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The Influence of Site Factors on the Foliar Nutrient Content of Eucalyptus grandis in Natal
Item type: Journal Article • Journal: South African Forestry Journal • Authors: M.A. Herbert --- Institute for Commercial Forestry Research, South AfricaAlthough foliar analysis is commonly used to diagnose the nutritional status of trees and their ability to respond to fertilising, it is also a measure of site type and quality. The availability of nutrients in the soil varies with climatic... -
Cable Yarding in Southern Africa: An Analysis of its Productivity and Possible Procedure for its Improvement
Item type: Journal Article • Journal: South African Forestry Journal • Authors: R.M. de Laborde --- Institute for Commercial Forestry Research, South AfricaThe demand for timber in southern Africa is increasing and this is resulting in the afforestation of areas which require cable yarding when harvested. The demand for cable yarders, essentially fixed skylines, is therefore increasing rapidly. Stress is being placed... -
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... -
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... -
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... -
Production and quality norms of certain grass species for fodder flow planning: Pretoria area
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.O. Grunow --- Department of Plant Production, J.W. Rabie --- Department of Plant Production,Four subtropical (Cenchrus. Digitaria, Anthephora and Sorghum) and two temperate grass species (Festuca. Agrotricum) were grown in a replicated field experiment at three levels of N application, with adequate P and K. Species were mown at 4‐, 6‐ and 8‐weekly... -
Effect of cutting frequency on the yield and quality of legumes and grasses under irrigation
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J M Van Heerden --- Department of Agriculture and Water Supply (Winter Rainfall Region),Four pasture legumes and seven grasses were subjected to a range of cutting frequencies during the 1980/81 season. A wide range of responses emerged, judged by both the dry matter and TDN yield responses of the different species. Whereas two... -
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... -
Ontogeny of sporobolus fimbriatus tillers in the false thornveld of the Eastern Cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J E Danckwerts --- Department of Agriculture (Eastern Cape Region), A J Aucamp --- Department of Agriculture (Eastern Cape Region), L P Du Toit --- Department of Agriculture (Eastern Cape Region),Marked populations of Sporobolus fimbriatus tillers were sequentially sampled at fortnightly intervals under normal rainfall conditions and under irrigation respectively, covering a period from tiller initiation through to senescence after flowering. Parameters recorded included shoot apex elevation, tiller mass and... -
‘N vergelyking tussen digitaria eriantha steud. subsp. eriantha (smutsvingergras) en eragrostis curvula (schrad.) nees (oulandsgras) as hooigewasse vir skape1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C S Dannhauser --- , W L J Van Rensburg --- , D P J Opperman --- ,Smutsvingergras‐ en oulandsgrashooi is by drie bemestingspeile, naamlik 30 kg N + 2,8 kg P ha‐1; 90 kg N + 8,3 kg P ha‐1 en 150 kg N + 13,8 kg P ha‐1 geproduseer. Die hooi is in alle voorgenoemde... -
Production of pasture species in the winter rainfall region: Simulation of dry matter production
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.M. Vanheerden --- Department of Agriculture & Water Supply (Winter Rainfall Region), N.M. Tainton --- Department of Grassland Science,Production data derived from cutting trials undertaken at a number of sites in the Winter Rainfall Region were used to derive equations for the prediction of the yield of a number of pasture species. Inputs into the models include climatic... -
The effect of continuous and rotational grazing of sourveld on the selection of plant fractions by simmentaler heifers
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: U.P. Kreuter --- Department of Grassland Science, N.M. Tainton --- Department of Grassland Science,In a grazing trial conducted at the Kokstad Agricultural Research Station, the selection of six plant fractions by cattle grazing sourveld was investigated. Relations between the selectivity of the cattle and the dry matter digestibility (DMD) and crude protein (CP)... -
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 comparison of grass and grass/legume pastures under irrigation in the Outeniqua area of the southern Cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.M. van Heerden --- Department of Agriculture & Water Supply (Winter Rainfall Region), Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa P.R. Botha --- Department of Agriculture & Water Supply (Winter Rainfall Region), Republic of South AfricaTwo grass and five grass/legume pastures were evaluated over a period of two seasons at two seasonally set grazing pressures and under two grazing management systems, involving five and seven paddocks per flock and a seven‐day period of stay. Grazing... -
Die evaluering van vier Eragrostis curvula ekotipes met weidende skape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.A. Pieterse --- Departement Plantproduksie, Fakulteit Landbouwetenskappe, Republiek van Suid‐Afrika N.F.G. Rethman --- Departement Plantproduksie, Fakulteit Landbouwetenskappe, Republiek van Suid‐Afrika J.O. Grunow --- Departement Plantproduksie, Fakulteit Landbouwetenskappe, Republiek van Suid‐AfrikaThe evaluation of four Eragrostis curvula ecotypes with grazing sheep. Four ecotypes of Eragrostis curvula, namely, Cape Province 5, Ermelo, Pearston 204 and Makwassie 150 were evaluated in a grazing trial with sheep, at three stocking rates, during two growing... -
Communal land use and the ‘tragedy of the commons’: Some problems and development perspectives with specific reference to semi‐arid regions of southern Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: E.A. Boonzaier --- Department of Social Anthropology, Republic of South Africa M.T. Hoffman --- Department of Botany, Republic of South Africa FionaM. Archer --- Department of Botany, Republic of South Africa A.B. Smith --- Department of Archaeology, Republic of South AfricaTraditional communal farming in southern Africa has often been described as unproductive and directly responsible for regional poverty and vegetation degradation. Each aspect of this argument rests on a set of unchallenged assumptions concerning the nature of communal farming. Studies... -
Changing perceptions of fire management in savanna parks
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M.T. Mentis --- Resource Ecology Group, Department of Botany, Republic of South Africa A.W. Bailey --- Department of Plant Science, CanadaParks are managed to preserve their pristine state. Fire has had a varied role in this, depending on shifting paradigms of savanna functioning. Formerly, an equilibrium theory of functioning prevailed where fire was at first an unavoidable evil, and then... -
Effects of seed treatments on the germination of Atriplex nummularia Lindl.
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.H. Donaldson --- Department of Agriculture (Karoo Region), Republic of South AfricaLaboratory experiments were conducted to determine the influence of length of soaking period and water temperature treatments on the germination of Atriplex nummularia. Germination percentages increased significantly (P≤0,01) with increasing soaking period in water with a temperature of 20°C, while... -
The application of various chemicals to cuts made in the stem bases of Brachystegia spiciformis Benth., Julbernardia globiflora (Benth.) Troupin and Terminalia sericea Burch. ex DC.
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: W.R. Teague --- , Zimbabwe DianeM. Killilea --- , ZimbabwePicloram‐potassium and various mixtures of picloram with 2,4‐D amine, 2,4,5‐T ester or amine, or 2,4,5‐T ester alone were injected into incisions made in the cambium of standing Brachystegia spiciformis and Julbernardia globiflora trees. Each arboricide was tested at a range... -
The application of various picloram formulations to cut stumps of Brachystegia spiciformis Benth., Julbernardia globiflora (Benth.) Troupin, Terminalia sericea Burch. ex DC. and Acacia karroo Hayne trees
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: W.R. Teague --- , Zimbabwe DianeM. Killilea --- , ZimbabweTrees were felled 150 mm above ground level and various mixtures of picloram with 2,4‐D araine, 2,4,5‐T amine in water solution or 2,4,5‐T ester in diesel oil were applied to the freshly‐cut surfaces. Mixtures of picloram/2,4‐D amine and picloram/2,4,5‐T amine,... -
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... -
The incompatibility of controlled selective grazing systems with farmers’ needs
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.H. Düvel --- S.A. Institute for Agricultural Extension, Republic of South Africa H.P.J. Scholtz --- Department of Agricultural Development, Republic of South AfricaSince extension inputs, subsidy schemes and even legislation over several decades were unable to stem the veld deterioration in southern Africa, a renewed attempt was made to identify the causes of the non‐adoption of recommended veld management practices. The hypothesis... -
Relations between woody and herbaceous components and the effects of bush‐clearing in southern African savannas
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: W.R. Teague --- , Republic of South Africa G.N. Smit --- , Republic of South AfricaThe relations between woody and herbaceous plants in southern African savannas are reviewed in the context of pastoral use. Current knowledge is summarized, important gaps are indicated and research priorities are suggested. Although all savannas consist of a grass and... -
Epidemiology of ryegrass mosaic virus in South Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: SarahN. Salm --- , Republic of South Africa M.E. Christine Rey --- Department of Microbiology, Republic of South AfricaThe distribution and seasonal occurrence of ryegrass mosaic virus (RMV) in South Africa was determined. Italian ryegrass plants were collected from eight different research stations twice during the growing season in 1990 and 1991. Samples were tested for the presence... -
Die rol van sekere omgewingsfaktore by alachloraktiwiteit
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Departement Plantproduksie, P.C. Nel --- Departement Plantproduksie,Biotoetse met graansorghum (Sorghum bicolor L.) is in potte in glashuise en groeikabinette uitgevoer. Geselekteerde grond- eienskappe is gekorreleer met alachloraktiwiteit. Organiese materiaalinhoud (% C) was die beste gekorreleerd met die aktiwiteit van alachlor en pH die swakste. Die r-waardes... -
Influence of temperature and daylength on the phenological development of annual Medicago species with particular reference to M. truncatula, cv. Jemalong
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.M. van Heerden --- Department of Agriculture,In a glasshouse and two growth-room trials, carried out in conjunction with 12 serial plantings in pots in the open, it was found that the phenological development of Medicago truncatula, M. tornata, M. aculeata, M. polymorpha, M. scutellata and M... -
Potato irrigation scheduling and straw mulching
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.S. Burgers --- Department of Plant Production, P.C. Nel --- Department of Plant Production,The effect of mulching and irrigation frequency on tuber yield was investigated during three seasons at the Glen Agricultural Research Institute The soil on the experimental site consisted of a loamy sand topsoil and sandy clay subsoil with 94 mm... -
Estimation of minimum temperature on a mesoscale
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Myburgh --- ,Working relationships between mean minimum temperatures and environmental factors by means of regression techniques were established and used to estimate temperatures at gridpoints. These estimated temperatures were then used with a computer package program to map the isotherms on a... -
Influence of sub-optimal imbibition temperatures on seed vigour and respiration in maize (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.A. van de Venter --- , N. Grobbelaar --- ,Germination and coleoptile growth of nine seed lots of maize (representing seven cultivars) were studied at 25°C (constant), 13°C (constant) and also at 7°C (7 days) followed by 25°C. Relative germination response to sub-optimal temperatures reflected relative differences in germination... -
Canopy temperature as a plant water stress indicator for nectarines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Helga Tormann --- ,Three-year-old nectarine trees of the cultivar Independence grown in free-drainage lysimeters were exposed to a wet and a dry treatment, i.e. high soil moisture content throughout or progressive soil drying respectively. The canopy temperature of the trees was measured with... -
In vivo atrazine hydroxylation in maize plants exposed to five different temperature regimes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Malan --- , J.H. Visser --- Department of Botany, H.A. van de Venter --- Department of Botany,Maize plants exposed to atrazine at temperatures ranging from 10°C to 30°C showed increased hydroxylation of atrazine to form the non-toxic hydroxy-atrazine metabolite as temperature increased to 25°C, above which hydroxylation decreased again. When exposed to 12 ppm atrazine, accumulation... -
Water storage, soil temperatures and maize (Zea mays L.) growth for various tillage practices
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. A.J. Berry --- Summer Grain Sub-Centre, Republic of South Africa J.B. Mallett --- Summer Grain Sub-Centre, Republic of South Africa P.L. Greenfield --- Department of Crop Science, Republic of South AfricaFour tillage treatments ranging from conventional mouldboard ploughing through to direct-drilling were repeated during the second season of an ongoing experiment. At commencement of the new season, differences in plant- available water (PAW) in the top 600 mm of the... -
Role of temperature in the activity of acetanilide herbicides on three Phaseolus taxa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E. van Rensburgd --- , Republic of South Africa L.P. van Dyk --- , Republic of South Africa G.H. de Swardt --- , Republic of South AfricaAlachlor [2-chloro-N-(2,6 diethylphenyl)-N-(methoxymethyl) acetamide], metolachlor [2-chloro-N-(2-ethyl-6- methylphenyl)-N-(2-methoxy-1 -methylethyl) acetamide] and acetochlor [2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6- methyl-phenyl) acetamide], members of the chloroacetanilide herbicides, are used pre-emergence to control grasses and some broadleaf weeds. Two concentrations, i.e. 0,5 and 2 mg ai kg−1 of the... -
Relationships between yield, base temperature and drought resistance in grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South AfricaThe object of this study was to investigate the interrelationship between yield, its components, base temperature and drought resistance of grain sorghum. Seven commercial cultivars and 27 F1 progenies were compared in two separate randomized block trials. A total of... -
Measurement of water potential in the trunks of citrus trees using screen-caged thermocouple Psychrometers
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.M. Oosterhuis --- Department of Agronomy, U.S.A. M.J. Savage --- Department of Soil Science and Agrometeorology, Republic of South Africa H.H. Wiebe --- Biology Department, U.S.A.Screen-caged thermocouple Psychrometers were used to non-destructively measure the water potential (ψ) in the trunks of mature citrus trees (Citrus sinensis L. Osbeck), and the values compared with the ψ of covered, exposed, and shaded leaves of the same tree... -
Kaliumvaslegging in 'n Arcadia-grond II. Vaslegging in die kleifraksie
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.J. Steenkamp --- , Republiek van Suid-Afrika A.A. Theron --- Departement Grond- en Waterboukunde, Republiek van Suid-Afrika J.A. de Bruyn --- Departement Botanie, Republiek van Suid-AfrikaOndersoek is ingestel na die invloed van relatief lae toedienings van kalium, asook drogingstemperatuur, op die vermoë van die kleifraksie van 'n Arcadia-grond, versadig met kalsium of magnesium, om kalium vas te lê. Die verskil in reaksie tussen die behandelings... -
Abnormalities of the growth point and ear of barley caused by 2,4-dichlorophenoxy acetic acid
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.W. Loubser --- Department of Agriculture and Water Supply, Republic of South Africa A. L.P. Cairns --- , Republic of South AfricaTreatment of barley plants with 2,4-D, when the main tiller apical meristem was in the late vegetative or double ridge stage, resulted in the production of various abnormalities including missing spikes, branched spikes, whorls of spikelets and paired spikelets instead... -
The effect of removing maize surface residue from the seed-row on seedzone temperature, soil water and maize development
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. A.J. Berry --- Summer Grain Sub-Centre, Republic of South Africa J.B. Mallett --- Summer Grain Sub-Centre, Republic of South AfricaEarly maize development is generally less rapid in the cooler soils of tillage systems which maintain large amounts of crop residues (stubble) on the soil surface. However, soil water storage tends to increase with increasing amount of surface cover, and... -
The influence of temperature and boron on pollen germination in Mangifera indica L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Esmé de Wet --- , Republic of South Africa P.J. Robbertse --- , Republic of South Africa H.T. Groeneveld --- Department of Statistics/Plant Production, Republic of South AfricaFruit set in the mango (Mangifera indica L.) cultivar ‘Haden’ is exceptionally low. In an effort to determine the reason for this phenomenon, the influences of temperature and application of boron on pollen germination and the effectiveness of cross- versus... -
Effect of temperature during the first 42 days following full bloom on apple fruit growth and size at harvest
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O. Bergh --- , Republic of South AfricaThe relationship between temperature prevailing during the 42-day period following full bloom (42 DFFB) and fruit size at harvest of four apple cultivars was studied for two seasons. Lower temperatures during the first season resulted in smaller fruit whereas higher... -
Nitrogen mineralization, nitrification and nitrogen balance in laboratory incubation of soil from natural grassland in the central Orange Free State
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South AfricaAir-dried soil from three layers under grassveld was moistened by the addition of 12 levels of water and incubated for up to two years at five temperatures in screw-capped preserving jars with an air-filled head- space equivalent to seven times... -
Role of temperature and water potential on the activity of some acetanilide herbicides on three Phaseolus taxa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E. van Rensburg --- , Republic of South Africa L.P. van Dyk --- , Republic of South Africa G.H. de Swardt --- , Republic of South AfricaThe effect of three acetanilide herbicides on the hypocotyl-epicotyl growth rate of three Phaseolus taxa was studied at two temperatures and two water potentials. The study proved that, apart from the detrimental effects of the herbicides, low temperature and water... -
A comparison of seed vigour tests for maize (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.A. van de Venter --- , Republic of South Africa H.W. Lock --- , Republic of South AfricaA number of seed vigour tests were conducted on two groups of maize seed lots. One group consisted of six seed lots of different cultivars while the other group consisted of six sub-lots of one cultivar, artificially aged for different... -
Inferences on the threshold temperatures and summation constants in the case of crop development
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.J. van der Merwe --- Department of Mathematical Statistics, Republic of South AfricaThe simplest crop development model assumes a linear relationship between temperature (x) and rate of development (y) and can be written as y = β1 + β2x + €. In crop development models non-linear functions of the parameters β1 and... -
Refinement and validation of the PUTU wheat crop growth model 3. Grain growth
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 submodel for simulating daily grain growth was incorporated in an existing wheat crop growth model. The submodel calculated daily potential grain growth from green leaf area index, plant population and crop stage. Simulated daily potential grain growth was reduced... -
Minimum nagtemperatuur en groeiseisoenlengte van katoenproduserende gebiede in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Dippenaar --- , Republiek van Suid-Afrika J.J. Human --- Departement Agronomie, Republiek van Suid-Afrika'n Bewegende gemiddelde daaglikse minimum nagtemperatuur, T[mbar][nbar] (per vyf dae) is oor 8–15 j vir 23 weer- stasies bereken wat verspreid in die katoenproduserende gebiede van die Republiek van Suid-Afrika aanwesig is. As onderste temperatuurdrempel, of basistemperatuur waarby groei van... -
Effect of temperature on the severity of pre-and post-emergence damping-off and seedling blight of grain sorghum (Sorghum bicolor)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.W. McLaren --- , Republic of South Africa F. H.J. Rijkenberg --- Department of Microbiology and Plant Pathology, Republic of South AfricaThe effect of temperature regimes on seedling diseases of grain sorghum (Sorghum bicolor (L.) Moench), was investigated in growth cabinets and for five planting dates in field trials. The period from planting to seedling emergence was increased by low pre-emergence... -
Infestation and injury levels of stem borers in relation to yield potential of grain sorghum
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 AfricaThe infestation patterns of the stem borer species Busseola fusca (Fuller) and Chilo partellus (Swinhoe) and the effect on plant yield, tiller number, plant height, peduncle length and internal damage were determined under conditions of differential nitrogen fertilization and soil... -
An attempt at estimating solar radiation at South African sites which measure air temperature only
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B. S.E. Clemence --- , Republic of South AfricaDaily potential surface radiation values were calculated for selected South African weather stations. These were used, together with various air temperature parameters, to derive regression equations to estimate actual surface solar radiation at sites lacking the required instrumentation. A single... -
Effect of different day and night temperatures on the diurnal growth rate of terminal and lateral fruits in Golden Delicious apple
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O. Bergh --- , Republic of South Africa DeV. Cloete --- , Republic of South AfricaThe diurnal growth rate of terminal and lateral fruitlets in the same cluster was studied in Golden Delicious under varying night and day temperature conditions In growth chambers as well as in the open. Terminal and lateral fruitlets had a... -
Influence of temperature during the preceding growth period of lucerne on its regrowth at different temperatures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Greenfield --- Department of Agronomy, United States of America Dale Smith --- Department of Agronomy, United States of AmericaOne-year-old lucerne (Medicago sativa L. cv. ‘Vernal’) plants were grown to first flower through three cuttings in three temperature regimes, H (33°C day/24°C night), W (27718°C) and C (21712°C), to ascertain the influence of temperature preceding defoliation on subsequent growth... -
Effect of ridging on the temperature regime of a waterlogged vineyard soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.A. Myburgh --- , Republic of South Africa J.H. Moolman --- Department of Soil and Agricultural Water Science, Republic of South AfricaWaterlogged conditions in hydromorphic soils during spring cause low temperatures which may restrict grapevine performance. Ridging is a soil preparation method that can improve internal drainage in the root zone. Temperature measurements showed that ridging tended to increase temperatures in... -
Long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaSustainable farming in the semi-arid interior of South Africa requires the adoption of conservation practices to maintain and, if possible, increase soil fertility. The effects of some such practices on the nitrogen fertility of a hydromorphic sandy clay loam soil... -
Bepaling van optimale blom en plantdatums vir koring in die sentrale besproeiingsgebiede van die RSA met behulp van 'n groeimodel
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Singels --- Departement Landbouweerkunde, Republiek van Suid-AfrikaOptimale blom- en plantperiodes vir besproeiingskoring is bepaal vir 15 lokaliteite in die sentrale besproeiingsgebiede van die RSA deur gebruik te maak van historiese temperatuurdata en die PUTU koringgroeimodel. Die hoogste gemiddelde opbrengs is gesimuleer met blomperiodes wat oor die... -
Verwantskap tussen organiese materiaalinhoud van sekere onversteurde bogronde, grondeienskappe en klimaatsdata in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. du Toit --- , Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie doel met die ondersoek was om vas te stel of die organiese materiaalinhoud van onversteurde ortiese A-horisonte, wat deur rooi apedale, geelbruin apedale en sagte plintiese B-horisonte onderlê word, vanaf beskikbare of maklik meetbare grondeienskappe en klimaatsdata bereken kan... -
Effects of sample drying temperature on indices of available nitrogen in soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaDuring a field trial investigation into the long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat, it was observed that sample preparation had an effect on some indices of available nitrogen. The trial... -
The effect of oven-drying on residual inorganic nitrogen in soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaResidual ammonium nitrogen in soils which were dried in an oven increased, whereas residual nitrate nitrogen remained almost constant. This observation led to experiments which help to explain the accumulation of ammonium nitrogen in oven-dried soils. It was found that... -
Absence of the 1BL/1RS chromosome translocation in the Kavkaz-derived wheat cultivar Tugela
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Z.A. Pretorius --- Department of Plant Pathology, Republic of South Africa G.F. Marais --- department of Genetics, Republic of South Africa J. Smith --- Small Grain Centre, Republic of South Africa J. le Roux --- Small Grain Centre, Republic of South Africa F.J. Kloppers --- Department of Plant Pathology, Republic of South AfricaThe South African bread wheat (Triticum aestivumL) cultivar Tugela (Kavkaz/Jaral'S') is highly resistant to stem rust caused by Puccinia graminis Pers. f. sp. tritici Eriks. & Henn. Based on pedigree analysis and infection types, it has previously been assumed that... -
