa attenuata, including diet, is poor, with only a few studies carried out to date. The presence of otoliths and beaks in stomachs that have been examined... -
The half-yellow man
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: BJ Merwitz --- Faculty of Health Sciences, Carbohydrate and Lipid Metabolism Research Unit, South Africa FJ Raal --- Faculty of Health Sciences, Carbohydrate and Lipid Metabolism Research Unit, South Africa -
Antimicrobial Susceptibility Patterns of Selected Bacteraemic Isolates from South African Public Sector Hospitals, 2010
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: C Bamford --- National Health Laboratory Service (NHLS), Groote Schuur and University of Cape Town, K Bonorchis --- National Health Laboratory Service (NHLS), Green Point and University of Cape Town, A Ryan --- National Health Laboratory Service (NHLS), Green Point and University of Cape Town, J Simpson --- National Health Laboratory Service (NHLS), Green Point and University of Cape Town, E Elliott --- National Health Laboratory Service (NHLS), Universitas and University of the Free State, R Hoffmann --- National Health Laboratory Service (NHLS), Tygerberg and Stellenbosch University, P Naicker --- National Health Laboratory Service (NHLS), Tygerberg and Stellenbosch University, N Ismail --- National Health Laboratory Service (NHLS), Steve Biko Academic and University of Pretoria, N Mbelle --- National Health Laboratory Service (NHLS), Dr George Mukhari and University of Limpopo, M Nchabeleng --- National Health Laboratory Service (NHLS), Dr George Mukhari and University of Limpopo, T Nana --- National Health Laboratory Service (NHLS), Charlotte Maxeke Johannesburg Academic and University of the Witwatersrand, C Sriruttan --- National Health Laboratory Service (NHLS), Charlotte Maxeke Johannesburg Academic and University of the Witwatersrand, S Seetharam --- National Health Laboratory Service (NHLS), Chris Hani Baragwanath and University of the Witwatersrand, J Wadula --- National Health Laboratory Service (NHLS), Chris Hani Baragwanath and University of the Witwatersrand,We report on antimicrobial susceptibility surveillance data for six key bloodstream pathogens (Escherichia coli, Klebsiella pneumoniae, Enterobacter spp., Pseudomonas aeruginosa, Acinetobacter baumannii and Staphylococcus aureus) identified in public sector hospitals in South Africa during 2010. Major findings include the accelerated... -
Antimicrobial susceptibility patterns of Escherichia coli strains isolated from urine samples in South Africa from 2007-2011
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: Colleen Bamford --- National Health Laboratory Service (NHLS), Groote Schuur and University of Cape Town, Kim Bonorchis --- Medical Technology Microbiology Laboratory Manager, National Health Laboratory Service (NHLS), Green Point and University of Cape Town, Anthea Ryan --- Medical Technology Microbiology Laboratory Manager, National Health Laboratory Service (NHLS), Green Point and University of Cape Town, Rena Hoffmann --- Registrar Medical Microbiology, National Health Laboratory Service (NHLS), Tygerberg and Stellenbosch University, Preneshni Naicker --- Registrar Medical Microbiology, National Health Laboratory Service (NHLS), Tygerberg and Stellenbosch University, Motlatji Maloba --- National Health Laboratory Service (NHLS), Dr George Mukhari and University of Limpopo, Trusha Nana --- National Health Laboratory Service (NHLS) Charlotte Maxeke Johannesburg Academic and University of the Witwatersrand, I. Zietsman --- Ampath Laboratories, C. Govind --- Lancet Laboratories, DurbanEscherichia coli is the most common cause of urinary tract infections. Knowledge of its local antimicrobial susceptibility patterns can be used to inform choice of empiric antimicrobial therapy. In this article, we review data on antimicrobial susceptibility patterns of E... -
Epidemiology of rubella disease in south-west nigeria: trends and projection from measles case-based surveillance data
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: A A Fatiregun --- Department of Epidemiology and Medical Statistics, Faculty of Public Health, College of Medicine, A F Fagbamigbe --- Department of Epidemiology and Medical Statistics, Faculty of Public Health, College of Medicine, A S Adebowale --- Population Training and Research Training Unit, Faculty of Human and Social Sciences, North-West University,Although surveillance for rubella does not exist in Nigeria, a measles case-based surveillance system was introduced in 2005 as one of the strategies for measles morbidity control, and included laboratory testing for confirmation of the disease. In this report, we... -
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... -
Epidemiological description of cholera outbreak in Mpumalanga Province, South Africa, December 2008–March 2009
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Themba T Sigudu --- Department of Environmental Health, Faculty of Health Sciences, South Africa Khin S Tint --- South African Field Epidemiology and Laboratory Training Programme, South Africa Brett Archer --- South African Field Epidemiology and Laboratory Training Programme, South AfricaBackground: In developing countries, cholera often occurs in large-scale outbreaks and causes high burden of disease and leads to death in some cases. The purpose of the study was to describe and characterise cholera cases, and also to identify environmental... -
Entrepreneurial innovations for agricultural mechanisation in Zimbabwe: Evidence from an informal metal industry survey
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kingstone Mujeyi --- Department of Agricultural Economics, Zimbabwe Jackqueline Mutambara --- Department of Agricultural Economics and Extension, Zimbabwe Shephard Siziba --- Department of Agricultural Economics and Extension, Zimbabwe Wilbert Z. Sadomba --- Centre for Applied Social Sciences, Zimbabwe Tarisai K. Manyati --- Department of Sociology, ZimbabweThis study uses data collected from 602 randomly selected informal metal industry entrepreneurs across 15 cluster-sampled districts in eight of Zimbabwe's 10 provinces to analyse factors that influence technological innovations development by informal agribusiness entrepreneurs. It applies a binary logistic... -
Influence of energy saving on the quality of lighting services on selected hotels in Mpumalanga, Republic of South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: F. Machete --- Department of Environmental Health, South Africa C. Hongoro --- Health Research and Policy, South Africa G. Nhamo --- Institute of Corporate Citizenship, University of South Africa, South Africa K. Mearns --- Department of Environmental Sciences, South AfricaThis paper presents the results of an investigation undertaken on the influence of energy saving on the quality of lighting services on selected hotels in Mpumalanga, one of the nine provinces of the Republic of South Africa. This paper adopted... -
Seed removal by ants, birds and rodents in a woodland savanna habitat in Zimbabwe
Item type: Journal Article • Journal: African Zoology • Authors: Alicia V. Linzey --- Department of Biology, U.S.A. Kimberly A. Washok --- Department of Biology, U.S.A.Seed removal from bait stations was studied in miombo habitat in western Zimbabwe. Previous studies of seed predation in southern Africa have largely been conducted in desert ecosystems. However, this woodland-savanna habitat is more mesic and has relatively predictable rainfall... -
Preliminary comparison of calls of the hybridizing fur seals Arctocephalus tropicalis and A. gazella
Item type: Journal Article • Journal: African Zoology • Authors: M. St Clair Hill --- Mammal Research Institute, Department of Zoology & Entomology, South Africa J.W.H. Ferguson --- Mammal Research Institute, Department of Zoology & Entomology, South Africa M.N. Bester --- Mammal Research Institute, Department of Zoology & Entomology, South Africa G.I.H. Kerley --- Mammal Research Institute, Department of Zoology & Entomology, South AfricaThe Antarctic fur seal (Arctocephalus gazella) and the Subantarctic fur seal (A. tropicalis) hybridize on a relatively small scale at Marion Island. To date the description of calls published for A. tropicalis and A. gazella are fragmented and not easily... -
Termite species richness, composition and diversity on five farms in southern Kunene region, Namibia
Item type: Journal Article • Journal: African Zoology • Authors: J. Zeidler --- Integrated Environmental Consultants Namibia, Namibia S. Hanrahan --- Department of Animal, Plant and Environmental Sciences, South Africa M. Scholes --- Department of Animal, Plant and Environmental Sciences, South AfricaA survey was conducted on five farms in former Damaraland, a communal farming area in arid northwestern Namibia. The aims of the survey were to establish termite inventories for each site and to investigate whether termite diversity is determined by... -
Pup growth and maternal attendance patterns in Subantarctic fur seals
Item type: Journal Article • Journal: African Zoology • Authors: S.P Kirkman --- Mammal Research Institute, Department of Zoology and Entomology, South Africa M.N. Bester --- Mammal Research Institute, Department of Zoology and Entomology, South Africa G.J.G. Hofmeyr --- Mammal Research Institute, Department of Zoology and Entomology, South Africa P.A. Pistorius --- Mammal Research Institute, Department of Zoology and Entomology, South Africa A.B. Makhado --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaSamples of pups from the expanding populations of Subantarctic fur seals (Arctocephalus tropicalis) atMarion and Gough islands were weighed at specific ages between birth and weaning in the period 1993-2000. Growth was estimated and compared between years, sexes, sites of... -
Uptake and distribution of copper in the freshwater crab Potamonautes perlatus (Crustacea) in the Eerste River, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: R.G. Snyman --- Department of Zoology, South Africa A.J. Reinecke [AN0001] J.A.J. Nel --- Department of Zoology, South AfricaThe uptake and distribution of copper in the freshwater crab Potamonautes perlatus in the Eerste River, South Africa, were studied seasonally by comparing copper concentrations in crabs, water and sediment at two localities, one upstream and one downstream from the... -
Opportunistic breeding in the Cape spiny mouse (Acomys subspinosus)
Item type: Journal Article • Journal: African Zoology • Authors: P.A. Fleming [AN0001] S.W Nicolson --- Department of Zoology and Entomology, South AfricaThe relationship between Protea humiflora and its small mammal pollinators was investigated at the fynbos/karoo ecotone in the Riviersonderend Mountains, South Africa. Acomys subspinosus occurred in low densities at Jonaskop, with around 3.9 ± 2.0 (mean ± 1 S.D.) individuals/ha... -
An assessment of biodiversity surrogacy options in the Limpopo Province of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: B. Reyers --- Conservation Planning Unit, South Africa K.J. Wessels --- Geo Informatics Division, Institute for Soil, South Africa A.S. van Jaarsveld --- Conservation Planning Unit, South AfricaBecause of the inadequacy of existing biodiversity distribution data, surrogate measures for regional biodiversity have long been used in conservation area selection. These measures include species and environmental data. However, the assumed relationship between surrogate measures and regional biodiversity has... -
Investigation of a parasitic outbreak of Lernaea cyprinacea Linnaeus (Crustacea: Copepoda) in fish from Zimbabwe
Item type: Journal Article • Journal: African Zoology • Authors: Maxwel Barson [AN0001] Atridah Mulonga --- Department of Biological Sciences, Laboratory of Aquatic Ecology and Evolutionary Biology, Zimbabwe, Belgium Tamuka Nhiwatiwa --- Department of Biological Sciences, Laboratory of Aquatic Ecology and Evolutionary Biology, Zimbabwe, BelgiumInfestation of fish by the crustacean ectoparasite Lernaea cyprinacea Linnaeus, 1758 was investigated to establish the extent of infestation, potential effects of the parasite and its ecological adaptations. Fish samples were collected from impoundments in the Malilangwe Wildlife Reserve in... -
>Utilization of shallow subtidal bays associated with warm temperate rocky shores by the late-stage larvae of some inshore fish species, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Nadine A. Strydom --- South African Institute for Aquatic Biodiversity, South Africa>This work describes the utilization of shallow, subtidal bays, associated with rocky shores, by the late-stage larvae and early juveniles of some common inshore fishes. Larval and early juvenile fishes were collected in seven small bays (30–50 m wide) between... -
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... -
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... -
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... -
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... -
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... -
Assessing the threat of avian predation on a small viperid snake
Item type: Journal Article • Journal: African Zoology • Authors: Bryan Maritz --- School of Animal, Plant and Environmental Sciences, South Africa Samantha Scott --- School of Animal, Plant and Environmental Sciences, South AfricaPredators are important because they influence survival rates, population density and behaviour of prey species. However, assessing the predation pressure facing a particular species is difficult when that species faces a suite of predators. We aimed to characterize the suite... -
Optimisation of nitrogen and potassium for Aloe vera (L.) Burm.f. in a soilless culture system
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Jamal-Ali Olfati --- Horticultural Department, Iran Mohammad Saadatian --- Department of General Science, Faculty of Education, Iraq Eshaq Moqbeli --- Horticultural Department, IranAloe vera (L.) Burm.f. is highly appreciated due to its short growth period and high economic value among all Aloe species, and is used in pharmaceuticals, folk medicine, healthcare, cosmetic products and food products. Hydroponic systems have the potential to... -
South African consumers’ selection criteria for ornamental plants: a market perspective
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lorraine Middleton --- Department of Biology, South AfricaThe considerations of South African consumers in the ornamental plant sector can be interpreted as selection criteria and be used as a marketing tool to increase the use of indigenous plants for ornamental purposes locally. A countrywide survey was undertaken... -
Determinants of the occurrence of a native encroacher species, Pechuelloeschea leubnitziae (wild sage), in the eastern Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Michelle J Tedder --- Grassland Science, School of Life Sciences, South Africa Kevin P Kirkman --- Grassland Science, School of Life Sciences, South Africa Craig D Morris --- Agricultural Research Council, c/o School of Life Sciences, South Africa Winston SW Trollope --- Research and Development, South Africa Mpaphi C Bonyongo --- Okavango Research Institute, BotswanaAlthough indigenous to southern Africa, Pechuel-loeschea leubnitziae is considered a problematic weed as it forms dense monotypic stands in the grasslands and woodlands of the Okavango Delta, Botswana, and is associated with veld degradation and a dominance of shade-tolerant, poor-quality... -
The impact of livestock grazing management systems on soil and vegetation characteristics across savanna ecosystems in Botswana
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Olaotswe E Kgosikoma --- Department of Agricultural Research, Botswana Witness Mojeremane --- Botswana College of Agriculture, Botswana Barbra Harvie --- University of Edinburgh, UKThe objective of this study was to determine the impact of livestock grazing management systems on soil and vegetation dynamics under different environmental conditions of Botswana. Soil and vegetation were randomly sampled along transects located in three ranches and adjacent... -
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... -
Modelling dominant height growth in plantations of Pseudotsuga menziesii (Mirb.) Franco in Spain
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos A López-Sánchez --- Instituto de Silvicultura e Industria de la Madera, México Juan G Álvarez-González --- Departamento de Ingeniería Agroforestal, Escuela Politécnica Superior, Spain Ulises Diéguez-Aranda --- Departamento de Ingeniería Agroforestal, Escuela Politécnica Superior, Spain Roque Rodríguez-Soalleiro --- Departamento de Producción Vegetal, Escuela Politécnica Superior, SpainA model for predicting dominant height growth and site index of Pseudotsuga menziesii (Mirb.) Franco in Spain was constructed. Data from stem analysis of 117 site trees were used. Four dynamic equations using the algebraic difference approach (ADA) and its... -
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)... -
Urban cemeteries in Swaziland: materialising dignity
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Casey Golomski --- Department of Social Anthropology, South AfricaThis photo essay traces the materiality of urban cemeteries in Swaziland to underscore the production of dignity in contemporary funeral culture. Increasingly, death and burial in town are realities for many people who have lost social ties or land tenure... -
Frontiers of freedom: race, landscape and nationalism in the coastal cultures of South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Leslie Bank --- Fort Hare Institute of Social and Economic Research, South AfricaThe idea that whiteness is not a natural category but one which requires construction, maintenance and investment has provoked a rich scholarship, including in South Africa. The scholarship on whiteness in southern Africa has been marked, in particular, by a... -
Competing prayers: the making of a Nigerian urban landscape
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Ulrika Trovalla --- The Nordic Africa Institute, SwedenWhile Christians are seen as aspiring to make the Nigerian city of Jos into a Christian city, Muslims are believed to be trying to turn Jos into a Muslim city. There is a struggle over the urban landscape that is... -
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... -
Estimation of stability-related soil properties using mid-infrared spectroscopy for non-agricultural land use in Lake Victoria basin, Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: B. K. Waruru --- Kenya Agricultural and Livestock Research Organization (KALRO), Kenya K. D. Shepherd --- World Agroforestry Centre (ICRAF), Kenya G. M. Ndegwa --- Jomo Kenyatta University of Agriculture and Technology (JKUAT), Kenya A. Sila --- World Agroforestry Centre (ICRAF), Kenya P. T. Kamoni --- Kenya Agricultural and Livestock Research Organization (KALRO), KenyaMethods for rapid and accurate soil tests are needed for stability-related soil properties, which are valuable for non-agricultural land use. The study tested the applicability of mid-infrared (MIR) spectroscopy for rapid estimation of selected stability-related soil properties. Two sample sets,... -
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... -
Factorial invariance of the Rahim emotional quotient index
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Martina Kotzé --- Business School, University of the Free State, South Africa Petrus Nel --- Department of Industrial Psychology, South AfricaThis study investigated the degree of factorial invariance of the 30-item Rahim Emotional Quotient Index (REQI) (Afzalur Rahim et al., 2002) across gender and language, using multiple group confirmatory factor analysis. Respondents were 341 full-time employed applicants to programmes in... -
Classification of unregulated landfills by waste stream analysis method, a case of Chief Albert Luthuli Municipality, South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Fannie Machete --- Department of Environmental Health, South Africa Karabo Shale --- Department of Environmental Health, South AfricaThe characterisation of unregulated landfills as general landfills is misleading particularly because these landfills are used to dispose of a mixed stream of general and hazardous waste. Unregulated landfills are unlicensed on-land waste disposal facilities that are not designed, constructed... -
An approach to land capability evaluation for agriculture using remote sensing and GIS in Barberspan, North West Province of South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: T.H. Kabanda --- Department of Geography and Environmental Science, South AfricaTo guarantee food security, job creation and graduate small-scale farmers to commercial farmers, unproductive farms in the North West Province that have resulted from the land reform programme need to be restructured and evaluated for agricultural productivity. This study aimed... -
The deterioration of production schedules during unforeseen disruptions
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: J.M. Ikome --- Department of Industrial Engineering, South Africa M.G. Kanakana --- Department of Industrial Engineering, South Africa S.P. Ayodeji --- Department of Industrial Engineering, South AfricaIn most real-world environments, production scheduling is an ongoing process where the presence of a variety of unforeseen disruptions is usually inevitable, and continually forces reconsideration and revision of pre-established schedules. Many of the approaches developed to solve the problem... -
Statistical assessment of maize leaf nutrient and yield relationships in rural agriculture in the Mbizana area, Eastern Cape province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Danie J Beukes --- Agricultural Research Council–Institute for Soil, South Africa Gcina G Jezile --- Agricultural Research Council–Institute for Soil, South Africa Thembisile C Mapumulo --- Agricultural Research Council–Institute for Soil, South Africa Thomas P Fyfield --- Agricultural Research Council–Institute for Soil, South AfricaA medium-term study was conducted under dry land to develop regression models to predict maize yield from leaf analyses for cost-effective fertiliser recommendations. Treatments consisted of lime, organic and inorganic fertiliser applications in a randomised complete block design with three... -
Population density of the Réunion Grey White-eye Zosterops borbonicus within the summit ecosystems of Réunion, Mascarene Islands
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Joris AM Bertrand --- Laboratoire Évolution et Diversité Biologique, France Yann XC Bourgeois --- Laboratoire Évolution et Diversité Biologique, France Christophe Thébaud --- Laboratoire Évolution et Diversité Biologique, FranceAssessing population density is crucial for studying the ecology and evolutionary biology of species as well as for conservation purposes. Here we used point count methods to infer population density in a single-island endemic passerine bird, the Réunion Grey White-eye... -
Assessing the value of wetlands to waterbirds: exploring a population-based index at flyway and regional levels
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Doug M Harebottle --- Animal Demography Unit, Department of Biological Sciences, South Africa Les G Underhill --- Animal Demography Unit, Department of Biological Sciences, South AfricaTraditionally, species richness, species diversity, total count, biomass, energy consumption and the Ramsar ‘1% threshold’ have been used to assess the importance of wetlands for waterbirds. Designation of wetlands of international importance (Ramsar sites) based on waterbirds has focused on... -
Seasonal variation in diversity and abundance of understorey birds in Bunduki Forest Reserve, Tanzania: evaluating the conservation value of a plantation forest
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Chacha Werema --- Department of Zoology and Wildlife Conservation, Tanzania Kim M Howell --- Department of Zoology and Wildlife Conservation, TanzaniaPlantation forests generally support lower bird diversity than natural forests. However, in some instances the plantations have been found to provide suitable habitat for a number of bird species. In the Eastern Arc Mountains, there is limited knowledge how understorey... -
Longevity and survival of the Endangered Seychelles Magpie Robin Copsychus sechellarum
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Julie Gane --- Cousine Island, Seychelles April Burt --- Nature Seychelles, SeychellesThe Seychelles Magpie Robin Copsychus sechellarum was once one of the most threatened birds in the world, but was downgraded from Critically Endangered to Endangered after a long-term recovery programme was success- fully implemented. Comprehensive long-term monitoring of this species... -
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... -
The implication of using a fixed form factor in areas under different rainfall and soil conditions for Pinus kesiya in Zambia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Darius Phiri --- School of Natural Resources, Zambia Eliud Phiri --- 47 Second Street, Mindolo, Zambia Robby Kasubika --- School of Natural Resources, Zambia Donald Zulu --- School of Natural Resources, Zambia Chisala Lwali --- School of Natural Resources, ZambiaThe study was undertaken to evaluate form factors for Pinus kesiya growing in the three Zambia Forest and Forestry Industries Corporation (ZAFFICO) plantations – the Ndola, Ichimpe and Chati groups – under different rainfall (900–1 500 mm) and soil conditions (pH... -
Using synergistic exogenous phytohormones to enhance somatic embryogenesis from leaf explants of a Eucalyptus grandis clone
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Muhammad Nakhooda --- Department of Biotechnology and Consumer Sciences, South Africa Eshani Mandiri --- School of Life Sciences, South AfricaSomatic embryogenesis (SE) in Eucalyptus spp. has been limited to germinated seeds, flowers, lignotubers or zygotic embryos. The low yield of somatic embryos from leaf explants has hampered progress, even though leaves offer a more viable source of clonal explants... -
Speaking the language of the patient: indigenous language policy and practice
Item type: Journal Article • Journal: South African Family Practice • Authors: Margaret Matthews --- University Language Board, Nelson R Mandela School of Medicine, Republic of South Africa Jacqueline Van Wyk --- Clinical and Pedagogical Education, Nelson R Mandela School of Medicine, Republic of South AfricaSouth Africa faces numerous challenges in healthcare, with the result that communities in many rural provinces are grossly underserved. These problems are compounded when doctors are unable to communicate with their patients. IsiZulu is spoken by most people in KwaZulu-Natal... -
Feeding ecology of four livestock species under different management in a semi-arid pastoral system in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Igshaan Samuels --- Agricultural Research Council–Animal Production Institute, Department of Biodiversity and Conservation Biology, South Africa Clement Cupido --- Agricultural Research Council–Animal Production Institute, Department of Biodiversity and Conservation Biology, South Africa Melvin B Swarts --- Agricultural Research Council–Animal Production Institute, Department of Biodiversity and Conservation Biology, South Africa Anthony R Palmer --- Agricultural Research Council–Animal Production Institute, South Africa Jamie W Paulse --- Agricultural Research Council–Animal Production Institute, Department of Biodiversity and Conservation Biology, South AfricaThe Leliefontein communal area in Namaqualand is grazed by mixed species herds that have multiple benefits for pastoralists. This study assessed how the management (herding and free-ranging) of different livestock herds affects their feeding ecology during the wet and dry... -
Effect of Prosopis (mesquite) invasion and clearing on vegetation cover in semi-arid Nama Karoo rangeland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Thabisisani Ndhlovu --- Department of Conservation Ecology and Entomology, South Africa Suzanne J Milton --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Karen J Esler --- Centre for Invasion Biology and Department of Conservation Ecology and Entomology, South AfricaThe Nama-Karoo is the largest of the three biomes that comprise the semi-arid Karoo-Namib ecoregion of southern Africa. Large tracts of Nama-Karoo rangeland have been invaded by alien leguminous trees of the genus Prosopis. We assessed the impact of Prosopis... -
Aboveground biomass production of a semi-arid southern African savanna: towards a new model
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anthony R Palmer --- Agricultural Research Council–Animal Production Institute, South Africa Igshaan Samuels --- Agricultural Research Council–Animal Production Institute, South Africa Clement Cupido --- Agricultural Research Council–Animal Production Institute, South Africa Andiswa Finca --- Agricultural Research Council–Animal Production Institute, South Africa W Fransiska Kangombe --- Department of Biological Sciences, Namibia Isa AM Yunusa --- School of Environmental and Rural Sciences, Australia Susanne Vetter --- Department of Botany, South Africa Isaac Mapaure --- Department of Biological Sciences, NamibiaFollowing a field campaign to determine the species composition, canopy cover, aboveground annual production and leaf area index (LAI) of the semi-arid savanna of north-western Namibia, we present a production model that can be used by graziers to determine the... -
The effects of fire-breaks on plant diversity and species composition in the grasslands of the Loskop Dam Nature Reserve, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Laura M Bachinger --- Department of Plant Science, South Africa Leslie R Brown --- Applied Behavioural Ecology and Ecosystem Research Unit, Department of Environmental Sciences, South Africa Margaretha W van Rooyen --- Department of Plant Science, South AfricaThere is a dearth of knowledge on the effects of annual burning of fire-breaks on species composition, plant diversity and soil properties. Whittaker's plant diversity technique was used to gather data on species composition and diversity in four grassland communities... -
The nearest-plant method is robust and powerful enough for different survey teams to monitor change in mesic grassland species composition
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Alan Short --- Themeda Eco Consulting, South Africa Craig Morris --- Agricultural Research Council–Livestock Business Division, Range and Forage Unit, c/o School of Biological and Conservation Sciences, South AfricaA long-term rangeland monitoring programme needs to employ a field survey technique that is practicable, precise, powerful enough to distinguish change, not prone to worker bias, and able to distinguish real change from operator error arising from staff turnover. These... -
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... -
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... -
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... -
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... -
Comparative evaluation of commercial rhizobial inoculants of soybean
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Benice J Sivparsad --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa Nyasha Chiuraise --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa Mark D Laing --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South AfricaInoculation of soybean seeds with root-nodule bacteria results in a significant increase in nodulation and yield. Two commercial rhizobial inoculants available on the South African market were tested for their efficacy under standardised conditions in a short-term greenhouse experiment. The... -
Sustainable tourism development and the world heritage status of the Wadden Sea: The case of Terschelling
Item type: Journal Article • Journal: • Authors: Akke Folmer --- Research Group Marine Wetlands Studies, Stenden University of Applied Sciences, Leeuwarden, The Netherlands Hans Revier --- Research Group Marine Wetlands Studies, Stenden University of Applied Sciences, Leeuwarden, The Netherlands Tamara Cupido --- Research Group Marine Wetlands Studies, Stenden University of Applied Sciences, Leeuwarden, The NetherlandsNational governments and regions make great efforts to obtain international recognition for their natural heritage, for instance through UNESCO’s World Heritage Sites list. Since June 2009, the Dutch Wadden Sea has been on the World Heritage List. Our study investigates... -
Food on the Edge: The future of food is a sustainable future
Item type: Journal Article • Journal: • Authors: Máirtín Mac Con Iomaire --- School of Culinary Arts and Food Technology, Dublin Institute of Technology, Dublin, IrelandThis article is a review of “Food on the Edge (FOTE)”, a symposium which ran in Galway, Ireland in October 2015 on the theme of “the future of food”. The aim of FOTE is to create a benchmark for best... -
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. -
Claiming Cape Town: towards a symbolic interpretation of Khoisan activism and land claims
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Rafael Verbuyst --- African Studies Centre Leiden, The NetherlandsCurrent political negotiations in South Africa which explore the possibility of pre-1913 land claims and the recognition of Khoisan traditional authorities have spurred the growth of the “Khoisan revival”: the phenomenon of people identifying as Khoisan and asserting indigenous rights... -
An exploration of the Self-Appraisal Questionnaire for assessing female recidivism in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Johan Prinsloo --- Department of Criminology,This study profiled incarcerated female offenders’ criminogenic-oriented self-appraisals. Respondents were 77 female offenders between the ages of 20 and 56 years, serving custodial sentences within the South African Department of Correctional Services ranging from under a year to 25 years,... -
Variation of physico-chemical parameters along a river transect through the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MJ Gondwe --- University of Botswana, Okavango Research Institute, Botswana WRL Masamba --- University of Botswana, Okavango Research Institute, BotswanaThe Okavango Delta depends on water quantity and quality to sustain its ecosystem services. Whereas many studies have been carried out on its hydrology, few have been done on water quality in the delta. Water pH, electrical conductivity (EC), dissolved... -
Symmetric Intersections of Rauzy Fractals
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Tarek Sellami --- , , Tunisia Víctor F. Sirvent --- , , VenezuelaIn this article we study symmetric subsets of Rauzy fractals of unimodular irreducible Pisot substitutions. The symmetry considered is reflection through the origin. Given an unimodular irreducible Pisot substitution, we consider the intersection of its Rauzy fractal with the Rauzy... -
South African dietary total antioxidant capacity based on secondary intake data in relation to dietary recommendations
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: H Louwrens --- Department of Agricultural and Food Sciences, South Africa F Rautenbach [AN0001] I Venter --- Faculty of Applied Sciences,Objective: In this exploratory study, the average adult South African dietary total antioxidant capacity (TAC) was estimated using secondary data and was evaluated against that determined for dietary intake recommendations. -
Intestinal failure in childhood
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: O. Goulet --- Integrated program of Intestinal Failure, Home Parenteral Nutrition and Liver-Intestinal Transplantation, FranceIntestinal failure (IF) requires the use of parenteral nutrition (PN) for as long as it persists and in case of irreversible IF may be an indication for intestinal transplantation (ITx). Biological evaluation of IF is becoming possible with the use... -
Soil carbon dioxide effluxes from different vegetation environments in semi-arid Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Rebecca Zengeni --- Soil Sciences Department, South Africa Vincent Kakembo --- Department of Geosciences, South Africa Nsalambi Nkongolo --- Centre of Excellence for Geospatial Information Science, USAThough important, CO2 effluxes from non-agricultural ecosystems are poorly characterised. Given that thicket vegetation is prevalent in Eastern Cape, South Africa, we monitored soil CO2 effluxes from an intact thicket, degraded thicket (DT) and grassland (G) over 10 months, as... -
Further evidence that in African acacia, white is a warning colour to herbivores: the white pseudo-galls of Vachellia seyal
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jeremy Midgley --- University of Cape Town, South Africa Huyam Altayeb --- University of Cape Town, South Africa Patrick Mbosso --- University of Yalounde 1, CameroonPseudo-galls of three East African acacia (Vachellia) species were compared to determine the correlates of gall colour and their potential defensive functions. Although all three species produce white thorns, the pseudo-galls of V. gerrardii and V. drepanolobium are dark coloured... -
Impact of Prosopis (mesquite) invasion and clearing on vegetation species composition and diversity in semi-arid Nama-Karoo rangeland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Thabisisani Ndhlovu --- Department of Conservation Ecology and Entomology, South Africa Suzanne J Milton --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa Karen J Esler --- Centre for Invasion Biology and Department of Conservation Ecology and Entomology, South AfricaThe Nama-Karoo biome occupies 28% of South Africa’s land area. Alien leguminous trees of the genus Prosopis have invaded large tracts of Nama-Karoo rangeland. We evaluated the impact of Prosopis invasion and clearing on vegetation species composition and diversity (alien... -
Habitat selection of the Black-shouldered Kite Elanus caeruleus in agroecosystems of Swaziland
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Katharine A Howard --- Department of Wildlife, Sustainability, and Ecosystem Sciences, USA Thomas W Schwertner --- Department of Wildlife, Sustainability, and Ecosystem Sciences, USA James P Muir --- Department of Wildlife, Sustainability, and Ecosystem Sciences, USA Ara Monadjem --- All Out Africa Research Unit, Department of Biological Sciences, SwazilandA decline in many African raptor populations may contribute to loss of ecosystem services such as pest control. The Black-shouldered Kite Elanus caeruleus stands out as an exception, experiencing range expansions due to its proclivity for agricultural landscapes. We surveyed... -
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... -
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... -
Disseminated fungal infection in an HIV-infected patient due to Aureobasidium pullulans
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Wesley G. van Hougenhouck-Tulleken --- Division of Rheumatology, Department of Internal Medicine, South Africa Garrison Mathole --- Department of Internal Medicine, South Africa Alan Karstaedt --- Division of Infectious Diseases, Department of Internal Medicine, South Africa Nimmisha Govind --- Division of Rheumatology, Department of Internal Medicine, South Africa Magendhree Moodley --- Department of Clinical Microbiology and Infectious Diseases, National Health Laboratory Service, South Africa Sharona Seetharam --- Department of Clinical Microbiology and Infectious Diseases, National Health Laboratory Service, South Africa Nelesh P. Govender --- National Institute for Communicable Diseases(Centre for Opportunistic, Tropical and Hospital Infections), a division of the National Health Laboratory Service, South Africa Colin N. Menezes --- Division of Infectious Diseases, Department of Internal Medicine, South AfricaIn South Africa, novel fungal pathogens have emerged as an important cause of disease in HIV-infected individuals. The clinical presentation is characteristically prolonged, insidious and the diagnosis elusive, often being made post mortem. We report an HIV-infected individual with a... -
The meaning of compliance with land and labour legislation: understanding justice through farm workers’ experiences in the Eastern Cape
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Femke Brandt --- Centre for African Studies, South Africa Fani Ncapayi --- Centre for African Studies, South AfricaThis paper explores the social meanings and uses of formal labour legislation on commercial farms in the Eastern Cape. Farm workers’ and dwellers’ experiences expose ongoing land and labour struggles on South Africa’s commercial farms. We focus on the ways... -
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... -
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... -
Effects of land-use changes on benthic macroinvertebrate assemblages in the tropical Umfurudzi River, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Bere --- Chinhoyi University of Technology, Zimbabwe G Chiyangwa --- Chinhoyi University of Technology, Zimbabwe T Mwedzi --- Chinhoyi University of Technology, ZimbabweThe responses of benthic macroinvertebrates to land-use-induced changes in water quality and habitat because of contrasting land-use types along the Umfurudzi River, Zimbabwe, were investigated in 2013. Five stations in a communal area upstream of Umfurudzi National Park, four on... -
Mapping inundation extent, frequency and duration in the Okavango Delta from 2001 to 2012
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Thito --- University of Botswana, Okavango Research Institute, Botswana P Wolski --- Climate System Analysis Group, University of Cape Town, South Africa M Murray-Hudson --- University of Botswana, Okavango Research Institute, BotswanaThe frequency and duration of inundation in river systems are important for a variety of applications, such as water resource management, floodplain mapping and habitat restoration. The Okavango Delta, the fifth largest Ramsar site in the world, has experienced a... -
Long-term landscape changes in vegetation structure: fire management in the wetlands of KwaMbonambi, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LB Luvuno --- School of Life Sciences, South Africa DC Kotze --- Centre for Water Resources Research, School of Agricultural, Earth and Environmental Sciences, South Africa KP Kirkman --- School of Life Sciences, South AfricaIn wetlands the effects of fire on vegetation dynamics are somewhat uncertain. A change detection analysis in the herbaceous wetlands of KwaMbonambi, South Africa, which were subject to frequent fires, revealed that in 1937 the study area comprised grassland (69%),... -
Mesozooplankton community structure changes in the Mfolozi–Msunduzi estuarine system, South Africa, during contrasting river flow conditions
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HL Jerling --- Coastal Research Unit of Zululand, Department of Zoology, South Africa DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaThe Mfolozi–Msunduzi estuarine system is subject to periodic dry and wet cycles, with subsequent changes in the abiotic and biotic characteristics of the system. The aim of the current study was to compare its mesozooplankton composition during relatively dry and... -
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... -
Effect of management on rangeland phytomass, cover and condition in two biomes in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Roelof J Oomen --- Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Germany Anja Linstädter --- Range Ecology and Range Management Group, Germany Jan C Ruppert --- Range Ecology and Range Management Group, Germany Katharina Brüser --- Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Germany Jürgen Schellberg --- Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Germany Frank Ewert --- Institute of Crop Science and Resource Conservation (INRES), University of Bonn, GermanyIn rangelands, grazing management is a main driver of rangeland condition. Due to masking effects of seasonal climate fluctuations, little is known about (dis)similarity of management effects on rangeland condition and forage provision across major dryland biomes. Taking a macro-ecological... -
Monitoring the recovery of a previously exploited surf-zone fish community in the St Lucia Marine Reserve, South Africa, using a no-take sanctuary area as a benchmark
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- Oceanographic Research Institute, South Africa H Winker --- South African National Biodiversity Institute, South Africa JQ Maggs --- Oceanographic Research Institute, South Africa SN Porter --- Oceanographic Research Institute, South AfricaLimiting accessibility to a fishing area can reduce fishing effort effectively and may therefore promote local recovery of depleted stocks. In January 2002, beach driving was banned in South Africa, thereby reducing angler access to large areas of the coastline,... -
Entrepreneurial Intentions: A Cultural Perspective
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Ian K. Alexander --- Department of Food and Resource Economics, Denmark Benson Honig --- McMaster University, DeGroote School of Business, CanadaThe theory of planned behaviour is widely used to measure entrepreneurial intentions. Thus, we investigate the possible moderating role of indigenous ethnic culture on the attitude-intention, subjective norm-intention and perceived behavioural control-intention relationships. In support of the theory of planned... -
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... -
Population estimates of the breeding birds of the Tinhosas islands (Gulf of Guinea), the only major seabird colony of the eastern tropical Atlantic
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Simon Valle --- Division of Biology and Conservation Ecology, School of Science and the Environment, UK Nuno Barros --- Portuguese Society for the Study of Birds, Marine Department, Portugal Iván Ramírez --- BirdLife International, Belgium Ross M Wanless --- Seabird Division, BirdLife South Africa, South AfricaThe Tinhosas islands, in São Tomé e Príncipe, host the most important seabird breeding colony in the Gulf of Guinea, but information on its conservation status was hitherto unpublished or anecdotal, the last assessment having been performed in 1997. A... -
Grey Crowned Crane threat assessment around the wetlands of eastern Uganda
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: William Olupot --- Nature and Livelihoods, UgandaThe Grey Crowned Crane Balearica regulorum was uplisted to globally Endangered in 2012. There is urgent need to determine the threats they face at local levels for their conservation. I conducted formal point-count surveys around the wetlands of eastern Uganda... -
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,... -
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... -
Variations on soil carbon dioxide flux with land-use type and selected soil properties in the hardveld of Botswana
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Oagile Dikinya --- Department of Environmental Science, Botswana Julius Atlhopheng --- Department of Environmental Science, Botswana Trust Manyiwa --- Department of Environmental Science, BotswanaThe dynamics of carbon dioxide (CO2) flux in the hardveld regions of Botswana are poorly understood, with previous studies having concentrated on sandveld and pan environments. In particular, soil organic carbon (SOC) has a positive influence on CO2 emissions to... -
Cost-productivity analysis of South African pine sawtimber mechanised cut-to-length harvesting
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Chloe Williams --- Department of Forest and Wood Science, South Africa Pierre Ackerman --- Department of Forest and Wood Science, South AfricaThe South African forestry industry is experiencing an increase in the number of fully mechanised timber-harvesting systems. Understanding the productivity of these systems, for which data is currently limited for South Africa, is an important step to maximise the utilisation... -
Validation of an efficient visual method for estimating leaf area index in clonal Eucalyptus plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rodrigo Hakamada --- Forest Resources Graduate Program, Brazil Carmeni Giunti Neto --- Fibria, Brazil Cristiane CZ de Lemos --- International Paper do Brasil, Brazil Sérgio R Silva --- National Wheat Research Center, Brazilian Agricultural Research Corporation (Embrapa), Brazil Marina SG Otto --- Department of Plant Physiology and Biochemistry, Brazil Kevin B Hall --- Department of Forestry and Environmental Resources, USA José L Stape --- Suzano Company, BrazilLeaf area index (LAI) is a key ecophysiological parameter in forest stands because it characterises the interface between atmospheric processes and plant physiology. Several indirect methods for estimating LAI have been developed. However, these methods have limitations that can affect... -
Securing African forests for future drier climates: applying ecophysiology in tree improvement
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Casparus J Crous --- Department of Plant and Soil Sciences, South Africa Francois S Malan --- 102, 2nd Avenue, South Africa Michael J Wingfield --- Department of Plant and Soil Sciences, South AfricaIncreasing incidences of drought-induced tree mortality are being recorded worldwide, including Africa. African forests cover a significant proportion of the continent, which implies that African forest sustainability is threatened from a climate-change perspective. This is especially problematic in a developing... -
Mega-trap-plots: a novel method of Sirex woodwasp management on Pinus radiata plantations in Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Miguel A Poisson --- Facultad de Ciencias Forestales, Chile Rodrigo Ahumada --- Bioforest SA, Chile Andrés O Angulo --- Facultad de Ciencias Forestales, Chile Fernando Muñoz --- Facultad de Ciencias Forestales, Chile Eugenio Sanfuentes --- Facultad de Ciencias Forestales, ChileSirex noctilio is one of the most important invasive pests that affect Pinus radiata plantations in Chile. Its management is based on a biological control complex, the most important component of which is the nematode, Deladenus siricidicola. However, in some... -
Still lost in translation: language barriers in South African health care remain
Item type: Journal Article • Journal: South African Family Practice • Authors: VL Van den Berg --- Faculty of Health Sciences, Department of Nutrition and Dietetics, South AfricaThe patient-centred model of health care, which recognises patients’ autonomy, promotes their active participation in decisions concerning their own health, and strives to treat patients holistically, improves health outcomes but relies on effective communication between healthcare providers and patients. In... -
The Outsider Within: An Analysis of the Representation of Power and Language in Tayeb Salih’s Season of Migration to the North
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Mohammad Shabangu --- Department of English, GermanyUsing Tayeb Salih’s Season of Migration to the North, this article argues that Salih employs the precariousness of language as a key organizing principle for his novel about cultural deracination. In doing so, he calls into question the very sense... -
A Review of “Entrepreneurial Intentions: A Cultural Perspective”, (Ian K. Alexander and Benson Honig)
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Anastacia Mamabolo --- Gordon Institute of Business Science, South Africa Ekaete Benedict --- University of the Free State, South Africa Hermann Ndofor --- Kelly School of Business, USAThis review of Ian Alexander and Benson Honig’s paper “Entrepreneurial intentions: A cultural perspective” highlights the importance of examining ethnicity based culture in entrepreneurship and the practical implications of Alexander and Honig’s findings. In their paper, Alexander and Honig propose... -
A stability optimization model for shaft rotor-bearing systems
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chiemela Onunka --- Discipline of Mechanical Engineering, South Africa Herbert A. Grobler --- Discipline of Mechanical Engineering, South Africa Glen Bright --- Discipline of Mechanical Engineering, South AfricaThe paper presents the modelling of unbalance in a shaft rotor-bearing system using energy methods and finite element analysis strategies. The modelling process brought about the review of three types of unbalance in the shaft rotor-bearing system. They include mass... -
Farmer perceptions of climate change impacts on Swaziland’s sugar industry
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bon’sile Faith Nicollete Mhlanga-Ndlovu --- Department of Environmental Science, South Africa Godwell Nhamo --- Institute for Corporate Citizenship, University of South Africa, South AfricaThis study investigates the perceptions of sugarcane farmers on climate change impacts and their potential alternative livelihoods in the Lowveld of Swaziland with the objective of informing research and policy initiatives. The study obtained data mainly from a survey involving... -
A machine survival time-based maintenance workforce allocation model for production systems
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: D.E. Ighravwe --- Department of Mechanical Engineering, Nigeria S.A. Oke --- Department of Mechanical Engineering, NigeriaToday’s maintenance workforce operates in a complex business environment and relies on metrics that indirectly link equipment breakdown, fluctuating production rate, demand uncertainties and fluctuating raw material requirements. This has triggered a change in the scope as well as the... -
Lived experiences of school-going early mothers in Swaziland
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Kayi Ntinda --- Department of Educational Foundations and Management, Swaziland S’lungile K. Thwala --- Department of Educational Foundations and Management, Swaziland Thulile P. Dlamini --- Department of Educational Foundations and Management, SwazilandThis study explored the lived family and community experiences of Swazi school-going early mothers (N = 15; age range 13–22 years). Participants responded to family and community relationship experiences focus group discussions. The data were content thematically analysed. The findings... -
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... -
Macroinvertebrate communities associated with duckweed (Lemnaceae) in two Eastern Cape rivers, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PC Muskett --- Department of Zoology and Entomology, South Africa JM Hill --- Department of Zoology and Entomology, South Africa PSR Weyl --- Department of Zoology and Entomology, South AfricaThe functional feeding groups and diversity of macroinvertebrate communities associated with duckweed mats in the New Years River (two sites) and Bloukrans River (two sites), Eastern Cape province, South Africa, were assessed. Duckweed (Lemnaceae) is a ubiquitous family of floating... -
Exploring the invasion of rangelands by Acacia mearnsii (black wattle): biophysical characteristics and management implications
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Onalenna Gwate --- Institute for Water Research, Rhodes University, South Africa Sukhmani K Mantel --- Institute for Water Research, Rhodes University, South Africa Andiswa Finca --- Agricultural Research Council – Animal Production Institute, South Africa Lesley A Gibson --- Department of Construction and Surveying, UK Zahn Munch --- Department of Geography and Environmental Studies, South Africa Anthony R Palmer --- Institute for Water Research, Rhodes University, South AfricaAustralian acacias have spread to many parts of the world. In South Africa, species such as A. mearnsii and dealbata are invasive. Consequently, more effort has focused on their clearing. In a context of increasing clearing costs, it is crucial... -
Potential of Adelaide, Cradock and Middelburg, South Africa, for out-of-season onion production using different planting materials and planting dates
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marina Jordaan --- Eastern Cape Department of Rural Development and Agrarian Reform, Horticultural Research, South Africa Gesine M Coetzer --- Department of Soil, Crop and Climate Sciences, South Africa James Allemann --- Department of Soil, Crop and Climate Sciences, South AfricaOut-of-season onion production is used to produce onions for the early market (April to September) when onion prices peak. No information with regard to this production method is available for the Eastern Cape. Field experiments were therefore conducted in Adelaide,... -
A visual analysis of a cultural tourism destination
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Klaes Eringa --- Stenden Hotel Management School, Stenden University of Applied Sciences, The Netherlands Shenghan Zhou --- Stenden Hotel Management School, Stenden University of Applied Sciences, The NetherlandsThis research investigates how a relatively unknown town that is elected as cultural capital of Europe can use visual materials to attract visitors from totally different areas in the world, particularly China. The study uses visual cues for two purposes:... -
Food on the Edge: The future of food is a sustainable future
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Máirtín Mac Con Iomaire --- School of Culinary Arts and Food Technology, IrelandThis article is a review of “Food on the Edge (FOTE)”, a symposium which ran in Galway, Ireland in October 2015 on the theme of “the future of food”. The aim of FOTE is to create a benchmark for best... -
Sustainable tourism development and the world heritage status of the Wadden Sea: The case of Terschelling
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Akke Folmer --- Research Group Marine Wetlands Studies, The Netherlands Hans Revier --- Research Group Marine Wetlands Studies, The Netherlands Tamara Cupido --- Research Group Marine Wetlands Studies, The NetherlandsNational governments and regions make great efforts to obtain international recognition for their natural heritage, for instance through UNESCO’s World Heritage Sites list. Since June 2009, the Dutch Wadden Sea has been on the World Heritage List. Our study investigates... -
Problem-based learning in the first or second language: Does it make a difference?