Simulation of main stem mature leaf area of maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Singels --- Department of Agrometeorology, Republic of South Africa J.M. de Jager --- Department of Agrometeorology, Republic of South AfricaThe accuracy of different models for simulating the area of mature leaves on the main stem (PLA) of maize using thermal time was investigated. The accuracy of sub-models for simulating the area of individual mature leaves (LAn) and the number... -
The effects of tillage systems on soil bulk density and penetrometer resistance of a sandy clay loam soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.T. Steyn --- Small Grain Centre, Republic of South Africa J. P.C. Tolmay --- Small Grain Centre, Republic of South Africa J.J. Human --- Department of Agronomy, Republic of South Africa W.H. Kilian --- Small Grain Centre, Republic of South AfricaConcern has been expressed that reduced tillage systems may lead to excessive soil compaction, with a negative impact on crop growth. The objectives of this study were to determine the effects of different tillage systems, namely, minimum tillage (disc and... -
Die invloed van grondbewerking op vroeë wortelontwikkeling en biomassa van koringkultivars (Triticum aestivum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.T. Steyn --- , Republiek van Suid-Afrika J. P.C. Tolmay --- , Republiek van Suid-Afrika J.J. Human --- Departement Agronomie, Republiek van Suid-AfrikaDit is bekend dat 'n goeie wortellengte en/of worteldigtheid in die eerste paar weke belangrik is om goeie saailingvestiging te verkry. Die doel van hierdie studie was om die uitwerking van minimumbewerking (wisselgangskotteleg en vlerkskaar), beitelploeg- en konvensionele bewerking op... -
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... -
Soil properties as influenced by cultivation of the aromatic shrub Artemisia afra
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.H. Hansen-Quartey --- Department of Agronomy, Republic of South Africa S.A. Materechera --- School of Agriculture, Republic of South Africa K. Nyamapfene --- , Republic of South AfricaThe herbaceous aromatic shrub African wormwood (Artemisia afra) is thought to be indigenous to the Eastern Cape region of South Africa. In the natural environment, wherever the plant grows, patches of hard, bare ground develop around the plant. To investigate... -
The effect of a diurnal period of supra-optimal temperature on the seed vigour of sunflower
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Nel --- , Republic of South AfricaThe daily maximum temperature in the upper 20 mm of sandy soils is often higher than 45°C on cloudless days during November, December and January in the summer rainfall region of South Africa. At these supra-optimal temperatures, sunflower seedling vigour... -
Fusarium species in wheat grown from head blight infected seed
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. H.P. Boshoff --- Department of Plant Pathology, Republic of South Africa Z.A. Pretorius --- Department of Plant Pathology, Republic of South Africa W.J. Swart --- Department of Plant Pathology, Republic of South AfricaThe objectives of this preliminary study were to identify Fusarium species associated with wheat seed obtained from head blight infected fields and to determine whether the causal organism(s) of head blight could colonise plants systemically from infected seed. Six Fusarium... -
The effect of soil fertility on the contribution of main stem, tillers and kernel position to grain yield and grain protein content of wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.A. Metho --- Department of Plant Production and Soil Science, Republic of South Africa P.S. Hammes --- Department of Plant Production and Soil Science, Republic of South Africa E.A. Beyers --- Department of Plant Production and Soil Science, Republic of South AfricaThe relative contribution of main stems and tillers, as well as the relative contribution of first, second and third kernels in spikeiets to grain yield and grain protein content, is seldom quantified. The grain yield of main stems, tillers and... -
The combining ability of RTx432 for Sorghum malt quality and stem borer resistance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South Africa J. van den Berg --- , Republic of South Africa M. Bloem --- , Republic of South AfricaCombining ability of R-lines with respect to malt quality and stem borer resistance was evaluated in two trials. Crosses between three R-lines and eight R-lines were made for malt quality and three R-lines and seven R-lines for stem borer resistance... -
Long and short term effects of tillage systems on grain yield, the incidence of diseases and production costs for maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.F. Lawrance --- , Republic of South Africa M.A. Prinsloo --- , Republic of South Africa W. A.J. Berry --- , Republic of South AfricaThe effect of four tillage systems on grain yield of maize, incidence of diseases and production costs was investigated for a Hutton soil in the Natal Midlands from 1982 to 1995. The four tillage systems were no-till (NT), reduced tillage... -
Preliminary investigation on the potential of Clivia miniata Regel as a cut flower
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Robbertse --- Department of Plant Production and Soil Science, Republic of South Africa C.B. Honiball --- Department of Plant Production and Soil Science, Republic of South AfricaClivia miniata Regel is widely cultivated as a garden ornamental and a pot plant. It occurs in many attractive shades of orange, red, yellow and pink but little information exists regarding its use as a cut flower. The possibility of... -
Pathotypes of Puccinia graminis f. sp. tritici detected in South Africa during 1991–1997
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. H.P. Boshoff --- , Republic of South Africa B.D. van Niekerk --- , Republic of South Africa Z.A. Pretorius --- Department of Plant Pathology, Republic of South AfricaA stem rust survey is conducted annually in the major bread wheat and triticale producing areas of South Africa to monitor pathogenic variability in Puccinia graminis f. sp. tritici. During 1991 to 1996 the incidence of stem rust on susceptible... -
The harvest index of individual ears of four South African wheat (Triticum aestivum L.) cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.A. Metho --- Department of Agriculture and Environmental Affairs KwaZulu-Natal, Technology Development and Training (FSR), Republic of South Africa P.S. Hammes --- Department of Plant Production and Soil Science, Republic of South AfricaIncreasing the harvest index is a major route to higher yields in regions where a crop has had a lengthy period of selection and adaptation. No information could be found on differences in the harvest indices of the main stems... -
An explanation of genotype by environment interaction for maize in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Laubscher --- , Republic of South Africa C.Z. Roux --- Department of Genetics, Republic of South Africa J. M.P. Geerthsen --- Department of Genetics, Republic of South AfricaThe causes of genotype interaction with the environment was investigated using AMMI (Additive Main Effects and Multiplicative Interaction) analysis. AMMI quantified environments by means of E_IPCA1 (first principal component analysis for environment) such that it was highly significantly correlated (r... -
Use of solid waste bagasse from a paper mill as an organic amendment and its effect on some soil properties: a case study
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.C. Hughes --- Soil Science, South Africa S. J.A. Girdlestone --- Soil Science, South AfricaAt a paper mill in KwaZulu-Natal, South Africa bagasse waste was disposed of by burying it in a layer resulting in variable sugar cane growth. The waste was mostly organic fibres, had a high water holding capacity, and contained small... -
An evaluation of three Sr27-carrying wheat × rye translocations
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.F. Marais --- Department of Genetics, Republic of South AfricaNear isogenic lines differing for the presence or absence of group 3 wheat x rye translocations were developed in three wheat varieties. These included a non-compensating 3AS.3RS translocation and two compensating translocations with constitutions 3AL.3RS and 3BL.3RS. Results of a... -
Changes in chemical properties and temperature during the degradation of organic wastes subjected to simple composting protocols suitable for small-scale farming, and quality of the mature compost
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.C. Smith --- , South Africa J.C. Hughes --- , South AfricaDespite the high cost of chemical fertilizers and pesticides, composting is not widely practiced in many rural communities in South Africa. To demonstrate the simplicity and benefit of composting, four composting protocols were selected, based on technology and resources available... -
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... -
Effect of leaf-section position and physiological stage of the donor plant on Lachenalia leaf-cutting performance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.M. Ndou --- , South Africa J.G. Niederwieser --- , South Africa P.J. Robbertse --- Department of Plant Production and Soil Science, South AfricaThe effect of leaf-section position and physiological stage of the donor plant on leaf cutting performance was determined on three Lachenalia cultivars, viz ‘Romelia’, ‘Rupert’ and ‘Robyn’. Performance was evaluated in terms of leaf cutting survival, number of bulblets formed,... -
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... -
Optimum temperature and inoculation levels for in vitro production of Pratylenchus brachyurus on carrot discs
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H. Fourie --- , South Africa G.A. Venter --- , South Africa A.H. Mc Donald --- , South AfricaPratylenchus brachyurus is an economically important parasite of several agricultural crops, including potato, groundnut, maize and soybean. Large numbers of this species are required for research on pathogenecity, host plant resistance and efficacy of nematicides. The effect of inoculation density... -
Inheritance of resistance in maize to the African stalk borer, Busseola fusca (Fuller) (Lepidoptera: Noctuidae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.M. André --- Department of Plant Breeding, South Africa J. B.J. van Rensburg --- , South Africa M.T. Labuschagne --- Department of Plant Breeding, South AfricaThe inheritance of resistance to the African stem borer, Busseola fusca, in maize was investigated by means of line x tester analyses in the F1 to F4 generations of crosses between 18 susceptible inbred lines and two resistant testers of... -
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... -
An investigation into soil fertility in two resource-poor farming communities in KwaZulu-Natal (South Africa)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: V.G. Roberts --- KwaZulu-Natal Dept. of Agriculture and Environmental Affairs, Republic of South Africa S. Adey --- , Republic of South Africa A.D. Manson --- KwaZulu-Natal Dept. of Agriculture and Environmental Affairs, Republic of South AfricaLow soil fertility is one of the major constraints affecting agriculture in Africa, a phenomenon that is also evident in fields of resource-poor farmers in KwaZulu-Natal. However, nutrient depletion status is field specific. This paper investigates the hypothesis that among... -
Effect of temperature on the germination of grain Amaranth
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T.A. Loonat --- Department of Agriculture, Conservation, Environment and Land Affairs (Gauteng), South Africa E. van den Heever --- , South Africa P. Hammes --- Department of Plant Production and Soil Science, South AfricaAmaranthus cultivation in South Africa has potential commercial importance. To make optimal use of the growing season planting under cool soil conditions is often necessary. The effect of temperature on seed germination of A. hypochondriaeus (unknown landrace) and A. cruentus,... -
Germination strategies of Strandveld Succulent Karoo plant species for revegetation purposes: III Effect of relative humidity and storage site on seed viability
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.J. de Villiers --- Department of Botany, Republic of South Africa M.W. van Rooyen --- Department of Botany, Republic of South Africa G.K. Theron --- Department of Botany, Republic of South AfricaChanges in seed viability owing to fluctuations in environmental conditions (temperature and relative humidity) are crucial factors to consider during post-mining revegetation efforts in the Strandveld Succulent Karoo. The effect of relative humidity and storage site on seed viability was... -
The characterization of Pythium group G occurring on kenaf in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.T. Tesfaendrias --- Department of Plant Sciences, South Africa W.J. Swart --- Department of Plant Sciences, South Africa W. Botha --- , South AfricaKenaf provides a source of high quality cellulose fibers and its cultivation is being investigated in South Africa with a view to commercial production. In March 2001, kenaf plants in experimental plots near Bloemfontein, South Africa, developed large, black sunken... -
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... -
Effect of temperature, soil moisture content and type of cutting on establishment of sweet potato cuttings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. Belehu --- Department of Plant Production and Soil Science, Republic of South Africa P.S. Hammes --- Department of Plant Production and Soil Science, Republic of South AfricaEffective rooting is essential for successful crop establishment from cuttings. The objective of this study was to determine the effect of temperature and soil water content on the root and shoot growth during the early establishment of sweet potato cuttings... -
Suitability of two types of plastic covering on mini-tunnels for paprika seedling production in warm areas
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Allemann --- , Republic of South Africa J. Viljoen --- , Republic of South Africa J.G. Niederwieser --- , Republic of South AfricaA trial was conducted at the ARC-Roodeplaat Vegetable and Ornamental Plant Institute to determine the difference between the two types of plastic (clear and opaque) used as covering for mini-tunnels during paprika (Capsicum anuum L.) seedling production. Two cultivars (PapriKing... -
Temporal and spatial relations of plant element uptake and yield of a lucerne stand
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Venter --- Department of Plant Production and Soil Science, South Africa D.J. Beukes --- , South Africa A.S. Claassens --- Department of Plant Production and Soil Science, South Africa M. Van Meirvenne --- Dept. Soil Management and Soil Care, BelgiumIn general, agricultural fields are managed as uniform units, ignoring spatial and temporal relations between plant element uptake and yield. This study was conducted from June 2001 to February 2002 on a two-year-old lucerne stand and explores the spatial relationships... -
The effect of temperature on the germination of six selected weed species
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MarthaM. Manoto --- Department of Agriculture: Western Cape, Republic of South Africa MI. Ferreira --- Department of Agriculture: Western Cape, Republic of South Africa GA Agenbag --- Department of Agronomy, Republic of South AfricaField-collected seeds were incubated in a germination cabinet at three temperature regimes and germination percentage was determined after incubation. Species such as Arctotheca calendula, Avena fatua, Bromus diandrus and Raphanus raphanistrum germinated best when subjected to a diurnal temperature regime... -
Influence of harvest maturity on quality of cold stored Vitis vinifera L. cv. ‘Thompson Seedless’ and ‘Red Globe’ table grapes, with special reference to berry split
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.A. Burger --- , South Africa M.A. Taylor --- , South Africa G. Jacobs --- Department of Horticultural Science, South Africa M. Huysamer --- Department of Horticultural Science, South AfricaEffect of harvest maturity on quality of Thompson Seedless' and ‘Red Globe’ table grapes after cold storage at −0.5°C and a subsequent shelf life was investigated. Berry split decreased significantly for grapes harvested at more advanced maturities. By harvesting ‘Thompson... -
High-density orchards improve the quality of ‘Songold’ plums from lower, more shaded canopy positions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. Kruger --- Department of Horticultural Science, South Africa D.M. Holcroft --- Department of Horticultural Science, South Africa M. Huysamer --- Department of Horticultural Science, South Africa N.C. Cook --- Department of Horticultural Science, South AfricaGel breakdown is a major postharvest problem in ‘Songold’ plums (Prunus salicina Lindl.) that is exacerbated in fruit harvested from lower canopy positions in large trees. Modern high-density orchards with small trees aggressively address this problem through improved light distribution... -
Effects of Artemisia afra leaf extracts on seed germination of selected crop and weed species
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. Ammann --- Department of Agronomy, Republic of South Africa P.J. Pieterse --- Department of Agronomy, Republic of South AfricaHerbicide resistance in weeds is a phenomenon threatening sustainable cereal production in the winter rainfall region of South Africa. Every possible weed control measure that may be used to complement chemical weed control measures should be investigated. The effect of... -
Variation of agronomic traits of potato somaclones produced by meristem culture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Viive Rosenberg --- Plant Biotechnological Research Centre EVIKA Saku, Estonia Marje Särekanno --- Plant Biotechnological Research Centre EVIKA Saku, Estonia Katrin Kotkas --- Plant Biotechnological Research Centre EVIKA Saku, Estonia Virge Vasar --- Plant Biotechnological Research Centre EVIKA Saku, Estonia Ann Ojarand --- Plant Biotechnological Research Centre EVIKA Saku, EstoniaFollowing a thermotherapy virus eradication procedure potato plantlets were multiplied as meristem clones in vitro. The agronomic traits of meristem clones were compared in field trials over three years. A total of 16 meristem clones of cultivar Agric dzeltenie and... -
First report of field resistance by the stem borer, Busseola fusca (Fuller) to Bt-transgenic maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- , South AfricaReports of severe damage caused by the African stem borer, Busseola fusca (Fuller) to Mon810-transgenic maize (Bt) prompted a study in which the survival of progenies of diapause larvae collected from both a Bt and non-Bt planting were compared when... -
The relative abundance of maize stem borers and their parasitoids at the Tshiombo irrigation scheme in Venda, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. Krüger --- , South Africa J. van den Berg --- , South Africa H. van Hamburg --- , South AfricaMaize is an important resource in many small-scale farming areas in South Africa and especially on irrigation schemes in the Limpopo Province where this crop is cultivated under irrigation in sub-tropical conditions. The aim of this study was to determine... -
A review of advances in hydropedology for application in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.W. van Huyssteen --- , South AfricaHydropedology is internationally a new and fast-growing science. It is therefore pertinent to take heed of developments in this regard to guide current and future research in South Africa. This paper aims to discuss the initiation and advances in the... -
Citrus tristeza virus cross-protection of ‘Palmer’ navel orange in the Eastern Cape Province of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.P. van Vuuren --- , J.G.J. Maritz --- , N. Combrink --- ,Citrus tristeza virus (CTV) is endemic in southern Africa due to the abundance of the citrus brown aphid, To x -optera citricida Kirk., the main insect vector. Virus-free propagation material in the Southern African Citrus Improvement Scheme is pre-inoculated with... -
The effect of the adjuvant, Break-Thru S240, on whorl penetration and efficacy of foliar insecticide applications against Chilo partellus
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O. Slabbert --- , South Africa J. Van den Berg --- , South AfricaInsecticide sprays registered for the control of maize stem borers are all intended for whorl application. Chemical control of these pests is complicated by their cryptic feeding habit inside plant whorls. The aim of this study was to investigate whether... -
Advances in sugarcane soil fertility research in Southern Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.H. Meyer --- , R. van Antwerpen --- ,The South African sugar industry is a modern, well organised industry and highly cost-competitive in world terms, producing some 2.3 million tons of sugar annually from 20 million tons of cane. The bulk of the cane is produced by some... -
Comparative performance of tomato cultivars cultivated in two hydroponic production systems
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Maboko --- , South Africa C.P. Du Plooy --- , South Africa I. Bertling --- ,Cultivar selection for different hydroponic production systems is an important management decision, potentially impacting the tomato grower’s profitability. Knowledge on the performance of tomato cultivars, in specific hydroponic systems (open-bag and closed system) under South African conditions, is still very... -
Growth, yield and grain protein content of wheat (Triticum aestivum L.) in response to nitrogen fertiliser rates, crop rotation and soil tillage
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: GA Agenbag --- Department of Agronomy, South AfricaSoil tillage affects both the profitability and sustainability of cropping systems. Minimum- and no-tillage systems are promoted because research has shown that these systems may reduce production costs and improve biological sustainability when compared to conventional systems, in which mouldboard... -
Estimation of frost occurrence and duration of frost for a short-grass surface
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MJ Savage --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South AfricaThe estimation of frost duration (FD) was investigated using dielectric, infrared surface temperature and grass temperature subhourly measurements. Near real-time FD data and information displays and alerts were also made available via a web-based system. FD was estimated using a... -
Estimation of leaf wetness duration for a short-grass surface
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MJ Savage --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, South AfricaThe measurement of leaf wetness duration (LWD) was investigated using subhourly dielectric, infrared surface temperature, dewpoint temperature, grass temperature and relative humidity (RH) measurements. Near real-time LWD data and information displays and alerts were made available timeously via a web-based... -
Effects of storage conditions on transpiration rate of pomegranate aril-sacs and arils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Wilhelmina V Aindongo --- Department of Food Science, Faculty of AgriSciences, South Africa Oluwafemi J Caleb --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Faculty of AgriSciences, South Africa Pramod V Mahajan --- Department of Horticultural Engineering, Germany Marena Manley --- Department of Food Science, Faculty of AgriSciences, South Africa Umezuruike L Opara --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Faculty of AgriSciences, South AfricaThis study investigated the effects of temperature (5, 10, 15 and 22 °C) and relative humidity (RH) (76%, 86% and 96%) on the transpiration rate (TR) of pomegranate (Punica granatum L.) cv. Bhagwa fruit fractions, namely arils and aril-sac. Both... -
Web-based teaching, learning and research using accessible real-time data obtained from field-based agrometeorological measurement systems
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael J Savage --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South Africa Michael G Abraha --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South Africa Nicholas C Moyo --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South Africa Nile Babikir --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South AfricaTo enhance teaching and learning in agrometeorology and allied disciplines, a Web-based data and information system was developed. The system uses field-based agrometeorologcial measurements, from automatic weather, radiation and temperature stations, to collect and display near real-time and previous data... -
Identification and classification of vertical chlorophyll patterns in the Benguela upwelling system and Angola-Benguela front using an artificial neural network
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: N. F. Silulwane A. J. Richardson F. A. Shillington B. A. Mitchell-InnesInformation on the vertical chlorophyll structure in the ocean is important for estimating integrated chlorophyll a and primary production from satellite. For this study, vertical chlorophyll profiles from the Benguela upwelling system and the Angola-Benguela front were collected in winter... -
An assessment of the recreational fishery in the St Lucia estuarine system, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: B. Q. Mann N. C. James L. E. BeckleySt Lucia is one of the largest estuarine systems in Africa, and attracts thousands of anglers each year. Catchcard data from the National Marine Linefish System for the years 1986–1999 were analysed to determine catch composition, catch per unit effort... -
A new species of threadsnake in the genus Myriopholis (Squamata: Scolecophidia: Leptotyplophidae) from southeastern Kenya
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Patrick K. Malonza --- National Museums of Kenya, KenyaA new threadsnake species from the family Leptotyphlopidae, Myriopholis mackayi sp. nov., is described from the Tsavo area in southeastern Kenya. Myriopholis mackayi sp. nov. is a member of the Myriopholis longicauda group on the basis of having a low... -
The influence of site, season and day of the week on exploitation of rocky intertidal biota in central Transkei, South Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: V. N. Majiza T. A. LasiakTemporal and spatial variations in the pattern and intensity of exploitative use of rocky shores in the densely populated central Transkei region of the south-east coast of South Africa are described. Surveys of intertidal exploiters and their catches were conducted... -
How can Human Beings Transgress their Biologically Based Views?