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Dirk Humalda --- Stenden Hotel Management School, The Netherlands Wichard Zwaal --- Stenden Hotel Management School, Academy of International Hospitality Research, The NetherlandsProblem-based learning (PBL) is the key didactic approach in the curriculum of the Stenden Hotel Management School. Real-world problems are used to activate prior knowledge and to trigger a learning process aimed at expanding and elaborating students’ understanding and competences... -
An early Pliocene (5.1 Ma) fossil frog community from Langebaanweg, south-western Cape, South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Thalassa Matthews --- , South Africa Eduard van Dijk --- , South Africa Dave L. Roberts --- , South Africa Roger M.H. Smith --- , South AfricaThe 5.1 million year old fossil site of Langebaanweg (LBW) has provided a wealth of information on the evolution of west coast ecosystems along the southern west coast of South Africa and numerous taxa, including small and large mammals, and... -
Vestigial appendicular skeletons in the African and Malagasy skink species Feylinia grandisquamis, Melanoseps ater, Grandidierina lineata and Voeltzkowia mira
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Rachel Liniewski --- , , USA Shane Stanley --- , USA Julia Andrade --- , , USA Phil Senter --- , , USAVestigial appendicular skeletons are present but have not previously been described and illustrated in the skink species Feylinia grandisquamis and Melanoseps ater. Vestigial appendicular skeletons have been described and illustrated in only one specimen of Grandidierina lineata and in a... -
Clutch, egg and hatchling characteristics in the Souss Valley tortoises, Testudo graeca soussensis Pieh, 2001 (Testudines: Testudinidae) from an arid steppe-land of west-central Morocco
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Nawal Hichami --- , , Morocco Mohammed Znari --- , , Morocco Mohamed Naimi --- , , Morocco Salwa Namous --- , , MoroccoClutch, egg and hatchling characteristics in the Souss Valley tortoises Testudo graeca soussensis (Testudinidae) from an arid steppe area of west-central Morocco were investigated in semi captivity in spring–early summer 2011. Mating activity occurs twice in the year, mainly 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... -
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... -
Differences in nitrogen cycling and soil mineralisation between a eucalypt plantation and a mixed eucalypt and Acacia mangium plantation on a sandy tropical soil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sogni Viviane Tchichelle --- Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, Republic of the Congo Daniel Epron --- Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, Republic of the Congo Fidèle Mialoundama --- Université Marien NGouabi, Republic of the Congo Lydie Stella Koutika --- Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, Republic of the Congo Jean-Michel Harmand --- CIRAD, France Jean-Pierre Bouillet --- CIRAD, France Louis Mareschal --- Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, Republic of the CongoSustainable wood production requires appropriate management of commercial forest plantations. Establishment of industrial eucalypt plantations on poor sandy soils leads to a high loss of nutrients including nitrogen (N) after wood harvesting. An ecological intensification of eucalypt plantations was tested... -
Comparison of soil properties under tropical Acacia hybrid plantation and shifting cultivation land use in northern Vietnam
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Trieu Thai Hung --- Tasmanian Institute of Agriculture and School of Land and Food, Australia Richard Doyle --- Tasmanian Institute of Agriculture and School of Land and Food, Australia Alieta Eyles --- Tasmanian Institute of Agriculture and School of Land and Food, Australia Caroline Mohammed --- Tasmanian Institute of Agriculture and School of Land and Food, AustraliaDespite the common use of Acacia species in Vietnam, few studies have examined changes to total soil nitrogen (TN) and total soil carbon (TC) following the planting of Acacia mangium × Acacia auriculiformis (Acacia hybrid) plantations (AH) on formerly eroded... -
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... -
Converting Achebe’s Africa for the New Tanzanian: Things Fall Apart in Swahili Translation
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Meg Arenberg --- Princeton Institute of International and Regional Studies, USAGiven the centrality of Chinua Achebe’s work in the early debates surrounding language choice in African fiction and Achebe’s own claims about the necessary transformation of English in representing African reality, what happens when his most acclaimed and archetypal novel... -
Prevalence of HIV and malaria: a cross-sectional study on Bioko Island, Equatorial Guinea
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Xiangbin Zheng --- Central Laboratory, People’s Republic of China Min Lin --- Central Laboratory, People’s Republic of China Dong-De Xie --- Laboratory Medical Center, People’s Republic of China Jian Li --- Department of Parasitology, People’s Republic of China Jiang-Tao Chen --- The Chinese medical aid team to the Republic of Equatorial Guinea, People’s Republic of China Urbano Monsuy Eyi --- Central Blood Transfusion Service, Republic of Equatorial Guinea Santiago-m Monte-Nguba --- Medical Laboratory, Republic of Equatorial Guinea Juan Carlos Sala Ehapo --- Medical Laboratory, Republic of Equatorial Guinea Hui Yang --- Central Laboratory, People’s Republic of China Hui-Tian Yang --- Central Laboratory, People’s Republic of China Li-Ye Yang --- Central Laboratory, People’s Republic of ChinaMalaria and HIV are two of the most severe public health problems in Africa. However, epidemiological data on Bioko Island is scarce. To investigate the prevalence of malaria and HIV infections and assess association of malaria and HIV infections and... -
Dairy intake-related intentions, attitudes, subjective norms and perceived behavioural control of South African nutrition professionals
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Friedeburg AM Wenhold --- Department Human Nutrition, South Africa Zelda White --- Department Human Nutrition, South AfricaBackground: Intake of dairy-related nutrients of South Africans is low. Nutrition professionals may influence dietary behaviour. Their own disposition related to dairy is unknown, yet important in promoting the “have milk, maas or yoghurt every day” guideline. Aim: Guided by... -
Nitrogen leakages and vegetable dry matter yield in a subtropical wetland soil amended with cattle manure and mineral nitrogen fertiliser
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johnson Masaka --- Department of Land and Water Resources Management, Faculty of Natural Resources Management and Agriculture, Zimbabwe Eliton Chivandi --- School of Physiology, Faculty of Health Sciences, South AfricaThe response of nitrous oxide emission and nitrate leaching to increased nitrogen (N) fertiliser and cattle manure applications to wetland vegetable cropping in subtropical Africa have significant impacts on the atmospheric and terrestrial environments. Two field experiments were carried out... -
Efficacy of fungicides, plant resistance activators and biological control agents against guava wilt disease caused by Nalanthamala psidii
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Maritha H Schoeman --- Agricultural Research Council–Institute for Tropical and Subtropical Crops, South Africa Nico Labuschagne --- Department of Microbiology and Plant Pathology, South Africa Frikkie J Calitz --- Agricultural Research Council–Biometry, South AfricaGuava wilt disease (GWD) caused by the fungus Nalanthamala psidii remains a major constraint to guava production in South Africa and South-east Asia. In the current study, chemical and biological products as well as plant resistance activators were evaluated for... -
Identity experiences of black people in the Netherlands
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Renée Zonneveld --- Tilburg University, The Netherlands Susanne B. E. Brand --- Tilburg University and University of Groningen, The Netherlands Byron G. Adams --- Tilburg University, The Netherlands, and University of Johannesburg, South AfricaIn this study, we used the tri-dimensional model of identity and acculturation strategies to explore how black people living in the Netherlands define themselves. We used a qualitative survey design in which 14 participants (females = 8; age range 21... -
Overview of restoration and management practices in the degraded landscapes of the Sahelian and dryland forests and woodlands of East and southern Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Paxie W Chirwa --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, South Africa Larwanou Mahamane --- African Forest Forum, c/o World Agroforestry Centre (ICRAF), KenyaThe highest deforestation and forest degradation rates in Africa occur in the dry forests and woodlands where pressure for land is increasing, poverty is rampant, livelihood options are few and climate change effects are severe. This paper examines factors that... -
An assessment of the forest regeneration potential of the taungya system of farming in Oyo State, south-western Nigeria
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ismail O Azeez --- Department of Forest Resources Management, Nigeria Labode Popoola --- Department of Forest Resources Management, Nigeria Idowu O Shulamite --- Department of Forest Resources Management, NigeriaBalancing forest regeneration and meeting food and fibre needs of Nigeria’s ever-increasing population challenges is imperative to her sustainable development. Two methods of artificial forest regeneration practiced in Oyo State, Nigeria to meet these challenges are direct planting and taungya... -
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... -
Land use change and its drivers in Kurt Bahir wetland, north-western Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Shewit --- Bahir Dar University, College of Agriculture and Environmental Sciences, Ethiopia M Minwyelet --- Bahir Dar University, College of Agriculture and Environmental Sciences, Ethiopia M Tesfaye --- Bahir Dar University, College of Agriculture and Environmental Sciences, Ethiopia T Lewoye --- Bahir Dar University, College of Agriculture and Environmental Sciences, Ethiopia M Ferehiwot --- Bahir Dar University, College of Agriculture and Environmental Sciences, EthiopiaThe effects of land-use change on ecosystem services in Kurt Bahir wetland were investigated during 2013 to 2014 using LANDSAT satellite images from 1973, 1986, 2002 and 2013 to identify and map changes in land-use classes over time. To understand... -
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... -
Distribution of the invasive alien weed, Lantana camara, and its ecological and livelihood impacts in eastern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ross T Shackleton --- Centre for Invasion Biology, Department of Botany and Zoology, South Africa Arne BR Witt --- Centre for Agriculture and Biosciences International, Kenya Winnifred Aool --- National Agricultural Research Organisation, Uganda Corin F Pratt --- Centre for Agriculture and Biosciences International, UKLantana camara (lantana) is a major invasive shrub globally, impacting upon biodiversity, economies, ecosystem services, and driving socio-ecological change. The aim of this study was to determine the current and potential distribution of lantana in eastern Africa and its livelihood... -
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... -
Estimation of taper rates and volume of smaller-sized logs in spotted gum saw timber plantations in Southeast Queensland, Australia
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: TN Maraseni G Cockfield A ApanSpotted gum (Corymbia citriodora subsp. variegata) is a popular tree species for hardwood saw timber plantations in Southeast Queensland (SEQ), Australia. In many parts of the world, logs up to 10cm top diameter are considered to be merchantable logs and... -
Construct validation of the Zimbardo Time Perspectives Inventory
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Nico Keyser --- Department of Economics, South AfricaThe aim of the present study was to validate the factorial structure and psychometric properties of the Zimbardo Time Perspectives Inventory (ZTPI) in a South African student sample. A total of 200 students completed the ZTPI. The sample comprised 58... -
Effectiveness of Moringa oleifera seed as a coagulant in domestic wastewater treatment
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: K. A. Adeniran --- Department of Agricultural and Biosystems Engineering, Nigeria T. D. Akpenpuun --- Department of Agricultural and Biosystems Engineering, Nigeria B. A. Akinyemi --- Department of Agricultural and Biosystems Engineering, Nigeria R. A. Wasiu --- Department of Agricultural and Biosystems Engineering, NigeriaAn investigation on the effectiveness of Moringa oleifera seed for the treatment of domestic sewage was carried out in 15 litres plastic pots. Completely randomized design (CRD) experimental design was adopted. The treatments included: the control culture (no Moringa seed),... -
Sand-mediated divergence between shallow reef communities on horizontal and vertical substrata in the western Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SN Porter --- Oceanographic Research Institute, South Africa GM Branch --- Marine Research Institute and Department of Biological Sciences, South Africa KJ Sink --- Marine Programme, South African National Biodiversity Institute, Centre for Biodiversity Conservation, South AfricaDistinctions are rarely made between vertical and horizontal surfaces when assessing reef community composition, yet physical differences are expected because of hydrodynamic differences and sediment accumulation on flat surfaces. As sand often diminishes biotic cover, we hypothesised that vertical surfaces... -
Before Colonialism: Oral and Written Textualities in the Polyglotic Zone of the Horn of Africa: The Case of Tigrinya
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Ghirmai Negash --- English and Postcolonial Literatures, African Studies Program, USAIn recent postcolonial literary and cultural studies, there has been renewed interest in the history and vitality of African-language textualities of the pre-colonial era. This article explores new terrain, surveying and shedding light on some of the significant texts and... -
White-backed Vulture Gyps africanus parental care and chick growth rates assessed by camera traps and morphometric measurements
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Machawe I Maphalala --- School of Life Sciences, South Africa Ara Monadjem --- Department of Biological Sciences, SwazilandPersistent vulture declines across Africa are a cause for concern as the number of species threatened with extinction increases. The White-backed Vulture Gyps africanus was, until recently, considered abundant but has been declining rapidly in recent years due to various... -
Unearthing poison use and consequent anecdotal vulture mortalities in Namibia’s commercial farmland – implications for conservation
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Andrea Santangeli --- Helsinki Laboratory of Ornithology, Finnish Museum of Natural History, Finland Volen Arkumarev --- Bulgarian Society for Protection of Birds/BirdLife Bulgaria, Bulgaria Liz Komen --- Namibia Animal Rehabilitation Research and Education Centre, Namibia Peter Bridgeford --- Vultures Namibia, Namibia Holger Kolberg --- Directorate Scientific Services, Ministry of Environment and Tourism, NamibiaAcross Africa, the illegal use of poison is triggering a continent-wide scavenger crisis, with vultures suffering the most severe negative consequences. Vultures may die as indirect victims of the conflict between livestock farmers and predators, or they may be directly... -
Transversus abdominis plane block after Caesarean section in an area with limited resources
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Desale Tewelde Kahsay --- Department of Anesthesia and Critical Care, Eritrea Waltraud Elsholz --- Department of Anesthesia and Critical Care, Eritrea Habteselassie Zerezghi Bahta --- Department of Obstetrics and Gynecology, EritreaBackground: The primary objective of this study was to assess whether transversus abdominis plane (TAP) block is effective as part of multimodal pain management following Caesarean section in an area with limited resources. The study also looked at the advantage... -
Productivity of non-heading Chinese cabbage (Brassica rapa subsp. chinensis) under different agronomic management factors
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–Vegetable and Ornamental Plant Institute, South Africa Noluyolo Nogemane --- University of South Africa, South Africa Christian P du Plooy --- Agricultural Research Council–Vegetable and Ornamental Plant Institute, South Africa Tatenda R Musimwa --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South Africa Tafadzwanashe Mabhaudhi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaProductivity of non-heading Chinese cabbage (Brassica rapa L. subsp. chinensis) was evaluated at Roodeplaat over two winter seasons (2012 and 2013). Agronomic factors considered were plant density, nitrogen level, irrigation frequency and planting date. Irrigating thrice or once a week... -
Optimizing the thermal treatment of Abeokuta kaolin (south-west Nigeria) for production of natural pozzolan
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olasunkanmi A. Adekitan --- Department of Civil Engineering, Nigeria Gbenga M. Ayininuola --- Department of Civil Engineering, NigeriaThe use of pozzolans in construction works have been on the rise in recent times, an effort driven by the need for environmentally friendly alternatives to cement. Calcined kaolin is a natural pozzolan currently being researched and optimum pozzolanic performance... -
Experimental comparison of selected pozzolanic materials
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: K. A. Olonade --- Department of Civil Engineering, Nigeria M. B. Jaji --- Department of Civil Engineering, Nigeria O. A. Adekitan --- Department of Civil Engineering, NigeriaDifferent pozzolanic materials are commonly used in concrete production with different properties. This paper compared the performance of metakaoline (MTK), bamboo leaf ash (BLA), pulverized fly ash (PFA) and corn cob ash (CCA), when used as partial replacement for cement... -
Bereavement care support in a traditionalist South African community setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Mpsanyana Makgahlela --- Department of Psychology, South Africa Tholene Sodi --- Department of Psychology, South AfricaThe present study investigated the bereavement care support as experienced by 14 Northern Sotho (n = 14, males = 50%; mean age = 59 years, SD = 13.7 years) community members. The study adopted the descriptive phenomenological approach. Data on... -
Longer rest periods for intensive rotational grazing limit diet quality of sheep without enhancing environmental benefits
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Warwick B Badgery --- Orange Agricultural Institute, AustraliaIntensive rotational grazing systems (also called cell grazing, holistic grazing or time-controlled grazing) are often implemented to improve production and environmental outcomes. Over recent years there has been considerable interpretation and adaption of the holistic principles that guide the management... -
Optimal grazing management strategies: evaluating key concepts
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Richard WS Fynn --- Okavango Research Institute, University of Botswana, Botswana Kevin P Kirkman --- Grassland Science, South Africa Riaan Dames --- , NamibiaRangeland management strategies must be based on robust ecological and economic concepts if they are to be effective and profitable. Thus, the aim of this paper was to examine concepts related to grazing and resting of grassland and associated effects... -
A global assessment of Holistic Planned Grazing™ compared with season-long, continuous grazing: meta-analysis findings
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Heidi-Jayne Hawkins --- Department of Biological Sciences, South AfricaIt has been claimed that Holistic Planned Grazing™ (HPG), a type of rotational grazing, can increase productivity in rangelands and reverse climate change while doubling the stocking rate, mainly through the impact of densely bunched animals on primary production. Previous... -
Plankton composition, biomass, phylogeny and toxin genes in Lake Big Momela, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MI Hamisi --- Department of Biotechnology and Bioinformatics, Tanzania C Lugomela --- Department of Aquatic Sciences and Fisheries Technology, Tanzania TJ Lyimo --- Department of Molecular Biology and Biotechnology, Tanzania B Bergman --- Department of Ecology, Environment and Plant Sciences, Sweden B Díez --- Department of Ecology, Environment and Plant Sciences, SwedenLake Big Momela, one of the East African soda lakes in Northern Tanzania characterised by highly saline-alkaline conditions, making them inhospitable to a range of organisms, although supporting massive growths of some adapted planktonic microorganisms that serve as food for... -
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... -
Physico-chemical water characteristics and aquatic macroinvertebrates of Lake Tsimanampesotse, south-western Madagascar
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JR Rasoloariniaina --- Centre National de Recherches sur l’Environnement (CNRE), MadagascarSaline lakes are known to be amongst the most productive ecosystems in the world. Tsimanampesotse, a ‘conservation hotspot’ soda lake in southwestern Madagascar, was integrated into the Ramsar wetland network in 1998. Despite its importance for aquatic birds, knowledge of... -
When plenty is not enough: an assessment of the white stumpnose (Rhabdosargus globiceps) fishery of Saldanha Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Parker --- Fisheries Management Branch, Department of Agriculture, South Africa SE Kerwath --- Fisheries Management Branch, Department of Agriculture, South Africa TF Næsje --- Norwegian Institute for Nature Research (NINA), Norway CJ Arendse --- South African National Parks, Rondevlei Scientific Services (Garden Route National Park), South Africa FJ Keulder-Stenevik --- Sars Centre for Marine Molecular Biology, Norway K Hutchings --- Anchor Environmental Consultants, South Africa BM Clark --- Anchor Environmental Consultants, South Africa H Winker --- Fisheries Management Branch, Department of Agriculture, South Africa PD Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa CG Attwood --- Department of Biological Sciences, South AfricaWhite stumpnose Rhabdosargus globiceps is the main target of the linefishery in Saldanha Bay. Increased fishing pressure over the last three decades, particularly by the recreational sector, has led to concerns regarding sustainability of the local white stumpnose stock. The... -
Eelgrass beds and bare substrata – sparid and mugilid composition in contrasting littoral estuarine habitats
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Pollard --- Department of Zoology and Entomology, South Africa AN Hodgson --- Department of Zoology and Entomology, South Africa HM Kok --- Port Elizabeth Museum, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaSeagrass beds serve as nursery grounds for many fish species and often play an important role in the juvenile stages of economically and recreationally important fishes. The eelgrass Zostera capensis is the dominant submerged macrophyte in permanently open South African... -
Use of hydrogels in the planting of industrial wood plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jacob W Crous --- Sappi Forests, South AfricaThe quantity of available water in soil is crucial for plant growth, especially after transplanting as this water will enable the growth of new roots to facilitate nutrient and water uptake. Water absorbed by a hydrogel (superabsorbent polymer) has the... -
Survival and long-term growth of eucalypts on semi-arid sites in a Mediterranean climate, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ben du Toit --- Department of Forest and Wood Science, South Africa Gideon F Malherbe --- Department of Forest and Wood Science, South Africa Anton Kunneke --- Department of Forest and Wood Science, South Africa Thomas Seifert --- Department of Forest and Wood Science, South Africa C Brand Wessels --- Department of Forest and Wood Science, South AfricaFour experiments were established on the semi-arid west coast plain of South Africa during the 1990s. The trails tested the survival and growth of several eucalypt species and hybrids, some of which were established in a climate that is drier... -
Eucalypt plantation management in regions with water stress
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: José LM Gonçalves --- Department of Forest Science, Brazil Clayton A Alvares --- Institute of Forest Research and Study, Brazil José HT Rocha --- Department of Forest Science, Brazil Carolina B Brandani --- Department of Forest Science, Brazil Rodrigo Hakamada --- Department of Forest Science, BrazilMost eucalypt plantations are managed in short rotations (6–8 years) and are established in regions with water and nutritional stresses of varying degrees. The mean annual increment in these regions ranges from 20 to 45 m3 ha−1 y−1 depending on... -
The development of reforestation options for dryland farmland in south-western Australia: a review
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Richard J Harper --- School of Veterinary and Life Sciences, Australia Stanley J Sochacki --- School of Veterinary and Life Sciences, Australia John F McGrath --- School of Veterinary and Life Sciences, AustraliaCurrent forest industries in south-western Australia are based on regrowth natural eucalypt forests and Pinus and Eucalyptus spp. plantations, and restricted to areas with >600 mm y−1 annual rainfall. Dryland farming systems have been developed across 20 million ha in... -
Biomass production and potential water stress increase with planting density in four highly productive clonal Eucalyptus genotypes
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rodrigo Hakamada --- Forest Resources Graduate Program, ‘Luiz de Queiroz’ College of Agriculture, Brazil Robert M Hubbard --- US Department of Agriculture Forest Service, USA Silvio Ferraz --- Forest Sciences Department, ‘Luiz de Queiroz’ College of Agriculture, Brazil José Luiz Stape --- Department of Forestry and Environmental Resources, USA Cristiane Lemos --- International Paper do Brasil, BrazilThe choice of planting density and tree genotype are basic decisions when establishing a forest stand. Understanding the interaction between planting density and genotype, and their relationship with biomass production and potential water stress, is crucial as forest managers are... -
Traces and tracks
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Paul Weinberg --- Centre for African Studies, South AfricaIn this photo essay, well-known photographer Paul Weinberg traces three decades of work on the San in Southern Africa. It is a body of work that has long grappled with the divergence between mythologised versions of the San and the... -
The influence of the importance of event factors on meeting planner satisfaction: A case study of a theme park event business
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Jutta Fast --- Stenden Hotel Management School, Academy of International Hospitality Research, The Netherlands Elsbeth de Boer --- Stenden Hotel Management School, Academy of International Hospitality Research, The Netherlands Bill Rowson --- Stenden Hotel Management School, Academy of International Hospitality Research, The NetherlandsThis paper presents data from a research project aimed at identifying how important the different event factors are to the visiting meeting planners and how this might influence guest satisfaction. The focus for the researchers was to get an overall... -
Horizontal transfer of OXA-23-carbapenemase-producing Acinetobacter species in intensive care units at an academic complex hospital, Durban, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Khine Swe Swe-Han --- Department of Medical Microbiology, South Africa Melendhran Pillay --- Department of Medical Microbiology, South Africa Desmond Schnugh --- Infection Control Services Laboratory, Department of Clinical Microbiology and Infectious Diseases, South Africa Koleka P Mlisana --- Department of Medical Microbiology, South Africa Kamaldeen Baba --- Department of Medical Microbiology, National Health Laboratory Service, South Africa Manormoney Pillay --- Medical Microbiology and Infection Control, School of Laboratory Medicine & Medical Science, South AfricaIntroduction: Carbapenemase production is an important mechanism of carbapenem resistance in Acinetobacter species. This study investigated the presence of the carbapenem-hydrolysing class D β–lactamase- encoding genes, blaOXA-23 and blaOXA-58, and their association with the spread of multidrug-resistant (MDR) Acinetobacter species... -
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... -
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,... -
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... -
The potential for using red claw crayfish and hybrid African catfish as biological control agents for Schistosoma host snails
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Monde --- Copperbelt University, Zambia S Syampungani --- Copperbelt University, Zambia A Rico --- Madrid Institute for Advanced Studies (IMDEA) in Water, Science and Technology Campus, Spain PJ van den Brink --- Wageningen University, The NetherlandsThe potential of red claw crayfish and hybrid African catfish (Clarias gariepinus and Clarias ngamensis) as predators for Schistosoma host snails was evaluated in 2014 by monitoring the consumption of snails by crayfish and catfish in experimental tanks over time... -
The application of camera trapping to assess Rallidae species richness within palustrine wetland habitat in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robin B Colyn --- Terrestrial Bird Conservation Programme, South Africa Alastair M Campbell --- Ingula Nature Reserve, South Africa Hanneline A Smit-Robinson --- Terrestrial Bird Conservation Programme, South AfricaWetlands are vital habitats for a variety of organisms and ecosystem services, but the health of these valuable habitats is declining worldwide. The Rallidae species that rely on these habitats are typically elusive, cryptic and difficult to monitor accurately, especially... -
Avian guild assemblages in forest fragments around Budongo Forest Reserve, western Uganda
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Moreen Uwimbabazi --- Department of Forest Biology and Ecosystems Management, Uganda Amy E Eycott --- Institute of Biology, Norway Fred Babweteera --- Royal Zoological Society of Scotland, UK Eric Sande --- Department of Biological Sciences, Uganda Richard J Telford --- Institute of Biology, Norway Vigdis Vandvik --- Institute of Biology, NorwayRemnant forest fragments provide an opportunity for conservation in fragmented landscapes but some patches are more useful than others. Forest fragments around Budongo Forest Reserve, an Important Bird Area in western Uganda, were surveyed to explore the effects of different... -
Deforestation since independence: a quantitative assessment of four decades of land-cover change in Malawi
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rachel A Bone --- Centre for Environmental Sciences, Faculty of Engineering and the Environment, UK Kate E Parks --- Centre for Environmental Sciences, Faculty of Engineering and the Environment, UK Malcolm D Hudson --- Centre for Environmental Sciences, Faculty of Engineering and the Environment, UK Mathews Tsirinzeni --- LEAD Southern and Eastern Africa, Chancellor College, Malawi Simon Willcock --- Centre for Biological Sciences, Faculty of Natural and Environmental Sciences, UKLand cover has changed rapidly across the tropics over the past century; however, detailed historical information describing the extent and possible drivers of such change is widely lacking. Here, we constructed a history of land-cover change at the district level... -
A South African softwood sawtimber supply chain case study
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Pierre A Ackerman --- Department of Forest and Wood Science, South Africa Elizabeth A van der Merwe --- Department of Forest and Wood Science, South Africa Reino E Pulkki --- Department of Forest and Wood Science, South AfricaSupply chain management principles were analysed by investigating the effects of smaller-scale and incremental interventions in a forest-to-mill value chain on financial returns and forest resource use in an Eastern Cape case study area. Three previous studies provided input by... -
Constrained relationship agency as the risk factor for intimate partner violence in different models of transactional sex
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Rebecca Fielding-Miller --- Department of Medicine, USA Kristin Dunkle --- South African Medical Research Council, South AfricaWomen who engage in transactional sex are more likely to experience intimate partner violence (IPV) and are at higher risk of HIV. However, women engage in transactional sex for a variety of reasons and the precise mechanism linking transactional sex... -
“I will take ARVs once my body deteriorates”: an analysis of Swazi men’s perceptions and acceptability of Test and Start
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Alfred K Adams --- Amsterdam Institute of Social Science Research, the Netherlands Agostino M Zamberia --- Department of Sociology and Social Work, SwazilandSwaziland has the highest HIV prevalence in the world. To mitigate the spread and devastation caused by HIV and to improve the wellbeing of people living with HIV, the country has adopted the latest available HIV prevention campaigns, including “Test... -
Evaluating oat cultivars for dairy forage production in the central Kenyan highlands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Solomon W Mwendia --- Centro Internacional de Agricultura Tropical, Tropical Forages, Kenya Brigitte L Maass --- Centro Internacional de Agricultura Tropical, Tropical Forages, Kenya David G Njenga --- International Fertilizer Development Center, Kenya Fridah N Nyakundi --- Centro Internacional de Agricultura Tropical, Biometrics, Kenya An Maria O Notenbaert --- Centro Internacional de Agricultura Tropical, Tropical Forages, KenyaWith the projected increase in future demand for animal products, efforts to raise animal productivity are necessary to match the rise. Already, the estimated per-capita milk consumption in Kenya has increased to 150 L from 100 L estimated in 1998... -
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... -
Discursive hauntings: limits to reinvention for Zimbabwean farm workers after fast-track land reform
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Andrew Hartnack --- Sustainable Livelihoods Foundation, South AfricaScholars of Zimbabwe’s agrarian milieu since the “fast-track land-reform” in 2000 are increasingly suggesting that the label “farm worker” is no longer a relevant or accurate term for referring to former workers now living in resettlement areas. While many former... -
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... -
Nightjar diversity and microhabitat use in Nechisar National Park, Ethiopia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ruben Evens --- Research Group Zoology: Biodiversity and Toxicology, Belgium Natalie Beenaerts --- Research Group: Environmental Biology, Belgium Nele Witters --- Research Group: Environmental Economics, Belgium Tom Artois --- Research Group Zoology: Biodiversity and Toxicology, BelgiumKnowledge of the distribution and ecology of East African nightjars is, to a large extent, unknown. We collected ecological information on the diversity and microhabitat use of nightjars in Nechisar National Park in January 2015 by executing field captures and... -
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... -
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... -
Wood anatomical and chemical properties related to the pulpability of Eucalyptus globulus: a review
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Isabel Carrillo --- Laboratorio de Recursos Renovables, Centro de Biotecnología, Chile Claudia Vidal --- Laboratorio de Recursos Renovables, Centro de Biotecnología, Chile Juan P Elissetche --- Laboratorio de Recursos Renovables, Centro de Biotecnología, Chile Regis T Mendonça --- Laboratorio de Recursos Renovables, Centro de Biotecnología, ChileEucalyptus globulus is one of the most important hardwood species used by the pulp and paper industry due to its high pulp yield, high wood density, excellent fibre quality and good handsheet properties. However, the wood is a highly variable... -
Single-tree water use and water-use efficiencies of selected indigenous and introduced species in the Southern Cape region of South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tatenda Mapeto --- School of Natural Resources Management, South Africa Mark Gush --- CSIR, Natural Resources and Environment, South Africa Josua Louw --- School of Natural Resources Management, South AfricaIn South Africa, the development of a plantation tree industry using fast-growing introduced species was accelerated by the limited extent of indigenous forests. However, concerns about the impacts of plantations on the country’s limited water resources has initiated forest hydrology... -
The influence of lotteries on employees’ workplace HIV testing behaviour
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Martin Weihs --- Social Aspects of HIV/AIDS Research Alliance (SAHARA) and HIV/AIDS, South Africa Anna Meyer-Weitz --- School of Applied Human Sciences, South Africa Friederike Baasner-Weihs --- Nelson Mandela University, South AfricaThe aim of the study was to understand how lottery incentives influenced the HIV counselling and testing (HCT) behaviour and behaviour intention of shop-floor workers who participated in a workplace HCT campaign initiative in two companies in the Nelson Mandela... -
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... -
Rethinking medicinal plants and plant medicines
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Diana Gibson --- Department of Anthropology and Sociology, South AfricaBecause plants are perceived as sessile and immobile, they are often represented as objects or things in current literature. In this paper, I explore variations and shifts in research and literature since 2000 that reconsider the ways that plant-related ideas,... -
Mesozooplankton of the Kosi Bay lakes, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HL Jerling --- Department of Zoology and Coastal Research Unit of Zululand, South Africa SP Weerts --- Department of Zoology and Coastal Research Unit of Zululand, South AfricaThe Kosi coastal lake system, a chain of four interconnected basins, is located in the subtropical north-eastern corner of South Africa. Little information is available on zooplankton of the system and the main aim of this study is to report... -
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... -
Adult plant resistance to leaf rust and stem rust of wheat in a newly developed recombinant inbred line population
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sandiswa Figlan --- School of Agricultural, Earth and Environmental Sciences, South Africa Tarekegn G Terefe --- Agricultural Research Council–Small Grain Institute, South Africa Hussein Shimelis --- School of Agricultural, Earth and Environmental Sciences, South Africa Toi J Tsilo --- Agricultural Research Council–Small Grain Institute, South AfricaLeaf rust caused by Puccinia triticina and stem rust by P. graminis f. sp. tritici are the most destructive diseases of wheat (Triticum aestivum L.), resulting in substantial yield losses globally. A continuous search for new sources of effective rust... -
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... -
A productivity model for first thinning of Pinus patula using a tractor and double-drum winch in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Thabo Moloi --- Forest Postgraduate Programme, South Africa Michal Brink --- Forest Postgraduate Programme, South Africa Paxie W Chirwa --- Forest Postgraduate Programme, South Africa Elisha Ngulube --- Department of Forestry, MalawiThe productivity of skidding tractors in intermediate harvesting operations has not been determined in Mpumalanga, South Africa. The objective of this study was to develop a productivity model using a farm tractor in first thinning operations in Pinus patula compartments... -
Dissimilar stem and leaf hydraulic traits suggest varying drought tolerance among co-occurring Eucalyptus grandis × E. urophylla clones
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Casparus J Crous --- Department of Plant and Soil Sciences, South Africa Izette Greyling --- Department of Microbiology and Plant Pathology, South Africa Michael J Wingfield --- Department of Plant and Soil Sciences, South AfricaIn South Africa, there is currently a phenomenon where a Eucalyptus grandis × E. urophylla clone is dying on a large scale, whereas co-occurring clones in the same plantation area remain healthy. No primary biotic pathogen has been isolated from... -
Macro and trace elements of 26 browse species growing in semi-arid grazing lands of Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Solomon Tefera --- Department of Animal Science, Namibia Victor Mlambo --- Department of Animal Sciences, South AfricaLeaves and twigs from woody plants provide essential nutrients to range animals. We examined variation in the mineral status of 26 woody species, and the influence of harvesting height as well as the interactions of the main effects on minerals... -
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 =... -
Validation of the trust relationship audit (TRA): An item parcelling approach
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Hartmut von der Ohe --- Department of Industrial and Organisational Psychology, South Africa Nico Martins --- Department of Industrial and Organisational Psychology, South AfricaThis study sought to apply an item parcelling approach to confirm the factor structure of trust in the direct supervisor as measured by the trust relationship audit (TRA). The researchers analysed an existing data set on the TRA from 9... -
Diet of sympatrically breeding Southern Carmine Bee-eater Merops nubicoides and White-fronted Bee-eater Merops bullockoides
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Grzegorz Kopij --- Department of Integrated Environmental Sciences, Ogongo Campus, NamibiaThe Southern Carmine Bee-eater Merops nubicoides and White-fronted Bee-eater Merops bullockoides are insectivore, cavity-nesting bird species, both of which occur in the Zambezi Region, north-eastern Namibia. I examined there the diet composition of these species by an analysis of prey... -
Diurnal activity patterns of Harwood’s Spurfowl Pternistis harwoodi in relation to habitat types and climatic conditions in the Central Highlands of Ethiopia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abadi Mehari Abrha --- Department of Animal, Rangeland and Wildlife Sciences, Ethiopia Shimelis Aynalem Zelelew --- Department of Fisheries, Ethiopia Habtu Kiros Nigus --- Department of Statistics, Ethiopia Aschalew Alelign --- Department of Animal, Rangeland and Wildlife Sciences, EthiopiaHarwood’s Spurfowl Pternistis harwoodi is an endemic bird of Ethiopia. Globally, it is categorised as Vulnerable. Habitat loss and hunting are the major conservation threats to the species. This study investigated the activity patterns of Harwood’s Spurfowl in relation to... -
The effect of Holistic Planned Grazing™ on African rangelands: a case study from Zimbabwe
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mike Peel --- Agricultural Research Council–Animal Production Unit, South Africa Marc Stalmans --- International Conservation Services, South AfricaHolistic Planned Grazing™ (HPG) is purported to have positive long-term effects on rangelands, enhancing ecosystem services. Given comparable environmental templates, but different management regimes, vegetation monitoring and landscape function analysis showed the Africa Center for Holistic Management (ACHM) at Dimbangombe... -
Land-use and land-cover changes and their drivers in rangeland-dependent pastoral communities in the southern Afar Region of Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Muluken Mekuyie --- Disaster Management Training and Education Center for Africa, South Africa Andries Jordaan --- Disaster Management Training and Education Center for Africa, South Africa Yoseph Melka --- Wondo Genet College of Forestry and Natural Resource, EthiopiaThe present study was conducted in the southern Afar Region in Ethiopia to analyse the trends of land-use and land-cover changes and their drivers in the period 1985 to 2015 using remote sensing, field observation, focus group discussions and semi-structured... -
Temperature control of the distributional range of five C3 grass species in the uKhahlamba-Drakensberg Park, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Luke K Bentley --- South African Environmental Observation Network, South Africa Tim G O’Connor --- South African Environmental Observation Network, South AfricaGlobal climate change is expected to influence the distribution of global biodiversity. C4 and C3 perennial grasses co-occur in the fire-prone KwaZulu-Natal uKhahlamba-Drakensberg grasslands, with C3 grass species occurring at cooler locations in the mountain range and C4 grass species... -
Assessing the impacts of domesticated versus wild ungulates on terrestrial small mammal assemblages at Telperion Nature Reserve, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Bonginkosi C Gumbi --- Department of Biological Sciences, Swaziland Julie T Shapiro --- Department of Wildlife Ecology and Conservation, School of Natural Resources and the Environment, USA Themba Mahlaba --- Department of Biological Sciences, Swaziland Robert McCleery --- Department of Wildlife Ecology and Conservation, School of Natural Resources and the Environment, USA Duncan MacFadyen --- Department of Research and Conservation, E Oppenheimer and Sons, Marshalltown, South Africa Ara Monadjem --- Department of Biological Sciences, SwazilandGrazing by large mammals alters vegetation physiognomy, consequently changing habitat suitability for small mammal communities. We investigated the response of terrestrial small mammals to grazing by wild and domesticated ungulates at the boundary of a protected area (Telperion Nature Reserve)... -
Effect of proximity to highways on soil chemical properties and grass condition at Mafikeng, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Chris Munyati --- Department of Geography and Environmental Science, South Africa Oratile Menwe --- Department of Geography and Environmental Science, South AfricaRoads have motor vehicle traffic-sourced ecological effects. This study examined the effect of proximity to roads on soil and grass. Surface soil samples were collected along 60 m transects perpendicular to the four major paved highways of Mafikeng, in two... -
Effect of soil- and foliar-applied nitrogen fertiliser on growth, yield and protein content of spring wheat (Triticum aestivum L.) under glasshouse conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mongezi M Mbangcolo --- Dohne Agricultural Development Institute, South Africa Petrus J Pieterse --- AgriSciences, Department of Agronomy, South AfricaFoliar application of nitrogen (N) can be essential in improving yield and grain protein content of wheat. Limestone ammonium nitrate and calcium nitrate solution were used as two N top-dressing treatments applied at three growth stages to evaluate their effect... -
Skin cancer awareness and sunscreen use among outpatients of a South African hospital: need for vigorous public education
Item type: Journal Article • Journal: South African Family Practice • Authors: NC Dlova --- Discipline of Dermatology, Nelson R Mandela School of Medicine, South Africa R Gathers --- Department of Dermatology, Multicultural Dermatology Center, J Tsoka-Gwegweni --- Department of Public Health Medicine, School of Nursing and Public Health, South Africa RJ Hift --- School of Clinical Medicine, South AfricaBackground: Melanoma incidence among white South Africans is increasing. Among black individuals, melanoma is associated with advanced stage at presentation and significant mortality. -
Through the lens of a herder: insights into landscape ethno-ecological knowledge on rangelands in Namaqualand
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Mogamat Igshaan Samuels --- Agricultural Research Council, South Africa Melvin Swarts --- Agricultural Research Council, South Africa Amy Schroeder --- Department of Biodiversity and Conservation Biology, South Africa Khululiwe Ntombela --- Agricultural Research Council, South Africa Clement Cupido --- Agricultural Research Council, South AfricaPastoral areas around the world, including South Africa, are resource poor and external development interventions to improve conditions have largely been unsuccessful. It has been advocated that the focus should shift from external stakeholders to local pastoralists by incorporating the... -
“Being attentive”: exploring other-than-human agency in medicinal plants through everyday Rastafari plant practices
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Tihana Nathen --- Department of Anthropology and Sociology, South AfricaThe focus is on everyday practices and relations between local medicinal plants, Rastafari bossiesdokters [bush doctors] and kruiemanne [herbalists] of the Matzikama Local Municipality, which lies in the far north-west of the Western Cape Province. Inspired by the work of... -