Item type: Journal Article • Journal: South African Journal of Philosophy • Authors: Michael Vlerick --- Department of philosophy, South-AfricaEmpirical evidence from developmental psychology and anthropology points out that the human mind is predisposed to conceptualize the world in particular, species-specific ways. These cognitive predispositions lead to universal human commonsense views, often referred to as folk theories. Nevertheless, humans... -
THE EFFECT OF TEMPERATURE ON SPECIFIC GROWTH RATE AND ACTIVATION ENERGY OF MICROCYSTIS AND SYNECHOCOCCUS ISOLATES RELEVANT TO THE ONSET OF NATURAL BLOOMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: G. H.J. Krüger --- Department of Botany, South Africa J.N. Eloff --- Department of Botany, South AfricaTo investigate the correlation between temperature and the appearance of Microcystis blooms in nature, the effect of temperature on the growth of four Microcystis izolates (two toxic and two non-toxic) was investigated. The lower temperature limit for Microcystis varied between... -
VIABLE HETEROTROPHIC BACTERIAL POPULATION STRUCTURE OF A TURBID MAN-MADE IMPOUNDMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.F. Toerien --- , Republic of South Africa D.N. Sadie --- , Republic of South Africa H. J.J. van Vuuren --- Department of Microbiology, Republic of South Africa R.P. Tracey --- Department of Microbiology, Republic of South AfricaSeventy one heterotrophic bacterial isolates were obtained from Wuras Dam, phenotypically characterized and clustered with the unweighted-pair group method. Three groups were obtained of which the first contained 59 members in several clusters. Overall this group was characterized by a... -
EARLY OBSERVATIONS ON SOME LIMNOLOGICAL CHARACTERISTICS OF THREE ORANGE FREE STATE IMPOUNDMENTS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.U. Grobbelaar --- , South AfricaThe first limnological investigations on three impoundments in the Orange Free State are described. No thermal stratification was found and water temperatures below 8,6°C were not measured. The waters were turbid and the unfavourable underwater light climate was the major... -
A COMPARISON OF MULTIPLE CONTAINER AND TUBULAR SYSTEMS FOR THE LARGE SCALE LABORATORY CULTURE OF UNICELLULAR ALGAE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.N. Eloff --- Botany Department, South Africa G. H.J. Krüger --- Botany Department, South Africa A.J. van der Westhuizen --- Botany Department, South AfricaIt is pointed out that due to its construction a tubular system has many advantages, compared to a multiple container system. The most important being the ease of manipulation and the higher yield of algal material. The tubular system has... -
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... -
THE TEMPERATURE-GROWTH RATE RELATIONSHIPS OF AEROBIC HETEROTROPHIC BACTERIA ISOLATED FROM A SILT-LADEN IMPOUNDMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.F. Toerien --- , South AfricaThe temperature-growth rate responses of bacterial isolates from Wuras Darn, a silt-laden, highly turbid impoundment were described well by Arrhenius equations. Activation energies varied from 10, 15 to 29, 59 kcal moles−1, indicating a varied response to temperature changes. Since... -
PREDICTION OF SURFACE WATER TEMPERATURE OF SOUTH AFRICAN IMPOUNDMENTS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.J. van Schalkwyk --- Department of Mathematical Statistics, Republic of South Africa R.D. Walmsley --- Department of Plant Schiences, Republic of South AfricaTemperature data for 18 South African impoundments were evaluated against Straskraba's global surface water predictive model. All impoundments exhibited quantifiable sinusoidal annual temperature variations which allowed for good predictive capabilities using Straskraba's empirical approach. For each impoundment coefficients for input... -
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... -
A PRELIMINARY ASSESSMENT OF THE IMPACT OF SOME ASPECTS OF THE HARTBEESPOORT DAM ENVIRONMENT ON PRODUCTION OF THE MAJOR FISH SPECIES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K.L. Cochrane --- , South AfricaThe dominant species of fish in Hartbeespoort Dam, in terms of mass composition of catches, are shown to be Oreochromis mossambicus (Peters), Cyprinus carpio Linnaeus and Clarias gariepinus Burchell. Minimum winter temperatures are demonstrated to have a major impact on... -
EFFECT OF PROGRAMMED CIRCADIAN TEMPERATURE FLUCTUATIONS ON POPULATION DYNAMICS OF BULINUS TROPICUS (KRAUSS) AND LYMNAEA NATALENSIS KRAUSS (GASTROPODA: MOLLUSCA)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K.N. de Kock --- Department of Zoology, South AfricaUntil now all life-table studies on Bulinus tropicus (Krauss) and Lymnaea natalensis Krauss involving temperature as the variable factor have been conducted at constant temperatures. This study evaluates the effect of programmed, circadian temperature fluctuations, ranging from 18 to 28... -
THE EFFECT OF CONSTANT TEMPERATURES ON THE HATCHING OF EGGS AND SURVIVAL OF THE FRESHWATER SNAIL BIOMPHALARIA GLABRATA (SAY)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P.H. Joubert --- South African Medical Research Council and Department of Zoology, South Africa S.J. Pretorius --- South African Medical Research Council and Department of Zoology, South AfricaThe incubation period and percentage hatching of eggs of pigmented and unpigmented Biomphalaria glabrata at constant temperatures were investigated in the range 14 °C to 34 °C. In order to determine the influence of extreme temperatures on adult snails, specimens... -
EFFECT OF CONSTANT TEMPERATURE ON POPULATION DYNAMICS OF BULINUS TROPICUS (KRAUSS) AND LYMNAEA NATALENSIS KRAUSS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K.N. de Kock --- Snail Research Unit of the South African Medical Resesrch Council, South Africa J.A. van Eeden --- Snail Research Unit of the South African Medical Resesrch Council, South AfricaLife-tables were compiled for cohorts of the two freshwater snail species Bulinus tropicus (Krauss) and Lymnaea natalensis Krauss at six different constant temperatures from 17 to 32 °C under identical conditions of crowding, feeding and chemical composition of the water... -
NUTRIENTS AND THE PRODUCTIVITY OF ESTUARINE AND COASTAL MARINE ECOSYSTEMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: S.W. Nixon --- Marine Ecosystems Research Laboratory, United States of America C.A. Oviatt --- Marine Ecosystems Research Laboratory, United States of America J. Frithsen --- Marine Ecosystems Research Laboratory, United States of America B. Sullivan --- Marine Ecosystems Research Laboratory, United States of AmericaRecent research on estuarine and coastal marine systems has revealed two particularly interesting things about nutrients and productivity. First is the observation that these areas are among the most intensively fertilized environments on earth. Second is the common finding that... -
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... -
A RULE-BASED ECOSYSTEM MODEL FOR THE MANAGEMENT OF LAKE ST LUCIA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R.H. Taylor --- Natal Parks Board, South Africa B.P. Farm --- Dept. of Ecology and Behavioural Biology, United States of America A.M. Starfield --- Dept. of Ecology and Behavioural Biology, United States of AmericaLand transformations in the catchments of Lake St Lucia have altered the hydrology of the system and increased management is now needed to counteract these changes. There are several management options available, but prior to implementing them we must be... -
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... -
OBSERVATIONS ON THE DISTRIBUTION, EMERGENCE AND BEHAVIOUR OF CENTRAL AFRICAN CHAOBORIDAE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: SA Mitchell --- Unit for Limnology, South AfricaThe distribution of four species of Chaoboras over selected parts of Zimbabwe is given. The effect of temperature on the duration of the larval life cycle is discussed in relation to the generation time and the lunar periodicity of the... -
OBSERVATIONS ON THE COEXISTENCE OF FRESH AND SALTWATER INVERTEBRATES IN AN INLAND SALTWORKS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: S.A. Mitchell --- Unit for Limnology, South Africa M.T. Seaman --- Unit for Limnology, South AfricaThe fauna of three excavated trenches in the floor of the dry salt-pan in the Brandfort district of the Orange Free State was investigated. Two were found to contain typical saline water invertebrate fauna such as Artemia sp. and the... -
TWENTY-FIVE YEARS OF TRICHOPTERA RESEARCH RELATING TO SOUTHERN AFRICA - A PERSONAL VIEW
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K. M.F. Scott --- , South AfricaA brief account of earlier work on Trichoptera, reasons for choice of the Order, and resources built up, is followed by the story of twenty-five years of research, from 1963–1988. This includes aims in view, followed by the ‘state of... -
DEEP SEA, ESTUARINE AND FRESHWATER FISHES: LIFE HISTORY STRATEGIES AND ECOLOGICAL BOUNDARIES
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: S. J.M. Blaber --- Division of Fisheries, AustraliaThe life histories of fishes from three different ecosystems are compared and discussed with emphasis on species that move between habitats: between estuary and sea in tropical northern Australia; between bottom waters and pelagic waters of the temperate continental slope... -
THE BENTHIC MACROINVERTEBRATE FAUNA OF A SOUTH AFRICAN MOUNTAIN STREAM AND ITS RESPONSE TO FIRE
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: D.L. Britton --- Freshwater Research Unit, Zoology Department, South AfricaThe effects of a late-summer prescribed burn on the temperature and benthic macroinvertebrate fauna of a south-western Cape mountain stream were investigated over a period of 12 months. Temperature and discharge regimes appear well-defined and relatively predictable from year to... -
SHORT-TERM IMPACTS OF FORMULATIONS OF BACILLUS THURINGIENSIS VAR. ISRAELENSIS DE BARJAC AND THE ORGANOPHOSPHATE TEMEPHOS, USED IN BLACKFLY (DIPTERA: SIMULIIDAE) CONTROL, ON RHEOPHILIC BENTHIC MACROINVERTEBRATES IN THE MIDDLE ORANGE RIVER, SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R.W. Palmer --- Department of Water Affairs and Forestry, South AfricaThe impacts of larvicides used in the control of blackflies (Diptera: Simuliidae) on macroinvertebrates in the stones-in-current biotope were assessed during 8 field trials in the middle Orange River, South Africa. Two Bacillus thuringiensis var. israelensis (B.t.i.) products (VectobacR 12AS... -
COASTAL AQUATIC ECOSYSTEMS, CONSERVATION AND MANAGEMENT STRATEGIES IN NIGERIA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: E.A. Ajao --- , NigeriaThe coastal ecosystems in Nigeria are classified into four broad regions according to differences in general morphology, vegetation and beach type. They are the barrier lagoon complex, the transgressive mud beach, the Niger delta and the strand coast. The delta... -
THE EFFECTS OF TROUT-FARM EFFLUENTS ON BENTHIC INVERTEBRATE COMMUNITY STRUCTURE IN RIVERS IN THE SOUTH-WESTERN CAPE, SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: C.A. Brown --- Freshwater Research Unit, Zoology Department, J.M. King --- Freshwater Research Unit, Zoology Department,The south-western Cape is currently responsible for 45% of the total annual trout production in South Africa and further expansion of this industry in the region is likely. A preliminary survey of seven trout farms situated on the upper reaches... -
MASS MORTALITIES OF FISH IN SOUTH AFRICAN ESTUARIES
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: A.K. Whitfield --- , South AfricaChanges to the physico-chemical environment have been identified as the cause of fish mass mortalities in South African estuaries. Most published accounts have linked these mortalities to a single dominant factor such as low salinity, low or high temperature, low... -
IMPACTS OF REPEATED APPLICATIONS OF BACILLUS THURINGIENSIS VAR. ISRAELENSIS DE BARJAC AND TEMEPHOS, USED IN BLACKFLY (DIPTERA: SIMULIIDAE) CONTROL, ON MACROINVERTEBRATES IN THE MIDDLE ORANGE RIVER, SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R.W. Palmer --- Department of Water Affairs and Forestry, South Africa A.R. Palmer --- , South AfricaThe impacts of five consecutive treatments of blackfly larvicides on macroinvertebrates in the middle Orange River were assessed. The abundance of the midge Xenochironomus sp. and the limpet Burnupia sp. was lower at sites treated with Bacillus thuringiensis var. israelensis... -
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... -
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... -
WATER TEMPERATURE AND THE 1987 FISH KILL AT LAKE ST LUCIA ON THE SOUTH EASTERN COAST OF AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: D.P. Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South Africa S. McLean --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaAn unusually cold spell during the winter of 1987 caused a drop in water temperature at Lake St Lucia. This coupled with typical estuarine salinities in the lake resulted in a fish kill. The kill was one of the largest... -
A COMPARISON OF THE FOOD SOURCES OF STONEFLIES (PLECOPTERA) FROM AN OPEN-AND A CLOSED-CANOPY HEADWATER STREAM IN SOUTH AFRICA USING STABLE-ISOTOPE TECHNIQUES
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: E. Reynolds --- , , South Africa C. de Villiers --- , , B. R. Davies --- , , South AfricaThe effects of different local food resources on the diets of some filipalpian stonefly nymphs (Aphanicerca spp.) were investigated. Animals from two headwater reaches, one primarily allochthonously driven and the other an open-canopied autochthonous-based system were compared. However, gut and... -
A PRELIMINARY EVALUATION OF ASPECTS OF SASS (SOUTH AFRICAN SCORING SYSTEM) FOR THE RAPID BIOASSESSMENT OF WATER QUALITY IN RIVERS, WITH PARTICULAR REFERENCE TO THE INCORPORATION OF SASS IN A NATIONAL BIOMONITORING PROGRAMME
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: H. F. Dallas --- , , South AfricaThe rapid bioassessment method, SASS (South African Scoring System) has been developed to assess water quality in riverine ecosystems. It is a scoring system based on the presence or absence of macroinvertebrate groups, and yields three values, namely SASS4 Score,... -
VARIABILITY IN THE INVERTEBRATE FAUNA OF AN INTERMITTENT STREAM OVER THREE CONSECUTIVE MIDSUMMER PERIODS
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: M. C. Uys --- , South Africa J. H. O'Keeffe --- , South AfricaNon-perennial rivers in semi-arid regions are exposed to unpredictable and highly variable rainfall and hydrology which can have considerable effects on faunal organisation at different scales. Spatial and temporal dynamics in the aquatic invertebrate fauna of an aseasonal intermittent river... -
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... -
Fire and the dynamics of a semi-arid grassland: influence on soil characteristics
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: H A SnymanThe short-term impact of fire burning with the wind (head fire) and against the wind (back fire) on soil characteristics (soil-water content, soil compaction, soil temperature, organic matter, pH, exchangeable Ca, Mg, K, Na and extractable P) were determined in... -
Seasonal chemical composition of wall barley (Hodreum murinum L.) under sub-humid Mediterranean climate
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Moh'd KhairJ El-Shatnawi LouyZ Al-QurranWall barley (Hodreum murinum L.) is an annual cool-season grass species that grows in areas with a Mediterranean climate. It has potential as a forage source in Jordan. The objective was to determine seasonal chemical composition of wall barley grown... -
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... -
Monitoring in a complex world — seeking slow variables, a scaled focus, and speedier learning
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T.J.P. Lynam M. Stafford SmithRecent developments from complex systems theorists provide new insights into our understanding and, hence, monitoring of rangelands. Designing monitoring systems around the slow variables should lead to the generation of information that could greatly improve decision making in an adaptive... -
Rangeland assessment and monitoring: the elusive elixir
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.J.K. Zacharias'Classical' rangeland monitoring is discussed in the context of its fitness-for-purpose. The theoretical or descriptive models that underpin global approaches are considered and reviewed. The needs and types of measurements are discussed as are developments in southern Africa over three... -
Lines around fragments: effects of fencing on large herbivores
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: RandallB Boone N Thompson HobbsPeople construct fences to delineate land ownership and to control access to land. Fences accomplish several purposes, notable among these are containing livestock or wildlife raised for profit or subsistence, excluding use of vegetation within areas to be conserved and... -
The Ellis paradigm — humans, herbivores and rangeland systems
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Michael CoughenourThe scientific and conceptual contributions Jim Ellis made throughout the course of his career reveal a logical progression towards increased understanding of pastoral ecosystems worldwide. Research in wildlife, large herbivores, systems ecology and energy flows through grazing ecosystems formed the... -
Short-term response of burnt grassland to defoliation in a semi-arid climate of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: HA SnymanThe impact of defoliation on the productivity and soil temperature of burnt grassland (head and back fires) was investigated over the short term (one and two growing seasons after burning). Head fires had greater flame height and rate of spread... -
The effect of defoliation during wilting on the production of Themeda triandra and Eragrostis lehmanniana in semi‐arid grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: H.A. Snyman --- Department of Pasture Science, Republic of South AfricaThe effect of defoliation during wilting on the production of Themeda triandra and Eragrostis lehmanniana was studied over four years (1977 to 1980). Defoliation whilst the plants were at temporary wilting point in the early growing season (before 1 January)... -
Perspective: Towards improved grazing management recommendations for sourveld
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: K.P. Kirkman --- , Republic of South Africa A. Moore --- , Republic of South AfricaCritical evaluation of grazing management recommendations for sourveld revealed scientific, economic and practical deficiencies. These recommendations are seldom adopted. Recent scientific evidence has facilitated the adoption of certain principles in new practical, economically viable recommendations aimed at maintaining or improving... -
Long‐term effects of different rotational grazing schedules on the productivity and floristic composition of Tall Grassveld in KwaZulu‐Natal
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C.D. Morris --- Department of Grassland Science, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaNine simulated rotational grazing systems, comprising combinations of three different periods of occupation (2, 10 and 20 days) and three periods of absence (20, 40 and 60 days), were applied to Tall Grassveld for 24 years (1967–1991), using sheep. All... -
Perspective: Animal‐vegetation relations which optimise production, utilisation and protection of natural resources: An African experience
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T. Nolan --- , IrelandThe broad objective is to improve the standard of living of farmers/herders through identification of complementary vegetation‐use under mixed animal species grazing. This paper aims to (1) review mixed‐grazing research and development carried out in Ireland and in the semi‐arid... -
Community dynamics and phytomass of herbaceous species in the Sudaniansavanna-woodlands of Burkina Faso: short-term impact of burning season
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SD Dayamba --- Tropical Silviculture and Seed Laboratory, Southern Swedish Forest Research Centre, Faculty of Forest Sciences, Sweden P Savadogo --- Tropical Silviculture and Seed Laboratory, Southern Swedish Forest Research Centre, Faculty of Forest Sciences, Sweden L Sawadogo --- Département Productions Forestières, Burkina Faso D Tiveau --- , République Démocratique du Congo D Zida --- Département Productions Forestières, Burkina Faso M Tigabu --- Tropical Silviculture and Seed Laboratory, Southern Swedish Forest Research Centre, Faculty of Forest Sciences, Sweden PC Oden --- Tropical Silviculture and Seed Laboratory, Southern Swedish Forest Research Centre, Faculty of Forest Sciences, SwedenFire is important for the maintenance and conservation of African savanna ecosystems, and prescribed fire is used in the Sudanian savanna-woodlands of West Africa as a forest management tool. Yet, the effects of fire on savanna ecosystems and especially on... -
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... -
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... -
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... -
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... -
Adaptive management for complex communal rangelands in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Nicky Allsopp --- , South AfricaMany of the intransigent problems facing the world arise in complex systems. In this paper, I propose that communal rangelands in South Africa be recognised as complex social–ecological systems and that one of the reasons that development initiatives have had... -
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... -
Wood supply and forest regeneration consequences of integrated log allocation in western Kenya
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: GilbertO. Ototo DonaldO. OgwenoThe present system of log sales from softwood plantations in Kenya is by stumpage to single product mills. This harvesting system leads to pulping of large diameter logs while allocation of small diameter logs to sawmills is a major cause... -
The effects of ontogenetic maturation in Pinus patula – Part II: Hedge cycling and field performance
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchell N. B. JonesEarly studies suggest that the juvenile period, during which favourable rooting can be achieved from Pinus patula seedling hedges, may be as short as 2 years from the date of sowing. If the effects of hedge maturation cannot be delayed,... -
Towards an Information System for Forestry
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Christoph Kätsch --- Department of Forest Science, BrianV. Bredenkamp --- Department of Forest Science,Management of information as a production factor is imperative in modern forestry practice. However, development of individual application programmes has resulted in systems which cannot be integrated without excessive effort and expense. It is shown that the route to an... -
Alternative Taper Curve Estimation Methods for Eucalyptus cloeziana (F. Muell.)