Towards plant-centred methodologies in anthropology
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Diana Gibson --- Department of Anthropology and Sociology, South AfricaThis paper reflects on research on medicinal plants in the Matzikama Local Municipality, Western Cape, in order to elaborate on methodological possibilities and their problematic in such studies. Classical ethnographic research is usually conducted from an anthropocentric viewpoint, but our... -
Technological advancement and modes of existence in medicinal plant research
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Josh B. Cohen --- Anthropology Section, School of African and Gender Studies, Anthropology and Linguistics, South AfricaThis paper examines the practices and knowledge of kruiedokters [herb doctors] and a phytochemist engaging with healing properties of plants found in Namaqualand, Northern Cape Province. Technological and theoretical advancements in the natural and social sciences toward more holistic or... -
“Doing” diabetes: the unobtrusive presence of plants
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Hameedah Parker --- Department of Anthropology and Sociology, South AfricaThis article investigates the “knowing” and “doing” (through a material semiotic approach) of diabetes. Practices of treatment and healing give insight into how this chronic medical condition is “done” in clinics and in homes, by clinic staff and patients in... -
“Ons is die stam van die gemeenskap”: rethinking old age and vitality in Nuwerus, Western Cape
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Michellé Pasquallie --- Department of Anthropology and Sociology, South AfricaIn this paper, I argue against contemporary South African representations of the elderly as people at the fringes of society, as frail, withdrawn from social activity or “invisible.” Drawing on ethnographic fieldwork carried out in Nuwerus, in the Matzikama Local... -
Plant knowledge: transfers, shaping and states in plant practices
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: William Ellis --- Department of Anthropology and Sociology, and Centre for Humanities Research, South AfricaThis exploratory paper interrogates the various ways in which knowledge about plants has historically been generated. It first examines how plant knowledge is located in and understood by traditional studies of plants, such as ethnobotany. It pushes at the accepted... -
Human and plant interfaces: relationality, knowledge and practices
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Diana Gibson --- Department of Anthropology and Sociology, South Africa William Ellis --- Department of Anthropology and Sociology, South AfricaThis introduction to the special issue on “Human-Plant Interfaces: Relationality, Knowledge and Practices” briefly makes a case for the ethnography of the human-plant interface by referring to three interrelated aspects that emerge from the set of papers that follow. These... -
Therapeutic powers of medicinal plants used by traditional healers in Kavango, Namibia, for mental illness
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Michael Murundu Shirungu --- Academic Affairs, Namibia Ahmad Cheikhyoussef --- Multidisciplinary Research Centre, Science and Technology Division, NamibiaThis paper examines the position, usage and healing power of medicinal plants in the treatment of mental illness in two regions in the Kavango, Namibia. It focuses in particular on three common, locally identified mental disorders, namely nyambi, kasenge, and... -
Impacts of alien ‘ecosystem engineers’ overwhelm interannual and seasonal shifts in rocky-shore community composition on Marcus Island, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Sadchatheeswaran --- Department of Biological Sciences and Marine Research Institute, South Africa GM Branch --- Department of Biological Sciences and Marine Research Institute, South Africa CL Moloney --- Department of Biological Sciences and Marine Research Institute, South Africa TB Robinson --- Department of Botany and Zoology, South AfricaThe South African coastline has been invaded by numerous alien species. Rare pre-invasion (1980) and post-invasion datasets (2001 and 2012) exist for Marcus Island, a small land-tied island in Saldanha Bay, South Africa. These snapshot datasets of the island’s intertidal... -
Rotation-end financial performance of vegetation control on Eucalyptus smithii in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Keith M Little --- School of Natural Resource Management, South Africa Anssi Ahtikoski --- Natural Resources Institute Finland, Finland Andrew R Morris --- Institute for Commercial Forestry Research, South AfricaControl of competing vegetation during eucalypt regeneration is important but the cost-benefit of varying levels of control is not well understood. A trial was initiated to quantify the impact of five vegetation control treatments on Eucalyptus smithii R.T.Baker. to determine... -
Increased planting density as a means for improving Pinus elliottii lumber stiffness
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Gideon M Froneman --- Department of Forest and Wood Science, South Africa C Brand Wessels --- Department of Forest and Wood Science, South AfricaFaster growth and reduced harvesting ages are causing a reduction in the stiffness of lumber from South African grown pine plantations. The objective of this study was to determine whether increased planting densities of Pinus elliottii would result in improved... -
Provider understandings of and attitudes towards integration: Implementing an HIV and sexual and reproductive health service integration model, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Cecilia Milford --- MatCH Research Unit (MRU), Department of Obstetrics and Gynaecology, Faculty of Health Sciences, South Africa Letitia Rambally Greener --- MatCH Research Unit (MRU), Department of Obstetrics and Gynaecology, Faculty of Health Sciences, South Africa Mags Beksinska --- MatCH Research Unit (MRU), Department of Obstetrics and Gynaecology, Faculty of Health Sciences, South Africa Ross Greener --- MatCH Research Unit (MRU), Department of Obstetrics and Gynaecology, Faculty of Health Sciences, South Africa Zonke Mabude --- MatCH Research Unit (MRU), Department of Obstetrics and Gynaecology, Faculty of Health Sciences, South Africa Jenni Smit --- MatCH Research Unit (MRU), Department of Obstetrics and Gynaecology, Faculty of Health Sciences, South AfricaIn South Africa, a lack of integration between sexual and reproductive health (SRH) and HIV services has led to lost opportunities in the treatment cascade. In a context of high HIV, tuberculosis (TB) and unplanned pregnancies, a model for integrating... -
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)... -
Suppression of the aquatic weed Hydrilla verticillata (L.f.) Royle (Hydrocharitaceae) by a leaf-cutting moth Parapoynx diminutalis Snellen (Lepidoptera: Crambidae) in Jozini Dam, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Bownes --- Agricultural Research Council Plant-Protection Research Institute (ARC-PPRI), South AfricaA classical biological control programme against Hydrilla verticillata (L.f.) Royle (Hydrocharitaceae) was initiated in South Africa following the discovery of extensive mats in Jozini Dam in northern KwaZulu-Natal (KZN) in 2006. However, in mid-2008, high densities of a phytophagous insect,... -
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... -
Unplanned extubations in a level one trauma ICU
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: KM Köhne --- Department of Anaesthesiology, South Africa T Hardcastle --- Trauma Service, Inkosi Albert Luthuli Central Hospital and Department of Surgery, University of KwaZulu-Natal, South AfricaBackground: Unplanned endotracheal extubation (UE) is the most common airway adverse event in ICU. This study aimed to determine the incidence, characteristics, complications and outcomes of UE in patients in a level one trauma ICU. -
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... -
Seasonal changes in pasture biomass and grazing behaviour of cattle in the Guinea Savanna agroecological zone of Ghana
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Maxwell Akapali --- Department of Animal Science, Ghana Terry Ansah --- Department of Animal Science, Ghana Ibn Iddriss Abdul-Rahman --- Department of Animal Science, Ghana Benjamin Alenyorege --- Department of Animal Science, Ghana Bernard N Baatuuwie --- Department of Forestry and Forest Resources Management, GhanaSpatial and temporal availability of pasture vegetation and cattle grazing behaviour in three seasons (intermediate season [IM], peak season [PS] and dry season [DS]) in the Guinea Savanna agroecological zone of Ghana was examined. The frequency of occurrence of three... -
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... -
Antimicrobial resistance surveillance in the South African public sector
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Olga Perovic --- Centre for Healthcare-Associated Infections (HAIs), Husna Ismail --- Centre for Healthcare-Associated Infections (HAIs), Erika Van Schalkwyk --- Centre for Healthcare-Associated Infections (HAIs),Electronic surveillance for antimicrobial resistance was established in 2013 for public sector laboratories and released annually. This article reports susceptibility data on ESKAPE pathogens for 2016. -
Antimicrobial resistance surveillance in the South African private sector report for 2016
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Olga Perovic --- Centre for Healthcare-Associated Infections (HAIs), Antimicrobial Resistance (AMR) and Mycoses, Husna Ismail --- Centre for Healthcare-Associated Infections (HAIs), Antimicrobial Resistance (AMR) and Mycoses, Erika Van Schalkwyk --- Centre for Healthcare-Associated Infections (HAIs), Antimicrobial Resistance (AMR) and Mycoses, Warren Lowman --- Department of Clinical Microbiology and Infectious Diseases, School of Pathology, Elizabeth Prentice --- Ampath Microbiology National Reference Laboratory, Marthinus Senekal --- Pathcare Pathology Group Reference Laboratory, Chetna N Govind --- Department of Clinical Microbiology, South AfricaAim: The relevance of surveillance for antimicrobial resistance is increasingly recognised in the light of a global action plan to combat resistance. This report presents antimicrobial susceptibility testing on ESKAPE pathogens from private sector laboratories in South Africa for 2016. -
Macroparasites of angelfish Brama brama (Bonnaterre, 1788) in the southern Benguela Current ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AL Mackintosh --- Department of Biological Sciences, South Africa CC Reed --- Department of Biological Sciences, South Africa MAI Nunkoo --- Department of Biological Sciences, South Africa PH King --- Department of Biology, South Africa CD van der Lingen --- Department of Biological Sciences, South AfricaThe angelfish Brama brama is a mesopelagic species distributed circumglobally in temperate to warm-temperate waters, including continental-shelf-edge and upper-slope waters of the Benguela Current ecosystem. Little is known about the parasite assemblage of Benguela B. brama, with only three parasite... -
Wintertime rates of net primary production and nitrate and ammonium uptake in the southern Benguela upwelling system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RF Flynn --- Department of Oceanography, South Africa JM Burger --- Department of Oceanography, South Africa K Pillay --- Branch: Oceans and Coasts, Department of Environmental Affairs (DEA), South Africa SE Fawcett --- Department of Oceanography, South AfricaThe elevated levels of primary productivity associated with eastern boundary currents are driven by nutrient- rich waters upwelled from depth, such that these regions are typically characterised by high rates of nitrate-fuelled phytoplankton growth. Production studies from the southern Benguela... -
Coral reefs of the Glorieuses Islands, western Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MH Schleyer --- Oceanographic Research Institute (ORI), South Africa L Bigot --- Laboratoire d’ Écologie Marine Tropicale dans les Océans Pacifique et Indien (ENTROPIE), France Y Benayahu --- School of Zoology, George S. Wise Faculty of Life Sciences, IsraelThe benthic fauna on reefs around the Glorieuses Islands, a small and protected Indian Ocean archipelago northwest of Madagascar, was surveyed in November 2015, focusing particularly on the orders Alcyonacea (soft corals and gorgonians) and Scleractinia (stony corals). The species... -
Feasibility economic analysis for electricity generation in internal combustion engine sets using landfill gas in Lagos State
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: A. O. Adepoju --- Project Management Department, Nigeria Y. O. Akinwale --- Department of Economics, Saudi Arabia I. O. Ogundari --- African Institute for Science Policy and Innovation, Obafemi Awolowo University, NigeriaThe main objective of this paper is to analyze the economic feasibility landfill gas for electricity generation in Lagos State. In this paper, methane emissions are estimated by applying the First Order Decay model to landfills in Lagos over the... -
A comparative study of selected multi-criteria decision-making methodologies for location selection of very large concentrated solar power plants in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olayinka S. Ohunakin --- The Energy and Environment Research Group (TEERG), Mechanical Engineering Department, Nigeria Burak Omer Saracoglu --- Orhantepe Mahallesi, Tekel Caddesi, Istanbul, TurkeyThis work studies the location selection of very large concentrated solar power plants (VLCSPPs) in Nigeria using five Multi-Criteria Decision Making (MCDM) methodologies including: Analytic Hierarchy Process (AHP), Consistency-Driven Pairwise Comparisons (CDPC), Decision Expert for Education (DEXi), Elimination and Choice... -
Factors influencing the production of structural plywood in Tasmania, Australia from Eucalyptus nitens rotary peeled veneer
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: David Blackburn --- Centre for Sustainable Architecture with Wood, School of Architecture and Design, Australia Mario Vega --- Centre for Sustainable Architecture with Wood, School of Architecture and Design, Australia Robert Yong --- Ta Ann Tasmania Pty Ltd, Australia Donovan Britton --- Ta Ann Tasmania Pty Ltd, Australia Gregory Nolan --- Centre for Sustainable Architecture with Wood, School of Architecture and Design, AustraliaHarvested logs supplied from five fibre-managed Eucalyptus nitens plantation coupes with different growing environments were assessed for quality and stiffness. Billets extracted from the logs were rotary peeled for veneer. When averaged across the five coupes, 30% of veneer recovered... -
A synthesis on the impact of non-native conifer plantations on ant and beetle diversity in north-western Patagonia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Juan C Corley --- Grupo de Ecología de Poblaciones de Insectos, Argentina Romina D Dimarco --- Grupo de Ecología de Poblaciones de Insectos, Argentina Déborah Fischbein --- Grupo de Ecología de Poblaciones de Insectos, Argentina María V Lantschner --- Grupo de Ecología de Poblaciones de Insectos, Argentina Andrés S Martínez --- Grupo de Ecología de Poblaciones de Insectos, Argentina Maité Masciocchi --- Grupo de Ecología de Poblaciones de Insectos, Argentina Analia Mattiacci --- Grupo de Ecología de Poblaciones de Insectos, Argentina Juan Paritsis --- Grupo de Ecología de Poblaciones de Insectos, Argentina José M Villacide --- Grupo de Ecología de Poblaciones de Insectos, ArgentinaSoftwood forestry with non-native tree species is increasing worldwide and especially in many developing countries of the Southern Hemisphere. Tree plantations are beneficial in environmental and socioeconomic aspects, but at the same time there are recognised costs associated with afforestation... -
Mapping tree aboveground biomass and carbon in Omo Forest Reserve Nigeria using Landsat 8 OLI data
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Iveren B Chenge --- Department of Forest Resources Management, Nigeria Johnson SA Osho --- Department of Forest Resources Management, NigeriaProtected areas in Nigeria are important ecosystems for carbon storage. The aim of this study was to estimate and map tree aboveground biomass (TAGB) and carbon (TAGC) within a tropical forest in Nigeria. Stepwise regression analysis was implemented to develop... -
Communities’ perceptions of benefit-sharing mechanisms for forest-based land reform models in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ratsodo Phillip Tshidzumba --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, Faculty of Natural and Agricultural Sciences, South Africa Paxie W Chirwa --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, Faculty of Natural and Agricultural Sciences, South Africa Folaranmi D Babalola --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, Faculty of Natural and Agricultural Sciences, South AfricaOne of the dominant challenges facing the South African forestry sector is the issue of land restitution. The aim of this study was, therefore, to assess the perception of beneficiaries of benefit-sharing modalities for forest-based land reform initiatives in their... -
An automated framework for business enterprise performance evaluation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: C. O. Anyaeche --- Department of Industrial and Production Engineering, Nigeria D. E. Ighravwe --- Department of Mechanical Engineering, NigeriaThe evaluation of the performance of business enterprises has continued to pose challenges to business managers. Many approaches have been developed to address this problem, but most have been either input or output oriented, while some focus on specific tasks... -
Design of an engineered landfill as possible replacement for an existing dump at Akure, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: O.O. Ojuri --- Department of Civil and Environmental Engineering, Nigeria T.O. Ajijola --- Department of Civil and Environmental Engineering, Nigeria I. I. Akinwumi --- Department of Civil Engineering, NigeriaThis work focuses on the design of an engineered (semi-aerobic) landfill in Akure with a view to encourage a shift from the use of a dumpsite, which despite its adverse environmental impact has remained the method of waste disposal in... -
Pozzolanic and hydration properties of kamafugites and carbonatitic lavas as supplementary cementitious materials in Portland cement
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: A. Buregyeya --- School of Civil and Environmental Engineering, South Africa S. Nwaubani --- School of Civil and Environmental Engineering, South Africa W. Schmidt --- BAM Federal Institute for Materials Research and Testing, Germany A. G. Kerali --- Department of Civil and Environmental Engineering, Uganda U. Bagampadde --- Department of Civil and Environmental Engineering, UgandaKamafugites and carbonatites, being materials of volcanic origin with carbonates as their primary minerals, are relatively low in silica and alumina saturation. Their silica and alumina under-saturation is considered a limiting factor in pozzolanic reactivity; however, these materials are currently... -
Interactions of grazing and rainfall on vegetation at Grootfontein in the eastern Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Justin CO du Toit --- Pasture Research, Grootfontein Agricultural Development Institute, South Africa Tshililo Ramaswiela --- South African Environmental Observation Network, South Africa Marco J Pauw --- South African Environmental Observation Network, South Africa Tim G O’Connor --- South African Environmental Observation Network, South AfricaRainfall and grazing are primary drivers of vegetation composition in the Nama-Karoo. Increased rainfall increases grassiness, to where Nama-Karoo transitions to grassland. Severe grazing treatments (e.g. continuous or summer-only) increase abundance of grazing-tolerant dwarf shrubs and annual grasses, and decrease... -
Reflections, applications and future directions of Long-Term Ecological Research at Tierberg
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Gina Arena --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Helga van der Merwe --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Simon W Todd --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Marco J Pauw --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Suzanne J Milton --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa W Richard J Dean --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Joh R Henschel --- South African Environmental Observation Network (SAEON): Arid Lands Node, South AfricaTierberg-LTER is a research site established in 1987 in the semi-arid Succulent Karoo near Prince Albert in the Western Cape province, South Africa. The original purpose for its establishment was to study ecosystem dynamics and the drivers of vegetation in... -
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... -
Long-term impacts of livestock grazing and browsing in the Succulent Karoo: a 20-year study of vegetation change under different grazing regimes in Namaqualand
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Elelwani Nenzhelele --- Department of Biological Sciences, South Africa Simon W Todd --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South AfricaThis study used a fence-line contrast approach to investigate the long-term impact of high grazing pressure on the vegetation at a site in Namaqualand, South Africa. Forty pairs of permanently marked plots were surveyed in 1996, 2006 and 2016. The... -
Spatial, temporal and attitudinal dimensions of conflict between predators and small-livestock farmers in the Central Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Marine Drouilly --- Institute for Communities and Wildlife in Africa, Department of Biological Sciences, South Africa Marion Tafani --- Institute for Communities and Wildlife in Africa, Department of Biological Sciences, South Africa Nicoli Nattrass --- Institute for Communities and Wildlife in Africa, Department of Biological Sciences, South Africa Justin O’Riain --- Institute for Communities and Wildlife in Africa, Department of Biological Sciences, South AfricaConflict between predators and small-livestock farmers is a global phenomenon adversely impacting the preservation of wildlife, the well-being of livestock and human livelihoods. Such conflict is pervasive in the Karoo region of South Africa but its contemporary history and various... -
The composition of the soil seedbank and its role in ecosystem dynamics and rehabilitation potential in the arid Tankwa Karoo Region, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Manam WB Saaed --- Higher Institute of Agricultural Techniques, Libya Shayne M Jacobs --- Department of Conservation Ecology and Entomology, South Africa Mmoto L Masubelele --- Cape Research Centre, South Africa Igshaan Samuels --- Agricultural Research Council–Animal Production, c/o Department of Biodiversity and Conservation Biology, South Africa Lesego Khomo --- Department of Environmental Sciences, South Africa Yacoub M El-Barasi --- Botany Department, Faculty of Science, LibyaVery few soil seedbank studies have been conducted in South Africa, especially in arid rangelands. Insight into the soil seedbank could therefore improve assessment of rangeland dynamics and enhance rehabilitation efforts. This study aimed to characterise the soil seedbanks in... -
Vegetation responses to seasonal weather conditions and decreasing grazing pressure in the arid Succulent Karoo of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ute Schmiedel --- Institute for Plant Science and Microbiology, Germany Jens Oldeland --- Institute for Plant Science and Microbiology, GermanyThe Succulent Karoo biome is a renowned centre of biodiversity and endemism in the arid winter rainfall region of South Africa that is threatened by climate change. On 20 permanently marked plots within a biodiversity observatory, species richness and cover... -
Before the Anthropocene: human pasts in Karoo landscapes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: David Morris --- McGregor Museum, South AfricaKaroo landscapes today are replete with evidence of recent human impacts. The Karoo is relatively pristine in the South African imaginary, but it is not untouched. Social and historic change in the last 300 years has been dramatic. The article... -
Reflections on the Karoo Special Issue: towards an interdisciplinary research agenda for South Africa’s drylands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South Africa Cherryl Walker --- Department of Sociology and Social Anthropology, South Africa Joh R Henschel --- South African Environmental Observation Network (SAEON): Arid Lands Node, South AfricaWe begin this essay with reflections on major research themes highlighted by the Karoo Special Issue (KSI). These include concerns over land-use change, long-term monitoring, climate change, governance and the need for more interdisciplinary research. We also identify some of... -
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... -
Maize responses to reduced tillage, different plant residue mulch and nitrogen fertiliser on granitic sandy soils of Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Walter Mupangwa --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Isaiah Nyagumbo --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Eleanor Mutsamba --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Blessing Mhlanga --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Jefias Mataruse --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, ZimbabweMulching in smallholder conservation agriculture (CA) systems is constrained by lack of adequate crop residues. A three-year study assessed the effects of reduced tillage systems combined with different plant residue mulch and nitrogen (N) fertiliser on nitrogen uptake using the... -
Propagation of Hypoxis hemerocallidea by inducing corm buds
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Motiki M Mofokeng --- Agricultural Research Council–Roodeplaat, Vegetable and Ornamental Plants, South Africa Riana Kleynhans --- Department of Horticulture, South Africa Lesego M Sediane --- Agricultural Research Council–Roodeplaat, Vegetable and Ornamental Plants, South Africa Liesl Morey --- Agricultural Research Council–Biometry, Corporate Office, South Africa Hintsa T Araya --- Agricultural Research Council–Roodeplaat, Vegetable and Ornamental Plants, South AfricaAfrican potato is facing rapid decline of wild populations due to large-scale harvesting, necessitating efficient means of propagation. Propagation of African potato is difficult due to seed dormancy and the species does not naturally propagate easily from corms. This study... -
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 development of soft skills during internships: The hospitality student’s voice
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Erwin Losekoot --- NHL Stenden University of Applied Sciences, The Netherlands Earney Lasten --- RMIT University, Vietnam Anne Lawson --- Auckland Institute of Studies, New Zealand Beverly Chen --- Auckland Institute of Studies, New ZealandThis paper considers the value of industrial placements in providing an opportunity for hospitality students to develop soft skills in the workplace in addition to the technical skills learned at their educational establishments. While there are concepts such as “problem-based... -
Minimum population size and potential impact of feral and semi-feral donkeys and horses in an arid rangeland
Item type: Journal Article • Journal: African Zoology • Authors: Halcyone Muller --- Conservation South Africa, South Africa Amanda Bourne --- Department of Biological Sciences, South AfricaFarmers in the northern, communally managed parts of the Succulent Karoo, an arid rangeland system in South Africa, historically used donkeys and horses for transport and ploughing. With increasing mechanisation, draught animal power has largely been replaced by machines. Yet,... -
Unique co-occurrence of two genera of cymothoid ectoparasitic isopods on the same individual fish host
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RL Welicky --- , South Africa NJ Smit --- , South AfricaParasitism of a host fish by a single species of cymothoid is regularly reported. For the first time on a temperate-fish host and in South African waters, we observed two species of cymothoids, the flesh-infesting Anilocra capensis and the tongue-infesting... -
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,... -
Extreme significant wave height climate in the Gulf of Guinea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AA Osinowo --- , Nigeria EC Okogbue --- , Nigeria EO Eresanya --- , Nigeria OS Akande --- , NigeriaThis article investigates spatio-temporal trends for different return periods of extreme significant wave height (SWH) in the Gulf of Guinea (GG), northeastern tropical Atlantic Ocean, based on a 37-year (1980–2016) wave hindcast. High-resolution reanalysis windfield datasets were used to force... -
Age, growth and natural mortality of blue jack mackerel Trachurus picturatus (Carangidae) from the Canary Islands, Spain (NW Africa)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Jurado-Ruzafa --- , Spain MTG Santamaría --- , SpainStatus assessment of exploited fish populations is a general requirement to ensure sustainability of fisheries in both global and local contexts. The blue jack mackerel Trachurus picturatus (Bowdich, 1825) remains unassessed in a data-limited fishery in the eastern central Atlantic,... -
The breeding ecology of Mallard Anas platyrhynchos at Lake Tonga, north-eastern Algeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Aicha Fouzari --- Laboratoire de Conservation des Zones Humides, Algeria Farrah Samraoui --- Laboratoire de Conservation des Zones Humides, Algeria Boudjéma Samraoui --- Laboratoire de Conservation des Zones Humides, AlgeriaThe breeding ecology of Mallard Anas platyrhynchos was investigated at Lake Tonga, north-eastern Algeria, which is at the southern edge of the species’ range in the Western Palearctic. Breeding was mainly carried out in stumps of alder carr (Alnus glutinosa)... -
Sensitivity of Meloidogyne incognita second-stage juvenile hatch, motility and viability to pure cucurbitacins and cucurbitacin-containing phytonematicides
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Zakheleni P Dube --- Green Biotechnologies Research Centre, South Africa Phatu W Mashela --- Green Biotechnologies Research Centre, South Africa Dirk de Waele --- Green Biotechnologies Research Centre, South AfricaPrevious claims suggested that pure active ingredients from botanicals were less effective in pest management than their fermented crude-extracts. The objective of this study was to compare the toxicity of pure (98%) cucurbitacin A and B on nematode bioactivities with... -
Family planning desires of older adults (50 years and over) in Botswana
Item type: Journal Article • Journal: South African Family Practice • Authors: Njoku Ola Ama --- Department of Statistics, John O Olaomi --- Department of Statistics,Background: This study analysed the views of a stratified sample of 444 older adult women from selected health districts in Botswana on their family planning (FP) use, knowledge, accessibility and availability. -
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... -
Socio-economic determinants of smallholder plantation sizes in Ghana and options to encourage reforestation
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Richard Osei --- Institute of Botany and Landscape Ecology, Germany Stefan Zerbe --- Faculty of Science and Technology, Italy Volker Beckmann --- Institute of Botany and Landscape Ecology, Germany Aristotle Boaitey --- Geoinformation for Natural Resources and Environmental Management (GeoNAREM), GhanaReforestation, particularly in the tropics, is of crucial importance for the environment as well as society. However, small planting areas and low participation of smallholder farmers in tree planting programmes often obstruct realisation of set planting area targets. In this... -
Trait variations in 28-year-old teak (Tectona grandis) provenance field trials in Ghana, West Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Stephen Adu-Bredu --- CSIR-Forestry Research Institute of Ghana, Ghana Daniel A Ofori --- CSIR-Forestry Research Institute of Ghana, Ghana Anders Ræbild --- Department of Geosciences and Natural Resource Management, Faculty of Science, Denmark Jon K Hansen --- Department of Geosciences and Natural Resource Management, Faculty of Science, Denmark Appolinaire Koffi --- Société de Développement defs Forêts (SODEFOR), Côte d’Ivoire Philipp Vigneron --- CIRAD, Forest Department, Research Unit 39, Diversity and Breeding of Forest Tree Species, France Erik D Kjær --- Department of Geosciences and Natural Resource Management, Faculty of Science, DenmarkStem straightness, axis persistence, presence/absence of protuberant buds and epicormics, diameter and height have profound influence on timber quality and volume of teak (Tectona grandis). Provenance trials of teak were established in the 1970s in Ghana, as part of the... -
High genetic diversity of Fusarium circinatum associated with the first outbreak of pitch canker on Pinus patula in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Felix F Fru --- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Emma T Steenkamp --- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Michael J Wingfield --- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Jolanda Roux --- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), South AfricaThe disease known as pitch canker results from infection of Pinus species by the fungus Fusarium circinatum. This fungus also causes a serious root disease of Pinus seedlings and cuttings in forestry nurseries. Pinus radiata and P. patula are especially... -
Roosting requirements of Helmeted Guineafowl Numida meleagris on Highveld grain and livestock farms with alien tree groves, Gauteng province, South Africa
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 study describes the relationship between Helmeted Guineafowl Numida meleagris and invasive alien trees on livestock and maize farms south-east of Johannesburg, Gauteng province, South Africa. The dependence of the birds on alien trees affects strategies for the removal of... -
Predictors of life satisfaction among multicultural African families in South Korea
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Il-young Choi --- School of Management, South Korea Hyun-ju Choi --- Department of Cultural & Arts Management, South Korea Jeong-hee Lim --- Research Institute Multicultural Community, South Korea Seung-hye Jung --- School of Dance, South Korea Jae-kyeong Kim --- School of Management, South Korea Joon-ho Kim --- Department of Business Administration, South KoreaThe aim of this study was to predict perceived life satisfaction of multicultural African families living in South Korea in terms of their fluency in the Korean language, government support for education, and the experience of discrimination. A total of... -
Estimating evapotranspiration in semi-arid rangelands: connecting reference to actual evapotranspiration and the role of soil evaporation
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Onalenna Gwate --- Institute for Water Research, Rhodes University, South Africa Sukhmani K Mantel --- Institute for Water Research, Rhodes University, South Africa Andiswa Finca --- Agricultural Research Council–Animal Production Institute, South Africa Lesley A Gibson --- School of Engineering, UK Zahn Munch --- Department of Geography and Environmental Studies, South Africa Anthony R Palmer --- Institute for Water Research, Rhodes University, South AfricaIn a context of water scarcity, efforts to increase landscape production should focus on improving water productivity. This requires an appreciation of the various components of evapotranspiration (ET), including soil evaporation (Es) because the latter reflects ‘unproductive’ water loss. Both... -
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... -
The influence of phosphorus and calcium application rates on the mineral composition of the perennial legume Macrotyloma axillare
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Karina Batista --- Instituto de Zootecnia, Brazil Luciana Gerdes --- Instituto de Zootecnia, Brazil Alessandra Aparecida Giacomini --- Instituto de Zootecnia, Brazil Waldssimiler Teixeira de Mattos --- Instituto de Zootecnia, Brazil Ivani Pozar Otsuk --- Instituto de Zootecnia, BrazilThe response of legumes to the supply of either phosphorus (P) or calcium (Ca) alone has been extensively investigated but no prior studies have evaluated their combinations in the perennial legume Macrotyloma axillare (Macrotyloma legume). This study assessed the mineral... -
“I don’t want them to know”: how stigma creates dilemmas for engagement with Treat-all HIV care for people living with HIV in Eswatini
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Shona Horter --- London School of Hygiene and Tropical Medicine, UK Sarah Bernays --- Sydney School of Public Health, Australia Zanele Thabede --- Médecins sans Frontières/Doctors Without Borders, Eswatini Velibanti Dlamini --- Médecins sans Frontières/Doctors Without Borders, Eswatini Bernhard Kerschberger --- Médecins sans Frontières/Doctors Without Borders, Eswatini Munyaradzi Pasipamire --- Swaziland National AIDS Programme, Eswatini Barbara Rusch --- Médecins sans Frontières/Doctors without Borders, Switzerland Alison Wringe --- London School of Hygiene and Tropical Medicine, UK“Treat-all” programmes aim to improve clinical outcomes and to reduce HIV transmission through regular HIV testing and immediate offer of antiretroviral therapy (ART) for those diagnosed HIV-positive, irrespective of immunological status and symptoms of disease. Global narratives on the benefits... -
Long-term effects of pig slurry application on selected soil quality parameters and tissue composition of maize in a subhumid subtropical environment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Tichaedza J Chikuvire --- School of Agricultural Earth and Environmental Sciences, South Africa Pardon Muchaonyerwa --- School of Agricultural Earth and Environmental Sciences, South Africa Rebecca Zengeni --- School of Agricultural Earth and Environmental Sciences, South AfricaEffects of long-term application of pig slurry (PS) on soil organic carbon (SOC) pools, nutrients and maize tissue composition under continuous conventional tillage in a maize–soyabean rotation system in subhumid subtropical environments are unclear. The soil and plant parameters have... -
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,... -
Assessment of arbuscular mycorrhizal fungal spore density and viability in soil stockpiles of South African opencast coal mines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Obinna T Ezeokoli --- Agricultural Research Council–Institute for Soil, South Africa Cyril C Nwangburuka --- Agricultural Research Council–Institute for Soil, South Africa Rasheed A Adeleke --- Agricultural Research Council–Institute for Soil, South Africa Ashira Roopnarain --- Agricultural Research Council–Institute for Soil, South Africa D Garry Paterson --- Agricultural Research Council–Institute for Soil, South Africa Mark S Maboeta --- Unit for Environmental Sciences and Management, South Africa Cornelius C Bezuidenhout --- Unit for Environmental Sciences and Management, South AfricaThe symbioses between arbuscular mycorrhizal (AM) fungi and plant roots is essential for nutrient uptake and growth of most vascular plants. Soil condition and management influence the density and viability of arbuscular mycorrhizal fungal (AMF) spores. In this study, AMF... -
Effect of counselling on the family function of intimate partner violence victims attending antenatal clinic in a tertiary hospital in North Central Nigeria
Item type: Journal Article • Journal: South African Family Practice • Authors: BO Akor --- Department of Family Medicine, Nigeria LA Moses --- Department of Family Medicine, Nigeria ND Baamlong --- Department of Family Medicine, Nigeria LL Shedul --- Department of Family Medicine, Nigeria AS Haruna --- Department of Family Medicine, Nigeria JM Abu --- Department of Family Medicine, Nigeria OU Chira --- Department of Family Medicine, Nigeria NR Ripiye --- Department of Family Medicine, Nigeria RA Abdulkareem --- Department of Family Medicine, NigeriaBackground and aim: Intimate partner violence (IPV) is a global problem. Family dysfunction is an integral characteristic of IPV homes. However, not much has been done regarding restoration of these families. The aim of this study was to explore the... -
Prevalence and predictors of Implanon uptake in Ugu (Ugu North Sub District) 2016/17
Item type: Journal Article • Journal: South African Family Practice • Authors: Anudha Moodley --- Discipline of Public Health Medicine, South Africa Ozayr Mahomed --- Discipline of Public Health Medicine, South AfricaBackground: The contraceptive implant (Implanon) has been recognised as one of the most effective family planning methods and is a healthier choice for women in Africa due to its efficacy and convenience. Despite the evidence of effectiveness and safety of... -
Acute toxicity and adverse effects of aqueous and ethanol extracts of Parkia biglobosa pods on biochemical parameters of Clarias gariepinus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: KA Bawa-Allah --- Environmental Toxicology Unit, Department of Zoology, Nigeria BO Akinnuoye --- Environmental Toxicology Unit, Department of Zoology, NigeriaThe acute toxicity of the aqueous and ethanol extracts of Parkia biglobosa pods against Clarias gariepinus was investigated under laboratory conditions. Agitated behaviours and respiratory distress were also observed during the exposure period. The adverse effects on biochemical parameters were... -
Remote sensing of forest health and vitality: a South African perspective
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sifiso Xulu --- School of Agricultural, Earth and Environmental Sciences, South Africa Michael T Gebreslasie --- School of Agricultural, Earth and Environmental Sciences, South Africa Kabir Y Peerbhay --- School of Agricultural, Earth and Environmental Sciences, South AfricaCommercial forestry plantations are an important and valuable segment of the South African economy and forest managers are required to maximise and sustain forest productivity. However, various factors such as the outbreak of damaging agents are constantly hampering forest health... -
Use of Landsat multi-temporal imagery to assess secondary growth Miombo woodlands in Luanshya, Zambia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Reuben Lungu Lembani --- School of Geography, Archaeology and Environmental Studies, South Africa Jasper Knight --- School of Geography, Archaeology and Environmental Studies, South Africa Elhadi Adam --- School of Geography, Archaeology and Environmental Studies, South AfricaMiombo woodlands are the most extensive natural forest type in subtropical Africa, supporting the livelihood of over 100 million urban and rural settlers. These forests continue to experience extensive deforestation and land degradation due to land use land cover (LULC)... -
Land-use impacts on the composition and diversity of the Baikiaea– Guibourtia–Pterocarpus woodlands of north-western Zimbabwe
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Angella Chichinye --- Department of Forest Resources and Wildlife Management, Zimbabwe Coert J Geldenhuys --- Department of Plant and Soil Sciences, South Africa Paxie W Chirwa --- Department of Plant and Soil Sciences, South AfricaVariation in floristic composition of recovering Baikiaea–Guibourtia–Pterocarpus woodlands was studied in different development stages (from early regrowth to mature woodland) under different land-use systems (protected areas, timber harvesting, pole and firewood collection, and abandoned crop fields), in the Gwayi and... -
Landscape pattern changes over 25 years across a hotspot zone in southern Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Igor José Malfetoni Ferreira --- Remote Sensing Division, Brazil Gabriel da Rocha Bragion --- Remote Sensing Division, Brazil José Hilário Delconte Ferreira --- Biodiversity and Conservation of Nature Department, Brazil Evanilde Benedito --- Center for Research in Limnology, Ichthyology and Aquaculture, Biology Department, Brazil Edivando Vitor do Couto --- Biodiversity and Conservation of Nature Department, BrazilForest fragmentation caused by human activities has many implications for natural landscapes, such as habitat reduction and the loss of biodiversity. This study investigated the temporal fragmentation process of forest remnants in a strongly agro-industrialised region in southern Brazil over... -
Variations in heavy metal concentrations among trophic levels of the food webs in two agroecosystems
Item type: Journal Article • Journal: African Zoology • Authors: Mustafa Soliman --- Entomology Department, Egypt Mohamed El-Shazly --- Entomology Department, Egypt Emtithal Abd-El-Samie --- Entomology Department, Egypt Hamed Fayed --- Zoology Department, EgyptExcessive accumulation of trace metal in soil represents a growing environmental problem posing severe risks to biota, humans and ecosystems. Concentrations of Cd, Pb, Cu and Zn were determined in soil, as well as in representatives of some trophic levels... -
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... -
The impacts of season and livestock management strategy on the quality of diets selected by goats and sheep in the semi-arid rangelands of Namaqualand, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois L Müller --- Agricultural Research Council–Animal Production, South Africa M Igshaan Samuels --- Department of Biodiversity and Conservation Biology, South Africa Clement F Cupido --- Agricultural Research Council–Animal Production, South Africa Melvin BV Swarts --- Agricultural Research Council–Animal Production, South Africa Nefza M Amary --- Department of Biodiversity and Conservation Biology, South Africa Dawood Hattas --- Department of Biological Sciences, South Africa Craig Morris --- Agricultural Research Council–Animal Production, South Africa Lilburne F Cyster --- Department of Biodiversity and Conservation Biology, South Africa J Stephen Boatwright --- Department of Biodiversity and Conservation Biology, South AfricaAccess to good-quality forages is one of the major limitations to livestock production in semi-arid pastoral systems. This study aimed to determine whether there are differences in the nutritional quality of diets selected by herded and free-ranging goat and sheep... -
Seed mix type but not planting method or seed priming affect grassland restoration outcomes: a greenhouse trial
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Stuart Demmer --- School of Life Sciences, South Africa Michelle J Tedder --- School of Life Sciences, South Africa Kevin P Kirkman --- School of Life Sciences, South AfricaCommercial seed mixes and various mechanical planting methods have been implemented to overcome barriers to successful restoration of degraded grasslands but their effectiveness in aiding the restoration process has been understudied. Harvested seed must be cleaned of chaff to allow... -
Inselbergs persist as islands of diversity in a heavily grazed rangeland mosaic at the nexus of three arid biomes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Laetitia C Piers --- Department of Biodiversity and Conservation Biology, South Africa M Igshaan Samuels --- Department of Biodiversity and Conservation Biology, South Africa Mmoto L Masubelele --- Cape Research Centre, South African National Parks, South Africa Lesego Khomo --- Environmental Sciences Department, South AfricaInselbergs are regarded as ‘islands of diversity’ due to the high number of plant species present and level of endemism. They also act as natural sources of fodder for livestock and thus risk becoming homogenised in a heavily grazed rangeland... -
Efforts to improve Zimbabwe communal grazing areas: a review
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Bruce Tavirimirwa --- Department of Research and Specialist Services, Zimbabwe Emmanuel Manzungu --- Department of Soil Science and Engineering, Zimbabwe Soul Washaya --- Department of Animal Science, Zimbabwe Sharai Ncube --- Department of Animal Science, Zimbabwe Shadreck Ncube --- Department of Research and Specialist Services, Zimbabwe Clarice Mudzengi --- Department of Research and Specialist Services, Zimbabwe Richard Mwembe --- Department of Research and Specialist Services, ZimbabweThe management of rangelands over the past decade in Zimbabwe has been on the decline. This has resulted in degraded and depleted communal rangelands. A number of recommendations by various government departments, researchers and non-governmental organisations have been implemented. These... -
Financial Profitability of Carbon Offset Monoculture Plantation Forestry on Smallholder Farms in Trans Mara Sub-County, Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: J. Chemuliti --- Kenya Agricultural and Livestock Research Organization, Kenya C. Ackello-Ogutu --- Department of Agricultural Economics, Kenya S. Mbogoh --- Department of Agricultural Economics, Kenya P. Irungu --- Department of Agricultural Economics, KenyaThere is growing interest in the development of smallholder carbon offset forestry projects in Africa as a means of mitigating climate change while providing co-benefits of development and environmental protection and conservation. Financial profitability of carbon projects is a key... -
The Effect of Provenance, Plant Spacing and Cutting Interval on Leaf Biomass Yield of Moringa Oleifera Lam.