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: K. P.A. Eerikäinen --- Faculty of Forestry, Finland D. Mabvurira --- , Zimbabwe J. Saramäki --- ,Three types of taper estimation methods for Eucalyptus cloeziana were applied and compared by using Zambian and Zimbabwean plantation data. The methods are: (1) Schumacher's taper equation, (2) diameter prediction method and (3) polynomial taper curve. The Schumacher's taper equation... -
A review of site-growth studies in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: J.H. Louw --- ,The intensive nature of the South African forest industry requires reliable decision support systems to enhance site-specific silviculture. Furthermore, the principle of ecologically sustainable forest management requires a profound improvement in the understanding of the factors controlling tree growth and... -
An investigation into the establishment of indigenous trees on treated mine residue soils in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: NeerajM. Dharamraj --- , WilmaG. Gaum --- Department of Applied Natural Sciences, South Africa Annelize Hildebrand --- Department of Applied Natural Sciences, South AfricaMine residue soils have been the cause of barren landscapes and due to its toxic nature, these soils have proved difficult in establishing any form of vegetation. A selection of indigenous tree species mainly used for the establishment of indigenous... -
Water use efficiency in South African Eucalyptus plantations: A review
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: PeterJ. Dye --- Faculty of Science and Agriculture,The relation between rainfall and Eucalyptus stem growth is investigated using data recorded at three ICFR espacement trials in kwaZulu-Natal. These data show that, for a given rainfall amount, large differences in stem growth may occur at different sites. The... -
Temperament Styles of Nigerian and U.S. Children
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Thomas Oakland --- University of Florida, Andrew Mogaji --- University of Lagos, Jack Dempsey --- University of Florida,Temperament styles of 400 Nigerian children are described in reference to possible gender and age differences and compared with those of 3200 U.S. children in light of Jung's theory of temperament as modified by Myers and Briggs, one that highlights... -
South African Adolescents' Career Development through the Lens of the Systems Theory Framework: An Exploratory Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Mary McMahon --- The University of Queensland, Mark Watson --- Nelson Mandela Metropolitan University, Cheryl Foxcroft --- Nelson Mandela Metropolitan University, Asha Dullabh --- Nelson Mandela Metropolitan University,Adolescent career development has predominantly been studied in the context of middle class Eurocentric cultures and there have been calls for greater attention to the career development of non-dominant and disadvantaged groups. Further, there have been calls to explore career... -
The Scientific Basis of Criminology
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ann-Mari Elizabeth Hesselink --- University of South Africa, Friedo Johann Willem Herbig --- University of South Africa,Criminology as a science has evolved over the past 50 years from a “sub-discipline” into a self-reliant and contemporary discipline. Many adjacent to criminology Social Science experts believe that criminology has ‘nothing to offer’ but mere theoretical explanations while other... -
Guidelines for Counsellors Working with People of African Ancestry in a Sport Context
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Lourens Human --- University of Pretoria, South Africa Taunya Tinsley --- California University of Pennsylvania, PA, Monja Muller --- University of Pretoria, South Africa Sipho Rutsate --- National University of Science and Technology, ZimbabweThe objective this article is to describe five practice guidelines for counsellors working with people of African ancestry in a sport context. The practice guidelines pertain to counsellor training, counsellor perspectives, counsellor services, counsellor ethics and counsellor research. These practice... -
South African Educators' Voice on the Potential Role of Traditional Healers (THs) in Education Support Services
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Johanna L. Geldenhuys --- Nelson Mandela Metropolitan University, South AfricaThe aim of this qualitative research was to explore and describe perceptions of the potential role of traditional healers in education support services. Participants were 42 teachers (males = 13, females = 29) from a school district in the Eastern... -
Offender Rehabilitation and Counselling Dynamics in the South African Correctional Environment: Systems and Prospects
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ann-Mari Elizabeth Hesselink --- University of South Africa, Friedo Johann Willem Herbig --- University of South Africa,This article provides a theoretical overview of the correctional reform as well as rehabilitative and counselling landscape within South African Correctional Centres. Key challenges being faced in this arena include corruption/collusion of correctional staff, poor and failing infrastructure, high staff... -
Longitudinal Predictive Validity of a Learning Potential Test
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Marié de Beer --- University of South Africa,The aim of this article is to provide empirical psychometric evidence of the (longitudinal) predictive validity of a learning potential measure—the Learning Potential Computerised Adaptive Test (LPCAT)—in comparison with standard static tests with school aggregate results as the criterion measure... -
A Modern Assessment Psychometric Approach to Dynamic Assessment
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Marié de Beer --- University of South Africa,Although dynamic assessment (DA) has been hailed as a positive move towards fair assessment, it has generally not been used in educational or industry settings to the same extent that standard (static) tests have been. The present article attempts to... -
A Psychology of Indigenous Healing in Southern Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Stephen David Edwards --- University of Zululand,Converging lines of evidence from various scientific disciplines consistently point to humanity's African roots. In this context, the term “indigenous healing” is used to refer to universal forms of healing that began in Africa and were developed further both locally... -
Cultural Embeddedness of Health, Illness and Healing: Prospects for Integrating Indigenous and Western Healing Practices
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Tholene Sodi --- University of Limpopo, South Africa Olaniyi Bojuwoye --- University of the Western Cape, South AfricaCulture influences conceptualizations about illness, health and healthcare. In this article we argue that Western-oriented health care models have limited success when applied to health conditions of people of non-Western cultures and contend that culture is an important factor in... -
“It's Like Uprooting Trees”: Responsive Treatment for a Case of Complex Post-Traumatic Stress Disorder Following Multiple Rapes
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Francois van der Linde --- Rhodes University, David Edwards --- Rhodes University,This systematic case study documents 27 sessions of assessment and treatment with cognitive therapy of Bongi (23) who presented with major depression, posttraumatic stress disorder and borderline traits. Bongi had been raised in a punitive environment, had been raped three... -
Knowledge and Learning: Views of a Sample of South African Higher Education Students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karen van der Merwe --- North-West University, Werner Nell --- North-West University,This study explored views of knowledge and learning held by a sample of 14 Black South African first year university students (age range = 18–24,50% female). Data was collected by means of semi-structured interviews, group interviews and focus group interviews... -
Confirming the Factor Structure of the 41-Item Version of the Schutte Emotional Intelligence Scale
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Marais Bester --- North-West University, South Africa Cara S. Jonker --- North-West University, South Africa Jan Alewyn Nel --- North-West University, South AfricaThe main aim of this study was to investigate the factor structure of the 41-item version of the Schutte Emotional Intelligence Scale within a South African nursing environment. An availability non-probability sample (N =290) of nurses from hospitals in the... -
Victimisation in the Lives of Lesbian-Identified Women in South Africa: Implications for Clinical Assessment and Treatment
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Anita Padmanabhanunni --- University of the Western Cape, South Africa David Edwards --- Rhodes University, South AfricaFew clinical studies have examined victimisation in the lives of lesbian women in South Africa and whether there are distinct implications for psychological treatment. This paper presents the assessment and treatment of a lesbian-identified South African survivor of childhood sexual... -
A Psycho-Diagnostic Tool for Psychotherapy: Interactional Pattern Analysis (IPA)
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Charl Vorster --- North-West University, South Africa Vera Roos --- North-West University, South Africa Mari Beukes --- North-West University, South AfricaThis article proposes a description of a psycho-diagnostic tool for psychotherapists, the Interactional Pattern Analysis (IPA). Sixteen interpersonal variables are proposed to describe the observable behaviour that constitutes a client's interpersonal style within the context of a particular relationship, such... -
Contemplating the Self: A Brief Phenomenological Participatory Action Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Stephen D. Edwards --- Psychology and Educational Psychology Departments, Sumeshni Govender --- Psychology and Educational Psychology Departments, Dumisani R. Nzima --- Psychology and Educational Psychology Departments, Mandla M. Hlongwane --- Psychology and Educational Psychology Departments, Jabulani D. Thwala --- Psychology and Educational Psychology Departments, Ashmin Singh --- Psychology and Educational Psychology Departments, Pricilla B. Mbele --- Psychology and Educational Psychology Departments,This study examines Self contemplation from a heuristic phenomenological and applied psychological perspective using a participatory action research approach. The participant authors (n = 6; females = 50%, majority ethnicity = isiZulu = 67%) engaged in reflective contemplation of the... -
On the Unboundedness of Control Operators for Bilinear Systems
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Abdelali IdrissiThe aim of this work is to study the classes of unbounded linear control operators which ensure the existence and uniqueness of the mild and strong solutions of certain bilinear control systems. By an abstract approach, similar to that adopted... -
A Lemma On C 0 -semigroups And Applications
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Hugo LeivaIn this note we characterize a large class of C 0-semigroups which can be applied to prove the existence and the uniqueness of the solutions of many systems of partial differential equations. In fact, we apply our result to a... -
Approximate Conserved Quantities of Conservative Dynamical Systems in R 3
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: G. Ünal C.M. KhaliqueApproximate generalized symmetries associated with the resonances of conservative dynamical systems in R 3 have been discussed. It has been shown that an approximate first integral (conserved quantities) can be found from the knowledge of two conservative approximate symmetries. Furthermore,... -
Approximate First Integrals of a Chaotic Hamiltonian System
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: G. Ünal C.M. Khalique G.F. AlişverişçiApproximate first integrals (conserved quantities) of a Hamiltonian dynamical system with two-degrees of freedom which arises in the modeling of galaxy have been obtained based on the approximate Noether symmetries for the resonance ω 1 = ω 2. Furthermore, Kolmogorov-Arnold-Moser... -
Lattice-Valued Convergence Ring and Its Uniform Convergence Structure
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: T.M.G. Ahsanullah --- Department of Mathematics, Saudi ArabiaConsidering L a frame, we introduce the notion of stratified L-neighborhood topological ring, produce some characterization theorems including its Luniformizability. With the help of the notions of stratified convergence structures attributed to Gunther Jäger [10], we introduce and study various... -
OPTIMAL SYSTEMS OF SYMMETRY SUBALGEBRAS FOR BIG MODELS OF GASDYNAMICS
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: S. V. Khabirov --- Institute for Symmetry Analysis and Mathematical Modelling, University of North-West, Mmabatho, South Africa,The gasdynamics equations admit 11 dimensional Lie algebra of transformations for the abitrary state equations. For special state equations the algebra may be expanded. There are 13 special state equations for which the gasdynamics equations are named big models. Some... -
Investigating the interface between health system reform and HIV/AIDS in sub-Saharan Africa: an approach for improving the fight against the epidemic
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: RasmusC Dawes --- , DenmarkDuring the period in which the HIV/AIDS epidemic has taken hold in sub-Saharan Africa, health system reforms have and continue to be introduced throughout the region. In spite of the multidisciplinary research undertaken, it can be questioned whether the relationships... -
South Africa youths’ higher-risk sexual behaviour: an eco-developmental analysis
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Monde Makiwane --- Child, Youth, Family and Social Development, South Africa Zitha Mokomane --- Child, Youth, Family and Social Development, South AfricaDespite their high levels of knowledge about HIV and AIDS, young people ages 15–24 years in South Africa remain disproportionately affected by the epidemic. Young people's continued susceptibility to HIV infection has been consistently linked to intractable higher-risk sexual behaviours... -
African communalism and public health policies: the relevance ofindigenous concepts of personal identity to HIV/AIDS policies in Botswana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Kipton Jensen --- Department of Philosophy and Religion, United States JosephBR Gaie --- Department of Religious Studies, Theology and Philosophy, BotswanaThis article explores the possible relevance of African communalism to HIV/AIDS policies in Botswana and other parts of sub-Saharan Africa. We examine various interpretations of African communalism, which many consider to be the cardinal insight of African thought. We suggest... -
Clinics and home-based care organisations: an interface between theformal and informal health sectors
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Adam Kenneth Boros --- , South AfricaThe article outlines the findings of a study designed to explore the working relationship between home-based caregivers and clinic nurses at locations in two informal settlements in Johannesburg, South Africa. By considering the views and experiences of both sponsored and... -
Why HIV/AIDS should be treated as exceptional: arguments from sub-Saharan Africa and Eastern Europe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Julia Smith --- , United Kingdom Khaled Ahmed --- , South Africa Alan Whiteside --- , South AfricaThe idea that HIV and AIDS gets too much attention and funding emerged in 2008 with a call to end 'AIDS exceptionalism.' This article outlines a short history of AIDS exceptionalism — the idea that HIV and AIDS require a... -
The sublethal effects of zinc at different water temperatures on selected haematological variables in Oreochromis mossambicus
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PP Buthelezi V Wepener DP CyrusTrace metals such as zinc play an important role in the normal metabolic functioning of all organisms. However, metals can become toxic if background concentrations are exceeded in the environment. This study investigated the sublethal effects of zinc on the... -
Branchipodopsis species — specialists of ephemeral rock pools
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Brendonck ML Hamer BJ Riddoch MT SeamanThe anostracan Branchipodopsis genus is widespread throughout southern Africa and is the second most speciose anostracan taxon in this sub-continent. Branchipodopsis species are particularly dominant in small short-lived and clear rock pools, to the vagaries of which they are extremely... -
Physical determinants of the distribution and abundance of the burrowing ocypodid crab Paratylodiplax blephariskios Stebbing in the St. Lucia and Mhlathuze estuaries, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen AT Forbes DP Cyrus SE PiperThe burrowing ocypodid crab, Paratylodiplax blephariskios, is endemic to the southeast coast of southern Africa where it forms an important component of the estuarine benthic fauna in muddy substrata. Two estuaries in KwaZulu-Natal, namely St. Lucia and the Mhlathuze, were... -
Water policy in southern Africa: A brief synopsis of some of the macro driving forces
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AR TurtonThe water sector reforms that are underway in many parts of southern Africa are a manifestation of a global phenomenon. This is rooted in the human response to the undesirable consequences of development, and seeks to introduce the notion of... -
The development of a GIS atlas of southern African freshwater fish
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LEP Scott PH Skelton AJ Booth L VerheustA geographic information systems (GIS) based atlas of southern African freshwater fish has been developed for the SADC countries. The JLB Smith Institute of Ichthyology, in collaboration with ALCOM, has developed a database of freshwater fish for this region from... -
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... -
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... -
A method for monitoring mangrove harvesting at the Mngazana estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Anusha Rajkaran JanineB Adams DerekR du PreezThe Mngazana estuary supports the third largest area of mangroves, and probably the largest stand of Rhizophora mucronata Lamk., in South Africa. The objective of this study was to determine the extent of harvesting in the Mngazana mangrove forest, using... -
Spatial variability in macroinvertebrate assemblages: comparing regional and multivariate approaches for classifying reference sites in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HelenF DallasSpatial variability in macroinvertebrate assemblages was examined with the aim of evaluating the utility of regional classification systems in aquatic bioassessment. Sampling was undertaken at reference sites in the Western Cape and Mpumalanga, South Africa, using the rapid bioassessment method... -
Seasonal variability of macroinvertebrate assemblages in two regions of South Africa: implications for aquatic bioassessment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HelenF DallasSeasonal variability of macroinvertebrate assemblages was examined in two regions of South Africa: Western Cape and Mpumalanga. Sampling was undertaken at reference sites using the rapid bioassessment method SASS4 (South African Scoring System, Version 4). This study examined the influence... -
The impact of dredging on macrobenthic invertebrates in a tributary of the Warri River, Niger delta
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EI Ohimain TOT Imoobe MO Benka-CokerThe macrobenthic invertebrates of a canal, created from a tributary of the Warri River in the mangrove swamp of the Niger Delta, Nigeria, were studied before and after dredging. In the canal dredging resulted in at least a 93% decrease... -
Modelling highly variable daily maximum water temperatures in a perennial South African river system
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NicholasA Rivers-Moore CarelN Bezuidenhout GrahamPW JewittThirty-three months of observed hourly water temperatures were used to calculate daily maximum water temperatures for nine sites within the Sabie-Sand River system, Mpumalanga Province, South Africa. A suite of statistical models for simulating daily maximum water temperatures, of differing... -
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... -
Eolimna archibaldii spec. nov. and Navigiolum adamantiforme comb. nov. (Bacillariophyceae): two possibly endemic elements of the South African diatom flora tolerant to surface water pollution
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JonathanC Taylor Horst Lange-BertalotTwo little-known diatom taxa have been encountered in the saprobic and anthropogenically impacted waters of the Vaal River, South Africa. Eolimna archibaldii, an extremely small-celled species, is described as new to science. Navicula adamantiformis Archibald is transferred to the taxonomically-appropriate... -
Seasonal and diurnal stratification in two small Zimbabwean reservoirs
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Tamuka Nhiwatiwa BrianE MarshallSeasonal and diurnal stratification patterns were studied in two small Zimbabwe reservoirs. The water level of the upper reservoir fluctuated more than that of the lower one and theoretical water retention times were 9 days and 3.6 days, respectively. Rainfall... -
Bioassessment of the ecological integrity of river ecosystems using aquatic macroinvertebrates: an overview with a focus on South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DeanJ Ollis HelenF Dallas KarenJ Esler Charles BoucherAn overview is given of the bioassessment of the ecological integrity of river ecosystems using aquatic macroinvertebrates, focussing on the South African situation within a global context. Biotic indices and their use in aquatic bioassessment are covered, and comparative descriptions... -
Salinity tolerance of the burrowing ocypodid crab, Paratylodiplax blephariskios, in the St. Lucia and Mhlathuze estuaries, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen --- Department of Zoology, South Africa AT Forbes --- , South AfricaThe ocypodid crab, Paratylodiplax blephariskios, is endemic to the southeast coast of southern Africa where it forms an important component of the estuarine benthic fauna in muddy substrata. The St. Lucia and Mhlathuze estuaries are two of the largest estuaries... -
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... -
Application of the Indicators of Hydrological Alteration method to the Mkomazi River, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: V Taylor --- , South Africa R Schulze --- , South Africa G Jewitt --- , South AfricaHydrological regimes play a major role in structuring the biotic diversity within river ecosystems and hydrological variation is recognised as a primary driving force within those ecosystems. The US Nature Conservancy developed a method known as the Indicators of Hydrological... -
A short note on factors affecting the geographic distribution of the burrowing ocypodid crab, Paratylodiplax blephariskios: temperature, habitat and competition
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen --- Department of Zoology, South AfricaThe known distribution of Paratylodiplax blephariskios extends from the Morrumbene estuary in Mozambique to the Mngazana estuary in the Eastern Cape. Laboratory data on the temperature tolerance of P. blephariskios indicated that the crab could survive temperatures between 12.5°C and... -
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... -
Water quality impacts on instream biota of the Shingwedzi River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PSO Fouche --- Department of Zoology, South Africa W Vlok --- Department of Zoology, South AfricaWater quality, macroinvertebrate diversity (using SASS5) and fish diversity (using the fish response assessment index) of the Shingwedzi River system were monitored in 2007/2008 to determine the present status of the system. Possible water pollution sources were identified by aerial... -
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... -
Aspects of population dynamics and feeding by piscivorous birds in the intermittently open Riet River estuary, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW Froneman --- Department of Zoology and Entomology, South Africa JD Blake --- Department of Zoology and Entomology, South Africa P Hulley --- Department of Zoology and Entomology, South AfricaAspects of the population dynamics and feeding activity of piscivorous birds in the small (c. 5 ha) intermittently open Riet River estuary, on the south-eastern coastline of South Africa, were investigated monthly from August 2005 to July 2006. A total... -
Distribution of Nile perch Lates niloticus in southern Lake Victoria is determined by depth and dissolved oxygen concentrations
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PC Goudswaard --- , the Netherlands EFB Katunzi --- , Tanzania JH Wanink --- , the Netherlands F Witte --- , the NetherlandsAlthough Nile perch Lates niloticus is assumed to be sensitive to low oxygen concentrations, it was found in deep water in Lake Victoria, where oxygen depletion is common during the rainy season. Since factors determining Nile perch distribution are not... -
Impact of abattoir waste on Woji Creek, Port Harcourt, Nigeria, using physicochemistry and macrozoobenthic diversity indices
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Zabbey --- Department of Animal Science and Fisheries, Nigeria I Etela --- Department of Animal Science and Fisheries, NigeriaThe impact of waste discharge from Zoo abattoir, Port Harcourt, on the environmental quality of Woji Creek was studied from April 2001 to March 2002 using physicochemistry and diversity of benthic animals as indicators. Priority physicochemical parameters (total suspended solid,... -
Algae, phytoplankton and eutrophication research and management in South Africa: past, present and future
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CE van Ginkel --- , South AfricaA brief history of South African research on and management of algae-, phytoplankton- and eutrophication-related problems is presented, including their ecological, social and economic impacts, which provides a basis for formulation of future research needs. The contributions of southern African... -
Pesticides in South African fresh waters
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TM Ansara-Ross --- Centre for Aquatic Research, Department of Zoology, South Africa V Wepener --- Centre for Aquatic Research, Department of Zoology, South Africa PJ van den Brink --- Department of Aquatic Ecology and Water Quality Management, The Netherlands MJ Ross --- Centre for Aquatic Research, Department of Zoology, South AfricaPublic concern has recently escalated over pesticide contamination of South African aquatic ecosystems. This review of published literature on the occurrence of pesticides within South African freshwater systems indicates that fewer than 50 studies of selected pesticides have been undertaken,... -
Use of a small, intermittently-open estuary by waterbirds: a case study of the East Kleinemonde Estuary, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AI Terörde --- Percy FitzPatrick Institute of African Ornithology, South Africa JK Turpie --- , South AfricaLittle is known of the use and importance of South African small, intermittently-open estuaries to waterbirds. Waterbird activities were monitored in a section of the East Kleinemonde Estuary on the south-east coast of South Africa from June 2004 to May... -
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... -
Physical and chemical characteristics of the Tanzanian inshore and offshore waters of Lake Victoria in 2005–2008
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GW Ngupula --- , Tanzania CN Ezekiel --- , Tanzania IA Kimirei --- , Tanzania E Mboni --- , Tanzania BB Kashindye --- , TanzaniaAssuming that the inshore and offshore waters of Lake Victoria are impacted differently by human activities in its catchment, this study investigated the water quality dynamics of the lake. A total of 29 stations were sampled in 2005–2008 for dissolved... -
South African ecotoxicology — present status and future prognosis
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: V Wepener --- Water Research Group, School of Environmental Sciences and Development, South Africa PM Chapman --- , CanadaToxicology studies the interactions of a chemical substance with individual organisms, whereas ecotoxicology is a multidisciplinary approach incorporating ecology and other disciplines, e.g. chemistry, microbiology, etc., to determine responses of individuals, populations and whole ecosystems to stressors such as chemicals... -
Body-size distribution, biomass estimates and life histories of common insect taxa associated with a submerged macrophyte Lagarosiphon ilicifolius in the Sanyati Basin, Lake Kariba, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Phiri --- , Zimbabwe A Chakona --- Department of Ichthyology and Fisheries Science, South Africa JA Day --- Freshwater Research Unit, Zoology Department, South AfricaThe body-size distributions and biomass estimates of Caenis (Ephemeroptera: Caenidae), Cloeon (Ephemeroptera: Baetidae), Coenagrionidae (Odonata), Micronecta (Hemiptera: Corixidae), Chironominae (Diptera: Chironomidae) and Orthocladiinae (Diptera: Chironomidae), the most common and abundant insect taxa associated with a submerged macrophyte Lagarosiphon ilicifolius in... -
Spatio-temporal variability of surface water quality parameters in a South African estuarine lake system
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IA Russell --- , South AfricaLong-term (20+ years) water quality datasets for estuaries are rare, especially for smaller systems. Monitoring of salinity, temperature, pH, dissolved oxygen and turbidity has been undertaken since 1991 in the intensively utilised, modified, and managed temporarily open/closed Touw Estuary and... -
Bioassessment in ephemeral rivers: constraints and challenges in applying macroinvertebrate sampling protocols
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Watson --- Centre for Environmental Management, South Africa HF Dallas --- , South AfricaHydrology is a major factor controlling the structure and function of river ecosystems. In contrast to perennial rivers, temporary rivers have periods where surface flow ceases resulting in a highly variable flow regime. Existing bioassessment methods in South Africa are... -
Recovery dynamics of zooplankton following mouth-breaching in the temporarily open/closed Mdloti Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Deale --- School of Life Sciences, South Africa R Perissinotto --- School of Life Sciences, South Africa NK Carrasco --- School of Life Sciences, South AfricaMouth-breaching events have major impacts on biological processes in temporarily open/closed estuaries. The aim of this investigation was to monitor zooplankton recovery dynamics following artificial breaching of the Mdloti Estuary in February 2004. Spatial and temporal patterns in zooplankton distribution... -
Health of sharptooth catfish Clarias gariepinus in Pongolapoort Dam, South Africa: a comprehensive study
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: KJ McHugh --- Centre for Aquatic Research, South Africa NJ Smit --- Water Research Group (Ecology), Unit for Environmental Sciences and Management, South Africa JHJ van Vuren --- Centre for Aquatic Research, South Africa JC van Dyk --- Centre for Aquatic Research, South AfricaA histology-based fish health assessment protocol was used in 2009–2010 to assess the health status of Clarias gariepinus from Pongolapoort Dam, South Africa. Nineteen fish were collected by angling. The histology of liver, kidney, gills and testes or ovaries was... -
Relationship between water temperature predictability and aquatic macroinvertebrate assemblages in two South African streams
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BR Eady --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa NA Rivers-Moore --- Centre for Water Resources Research, South Africa TR Hill --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South AfricaVariable seasonal stream temperatures are a critical factor in maintaining aquatic invertebrate community patterns. We investigated whether the degree of predictability in a stream's water temperature profile provides insights into the structure and functional predictability of macroinvertebrate communities. Quarterly macroinvertebrate... -
Temporal variations in the food habits of some fish species in Lake Nokoué, Benin
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: P Gnohossou --- Laboratoire d’Hydrobiologie et Aquaculture, Bénin P Lalèyè --- Laboratoire d’Hydrobiologie et Aquaculture, Bénin P Atachi --- Laboratoire d’Hydrobiologie et Aquaculture, Bénin G Magali --- Laboratoire EcoLab, UMR 5245 CNRS-UPS-INPT, France MC Villanueva --- Laboratoire d’Agronomie, Environnement et Écotoxicologie, France J Moreau --- Laboratoire d’Agronomie, Environnement et Écotoxicologie, FranceStomach contents of the 12 most abundant fish species in Lake Nokoué, Benin, collected between 2003 and 2005, were analysed for temporal variations in their diet. Several species showed seasonal shifts in their diets based on benthic prey abundance and... -
Prunus africana in the Bloukrans River Gorge, Southern Cape
Item type: Journal Article • Journal: South African Forestry Journal • Authors: C.J. Geldenhuys --- George Department of Water Affairs, Forestry and Environmental Conservation,The decline of Prunus africana in the most southern end of its distribution is attributed to unsuitable establishment conditions for the seedlings and adverse climatic conditions. Only 43 trees ≥ 10 cm D.B.H. occur 47% of which are dead. The... -
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... -
The Culling of Large, Non-utilisable Trees in the Southern Cape Forests
Item type: Journal Article • Journal: South African Forestry Journal • Authors: C.J. Geldenhuys --- Department of Environment Affairs,The killing of large, non-utilisable trees is a management problem in the southern Cape forests. An experiment was carried out to compare ring-barking and 3 % and 6 % 2,4,5-T in diesoline. The main species treated were Olea capensis subsp... -
Climatic and Altitudinal Criteria for Commercial Afforestation with Special Reference to Natal
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- Wattle Research Institute and Department of Agricultural Engineering, South Africa R.E. Schulze --- Wattle Research Institute and Department of Agricultural Engineering, South AfricaCriteria of altitude and climate such as mean annual precipitation, mean annual. January and July temperatures, mean daily maximum and minimum temperatures for January and July respectively and duration of soil moisture deficit are given for five main commercial tree... -
Form Quotients and Stem Form of Eucalyptus cloeziana
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. van Laar --- Faculty of Forestry,This paper deals with a stem form study in Eucalyptus cloeziana. Sample tree data obtained from the ICFR were used to obtain the diameter at different relative positions along the stem. These diameters were subsequently regressed on breast height diameter... -
8. A Different Approach to Site Evaluation and Some Preliminary Results
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- , R.C. Purnell --- de Wet Forestry Research Centre,This paper describes a new approach towards site evaluation of exotic tree species which have a limited and non-representative occurrence. Instead of applying the classical site factor analysis and measuring a considerable number of sample plots of different ages at... -
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... -
Ecological status of Hout River Dam, Limpopo province, South Africa, using fish condition and health assessment index protocols: a preliminary investigation
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JR Sara --- Aquaculture Research Unit, South Africa WJ Smit --- Department of Biodiversity, South Africa LJC Erasmus --- Department of Physiology and Environmental Health, South Africa TP Ramalepe --- Department of Biodiversity, South Africa ME Mogashoa --- Department of Physiology and Environmental Health, South Africa ME Raphahlelo --- Department of Biodiversity, South Africa J Theron --- Aquaculture Research Unit, South Africa WJ Luus-Powell --- Department of Biodiversity, South AfricaThe ecological status of Hout River Dam was evaluated in 2011 by assessing fish health, based on condition factor (K), health assessment index (HAI) and inverted parasite index (IPI), which provided a simple and rapid means of establishing the health... -
Hybridisation between native Oreochromis species and introduced Nile tilapia O. niloticus in the Kafue River, Zambia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AM Deines --- Notre Dame Environmental Change Initiative, and Department of Biological Sciences, USA I Bbole --- The Copperbelt University, Zambia C Katongo --- The Copperbelt University, Zambia JL Feder --- Notre Dame Environmental Change Initiative, and Department of Biological Sciences, USA DM Lodge --- Notre Dame Environmental Change Initiative, and Department of Biological Sciences, USAThe Nile tilapia Oreochromis niloticus has been introduced throughout Africa outside its native range for aquaculture purposes. Hybridisation between escaped O. niloticus and native Oreochromis species is of concern due to potential negative effects on wild genetic resources for conservation,... -
A hotspot of large branchiopod diversity in south-eastern Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Nhiwatiwa --- KU Leuven, Laboratory of Aquatic Ecology, Belgium A Waterkeyn --- KU Leuven, Laboratory of Aquatic Ecology, Belgium BJ Riddoch --- Department of Biological and Medical Sciences, UK L Brendonck --- KU Leuven, Laboratory of Aquatic Ecology, BelgiumLarge branchiopods are considered threatened across much of their global range. However, because several regions, including Zimbabwe in general and its south-eastern lowveld in particular, remain largely unstudied, interpretations of species distribution patterns are often based on limited data. A... -
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... -
A RULE-BASED ECOSYSTEM MODEL FOR THE MANAGEMENT OF LAKE ST LUCIA
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: R.H. Taylor --- , South Africa B.P. Farm --- Dept. of Ecology and Behavioural Biology, United States of America A.M. Starfield --- Dept. of Ecology and Behavioural Biology, United States of AmericaLand transformations in the catchments of Lake St Lucia have altered the hydrology of the system and increased management is now needed to counteract these changes. There are several management options available, but prior to implementing them we must be... -
Observations on the Diel Vertical Distribution of Hydromedusae in the Southern Benguela
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E. Buecher M. J. GibbonsDiel vertical migration (DVM) of six common species of hydromedusae was investigated during two drogue studies conducted in St Helena Bay on the west coast of South Africa in February 1995. Clytia spp., Obelia spp. and Bougainvillia macloviana, were largely... -
Climatology and Variability of Sea Surface Temperature and Surface Chlorophyll in the Benguela and Agulhas Ecosystems As Observed by Satellite Imagery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H. Demarcq R. G. Barlow F. A. ShillingtonA climatology of satellite-derived sea surface semperature (SST) and surface chlorophyll a concentration (Chl), and their associated variability at time-scales from weeks to years, was constructed for the Benguela and Agulhas ecosystems. Global area coverage data at 4.5 km spatial... -
Hydromedusae Off the Orange River Mouth, Southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C. Sparks M. J. GibbonsA total of 242 zooplankton samples from the upper 100 m of the water column was collected discontinuously from March 1997 to January 1999 off the Orange River mouth on the west coast of southern Africa. Six species of hydromedusae... -
Ecosystem approach to fisheries management in the southern Benguela: a workshop overview
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L. J. Shannon K. L. Cochrane C. L. Moloney P. FréonA workshop was held in Cape Town in December 2002 to introduce the concept of an ecosystem approach to fisheries (EAF) management in the southern Benguela, and to examine the options for implementing an EAF in South Africa. The workshop... -
An ecosystem approach to fisheries in the southern Benguela context
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K. L. Cochrane C. J. Augustyn A. C. Cockcroft J. H. M. David M. H. Griffiths J. C. Groeneveld M. R. Lipińnski M. J. Smale C. D. Smith R. J. Q. TarrThe 2001 Reykjavík Declaration on Responsible Fisheries in the Marine Ecosystem and the Plan of Implementation of the 2002 World Summit on Sustainable Development highlighted the need in fisheries to look beyond considering only the target species and to consider... -
Contributions of the Benguela ecology programme to pelagic fisheries management in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C. L. Moloney C. D. Van Der Lingen L. Hutchings J. G. FieldIn 1982, the Benguela Ecology Programme (BEP) created a formal, multi-institutional research partnership in South Africa. During the next two decades, the BEP directed many aspects of pelagic ecosystem research in the southern Benguela upwelling region, aiming to improve fisheries... -
A brief introduction to some approaches to multispecies/ecosystem modelling in the context of their possible application in the management of South African fisheries
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D. S. Butterworth É. E. PlagányiAspects of the potential application of multispecies/ecosystem modelling to advise the management of South African fisheries are discussed. In general, reliable predictive ability from such models is likely to be achieved sooner for top predators, because relatively fewer links need... -
An ecosystem framework for fisheries management in the southern Benguela upwelling system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L. J. Shannon C. L. MoloneyA "four-step framework" for applying ecosystem approaches to fisheries management in the southern Benguela is proposed. First, static ecosystem models can be used to highlight important interactions by assessing the net trophic impacts of each species on all the others... -
Ecosystem approach to fisheries management in the northern Benguela: the Namibian experience
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J-P. Roux L. J. ShannonThe northern Benguela marine resources have a long history of questionable management primarily because of the limitations of management measures under the political framework of the time (either free access or under an international authority with no national representation, authority... -
Simulations of fishing effects on the southern Benguela fish community using an individual-based model: learning from a comparison with ECOSIM
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Y-J. Shin L. J. Shannon P. M. CuryBy applying an individual-based model (OSMOSE) to the southern Benguela ecosystem, a multispecies analysis is proposed, complementary to that provided by the application of ECOPATH/ECOSIM models. To reconstruct marine foodwebs, OSMOSE is based on the hypothesis that predation is a... -
Quantification and representation of potential spatial interactions in the southern Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L. Drapeau L. Pecquerie P. Fréon L. J. ShannonThis work explores the potential spatial interactions between 13 key commercial species of the southern Benguela ecosystem: sardine Sardinops sagax, anchovy Engraulis encrasicolus, round herring Etrumeus whiteheadi, horse mackerel Trachurus trachurus capensis, chub mackerel Scomber japonicus, chokka squid Loligo vulgaris... -
Modelling stock dynamics in the southern Benguela ecosystem for the period 1978–2002
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L. J. Shannon V. Christensen C. J. WaltersAn ecosystem model of the southern Benguela was fitted to available time-series data for the period 1978–2002, to explore how changes in target fish populations in this ecosystem can be attributed to feeding interaction terms and population control patterns, the... -
Influence of sample size and sampling frequency on the quantitative dietary descriptions of a predatory fish in the Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N. McQueen M. H. GriffithsSpatial and temporal variation in the diet and feeding intensity of snoek, Thyrsites atun, a top predator of the southern Benguela, was investigated to provide information on data requirements for accuracy of annual diets as inputs to ecosystem models. Appropriate... -
Lessons learnt from a comparison of three ecosystem models for Port Phillip Bay, Australia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E. A. Fulton A. D. M. SmithComparing multiple models applied to the same system can be highly instructive, both with regard to the system of interest and the models. In this case, three ecosystem simulation models (ECOSIM, Bay Model 2 [BM2] and the Integrated Generic Bay... -
Review of indicators in fisheries management – a development perspective
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P. Degnbol A. JarreA review of indicators for an ecosystem approach to fisheries management is presented, focusing on multispecies fisheries and limited resources for assessments and implementation, as often is the case in developing countries. Emphasizing the need to link indicators to management... -
Oceanic variability in the western sector of Algoa Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: EH Schumann JRS Churchill HJ ZaaymanThe city of Port Elizabeth lies in the western sector of Algoa Bay, and a number of projects have investigated the oceanic temperature, salinity and current structures in the vicinity. This paper analyses past results, and then incorporates measurements of... -