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: C. T. Gadzirayi --- Bindura University of Science Education, Zimbabwe F. Kubiku --- Bindura University of Science Education, Zimbabwe J. Mupangwa --- University of Fort Hare, South Africa B. Masamha --- Bindura University of Science Education, Zimbabwe L. Mujuru --- Bindura University of Science Education, ZimbabweTwo provenances of Moringa oleifera Lam., Malawi and Mutoko, were evaluated to determine the effect of plant spacing and cutting interval on the leaf biomass yield for fodder production. A split-split plot experimental design was set up with provenance as... -
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... -
Effects of Tillage System and Weed Control Method on Weed Infestation and Yield of Lowland Rice (Oryza sativa L.)
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: Eli Kuchi Jiya --- Department of Crop Production, Nigeria Emmanuel Daniya --- Department of Crop Production, Nigeria Musa Gimba Matthew Kolo --- Department of Crop Production, NigeriaA two–year experiment was carried out to determine the effects of tillage (heap and level, hoe plough and herbicide-based zero tillage) and weed control methods (no weeding, hoe weeding at 25 days after transplanting (DAT), hoe weeding at 25 and... -
Environmental benefits of corn cob ash in lateritic soil cement stabilization for road works
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olanrewaju A. Apampa --- Department of Civil Engineering, NigeriaThe potential environmental benefits of corn cob ash (CCA) as pozzolan in stabilizing soils for road construction was investigated. Corn cob obtained from Maya in South West Nigeria was processed to ash similar to Class C Fly Ash and blended... -
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... -
Impact of land use on woody aboveground biomass in Miombo woodlands of western Zambia – comparison of three allometric equations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Priscilla Sichone --- Institute for Plant Science and Microbiology, University of Hamburg, Germany Ute Schmiedel --- Institute for Plant Science and Microbiology, University of Hamburg, Germany Jens Oldeland --- Institute for Plant Science and Microbiology, University of Hamburg, Germany Norbert Jürgens --- Institute for Plant Science and Microbiology, University of Hamburg, GermanyGlobally, the intensification of land use for agriculture, timber and fuel is considered the leading threat to the diversity and biomass of forests and woodlands. To suggest management options, it is important to understand the patterns and drivers of diversity,... -
Comparison of socio-economic and ecological benefits of bamboo and trees: the perspectives of local communities in south-western Ghana
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Richard Osei --- Earth and Life Institute, Belgium Michael Ansong --- Department of Silviculture and Forest Management, Ghana Stefan Zerbe --- Faculty of Science and Technology, ItalyNatural forests are disappearing in many tropical countries, resulting in loss of biodiversity and erosion of forest-dependent livelihoods. The maintenance and restoration of forests as well as a search for alternative natural resources that can concurrently improve the environment and... -
An evaluation of the economics and productivity of fully mechanised tree seedling planting in Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Saulo Philipe Sebastião Guerra --- School of Agronomic Sciences, Brazil Rafael Ribeiro Soler --- School of Agronomic Sciences, Brazil Guilherme Corrêa Sereghetti --- School of Agronomic Sciences, Brazil Guilherme Oguri --- Forestry Science and Research Institute, BrazilFrom an economic point of view, Eucalyptus is the most important forest genus in Brazil, covering more than 5 million ha. However, most of the silvicultural practices have a low level of mechanisation compared with harvesting and logging operations. This... -
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... -
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... -
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?... -
Lack of phylogeographic structure in the endangered Pickersgill’s Reed Frog; Hyperolius pickersgilli (Raw, 1982)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Antoinette Kotze --- , South Africa Taryn M.C. Ralph --- , , South Africa Lisa N. Barrow --- , , USA Jeanne Tarrant --- , South Africa Louis du Preez --- , , South Africa M. Thabang Madisha --- , South Africa Desire L Dalton --- , South AfricaThe Endangered Pickersgill’s Reed Frog (Hyperolius pickersgilli) is endemic to South Africa and restricted to the KwaZulu-Natal (KZN) coast. The natural habitat of H. pickersgilli is limited to fragmented patches of coastal reed-bed wetland, the majority of which continues to... -
Awareness and usage of work-life balance policies, cognitive engagement and perceived organizational support: A multi-level analysis
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Felicity Asiedu-Appiah --- Human Resource and Organisational Development, Ghana David B. Zoogah --- Department of Management and Entrepreneurship, USAUnderpinned by boundary management and social exchange theories, the study tested a multi-level model that examined the effect of collective employee awareness and usage of organizational work-life balance (WLB) policies on employees’ perceived organizational support. Results of multisource data obtained... -
What is the future of foreign food experiences?
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Erwin Losekoot --- Stenden Hotel Management School, The Netherlands John Hornby --- Stenden Hotel Management School, The NetherlandsThis article considers the impact foreign food experiences can have on an individual. Food can be transported across the globe and be a catalyst for understanding and integration, but it can also be used to emphasise the “otherness” that sets... -
The symbolic understanding of milk in Swiss gastronomy
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Perrine Leroy --- Ecole Hoteliere de Lausanne, Switzerland Peter Varga --- Ecole Hoteliere de Lausanne, SwitzerlandIn the 21st century, in a context where milk and dairy products are at the centre of many debates, this article wonders how doubts about these products are perceived in a gastronomic context where they are particularly appreciated and used... -
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... -
New records of Planes crabs associated with sea turtles in Africa and adjacent waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JB Pfaller --- Caretta Research Project, United States AN Palau --- Archie Carr Center for Sea Turtle Research and the Department of Biology, United States PD Agamboué --- Marine Program, Gabon M Barret --- Kélonia, l’Observatoire des Tortues Marines, Réunion S Ciccione --- Kélonia, l’Observatoire des Tortues Marines, Réunion G Cliff --- KwaZulu-Natal Sharks Board, South Africa A Formia --- Marine Program, Gabon JC Manfoumbi --- Ibonga-ACPE [Association pour la Connaissance et la Protection de l’Environnement], Gabon A Marco --- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (EBD-CSIC), Spain G-P Sounguet --- Aventures Sans Frontières, Gabon AD Tucker --- Mote Marine Laboratory and Aquarium, United StatesCrabs of the genus Planes (family Grapsidae) live on floating debris and pelagic animals and spend their lives rafting at the surface of the open ocean. Among living substrata, Planes minutus is frequently found associated with sea turtles. However, prior... -
Vegetation dynamics in the face of a major land-use change: a 30-year case study from semi-arid South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Olli Hyvärinen --- FitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South Africa Chevonne Reynolds --- FitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, South AfricaAlthough wildlife production is widely considered beneficial for semi-arid environments, few studies have reported on the long-term environmental effects of converting from livestock production to game ranching. Asante Sana Game Reserve in South Africa was stocked with domestic livestock for... -
Economic value of non-timber forest products utilized by the households adjacent to the South Nandi forest reserve in Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: James Odhiambo Maua --- Socio-economics, Policy and Governance, Muguga, Kenya Harrison Mugatsia Tsingalia --- Biological Sciences, Kenya Joshua Cheboiwo --- Socio-economics, Policy and Governance, Muguga, KenyaMany rural dwellers in tropical regions depend on non-timber forest products (NTFPs) for their livelihood and income requirements. However, the link between the economic benefits of NTFPs and their resource base (including local availability and sustainability) and sources are poorly... -
Land tenure system innovation and agricultural technology adoption in Burkina Faso: Comparing empirical evidence to the worsening situation of both rural people vulnerability and vulnerable groups’ access to land
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Windinkonté Séogo --- Centre Universitaire Polytechnique de Kaya, Universite Joseph Ki-Zerbo, Burkina Faso Pam Zahonogo --- Economics Department, Burkina FasoThe crucial need for land ownership security to structurally transform the agricultural sector motivated Burkina Faso authorities to run a land reform programme in 2009, allowing producers to acquire formal land property rights. Our study aims to highlight how this... -
“Physiologically, I am hearing, but psychologically, I am Deaf.” Identity: Lived experiences of hearing children born in families with Deafness in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Nomfundo Moroe --- Speech Pathology and Audiology Department, South AfricaThe aim of this study was to explore hearing children of Deaf adult’s (CODAs) experiences of belonging and affiliation within the Deaf and hearing community. Respondents consisted of 10 CODAs between the ages 21 and 40 years of age, recruited... -
FTSE/JSE Index migration: Testing for a tradeable index effect
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Nico Katzke --- Department of Economics, South Africa Charlotte van Tiddens --- Prescient Securities,This paper studies whether periodic changes to the constituents in the Swix Top 40 Index leads to price distortions at quarterly rebalancing. Following large and predictable spikes in trade of affected stocks around rebalancing, the natural question is whether this... -
New land, old claims and the politics of belonging during a changing agrarian situation in central Zimbabwe
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Grasian Mkodzongi --- Tropical Africa Land and Natural Resources Research Institute, ZimbabweThis article examines the way discourses of autochthony and belonging were deployed by various groups of people to make claims over land during the implementation of Zimbabwe’s Fast Track Land Reform Programme (FTLRP) in 2000. Although the FTLRP was not... -
Livelihoods fragility and land tenure in the post-fast track land reform era in Upper Guruve, Zimbabwe
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Hardlife S. Basure --- Sociology and Social Anthropology, Zimbabwe Josiah Taru --- Sociology and Social Anthropology, Zimbabwe Gumisai T. Mutangi --- Sociology and Social Anthropology, ZimbabweThis paper seeks to document the experiences of and challenges experienced by farmers resettled according to the communal/villagised model of resettlement in Upper Guruve district in Zimbabwe. The paper is based on long-term ethnographic fieldwork conducted from 2009 to 2017... -
“Reproducing the social”: contradictory interconnections between land, cattle production and household relations in the Besters Land Reform Project, South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Donna Hornby --- Institute for Poverty, Land and Agrarian Studies, South Africa Ben Cousins --- Institute for Poverty, Land and Agrarian Studies, South AfricaLand redistribution policy in South Africa emphasises commercial farming as the legitimate use of land. This production-oriented framework fails to take into account the intertwined but unstable relationship between the production of market value and social reproduction, and how this... -
Singabantu bendawo: understanding the concept of land from the perspective of ubuntu
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Nompumelelo Zodwa Radebe --- Anthropology and Archaeology, South AfricaThe 54th national conference of the African National Congress, the ruling party in South Africa, resolved amongst other things to review the country’s constitution such that it enables the government to implement land expropriation without compensation. This resolution has faced... -
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... -
The ancestral land debate prior to and during Namibia’s Second National Land Conference: the redistribution-recognition dilemma
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Phanuel Kaapama --- Political and Administrative Studies, NamibiaWith the 2007 adoption of the United Nations Declaration on the Rights of Indigenous People, the notion of ancestral land rights has gained greater global currency. However, this international legal instrument falls short of proffering an unambiguous definition of an... -
The Role of Fiction Writers in the Development of Kiswahili
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Ernest Sangai Mohochi [cor1]This paper analyses fiction writers’ contribution to the development of Kiswahili language. The paper is anchored on the assumption that writers play a big role in the development of language. The contribution of fiction writers has not been widely investigated... -
Are we poles apart? Stakeholders’ cooperation and decision-making in on-land cruise tourism in Iceland and New Zealand
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Tracy Harkison --- Auckland University of Technology, New Zealand Þórný Barðadóttir --- Icelandic Tourism Research Centre, IcelandThe rapid growth of the global cruise ship industry in tourism has been evident in New Zealand in the southern hemisphere and Iceland in the northern hemisphere, where both countries have experienced a substantial increase in cruise ship arrivals at... -
Animal rights/Plant rights
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Jan A. Schulp --- Masters & Research Unit at NHL Stenden University of Applied Sciences, The NetherlandsThis article sketches the rise of the concept of animal rights, especially in the late 20th century, mainly due to the work of Peter Singer. Considering the increase in evidence of plant intelligence, the question is discussed of whether plants... -
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... -
Effects of Chromolaena odorata leaf extract on behaviour and haematology of Clarias gariepinus juveniles (Burchell, 1822)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Okoro --- Department of Fisheries and Aquaculture, Nigeria SC Iheanacho --- Department of Fisheries and Aquaculture, Nigeria J Nwakpa --- Department of Fisheries and Aquaculture, Nigeria K Eze --- Department of Fisheries and Aquaculture, NigeriaThe current study investigated the effect of Chromolaena odorata leaf extract on the behaviour and haematology of Clarias gariepinus juveniles. One hundred and fifty (150) juveniles of C. gariepinus (46.02 ± 1.20 g) were exposed to a range of concentrations... -
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... -
Characterisation of selected micro-estuaries and micro-outlets in South Africa using microalgal, zooplanktonic and macrozoobenthic assemblages
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ML Magoro --- South African Institute for Aquatic Biodiversity, South Africa T Dalu --- South African Institute for Aquatic Biodiversity, South Africa LRD Human --- Department of Botany, South Africa R Perissinotto --- DST/NRF SARChI Chair in Shallow Water Ecosystems, South Africa SHP Deyzel --- South African Environmental Observation Network (SAEON), South Africa TH Wooldridge --- Department of Zoology, Institute for Coastal and Marine Research (CMR), South Africa JB Adams --- DST/NRF SARChI Chair in Shallow Water Ecosystems, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity, South AfricaSouth Africa has approximately 200 micro-estuaries and micro-outlets along its more than 3 000 km of coastline. Many of these microsystems (i.e. micro-outlets and micro-estuaries) share some characteristics with temporarily open/closed estuaries, but differ in that they are supplied by... -
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,... -
The purse-seine fishery for small pelagic fishes off the Madeira Archipelago
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Tejerina --- Observatório Oceânico da Madeira, Agência Regional para o Desenvolvimento da Investigação, Tecnologia e Inovação (OOM/ARDITI) [Oceanic Observatory of Madeira/Regional Agency for the Development of Research, Technology and Innovation], Portugal M Hermida --- Observatório Oceânico da Madeira, Agência Regional para o Desenvolvimento da Investigação, Tecnologia e Inovação (OOM/ARDITI) [Oceanic Observatory of Madeira/Regional Agency for the Development of Research, Technology and Innovation], Portugal G Faria --- Research Service, Direção Regional de Pescas (DRP) [Regional Directorate of Fisheries], Portugal J Delgado --- Research Service, Direção Regional de Pescas (DRP) [Regional Directorate of Fisheries], PortugalSmall pelagic fishes constitute a valuable food resource for human consumption and are also important components of marine food webs. At Madeira, a Portuguese archipelago in the eastern Atlantic, they are the target of a year-round purse-seine fishery operating mainly... -
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... -
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... -
Vachellia sieberiana var. woodii, a high-altitude encroacher: the effect of fire, frost, simulated grazing and altitude in north-western KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jennifer M Russell --- School of Life Sciences, South Africa Michelle J Tedder --- School of Life Sciences, South Africa Stuart Demmer --- School of Life Sciences, South AfricaSavannas and grasslands throughout the world are experiencing bush encroachment, which has serious consequences for net primary productivity. In South Africa, Vachellia sieberiana is encroaching into the savannas and high-altitude grasslands of KwaZulu-Natal. We investigated the role of fire, frost... -
Response of three mesic South African perennial grassland forbs to defoliation and competition
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Sindiso Chamane --- Grassland Science, School of Life Sciences, South Africa Kevin P Kirkman --- Grassland Science, School of Life Sciences, South Africa Craig Morris --- Agricultural Research Council – Animal Production, c/o School of Life Sciences, South Africa Tim G O’Connor --- SAEON, South AfricaThe importance of maintaining biodiversity in natural grasslands under livestock production systems has been recognised. Forbs contribute more to species richness than grasses in South African grasslands. However, little is known about the impact of grazing and grass competition on... -
Clay and iron oxide contents of prismacutanic B, G, soft plinthic B, and E horizons described during the land type survey of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Anizka Stolk --- Department of Soil, Crop and Climate Sciences, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Sciences, South AfricaHumans organise their environment, including soils. With soil classification the challenge is to consistently differentiate between soils. This study was therefore initiated to summarise selected properties of the prismacutanic B, G, soft plinthic B, and E horizons, described during the... -
Influence of tillage, fertiliser regime and weeding frequency on germinable weed seed bank in a subhumid environment in Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Nilton Mashavakure --- School of Agricultural Sciences and Technology, Zimbabwe Arnold B Mashingaidze --- School of Agricultural Sciences and Technology, Zimbabwe Robert Musundire --- School of Agricultural Sciences and Technology, Zimbabwe Edson Gandiwa --- School of Wildlife, Ecology and Conservation, Zimbabwe Christian Thierfelder --- CIMMYT – International Maize and Wheat Improvement Centre, Southern Africa Regional Office, Zimbabwe Victor K Muposhi --- School of Wildlife, Ecology and Conservation, Zimbabwe Ezekia Svotwa --- School of Agricultural Sciences and Technology, ZimbabweMinimum tillage (MT) under conservation agriculture (CA), fertiliser application and weeding frequency influence weed seed-bank dynamics in cropping systems. A study was conducted at the Chinhoyi University of Technology farm, Zimbabwe during the 2014/15 and 2015/16 cropping seasons to investigate... -
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... -
The first range-wide assessment of Saddle-billed Stork Ephippiorhynchus senegalensis distribution
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jonah Gula --- Department of Biology, United States Floyd Weckerly --- Department of Biology, United States KS Gopi Sundar --- International Crane Foundation, United StatesThe Saddle-billed Stork Ephippiorhynchus senegalensis exemplifies a case in conservation research in which a species is assessed as Least Concern on the IUCN Red List and the resulting consideration of low conservation priority has precluded proper scientific study. As a... -
Geographical and temporal variation in the diet of Bank Cormorants Phalacrocorax neglectus in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: BM Dyer --- Department of Environment, South Africa J Cooper --- Department of Botany and Zoology, South Africa RJM Crawford --- Department of Environment, South Africa RB Sherley --- Environment and Sustainability Institute, University of Exeter, United Kingdom S Somhlaba --- Department of Environment, South Africa A Cockcroft --- Department of Environment, South Africa L Upfold --- Department of Environment, South Africa AB Makhado --- Department of Environment, South AfricaThe Bank Cormorant Phalacrocorax neglectus is endemic to the Benguela upwelling ecosystem off southwest Africa and is classified as Endangered owing to a recent large reduction in its number. It is thought that food scarcity, including a decreased abundance of... -
The avifauna, conservation and biogeography of the Njesi Highlands in northern Mozambique, with a review of the country’s Afromontane birdlife
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Samuel EI Jones --- School of Biological Sciences, United Kingdom Gabriel A Jamie --- Biodiversity Inventory for Conservation, Belgium Emidio Sumbane --- Biodiversity Inventory for Conservation, Belgium Merlijn Jocque --- Biodiversity Inventory for Conservation, BelgiumNorthern Mozambique’s ‘sky-island’ mountains have become increasingly recognised for their Afromontane birdlife. Despite growing ornithological coverage, however, several Mozambican mountains remain poorly known. We present results from a three-week survey of three such mountains: the Njesi Plateau, Mount Chitagal and... -
A pedogenetic method for land type survey disaggregation into soil association maps
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: George Munnik van Zijl --- , South Africa Christina Botha --- , South AfricaThere is an increasing demand worldwide for spatial soil information. Unfortunately, gathering new soil data is expensive, leading to a focus on extracting detailed information from existing datasets. The most extensive dataset in South Africa is that of the land... -
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... -
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... -
A comparison of aquatic macroinvertebrate and large branchiopod community composition between temporary pans of a conservation area and surrounding communal area in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: T Dube --- Animal Ecology, Global Change and Sustainable Development, Belgium L de Necker --- Water Research Group, School for Biological Sciences, South Africa V Wepener --- Water Research Group, School for Biological Sciences, South Africa NJ Smit --- Water Research Group, School for Biological Sciences, South Africa T Pinceel --- Animal Ecology, Global Change and Sustainable Development, Belgium GN Mwaijengo --- Animal Ecology, Global Change and Sustainable Development, Belgium P Lemmens --- Laboratory of Aquatic Ecology, Evolution and Conservation, Belgium L Brendonck --- Animal Ecology, Global Change and Sustainable Development, BelgiumAlthough temporary wetlands are often biodiversity hotspots that deliver multiple ecosystem services, they are also threatened by human exploitation. We conducted a comparative field study to investigate the impact of reserve protection on the diversity and community structure of aquatic... -
Spatial patterns and environmental risks of ringnet fishing along the Kenyan coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Thoya --- Kenya Marine and Fisheries Research Institute, Kenya S Pérez-Jorge --- Marine and Environmental Sciences Centre (MARE) and Institute of Marine Research (IMAR), Portugal GM Okemwa --- Kenya Marine and Fisheries Research Institute, Kenya H Mwamlavya --- Kenya Marine and Fisheries Research Institute, Kenya A Tuda --- Kenya Wildlife Service, Kenya N Wambiji --- Kenya Marine and Fisheries Research Institute, Kenya JM Maina --- Department of Environmental Sciences, AustraliaRingnet fishing began in the early 20th century and is practised worldwide, mainly to target nearshore pelagic species. The method was introduced to Kenya’s coastal waters by migrant fishers from Tanzania. However, the impacts of this fishing gear remain poorly... -
Reproductive biology of the mackerel scad Decapterus macarellus from Cabo Verde and the implications for its fishery management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MPV Costa --- Instituto Nacional do Desenvolvimento das Pescas [National Institute for Fisheries Development ] (INDP), Cabo Verde DRS Cruz --- Faculty of Sciences of the University of Lisbon, Portugal LS Monteiro --- Federal University of Rio Grande, Brazil KSM Evora --- University of Cabo Verde, Cabo Verde LG Cardoso --- Federal University of Rio Grande, BrazilThe mackerel scad Decapterus macarellus is of great social and economic importance to Cabo Verde citizens; however, in recent years catches have shown an unexplained decline. The harvest is regulated by way of a minimum legal size and a seasonal... -
Response of the barrier island coastal region of southwestern Nigeria to climate and non-climate forcing
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: IB Danladi --- Department of Geological Engineering, Turkey M Gül --- Department of Geological Engineering, Turkey E Ateş --- Vocational School of Ayaş, TurkeyDespite threats emanating from the influence of climate and non-climate forcing on the barrier island coastal region of southwestern Nigeria, the extent of the coastal erosion is poorly understood. We report evidence of coastal erosion and sediment accumulation in the... -
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,... -
Use of openly available occurrence data to generate biodiversity maps within the South African EEZ
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Yemane --- Department of Environment, Forestry and Fisheries (DEFF), South Africa SP Kirkman --- Department of Environment, Forestry and Fisheries (DEFF), South Africa T Samaai --- Department of Environment, Forestry and Fisheries (DEFF), South AfricaBiodiversity maps are an important component of ecosystem-based management and conservation. In the past, biodiversity maps were largely generated using patchy occurrence data from a range of data sources. Currently, substantial species occurrence data are readily available for large parts... -
Soil organic carbon in agricultural systems of six countries in East Africa – a literature review of status and carbon sequestration potential
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S Namirembe --- Stepup Standard Ltd., Uganda K Piikki --- Swedish University of Agricultural Sciences (SLU), Sweden R Sommer --- WWF Deutschland, Agriculture & Land Use Change, Germany M Söderström --- Swedish University of Agricultural Sciences (SLU), Sweden B Tessema --- Ethiopian Institute of Agricultural Research (EIAR), Ethiopia SS Nyawira --- International Center for Tropical Agriculture (CIAT), KenyaCropland soils are considered to have the potential to sequester atmospheric CO2 through agronomic best management practices (BMPs). To estimate this potential in East Africa, the authors reviewed 69 published studies from Ethiopia, Kenya, Rwanda, Tanzania, Uganda, and Burundi assessing... -
Vulnerability, institutional arrangements and the adaptation choices made by farmers in the Western Cape province of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sanne Raaijmakers --- Fagelstraat 75-HS, the Netherlands Pieter A Swanepoel --- Department of Agronomy, South AfricaFrom 2015 to 2018, South Africa suffered from the worst drought since 1904. Climate change is predicted to increase both the frequency and intensity of droughts in parts of South Africa. In this light it is evident that agricultural systems... -
Revegetation of marginal saline rangelands of southern Tunisia using pastoral halophytes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Abderrazak Tlili --- , Tunisia Emna Ghanmi --- , Tunisia Naziha Ayeb --- , Tunisia Mounir Louhaichi --- , Jordan Mohamed Neffati --- , Tunisia Mohamed Tarhouni --- , TunisiaRevegetation of marginalised rangelands using pastoral halophytes is considered an appropriate scientific and environmental approach to rehabilitation. Atriplex halimus L. (Amaranthaceae), A. mollis Desf. (Amaranthaceae), Cenchrus ciliaris L. (Poaceae) and Lotus creticus L. (Fabaceae) are promising species for arid rangeland... -
Persistent essentialism in Polish nationalist discourse: a Wittgensteinian critique
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Witold Jacorzynski --- , MexicoEssentialism, an erroneous way of thinking that can be traced to classical philosophy, assumes a thing to hold necessary intrinsic characteristics. Such thinking has been commonly employed for a popular understanding of bounded groups of people, establishing imaginary communities and... -
Effects of untreated industrial effluents on water quality and benthic macroinvertebrate assemblages of Lake Hawassa and its tributaries, Southern Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ST Mereta --- , Ethiopia A Ambelu --- , Ethiopia A Ermias --- , Ethiopia Y Abdie --- , Ethiopia M Moges --- , Ethiopia A Haddis --- , Ethiopia D Hailu --- , Ethiopia H Beyene --- , Ethiopia B Kebede --- , Ethiopia WL Mulat --- , United StatesThe present study investigates the impacts of industrial effluents on the macroinvertebrate assemblages and water quality of the Lake Hawassa watershed. The water quality and macroinvertebrate assemblages were assessed at 40 sampling sites. The chemical and ecological water quality was... -
The effectiveness of riparian zones in mitigating water quality impacts in an agriculturally dominated river system in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CR Petersen --- , South Africa NZ Jovanovic --- , South Africa MC Grenfell --- , South AfricaThis study evaluates relationships between contrasting land uses representing an anthropogenic impact gradient in a coastal agricultural catchment, and riparian vegetation, as reflected in changes in nutrient dynamics and water quality. The objectives were to: 1) determine the water and... -
Spatial variability of aquatic macroinvertebrate assemblages in the Okavango Delta, Botswana: considerations for developing a rapid bioassessment tool
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Dallas --- , South Africa B Mosepele --- , BotswanaSpatial variability in macroinvertebrate assemblages of the Okavango Delta, Botswana, was examined to evaluate differences in assemblages at a regional and habitat scale. Sampling was undertaken six times during a one-year cycle from 2005 to 2006, with 228 macroinvertebrates samples... -
Allometric relationships to predict aboveground biomass of 8–10-year-old Eucalyptus grandis × E. nitens in south-eastern Mpumalanga, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: PB van Niekerk --- , South Africa DM Drew --- , South Africa SB Dovey --- , South Africa B du Toit --- , South AfricaSouth Africa is new to the implementation of climate change policies, and the forestry sector in this country is taking ownership of estimating its greenhouse gas inventories. Improving the level of accuracy of carbon stock estimations calls for the population... -
The effect of planting density on the stem form of Pinus patula trees
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: RA Charlton --- , South Africa Z Naghizadeh --- , South Africa A Kunneke --- , South Africa CB Wessels --- , South AfricaIn this study the effect of planting density on the stem form of Pinus patula trees was investigated. Four different spacing treatments of 403, 1 097, 1 808, and 2 981 stems per hectare (spha), and four stem form properties... -
Trends in populations of Blue Crane Anthropoides paradiseus in agricultural landscapes of Western Cape, South Africa, as measured by road counts
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Donella J Young --- , South Africa James A Harrison --- , South AfricaPopulation trends of the Blue Crane Anthropoides paradiseus were monitored by volunteers participating in Coordinated Avifaunal Roadcounts (CAR) in the Overberg and Swartland agricultural regions of the Western Cape province from 1993 and 1996, respectively, until 2019 in the Overberg... -
Effect of added organic substrates on reduction in a soil from the Maputaland Coastal Plain
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Brenton Mabuza --- , South Africa Cornelius Wilhelm van Huyssteen --- , South AfricaWetland soils of the Maputaland Coastal Plain do not exhibit the redox morphology typically associated with extended periods of water saturation. The aim of this paper was to determine if the addition of various organic substrates (buffalo grass, peat, sucrose)... -
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... -
Ecosystem service values of sediment generation and entrapment by marginal coral reefs at Sodwana Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SCS Laing --- , South Africa MH Schleyer --- , South Africa JK Turpie --- , South AfricaCoral reefs provide a multitude of goods and services, some of which are difficult to value due to their intangible nature and the absence of markets to ascribe their relative worth. The coral reefs of Sodwana Bay on the northeast... -
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... -
Wave setup at Tristan da Cunha
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PL Woodworth --- , United KingdomWave setup was investigated using data from tide gauges in a small harbour at the island of Tristan da Cunha in the South Atlantic Ocean. Frequent examples of wave setup were found during the period 1986–1992, but were much less... -
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... -
Rediscovery, range extension, habitat and phylogenetic relation of the endemic Scaled Sandveld Lizard Nucras scalaris Laurent, 1964 (Sauria: Lacertidae) in the central Angolan plateau
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Ninda L Baptista --- Instituto Superior de Ciências da Educação da Huíla (ISCED-Huíla), Angola Krystal A Tolley --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South Africa Marc Bluhm --- Biodiversity, Ecology and Evolution of Plants, Institute of Plant Science and Microbiology, University of Hamburg, Germany Manfred Finckh --- Biodiversity, Ecology and Evolution of Plants, Institute of Plant Science and Microbiology, University of Hamburg, Germany William R Branch --- Port Elizabeth Museum (Bayworld), South AfricaThe Scaled Sandveld Lizard Nucras scalaris Laurent, 1964 is a poorly known lacertid endemic to north-eastern Angola and is only known from the type series collected more than half a century ago. The original description provided a comprehensive morphological description,... -
Restricted breeding habitat of the Critically Endangered White-winged Flufftail in Ethiopia and its conservation implications
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: RB Colyn --- , South Africa MA Howes-Whitecross --- , South Africa C Howes --- , South Africa HA Smit-Robinson --- , South AfricaThe White-winged Flufftail Sarothrura ayresi is considered the most threatened rallid species in Africa and has significant data deficiencies related to population dynamics, ecology and conservation priorities. The Ethiopian Highlands have until recently, been the only known breeding area for... -
Ranging behaviour of Long-crested Eagles Lophaetus occipitalis in human-modified landscapes of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Machawe I Maphalala --- , South Africa Ara Monadjem --- , Eswatini Keith L Bildstein --- , South Africa Shane McPherson --- , South Africa Ben Hoffman --- , South Africa Colleen T Downs --- , South AfricaThe ranging behaviour of raptors in human-altered environments, such as agricultural and suburban landscapes, is becoming increasingly important for conservationists in the context of unprecedented high rates of anthropogenic land use change. We studied the movement ecology of adult Long-crested... -
Rats and prions at Tristan da Cunha Island
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ben J Dilley --- , South Africa Delia Davies --- , South Africa Julian Repetto --- , United Kingdom (South Atlantic Ocean) George Swain --- , United Kingdom (South Atlantic Ocean) Peter G Ryan --- , South AfricaTristan da Cunha is a 96 km2 volcanic island in the South Atlantic Ocean. Black Rats Rattus rattus reached the island from a shipwreck in 1882 and their depredation of seabirds’ eggs and chicks are likely partly responsible for the... -
Challenges in nest monitoring of White-winged Flufftails Sarothrura ayersi in Ethiopia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Melissa A Howes-Whitecross --- , South Africa Caroline Howes --- , South Africa Robin B Colyn --- , South Africa Hanneline A Smit-Robinson --- , South AfricaThe Critically Endangered White-winged Flufftail Sarothrura ayresi is only known to breed in the high-altitude wetlands of Ethiopia and South Africa. Several studies have documented the physical properties of nests in the well-known Berga wetland, Ethiopia; however, behavioural accounts of... -
Quantifying grass productivity using remotely sensed data: an assessment of grassland restoration benefits
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Thulile Vundla --- , South Africa Onisimo Mutanga --- , South Africa Mbulisi Sibanda --- , South AfricaThis study sought to evaluate the utility of remotely sensed data in estimating the impact of wattle invasion and clearance on native grass species productivity using Sentinel-2 multispectral instrument (MSI) imaging and the partial least squares regression (PLSR) algorithm. Therefore... -
Characterisation of ecosystem-based adaptations to drought in the central cattle corridor of Uganda
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Susan Nanfuka --- , Uganda David Mfitumukiza --- , Uganda Anthony Egeru --- , UgandaEcosystems provide climate-change adaptation opportunities including ecosystem services, adaptation benefits and livelihood improvement especially for natural resource dependent communities. To contribute to the understanding of location specific adaptation processes of predominantly agro-pastoralists, a study was carried out in the central... -
Interactive effects of prescribed fire and livestock grazing on Seriphium plumosum in South African sour bushveld
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Michele D Clark --- , United States Carissa L Wonkka --- , United States Urs P Kreuter --- , United States William E Rogers --- , United StatesDocumented increases in woody plant abundance worldwide can reduce land value and grazing capacity. Throughout many grasslands and savannas in South Africa, Seriphium plumosum, an encroaching woody plant, has been rapidly displacing desirable native species. Cost-effective management techniques are required,... -
What grass characteristics drive large herbivore feeding patch selection? A case study from a South African grassland protected area
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Elena Mariotti --- , South Africa Francesca Parrini --- , South Africa Cornelius J Louw --- , South Africa Jason P Marshal --- , South AfricaThe coexistence of a large herbivore community depends on the degree of overlap in the resource used by the different species composing it. We investigated the role of grass greenness, height, biomass and feeding patch status on feeding patch selection... -
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... -
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... -
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... -
A simplified approach to estimate the sustainable lifestyle level for retirement planning
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Elze-Mari Roux --- , South Africa Johann de Villiers --- , South AfricaIn this article we offer a simplified version of the alternative retirement planning model we originally proposed (De Villiers & Roux, 2019). Our method focuses on determining the sustainable lifestyle level (SLL) that an individual can currently afford while still... -
Effect of harvest residue management on soil properties of Eucalyptus hybrid and Acacia mangium plantations planted on steep slopes in northern Vietnam
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Nguyen Van Bich --- , Australia Alieta Eyles --- , Vietnam Daniel Mendham --- , Australia Tran Lam Dong --- , Vietnam Katherine J. Evans --- , Australia Vo Dai Hai --- , Vietnam Caroline Mohammed --- , AustraliaBurning harvest residues during site preparation can compromise the soil-nutrient stock in short-rotation plantations, but this practice remains common in northern Vietnam. This study compared the effect of two contrasting harvest-residue treatments (burning vs retention) on soil total carbon (TC),... -
Inter-annual growth response of three Miombo tree species to climatic effects
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Francis Munalula --- , South Africa Thomas Seifert --- , South Africa Martina Meincken --- , South AfricaMiombo woodlands cover a large part of Southern Africa and contribute an important wood source for the local wood industry. The already observed and further predicted changes in climatic patterns can be expected to affect the wood properties of Miombo... -
Mozambique Island, Cabaceira Pequena and the Wider Swahili World: An Archaeological Perspective
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Diogo V. Oliveira --- , MozambiqueWhen the Portuguese reached Mozambique Island at the end of the fifteenth century, they encountered a populated coast of diverse communities integrated within a wider Swahili world. Swahili society was in its fundamental nature cosmopolitan, and incorporated arts, cultures, peoples,... -
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... -
Application of principles from the International < IR > Framework for including sustainability disclosures within South African integrated reports
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Shelly Herbert --- , South Africa Mark Graham --- , South AfricaWith the introduction of integrated reporting, organisations are now encouraged to integrate sustainability disclosures within their integrated reports, in addition to traditional sustainability reporting practices. The purpose of this study is to investigate whether the International < IR > Framework (the Framework) led to... -
Mass trapping of Coryphodema tristis (Lepidoptera: Cossidae) using a sex pheromone in Eucalyptus nitens compartments in Mpumalanga, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: KP Noeth --- , South Africa PM Verleur --- , South Africa MC Bouwer --- , South Africa JW Crous --- , South Africa J Roux --- , South Africa BP Hurley --- , South Africa B Slippers --- , South AfricaCoryphodema tristis (Lepidoptera: Cossidae) is a native wood-boring moth with a broad host range on both native and non-native vegetation and is an important pest of commercial Eucalyptus nitens plantations in South Africa. Management of C. tristis is challenging since... -
Current and potential threat of psyllids (Hemiptera: Psylloidea) on eucalypts
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Privilege T Makunde --- , South Africa Bernard Slippers --- , South Africa Daniel Burckhardt --- , Switzerland Dalva L de Queiroz --- , Brazil Simon A Lawson --- , Australia Brett P Hurley --- , South AfricaThe introduction of Australian psyllids to non-native ranges across the globe is continually increasing. This is due to an increase in global trade and human movement, exacerbated by climate change. Several psyllids have been recorded as pests of eucalypts in... -
Harnessing the potential of Precision Pest Management in plantation forests
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Bernard Slippers --- , South Africa Brett P Hurley --- , South Africa Jeremy Allison --- , South AfricaThere are numerous new and emerging technologies that allow for greater precision in forest pest management, from sequencing and chemical analyses to data collection through smart technologies, and integration, analysis and sharing of data across fields. These technologies allow for... -
Fungal genomes enhance our understanding of the pathogens affecting trees cultivated in Southern Hemisphere plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MPA Coetzee --- , South Africa QC Santana --- , South Africa ET Steenkamp --- , South Africa BD Wingfield --- , South Africa MJ Wingfield --- , South AfricaForest pathogens are a major cause of forest disturbances and they have a significant economic impact on commercial forestry. Genomics is an important technology now available for studies concerning tree health, enabling researchers to better understand pathosystems and potentially to... -
Spatial and temporal diversity of non-native biofouling species associated with marinas in two Angolan bays
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LB Pestana --- , Brazil GM Dias --- , Brazil AC Marques --- , BrazilArtificial structures in coastal areas provide substrates which facilitate the spread of non-native species. Published records of introduced benthic species in the coastal waters of Angola are scarce, and so far these have numbered 29 non-native species and seven cryptogenic... -
Towed passive acoustic monitoring complements visual survey methods for Heaviside’s dolphins Cephalorhynchus heavisidii in the Namibian Islands Marine Protected Area
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Gridley --- , South Africa MJ Martin --- , South Africa J Slater --- , South Africa J-P Roux --- , Namibia RJ Swift --- , United Kingdom SH Elwen --- , South AfricaThe genus Cephalorhynchus contains four dolphin species, of which three are classified as Near Threatened or Endangered and one subspecies is close to extinction. Understanding the species’ abundance, distributions and habitat preferences is necessary for effective management to prevent further... -
A characterisation of wetland soil types on the Maputaland Coastal Plain
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: ML Pretorius --- , CW van Huyssteen --- , LR Brown --- , AT Grundling --- , CT Downs --- ,This paper addresses the shortage of wetland soil data on the Maputaland Coastal Plain. It does so by investigating the relationship between wetland types, slope position and soil properties. Four wetland types (a valley-bottom system, perched pans, hygrophilous grasslands and... -
Growth and modulus of elasticity of pine species and hybrids three years after planting in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: O Nilsson --- , Sweden G R Hodge --- , USA L J Frampton --- , USA W S Dvorak --- , USA J Bergh --- , SwedenGrowth data and modulus of elasticity (MOE) of 11 different pine species and hybrids were examined at six sites in three regions in South Africa. Growth traits and three MOE variables were measured at three years of age in order... -
Current status of technology-use for plantation re-establishment in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Muedanyi M Ramantswana --- , South Africa Michal P Brink --- , South Africa Keith M Little --- , South Africa Raffaele Spinelli --- , Italy Paxie WC Chirwa --- , South AfricaPlantation re-establishment is a key component of silviculture as it deals with the creation of a suitable environment when planting or seeding a stand. Re-establishment practices include slash management, site preparation, marking and preparation of a planting position, planting, fertilisation... -
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... -
An assessment of the ecological condition of a wetland on the Lions River floodplain based on soil and vegetation parameters, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Ndlovu --- , South Africa DC Kotze --- , South Africa GPW Jewitt --- , South Africa CD Morris --- , South AfricaWetlands are increasingly exposed to human activities, resulting in degradation. As the wetland degrades, it loses functionality. In South Africa, wetlands can play an important water-regulating role. This study aims to establish the ecological condition of a historically utilised wetland... -
Diel and tidal periodicity in the responses of early life stages of marine fishes to an estuary opening event in temperate South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Y Kisten --- , South Africa NA Strydom --- , South AfricaEarly life stages of fish were monitored in a breach channel during an opening event of the temporarily open/closed East Kleinemonde Estuary. For comparison, early life stages were also collected in the surf zone and estuary mouth region before, during... -
Ten research questions to support South Africa’s Inland Fisheries Policy
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OLF Weyl --- , South Africa L Barkhuizen --- , South Africa K Christison --- , South Africa T Dalu --- , South Africa HA Hlungwani --- , South Africa D Impson --- , South Africa K Sankar --- , South Africa NE Mandrak --- , Canada SM Marr --- , South Africa JR Sara --- , South Africa NJ Smit --- , South Africa D Tweddle --- , South Africa NG Vine --- , South Africa V Wepener --- , South Africa M Zvavahera --- , South Africa IG Cowx --- , United KingdomSouth Africa is in the process of developing a National Freshwater (Inland) Wild Capture Fisheries Policy. A properly focused research strategy is essential to guide the policy development process, and thus a dedicated ‘Inland Fisheries’ workshop was convened by the... -
Impact of livestock grazing intensity on plant diversity of montane grassland in the northern Drakensberg, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TA Shezi --- , South Africa TG O’Connor --- , South Africa ETF Witkowski --- , South AfricaCommunal livestock grazing is expected to impact botanical composition and plant diversity of Drakensberg montane grasslands. Accordingly, a grazing gradient extending outward from kraals, and fence-line contrasts between communal rangeland and protected areas (Golden Gate Highlands National Park and Royal... -
Grass functional trait responses to experimental warming and fire in Afromontane grasslands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mariska te Beest --- , The Netherlands Anne Kleinjan --- , The Netherlands Veerle Tuijnman --- , The Netherlands Nicky Findlay --- , The Netherlands Thembeka Mvelase --- , South Africa Elizabeth le Roux --- , United Kingdom Michelle Tedder --- , South Africa Paul Gordijn --- , South Africa Susan Janse van Rensburg --- , South AfricaClimate change is one of the main challenges facing humanity in the coming century. To understand the impact of climate change on biodiversity and ecosystem functioning, we urgently require a better understanding of plant responses to climate change. To address... -
Community diversity, functional traits and adaptation of Stipa tenacissima L. under different grazing regimes in a North African arid montane rangeland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jamila Msadek --- , Tunisia Abderrazak Tlili --- , Tunisia Marwa Moumni --- , Tunisia Mounir Louhaichi --- , Tunisia Mohamed Tarhouni --- , TunisiaThe mountain rangeland chain of Matmata (southern Tunisia) is characterised by an arid Mediterranean climate with severe droughts and high temperatures, combined with substantial human disturbance. In order to withstand these harsh conditions, plants have developed adaptive strategies and functional... -
Accounting for land cover changes and degradation in the Katse and Mohale Dam catchments of the Lesotho highlands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jane Turpie --- , South Africa Grant Benn --- , South Africa Mark Thompson --- , South Africa Nigel Barker --- , South AfricaRangeland conditions in the Lesotho highland dam catchment areas is important for local livelihoods and regional water supply. We investigated changes in land cover and condition from 1991 (before construction) to 2013, using Landsat imagery. The Normalised Difference Vegetation Index... -
Phytomass and ecological significance of Chrysocoma ciliata L. within the Lets’eng-la-Letsie catchment area of Lesotho, southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: GN Smit --- , South Africa G Janse van Rensburg --- , South AfricaThe Lets’eng-la-Letsie wetland is an official Ramsar site, but the wetland and upland catchment areas suffer from overgrazing, erosion and over exploitation. Chrysocoma ciliata has a reputation as an unpalatable invader and is particularly common on the drier northern slopes... -
Assessing wetland functionality using soil surface indicators in Letšeng- la-Letsie wetland in Quthing District, Lesotho
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Nthuseng Kahlolo --- , Lesotho Botle Mapeshoane --- , Lesotho Peter Chatanga --- , Lesotho Lerato Seleteng-Kose --- , Lesotho Makoala V Marake --- , LesothoWetlands are globally valuable ecosystems as they provide many important services to the human society, yet the ecology of some of them is yet to be understood. This study assessed the functionality of Letšeng-la-Letsie wetland in Lesotho, using the Landscape... -
A case study of rangeland vegetation changes from 1979 to 2016 in the Middle Atlas Mountains of Morocco
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: A El Aich --- , Morocco ME Fernández-Giménez --- , United States M Rouzi --- , Morocco CL Alados --- , SpainThis case study assessed changes in vegetation composition of a 0.8 ha rangeland site over the past four decades, in relation to changes in temperature and to an increase in grazing pressure. The frequency and standing crop (biomass) of species... -
Changes in pastoral mobility in a semi-arid montane region of South Africa: The role of policy and legislation
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Igshaan Samuels --- , South Africa Nicky Allsopp --- , South Africa M Timm Hoffman --- , South AfricaLegislation and policy are key tools used by governments to change the socio-economic and political landscape of agrarian systems with consequences for mobile pastoralism. This study used the social-ecological systems framework to examine how pastoral mobility in the semi-arid, montane... -
The psychosocial determinants of the intention to test for HIV among young men in KwaZulu-Natal province, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Thabang Manyaapelo --- , South Africa Robert AC Ruiter --- , The Netherlands Sibusiso Sifunda --- , South Africa Anam Nyembezi --- , South Africa Bart van den Borne --- , The Netherlands Priscilla Reddy --- , South AfricaBackground: Voluntary counselling and testing is one of the effective prevention strategies against the HIV/AIDS epidemic. This study investigated the psychosocial determinants of the intention to be tested for HIV among young men in South Africa’s KwaZulu-Natal province using the... -
Intention to use High Speed Rail (HSR) in Ghana: A comparative study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Frank Ebo Sagoe --- , China Ying Teng --- , China Joy Say --- , China Lawrence Sagoe --- , Ghana Anita Sagoe --- , Ghana Muhammad Hashim Shah --- , ChinaThis exploratory study aimed to examine the intention of people to use High Speed Rail (HSR) in Ghana premised on convenience, traveling time reliability, and transport safety. Participants were a convenience sample of 957 public transportation users (female = 40.6%;... -
Biomass-based value chain analysis of plantain in two regions in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Charles Tortoe --- , Ghana Wilhelmina Quaye --- , Ghana Paa Toah Akonor --- , Ghana Charlotte Oduro Yeboah --- , Ghana Evelyn Serwah Buckman --- , Ghana Nana Yamoah Asafu-Adjaye --- , GhanaPlantain biomass value chain analysis was conducted to generate benchmark information that supports reduction of post-harvest losses of plantain and to identify value-added opportunities and linkages to new markets in Ghana. Specifically, this study sought to identify the actors and... -
Demersal fish communities in KwaZulu-Natal, South Africa, indicate partial congruence with proposed conservation biozones
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WN Dalton --- , South Africa SN Porter --- , South Africa T-C Livingstone --- , South Africa BQ Mann --- , South AfricaThe KwaZulu-Natal shelf, on the east coast of South Africa, is inhabited by diverse communities of demersal fishes; however, previous studies deeper than 30 m have largely investigated these with extractive techniques. Using baited remote underwater videos (BRUVs), this study... -
Analysing species site-specific tree growth, mortality and in-growth for miombo woodlands in Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: E E Njoghomi --- , Tanzania S Valkonen --- , K Karlsson --- ,The silvicultural information base for the development of management regimes for Tanzanian miombo woodlands is underdeveloped. The limited and fragmented information on tree growth and stand dynamics has constrained the progress of sustainable management in these woodlands. Therefore, this study... -
Perspectives and drivers of modernisation of silviculture re-establishment in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Muedanyi Ramantswana --- , South Africa Michal Brink --- , South Africa Keith Little --- , South Africa Raffaele Spinelli --- , Italy Paxie Chirwa --- , South AfricaEfficient and cost-effective re-establishment practices are important parts of any sustainable forest re-establishment programme. Re-establishment activities include residue management (post-harvest slash), preparation of a planting position, planting, fertilisation and vegetation management. In South Africa, these activities are largely labour intensive,... -
South African raptors in urban landscapes: a review
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Shane C McPherson --- , South Africa Petra Sumasgutner --- , Austria Colleen T Downs --- , South AfricaGlobally, but especially in Africa, increasing human populations and anthropogenic land-use change are generally affecting diversity negatively. Urban environments in southern Africa typically comprise a mosaic landscape of anthropogenic infrastructure with some green spaces. These urban cities have a range... -
Urban areas have lower species richness, but maintain functional diversity: insights from the African Bird Atlas Project
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Alan Tristram Kenneth Lee --- , South Africa Ulf Ottosson --- , Nigeria Colin Jackson --- , Kenya Sidney Shema --- , Kenya Chevonne Reynolds --- , South AfricaHigh human population growth and rapid urbanisation, particularly in Africa, have led to an increased interest in the impacts of this land-use change on bird communities. The African Bird Atlas Project, where species presence lists are collected in pentads, is... -
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... -
Does defoliation frequency and severity influence plant productivity? The role of grazing management and soil nutrients
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Zander S Venter --- , Norway Heidi-Jayne Hawkins --- , South Africa Michael D Cramer --- , South AfricaRangeland management approaches, including rotational grazing, rely on assumptions about plant growth responses to the intensity, or severity (sward height) plus frequency, of defoliation. We tested these assumptions at the farm, patch and plant scale using data from a grazing... -
Land reform and its impact on the arid South African environment: Riemvasmaak as a case study
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: GS Fleury --- , South Africa MT Hoffman --- , South Africa SW Todd --- , South AfricaThe 75 000 ha, hyper-arid area of Riemvasmaak represents one of the first land restitution cases in post-apartheid South Africa. People who were forcibly removed in 1974 were resettled in 1995. We describe the impact that people and domestic livestock... -
Is a long hygroscopic awn an advantage for Themeda triandra in drier areas?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Craig D Morris --- , South AfricaThemeda triandra has bigeniculate hygroscopic lemma seed awns that twist when wet and drying, thereby transporting the caryopsis across the soil surface into suitable germination microsites. The prediction that awns would be longer in drier grassland and have greater motility... -
Effect of encroaching woody plant species on soil nutrients and selected soil chemical properties in communally managed semiarid savanna grazing lands in the North West province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Pieter W Malan --- , South Africa Makuété A P Tiawoun --- , South Africa Khumoetsile S Molatlhegi --- , South Africa Simeon A Materechera --- , South AfricaWoody plant encroachment is recognised as one of the major threats to biodiversity in ecosystems. In many arid and semiarid areas of South Africa, indigenous encroacher species are proliferating, but the factors that favor their abundance are poorly understood. This... -
The opinion of KwaZulu-Natal dietitians regarding the use of a whole-foods plant-based diet in the management of non-communicable diseases
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: LM Janse Van Rensburg --- , South Africa NL Wiles --- , South AfricaBackground: International studies have highlighted the benefit of using a whole-food, plant-based diet (WFPBD) in the prevention and treatment of non-communicable diseases (NCDs). It is imperative to gather the opinions of dietitians on this diet, in order to assess whether... -
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... -
Metabarcoding of marine zooplankton in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Singh --- , South Africa JC Groeneveld --- , South Africa J Huggett --- , South Africa D Naidoo --- , South Africa R Cedras --- , South Africa S Willows-Munro --- , South AfricaMetabarcoding is an emerging method in which DNA barcoding is combined with next-generation sequencing to determine the biodiversity of taxonomically complex samples. We assessed the current state of DNA barcode reference databases for marine zooplankton in South Africa and undertook... -
Taxonomic revision of the Jita snakes (Lamprophiidae: Boaedon) from São Tomé and Príncipe (Gulf of Guinea), with the description of a new species
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Luis MP Ceríaco --- Museu de História Natural e da Ciência da Universidade do Porto, Portugal Ana Lisette Arellano --- Golden Gate National Parks Conservancy, USA Robert C Jadin --- University of Wisconsin Stevens Point, Wisconsin, USA Mariana P Marques --- Universidade de Lisboa, Portugal Diogo Parrinha --- Universidade de Lisboa, Portugal Jakob Hallermann --- Universität Hamburg, GermanyThe taxonomic status of the São Tomé and Príncipe islands ‘Cobras Jitas’, genus Boaedon, has been a subject of confusion. Historically, these island populations have been referred to as part of either the Boaedon fuliginosus species complex or Boaedon capensis... -
Leopard tortoise Stigmochelys pardalis (Bell, 1928) mortality caused by electrified fences in central South Africa and its impact on tortoise demography
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Sharon Holt --- National Museum, South Africa Liora Kolska Horwitz --- The Hebrew University, Israel Beryl Wilson --- McGregor Museum, South Africa Daryl Codron --- University of the Free State, South AfricaThe leopard tortoise (Stigmochelys pardalis) is among the most ubiquitously distributed chelonian species in Africa. As with other chelonians, however, the species’ slow growth rate, coupled with low survivorship of juveniles, make it susceptible to declines under regimes of environmental... -
Potentials of leys or pasture-based forage production in Nigeria
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Saheed Olaide Jimoh --- , China Yunusa Muhammad Ishiaku --- , Nigeria Tracy Burnett --- , United States Ahmed Adeyemi Amisu --- , Nigeria Rasheed Adekunle Adebayo --- , South AfricaFulani pastoralists are widely distributed across the six geographical zones of Nigeria and migrate from north to south in search of natural grazing lands at times of forage scarcity. This migration leads annually to resource use conflict and deadly attacks... -
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,... -
First report of glyphosate and paraquat resistance in two Plantago biotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vhuthu Ndou --- , South Africa Frederick Eksteen --- , Ethel Phiri --- , South Africa Petrus J Pieterse --- , South AfricaResistance to glyphosate in plantago (Plantago lanceolata L.), a serious weed in South Africa, was confirmed in 2003. More recently, a plantago biotype that is putatively resistant to both glyphosate and paraquat was reported. Seeds from a putatively susceptible (S)... -
Body composition of HIV-positive candidates for and recipients of a kidney transplant: comparative analysis between DEXA and anthropometric indices
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: CJ Martin --- , South Africa E Muller --- , South Africa D Labadarios --- , South Africa FJ Veldman --- , South Africa SM Kassier --- , South AfricaObjective: To determine body composition (BC) and the correlation, if any, between indices measured by anthropometry and dual-energy X-ray absorptiometry (DEXA). -
Knowledge, attitude and practices of patients receiving maintenance haemodialysis in Bloemfontein, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: HC Spies --- , South Africa VL van den Berg --- , South Africa M Nel --- , South AfricaIntroduction: In sub-Saharan Africa, a paucity of data exists in respect of the knowledge, attitudes and practices (KAP) of patients on maintenance haemodialysis (MHD) regarding the dietary adaptations they should make. -
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... -
Bull shark Carcharhinus leucas recruitment into the St Lucia Estuary, South Africa, after prolonged mouth closure, and the first observation of a neonate bull shark preyed on by a Nile crocodile Crocodylus niloticus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Daly --- , South Africa P Le Noury --- , United Kingdom TN Hempson --- , Mozambique M Ziembicki --- , Mozambique JM Olbers --- , South Africa GM Brokensha --- , South Africa BQ Mann --- , South AfricaEstuaries provide critical nursery habitat for juvenile bull sharks Carcharhinus leucas, as they have the ability to withstand a wide range of salinities. St Lucia is the largest estuarine lake in Africa and was once a key nursery for bull... -
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... -
A review of the populations of tilapiine species in lakes Victoria and Naivasha, East Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Edwine Yongo --- , Kenya Laurent Cishahayo --- , Peoples Republic of China Eunice Mutethya --- , Kenya Bonface Mnang’at Alkamoi --- , Kenya Kokwon Costa --- , Kenya Nzeyimana Jean Bosco --- , Peoples Republic of ChinaThis paper discusses the catch trends, population attributes and biological characteristics of tilapiine species that are both native and that have been introduced into Lake Victoria and Lake Naivasha. Predation by Lates niloticus, species hybridisation, overfishing, pollution and eutrophication have... -
Predictions of chlorophyll concentrations in the leaves of seedlings of two congeneric tropical trees from RGB digital image components
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Marcelo Schramm Mielke --- , Brazil Luciana Santos Lobo --- , Brazil Geane Santos da Costa --- , Brazil Ana Cristina Schilling --- , Brazil Martielly Santana dos Santos --- , Brazil Ândrea Carla Dalmolin --- , BrazilThe segmentation of digital images in red, green and blue (RGB) components is a low-cost method for monitoring leaf chlorophyll concentrations and seedling quality. The two congeneric species, Cariniana legalis and C. estrellensis, are distinguished based on differences in bark... -
Rural community use and perception of rangeland products in Eastern Cape Province, South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Lwandiso Mdiya --- , South Africa Amon Taruvinga --- , South Africa Abbyssinia Mushunje --- , South Africa Keletso Mopipi --- , South Africa Saul Ngarava --- , South AfricaThe significance of rangelands to the welfare of the rural poor has been acknowledged. The study explores perceptions and determinants of rural households’ rangeland harvesting. A cross-sectional survey of 159 rural households harvesting communal rangeland products was utilized, as well... -
Dazzled by the light: the impact of light pollution from ships on seabirds at Tristan da Cunha
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Peter G Ryan --- , South Africa E Molly Ryan --- , South Africa James P Glass --- ,Most of the millions of burrow-nesting petrels that breed at Tristan da Cunha are susceptible to light pollution. On dark, misty nights, petrels become disoriented by artificial lights, mainly from ships. From 2013 to 2021 at least 1 823 petrels... -
Rotifers in the Niger River, Niger: diversity and abundance in relation to environmental parameters
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Souley Adamou --- , France B Alhou --- , Niger M Tackx --- , France F Azémar --- , FranceA first study of the rotifers of the Niger River in Niger is reported here. Two surveys took place under contrasting hydrological conditions: low-water level (16 April to 8 May 2018) and high-water level (1 to 15 February 2019). Zooplankton... -
Assessment of river health using benthic macroinvertebrates in the Dwars River, Olifants Water Management Area, Limpopo province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TV Mmako --- , South Africa A Addo-Bediako --- , South Africa WJ Luus-Powell --- , South Africa M Kekana --- , South AfricaThe study assessed the impact of water and sediment quality on benthic macroinvertebrate assemblages in the Dwars River, a tributary of the Olifants River, Limpopo province, South Africa. Physico-chemical variables, heavy metals and macroinvertebrates were collected using standard methods. A... -
Seasonal variation and drivers of zooplankton, macroinvertebrate and littoral fish communities from irrigation ponds in a semi-arid region in the Eastern Cape (South Africa)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mofu --- , South Africa T Dalu --- , South Africa RJ Wasserman --- , South Africa DJ Woodford --- , South Africa D Khosa --- , South Africa OLF Weyl --- , South AfricaIrrigation ponds are increasingly abundant globally, particularly in water-stressed countries with limited natural surface waters, yet knowledge of their ecology is limited. Here, we assessed zooplankton, macroinvertebrate, and littoral fish communities from irrigation ponds located in the Sundays River Valley... -
Conservation Agriculture in rainfed annual crop production in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: JA Strauss --- , South Africa PA Swanepoel --- , South Africa MC Laker --- , South Africa HJ Smith --- , South AfricaPressures from population growth, changing diets and climate change are driving transformation of our global food production to ensure more efficient, reliable and sustainable production. In South Africa, arable land for crop production and permanent pastures accounts for 10–12% of... -
Soil fertility trends and management in Conservation Agriculture: a South African perspective
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: GP Nortjé --- , South Africa MC Laker --- , South AfricaConservation Agriculture (CA) is an integrated approach that consists of a suite of practices, namely no-till farming, cover crops, and crop rotation that includes at least three crops. In the global context, CA is implemented widely in South America (Argentina... -
A history of Conservation Agriculture in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: JA Strauss --- , South Africa PA Swanepoel --- , South Africa H Smith --- , South Africa EH Smit --- , South AfricaConservation Agriculture (CA) is a holistic farming system aimed at the conservation of natural resources by halting soil erosion and increasing biodiversity in cropping systems, while still effecting sustainable production. Conservation agriculture is based on three principles, namely minimum soil... -
Importance of detailed soil surveys for Conservation Agriculture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: JL Schoeman --- , E Verster --- , HB Booyens --- , MJ du Plessis --- ,This paper explores the role that detailed soil surveys can play in Conservation Agriculture (CA). While it is widely acknowledged that CA practices have to be adapted to local conditions, it appears as if in-field physical soil and hydrological properties,... -
The effects of tree canopies on invasive Lantana camara: a follow-up study 18 years later
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Kiersten McMahon --- , United States David Ward --- , United StatesLantana camara is primarily a bird-dispersed invasive plant species that has spread quickly across South Africa in disturbed areas. We re-examined the distribution of Lantana at Rodger and Twine’s (2002) study site (R&T) in a highly grazed communal area and... -
Shortwave infrared vegetation index-based modelling for aboveground vegetation biomass assessment in the arid steppes of Algeria
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Louaï Benseghir --- , Algeria Nour El Islam Bachari --- , AlgeriaSelecting the appropriate vegetation index for accurate biomass estimation is a prerequisite before and during the ecosystem management project. This study, aims to compare Vegetation Indices (VIs) that are combining both Visible and Near Infrared OLI bands (VNIR-VIs), Visible and... -
Nutritional management of a polytrauma patient in an intensive care unit
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Lisa Burgdorf --- , South AfricaA 32-year-old male was admitted to hospital with multiple injuries following a quadbike accident. Treatment of the patient included a left arm amputation, a right hemicolectomy and end ileostomy, and the orthopaedic management of a left femur fracture and degloving... -
Increased resolution of soils information through morphon segmentation of the Korentepoort mountain catchment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: GJ Malan --- , South Africa WP De Clercq --- , South Africa AB Rozanov --- , South Africa C Clarke --- , South Africa H Helness --- , Norway S Damman --- , Norway N Elema --- , South Africa J Atkinson --- , South AfricaRecent climate instability necessitates a fresh approach to water cycle services in the Hessequa municipal region. Attention is drawn to impacts on water storage in this region, and an assessment of the current status is necessary. Land-use change and soil... -
Early growth and development of maize on sandy soils fertilised with zinc sources at different application rates
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: LF van Straaten --- , South Africa CF Wessels --- , South Africa GM Ceronio --- , South Africa CC du Preez --- , South AfricaThe grain yield and quality of maize is often negatively influenced by zinc (Zn) deficiencies during early growth and development. Application of Zn to soil is therefore a necessity, especially when it is sandy. Glasshouse experiments were carried out to... -
Pigeonpea production constraints and farmers’ trait preferences in Malawi: implications for variety design
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Esnart Nyirenda Yohane --- , South Africa Hussein Shimelis --- , South Africa Mark Laing --- , South Africa Admire Shayanowako --- , South Africa Isack Mathew --- , South Africa Justus M Chintu --- , MalawiPigeonpea Cajanus cajan (L.) Millsp. is the most important legume cash crop grown in Malawi. However, productivity is low due to biotic and abiotic stresses and socioeconomic constraints. The objectives of this study were to determine farmers’ perceived constraints to... -
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... -
Contrasting effects of soil pH on seed germination and early seedling growth of Calobota sericea and Lessertia frutescens subs. frutescens
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Francuois L Müller --- ,This study evaluated the impacts of pH on the germination and early seedling growth of Calobota sericea and Lessertia frutescens subsp. frutescens, two perennial legume species found in the semi-arid rangelands of South Africa. The results of this study revealed... -
Goat feeds and feeding practises in a semi-arid smallholder farming system in Zimbabwe
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Takudzwa Charambira --- , Zimbabwe Shelton M Kagande --- , Zimbabwe Irenie Chakoma --- , Zimbabwe Gwinyai Chibaira --- , Zimbabwe Prisca H Mugabe --- , ZimbabweThis study was conducted to identify the available goat feed resources for smallholder farmers in the semi-arid region of Zimbabwe. An ecological rangeland assessment was combined with participatory research methods to determine the diversity of feed resources in two wards... -
Suicidal ideation, plans, and attempts: Prevalence and associated factors in school-going adolescents in Sierra Leone in 2017
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- , South Africa Supa Pengpid --- , ThailandThe study aimed to assess the prevalence and correlates of suicidal ideation, plans, and attempts among middle school students in Sierra Leone. We accessed an existing data set of 2 798 adolescents (median age = 15 years) that responded to... -
Multi-asset allocation of exchange traded funds: Application of Black–Litterman model
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Mei-Ling Tang --- , Taiwan Feng-Yu Wu --- , Taiwan Ming-Chin Hung --- , TaiwanThe Black–Litterman (BL) model allows investors to apply their subjective views to asset allocation optimisation. In this study, we construct a multi-asset allocation portfolio of iShares exchange traded funds (ETFs) using mean–variance (MV) and BL models. Two investment strategies, namely... -
Population parameters, exploitation rate and diet of black-chinned Tilapia, Sarotherodon melanotheron Rüppell, 1852 (Pisces: Cichlidae), from Badagry Creek, Lagos, Nigeria
Item type: Journal Article • Journal: African Zoology • Authors: Prince Emeka Ndimele --- , Nigeria Fatai Gbolahan Owodeinde --- , Nigeria Edwin Oritseweyinmi Clarke --- , Nigeria Olufemi Olusegun Whenu --- , Nigeria Olufemi Olabode Joseph --- , NigeriaThe black-chinned tilapia (Sarotherodon melanotheron) is a member of the cichlid family, which can be cultured to complement the output from a predominantly catfish aquaculture industry in Nigeria. In order to achieve this objective, it is important to study the... -
Mountain refugia limit anthropogenic suppression in a re-established felid population: the case of the Magaliesberg leopard population in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: R John Power --- , South Africa Matt S Rogan --- , South Africa Vincent N Naude --- , South AfricaAlthough highly adaptable, leopards incur substantial mortality in human-modified landscapes and generally subsist at lower densities than in protected areas. Leopard populations are difficult to enumerate across any landscapes, though there have been strides to improve upon this, particularly in... -
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... -
Dropping plates to pick up aliens: towards a standardised approach for monitoring alien fouling species
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TG Loureiro --- , South Africa K Peters --- , South Africa TB Robinson --- , South AfricaBiological invasions pose a major threat to biodiversity and significant investment is required to prevent the introduction of alien species, contain introduced populations and mitigate associated impacts. The implementation of standardised long-term monitoring programmes enables the early identification of new... -
Distribution and community structure of at-risk and Data Deficient elasmobranchs in Zavora Bay, Mozambique
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B O’Connor --- , The Netherlands N Cullain --- , United StatesPersistent threats from fishing pressure and increasing habitat degradation, as well as slow recovery rates resulting from K-selected life histories, are putting increasing numbers of elasmobranch species (sharks, rays and skates) at risk of extinction worldwide. Global declines in elasmobranch... -
Occurrence of putatively resistant plantago in the winter rainfall region of South Africa: a survey
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vhuthu Ndou --- , South Africa Ethel E Phiri --- , South Africa Frederik H Eksteen --- , Petrus J Pieterse --- , South AfricaGlobally glyphosate is the most widely used herbicide. The alternative in many cropping situations is paraquat. After many years of success, neither herbicide could control plantago (Plantago lanceolata L., also ‘English plantain’) in Robertson. A survey was carried out by... -
Local variations in the response of birds to human presence in urban areas
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tristan Nyatanga --- , Zimbabwe Henry Ndaimani --- , South Africa Tanyaradzwa Gaza --- , ZimbabweStudies that seek to understand the local variations in the response of birds to human disturbance in urban areas are important for conservation. This article investigated the contribution of human population density in the different urban land use zones of... -
The effects of habitat loss and fragmentation on updated estimates of the population of the Agulhas Long-billed Lark Certhilauda brevirostris, a South African endemic
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Steven W Evans --- , South AfricaThe Agulhas Long-billed Lark Certhilauda brevirostris is a South African endemic and is restricted to the fynbos habitat of the Agulhas Plain in the southwestern corner of South Africa. The 1990, 2014, and 2018 land use land cover (LULC) databases... -
The effect of adjacent vegetation on fire severity in Afrotemperate forest along the southern Cape coast of South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Brandon Giddey --- , South Africa Johan A Baard --- , South Africa Lufuno Vhengani --- , South Africa Tineke Kraaij --- , South AfricaRecently two large wildfires (around the towns of Knysna in 2017 and George in 2018) jointly burnt over 80 000 ha in the southern Cape, South Africa. Here, patches of closed-canopy Afrotemperate forest occur within a matrix of fire-prone (native)... -
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... -
Altered urban landscape: Shedding light on conflicts in a landfill community in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ebenezer Owusu-Sekyere --- , GhanaThe challenge of solid waste management has been subjected to a variety of reactions and interpretations: strange mixtures of neglect and misconceptions of what could be the way forward. Over the years, Ghanaian authorities have problematized issues of waste management... -
Effect of livestock farmers’ access to formal markets on marketing inefficiency in Mpumalanga province, South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Malika Sehar --- , South Africa Abayomi Samuel Oyekale --- , South AfricaLivestock production is the primary source of livelihood for most farmers in Mpumalanga province. Small-scale farmers in the province are facing many challenges in the course of marketing livestock. These challenges have also hindered their efforts at improving their livelihood... -
Productivity curve models in eucalypt timber forwarding
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Irineu Barros Nunes --- , Brazil Eduardo da Silva Lopes --- , Brazil Millana Bürger Pagnussat --- , Brazil Julio Eduardo Arce --- , BrazilExtraction is the most costly and complicated stage of timber harvest operations. The forwarder’s productive capacity in timber harvesting, from planted forests, is influenced by several operational variables, especially by extraction distance and tree volume. Prior knowledge about the effect... -
Optimisation of micropropagation protocols for temperate eucalypt hybrids in South Africa, with a focus on auxin transport proteins
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rafael Keret --- , South Africa Muhammad Nakhooda --- , South Africa Nicoletta B Jones --- , South Africa Paul N Hills --- , South AfricaGlobally the demand for forestry resources is booming, and consequently innovative approaches to cultivate valuable hardwoods, such as eucalypts, are crucial. Although micropropagation offers a means to clonally propagate desirable cultivars, this technique is often variety-specific for eucalypts. Thus, recalcitrant... -
Machine learning techniques to estimate mechanised forest cutting productivity
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Saulo Boldrini Gonçalves --- , Brazil Nilton Cesar Fiedler --- , Brazil Jeferson Pereira Martins Silva --- , Brazil Gilson Fernandes da Silva --- , Brazil Mayra Luiza Marques da Silva --- , Brazil Luciano José Minette --- , Brazil Daniel Pena Pereira --- , Brazil Domingos Manuel Mendes Lopes --- , Portugal Evandro Ferreira da Silva --- , Brazil Antônio Henrique Cordeiro Ramalho --- , Brazil Jeangelis Silva Santos --- , Brazil Marcelo Otone Aguiar --- , Brazil Jose de Oliveira Melo Neto --- , Brazil Renisson Neponuceno de Araújo Filho --- , BrazilThe productivity of wood harvesting operations is one of the main viability indicators of the forestry enterprise, which is directly influenced by land, population, and operational planning characteristics. The variables that affect the productivity of harvesting machines are particularly difficult... -
Charcoal heaps volume estimation based on unmanned aerial vehicles
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Luiza Marina Esteves de Carvalho --- , Brazil Alessandra Melo --- , Brazil Glauco José de Matos Umbelino --- , Brazil Jan-Peter Mund --- , Germany Jhonathan Gomes dos Santos --- , Brazil Jacqueline Rosette --- , United Kingdom Daniel Silveira --- , São Paulo Eric Bastos Gorgens --- , BrazilThe charcoal stock in a forestry business is controlled based on the theoretical capacity of the masonry ovens (input) and shipped trucks (output). During the year, the company must monitor the stock for accountability reports and internal governance. This paper... -