Seasonal variation in phytoplankton in the southern Benguela: pigment indices and ocean colour
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Barlow H Sessions M Balarin S Weeks C Whittle L HutchingsPigment indices and satellite imagery were used to investigate the seasonal variation in phytoplankton in the southern Benguela, with the aid of monthly monitoring on two transect lines. Sea surface temperature images revealed the similarity in thermal conditions during autumn,... -
Diet of Cape fur seals Arctocephalus pusillus pusillus at three mainland breeding colonies in Namibia. 2. Temporal variation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Mecenero J-P Roux LG Underhill SP KirkmanScat analysis was used to assess temporal variability in the diet composition of Cape fur seals Arctocephalus pusillus pusillus from three breeding colonies in Namibia (January 1994 to April 2002). The diet displayed significant inter- and intra-annual variation in composition... -
How can science contribute to an ecosystem approach to pelagic, demersal and rock lobster fisheries in South Africa?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LJ Shannon PM Cury D Nel CD Van Der Lingen RW Leslie SL Brouwer AC Cockcroft L HutchingsSouth Africa is committed to moving towards an Ecosystem Approach to Fisheries (EAF) and has laid the foundations for this using a three-pronged approach: through a project (EAF Feasibility Study) under the Benguela Current Large Marine Ecosystem Programme; through a... -
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... -
A knowledge base for management of the capital-intensive fishery for small pelagic fish off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TP Fairweather M Hara CD van der Lingen J Raakjær LJ Shannon GG Louw P Degnbol RJM CrawfordAs a contribution to South Africa's move towards an ecosystem approach to fisheries management, this study explores the existence of common perceptions about South Africa's pelagic fishery between resource users and scientists. It represents a collaborative research effort of social... -
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... -
A spatial- and age-structured assessment model to estimate the impact of illegal fishing and ecosystem change on the South African abalone Haliotis midae resource
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ÉE Plagányi --- Department of Mathematics and Applied Mathematics, South Africa DS Butterworth --- Department of Mathematics and Applied Mathematics, South AfricaThe management of abalone stocks worldwide is complicated by factors such as illegal fishing combined with the difficulties of assessing a sedentary (but not immobile) resource that is often patchily distributed. The South African abalone Haliotis midae fishery is faced... -
Temporal changes in kelp forest benthic communities following an invasion by the rock lobster Jasus lalandii
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LK Blamey --- , South Africa GM Branch --- , South Africa KE Reaugh-Flower --- , South AfricaThe rock lobster Jasus lalandii expanded its centre of distribution south-eastwards into an area known as ‘East of Cape Hangklip’ on the south-west coast of South Africa in the early 1990s. Using historical and present data, we analysed differences in... -
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... -
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)... -
Modelling regime shifts in the southern Benguela: a frame-based approach
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MD Smith --- Marine Research (MA-RE) Institute and Zoology Department, South Africa A Jarre --- Marine Research (MA-RE) Institute and Zoology Department, South AfricaThis study explores the usefulness of a frame-based modelling approach in the southern Benguela upwelling ecosystem, with four frames describing observed small pelagic fish dominance patterns. We modelled the dynamics of sardine Sardinops sagax and anchovy Engraulis encrasicolus populations under... -
Cross-shelf observations of diet and diel feeding behaviour of the bearded goby Sufflogobius bibarbatus off Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Hundt --- Department of Biology, Norway AC Utne-Palm --- Department of Biology, Norway MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaThe diet of the bearded goby Sufflogobius bibarbatus was studied at two 48 h stations off the Namibian coast. The inner station (120 m) was characterised by a deep layer of low-oxygen bottom water (<0.5 ml DO l−1 or <10%... -
Changes in demersal fish assemblages on the west coast of South Africa, 1986–2009
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LJ Atkinson --- , South Africa RW Leslie --- Fisheries Branch, Department of Agriculture, South Africa JG Field --- , South Africa A Jarre --- , South AfricaResearch survey data collected over 24 years (1986–2009) were used to explore long-term changes in demersal fish assemblages on the west coast of South Africa. Differences in spatial (latitude and depth) and temporal (seasonal and annual) factors were examined using... -
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... -
New perspectives in small-scale fisheries management: challenges and prospects for implementation in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Sowman --- Environmental Evaluation Unit, South AfricaWorldwide, the past 15–20 years has seen a significant shift in thinking and approaches to the management of small-scale fisheries. This is in response to the recognition that conventional fisheries management is not equipped to deal with the complexities, uncertainties... -
Prioritising range-wide scientific monitoring of the Cape fur seal in southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Kirkman --- Department of Environmental Affairs, South Africa WH Oosthuizen --- Department of Environmental Affairs, South Africa MA Meÿer --- Department of Environmental Affairs, South Africa SM Seakamela --- Department of Environmental Affairs, South Africa LG Underhill --- Department of Zoology, South AfricaThe range of the Cape fur seal Arctocephalus pusillus pusillus population largely coincides with the region of the cold, nutrient-rich Benguela Current Large Marine Ecosystem (BCLME) adjoining the west coast of South Africa, Namibia and Angola. Range-wide scientific monitoring of... -
Ecological distribution of the shrimp Nematopalaemon schmitti (Crustacea: Decapoda: Caridea) in three bays on the south-eastern coast of Brazil
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Almeida --- NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Brazil A Fransozo --- NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Brazil GM Teixeira --- NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Brazil KAN Hiroki --- NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Brazil M Furlan --- NEBECC (Crustacean Biology, Ecology and Culture Study Group), Departamento de Zoologia, Brazil G Bertini --- , BrazilThe relationships between the spatial and temporal variations in the abundance of the shrimp Nematopalaemon schmitti and water temperature, salinity, and texture and organic-matter content of the sediment, were analysed in Ubatumirim, Ubatuba and Mar Virado bays on the northern... -
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... -
South African kelp moving eastwards: the discovery of Ecklonia maxima (Osbeck) Papenfuss at De Hoop Nature Reserve on the south coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JJ Bolton --- Botany Department and Marine Research Institute, South Africa RJ Anderson --- Botany Department and Marine Research Institute, South Africa AJ Smit --- School of Biological and Conservation Sciences, Faculty of Science, South Africa MD Rothman --- Botany Department and Marine Research Institute, South AfricaHistorical and recent evidence is documented to demonstrate that the eastern limit of the major kelp-bed forming seaweed Ecklonia maxima has moved c. 73 km eastward along the south coast of South Africa since 2006, after remaining unchanged for almost... -
Thermal constraints on the respiration and excretion rates of krill, Euphausia hanseni and Nematoscelis megalops, in the northern Benguela upwelling system off Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Werner --- , Germany K Huenerlage --- , Germany H Verheye --- Oceans and Coasts, Department of Environmental Affairs, South Africa F Buchholz --- , GermanyRates of respiration and ammonia excretion of Euphausia hanseni and Nematoscelis megalops were determined experimentally at four temperatures representative of conditions encountered by these euphausiid species in the northern Benguela upwelling environment. The respiration rate increased from 7.7 µmol O2... -
Variability in estuarine water temperature gradients and influence on the distribution of zooplankton: a biogeographical perspective
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TH Wooldridge --- Department of Zoology, South Africa SHP Deyzel --- , South AfricaStructure and variability of water temperature gradients and potential influence on distribution of two tropical zooplankters (the mysid Mesopodopsis africana and the copepod Acartia natalensis) and their temperate congenerics (M. wooldridgei and A. longipatella) was investigated over a 10-year period... -
St Helena Bay (southern Benguela) then and now: muted climate signals, large human impact
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Hutchings --- Department of Environmental Affairs, South Africa A Jarre --- Marine Research (MA-RE) Institute, South Africa T Lamont --- Department of Environmental Affairs, South Africa M van den Berg --- Department of Environmental Affairs, South Africa SP Kirkman --- Department of Environmental Affairs, South AfricaThe development of suitable reference states for ecosystem-based management requires documentation of changes in structure and functioning of marine ecosystems, including assessment of the relative importance of bottom-up and top-down processes as drivers of change. We used monitoring data available... -
Long-term trends in the recreational shore-fishery for elf Pomatomus saltatrix (Pomatomidae) along the KwaZulu-Natal coast, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JQ Maggs --- , South Africa BQ Mann --- , South Africa RP van der Elst --- , South AfricaElf Pomatomus saltatrix account for between 28% and 80% of the annually recorded recreational shore-angling catch in KwaZulu-Natal, South Africa, and have been subjected to various management regimes over the past 33 years. Management of the elf fishery was amended... -
Upwelling and ocean structures off Algoa Bay and the south-east coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WS Goschen --- South African Environmental Observation Network (SAEON), South Africa EH Schumann --- Department of Geosciences, South Africa KS Bernard --- South African Environmental Observation Network (SAEON), South Africa SE Bailey --- South African Environmental Observation Network (SAEON), South Africa SHP Deyzel --- South African Environmental Observation Network (SAEON), South AfricaAs the Agulhas Current flows along the south-east coast of South Africa, a number of processes operate that bring cold, deep water up onto the narrow shelf. As a consequence, upwelling along the coastline is enhanced farther southward and downstream... -
Role of the source community for the recovery of seagrass associated meiofauna: a field colonisation experiment with seagrass mimics in Diani Beach, Kenya
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LN Daudi --- , Kenya JN Uku --- , Kenya M De Troch --- Biology Department, Marine Biology, BelgiumSeagrass communities are subject to frequent disturbances that can affect the associated fauna. Seagrass loss in Kenya has been mainly due to extensive grazing by the sea urchin Tripneustes gratilla, leading to habitat fragmentation. The challenge is whether the system... -
Modelling the effect of food availability on recruitment success of Cape anchovy ichthyoplankton in the southern Benguela upwelling system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: V Koné --- Département d'Environnement, Côte d'Ivoire C Lett --- , France P Fréon --- , FranceCape anchovy Engraulis encrasicolus adapted its reproductive strategies to the southern Benguela system by spawning over the Agulhas Bank, an area of low productivity that is located upstream of the predominant upwelling system. Frontal jet currents transport eggs and larvae... -
Reviewing evidence of marine ecosystem change off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C L Moloney --- Department of Biological Sciences, South Africa S T Fennessy --- Oceanographic Research Institute, South Africa M J Gibbons --- Department of Biodiversity and Conservation Biology, South Africa A Roychoudhury --- Department of Earth Sciences, South Africa F A Shillington --- Marine Research Institute, South Africa B P von der Heyden --- Department of Earth Sciences, South Africa K Watermeyer --- Department of Biological Sciences, South AfricaRecent changes have been observed in South African marine ecosystems. The main pressures on these ecosystems are fishing, climate change, pollution, ocean acidification and mining. The best long-term datasets are for trends in fishing pressures but there are many gaps,... -
Stock-environment recruitment analysis for Namibian Cape hake Merluccius capensis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Kainge --- National Marine Information and Research Centre, Namibia N Bahamon --- Centre d'Estudis Avançats de Blanes (CEAB-CSIC), Spain CH Bartholomae --- National Marine Information and Research Centre, Namibia JN Kathena --- National Marine Information and Research Centre, Namibia AK van der Plas --- National Marine Information and Research Centre, Namibia A Gordoa --- Centre d'Estudis Avançats de Blanes (CEAB-CSIC), SpainThe factors modulating recruitment success of Cape hake Merluccius capensis in Namibian waters are still unresolved. In this study, we used generalised additive models, regression tree analysis and the conventional Ricker model to examine the effect of environmental indices and... -
Relations Key to Innovations – Peasants, Institutions and Technical Change on the Mossi Plateau in Burkina Faso
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mats Hårsmar --- , SwedenHow can technical changes within food crop cultivation in a country like Burkina Faso be explained? This is an important question for the reduction of poverty, for enhanced food security as well as for economic growth. Poor countries, where agriculture... -
Assessing Pharmaceutical Innovation in Tunisia: An Empirical Survey on Firms' Knowledge-Capital and an Analysis of the National Sectoral Innovation System
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nejla Yacoub --- Faculty of Economics and Management Sciences, TunisiaThe objective of this research was to assess pharmaceutical innovation in Tunisia. First, we examined the national sectoral innovation system (NSIS), focusing on the objectives and instruments of the industrial and innovation policy. Second, we adopted an empirical approach based... -
A Knowledge Generation System and Innovation Policy for countries of the Customs Union (Belarus, Kazakhstan, Russia)
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nina Bohdan --- , BelarusThis paper considers the problem of forming a Single Economic Area of the Customs Union (Belarus, Russia and Kazakhstan) from the perspective of knowledge generation. Based on the commonalities of knowledge generation and the characteristics of the post-Soviet development, there... -
Towards a Technology Policy for Renewable Energy Development in Africa: A Systems of Innovation Perspective
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ogundiran Soumonni --- Wits Business School, South AfricaThe objective of this paper is to use the systems of innovation (SI) perspective to describe how African countries might increase their rates of access to electricity, and by extension their capacity for broad-based industrialization, through renewable energy. The paper... -
Mobile Money Technology and the Fast Disappearing African Digital Divide
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Joseph M. Kizza --- Department of Computer Science and Engineering, USAAfrica had a late start in the race to acquire most technologies and more so the information communication technologies (ICT). This last place in the race, compared to other continents, created the largest and deepest digital divide ever recorded in... -
The effect of bottom heat on rooting Pinus patula and Pinus elliottii x Pinus caribaea stem cuttings in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R.G. Mitchell --- Sappi Forests Research, South AfricaFive trials, testing the effect ofbottom heat on rooting, were set between January 1995 and December 1996 on P. patula and P. elliottii x P. caribaea cuttings as a method of improving root strike. In four out of five trials... -
Socio-economic impact of ox skidding project to the surrounding villages of Mount Meru forest plantations, Northern Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: W.S. Abeli --- Faculty of Forestry and Nature Conservation, Tanzania J.R. Maximillian --- Faculty of Forestry and Nature Conservation, Tanzania A.E. Kweka --- Faculty of Forestry and Nature Conservation, Tanzania D.T.K. Shemwetta --- Faculty of Forestry and Nature Conservation, TanzaniaThe ox skidding project was initiated with the objective ofusing oxen for transporting logs from the stump sites to the landings. It was supposed to be a participatory research project aimed at integrating scientific knowledge with practical skills and resource... -
The economic value of Acacia karroo in small-scale farming systems and game farming in northern KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: T.S. Mkhabela --- Isithebe Agricultural and Rural Research Consultancy,The purpose of the investigation was to examine current knowledge, by local people, of the agroforestry roles and the economic importance that the Acacia karroo tree plays in the farming systems or small-scale farmers and game farming in the Dundee... -
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... -
The effects of ontogenetic maturation in Pinus patula - Part 1: nursery performance
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. G. Mitchell --- Sappi Forests Research, Africa J. Zwolinski --- Forestry Programme, Africa N. B. Jones --- Sappi Forests Research, AfricaThe age at which parent or donor hedges reach ontogenetic maturity has frequently been cited as a debilitating factor in the production of conifer cuttings. This point varies between species and prevailing environmental conditions. Among other things, a lack of... -
The use of species–stem curves in sampling the development of the Zambian miombo woodland species in charcoal production and slash-and-burn regrowth stands
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: S Syampungani --- School of Natural Resources, Zambia CJ Geldenhuys --- Department of Forest and Wood Science, South Africa PW Chirwa --- Faculty of Natural and Agricultural Sciences, South AfricaThe use of fixed-area plot methods was considered unsuitable to compare the responses and recovery over time of different miombo woodland species to different land-use practices (i.e. charcoal production and slash-and-burn agriculture). Young regrowth stages have many stems and the... -
A stratification of the South African forestry landscape based on climatic parameters
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JH Louw --- School of Natural Resource Management, South Africa I Germishuizen --- , South Africa CW Smith --- Paperbark Forestry Consulting, South AfricaThe benefits of high-resolution forest site classification systems have been widely acknowledged in South Africa as a prerequisite for decision-making in forestry management. Although substantial research and development work have been done on categorising and mapping the soil and geological... -
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... -
An allometric equation for estimating stem biomass of Acacia auriculiformis in the north-eastern region of Bangladesh
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jiban Chandra Deb --- Department of Forestry and Environmental Science, Bangladesh Md. Abdul Halim --- Department of Forestry and Environmental Science, Bangladesh Enam Ahmed --- Department of Forestry and Environmental Science, BangladeshTree biomass plays an important role in sustainable management and in estimating forest carbon stocks. The objective of this study was to select the best model for measuring stem biomass of Acacia auriculiformis in the study area. Data from five... -
Stem biomass and volume models of selected tropical tree species in West Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: GHS Guendehou --- , Bénin A Lehtonen --- , Finland M Moudachirou --- Laboratoire de Pharmacognosie, Faculté des Sciences et Techniques, Bénin R Mäkipää --- , Finland B Sinsin --- Laboratoire d'Ecologie Appliquée, Faculté des Sciences Agronomiques, BéninEstimating tree volume and biomass constitutes an essential part of the forest resources assessment and the evaluation of the climate change mitigation potential of forests through biomass accumulation and carbon sequestration. This research article provides stem volume and biomass equations... -
Machine productivity and residual harvesting residues associated with a cut-to-length harvest system in southern Tasmania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MR Ghaffariyan --- , Australia J Sessions --- Department of Forest Engineering, Resources and Management, USA M Brown --- Office of PVC Research, AustraliaThe cut-to-length method is a preferred method for harvest of pine plantations in Australia. The cut-to-length method studied in southern Tasmania consists of a feller-buncher, processor, forwarder, grapple loader and tractortrailers that were producing only pulp logs for the plantation... -
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... -
Data-protection standards and confidentiality of HIV/AIDS status in the workplace — a South African case study
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Zuzanna Muskat-GorskaThe article contextualises an emerging new regime for information privacy in South Africa (i.e. the draft Protection of Personal Information Bill). Subsequently, it discusses the possibility of successful implementation of international data-protection standards in an environment where there is an... -
The support needs of South African educators affected by HIV and AIDS
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Linda Theron --- School of Education Sciences, Faculty of Humanities, South AfricaIn a qualitative study of 77 South African educators, participants were asked to explain how they are affected by HIV and AIDS and how they would best like to be supported in response to this. The term ‘affected’ refers to... -