A laissez-faire management approach in a grassland landscape results in a fine-scale, spatio-temporally heterogeneous fire pattern
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Marc E Stalmans --- , South Africa Ed TF Witkowski --- , South Africa Kevin Balkwill --- , South AfricaWhat are the spatio-temporal characteristics of a fire pattern that is allowed to develop over time across a species- rich, predominantly grassy landscape? More than 1 300 fires were documented over 13 years in the 48 000 ha Songimvelo Game... -
Intentions behind common and risky fires in south-eastern Tanzania
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ellie Wood --- , United Kingdom Mercy Mgaya --- , United Republic of Tanzania Christopher Andrews --- , United Kingdom Kate Schreckenberg --- , United Kingdom Janet A Fisher --- , United Kingdom Isla Grundy --- , Casey M Ryan --- , United KingdomHuman-set fires are a crucial component of African savannas, affecting ecosystem structure, carbon emissions, local hazards and livelihoods. Yet, most fire research in these ecosystems focuses on the fire ecology of protected areas. Research exploring fire regimes in inhabited landscapes... -
High-intensity fire experiments to manage shrub encroachment: lessons learned in South Africa and the United States
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Rheinhardt Scholtz --- , United States Victoria M Donovan --- , United States Tercia Strydom --- , South Africa Carissa Wonkka --- , United States Urs P Kreuter --- , United States William E Rogers --- , United States Charles Taylor --- , United States Izak PJ Smit --- , South Africa Navashni Govender --- , South Africa Winston Trollope --- , South Africa Dillon T Fogarty --- , United States Dirac Twidwell --- , United StatesHuman alteration of fire regimes is a hallmark of the Anthropocene; yet few studies have fully explored the implications of utilizing high-intensity fires in grasslands and savannas to manage shrub encroachment. Decades of fire research in South Africa inspired a... -
Tipping the scales: how fire controls the balance among functional groups in Angolan grasslands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Paulina Meller --- , Germany Raquel Frazão --- , Germany Fernanda Lages --- , Angola Norbert Jürgens --- , Germany Manfred Finckh --- , GermanyFire plays an important role in the ecology of tropical grasslands globally. However, detailed studies comparing the response of plant functional groups to fire seasonality, and thus phenological timing, are scarce from humid Afrotropical grasslands. Such information, however, is crucial... -
Long-term frequent fires do not decrease topsoil carbon and nitrogen in an Afromontane grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Nicola Findlay --- , The Netherlands Alan Manson --- , South Africa Joris PGM Cromsigt --- , The Netherlands Paul Gordijn --- , South Africa Cathy Nixon --- , South Africa Max Rietkerk --- , The Netherlands Guy Thibaud --- , South Africa Martin J Wassen --- , The Netherlands Mariska te Beest --- , The NetherlandsFire has been an integral evolutionary force shaping and maintaining grassy biomes, such as the Afromontane grasslands of South Africa. Afromontane grasslands represent a large carbon reservoir, but it is uncertain how fire affects their long-term C storage. We investigated... -
The effect of changes in human drivers on the fire regimes of South African grassland and savanna environments over the past 100 years
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: James R Puttick --- , South Africa M Timm Hoffman --- , South Africa Timothy G O’Connor --- , South AfricaFire is a key regulator of tree cover in grassy ecosystems, but century-long changes in fire regimes have not been explicitly quantified in South Africa. This study aimed to determine changes in the fire regimes of South Africa’s grassy biomes... -
Too much, too late: fires and reactive wildfire management in northern Botswana’s forests and woodland savannas
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: L Cassidy --- , Botswana JS Perkins --- , Botswana J Bradley --- , BotswanaAcross much of southern Africa’s savanna wildernesses, wildfires burn unchecked. This is particularly true in the woodland savannas of northern Botswana, where wildfires originate outside of management activities, and are left to burn uncontrolled, because of limited resources and remoteness... -
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... -
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... -
Structural assemblages of plant species in the Owabi Ramsar Wetland in the Ashanti Region of Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Collins A Nsor --- , Ghana Rockson Acolatse --- , Ghana John N Mensah --- , Ghana Samuel K Oppong --- , Ghana Daniel Dompreh --- , Ghana Louis Addai-Wireko --- , GhanaAnthropogenic activities as predictors of species assemblages in the Owabi Ramsar Wetland were investigated between May and September 2019. Data were collected in 154 plots at five different sites. The prevalence index method was used to categorise the species into... -
Traditional authorities, legal power and land disputes in north-west Namibia
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Kana Miyamoto --- , JapanThis study considers the revitalisation of traditional authorities, a phenomenon found throughout modern Africa. It analyses and compares court cases involving land disputes amongst herders living in north-western Namibia. Since the 1990s, African nations have pursued land reform to stabilise... -
Swahili Seafarers’ Musings and Sensuous Seascapes in Yvonne Owuor’s The Dragonfly Sea
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Jauquelyne Kosgei --- , South AfricaThis paper provides an analysis of Yvonne Owuor’s The Dragonfly Sea (2019) with a focus on local knowledges of the sea that shore folk and seafarers from Pate Island on the Kenyan coast possess. Attention is paid to how these... -
Comparative avifaunal richness and diversity in invasive Acacia dealbata patches and adjacent montane grasslands
Item type: Journal Article • Journal: African Zoology • Authors: Jessica Seath --- , South Africa Charlie Shackleton --- , South AfricaInvasive alien species are regarded as the second greatest threat to biodiversity globally. Yet, at a local scale their effects may vary, underlying the requirement for more local-scale studies across taxa and settings. Here we consider the effects of an... -
Assessment of plant species composition and natural regeneration in abandoned settlements in the lower montane forest of Kilimanjaro National Park, Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Imani Abinery Kikoti --- , Tanzania Cosmas Mligo --- , Tanzania Henry Joseph Ndangalasi --- , TanzaniaAnthropogenic modification of montane forests to other land uses has significant effects on native vegetation and the ecological functions of plant communities, such as in the forests of Mount Kilimanjaro. This study was carried out in Kilimanjaro National Park at... -
Assessments of range-wide distribution of six African storks and their relationships with protected areas
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jonah Gula --- , USA M Clay Green --- , USA Sarah Fritts --- , USA W Richard J Dean --- , South Africa KS Gopi Sundar --- , IndiaSpecies range maps provided by the IUCN and BirdLife International are recognised to sometimes mischaracterise distribution and have resulted in inaccurate status assessments. In this study we assessed distribution trends and relationships with protected area extent for six African storks,... -
Comparative Analysis of technical efficiency of wheat production in row planting and broadcasting methods: Empirical evidence from southern Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Assefa Ayele --- , Kassa Tarekegn --- ,A Cobb–Douglas stochastic production frontier was used to analyze the technical efficiency of wheat producers under row planting and broadcasting methods in Hadiya zone, southern Ethiopia. The estimated results of the Cobb–Douglas frontier model show that the mean technical efficiency... -
South Africa’s agro processing trade in value added, global value chains (GVCs) perspective
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ajebush A. Shafi --- , Republic of South Africa Mammo Muchie --- , Republic of South Africa Getachew T. Sedebo --- , Republic of South AfricaThe agro-processing sub-sector of the manufacturing industry has high recognition on the South African government’s development agenda. Yet, the contribution of the sector to the economy with respect to the foreign trade earning appears to be low in comparison to... -
Aluminium and manganese leaching and retention in two contrasting soils treated with aluminium-based sludge water in a column experiment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S Dube --- , South Africa P Muchaonyerwa --- , South Africa F Mapanda --- , Zimbabwe JC Hughes --- , South AfricaLiquid waste (sludge water (SW)) from treatment of drinking water contains impurities which pose disposal challenges. Irrigation with SW could be a solution for the Morton Jaffray Water Works. This study was conducted to determine the effects of SW dilution... -
Movement behaviour of catface rockcod Mycteroperca (Epinephelus) andersoni (Epinephelidae) off the eastern seaboard of southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- , South Africa R Daly --- , South Africa GL Jordaan --- , South Africa WN Dalton --- , South Africa ST Fennessy --- , South AfricaMovement behaviour of the endemic epinephelid Mycteroperca andersoni (formerly allocated to genus Epinephelus) along the east coast of southern Africa was investigated using both conventional dart tagging and passive acoustic telemetry. Results from both methods showed that this species is... -
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... -
Prevalence, population structure and burrow morphology of the kelp-boring amphipod Sunamphitoe roberta
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MJ Wilcox --- , South Africa J Landschoff --- , South Africa CL Griffiths --- , South AfricaThe recently described amphipod Sunamphitoe roberta lives only on the kelp Ecklonia maxima, where it excavates slit-like burrows along the distal margins of thicker primary fronds. Oval chambers along the bases of these slits may represent feeding areas. As burrowing... -
Use of remotely sensed derived metrics to assess wetland vegetation responses to climate variability-induced drought at the Soetendalsvlei wetland system in the Heuningnes Catchment, Western Cape province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NC Ndlala --- , South Africa T Dube --- , South AfricaWetland vegetation plays an important role in the environmental functioning of wetlands through the provision of ecosystem services, such as food and critical habitat for organisms that live in or near water resources. The ecosystem services provided by wetland vegetation... -
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... -
Evidence for overfishing of tigerfish Hydrocynus vittatus (Castelnau 1861) in the Kavango River, Namibia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FJ Jacobs --- , Namibia TF Naesje --- , Norway EM Ulvan --- , Norway CJ Hay --- , Namibia FH Khaebeb --- , Namibia OLF Weyl --- , South AfricaThe fishery for the African tigerfish Hydrocynus vittatus in northern Namibia makes a substantial contribution to surrounding food security and stimulates the local economy through subsistence and recreational fishing. However, local fishers suggest that catch rates of H. vittatus have... -
Disaggregation and assessment of estuarine pressures at the country-level to better inform management and resource protection – the South African experience
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L van Niekerk --- , South Africa S Taljaard --- , South Africa SJ Lamberth --- , South Africa JB Adams --- , South Africa SP Weerts --- , South Africa CF MacKay --- , South AfricaGlobally, the ability of estuaries to sustain functionality and productivity is deteriorating rapidly under ever-increasing anthropogenic pressures. We present a systematic approach to identify, characterise and rank global pressures affecting estuaries. Six main pressure categories are reviewed: freshwater flow modification;... -
Diet of a generalist mammalian mesocarnivore in an urban matrix
Item type: Journal Article • Journal: African Zoology • Authors: Jarryd P Streicher --- , South Africa Melanie B Streicher --- , South Africa Tharmalingam Ramesh --- , South Africa Colleen T Downs --- , South AfricaAnthropogenic habitat conversion through urban sprawl is driving mesocarnivores to modify their behaviour and ecology. Thorough knowledge of their feeding ecology is fundamental in understanding the pressures imposed on mesocarnivores by urbanisation. The diet of the water mongoose Atilax paludinosus... -
Factors that influence household food security in Hamburg and Melani, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Thulani Ningi --- , South Africa Amon Taruvinga --- , South Africa Leocadia Zhou --- , South Africa Saul Ngarava --- , South AfricaFood is one of the essential areas of service delivery required for a household’s wellbeing and development. Against this background, the literature suggests a high level of food insecurity among rural households in South Africa. Thus far, this study has... -
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,... -
The sustainable lifestyle level: How real salary increases affect adequate retirement provision
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Elze-Mari Roux --- , South Africa Johann de Villiers --- , South AfricaThis article studies the effect of real increases in salary on required contribution rates when saving for retirement to maintain a Sustainable Lifestyle Level (SLL). We consider two strategies. The first sets conventional contribution rates, recalculating whenever an increase occurs... -
Warming promotes growth of seedlings of a woody encroacher in grassland dominated by C4 species
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lusanda Ncisana --- , South Africa Ntuthuko R Mkhize --- , South Africa Peter F Scogings --- , South AfricaLittle is known of warming effects on growth and defence of woody seedlings that potentially invade grasslands. We predicted that elevated temperatures would increase growth and spine length of Vachellia sieberiana seedlings growing (1) with or without grass in 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... -
Screening herbicides and herbicide mixtures to identify alternative chemical controls for resistant plantago biotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vhuthu Ndou --- , South Africa Ethel E Phiri --- , South Africa Petrus J Pieterse --- , South AfricaHerbicide mixtures are beneficial since they delay the occurrence of resistance to herbicides, provided that the herbicides used are effective at controlling the target weed species. Recently, plantago (Plantago lanceolata L.) was found to show 23 and 10-fold-resistance to glyphosate... -
Determination of foliar nutrient sufficiency ranges in cultivated rooibos tea using the boundary-line approach
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Jacobus FN Smith --- , South Africa Ailsa G Hardie --- , South AfricaDespite the global importance of rooibos tea (Aspalathus linearis (Burm.f.) R.Dahlgren) as a health-promoting crop, foliar nutrient sufficiency ranges have not yet been determined for commercially cultivated rooibos. Determination of these ranges is critical for assessing plant nutrient status and... -
Nexus between perceptions of urban environmental planning and solid waste management practices in Debre Markos Town, Amhara Region, Northwest Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Genet Barklign --- University of Gondar, Ethiopia Kassahun Gashu --- University of Gondar, EthiopiaLack of integration between urban environmental planning and solid waste management is a challenge for cities in developing countries. The aim of the research was to analyze the nexus between local communities’ perceptions of urban environmental planning and solid waste... -
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... -
Nitrogen mineralisation and N2O emissions in pure and mixed-species plantations of Eucalyptus urograndis and Acacia mangium
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Felipe Martini Santos --- , Brazil Fabiano de Carvalho Balieiro --- , Brazil Danilo Henrique dos Santos Ataíde --- , Brazil Pedro Vaz da Rocha --- , Brazil Bruno JR Alves --- , Brazil Guilherme M Chaer --- , BrazilWe hypothesised that N inputs to the soil from residues of adult trees of Acacia mangium Willd. increase soil nitrate availability and consequently induce higher nitrous oxide (N2O) fluxes, irrespective of being in pure or mixed stands with Eucalyptus. A... -
Correlation of variations in species abundance of Atlantic forests regenerating on abandoned pastures with different environmental and spatial variables
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: João Paulo de Maçaneiro --- , Brazil Laio Zimermann Oliveira --- , Brazil Lauri Amândio Schorn --- , Brazil Franklin Galvão --- , Brazil Guilherme Salgado Grittz --- , Brazil André Luís de Gasper --- , BrazilThe conversion of native forests into pastures is still a common practice in Brazil. Abandoned pastures have great potential for natural regeneration and therefore could play an important role in meeting the enormous demand for forest restoration. Few studies, however,... -
Estimating the economic income and social contributions derived from the South African west coast rock lobster fishery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JM Eggers --- Rhodes University, South Africa KL Cochrane --- Rhodes University, South Africa WHH Sauer --- Rhodes University, South AfricaThe west coast rock lobster Jasus lalandii fishery is South Africa’s third-most-valuable fishery, although the stock is currently estimated at <2% of its pristine biomass. Recent ecologically necessary reductions in the total allowable catch (TAC) had negative economic impacts on... -
Metabarcoding of zooplankton confirms southwards dispersal of decapod crustacean species in the western Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Govender --- Oceanographic Research Institute (ORI), South Africa JC Groeneveld --- Oceanographic Research Institute (ORI), South Africa SP Singh --- Oceanographic Research Institute (ORI), South Africa S Willows-Munro --- University of KwaZulu-Natal, South AfricaMetabarcoding to determine marine zooplankton species composition is a fast-developing method, yet to be fully standardised. DNA barcode reference libraries that link species to barcode sequences remain incomplete, taxonomically imprecise, and biased towards well-studied regions. We used metabarcoding to determine... -
Policing the (post)colonial body: The Covid-19 lockdown in South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Amber Reed --- , United States of America Ziyanda Xaso --- , South AfricaIn March 2020, South Africa enacted one of the world’s most severe lockdowns to combat the SARS-CoV-2 pandemic. Whilst this action received international praise, its implementation by the armed security forces in many ways mirrored colonial and apartheid-era controls on... -
Challenges to the integration of the Platfontein San in South Africa between 1990 and 2003
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Eldar Salakhetdinov --- University of South Africa, South AfricaThis article is based on a narrative case study that explores the controversy in the history surrounding the Platfontein San. During the South African border war, San soldiers joined the South African Defence Force in their fight against African liberation... -
Using riparian plant species to locate the 1:2-year floodline on single channel rivers
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MK Reinecke --- , South Africa CA Brown --- , South Africa KJ Esler --- , South Africa JM King --- , South AfricaRiparian zones can be characterised botanically into two main areas, a wet bank and a dry bank. These areas have been linked to the duration of inundation by river flow, the boundary between the two being the 1:2 year floodline... -
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... -
An assessment of water and sediment quality of aquatic ecosystems within South Africa’s largest floodplain
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D van Rooyen --- , South Africa R Gerber --- , South Africa NJ Smit --- , South Africa V Wepener --- , South AfricaNdumo Game Reserve (NGR), a Ramsar site, situated in South Africa’s largest floodplain (Phongolo River floodplain) in northern KwaZulu-Natal, with important aquatic ecosystems: the Usuthu and Phongolo rivers and their associated floodplain lakes. While the Phongolo River is regulated, the... -
Effect of slope aspect on vegetation characteristics in mountain rangelands of Tajikistan: considerations for future ecological management and restoration
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mounir Louhaichi --- , Tunisia Rajabov Toshpulot --- , Uzbekistan Hloniphani Peter Moyo --- , Jordan Azaiez Ouled Belgacem --- , Kingdom of Saudi ArabiaTajikistan’s rangelands are mostly mountainous and consist of summer and winter pastures. Vegetation structure and composition in these diverse landscapes are generally influenced by environmental factors. The objective of this study was to assess the effects of aspect on vegetation... -
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... -
Changing use of species and hybrids in South African forest plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Andrew R Morris --- Institute for Commercial Forestry Research, South AfricaSouth Africa has 1.2 million hectares of plantations developed progressively through the 20th century. These occur from 23° to 34°S, from near sea level to 2 000 m above sea level and in both Mediterranean winter rainfall and summer subtropical... -
Patterns of fish distribution in tropical rock pools at Príncipe Island, Gulf of Guinea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Azevedo e Silva --- University of Lisbon, Portugal AJ Almeida --- University of Lisbon, Portugal M Cravo --- University of Lisbon, Portugal MP Pais --- University of Lisbon, Portugal Y Santos --- , São Tomé e Príncipe J Paula --- University of Lisbon, PortugalLittle is known about the ichthyofauna from intertidal rock pools of the west coast of Africa, especially in the Gulf of Guinea. Rock pools are characteristic habitats of the intertidal zone of structurally complex rocky shores, adding important niche space... -
Sludge as an initial nutrient driver for yield improvement in the poor soils of northern Namibia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Ehsan Ebrahimi --- University of Rostock, Germany Jana Zinkernagel --- Hochschule Geisenheim University, GermanyThe northern part of Namibia suffers from drought and low-quality soil. The soil needs a boost of nutrients, and the water must be used in a frugal manner. Thereby, the objective of this research was to investigate the effect of... -
Soil organic carbon stocks and properties are affected by plant cover types in an urban ecosystem in Colombia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Víctor Mondragón --- Universidad Nacional de, Colombia Sede Medellín Flavio Moreno Hurtado --- Universidad Nacional de, Colombia Sede Medellín Daniel Francisco Jaramillo Jaramillo --- Universidad Nacional de, Colombia Sede MedellínSoil organic carbon (SOC) is the main element in soil organic matter (SOM) and its storage or release into the atmosphere is sensitive to changes in land use. This study evaluated SOC storage and SOM quality in the Metropolitan Regional... -
L'ascenseur et l'escalier — la lutte contre le SIDA au Cameroun
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Jacques-Philippe Tsala Tsala --- Department of Psychology, University of Yaoundé I and Catholic University of Central Africa, CameroonHIV/AIDS infection has spread like wildfire in the countries of sub-saharan Africa. In order to fight that pandemic, Cameroon has organised itself by setting up, with the assistance of bilateral and multilateral partners, a national structure with the aim to... -
Effect of exposure to clinic-based health education interventions on behavioural intention to prevent mother-to-child transmission of HIV infection
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Jude Igumbor --- School of Health Sciences, University of Venda, South Africa Supa Pengpid --- National School of Public Health, University of Limpopo, South Africa Larry Obi --- University of Venda, South AfricaHIV and AIDS incidence among infants in South Africa is on the increase. The uptake of prevention of mother-to-child transmission (PMTCT) interventions is often said to be dependent on the beliefs and educational needs of those requiring PMTCT services. This... -
An assessment of government policy response to HIV/AIDS in Ghana
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Julius Fobil --- School of Public Health, University of Ghana, Ireneous Soyiri --- School of Public Health, University of Ghana,The HIV/AIDS epidemic in Africa has assumed a dimension raising heartbreaking anxiety among national governments and civil society groups. In Ghana for example, the pandemic is well-documented and has gone beyond a health problem, and now encompasses all socio-economic aspects... -
Perceived stigma among patients receiving antiretroviral treatment: A prospective randomised trial comparing an m-DOT strategy with standard-of- care in Kenya
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Susan Kaai --- Department of Health Studies and Gerontology, University of Waterloo, Canada Sandra Bullock --- Department of Health Studies and Gerontology, University of Waterloo, Canada Avina Sarna --- Population Council, Matthew Chersich --- Centre for Health Policy, University of the Witwatersrand, Stanley Luchters --- International Centre for Reproductive Health (ICRH), Department of Obstetrics and Gynecology, Ghent University, Belgium Scott Geibel --- Population Council, Paul Munyao --- ICAP, Kenya Kishorchandra Mandaliya --- , Kenya Marleen Temmerman --- Obstetrical Department, Ghent University Hospital, Naomi Rutenberg --- Population Council,HIV and AIDS remain highly stigmatised. Modified directly observed therapy (m-DOT) supports antiretroviral treatment (ART) adherence but little is known about its association with perceived stigma in resource-constrained settings. In 2003, 234 HIV-infected adults enrolled in a two-arm randomised trial... -
An assessment of sex work in Swaziland: barriers to and opportunities for HIV prevention among sex workers
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Shalote Chipamaunga --- Faculty of Health Sciences, Centre for Health Science Education, University of the Witwatersrand, Adamson S Muula --- University of Malawi College of Medicine, Ronald Mataya --- Loma Linda University School of Public Health, USAThe HIV situation in virtually all southern African countries is a generalised epidemic. Despite the fact that almost all adult age and social groups have high HIV prevalence estimates, sex workers are disproportionally affected, with prevalence estimates higher than the... -
HIV knowledge, disclosure and sexual risk among pregnant women and their partners in rural South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Molatelo Elisa Shikwane --- , South Africa Olga M. Villar-Loubet --- , USA Stephen M. Weiss --- , USA Karl Peltzer --- , South Africa Deborah L. Jones --- , USAPartner involvement has been deemed fundamental for the prevention of mother-to-child transmission (PMTCT) of HIV, although it remains difficult to achieve. This study aimed to explore the attitudes and behaviours of pregnant women and their partners who participated in a... -
Expanding the prevention armamentarium portfolio: A framework for promoting HIV-Conversant Communities within a complex, adaptive epidemiological landscape
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Christopher J. Burman --- , , South Africa Marota Aphane --- , , South Africa Oliver Mtapuri --- , , South Africa Peter Delobelle --- , , South AfricaThe article describes a design journey that culminated in an HIV-Conversant Community Framework that is now being piloted in the Limpopo Province of South Africa. The objective of the initiative is to reduce the aggregate community viral load by building... -
The convergence of HIV/AIDS and customary tenure on women's access to land in rural Malawi
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Naomi Tschirhart --- , , Canada Lucky Kabanga --- , , Malawi Sue Nichols --- , , CanadaThis paper examines the convergence of HIV/AIDS and the social processes through which women access customary land in rural Malawi. Data were collected from focus group discussions with women in patrilineal and matrilineal communities. Women's land tenure is primarily determined... -
A workplace intervention program and the increase in HIV knowledge, perceived accessibility and use of condoms among young factory workers in Thailand
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Aphichat Chamratrithirong --- , Thailand Kathleen Ford --- , USA Sureeporn Punpuing --- , Thailand Pramote Prasartkul --- , ThailandVulnerability to Human Immunodeficiency Virus (HIV) infection among factory workers is a global problem. This study investigated the effectiveness of an intervention to increase AIDS knowledge, perceived accessibility to condoms and condom use among young factory workers in Thailand. The... -
Relationship between socio-economic characteristics of older adults’ women and family planning use in Botswana
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Njoku Ola Ama --- Department of Statistics, University of Botswana, Botswana John O. Olaomi --- Department of Statistics, University of South Africa,Older adults (50 years and over) are still sexually active and therefore vulnerable to unplanned pregnancy, infection of STIs and HIV, yet there are no programmes in place to cater for their family planning needs. The objective of the study... -
Explicating factors that explain condom use intention among in-school adolescents in Botswana: a structural equation modelling approach
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Kolentino N. Mpeta --- North West University, South Africa Ntebogang D. Moroke --- North West University, South Africa Lesego Gabaitiri --- Botswana International University of Science and Technology, BotswanaKnowledge with respect to adolescents’ intentions to engage in protective sexual behaviours is still deficient in numerous countries around the world, particularly in Sub-Saharan Africa (SSA) where HIV prevalence is the highest. Increasing cross-sectional research suggests that the theory of... -
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... -
Reproduction in the Madagascar leaf‐nosed snake, langaha madagascariensis (Serpentes: Colubridae: Pseudoxyrhophiinae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: KennethL. Krysko --- University of Florida, USAAspects of reproduction including courtship behaviour, ovipositioning, egg characteristics, and hatchling descriptions are documented for the Madagascar leaf‐nosed snake (Langaha madagascariensis). Courtship behaviour is described from laboratory settings and takes place in vegetation above ground. Oviposition occurred at night time... -
Diet of sympatric Gaboon Vipers (Bitis gabonica) and Nose‐horned Vipers (Bitis nasicornis) in southern Nigeria
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Luca Luiselli --- Centre of Environmental Studies “Demetra” and F.I.Z.V., Italy GodfreyC. Akani --- Rivers State University of Science and Technology, NigeriaThe stomach content of 524 Gaboon Vipers, Bitis gabonica gabonica (53 subadults, 222 males and 249 females) and 392 Nose‐horned Vipers, Bitis nasicornis (48 subadults, 163 males and 161 females), from a number of forest‐plantation mosaic areas of southern Nigeria... -
Inter‐island variation and taxonomy of Seychelles Trachylepis
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Justin Gerlach --- University Museum of Zoology Cambridge, U.K.Skinks of the genus Trachylepis are geographically widespread and diverse. In the Seychelles islands two species are present, T. sechellensis and T. wrightii. All island populations of these two species were studied in 2000–2003 and the morphology of the populations... -
Generation glands and sexual size dimorphism in the Cape Crag Lizard, Pseudocordylus microlepidotus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: P. le FrasN. Mouton --- University of Stellenbosch, South Africa Carmen Gagiano --- University of Stellenbosch, South Africa Beate Sachse --- University of Stellenbosch, South AfricaThe Cape Crag Lizard, Pseudocordylus microlepidotus, is unique among cordylid lizards in that generation glands are not restricted to the femoral region, but also occur on the dorsum and in the inguinal region. We analysed 274 museum specimens of P... -
Feeding behaviour of the Madagascar leaf‐nosed snake, Langaha madagascariensis (Serpentes: Colubridae: Pseudoxyrhophiinae), with an alternative hypothesis for its bizarre head structure
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: KennethL. Krysko --- University of Florida, USAFeeding behaviour of the Madagascar leaf‐nosed snake (Langaha madagascariensis) is described and an alternative use for its unusual nasal appendage is hypothesized. Langaha madagascariensis employs a sit‐and‐wait foraging strategy and stalking prey is initiated once a snake is conscious of... -
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... -
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... -
Analysis of intraspecific colour variation in the fossorial Coastal Legless Lizard, Microacontias litoralis (Scincidae: Acontiinae)
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: PhomoloL. Mashinini --- Transvaal Museum, South Africa Neil.J. L. Heideman --- University of the Free State, South Africa P. le FrasN. Mouton --- Stellenbosch University, South AfricaAn analysis of intraspecific variation in the fossorial skink Microacontias litoralis revealed that orange‐coloured and melanistic individuals co‐occur at several localities. Body colour was found to be independent of sex and body size. Both orange‐coloured and melanistic in situ embryos... -
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... -
The impacts of past cultivation on the reptiles in a South African grassland
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Gavin P. R. Masterson --- University of the Witwatersrand, South Africa Bryan Maritz --- University of the Witwatersrand, South Africa Darian Mackay --- University of the Witwatersrand, South Africa GrahamJ. Alexander --- University of the Witwatersrand, South AfricaHabitat transfonnation is the primary anthropogenic threat to global biodiversity. Fragmentation of reptile populations following habitat transfonnation within a landscape can lead to the extirpation of species. We investigated the effects of land-use on the species richness and abundance of... -
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... -
A new gregarious species of Trachylepis (Reptilia: Sauria: Scincidae) from Lolui Island, Lake Victoria, Uganda, with a key to Ugandan Trachylepis
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Rungwe Kingdon --- Gallery Pangolin, UK Stephen Spawls --- , UKA new, distinctive gregarious species of Trachylepis is described from five specimens from Lolui Island, in Lake Victoria, Uganda, East Africa. Living in large groups on rock outcrops, it is distinguished from its congeners by differences in colour pattern and... -
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... -
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... -
Distribution and conservation status of the desert rain frog Breviceps macrops
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Alan Channing --- University of the Western Cape, South Africa Kirsty Wahlberg --- University of the Western Cape, South AfricaThe desert rain frog, Breviceps macrops, is found along the greater Namaqualand coast, an area of acute conservation concern. We reconstruct the distribution of this species from museum specimens to the north and quantitative surveys in the south. In addition,... -
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... -
A new species of Hemidactylus (Squamata: Gekkonidae) from Príncipe Island, Gulf of Guinea, West Africa with comments on the African-Atlantic clade of Hemidactylus geckos
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: ElizabethC. Miller --- University of California, USA AnnaB. Sellas --- California Academy of Sciences, USA RobertC. Drewes --- California Academy of Sciences, USAThe remote oceanic Gulf of Guinea islands of São Tomé and Príncipe are home to a highly endemic herpetofauna, which has become the focus of modern, on-going scientific analysis only during the past decade. Until now, the endemic Hemidactylus greeffi... -
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... -
Predation on the eggs of ground-nesting birds by Dasypeltis scabra (Linnaeus, 1758) in the moist highland grasslands of South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Michael F. Bates --- , , South Africa Ian T. Little --- , South AfricaWe provide evidence for predation by the Common Egg-eater (Dasypeltis scabra) on the eggs of three species of ground-nesting birds, namely African Pipit (Anthus cinnamomeus), Cape Longclaw (Macronyx capensis) and Common Quail (Coturnix coturnix). Although egg-eaters have been recorded as... -
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... -
Evaluation of the quality constructs of a tax management system based on DeLone and McLean IS success model
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Godwin Banafo Akrong --- School of Management and Economics (UESTC), University of Electronic Science and Technology, People’s Republic of China Yunfei Shao --- School of Management and Economics (UESTC), University of Electronic Science and Technology, People’s Republic of China Ebenezer Owusu --- University of Ghana, GhanaWe presented a novel method to analyze the impact tax management systems have on users (individual impact) in this study. The interrelationship among the three information system (IS) quality constructs is examined. The study is based on the evaluation undertaken... -
Performance of goats browsing on Vachellia karroo encroached communal lands and open grasslands in the Eastern Cape province, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: W Maguraushe --- University of Fort Hare, South Africa JF Mupangwa --- University of Namibia, Namibia S Washaya --- Great Zimbabwe University, Masvingo V Muchenje --- University of Fort Hare, South AfricaThe objective of this study was to evaluate the effects of season, rangeland type, and herd size on the performance of goat browsing. A total of eighty communal household goat herds from Mbashe and Nkonkobe municipalities were monitored for twelve... -
Implications of the breakdown in the indigenous knowledge system for rangeland management and policy: a case study from the Eastern Cape in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Andiswa Finca --- , South Africa Suzanne Linnane --- Dundalk Institute of Technology, Ireland Jill Slinger --- Delft University of Technology, The Netherlands David Getty --- Dundalk Institute of Technology, Ireland M Igshaan Samuels --- University of Western Cape, South AfricaCommunal rangelands in South Africa are generally perceived as overgrazed owing to complexities in their histories and collective utilisation which often leads to improper management. A suitable solution has not been found in land management policies because local people’s contexts... -
Kraals or bomas increase soil carbon and fertility across several biomes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mia Momberg --- University of Pretoria, South Africa Anna Jean Haw --- , Kenya Perushan Rajah --- , South Africa Jacques van Rooyen --- , Kenya Heidi-Jayne Hawkins --- , South AfricaKnowledge about how pastoralism and kraaling may contribute to desired global objectives, such as soil fertility, is in danger of being lost. We tested whether short duration kraaling increases soil fertility across various biomes and countries via a meta-analysis (random... -
A balanced perspective on the contribution of extensive ruminant production to greenhouse gas emissions in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Michiel M Scholtz --- , South Africa Frans J Jordaan --- , South Africa N Thuli Chabalala --- , South Africa Georgette M Pyoos --- , South Africa M Joel Mamabolo --- , South Africa Frederick WC Neser --- University of the Free State, South AfricaThere is a general perception that ruminants produce large quantities of greenhouse gases (GHG) which contribute to global warming. Ruminant production is also known as the world’s largest user of land, and southern Africa is no exception. Recent estimates indicate... -
Expansion of the Grassland Biome in the eastern Karoo corresponds with changes in rainfall and livestock numbers
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G Arena --- University of Cape Town, South Africa MT Hoffman --- University of Cape Town, South Africa H van der Merwe --- University of Cape Town, South Africa TG O’Connor --- , South AfricaThe persistent spread of shrublands is a global phenomenon observed across semiarid grassland-shrubland boundaries. Observations in South Africa, however, have detected a contrasting trend of increasing grass cover across the transition between the Nama-Karoo and Grassland Biomes over the last... -
Socio-psychological factors influencing farmers’ willingness to continue participating in collaborative activities of community-based innovation platforms in eastern Uganda
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Rebecca Mukebezi --- Makerere University, Uganda Bernard Bonton Obaa --- Makerere University, Uganda Florence Birungi Kyazze --- Makerere University, Uganda Settumba B. Mukasa --- Makerere University, Uganda Irene Bulenzibuto Tamubula --- Kyambogo University, UgandaThis study employed an extended theory of planned behaviour to assess the socio-psychological factors influencing farmers’ willingness to continue participating (WTCP) in collaborative activities of community-based innovation platforms (CB-IPs). Using a structured questionnaire, data were obtained from a random sample... -
Validation of growth zone formation in Oreochromis mossambicus otoliths collected from an irrigation pond in the Sundays River Valley, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mofu --- Rhodes University, South Africa T Dalu --- University of Mpumalanga, South Africa RJ Wasserman --- South African Institute for Aquatic Biodiversity, South Africa DJ Woodford --- University of the Witwatersrand, South Africa OLF Weyl --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaIn fisheries science, life-history trait information is widely used to estimate fish population recruitment, growth, and mortality. The aging and growth of Oreochromis mossambicus from the Sundays River Valley irrigation pond in the Eastern Cape province of South Africa were... -
Roles and responsibilities of expert clients in adolescent HIV service delivery in Eswatini: a conventional content analysis
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Charisse V Ahmed --- University of Pennsylvania School of Nursing, USA Guy Weissinger --- University of Pennsylvania School of Nursing, USA Anne M Teitelman --- University of Pennsylvania School of Nursing, USA Ndumiso Sabelo Dlamini --- University Research Co., LLC, Eswatini Nontsikelelo Patience Dlamini --- University Research Co., LLC, Eswatini Thuthukile Cebsile Dlamini --- University Research Co., LLC, Eswatini Angel Nkambule --- University Research Co., LLC, Eswatini Siphesihle Nkambule --- University Research Co., LLC, Eswatini Bridgette M Rice --- Villanova University, USA Marianne Calnan --- University Research Co., LLC, EswatiniWe aimed to elucidate the specific roles and responsibilities of expert clients in service delivery among adolescents living with HIV in Eswatini, and to provide recommendations for enhancing adolescent service provision among expert clients and similar lay health workers throughout... -
Generation Z’s perspective on restaurant service quality
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Maike Nuyken --- Wittenborg University of Applied Sciences, The Netherlands Doron Zilbershtein --- Wittenborg University of Applied Sciences, The Netherlands Abdul Rauf --- Wittenborg University of Applied Sciences, The NetherlandsWhen it comes to dining, Generation Z (Gen Z) consumers bring their own set of expectations that challenge conventional perspectives of restaurant service quality. The purpose of this research was to explore the relevance of DINESERV to the evaluation of... -
Living in a desert: examining scorpion beta diversity in Egyptian drylands from a macroecological perspective
Item type: Journal Article • Journal: African Zoology • Authors: André FA Lira --- Universidade Federal de Campina Grande, Brazil Stênio ÍA Foerster --- Institute of Ecology and Earth Sciences, University of Tartu, Estonia Ahmed Badry --- Al-Azhar University, EgyptDrylands correspond to ca. 40% of the world’s land surface. Because of their ecological importance, these areas are regularly considered for agricultural purposes. Scorpion assemblages often exhibit higher levels of species diversity in dry habitats and are beneficial indicators in... -
Wind- and eddy-driven upwelling over submarine canyons inshore of the northern Agulhas Current
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Rautenbach --- Nelson Mandela University, South Africa J Hermes --- , South Africa I Halo --- , South Africa T Morris --- , South Africa J Veitch --- , South AfricaThe iSimangaliso Wetland Park, located along the coastline of northern KwaZulu-Natal, hosts South Africa’s only subtropical coral reef system. Episodic upwelling events are observed inshore and at the heads of Diepgat, Leadsman and Leven canyons within the iSimangaliso Wetland Park... -
The effect of crop rotation and tillage practice on residue decomposition and wheat performance in the Western Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johannes Stephanus Theron --- Stellenbosch University, South Africa Gerhardus Johannes van Coller --- , South Africa Lindy Joy Rose --- Stellenbosch University, South Africa Johan Labuschagne --- Stellenbosch University, South Africa Pieter Andreas Swanepoel --- Stellenbosch University, South AfricaConservation agriculture relies on residue retention, crop rotation and reduced tillage. Crop rotation determines residue type, while tillage affects residue load and distribution. Although crop residue retention is often beneficial, residues can create challenges, including obstruction of planters during establishment... -
An allele-specific PCR assay for detection of mutations that confer benzimidazole resistance and zoxamide sensitivity in Phyllosticta citricarpa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Beatrix Coetzee --- Stellenbosch University, South Africa Elma Carstens --- Citrus Research International (Pty) Ltd, South Africa Gerhardus C Schutte --- Avima (Pty) Ltd, South Africa Elaine Basson --- Citrus Research International (Pty) Ltd, South Africa Mia J Groeneveld --- Stellenbosch University, South Africa Tankiso Mpholo --- Land Reform and Rural Development, South Africa Providence Moyo --- Citrus Research International (Pty) Ltd, South Africa Jessica C Winn --- Stellenbosch University, South Africa Paul H Fourie --- Citrus Research International (Pty) Ltd, South Africa Aletta E Bester van der Merwe --- Stellenbosch University, South AfricaPhyllosticta citricarpa is the causative agent of citrus black spot (CBS), a cosmetic fungal disease that has been reported in most of the citrus-growing regions of the world. The occurrence of CBS in orchards is predominantly controlled by the application... -
Clonal microplant production of Corymbia maculata: effect of chemical sterilisation, plant growth regulator, gas exchange, activated charcoal and lighting
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Letícia Vaz Molinari --- Federal University of Lavras, Brazil Denys Matheus Santana Costa Souza --- Federal University of Lavras, Brazil Maria Lopes Martins Avelar --- Federal University of Lavras, Brazil Sérgio Bruno Fernandes --- Federal University of Lavras, Brazil Douglas Santos Gonçalves --- Federal University of Lavras, Brazil Dulcinéia de Carvalho --- Federal University of Lavras, Brazil Laura Ribeiro Atala --- Federal University of Lavras, Brazil Gilvano Ebling Brondani --- Federal University of Lavras, BrazilCorymbia maculata stands out for its resistance to biotic and abiotic stress and for its high-density wood, which is ideal for sawmills, sleepers, posts, firewood and charcoal. In vitro culture techniques can be used for large-scale clonal microplant production, given... -
Ekeland, Takahashi and Caristi principles in preordered quasi-metric spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: S. Cobzaş --- Babeş-Bolyai University, RomaniaWe prove versions of Ekeland, Takahashi and Caristi principles in pre-ordered quasi-metric spaces, the equivalence between these principles, as well as their equivalence to some completeness results for the underlying quasi-metric space. These extend the results proved in S. Cobzaş,... -
Reproduction of the Western Marsh Harrier Circus aeruginosus at the El Maleh Dam reservoir in north-western Morocco
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abdeslam Rihane --- , Morocco Abdelmottalib Nahli --- Hassan II Université Casablanca, Morocco Rhimou El Hamoumi --- Hassan II Université Casablanca, Morocco Mohamed Chlaida --- Hassan II Université Casablanca, MoroccoThe reproduction of the Western Marsh Harrier Circus aeruginosus in submerged and dried up thickets of French tamarisk Tamarix gallica at El Maleh Dam reservoir, Benslimane Province, Morocco, was studied through monitoring nests in three successive years (2017–2019). Systematic field... -
Non-blow-up and blow-up results to heat equations with logarithmic nonlinearity on stratified groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ardak Kashkynbayev --- Nazarbayev University, Kazakhstan Aidyn Kassymov --- Ghent University, Belgium Durvudkhan Suragan --- Nazarbayev University, KazakhstanIn this paper, we obtain a finite-time non-blow-up result for the sub-Laplacian heat equations with logarithmic nonlinearity on stratified groups. In our proof, the logarithmic Sobolev-Folland-Stein inequality plays a key role. We also establish a blow-up result at infinite time... -
Nutritional support practices at an intensive care unit in Johannesburg, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Abdullah E Laher --- University of the Witwatersrand, South Africa Jared McDowall --- University of the Witwatersrand, South Africa Mikayla van Welie --- University of the Witwatersrand, South Africa Domenic M Malinga --- University of the Witwatersrand, South Africa Alistair J Craythorne --- University of the Witwatersrand, South Africa Brandon J van Aardt --- University of the Witwatersrand, South Africa Tasneem Dalvie --- University of the Witwatersrand, South Africa Guy A Richards --- University of the Witwatersrand, South Africa -
Changes in plant vegetation structure and diversity with distance from herder shelters in the Middle Atlas Mountains
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: A El Aich --- Institut Agronomique et Vétérinaire Hassan II, Morocco S Ghassan --- Institut Agronomique et Vétérinaire Hassan II, Morocco CL Alados --- Instituto Pirenaico de Ecología (CSIC), Spain S El Aayadi --- Institut Agronomique et Vétérinaire Hassan II, Morocco L Baamal --- Institut Agronomique et Vétérinaire Hassan II, MoroccoLivestock grazing intensity gradients associated with sheep holder shelters influenced the longevity of rangelands vegetation. This study aimed to examine the effects of livestock grazing pressure on vegetation structure and diversity with distance from herder shelters. Six shelters were sampled... -
Drought as a driver of vegetation change in Succulent Karoo rangelands, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SJ Milton --- , South Africa H Petersen --- , South Africa G Nampa --- , South Africa H van der Merwe --- , South Africa JR Henschel --- , South AfricaWe document changes in rangeland during a prolonged drought in the arid Karoo. Rangeland in this arid region is species-rich and dominated by a mixture of long-lived succulent and non-succulent shrubs. Ranching has led to the domination of vegetation by... -
Biological and life-history parameters for Labeo rosae Steindachner, 1894 and Oreochromis mossambicus (Peters, 1852) from Flag Boshielo Dam, Olifants River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HA Hlungwani --- University of Limpopo, South Africa SM Marr --- University of Limpopo, South Africa OLF Weyl --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa JR Sara --- University of Limpopo, South AfricaInland fisheries contribute towards food security for rural communities living close to large aquatic systems. However, sustainable inland fisheries rely on accurate biological information for the target species at the proposed fishery location. In this study, the biological information for... -
The road towards effective governance and management of marine protected areas in South Africa: evolving policies, paradigms and processes
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Kirkman --- , South Africa P Kowalski --- , South Africa BQ Mann --- Oceanographic Research Institute (ORI), South Africa GM Branch --- University of Cape Town, South Africa MG van der Bank --- South African National Biodiversity Institute (SANBI), South Africa KJ Sink --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa P Fielding --- , South Africa JB Mann-Lang --- Oceanographic Research Institute (ORI), South Africa MC Pfaff --- University of Cape Town, South Africa D Kotsedi --- , South Africa R Adams --- , South Africa S Dlulisa --- , South Africa SL Petersen --- , MadagascarThe efficacy of marine protected areas (MPAs) depends on their governance and management. We review their history in South Africa and recognise four periods. Period 1 (1964–1994) provided initial protection but was based on exclusionary, preservationist policies, was ad hoc... -
Effect of an educational intervention based on the Theory of Planned Behaviour in type 2 diabetic patients at a foot and eye care practice
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: B Pezeshki --- School of Medicine, Fasa University of Medical Sciences, Iran S Orangi --- School of Health, Fasa University of Medical Sciences, Iran SM Kashfi --- School of Health, Shiraz University of Medical Sciences, Iran P Afzali Harsini --- School of Health, Kermanshah University of Medical Sciences, Iran F Mohammadkhah --- Ramsar School of Nursing, Babol University of Medical Sciences, Iran A Khani Jeihooni --- School of Health, Shiraz University of Medical Sciences, Iran -
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... -
Liberate or obliterate: Women’s leadership in academia
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Mariette Coetzee --- University of South Africa, Maryam Moosa --- University of South Africa,Women form a critical component of the workforce of South Africa, yet the retention of women in leadership positions is problematic. This study examined the relationship between leadership opportunities and the retention of women at an open-distance education institution. A... -
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... -
Nutritional quality of Calobota sericea fodders harvested at different phenological stages – opportunities for inclusion in fodder flow programs for extensive livestock farmers
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ethan A Britz --- , South Africa Lilburne F Cyster --- University of the Western Cape, South Africa Clement F Cupido --- , South Africa M Igshaan Samuels --- , South Africa Thamsanqa DE Mpanza --- , South Africa Francuois L Müller --- , South AfricaCalobota sericea (Thunb.) Boatwr. & B.-E.van Wyk (Fabaceae) is a native legume from the semi-arid rangelands of South Africa. The species has been prioritised as a forage for water-limited agro-ecological areas. No information regarding the nutritional quality of C. sericea... -
Do native grasses emerge and establish in areas rehabilitated using vetiver grass?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lindokuhle X Dlamini --- University of KwaZulu-Natal, South Africa Michelle J Tedder --- University of KwaZulu-Natal, South Africa Kevin P Kirkman --- University of KwaZulu-Natal, South AfricaSpecies-rich grasslands provide important ecosystem services, and in South Africa, approximately 40% of these grasslands are degraded. Vetiver grass (from India) is often used during rehabilitation efforts to restore soil function without a thorough understanding of the potential negative ecological... -
Restricted inversion sequences and Schröder paths
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: David Callan --- University of Wisconsin-Madison, USA Toufik Mansour --- University of Haifa, IsraelIn this paper, we find an explicit formula for the number of inversion sequences of length n that avoid each of the pattern sets {021, 010}, {021, 011}, {021, 100, 101}, {021, 000, 101}, and {101, 102, 201}. This is... -
Effects of Acacia melanoxylon, an alien tree species to South Africa, on Afrotemperate forest tree sapling composition
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tineke Kraaij --- Nelson Mandela University, South Africa Johan A Baard --- , South Africa B Adriaan Grobler --- Nelson Mandela University, South Africa Bayleigh Miles --- Nelson Mandela University, South AfricaThe alien tree Acacia melanoxylon (R.Br.) occurs extensively in the Southern Cape Afrotemperate Forest (South Africa). Concerns exist about its potential negative effects on indigenous tree sapling communities, ultimately with implications for forest composition and structure. We investigated whether Acacia... -
A tree-level analysis of baboon damage in commercial forest stands using deep learning techniques
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Regardt Ferreira --- Nelson Mandela University, South Africa Kabir Peerbhay --- , South Africa Josua Louw --- Nelson Mandela University, South Africa Ilaria Germishuizen --- Institute for Commercial Forestry Research, South Africa Andrew Morris --- Institute for Commercial Forestry Research, South Africa Romano Lottering --- University of KwaZulu-Natal, South AfricaCommercial forest plantations in South Africa are homogeneous monocultures of highly bred exotic species grown to deliver timber products of the best potential quality. As such, these stands are susceptible to adverse effects of biotic and abiotic factors, and therefore... -
Preliminary investigation into deducing breeding success of African Penguins Spheniscus demersus from automated transponder reader data to reduce disturbance
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mpumalanga Mnyekemfu --- University of the Western Cape, South Africa Peter J Barham --- University of the Western Cape, South Africa Barbara Barham --- , United Kingdom Lauren Waller --- University of the Western Cape, South Africa Katrin Ludynia --- University of the Western Cape, South Africa Gavin W Maneveldt --- University of the Western Cape, South AfricaThe Endangered African Penguin Spheniscus demersus is in serious decline, with the total population falling at a rate of ∼5% per annum. The need to carry out regular monitoring to collect demographic and phenological data to assist in the planning... -
Status and density of the threatened Kori Bustard Ardeotis kori in a woodland savanna
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kathan Bandyopadhyay --- University of Wyoming, United States Bogdan Cristescu --- , Namibia Jeffrey L Beck --- University of Wyoming, United States John L Koprowski --- University of Wyoming, United States Laurie Marker --- , NamibiaMany grassland habitats have disappeared or undergone substantial change worldwide and many obligatory grassland animal species have populations that are at risk of extinction. The Kori Bustard Ardeotis kori is the largest flying bird native to Africa and an open... -
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... -
Pay satisfaction and work–life balance among Nigerian bank employees: The roles of psychological empowerment and gender
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Gabriel C. Kanu --- University of Nigeria, Nigeria Ijeoma C. Odinko --- University of Nigeria, Nigeria Ikechukwu V. N. Ujoatuonu --- University of Nigeria, NigeriaThis study examined the roles of psychological empowerment and gender in the relationship between pay satisfaction and work–life balance among bank employees. In total, 393 Nigerian bank employees participated in the study (female (49.36%; mean age = 32.07, SD =... -
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... -
Low hypoxia tolerance in larvae of the sardine Sardinops sagax and anchovy Engraulis encrasicolus may limit their stock recovery in the northern Benguela upwelling system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Kunzmann --- Leibniz Centre for Tropical Marine Research (ZMT), Germany RM Imam --- Leibniz Centre for Tropical Marine Research (ZMT), Germany SJ Geist --- Leibniz Centre for Tropical Marine Research (ZMT), GermanyPhysiological traits of five key fish species (Cape hake Merluccius spp., pelagic goby Sufflogobius bibarbatus, Cape horse mackerel Trachurus capensis, European anchovy Engraulis encrasicolus and sardine Sardinops sagax) from the northern Benguela upwelling system (NBUS) were compared during their larval... -
A new anuran genus from the fossil sites of Langebaanweg and Cooper’s Cave, South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Thalassa Matthews --- Iziko Museums of South Africa, South Africa Christine Steininger --- University of the Witwatersrand, South AfricaEnigmatic frog ilia were recovered from two geographically and temporally disparate fossil sites in South Africa, namely the Early Pliocene (5.1 Ma) fossil site of Langebaanweg (south-western Cape), and Cooper’s Cave D (Northern province), which dates to around 1.38 Ma... -
The effects of habitat loss and fragmentation on the relative abundance and conservation of Ludwig’s Bustard Neotis ludwigii in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Steven W Evans --- North-West University, South AfricaLudwig’s Bustard Neotis ludwigii is near-endemic to the semi-arid shrublands of southwestern southern Africa and is listed as Endangered. The primary threat to this species is collisions with overhead powerlines; however, loss and fragmentation of its habitat may contribute to... -
Diversity and abundance of avifauna in the Suba Forest area, central Ethiopia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Gemechis B Mosisa --- Haramaya University, Ethiopia Nega Tassie --- Bahir Dar University, Ethiopia Sintayehu W Dejene --- Haramaya University, EthiopiaBirds are one of the best-described taxa, but detailed knowledge about most bird species in Ethiopia remains rare, which hinders the development and evaluation of conservation strategies in the region. In this study, we estimated bird species diversity and abundance... -
Perioperative nutritional management of a Whipple’s patient
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Safiyah Hasson --- Groote Schuur Hospital, South AfricaPancreatic cancers comprise one of the most difficult cancers to diagnose and one of the leading causes of cancer-related deaths in the world.1,2 A 70-year-old male presenting with a head of pancreas malignant mass was referred for nutritional optimisation as... -
If COVID-19 doesn’t kill you, uber eats will: hospitality entrepreneurs’ views on online food aggregators
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Andy Erickson --- Auckland University of Technology, New ZealandEven before COVID-19 changed the world, hospitality operators were struggling to understand how to cope with the short-term benefits but potentially long-term damage to their business model of collaborating with food aggregators. The ease of accessing a well-managed customer interface... -
Soil nutrient deficiency assessment under soybean cropping systems using the DRIS system in northern and central Benin
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: --- Integrated Soil and Crop Management Research Unit, Benin --- Agricultural Research Centre (CRA) of Agonkanmey, Benin --- Polytechnic School of Abomey-Calavi, Benin --- Agricultural Research Centre (CRA) of Agonkanmey, Benin --- University of Abomey-Calavi, Benin --- Integrated Soil and Crop Management Research Unit, Benin --- Integrated Soil and Crop Management Research Unit, BeninSoybean is one of the promising crops in the Benin agro-industrial sector, but its production is carried out at the expense of the inherent soil fertility. The present study aims to apply the DRIS (Diagnosis and Recommendation Integrated System) for... -
Effects of land use and site on organic carbon fractions in some humic soil profiles of 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 Africa --- School of Agricultural, South AfricaSoil organic matter (SOM) and its different carbon (C) fractions play a vital role in storing C and are a source of plant nutrients in natural and managed ecosystems. This study was conducted at six sites in KwaZulu-Natal Province to... -
Lepidoptera as a tool for the assessment of human disturbance impacting ecological and taxonomic diversity in the Choke Mountains, Ethiopia
Item type: Journal Article • Journal: African Zoology • Authors: --- Ethiopian Biodiversity Institute, Ethiopia --- University of Brescia, Italy --- University of Brescia, Italy --- University of Molise, ItalyIn tropical countries, frequent anthropogenic disturbances are primary drivers of the reduction in community diversity and local extinction of many insect taxa, including Lepidoptera. We assessed the impact of anthropogenic disturbances on lepidopteran assemblages across five different land use types... -
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... -
Grazing capacity change on a small Mediterranean-type South African offshore island following the control of invasive alien European rabbits (Oryctolagus cuniculus)
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: --- University of KwaZulu-Natal, South Africa --- University of KwaZulu-Natal, South Africa --- Stellenbosch University, South AfricaInvasive alien species (IAS) are one of the most important factors driving extinction rates worldwide. Among the IAS, the impacts of introduced mammals on native biodiversity are most severe, with the European rabbit (Oryctolagus cuniculus) being the most problematic. Globally,... -
Quantifying the effect of chemical bush control of
Senegalia mellifera on vegetation production in the Eastern Kalahari Bushveld, South AfricaItem type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: --- , South Africa --- , South Africa --- North-West University, South AfricaBush encroachment is the invasion of whole landscapes by indigenous and alien woody species. An imbalance in the ratio of grasses to bushes is a consequence of bush encroachment due to competition for moisture, nutrients and sunlight. This imbalance results... -
Influence of groups of points on estimates of the parameters of moult
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Les G Underhill --- University of Cape Town, South Africa Tanya Scott --- University of Cape Town, South AfricaThe Underhill–Zucchini model of avian moult is a statistical simplification for the analysis of primary moult, a complex biological system in birds. As with all such models, conclusions can be biased if a subset of the data used to fit... -
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... -
Secondary vegetation provides a reservoir of non-timber forest products and agroforestry service options for forestry plantation systems, Maputaland, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: AP Starke --- University of Pretoria, South Africa CJ Geldenhuys --- University of Pretoria, South Africa TG O’Connor --- University of the Witwatersrand, South Africa CS Everson --- University of KwaZulu-Natal, South AfricaTree species providing non-timber forest products (NTFPs) have the potential to enhance the socio-economic value of forestry plantation systems and mitigate biodiversity loss associated with production landscapes in Southern Africa. This can be accomplished by integrating NTFP agroforestry systems with... -
Woody biomass increases across three contrasting land uses in Hurungwe, mid-Zambezi valley, Zimbabwe
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tatenda Gotore --- , Zimbabwe Sam Bowers --- University of Edinburgh, United Kingdom Hilton GT Ndagurwa --- National University of Science and Technology, Zimbabwe Shakkie Kativu --- University of Zimbabwe, Zimbabwe Anderson Muchawona --- , Zimbabwe Pomerayi Mutete --- , Zimbabwe Mduduzi Tembani --- , Zimbabwe Ruramai Murepa --- , Zimbabwe Admore Mureva --- Bindura University of Science Education, Zimbabwe Casey Ryan --- University of the Witwatersrand, South Africa Denis Gautier --- Université Montpellier, France Laurent Gazull --- Université Montpellier, FranceGlobally, Miombo woodlands store important quantities of carbon, with tree cover and carbon stocks strongly determined by human use. We assessed woodland cover and aboveground carbon (AGC) stocks of miombo along a utilisation gradient on three different land use types,... -
Process innovation in low-tech industries in India: An empirical exploration
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chidambaran G. Iyer --- Centre for Development Studies, IndiaTill now, studies have determined the existence of process innovation using survey data; however, in this paper, we use secondary data to empirically establish its presence in low-tech industries. Our empirical approach consists of data envelopement analysis in the first... -
Digital soil mapping enables informed decision-making to conserve soils within protected areas
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: George M van Zijl --- North-West University, South Africa Johan van Tol --- University of the Free State, South AfricaProtected areas are regarded as pristine land, but often they require rehabilitation and effective management to prevent increased land degradation. Soil management should be based on soil maps, which are difficult to create in protected areas due to their large... -
Transpiration efficiency of lucerne under unlimited soil water conditions during the first growing season
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: CM Tfwala --- University of the Free State, South Africa G Mengistu --- University of the Free State, South Africa IB Ukoh Haka --- University of the Free State, South Africa LD van Rensburg --- University of the Free State, South Africa CC du Preez --- University of the Free State, South AfricaLucerne production is regarded as requiring high water inputs, making it necessary to understand its transpiration efficiency, especially in countries with water scarcity such as South Africa. The resurgent opportunities in the local lucerne markets prompted the publication of this... -
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... -
Drought release and post-drought changes in herbaceous composition and diversity in two land uses subjected to selective bush control in a semi-arid Kalahari savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: N van Staden --- North-West University, South Africa A Marquart --- North-West University, South Africa K Kellner --- North-West University, South AfricaLand degradation due to bush encroachment and drought threatens the well-being of land users and forage production in the semi-arid savannas of southern Africa. This study aimed to analyse how herbaceous vegetation in the Kalahari savanna can recover from drought,... -
Testing the thermal melanism hypothesis for Cape Cobras (Naja nivea) using community science photographic data
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jody M Barends --- University of Johannesburg, South Africa Kim J Scholtz --- University of the Western Cape, South AfricaAnimal colour is a highly adaptive phenotypic trait that can respond to several selection pressures, including those facilitated by variations in climate. The thermal melanism hypothesis predicts that for ectotherms, selection for darker phenotypes should be highest in cooler areas... -
Burrow site selection in the Sungazer (Smaug giganteus): a threatened South African endemic lizard
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Wade K Stanton-Jones --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa Daniel JD Natusch --- Macquarie University, Australia Graham J Alexander --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South AfricaElucidating factors that drive microhabitat selection in a species is important for informing the conservation management of the species. For species that use microhabitats as long-term refuge sites, selection pressures are likely to be strong because the microhabitat must fulfil... -
Subgroups of products of semitopological groups with a strong development
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Iván Sánchez --- Universidad Autónoma Metropolitana,Using the notion of ωs-balanced semitopological group and some cardinal invariants, Kumar and Tyagi [7] characterize when a regular (T 1, Hausdorff) semitopological group admits a homeomorphic embedding as a subgroup into a product of regular (T 1, Hausdorff) semitopological... -
On slant Riemannian submersions from conformal Sasakian manifolds
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mehraj Ahmad Lone --- National Institute of Technology Srinagar, India Towseef Ali Wani --- National Institute of Technology Srinagar, IndiaIn this paper, we study slant Riemannian submersions from conformal Sasakian manifolds onto Riemannian manifolds. We investigate the geometry of foliations associated with the submersion and give sufficient conditions for the submersion to be harmonic. -
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... -
Susceptibility of dwarf chameleons to climate and land use change: a vulnerability framework for conservation planning
Item type: Journal Article • Journal: African Zoology • Authors: Tyron K Clark --- University of the Witwatersrand, South Africa Graham J Alexander --- University of the Witwatersrand, South Africa Krystal A Tolley --- South African National Biodiversity Institute, South AfricaClimate and land use changes are eroding biodiversity globally, and reptiles are highlighted as being particularly susceptible. In South Africa, global changes threaten the persistence of an assemblage of dwarf chameleons (Bradypodion) located in a biodiversity hotspot. We used ecological... -
English instruction experiences of native South African speech-language and/or hearing (SLH) undergraduate students: An exploratory study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Katijah Khoza-Shangase --- University of the Witwatersrand, South Africa Margo Kalenga --- University of the Witwatersrand, South AfricaThis study explored the experience of English as an instruction medium by South African Speech-Language and Hearing (SLH) students whose first language is not English ( African language speakers). A purposive sample of 24 female students for whom English was... -
Zooplankton composition following an artificial mouth breaching event in Lake St Lucia, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NK Carrasco --- University of KwaZulu-Natal, South Africa S Ramdass --- University of KwaZulu-Natal, South AfricaLake St Lucia is one of the most important estuarine systems in South Africa, but the long history of anthropogenic intervention has threatened its integrity. With the exception of sporadic overtopping events and periodic marine connectivity via the uMfolozi River,... -
Experiences of a fine dining event held inside a working prison
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Alison McIntosh --- Auckland University of Technology, New Zealand Tracy Harkison --- Auckland University of Technology, New ZealandFine dining experiences offered inside working prisons are one type of hospitality initiative attempting to support prisoner rehabilitation and offer a memorable dining experience for the paying public. Previous hospitality research has not explored how fine dining delivered in a... -
The role of autonomy and competence in retaining Dutch hotel staff post-COVID-19
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Sofiia Norenko --- Wittenborg University of Applied Sciences, The Netherlands Emmah Muchoki --- Wittenborg University of Applied Sciences, The Netherlands Vanessa de Oliveira Menezes --- Wittenborg University of Applied Sciences, The Netherlands René Rijnders --- Wittenborg University of Applied Sciences, The NetherlandsThis article explores potential changes in employee motivation for retention in the Dutch hotel industry after the COVID-19 pandemic, applying the self-determination theory to examine autonomy and competence. An online survey was designed and applied to 298 Dutch hotel staff... -
Identification of main variables in forest management for recovery of endemic species habitat in burned areas of southern Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Roberto Moreno --- Instituto de Investigación Sistema Tierra (IISTA), Universidad de Córdoba, España Ricardo Zamora --- Universidad de Córdoba, España Norman Moreno-García --- Universidad Mayor, Chile Carlos Esse --- Instituto Iberoamericano de Desarrollo Sostenible (IIDS), Universidad Autónoma de Chile, Chile Carmen Galán --- Instituto de Investigación Sistema Tierra (IISTA), Universidad de Córdoba, España Juan Ramón Molina --- Universidad de Córdoba, EspañaWildfires are among the most serious disturbances that affect forest biodiversity, damaging both flora and fauna. In some burned areas, vegetation recovery is a long and complex process that requires the support of restorative actions. This study evaluated changes in... -
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... -
The recent fire regimes of Luengue-Luiana and Mavinga national parks, Angola
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Willem A Nieman --- , United StatesThe adjoining Luengue-Luiana and Mavinga national parks in southeastern Angola are two of the largest though least actively managed protected areas in Africa. The parks are home to a diversity of wildlife and are managed as a single unit. The... -
Grass dynamics along a woody-plant density reduction gradient in a South African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Piet Monegi --- Animal Production–Agricultural Research Council, South Africa Ntuthuko R. Mkhize --- Animal Production–Agricultural Research Council, South Africa Julius T. Tjelele --- Animal Production–Agricultural Research Council, South Africa David Ward --- Kent State University, United States Zivanai Tsvuura --- University of KwaZulu-Natal, South AfricaWoody plant encroachment threatens ecosystem services and functioning, thereby reducing herbaceous plant population persistence and community stability. We assessed the impact of woody removal intensity (WRI) on the grass ground cover, grass composition, diversity and richness, and rangeland condition in... -
Prevalence of osteoporosis and factors associated with bone density in HIV-positive kidney transplant candidates and recipients from an HIV-positive donor
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: CJ Martin --- University of KwaZulu-Natal, South Africa T Gwetu --- Department of Obstetrics and Gynaecology, Grey’s Hospital, South Africa D Labadarios --- Stellenbosch University, South Africa E Muller --- University of Stellenbosch, South Africa FJ Veldman --- , South Africa C Ellis --- University of Pretoria, South Africa SM Kassier --- University of KwaZulu-Natal, South Africa -
A plant-based dietary approach to the management of type 2 diabetes mellitus in South Africa: short communication of a multiple-case study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Nanine Wyma --- Physicians Association for Nutrition South Africa, South Africa Christi Niesing --- North-West University, South Africa Andrew KL Robinson --- Physicians Association for Nutrition South Africa, South Africa Petra Bester --- North-West University, South Africa -
What Science Can You Teach Without Language? A Conversation with Timothy Wangusa
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Patrick Mangeni --- Makerere University, UgandaThis biographical dialogue with Timothy Wangusa explores the interface between indigenous culture, Christianity and education in Uganda, how this disrupted the indigenous cultural base and practice and continued to inform and impact lives and culture in Uganda. It interrogates the... -
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... -
Winter storms: a potential threat to African oystercatchers Haematopus moquini
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LG Underhill --- University of Cape Town, South AfricaSubstantial effort has gone into identifying threats to the African oystercatcher Haematopus moquini, a species of seabird native to the mainland coasts and offshore islands of southern Africa. Winter storms represent a possible further threat owing to the potential to... -
Long-term changes in petrel populations on Inaccessible Island, Tristan da Cunha, inferred from the diet of Brown Skuas Stercorarius antarcticus
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Peter G Ryan --- University of Cape Town, South AfricaPetrels that breed in burrows and return to their colonies after dark are among the most poorly studied seabirds. Brown Skuas Stercorarius antarcticus (family Stercorariidae) are major predators of burrowing petrels at many seabird breeding islands in the Southern Ocean,... -
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... -
Cultivation of honeybush (Cyclopia spp.) in neo-colonial and multispecies landscapes of South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Sthembile Ndwandwe --- University of Cape Town, South Africa Roderick Juba --- , South Africa Matthew Sephton --- , South AfricaThe indigenous wild plants of Southern Africa are intertwined with human cultures, histories and livelihoods. By focusing on commercial cultivation of a wild plant, honeybush (Cyclopia spp.), an indigenous plant that is endemic to parts of South Africa, we discuss... -
The making, unmaking and adaptation of Mayeyi multispecies entanglements within the Kwando-Linyanti wetlands: eighteenth century to 1990
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Jessica-Jane Lavelle --- University of Cape Town, South AfricaThe Kwando-Linyanti wetlands of Namibia are known for their rivers, floodplains and woodlands with abundant wildlife and a diversity of birds and fish. Within these landscapes reside the Mayeyi, a Bantu-speaking people whose culture is closely entangled with the wetlands... -
Influence of different temperatures on seedling growth and development of Calobota sericea, a semi-arid rangeland species of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois Müller --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South Africa Letty Masemola --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South Africa Fortune Manganyi --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South Africa Nothando Ngcobo --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South AfricaThis study determined how temperature affected the early growth of seedlings of Calobota sericea (Thunb.) Boatwr. & B.-E.van Wyk. One-month-old C. sericea seedlings were grown at constant temperatures of 2.5, 5, 10 and 20 °C for 30 days. After 30... -
Vegetation diversity and composition in relation to different grazing intensity levels in an arid environment in Jordan
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Salman D Al-Kofahi --- The Hashemite University, Jordan Mohammed N Sawalhah --- The Hashemite University, Jordan Ahmad E Abu Dkhineh --- , JordanGrazing practices fundamentally shape plant community composition and biodiversity worldwide, more importantly in water-limited environments. This study aimed to investigate plant community composition, species distribution of occurrence and diversity indices in an arid rangeland under different grazing intensities. The quadrat... -
Assessment of the impact of woody species encroachment on plant species diversity and the livelihood of pastoralists in southeastern Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Abdulhakim Mahmud --- Madda Walabu University, Ethiopia Habte Telila --- Madda Walabu University, Ethiopia Lemessa Kumsa --- Adama Science and Technology University, EthiopiaThe study aimed to assess the encroachment of woody plants on the rangelands of the Dallo Manna district of Bale Zone, and their impact on plant species diversity and pastoral livelihoods. Plant data were collected from 45 plots at encroaching... -
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... -
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... -
Sustainability practices, sustainable development goals and the hospitality sector: perspectives from Sri Lankan chain hotels
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Janith Iddawala --- NSBM Green University, Sri Lanka Binuri Mehara Welengoda --- NSBM Green University, Sri Lanka Banudee Thisali Rathnayaka --- NSBM Green University, Sri LankaDespite being an industry at the forefront of adopting sustainable practices, there has been a continued paucity of hospitality research focusing on the extent of adoption of sustainability practices and their contribution towards achieving the sustainable development goals (SDGs) from... -
The future of AI: hospitality and tourism perspectives
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Georges El Hajal --- NHL Stenden University of Applied Sciences, The NetherlandsThe Hotel Management School Leeuwarden and the European Tourism Futures Institute organised a webinar to discuss and explore how artificial intelligence (AI) will impact the hospitality and tourism industry in the future. The webinar brought together a panel of academics,... -
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... -
Psychological empowerment and job burnout in Chinese kindergarten teachers: The mediating effect of occupational stress
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ruiqian Li --- College of Teacher Education, Shaoxing University, China Jie Hou --- College of Teacher Education, Shaoxing University, China Xiongying Liu --- College of Teacher Education, Shaoxing University, China Tong Shen --- College of Teacher Education, Shaoxing University, China Jiaying Xu --- College of Teacher Education, Shaoxing University, China Ziyu Wu --- College of Teacher Education, Shaoxing University, ChinaWe explored the role of occupational stress in the relationship between psychological empowerment and job burnout in kindergarten teachers. Chinese female kindergarten teachers (n = 243) were participants (mean age = 28.2 years, SD = 5.08 years; specialist and below... -
A review of the reported and future potential ecological impacts of the invasive freshwater snail Tarebia granifera in South Africa.