Temporal trends in total phosphorus, temperature, oxygen, chlorophyll a and phytoplankton populations in Hartbeespoort Dam and Roodeplaat Dam, South Africa, between 1980 and 2000
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CarinE van Ginkel MichaelJ SilberbauerEutrophication, phytoplankton blooms and changes to the phytoplankton composition are some of the problems facing the managers of Hartbeespoort Dam and Roodeplaat Dam. Trends, both decreasing and increasing, are visible in the phosphorus concentrations, temperatures, dissolved oxygen concentrations and chlorophyll... -
Water quality in South African temporarily open/closed estuaries: a conceptual model
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GavinC Snow Susan TaljaardOf the five types of estuaries found in South Africa, temporarily open/closed estuaries comprise approximately 70% of the total. This paper provides an overview and a simple conceptual model of the water quality features and characteristics of temporarily open/closed estuaries... -
Declining catch per unit effort of an estuarine-dependent fish, Rhabdosargus sarba (Teleostei: Sparidae), in the marine environment following closure of the St Lucia Estuarine System, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BruceQ Mann Pierre PradervandMonitoring of catch per unit effort of the tropical stumpnose Rhabdosargus sarba in the St Lucia Marine Reserve between 2001 and 2005 revealed a significant decline. A similar decline was evident from shore patrol data collected by Ezemvelo KwaZulu-Natal Wildlife... -
The effect of biotope-specific sampling for aquatic macroinvertebrates on reference site classification and the identification of environmental predictors in Mpumalanga, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HelenF DallasThe classification of reference sites based on macroinvertebrate assemblages sampled in different aquatic biotopes in Mpumalanga, South Africa, was examined. Environmental variables that best predicted group membership for each of four classifications (stones, vegetation, sand and these three biotopes combined)... -
Macroinvertebrate colonisation of artificial substrates in a Nigerian river I: gravel and leaf litter
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JO Olomukoro U OkologumeBenthic macroinvertebrate colonisation of artificial gravel and leaf litter substrates over periods of four to 40 days was examined in the Ogba River, Benin City, Nigeria. Of all the assemblages of organisms identified (398 individuals, 27 taxa) on different substrates,... -
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... -
Remediation of eutrophic water using Lemna minor in a controlled environment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AA Ansari FA KhanThe growth response of common duckweed Lemna minor was studied at various temperature and pH levels for its possible application for remediating eutrophic waters. The dry weight, chlorophyll a, nitrogen, phosphorus, potassium, peroxidase (POD), catalase (CAT) and malondialdehyde (MDA) levels... -
Zooplankton composition, abundance and distribution in selected south and west coast estuaries in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PH Montoya-Maya --- Department of Ichthyology and Fisheries Science, South Africa NA Strydom --- , South AfricaIn order to contribute to the understanding of estuarine zooplankton dynamics in cool-temperate systems, zooplankton samples were collected by plankton tows, using two modified WP2 nets, in nine estuaries on the south and west coasts of South Africa, seasonally between... -
Photosynthetic differences between Microcystis aeruginosa and Oscillatoria simplicissima in relation to species succession in the Vaal River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Venter --- School of Environmental Sciences and Development (Botany Division), S du Plessis --- School of Environmental Sciences and Development (Botany Division), PDR van Heerden --- School of Environmental Sciences and Development (Botany Division), AJ Strauss --- School of Environmental Sciences and Development (Botany Division), J Bezuidenhout --- School of Environmental Sciences and Development (Botany Division),In 1991 Oscillatoria simplicissima replaced Microcystis aeruginosa in the Vaal River, South Africa. This study explored the reason for this succession by looking at the photosynthetic performance of these two cyanoprokaryotes at different temperatures, light intensities and N:P ratios. Microcystis... -
Diel vertical migration of anchovy Engraulis encrasicolus larvae in the northern Benguela
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: EK Stenevik S Sundby R CloeteThe diel vertical migration of anchovy Engraulis encrasicolus larvae was studied in the northern Benguela during a survey in April 2001. The diel pattern is described in relation to the degree of swimbladder inflation and the vertical structure of temperature... -
Short-term variability in alongshore winds and temperature off Swakopmund, Namibia, during a non-upwelling event in 1998–1999
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CH Bartholomae E HagenSwakopmund is a popular coastal resort in Namibia, especially during the summer holiday season when daily sea temperatures can fluctuate several degrees in a short period. Hourly measurements of the near-bottom water temperature were collected off the Swakopmund Jetty to... -
Towards the development of environmental indices for the Namibian shelf, with particular reference to fisheries management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CH Bartholomae AK van der PlasThe Namibian Ministry of Fisheries and Marine Resources has the task of collecting and providing relevant oceanographic information for management of their fisheries. However, quality information is difficult to provide because of the complexity of the processes involved in the... -
A benthic survey of the rocky reefs off Pondoland, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Celliers BQ Mann AHH Macdonald MH SchleyerA subtidal marine biodiversity survey was carried out on shallow reefs (−1m to −30m) in the proclaimed Pondoland Marine Protected Area between Port Edward and Port St Johns, South Africa. A total of 26 benthic reef transects was undertaken involving... -
Application of a chlorophyll index derived from satellite data to investigate the variability of phytoplankton in the Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H Demarcq R Barlow L HutchingsThe spatial and temporal variability in phytoplankton biomass in the Benguela ecosystem was investigated over an 8-year period using a chlorophyll index (Chl Index) derived from low resolution SeaWiFS ocean colour data. Monthly composite images revealed that the surface chlorophyll... -
Comparison of the effects of different linefishing methods on catch composition and capture mortality of South African temperate reef fish
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Götz SE Kerwath CG Attwood WHH SauerThe effects of hook size, bait type, water depth and fishing effort on the selectivity and capture mortality of reef fish were investigated in a standardised fishing experiment on the temperate south coast of South Africa. A total of 2... -
Application of the sequential t-test algorithm for analysing regime shifts to the southern Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JAE Howard A Jarre AE Clark CL MoloneyLong-term ecosystem changes, such as regime shifts, have occurred in several marine ecosystems world-wide. Multivariate statistical methods have been used to detect such changes. A new method known as the sequential t-test algorithm for analysing regime shifts (STARS) is applied... -
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... -
Population structure and growth of polydorid polychaetes that infest cultured abalone Haliotis midae
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CA Simon AJ BoothPolydorid polychaetes can infest cultured abalone thereby reducing productivity. In order to effectively control these pests, their reproductive biology must be understood. The population dynamics and reproduction of polydorids infesting abalone Haliotis midae from two farms in South Africa is... -
Temperature preference of juvenile dusky kob Argyrosomus japonicus (Pisces: Sciaenidae)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Bernatzeder PJ BritzThe final temperature preference of cultured juvenile dusky kob is determined to provide an indicator of their optimum temperature for growth. Trials were conducted over a five-day period in horizontal temperature gradients ranging from 21°C to 27°C. Control trials were... -
Comparing internal and external drivers in the southern Benguela and the southern and northern Humboldt upwelling ecosystems
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LJ Shannon S Neira M TaylorTrophic models of three upwelling ecosystems, the southern Benguela (South African), southern Humboldt (Chilean) and northern Humboldt (Peruvian) systems, have been fitted to catch, abundance and fishing mortality time-series. Three drivers were considered during the model fitting: internal forcing by... -
Changes in the trophic structure of the southern Benguela before and after the onset of industrial fishing
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KE Watermeyer LJ Shannon CL GriffithsDespite a human presence in the Benguela region for at least one million years, exploitation of marine resources by European seafarers only began in earnest in the 1400s. Ecopath with Ecosim was used to construct and compare mass-balanced foodweb models... -
Changes in the trophic structure of the northern Benguela before and after the onset of industrial fishing
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KE Watermeyer LJ Shannon J-P Roux CL GriffithsExploitation of marine resources has been occurring in the northern Benguela ecosystem for centuries. Understanding the cumulative long-term effects of this exploitation is important toward effective management of the modern system. Retrospective mass-balanced models of the ecosystem have been constructed,... -
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... -
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)... -
Primary production in the Benguela ecosystem, 1999–2002
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Barlow T Lamont B Mitchell-Innes M Lucas S ThomallaPhytoplankton production was investigated throughout the whole Benguela ecosystem in winter 1999 and in summer 2002 during two four-week research cruises from Cape Town, South Africa, through Namibian waters to Namibe in southern Angola. Primary production ranged from 0.14–2.26 g... -
Effects of fishing on a temperate reef community in South Africa 1: ichthyofauna
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Götz --- , South Africa SE Kerwath --- Department of Environmental Affairs, South Africa CG Attwood --- Marine Research Institute, Department of Zoology, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South AfricaExploitation of temperate reef fish not only affects the target species but potentially changes the composition of reef fish assemblages. This study investigated the effect of fishing on the ichthyofaunal community at protected and exploited sites around the Goukamma Marine... -
Do inter-colony differences in Cape fur seal foraging behaviour reflect large-scale changes in the northern Benguela ecosystem?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Skern-Mauritzen --- , Norway SP Kirkman --- Animal Demography Unit, Department of Zoology, South Africa E Olsen --- , Norway A Bjørge --- , Norway L Drapeau --- , France MA Meÿer --- Department of Environmental Affairs, South Africa J-P Roux --- Ministry of Fisheries and Marine Resources, Namibia S Swanson --- Department of Environmental Affairs, South Africa WH Oosthuizen --- Department of Environmental Affairs, South AfricaThe northern Benguela ecosystem adjoining Namibia has undergone considerable changes in recent decades, with reductions and northwards shifts of key prey species that have had severe implications for marine top predator populations. We investigated how such environmental variability may impact... -
Design and calibration of an acoustic telemetry system subject to upwelling events
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Singh --- Department of Environmental Affairs, South Africa NJ Downey --- , South Africa MJ Roberts --- Department of Environmental Affairs, South Africa DM Webber --- , Canada MJ Smale --- , South Africa MA van den Berg --- Department of Environmental Affairs, South Africa RT Harding --- Department of Environmental Affairs, South Africa DC Engelbrecht --- , South Africa BM Blows --- , South AfricaThe experiments described were designed to calibrate a hexagonal array of VEMCO VR2 receivers and transmitters (model V9P-6L-S256) in isothermal and stratified water columns off the south coast of South Africa. The array, configured with 500 m between receivers, was... -
Syndromes of dryland degradation in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: RJ Scholes --- Natural Resources and the Environment, South AfricaDryland degradation (in other words, desertification) is defined for the purposes of this paper as a persistent decrease in the capacity of an arid or semiarid ecosystem to supply a range of services, including (but not restricted to) forage, fuel,... -
Functorial relationships between lattice-valued topology and topological systems
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: J.T. Denniston S.E. RodabaughThis paper investigates functorial relationships between lattice-valued topology (arising from fuzzy sets and fuzzy logic) and topological systems (arising from topological and localic aspects of domains and finite observational logic in computer science). Two such relationships are embeddings from TopSys... -
The ecology and management of the Miombo woodlands for sustainable livelihoods in southern Africa: the case for non-timber forest products
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: PW Chirwa S Syampungani CJ GeldenhuysThere is new and increasing emphasis on the contribution of non-timber forest products (NTFPs) to improving the livelihoods of rural communities and therefore the need for sustainable management of forest ecosystems of the Miombo woodlands to ensure the continued availability... -
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... -
Reproductive biology of Corymbia citriodora subsp. variegata and effective pollination across its native range in Queensland, Australia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: CFE Bacles J Brooks DJ Lee PM Schenk AJ Lowe A KremerThe spotted gum species complex represents a group of four eucalypt hardwood taxa that have a native range that spans the east coast of Australia, with a morphological cline from Victoria to northern Queensland. Of this group, Corymbia citriodora subsp... -
Advances in reproductive biology and seed production systems of Eucalyptus: the case of Eucalyptus globulus
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: BM Potts MH McGowen DR Williams S Suitor TH Jones PL Gore RE VaillancourtEucalyptus globulus is the main eucalypt species grown in Australian plantations. The focus on seedling deployment systems, coupled with exploitation of large, open-pollinated base populations for breeding purposes over the last two decades, has required a detailed understanding of the... -
Processes influencing the population dynamics and conservation of African penguins on Dyer Island, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Ludynia --- Marine Research Institute, Department of Biological Sciences, South Africa LJ Waller --- Western Cape Nature Conservation Board, South Africa RB Sherley --- Marine Research Institute, Department of Biological Sciences, South Africa F Abadi --- Animal Demography Unit, Department of Biological Sciences, South Africa Y Galada --- Marine Research Institute, Department of Biological Sciences, South Africa D Geldenhuys --- Western Cape Nature Conservation Board, South Africa RJM Crawford --- Animal Demography Unit, Department of Biological Sciences, South Africa LJ Shannon --- Marine Research Institute, Department of Biological Sciences, South Africa A Jarre --- Marine Research Institute, Department of Biological Sciences, South AfricaDyer Island, South Africa, supported the largest African penguin Spheniscus demersus colony in 1979 (22 655 breeding pairs), but population dynamics of the species have not followed the trends of adjacent colonies in years of high fish abundance or shifts... -
Salinity tolerance of the South African endemic amphipod Grandidierella lignorum (Amphipoda: Aoridae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NF Masikane --- School of Life Sciences, South Africa BK Newman --- Coastal Systems Research Group, Natural Resources and the Environment, South Africa UM Scharler --- School of Life Sciences, South AfricaThe endemic amphipod Grandidierella lignorum is an organism potentially suited to the toxicity testing of coastal water and sediment in South Africa. The ranges of salinity and temperature at which G. lignorum can be used for toxicity testing were investigated... -
Climate change impact on the limnology of Lake Kariba, Zambia–Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TS Mahere --- Department of Biological Sciences, Zimbabwe MZ Mtsambiwa --- University of Zimbabwe Lake Kariba Research Station, Zimbabwe PC Chifamba --- Department of Biological Sciences, Zimbabwe T Nhiwatiwa --- Department of Biological Sciences, ZimbabweThere is evidence that global warming is changing the thermal regimes of tropical lakes and this paper examines the impact of warming on the limnology of Lake Kariba. Between 1986 and 2011 the mean temperature of the lake rose by... -
The development of an expert system for arid rangeland management in central Namibia with emphasis on bush thickening
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: David Joubert --- Nature Conservation, Namibia Ibo Zimmermann --- Nature Conservation, Namibia Jens Fendler --- Nature Conservation, Namibia Heike Winschiers-Theophilus --- Nature Conservation, Namibia Friedrich P Graz --- Nature Conservation, Namibia Nico Smit --- Animal, Wildlife and Grassland Sciences, South Africa M Timm Hoffman --- Plant Conservation Unit, Botany Department, South AfricaAn online decision support system derived from research and expert knowledge was developed for arid rangeland management in central Namibia. The expert system emphasises the control of bush thickening and is divided into three forms of decisions: adaptive, reactive and... -
Neurophysiological foundations of organ electrodermal diagnostics, acupuncture, TENS and other reflexive therapies
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: JZ Szopinski --- Pain Clinic, South Africa T Sierak --- Department of Medical Biophysics, Poland GP Lochner --- Department of Electronic Engineering, South AfricaThe nervous system is the primary computing system of the human body. The sensory nervous system detects any damage done to the body from both outside and inside and sends the information, at the earliest stage of pathology, to the... -
Needleless Intravascular Access
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: A Milner --- Department of Anaesthesia, South AfricaHealthcare workers (HCWs) are at risk for needlestick injuries (NSIs), and in the modern context infections acquired in this manner may have life-threatening sequelae. -
Anaesthetic management of a patient with sick sinus syndrome for exploratory laparotomy
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: S Alex --- Department of Anaesthesiology, India JP Saneesh --- Department of Anaesthesiology, India R Rao --- Department of Anaesthesiology, India M Upadya --- Department of Anaesthesiology, IndiaSick sinus syndrome is a generalised abnormality of cardiac impulse formation that may be caused either by an intrinsic disease of the sinus node, which makes it unable to perform its pacemaking function, or by extrinsic factors. It commonly affects... -
Insertion of a temperature probe into the ProSeal® laryngeal mask airway drainage tube
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: M Singh --- Department of Anaesthesiology, India D Kapoor --- Department of Anaesthesiology, IndiaBackground: Temperature monitoring is one of the minimum mandatory monitoring standards of anaesthesiology. Intraoperative hypothermia and hyperthermia can both be detrimental for patients. We introduced a temperature probe into a Proseal® laryngeal mask airway (LMA) drainage tube, and measured patient... -
Myocardial ischaemia during coronary artery bypass graft surgery: a review of intervention strategies (Part 2)
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: P Motshabi --- Department of Anaesthesia, -
Effectiveness of low-dose midazolam plus ketamine in the prevention of shivering during spinal anaesthesia for emergency lower limb surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: K Misiran --- Department of Anaesthesiology and Intensive Care, Faculty of Medicine, Malaysia FZ Aziz --- Department of Anaesthesia and Intensive Care, MalaysiaObjective: This study was conducted to compare the effectiveness of two different dosages of intravenous midazolam in combination with ketamine in the prevention of shivering during spinal anaesthesia for emergency lower limb surgery. -
Myocardial ischaemia during coronary artery bypass graft surgery: a review of the pathophysiology (Part 1)
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: P Motshabi --- Department of Anaesthesia,Myocardial mortality and morbidity during cardiac surgery is a devastating emotional phenomenon for both the medical team and the patient's family, often leading to dire financial consequences. Multiorgan dysfunction as a result of the effects of the neurohumoral system, triggered... -
Audit of efficacy of Coartem™ to clear plasmodium falciparum malaria parasitaemia at single forty-two day follow-up
Item type: Journal Article • Journal: South African Family Practice • Authors: Williams CH Vaughan --- Mosvold Hospital, South Africa C La Cock --- KwaZulu-Natal Laboratory Services Stationed at Department of Health, BLF Bredenkamp --- Malaria Research Programme of Medical Research Council,Background: A follow-up study was undertaken to assess the efficacy of Coartem™ tablets (20 mg artemether and 120 mg lumefantrine—Novartis South Africa (Pty) Ltd) to clear plasmodium falciparum malaria parasitaemia at a single 42-day follow-up, with 42 days being chosen... -
Epidemiological profile of non-daily smokers in South Africa: implications for practice
Item type: Journal Article • Journal: South African Family Practice • Authors: OA Ayo-Yusuf --- Department of Community Dentistry and School of Health Systems and Public Health, B Szymanski --- School of Health Systems and Public Health,Background: This study sought to provide an epidemiological profile of non-daily (ND) smokers in South Africa. -
Nail changes in systemic diseases
Item type: Journal Article • Journal: South African Family Practice • Authors: MH Motswaledi --- Department of Dermatology, South Africa MC Mayayise --- Department of Internal Medicine, South AfricaDiscerning between actual nail conditions and nail changes associated with systemic disease is a very important and interesting part of any clinical examination. This article provides a helpful clinical atlas of nail changes that may be associated with systemic disease... -