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JJ Pearson --- North-West University, South Africa R Gerber --- North-West University, South Africa W Malherbe --- North-West University, South Africa NJ Smit --- North-West University, South Africa L de Necker --- North-West University, South AfricaThe Southeast Asian gastropod Tarebia granifera is an invasive freshwater snail across several continents. Our review summarises the impacts of this invasive snail on invaded aquatic ecosystems. The most important impacts are those related to their ability to reproduce quickly... -
Assessing the extent to which African wetland inventories can report to the global targets on biodiversity, including Goal A of the Global Biodiversity Framework
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MM Sadiki --- University of Pretoria, RSA H van Deventer --- University of Pretoria, RSA CD Hansen --- University of Pretoria, RSAWetlands face global threats with estimates suggesting a loss ranging from 21% to 85% of their original extent. Africa’s wetlands, covering about 4.4% of the continent, provide crucial services to millions of people and harbour significant biodiversity. This study assesses... -
A rapid fishery assessment to collect biological information and life-history parameters for rednose labeo Labeo rosae and Mozambique tilapia Oreochromis mossambicus in Loskop Dam, Olifants River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HA Hlungwani --- University of Limpopo, South Africa SM Marr --- University of Limpopo, South Africa OLF Weyl --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa AC Hoffman --- , South Africa H Botha --- University of Limpopo, South Africa JR Sara --- University of Limpopo, South AfricaA 2-week rapid fishery assessment using various sampling gears was conducted to collect life-history data on rednose labeo Labeo rosae and Mozambique tilapia Oreochromis mossambicus in Loskop Dam on the Olifants River, Mpumalanga Province, South Africa. These native species were... -
‘Vampire birds’: diet metabarcoding reveals that migrating Woodchat Shrikes Lanius senator consume engorged camel ticks in a desert stopover site
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Crinan Jarrett --- Swiss Ornithological Institute, Switzerland Marc Illa --- Institut Català d’Ornitologia, Nat-Museu de Ciències Naturals de Barcelona, Spain Marta Burri --- Swiss Ornithological Institute, Switzerland Gabriel Marcacci --- Swiss Ornithological Institute, Switzerland Vanessa A Mata --- Universidade do Porto, Portugal Maria Luisa Boglino --- Konrad-Lorenz Institute of Ethology, University of Veterinary Medicine, Austria Oumnia Himmi --- Mohammed V University of Rabat, Institut Scientifique, Morocco Ivan Maggini --- Konrad-Lorenz Institute of Ethology, University of Veterinary Medicine, Austria Barbara Helm --- Swiss Ornithological Institute, SwitzerlandData on the diets of Afro-Palearctic migratory birds outside their breeding grounds are scarce, despite the importance of feeding during the migratory journey. Here, we report on anecdotal findings from a study in which we used diet metabarcoding to analyse... -
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... -
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... -
Estimation of standing crop biomass in rangelands of the Middle Atlas mountains using remote sensing data
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S Boukrouh --- University Mohammed VI Polytechnic (UM6P), Morocco Y Bouazzaoui --- Institut Agronomique et Vétérinaire Hassan II, Morocco A El Aich --- Institut Agronomique et Vétérinaire Hassan II, Morocco H Mahyou --- Institut National de la Recherche Agronomique, Morocco M Chikhaoui --- Institut Agronomique et Vétérinaire Hassan II, Morocco M Ait Lafkih --- Institut Agronomique et Vétérinaire Hassan II, Morocco O N’Dorma --- Institut Agronomique et Vétérinaire Hassan II, Morocco CL Alados --- Instituto Pirenaico de Ecología (CSIC), SpainIn the Middle Atlas rangelands, traditional methods for estimating standing crop biomass are labour-intensive and impractical. Remote sensing offers an initiative for standing crop biomass large-scale monitoring. The aim of this study was to estimate standing crop biomass, comprising annual... -
Why traditional diets are more relevant than ever today
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Karen Cheryl Morris --- Naturopath, South Africa Thandi Puoane --- University of the Western Cape, SAThe current epidemic of obesity and its co-morbidities reflect an urgent need to reform our modern eating patterns. This commentary proposes the reclamation of our traditional diets of the precolonial, preindustrial era, which are argued to be more sustainable, in... -
The impact of planting dates and hybrid selection on sunflower seed yield and oil content
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Safiah Ma’ali --- Agricultural Research Council–Grain Crops, South Africa Nicolene Cochrane --- Agricultural Research Council–Biometry, South Africa William Makgoga --- Agricultural Research Council–Grain Crops, South Africa Jan Erasmus --- Agricultural Research Council–Grain Crops, South AfricaSuitable planting dates and hybrid selection are crucial in optimising yield, component traits and oil production in sunflower (Helianthus annuus L.). In South Africa, there is limited information on the effects of planting dates on currently available sunflower hybrids in... -
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... -
First report of the giant conifer aphid, Cinara pinivora (Wilson) and the Monterey pine aphid, Essigella californica (Essig) (Hemiptera: Aphididae) in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Privilege T Makunde --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Bernard Slippers --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Brett P Hurley --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South AfricaPine aphids represent a significant group of insect pests in coniferous ecosystems worldwide. To assess pine aphid prevalence and potentially new introductions in South Africa, aphid samples from various pine-growing regions were collected through national surveys conducted by the Tree... -
The influence of row width, planting density and cultivars on seedling establishment of no-till spring wheat (Triticum aestivum L.) in Western Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P.C. Tolmay --- ARC-Small Grain Institute, South Africa G.A. Agenbag --- Department of Agronomy, University of Stellenbosch, South Africa M.B. Hardy --- Institute for Plant Production, Department of Agriculture: Western Cape, South AfricaLow rainfall during the wheat growing season in Mediterranean climates leads to variation in growth period and this may constrain yield. Low seedling survival is among the factors that can limit yield in the Western Cape. Seedling survival rates of... -
From forage to multifunctionality: shifting perceptions of rangeland ecosystem services in the journals of the Grassland Society of Southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Craig D Morris --- University of KwaZulu-Natal, South AfricaRangelands offer various goods and ecosystem services (ES) besides providing forage for commercial livestock production. An analysis of research published in the journals of the Grassland Society of Southern Africa from 1966 to 2023 revealed a widening focus on different... -
Nearly six decades of grazing research published by the Grassland Society of Southern Africa: trends, recommendations and gaps
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G Arena --- , South Africa H-J Hawkins --- , South AfricaWe reviewed research on grazing in extensive rangelands published by the Grassland Society of Southern Africa’s (GSSA) flagship journal, founded in 1966. We aimed to identify and synthesise emerging themes, trends, key recommendations and research gaps. From 1966 to 2023,... -
Rethinking radical veld improvement: a sustainable approach to grazing land restoration?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: KP Kirkman --- University of KwaZulu-Natal, South AfricaRadical veld improvement (RVI), a concept explored in southern Africa during the mid to late 1900s, aimed to intensify agricultural landscapes by enhancing veld productivity by incorporating productive forage grasses or legumes, soil nutrient enrichment, or a combination of both... -
Overlooked forbs: implications for rangeland biodiversity and function in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Sindiso Nkuna --- University of KwaZulu-Natal, South Africa Craig Morris --- University of KwaZulu-Natal, South AfricaForbs are a diverse component of grassy ecosystems, offering various vital ecosystem services while enhancing system resilience. However, herbaceous non-grass species are not routinely enumerated, nor their significance evaluated. We examined the extent to which grassland forbs have been considered... -
Historical trajectories and current perspectives on sub-Saharan wildland fire science and management in select scientific literature
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Devan Allen McGranahan --- Livestock and Range Research Laboratory, USDA Agricultural Research Service, USA Kevin P Kirkman --- Grassland Science, University of KwaZulu-Natal, South AfricaFire has long been a fixture on African landscapes to which ecosystems, wildlife and people have adapted. Not surprisingly, wildland fire science in Africa has also undergone substantial change and development. Three broad eras of wildland fire science and management... -
People and rangelands: a review of the contribution of the African Journal of Range and Forage Science to advancing knowledge on the human dimensions of African rangelands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Wayne Twine --- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, South AfricaThe social dimensions of rangeland systems are increasingly highlighted in international rangelands literature. This paper presents a systematic review of the African Journal of Range and Forage Science from 1966 to 2023 to evaluate its contributions to this scholarship. The... -
A review of the contribution of the Grassland Society of Southern Africa to understanding conservation and wildlife research and management in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mike JS Peel --- Agricultural Research Council – Animal Production Institute, South Africa Peter JK Zacharias --- , South AfricaWe identified 440 papers and 81 book reviews published chronologically by the Grassland Society of Southern Africa (GSSA) over 60 years, determined as making a contribution to understanding the drivers and response variables affecting the management and use of grassland... -
Establishment of determinants to influence community acceptance towards water reuse in India
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kirti Goyal --- Lovely Professional University, India Arun Kumar --- Indian Institute of Technology, IndiaWorldwide, rising water scarcity calls for alternatives to supplement the water supplies. Water reuse is an emerging source, ensuring water safety and environmental sustainability, but its growth is hindered due to sparse public acceptance. In this study, a social survey... -
Spatio-temporal dynamics of anthropogenic land-use pressures on temporarily closed estuaries in South Africa: a four-decade remote sensing analysis
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B McKelvey --- Oceanographic Research Institute, South African Association for Marine Biological Research, South Africa CF MacKay --- Oceanographic Research Institute, South African Association for Marine Biological Research, South AfricaLand-cover change is the leading cause of habitat loss globally. The extent of estuarine habitat loss and land-use pressures are understudied in South Africa, particularly in the numerically dominant temporarily closed estuaries. Remote sensing techniques are effective tools for monitoring... -
Influence of physico-chemical parameters on benthic macroinvertebrate community dynamics in Isiukhu River, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Emmanuel Mzungu --- Kenya Fisheries Service (Western Region), Kenya William A Shivoga --- Masinde Muliro University of Science and Technology, Kenya Dorothy K Lukhabi --- Africa Centre of Excellence in Coastal Resilience (ACECoR), Ghana Anthony W Sifuna --- Masinde Muliro University of Science and Technology, KenyaThe current study investigated the influence of physico-chemical parameters on macroinvertebrates distribution, abundance and diversity throughout the Isiukhu River. The sampling sites were selected along the Isiukhu River based on distinct land use types at the upstream, midstream and downstream... -
Age and growth of the invasive bluegill Lepomis macrochirus (Rafinesque, 1810) from the Howison’s Poort Dam, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PM Ndaleni --- South African Institute for Aquatic Biodiversity, South Africa L Mofu --- South African Institute for Aquatic Biodiversity, South AfricaThe present study assessed the age and growth of bluegill, Lepomis macrochirus (Rafinesque, 1810) from Howison’s Poort Dam, Eastern Cape. Precision between readers and structures (burnt and unburnt) of otoliths were estimated, and the aging error was determined by the... -
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... -
Antagonistic aria: vocalisations of the male slender feather-tailed leaf-toed gecko (Gekkonidae: Kolekanos plumicaudus)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Francois S Becker --- National Museum of Namibia, Ministry of Education, Arts and Culture, Namibia Pedro Vaz Pinto --- CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Laboratório Associado, Universidade do Porto, Portugal Javier Lobón-Rovira --- CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Laboratório Associado, Universidade do Porto, PortugalKolekanos plumicaudus is a gecko endemic to the Namib Desert in south-western Angola. It is distantly related to all other geckos in the region, except for its one congener, K. spinicaudus. There have been no scientific accounts on the social... -
Yellow-billed Kite Milvus aegyptius nesting dynamics and breeding success across a human-modified landscape
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Roger N Porter --- , William W Howells --- , Ingrid B Weiersbye --- , South Africa Ben Hoffman --- University of KwaZulu-Natal, South Africa Sean N Porter --- Oceanographic Research Institute (ORI), South AfricaAnthropogenic habitat transformation is one of the leading causes of biodiversity decline. Migratory birds, particularly many raptor species, are increasingly threatened by global environmental change. We investigated the nesting dynamics and potential determinants of breeding success in a population of... -
Ethical considerations in flamingo tourism: insights from a Dutch Caribbean resort study
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Chiara Niehorster Rheinboldt --- Hotel Management School Leeuwarden, The Netherlands Joost IJsselmuiden --- Hotel Management School Leeuwarden, The Netherlands Rodney Westerlaken --- Hotel Management School Leeuwarden, The NetherlandsThis study investigates the impact of flamingo encounters on guest satisfaction and ethical considerations at a 5-star resort in the Dutch Caribbean. Using a quantitative approach, the researchers surveyed 50 resort guests to explore perceptions of animal tourism, flamingo experiences,... -
Phases of STI cycle: Countries comparative analysis
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Eugeny Balatsky --- Financial University under the Government of the Russian Federation, Russian Federation Svetlana Ushakova --- Politics and Law in Science and Technology, Russian Federation Vadim Malahov [cor1] Maxim Yurevich --- Financial University under the Government of the Russian Federation, Russian FederationThis article focuses on a comparative analysis of the main technological development stages of a country. For the purpose of assessing the S&T potential of countries, a method of creating a scientific and technological balance is proposed. This approach unites... -
Case study: nutrition and hydration support in a child with Cornelia de Lange and short bowel syndrome on home parenteral nutrition
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Cecile van Niekerk --- University of Pretoria, South Africa Christa Ellis --- University of Pretoria, South Africa Claire Martin --- University of Pretoria, South AfricaCornelia de Lange syndrome (CdLS) (NIPBL variant) is a rare genetic disorder, characterised by intellectual and congenital abnormalities, ultimately resulting in growth and developmental delays. This case report describes a 7-year-old boy presenting with CdLS. The patient had a percutaneous... -
Spillover effects of tree-planting programmes on household tree planting for fuelwood and livelihoods in non-urban areas of Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Yusuph John Kulindwa --- Moshi Co-operative University, TanzaniaA spillover effect of tree planting programmes (TPs) and of the independent planting of trees for fuelwood by forest-dependent households is that deforested areas in developing countries have not been restored due to the high demand for fuelwood, which outstrips... -
Integrating rainfall data into site-specific modelling to improve forest productivity estimation of eucalypt hybrid species in coastal Zululand, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Morries Chauke --- School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, South Africa Henry Mwambi --- School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, South Africa Antonio C Ferraz-Filho --- Federal University of Piauí, BrazilThis study aimed to develop a dynamic dominant height model and explore the effects of rainfall on the growth dynamics of Eucalyptus grandis × Eucalyptus urophylla. This species is grown for wood production in South Africa, and accurately estimating site... -
Status of minority languages in South Africa: the case of the exclusion of isiHlubi in schools
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Rockie Sibanda --- Cultural Studies and Applied Linguistics, University of Johannesburg, South Africa Vuyiswa Mankayi --- Cultural Studies and Applied Linguistics, University of Johannesburg, South AfricaThis study aims to contribute to understanding the complexities surrounding minority languages in South Africa, with isiHlubi serving as a poignant case study. It explores the nuances and complexities inherent in the exclusion of isiHlubi in schools in Kokstad, KwaZulu-Natal... -
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... -
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... -
Reimagining corporate planning practices for operational flexibility and sustainability in emerging economy: A reflection on the Nigerian private sector
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Daniel E. Ufua --- Centre for Economic Policy and Development Research (CEPDeR ), Mamdouh Abdulaziz Saleh Al-Faryan --- The Saudi Economic Association, Saudi Arabia Basit Ali --- ILMA University, PakistanThis study examined corporate planning and operational flexibility in an emerging economy, the Nigerian private sector. The research aimed to develop learning on the practice of corporate planning, with a view from the perspectives of the affected stakeholders who are... -
Role of subregional cooperation towards environmental conservation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Robita Lee Robinson --- Universiti Malaya, Malaysia Angathevar Baskaran --- Universiti Malaya, Malaysia Sonia Kumari Selvarajan --- Universiti Malaya, MalaysiaThis study examines the role of subregional cooperation in advancing environmental conservation within the ASEAN framework, focusing specifically on the Indonesia-Malaysia-Thailand Growth Triangle (IMT-GT) and its institutional body, the Centre for IMT-GT Subregional Cooperation (CIMT). Through qualitative analysis based on... -
Comparative ecology of crustaceans in relation to physico-chemical parameters from three rivers in southern Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B Sai Ram Pattnaik --- Wolaita Sodo University, Ethiopia Aynalem Eyasu Baldada --- Wolaita Sodo University, EthiopiaThis study documents the diversity and spatio-temporal distribution of crustaceans from three perennial rivers (Beshir, Kalte and Olbiyawa) that flow through an urban area in Wolaita Sodo town, southern Ethiopia. Field data and laboratory-based spatio-temporal scale studies were employed for... -
The first record of Cape Clawless Otters Aonyx capensis predating on African Penguins Spheniscus demersus
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Albert Snyman --- Southern African Foundation for the Conservation of Coastal Birds (SANCCOB), South Africa Arne Purves --- , South Africa Alison Kock --- , South Africa Mashudu H Mashau --- , South Africa Faroeshka Rodgers --- , South Africa Katrin Ludynia --- Southern African Foundation for the Conservation of Coastal Birds (SANCCOB), South AfricaThe African Penguin Spheniscus demersus, a critically endangered seabird endemic to southern Africa, faces substantial threats from terrestrial predators at its mainland colonies. Correct identification of the predator species is essential for effective conservation management. This study provides the first... -
Occurrence and persistence of Blacksmith Lapwings Vanellus armatus and Crowned Lapwings V. coronatus and their reproductive success in an urban mosaic landscape
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Feziwe Phoswa --- School of Life Sciences, University of KwaZulu-Natal, South Africa S Thobeka Gumede --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaUrbanised landscapes continue to expand globally, leading to increased habitat fragmentation, which creates a mosaic of natural and managed landscapes. These environmental changes have an impact on bird populations, and are reflected in the declining populations of open-habitat species. Despite... -
Behavioural responses to air temperature change in helmeted guineafowl Numida meleagris
Item type: Journal Article • Journal: African Zoology • Authors: Johann H van Niekerk --- University of South Africa, South Africa Marta Rodríguez-Rey --- Universidad de Alcalá, Forest Ecology and Restoration Research Group (FORECO), Spain Fabián Casas --- Universidad de Granada, Spain Giovanni Forcina --- Global Change Ecology and Evolution Research Group (GloCEE)/Soil Biology and Subterranean Ecosystems Research Group (GIBSES), SpainDeciphering the behavioural responses of helmeted guineafowl Numida meleagris (Linnaeus, 1758) to temperature variation is key to understanding its eco-ethology and implementing sound management strategies. Here, we tested the ‘warmer together’ hypothesis, which states that thermoregulatory cost reduction (i.e. body... -
Understanding the distribution and densities of ghost crabs (Ocypode spp.) to improve management of hawksbill turtle Eretmochelys imbricata nesting sites
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Godding --- , Seychelles S Evans --- , Seychelles M Brown --- School of Life Sciences, University of KwaZulu-Natal, South AfricaPredation on sea turtle nests is a natural occurrence at nesting beaches worldwide, with various animals consuming the eggs and hatchlings as part of the ecosystem. Cousine Island in the Seychelles Archipelago is an important nesting site for the Critically... -
Vegetation structure and defoliation patterns in heterogeneous grasslands under two herbage allowance levels
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Felipe Casalás --- University of the Republic, Uruguay Nicolas Caram --- University of the Republic, Uruguay Pablo Soca --- University of the Republic, Uruguay Marcelo Wallau --- University of Florida, USA Pablo Boggiano --- University of the Republic, UruguayUnderstanding the relationship between vegetation attributes and defoliation patterns at multiple spatiotemporal scales is crucial for optimising grazing systems. This study assessed the structural attributes of vegetation and the effects of defoliation frequency and intensity in a campos grassland under... -
Veld condition assessments are unrepresentative at the edges of rotational burn management blocks where grass community composition is atypical
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anne E Goodenough --- School of Education and Science, University of Gloucestershire, UK William S Carpenter --- School of Education and Science, University of Gloucestershire, UK Hannah Toms --- School of Education and Science, University of Gloucestershire, UK Benjamin A Bayliss --- School of Education and Science, University of Gloucestershire, UK Chloe J Cookes --- School of Education and Science, University of Gloucestershire, UK Lena Buerger --- School of Education and Science, University of Gloucestershire, UK Chloe L Cogdell --- School of Education and Science, University of Gloucestershire, UK Sara L Evans --- School of Education and Science, University of Gloucestershire, UK Tom Lancashire --- School of Education and Science, University of Gloucestershire, UK Fern D Kenyon-Hamp --- School of Education and Science, University of Gloucestershire, UK Ruari J MacGregor --- School of Education and Science, University of Gloucestershire, UK Sarah A Morshead --- School of Education and Science, University of Gloucestershire, UK Candace M Pattison --- School of Education and Science, University of Gloucestershire, UK Eli Shrubb --- School of Education and Science, University of Gloucestershire, UK Hannah D Upshall --- School of Education and Science, University of Gloucestershire, UK Charlene R Watts --- School of Education and Science, University of Gloucestershire, UK Lynne MacTavish --- Mankwe Wildlife Reserve, South Africa Melissa Dawson --- Mankwe Wildlife Reserve, South Africa Adam G Hart --- School of Education and Science, University of Gloucestershire, UKFenced reserves provide benefits for wildlife but are vulnerable to overgrazing. Accurate veld condition assessments are essential to inform stocking density, translocation/culling interventions and burn management decisions. Here, for the first time, we test whether atypical changes in the grass... -
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... -
Ethnic community languages in contemporary social media advertisements in Tanzania
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Emmanuel Ilonga --- Dar es Salaam University College of Education (DUCE), TanzaniaA speech community’s expectation is to see its language develop. However, such an imaginative prospect may not materialise due to the asymmetrical power dynamics between influential and less influential speech communities. Consequently, less influential societies are forced to depend on... -
Psychotherapy in South African indigenous languages: Positioning isiXhosa as a language of symbolisation
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Ntokozo Gqweta --- University of the Witwatersrand, South AfricaThe sociopolitical history of language use in South Africa is controversial and complex. This article utilises postcolonial theory to problematise the historical pattern of language use in South Africa to oppress black people. African psychology and Afrocentricity are used to... -
Transforming language discourse in higher education through reading modules in African languages
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Nkidi Phatudi --- College of Education, University of South Africa, Millicent Ngema --- College of Education, University of South Africa,The discourses around teaching and learning in South Africa are intense, with English still being a preferred language of learning and teaching at higher education level. The dominance of English as the language that unifies societies economically and politically marginalises... -
Names of the days in the seven-day week in Bantu languages of Tanzania
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Amani Lusekelo --- University of Dar es Salaam,Studies about the names of the days of the week in Eastern African societies have previously focused on a single ethnic group. Therefore, it is necessary to investigate the names across Bantu1 languages of Tanzania in order to set apart... -
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... -
Political economy of languages in South African higher education
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Kealeboga Aiseng --- University of the Witwatersrand, South AfricaThis study examines the political economy of languages in South African universities, focusing on the sustained dominance of English and Afrikaans despite policy shifts promoting multilingualism. While some institutions have taken steps to incorporate indigenous languages into their teaching frameworks,... -
Proxy variables to represent the productive capacity in a forest growth and yield model for eucalypt hybrid plantations in north-eastern Bahia, Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Mariana Futia Taquetti --- Universidade Federal de Viçosa, Brazil Carlos Pedro Boechat Soares --- Universidade Federal de Viçosa, Brazil Helio Garcia Leite --- Universidade Federal de Viçosa, Brazil Álvaro Augusto Vieira Soares --- Universidade Federal de Uberlândia, Instituto de Ciências Agrárias, Brazil Gilson Fernandes da Silva --- Universidade Federal do Espírito Santo, BrazilThe present study aimed to evaluate proxy variables to represent the productive capacity of the sites in a forest growth and yield model for plantations of Eucalyptus urophylla × Eucalyptus grandis hybrid, considering them in a linear and a linear... -
Contagion from crypto exchange hacks: Wealth effect or portfolio rebalancing?
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Dung Thi Ngoc Pham --- College of Technology and Design, University of Economics Ho Chi Minh City, Vietnam Chune Young Chung --- Ton Duc Thang University, Vietnam Doojin Ryu --- Sungkyunkwan University, KoreaThis study explores the contagion mechanism from the cryptocurrency market to stock markets of 30 countries with the highest Bitcoin trading volumes, focusing on cyberattacks targeting cryptocurrency exchanges. We identify investor-induced contagion through the wealth effect as the primary transmission... -
Effects of forest cover and fragmentation on bird functional guilds in understorey birds in shade coffee habitats of southwest Ethiopia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Gelaye Gebremichael --- College of Natural Sciences, Jimma University, Ethiopia Anagaw Atickem --- Colleges of Natural Sciences, Addis Ababa University, Ethiopia Seid Tiku Mereta --- Jimma University, Ethiopia Luc Lens --- Ghent University, BelgiumHabitat loss and fragmentation, as consequences of anthropogenic land use changes, are the main drivers of global biodiversity loss. In this study, we evaluate the response of functional guilds in forest understorey bird communities to the amount of forest cover... -
A baseline survey of coastal birds in the Greater Bazaruto region, Mozambique
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Peter G Ryan --- University of Cape Town, South Africa Cliff Dorse --- , South Africa Dave Gilroy --- , Mozambique James Hogg --- , United Kingdom Albert McLean --- , South Africa Christine Read --- , South Africa Evan Trotzuk --- African Parks Mozambique, Mozambique Gary Allport --- The David Attenborough Building, United KingdomWe report the numbers of coastal birds in the Greater Bazaruto Important Bird and Biodiversity Area (IBA), Mozambique. In November–December 2023, we counted waterbirds foraging on tidal flats and at roost sites in the San Sebastian (São Sebastião) Peninsula, Bazaruto... -
Diet composition of the Marsh Owl Asio capensis at the Merja Zerga coastal lagoon, northwestern Morocco
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abdeslam Rihane --- Regional Center for Education and Training (CRMEF) Casablanca-Settat, Morocco Sidi Imad Cherkaoui --- Institut Scientifique, Research Center: Geophysics, Natural Patrimony and Green Chemistry (GEOPAC), MoroccoThe diet of the Marsh Owl Asio capensis (family Strigidae) was examined at Merja Zerga coastal lagoon and wetland on the Gharb Plain, northwestern Morocco. The analysis was carried out on several small batches of regurgitated pellets, collected in January... -
Thoughts of suicide and self-harm: A national study on young people presenting to non-paediatric acute hospitals in Ireland
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Katerina Kavalidou --- , Ireland James O’Mahony --- University College Cork, Ireland Sally-Ann Lovejoy --- , Ireland Fiona McNicholas --- University College Dublin, Ireland Vincent Russell --- , IrelandBackground: In Ireland, acute hospital emergency departments (ED) become the default service for youth aged 16 to 18 years; and in the absence of paediatric EDs, for youth under 16 years. No previous research has explored adolescent presentations to non-paediatric... -
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... -
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... -
The nominal impacts of L2 on L1: A case of Swahili on the Kinga language
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Obadia Yohana Mbilinyi --- University School of Languages, Gujarat University, India Jagdish Joshi --- University School of Languages, Gujarat University, IndiaThis study is about the nominal impact of L2 (Swahili) on L1 (Kinga) as a result of their contact. The objective was to identify the extent to which L2 lexicon has penetrated L1 lexicon, this study is significant as it... -
Effectiveness of YouTube in the learning and preservation of the Yoruba language in Nigeria
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Babatunde Adeyeye --- North-West University, South Africa Abiodun Salawu --- North-West University, South AfricaThis study investigated YouTube’s effectiveness in the learning and preservation of the Yoruba language among youths of Ota, Ogun State, Nigeria. Data was collected through a mixed-methods approach using a survey and content analysis. Findings demonstrate the awareness (85%) of... -
Exploring the interplay of local language(s) and transformation to facilitate communication and change in (South) Africa
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Mogomme Alpheus Masoga --- University of the Free State, South Africa Allucia Lulu Shokane --- University of Zululand, South AfricaThis research explores local language(s) and transformation as key facilitators of a dynamic interplay between the power of communication and the capacity for change. It is argued that language serves as a multifaceted tool that not only conveys thoughts and... -
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... -
Distribution and status of reptile species in south-eastern Zimbabwe
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Kurt M van Wyk --- University of the Western Cape, South Africa Bryan Maritz --- University of the Western Cape, South Africa Bruce W Clegg --- Malilangwe Trust, Malilangwe Wildlife Reserve, ZimbabweWhile the loss of biodiversity in response to anthropogenic drivers is well documented, reptiles are rarely prioritised in global conservation efforts. Although more than 20% of all reptile species are currently listed as threatened, and a growing body of evidence... -
Establishing a basis for recognising marine ‘other effective area-based conservation measures’ (OECMs) in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Kirkman --- Fisheries and the Environment (DFFE), South Africa P Kowalski --- , South Africa SD Holness --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa LJ Atkinson --- , South Africa R Brand --- Western Cape Government, South Africa L Dunga --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa TP Fairweather --- Fisheries and the Environment (DFFE), South Africa T Goldman --- Rhodes University, South Africa D Marnewick --- Eastern and Southern Africa Regional Office, South Africa J Nhleko --- Fisheries and the Environment (DFFE), South Africa R Peter --- Fisheries and the Environment (DFFE), South Africa C Smith --- World Wide Fund for Nature – South Africa (WWF-SA), South Africa MG van der Bank --- South African National Biodiversity Institute (SANBI), Kirstenbosch Research Centre, South Africa G van der Heever --- Fisheries and the Environment (DFFE), South Africa L van Niekerk --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa KA Wright --- Wildlands Conservation Trust (WILDTRUST), South Africa KJ Sink --- Institute for Coastal and Marine Research, Nelson Mandela University, South AfricaThe concept of ‘other effective area-based conservation measures’ (OECMs) and its technical guidance provide opportunities for recognising a broader range of area-based management measures that contribute to biodiversity conservation outside of protected areas. However, progress towards the recognition of OECMs... -
Comparison of light trap designs for assessments of positively phototactic invertebrate and larval assemblages in urbanised coastal systems
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NP Mpanza --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa P Pattrick --- South African Environmental Observation Network (SAEON), Elwandle Coastal Node, South Africa F Porri --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaThe construction of seawalls is increasing the extent of artificial infrastructure along coastlines globally. Such development compromises substrate complexity of the natural environment which is crucial for major life functions of larvae (invertebrates and fish). Understanding the physical and biological... -
Too cold to sing: Warbler dawn chorus affected by environmental factors in a high-elevation wetland
Item type: Journal Article • Journal: African Zoology • Authors: Toka Mosikidi --- University of the Free State, South Africa Nicholas R Friedman --- Leibniz Institute for the Study of Biodiversity Change, Germany Nicholas Le Maitre --- University of the Free State, South Africa Sandy-Lynn Steenhuisen --- University of the Free State, South Africa Vincent Ralph Clark --- University of the Free State, South Africa Kyle John Lloyd --- University of the Free State, South Africa Aliza le Roux --- University of the Free State, South AfricaMany bird species take part in a dawn chorus, the phenomenon in which the community of songbirds in a particular habitat, show a peak of vocal activity around dawn. Understanding the species-specific extrinsic factors affecting this intensive singing activity is... -
Factors influencing participation in the planting for food and jobs programme: Empirical evidence from maize farmers in Ejura Sekyedumase, Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Addison Kwasi Akowuah --- Kwame Nkrumah University of Science and Technology (KNUST), Ghana John-Eudes Andivi Bakang --- Kwame Nkrumah University of Science and Technology (KNUST), Ghana Enoch Kwame Tham-Agyekum --- Kwame Nkrumah University of Science and Technology (KNUST), Ghana Fred Ankuyi --- Kwame Nkrumah University of Science and Technology (KNUST), Ghana Akua Yeboah Oduro-Owusu --- Ghana Cocoa Board (COCOBOD), Ghana Collins Osei --- Kwame Nkrumah University of Science and Technology (KNUST), Ghana Solomon Asirifi --- Ghana Cocoa Board (COCOBOD), Ghana Pascal Benson Atiglah --- St Francis’ College of Education, GhanaPlanting for Food and Jobs (PFJ) as a development intervention has come with many successes. However, the recent concerns about its gradually dwindling prospects call for academics to study farmers’ participation and motivation, focusing on the Ejura Sekyedumase Municipality in... -
Language matters: dietitians’ lived experiences of language barriers during nutrition counselling with Sesotho-speaking mothers in the first 1 000 days of life
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Phozia Jansen --- University of the Free State, South Africa Lucia N Meko --- University of the Free State, South Africa Louise van den Berg --- University of the Free State, South Africa -
Wintering grounds under protection: population stability and conservation of migrating waders at Europa Island, western Indian Ocean
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Florinah Razafimandimby --- Université de La Réunion, France Maxime Amy --- TAAF (Terres australes et antarctiques françaises), France Matthieu Le Corre --- Université de La Réunion, FranceThe tropical western Indian Ocean islands are at the southern limit of the East Africa–West Asia Flyway, but their importance for wintering and conservation of Palearctic waders remains poorly understood. Europa Island, a remote coralline island in the southern Mozambique... -
Inferring regional, habitat and phylogenetic patterns in caliochory from bird nests in a museum collection
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Suzanne J Milton --- Wolwekraal Conservation and Research Organisation, South Africa W Richard J Dean --- Wolwekraal Conservation and Research Organisation, South AfricaCoevolution of plants and animals may lead to features or behaviour that are mutually beneficial. This is exemplified by plant adaptations for seed dispersal, including caliochory, which is the dispersal of seeds by birds in nest materials. Caliochory is a... -
Investigation on the foraging ecology of black crowned cranes at Lake Tana, Ethiopia, in the context of climate change impacts
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SA Zelelew --- Bahir Dar University, Ethiopia C Relton --- , South AfricaThere are significant gaps in understanding the food resources of the black crowned crane in the Lake Tana wetlands. This study examined macroinvertebrates in crane habitats, investigated the impact of rainfall on macroinvertebrates in relation to pollution tolerance, and identified... -
Refinement of a site classification system for South African plantation forestry using regionally downscaled climate model input
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Steven Dovey --- Scion (NZ Forest Research Institute Ltd), New Zealand Jacob Crous --- Sappi Shaw Research Centre, South Africa Yolandi Ernst --- Global Change Institute, University of the Witwatersrand, South AfricaDeemed a climate change hotspot, southern Africa is already experiencing increasing average temperatures associated with extreme weather events, such as drought and flooding. Climate change has already induced many weather and climate extremes in South Africa, and these are likely... -
Silvicultural intervention during re-establishment to reduce mortality in eucalypt plantations, South Africa: early results
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ullrich Hechter --- Mondi South Africa (Pty) Ltd, South Africa Keith M Little --- School of Natural Resources Management, Nelson Mandela University, South Africa Julian Moreno Chan --- Institute for Commercial Forestry Research, South Africa Jacob Crous --- Sappi Shaw Research Centre, South AfricaHigh mortality negatively affects rotation-end yield in pulpwood eucalypt stands. Most forest companies in South Africa aim to achieve +90% survival. To ensure optimal survival, companies implement preventative measures such as the use of high-quality plants and optimum re-establishment practices,... -
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... -
Pastoralist knowledge and perceptions on land degradation and forage diversity loss: a case study in the Bordj Bou Arreridj semi-arid region, Algeria
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lounis Semara --- Mohamed El Bachir El Ibrahimi University of Bordj Bou Arreridj, Algeria Sofiane Bensefia --- Mohamed El Bachir El Ibrahimi University of Bordj Bou Arreridj, Algeria Farida Belkasmi --- Mohamed El Bachir El Ibrahimi University of Bordj Bou Arreridj, Algeria Charefeddine Mouffok --- Ferhat Abbas Setif 1 University, Algeria Abdelaziz Bouzegag --- University Centre of Mila, AlgeriaThis study assessed the level of knowledge and perception of pastoralists in the Bordj Bou Arreridj zone in the semi-arid region of Algeria regarding pastureland degradation and loss of forage species diversity. Through group discussions and field surveys, 100 pastoralists... -
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... -
Managing land use transitions to safeguard transhumance corridors in arid eastern Morocco: challenges and adaptive strategies
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Imane Hamzaoui --- Hassan II Agronomy and Veterinary Medicine Institute, Morocco Mohamed Chikhaoui --- Hassan II Agronomy and Veterinary Medicine Institute, Morocco Nicolas Faysse --- , France Mohamed Taher Sraïri --- Hassan II Agronomy and Veterinary Medicine Institute, MoroccoThe conversion of rangelands and barren lands into agricultural use destabilises fragile pastoralism. This study examines the drivers and impacts of this transformation on pastoralism in Tinghir province, Morocco, using geospatial analysis, semi-structured interviews with pastoralists, discussions with officials and... -
Invasion of Neltuma juliflora (mesquite) and its effects on soil physicochemical properties in a semi-arid rangeland of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Siviwe Odwa Malongweni --- Sol Plaatje University, South AfricaInvasive species threaten ecosystem functions in African rangelands by altering soil properties, and affecting overall health and productivity. This study compared soil physicochemical characteristics under invasive Neltuma juliflora and native Vachellia karroo across two zones (beneath tree canopy versus open... -
An evaluation of tax compliance among small businesses
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Mphagahlele O. Ndlovu --- University of, South Africa Daniel P. Schutte --- North-West University, South Africa -
A sociolinguistic inquiry into code-switching in Tshivenḓa in beerhall environments
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Matodzi Godfrey Sikhwari --- University of Venda, South AfricaThis research article explores code-switching practices in Tshivenḓa-speaking beerhall environments, focusing on the sociolinguistic factors that influence language use. Code-switching, the alternation between languages during conversations, is common in multilingual settings. Beerhalls provide a unique, informal space to observe how... -
Idioms in transition: isiZulu idiomatic expressions used in the taxi industry
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Sineliso Lindokuhle Thabede --- SANTS Private Higher Education Institution, South Africa Dumisani Ephraim Khumalo --- University of South Africa, South AfricaThis study analyses the historical development of isiZulu idiomatic expressions, specifically their expression in the KwaZulu-Natal minibus taxi industry, tracing their evolution from primarily oral traditions to modern visual expressions visible on exteriors and interiors of taxis. Using a hermeneutic... -
Exploration of a sociocultural, ubuntu intervention strategy to enhance first-year students’ academic writing skills at a South African university
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Hlaviso Motlhaka --- School of Education, University of Limpopo, South Africa Khashane S Malatji --- University of Mpumalanga, South AfricaThis qualitative research explores how to enhance the academic writing skills of first-year students at a South African university using a sociocultural intervention based on the ubuntu philosophy. It collects data through interviews, focus groups, and reflective diaries from students... -
Buried voices, hidden languages: The (in)visibility of indigenous South African languages in the South African Journal of African Languages (SAJAL) from 1994 to 2023
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Mlamli Diko --- University of South Africa, South AfricaThe South African Journal of African Languages was officially established in 1981 to advance the visibility and intellectualisation of indigenous South African languages as outlined in its aims and scope. Regrettably, greatly entrenched imperialist ideologies obstruct these languages’ comprehensive visibility... -
Ngabe iziLimi zoMdabo zaseNingizimu Afrika zikulungele ukuthi kufundiswe ngazo? Ukuhunyushelwa esiZulwini kwencwadi yamaKhono eMpilo
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Erick Nkululeko Nzimande --- University of South Africa, South AfricaUkusetshenziwa kweziLimi zaboMdabo zaseNingizimu Afrika njengezilimi zokufundisa ezikoleni nasemfundweni ephakeme kuyinto esicwaningwe ngabacwaningi abaningi. Kodwa-ke ocwaningweni oselwenziwe luncane kakhulu olubheka ukuthi zikhona yini izinsizakufunda ezizokwenza ukufundisa ngalezi zilimi kube yimpumelelo. Ngakho-ke inhloso yalolu cwaningo ukuhlaziya ukuhunyushwa kweNcwadi kaThisha yamaKhono eMpilo... -
Influence of land use and cover on the spatio-temporal analysis of the energy balance in a conservation unit
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Liliane Moreira Nery --- Institute of Science and Technology, Brazil Gabriela Gomes --- Institute of Science and Technology, Brazil Nícholas de Paula Nicomedes --- Institute of Science and Technology, Brazil Bruno Pereira Toniolo --- Institute of Science and Technology, Brazil Raphael de Vicq Ferreira da Costa --- Department of Earth Sciences at the University of Minho, Brazil Darllan Collins da Cunha e Silva --- Institute of Science and Technology, BrazilThis study employs Landsat satellite imagery, interpolated meteorological data and the Surface Energy Balance Algorithm for Land (SEBAL) to estimate the energy balance and evapotranspiration (ET) within the Itupararanga Environmental Protection Area (Itupararanga EPA), located in the Atlantic Forest biome... -
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... -
Polyconvolutions and their applications to Fredholm and Barbashin-type integral equations
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Luís P. Castro --- University of Aveiro, Portugal Nguyen M. Tuan --- VNU University of Education, Viet Nam National University, Viet Nam Trinh Tuan --- Electric Power University, Viet NamThis article introduces a new polyconvolution, which is studied here in the context of Lebesgue spaces with weights (under different possibilities and conditions). This means that we are looking at a convolution as an integral transform. Various properties of the... -
Computational analysis of Orientalist discourse in social media: A case study of Twitter
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Qiming Dong --- Universiti Putra Malaysia, Malaysia Shasha Zhang --- Hunan University of Information Technology, People’s Republic of China Megat Al Imran Yasin --- Universiti Putra Malaysia, Malaysia Chow Ow Wei --- Universiti Putra Malaysia, MalaysiaThe paper presents ORIENT-Net as a tool that processes texts in terms of their orientalist views. This is done by the detection and classification of such texts on social media Twitter. An Orientalist view of the East can see the... -
Reduced Blue Crane Grus paradisea breeding productivity in intensive agricultural landscapes
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Christie A Craig --- FitzPatrick Institute of African Ornithology, Department of Biological Sciences, University of Cape Town, South Africa Bradley K Gibbons --- African Crane Conservation Programme, Endangered Wildlife Trust/International Crane Foundation, South Africa Tanya Smith --- African Crane Conservation Programme, Endangered Wildlife Trust/International Crane Foundation, South Africa Glenn I Ramke --- African Crane Conservation Programme, Endangered Wildlife Trust/International Crane Foundation, South Africa Peter G Ryan --- FitzPatrick Institute of African Ornithology, Department of Biological Sciences, University of Cape Town, South AfricaWe compare Blue Crane Grus paradisea breeding productivity in the Western Cape wheatlands in Overberg and Swartland (2018–2021), Karoo (2009–2011) and eastern grasslands (2009–2011 and 2013). Productivity was higher in the grasslands (0.95 fledglings/attempt, 95% CI = 0.86–1.30, n =... -
The voice of a people: Exploring language and ethnicity among the amaBhaca in uMzimkhulu and KwaBhaca
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Yanga LP Majola --- Tshwane University of Technology Mbombela Campus, South Africa Evangeline B Zungu --- University of Johannesburg, South AfricaAmaBhaca speak isiBhaca and belong to the Nguni language and ethnic group; they are predominantly found in parts of uMzimkhulu, KwaZulu-Natal (KZN), and most parts of KwaBhaca (formerly Mount Frere) in the Eastern Cape (EC) province in modern-day South Africa... -
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... -
Language of instruction and its influence on educational outcomes and cultural inclusion in Ethiopia: A systematic review
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Tamene Deysmi Geremew --- University of Pécs, Hungary Steklács János --- University of Pécs, HungaryModern education in Ethiopia began in 1908, and the curriculum predominantly used both Amharic and foreign languages as media of instruction. In 1994, the Ethiopian Education and Training Policy announced a multilingual educational model for political and pedagogical benefits. Despite... -
A case for a functional retranslation of the Constitution of the Democratic Republic of Congo into Ciluba
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: José Cyunza Kabengela --- Université Pédagogique Nationale (UPN), Democratic Republic of Congo Harold M Lesch --- Stellenbosch University, South AfricaAs the Constitution of the Democratic Republic of the Congo (DRC) is a legal document, it provides every Congolese citizen with information about their rights, privileges and obligations to the state, but also what one can expect from the state... -
Binormal block Toeplitz operators with matrix valued circulant symbols
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Nihat Gökhan Göğüş --- Sabanci University Istanbul, Turkey Rewayat Khan --- Sabanci University Istanbul, Turkey Eungil Ko --- Ewha Womans University, Korea Ji Eun Lee --- Sejong University, Republic of KoreaThis paper focuses on the binormality of block Toeplitz operators with matrix valued circulant symbols. We also study some Γ-dilations of Toeplitz operators. Moreover, we also analyze the invariant subspace of Toeplitz operators with matrix-valued symbols. -
The grazing paradox: assessing contradictions of continuous versus rotational grazing systems in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Katharina Meyer --- Institute of Plant Science and Microbiology, University of Hamburg, Germany Ute Schmiedel --- Institute of Plant Science and Microbiology, University of Hamburg, GermanyUnsustainable grazing practices result in degradation of arid and semiarid rangelands in southern Africa. Continuous grazing systems are often blamed for degradation, while rotational grazing systems are seen as more sustainable. The discussion about the impact of these grazing practices... -
Effects of grazing regimes on ground-dwelling small mammal distribution and abundance in rangelands at Gravelotte, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AW Bio Keri --- The Regional Post-Graduate Training School on Integrated Management of Tropical Forests and Lands (ERAIFT), University of Kinshasa, Democratic Republic of the Congo J De Groot --- Southern African Wildlife College, South Africa PM Hamming --- Southern African Wildlife College, South Africa S Ntie --- Université des Sciences et Techniques de Masuku (USTM), Gabon SGA Nago --- Université de Parakou (UP), Benin EBO Ahouandjinou --- Federal University of Technology, Nigeria AJ Gardiner --- Southern African Wildlife College, South AfricaUnderstanding the impact of grazing on wildlife communities is essential for implementing sustainable grazing practices that promote biodiversity conservation. This study investigated the effects of three grazing regimes (Wildlife and Cattle Grazing, Traditional Rotational Selective Grazing, and Holistic Planned Grazing... -
‘The mountain has a story to tell’: transhumant production systems in the US Intermountain West
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Hailey Wilmer --- USDA-ARS Range Sheep Production Efficiency Research Unit, USA Jonathan Spiess --- USDA-ARS Range Sheep Production Efficiency Research Unit, USA Katherine D White --- Department of Ecosystem Science and Management, University of Wyoming, USA Amira Burns --- USDA-ARS Range Sheep Production Efficiency Research Unit, USA Steven Cox --- Former Dubois Ranger District, Caribou-Targhee National Forest, USA John Derek Scasta --- Laramie Research and Extension Center, Department of Ecosystem Science and Management, University of Wyoming, USA Devan Allen McGranahan --- Livestock and Range Research Laboratory, USDA Agricultural Research Service, USA Carrie S Wilson --- USDA-ARS Range Sheep Production Efficiency Research Unit, USA Will Munger --- USDA-ARS Range Sheep Production Efficiency Research Unit, USA J Bret Taylor --- USDA-ARS Range Sheep Production Efficiency Research Unit, USAGrazing systems research has taken a notable social-ecological turn in response to recent debates, and integrative work is still needed to address gaps in our understanding of multiscalar dynamics in transhumant systems. Transhumance encompasses diverse cultures, ecological relationships, and traditions... -
From data to decisions: the potential of real-time precision technologies to enhance adaptive grazing management for livestock ranchers
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Justin D Derner --- USDA-Agricultural Research Service, Center for Agricultural Resources Research, Rangeland Resources and Systems Research Unit, USA J Gonzalo Irisarri --- University of Wyoming, Department of Ecosystem Science and Management, USA Edward J Raynor --- Colorado State University, AgNext, USA John P Ritten --- Colorado State University, AgNext, USA Clay A Lents --- USDA-Agricultural Research Service, Meat Animal Research Center, Livestock Biosystems Research Unit, USA Kaiyu Guan --- University of Illinois Urbana-Champaign, Agroecosystem Sustainability Center and College of Agricultural, Consumer, and Environmental Sciences, USA Bin Peng --- University of Illinois Urbana-Champaign, Agroecosystem Sustainability Center and College of Agricultural, Consumer, and Environmental Sciences, USA Lexuan Ye --- University of Illinois Urbana-Champaign, Agroecosystem Sustainability Center and College of Agricultural, Consumer, and Environmental Sciences, USA Greg Thoma --- Colorado State University, AgNext, USA Lauren M Porensky --- USDA-Agricultural Research Service, Center for Agricultural Resources Research, Rangeland Resources and Systems Research Unit, USA David J Augustine --- USDA-Agricultural Research Service, Center for Agricultural Resources Research, Rangeland Resources and Systems Research Unit, USAAdvances in on-animal sensors and remote sensing have generated vast data streams, but their impact on rancher decision-making remains limited due to fragmented and uncoordinated efforts. Integration of on-animal monitoring with remote sensing of the grazing resource base offers synergistic... -
Grazing smarter: science-based grazing strategies, not only stocking rate, determine rangeland outcomes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Richard Fynn --- Okavango Research Institute, University of Botswana, Botswana Kevin Kirkman --- School of Agriculture and Science, University of KwaZulu-Natal, South Africa Craig Morris --- School of Agriculture and Science, University of KwaZulu-Natal, South Africa Peter Zacharias --- Consultant in Vegetation/Animal Systems, South AfricaResearch indicates a ‘crisis’ in the search for optimal grazing strategies with experimental results suggesting that stocking rate is the primary factor influencing rangeland condition and cattle performance. However, we contend that this is a spurious conclusion, inevitably conceived by... -
Transhumance within private land conservation areas: perspectives from pastoralist landowners in rural Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Simon M Thiong’o --- Centre for Events, Tourism, and Hospitality Management, Carnegie School of Sport, Leeds Beckett University, Headingley Campus, UKPastoralism in Kenya’s arid and semi-arid regions supports about 10 million indigenous people. While general studies on pastoralist livelihoods exist, limited research explores these dynamics within privately governed landscapes. This study critically examines how land tenure complexities within private land... -
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... -
Life-history traits of the false jacopever Sebastes capensis (Scorpaenidae: Sebastinae) in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Mohamed --- Department of Biological Sciences, University of Cape Town, South Africa CG Attwood --- Department of Biological Sciences, University of Cape Town, South AfricaThe genus Sebastes (rockfishes) of family Scorpaenidae (scorpionfishes) contains over 110 species, of which the false jacopever Sebastes capensis is the only one found in South African waters. Although it is a commonly caught linefish along the west coast of... -
Benthic macrofaunal changes in response to restoration efforts in the St Lucia estuarine lake, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PC Moloi --- School of Agriculture and Science, University of KwaZulu-Natal, South Africa GM Rishworth --- Department of Zoology, Institute for Coastal and Marine Research, Nelson Mandela University, South Africa MS Bird --- Department of Zoology, University of Johannesburg, South Africa NK Carrasco --- School of Agriculture and Science, University of KwaZulu-Natal, South AfricaThe St Lucia estuarine lake and Mfolozi River mouth on the Indian Ocean coast of South Africa were once a single, connected system but were artificially separated in 1952 to prevent siltation from the Mfolozi River catchment which risked shallowing... -
Residency, site affinity and coastal movements of the southern African endemic spotted gully shark Triakis megalopterus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Cottrant --- South African Shark Conservancy, South Africa JH Morrison --- South African Shark Conservancy, South Africa C Elston --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa TS Murray --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa NJ Drobniewska --- South African Shark Conservancy, South Africa LG Underhill --- Department of Biological Sciences, University of Cape Town, South Africa N Hammerschlag --- Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami, United States PS Albano --- Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami, United States ME McCord --- South African Shark Conservancy, South Africa PD Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa C Fallows --- Apex Shark Expeditions, South Africa TG Paulet --- South African Shark Conservancy, South AfricaRising global concern regarding the conservation and management of shark species makes it essential to identify key ecological species to guide conservation efforts, especially species with more restricted distributions such as endemic species. The southern African endemic spotted gully shark... -
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,... -
Distribution and community structure of riverine fish in two east-flowing rivers in Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Japhet Kaadzo Tembo --- Egerton University, Kenya Charles Maina Kihia --- Egerton University, Kenya Nzula Kivuva Kitaka --- Egerton University, Kenya Gordon O’Brien --- School of Biology and Environmental Sciences, University of Mpumalanga, South Africa Emmanuel Mbaru --- , Malaysia Catherine Kariuki --- Egerton University, KenyaThis study investigated the distribution, composition and habitat associations of freshwater eels in the Athi–Galana–Sabaki (Athi) and Ramisi Rivers using fortnightly fyke-net sampling conducted between April 2021 and March 2022. A total of 304 eels were recorded, with the Ramisi...