Superficial skin infections and the use of topical and systemic antibiotics in general practice
Item type: Journal Article • Journal: South African Family Practice • Authors: MH Motswaledi --- Department of Dermatology,Superficial bacterial infections of the skin are very common. With the increasing burden of human immunodeficiency virus (HIV), this is likely to worsen. Examples of such infections include impetigo, erysipelas, cellulitis, ecthyma, furuncles, carbuncles and subcutaneous abscesses. Common causative organisms... -
Comparative study of the primary healthcare systems in China and Mali
Item type: Journal Article • Journal: South African Family Practice • Authors: S Fomba --- Master's candidate degree West China School of Public Health; Sichuan University, China M Xiao --- Master's candidate degree West China School of Public Health; Sichuan University, China Y Yang --- Master's candidate degree West China School of Public Health; Sichuan University, China H Zhou --- Master's candidate degree West China School of Public Health; Sichuan University, China Q Liu --- Master's candidate degree West China School of Public Health; Sichuan University, China L Yu --- Master's candidate degree West China School of Public Health; Sichuan University, ChinaBackground: Community health centres (CHCs) are an important component of the health system in Mali and China. Despite patient support and commitment from the authorities, the management and the quality of care of these structures need to be improved. This... -
Comprehensive approach to HIV/AIDS services: the way to go in resource-limited settings
Item type: Journal Article • Journal: South African Family Practice • Authors: A Adefolalu --- Department of Family Medicine, South AfricaThe response to the HIV/AIDS epidemic by the various health systems in sub-Saharan Africa, that has the highest prevalence of the disease, has been quite significant in recent years. Millions of people are now benefiting from the services rendered for... -
Strategies to improve blood pressure control and cardiovascular outcomes in hypertensive patients
Item type: Journal Article • Journal: South African Family Practice • Authors: E Van der Merwe A CarboniHypertension is a major contributor to cardiovascular morbidity and mortality. However, blood pressure control in clinical practice still falls short of treatment recommendations. The reasons for this are manifold, and patient non-compliance with medication has been identified as one important... -
Reflections on the development of family medicine in the Western Cape: a 15-year review
Item type: Journal Article • Journal: South African Family Practice • Authors: B Mash --- Family Medicine and Primary Care, Stellenbosch University,This article reviews how the model of family medicine has developed over the last 15 years in the Western Cape. It is based on a series of in-depth interviews with key role players. This period coincides with the immediate post-apartheid... -
The eye in systemic disease
Item type: Journal Article • Journal: South African Family Practice • Authors: M Lenake --- University of Cape Town; Groote Schuur Hospital, N Du Toit --- University of Cape Town; Groote Schuur Hospital,The eye is a unique organ which is often involved in systemic disease. Patients with systemic disease may first present with eye pathology, and patients with known systemic illnesses may need to have their eyes specifically checked for ocular complications... -
Sociodemographic and clinical profiles of suicidal patients requiring admission to hospitals south of Durban
Item type: Journal Article • Journal: South African Family Practice • Authors: SS Naidoo --- Department of Family Medicine, L Schlebusch --- Department of Behavioural Medicine,Background: Suicidal behaviour has become a major public health concern worldwide. Non-fatal suicidal attempts outnumber fatal episodes by wide-ranging figures across, and within, many countries. Approximately 6 500 suicides and 130 000 suicide attempts occur annually in South Africa, with... -
Microclimate conditions in ventilated wet-walled greenhouses in a subtropical climate: spatial variability
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael J Savage --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South AfricaSpatial variations of microclimatic conditions in enclosed north–south (N–S) oriented single-arched greenhouse polycarbonate structures, with a wet-wall providing evaporative cooling at the S end, were investigated and displayed online in near real-time. Temperature-controlled fans at the N end extracted air... -
On law and legality in post-apartheid South Africa: insights from a migrant street trader
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Jürgen Schraten --- The Human Economy Project, Faculty of Humanities, South AfricaThis article focuses on the experience of law and legality by a migrant street trader in post-apartheid South Africa. The experiences of this stall vendor are analysed alongside theoretical notions of law and the legal system. The ways that law... -
Just living: genealogic, honesty and the politics of apartheid time
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Kathleen Lorne McDougall --- Department of Anthropology, South Africa“We were just living,” I was told of growing up an Afrikaner as apartheid was born. Is it possible for living at this time to be anything but political? To say “we were just living” of being an Afrikaner at... -
What are the university–productive sector links that matter in a small island country? The case of Cabo Verde
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Alexandre O. Vera-Cruz --- Department of Economics and the Postgraduate Program in Economics and Innovation Management, MexicoThere is extensive literature on university–firm links but it is mostly based on empirical evidence from advanced countries, emerging economies and developing countries that already have certain capabilities of the public research system and an important set of mature firms... -
Promoting technology adoption in the small-scale oil palm fruit processing sector in south-western Nigeria: an innovation systems approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olawale O. Adejuwon --- African Institute for Science Policy and Innovation, Obafemi Awolowo University, Nigeria Kehinde A. Taiwo --- Department of Food Science and Technology, Nigeria Matthew O. Ilori --- African Institute for Science Policy and Innovation, Obafemi Awolowo University, NigeriaTechnologies have been developed for various unit operations in small-scale oil palm fruit processing in Nigeria. However, a majority of small-scale processors in the country still adopt traditional techniques, with a few adopting processing technologies for a particular stage in... -
Productivity and cost analysis of semi-mechanised and mechanised systems on the Viphya forest plantations in Malawi
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Elisha Ngulube --- Forest Postgraduate Programme, Plant Sciences Complex, South Africa Michal Brink --- Forest Postgraduate Programme, Plant Sciences Complex, South Africa Paxie W Chirwa --- Forest Postgraduate Programme, Plant Sciences Complex, South AfricaAt least 200 000 m3 of timber is harvested annually using semi-mechanised harvesting systems on the Viphya forest plantations in Malawi. Although these systems have long been used on the Viphya, no investigation on their productivity has so far been... -
Models for estimation of tree volume in the miombo woodlands of Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ernest W Mauya --- Department of Ecology and Natural Resource Management, Norway Wilson A Mugasha --- Department of Ecology and Natural Resource Management, Norway Eliakimu Zahabu --- Department of Forest Mensuration and Management, Tanzania Ole M Bollandsås --- Department of Ecology and Natural Resource Management, Norway Tron Eid --- Department of Ecology and Natural Resource Management, NorwayVolume of trees is an important parameter in forest management, but only volume models with limited geographical and tree size coverage have previously been developed for Tanzanian miombo woodlands. This study developed models for estimating total, merchantable stem and branches... -
Phenomenological and neurophysiologic investigation into contemplating umoya (Spirit) and its psychological applications
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Steve Edwards --- Psychology Department, South Africa Dumisani Nzima --- Psychology Department, South Africa Sumeshni Govender --- Psychology Department, South Africa Mandla Hlongwane --- Psychology Department, South Africa Dennis Kent --- Psychology Department, South Africa Caroll Hermann --- Psychology Department, South Africa Vusi Mathe --- Psychology Department, South Africa David Edwards --- Psychology Department, South AfricaThis study explored subjective and objective perspectives on uMoya, Spirit consciousness and/or spirituality, from a heuristic phenomenological and neurophysiologic perspective. Contemplative reflective data on uMoya and its neurophysiologic correlates were gathered from a culturally diverse group of eight researcher-participants aged... -
Changes in the trophic structure, abundance and species diversity of exploited fish assemblages in the artisanal fisheries of the northern coast, Senegal, West Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Ndour --- Institut Sénégalais de Recherches Agricoles [ISRA]/Centre de Recherche Océanographique de Dakar-Thiaroye [CRODT], Sénégal F Le Loc'h --- Institut de Recherche pour le Développement [IRD], Laboratoire des sciences de l'Environnement Marin [UMR 6539 LEMAR] (Centre national de la recherche scientifique [CNRS], France J Kantoussan --- Université Gaston Berger [UGB], Sénégal M Thiaw --- Institut Sénégalais de Recherches Agricoles [ISRA]/Centre de Recherche Océanographique de Dakar-Thiaroye [CRODT], Sénégal HD Diadhiou --- Institut Sénégalais de Recherches Agricoles [ISRA]/Centre de Recherche Océanographique de Dakar-Thiaroye [CRODT], Sénégal JM Ecoutin --- Institut de Recherche pour le Développement [IRD], Sénégal L Tito de Morais --- Institut de Recherche pour le Développement [IRD], Laboratoire des sciences de l'Environnement Marin [UMR 6539 LEMAR] (Centre national de la recherche scientifique [CNRS], France OT Thiaw --- L'Institut Universitaire de Pêche et d'Aquaculture [IUPA], SénégalThis work investigates the effects of changes in both fishing pressure and the environment on the trophic dynamics, abundance and diversity of species in the artisanal commercial fisheries off the northern coast of Senegal. Using artisanal commercial fishing data (provided... -
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... -
Assessment of the long-term response to rehabilitation of two wetlands in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Cowden --- GroundTruth CC, South Africa DC Kotze --- Centre for Water Resources Research, School of Environment, Agriculture and Earth Sciences, South Africa WN Ellery --- Geography Department, South Africa EJJ Sieben --- Department of Plant Sciences, South AfricaAssessing the ecological outcomes of wetland rehabilitation activities is an important need recognised by the ‘Working for Wetlands’ programme in South Africa. An assessment of ecological response was conducted in the Killarney and Kruisfontein wetlands, KwaZulu-Natal, in 2005 prior to... -
The effect of bacterial-based biofertilisers and cytokinin on the emergence of sunflower at non-limiting and supra-optimal temperatures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Andries A Nel --- Agricultural Research Council–Grain Crops Institute, South AfricaSubsurface sunflower (Helianthus annuus L.) seedling growth often deteriorates on sandy-textured soils due to supra-optimal temperature levels on the Highveld area of South Africa leading to poor emergence and suboptimum plant population densities. It has been shown that seedling growth... -
Innovation, the informal economy and development: The case of Zambia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ephraim Daka --- Innovation and Knowledge Economy, Finland Hannes Toivanen --- Innovation and Industrial Renewal, FinlandNational systems of innovation have been serving as the conceptual framework and vehicle to address poverty and national competitiveness in developing countries. Zambia has been building its NSI since 1964, but the existing system suffers from serious shortcomings related to... -
Computerised inventory management for a manufacturing industry: A case study in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Emmanuel Seye Owoeye --- Mechanical Engineering Department, Nigeria Samuel Babatope Adejuyigbe --- Mechanical Engineering Department, Nigeria Bukola Olalekan Bolaji --- Mechanical Engineering Department, Nigeria A.F. Adekoya --- Computer Science Department, NigeriaVarious authors have suggested that the cost of purchasing and holding inventory can account for as much as 60%–80% of the total cost of a product or service. Usually, only some of the inventory (about 10%) contributes to 70%–80% of... -
Comparative study on municipal solid waste management systems of Maputo City, Mozambique and Chongqing City, China
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Letícia Sarmento dos Muchangos --- Faculty of Urban Construction and Environmental Engineering, People's Republic of China Yuanyuan Liu --- Faculty of Urban Construction and Environmental Engineering, People's Republic of China Baizhan Li --- Faculty of Urban Construction and Environmental Engineering, People's Republic of ChinaThe Municipal Solid Waste Management (MSWM) system in Maputo City, Mozambique, presents several flaws and challenges mainly related to limited financial, human and material resources, as well as low public awareness and participation. This is a South–South comparison study between... -
The rise of the BRICS and resource nationalism: challenge and opportunity for Africa's innovation systems
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Michael Kahn --- Centre for Research on Evaluation, Science and Technology, South AfricaA new ‘scramble for Africa’ is presently underway. Unlike that of the late 19th century, this second scramble does not rely upon the capture of assets through extra-territorial force. This time around the capture is not overtly violent, being advanced... -
Mapping, measuring and managing African national systems of innovation for policy and development: the case of the Ghana national system of innovation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Frank L. Bartels --- Innov8 Policy Advisory Services Ltd, Austria Ritin Koria --- Vienna University of Technology, Institute of Management Science, AustriaThe systemic approach to innovation as key to economic development, in the context of the knowledge-based economy is increasingly evident and is of strategic value in terms of industrial and development policy (Bartels et al. 2012). The national system of... -
Inclusive innovation processes – experiences from Uganda and Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Lena Trojer --- Department of Technology and Aesthetics, Sweden Birgitta Rydhagen --- Department of Technology and Aesthetics, Sweden Tomas Kjellqvistt --- Department of Technology and Aesthetics, SwedenIt has been well known since the 1960s that developing countries need to improve their capacity to use science and technology and that more efforts must be put into R&D that would benefit poor countries and people. Serious efforts to... -
Performance appraisal systems — equity perceptions of mathematics teachers: an exploratory study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Michael Kainose Mhlolo --- Faculty of Education, South AfricaThis study investigated equity perceptions of a school based performance appraisal system in a subject discipline. Participants were 110 mathematics teachers (females = 10%) and 12 school principals (females = 25%). They completed a questionnaire on distributive, procedural and interactional justice regarding the performance... -
Integral approach to South African psychology with special reference to indigenous knowledge
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Stephen D Edwards --- Psychology Department, South AfricaIn order to redress imbalances in South African psychological service provision, honor indigenous, transpersonal, community based perspectives, and introduce fresh insights and direction, this article presents an integral approach to psychology in South Africa. Areas highlighted for future research and... -
Temporal and spatial variability in the abundance, biomass and distribution of Palaemon peringueyi (Decapoda: Crustacea) are influenced by biological but not physico-chemical factors in the permanently open Kariega Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NP Nyalungu --- South African National Parks, Cape Research Centre, South Africa AN Hodgson --- Department of Zoology and Entomology, South Africa PW Froneman --- Department of Zoology and Entomology, South Africa M Dopolo --- South African National Parks, Cape Research Centre, South Africa M Masubelele --- South African National Parks, Cape Research Centre, South AfricaBiological and physico-chemical factors affecting abundance and biomass of shrimp Palaemon peringueyi were investigated in 2010–2011 in the lower, middle and upper reaches of the freshwater-deprived permanently open Kariega Estuary. Shrimp abundance and biomass ranged from 0 to 88 ind... -
Patterns of chironomid body-size distribution in an effluent-impacted river in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ON Odume --- Unilever Centre for Environmental Water Quality, South Africa CG Palmer --- Unilever Centre for Environmental Water Quality, South Africa FO Arimoro --- Department of Biological Sciences, Nigeria PK Mensah --- Unilever Centre for Environmental Water Quality, South AfricaBody size is an important determinant of assemblage structure in rivers and streams impacted by elevated concentrations of pollutants such as salts and metals. In the present study, because of the larger surface-area-tovolume ratio of small-bodied chironomid species compared with... -
Spatial and seasonal patterns in sighting rate and life-history composition of the white shark Carcharodon carcharias at Mossel Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Ryklief --- Department of Zoology, South Africa PA Pistorius --- Department of Zoology, South Africa R Johnson --- Oceans Research, South AfricaWhite sharks Carcharodon carcharias aggregate at specific times of the year at localities along the South African coast. At Mossel Bay, on the southern Cape coast, four sites were sampled (Seal Island, Hartenbos, Kleinbrak and Grootbrak) to investigate spatial and... -
Home range and diving behaviour of Heaviside's dolphins monitored by satellite off the west coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RW Davis --- Department of Marine Biology, USA JHM David --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa MA Meÿer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa K Sekiguchi --- International Christian University, Japan PB Best --- Mammal Research Institute, South Africa M Dassis --- Instituto de Investigaciones Marinas y Costeras, Facultad de Ciencias Exactas y Naturales, Argentina DH Rodríguez --- Instituto de Investigaciones Marinas y Costeras, Facultad de Ciencias Exactas y Naturales, ArgentinaThree Heaviside's dolphins Cephalorhynchus heavisidii were fitted with satellite depth recorders off the west coast of South Africa during February–April 1997 and monitored for 51, 73 and 130 days, respectively. In total, 345 locations were received from the three animals,... -
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... -
Decline of Terebralia palustris in South African mangroves
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JL Raw --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa R Perissinotto --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa RH Taylor --- School of Hydrology, South Africa NAF Miranda --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa N Peer --- DST/NRF Research Chair in Shallow Water Ecosystems, South AfricaTerebralia palustris (Linnaeus, 1767), the giant mangrove whelk, is a prominent component of mangrove ecosystem malacofauna in the Indo-West-Pacific region. On the east coast of Africa, the range of T. palustris extends from Kenya to the south-eastern region of South... -
Topological systems versus attachment relations
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Cosimo Guido --- Department of Mathematics “Ennio De Giorgi”, Italy Sergey A. Solovyov --- Department of Mathematics and Statistics, Faculty of Science, Czech RepublicThe manuscript makes a category-theoretic comparison between the concepts of topological system of S. Vickers and attachment relation of C. Guido. With the help of the recent definition of the notions in the framework of an arbitrary variety of algebras,... -
Determining input values for a simple parametric model to estimate evaporation from vineyard soils with special reference to clay content and trellis system
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Philip A Myburgh --- Agricultural Research Council Infruitec-Nietvoorbij, South AfricaEstimating soil evaporation (Es) is an important part of modelling vineyard evapotranspiration for irrigation purposes. Furthermore, quantification of possible soil texture and trellis effects is essential. Daily Es from six topsoils packed into lysimeters was measured under grapevines on slanting... -
Small-scale rice irrigation technology in southern Ghana: the challenges for sustainable uptake
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Junji Koide --- Graduate School of Life and Environmental Sciences, Japan Misa Masuda --- Faculty of Life and Environmental Sciences, JapanPromotion of small-scale irrigation in rain-fed rice lowlands is reckoned a key strategy for filling the escalating gap between rice supply and demand in sub-Saharan Africa. Though studies acknowledged the farmer-centred nature of small-scale rice irrigation technology, along with its... -
An innovative drought early warning system for sub-Saharan Africa: integrating modern and indigenous approaches
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Muthoni Masinde --- Department of Information Technology, South AfricaDroughts remain the number one disaster in Africa; drought is responsible for over 88% of all the types of disasters that people are affected by. An effective drought early warning system can support appropriate mitigation and preparedness strategies and hence... -
Efficiency of Mexico's regional innovation systems: an evaluation applying data envelopment analysis (DEA)
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Cuitláhuac Valdez Lafarga --- Student in Doctoral Programme, Mexico Jorge Inés León Balderrama --- Regional Development Department, MexicoThe aim of this study is to measure the relative technical efficiency of Mexico´s regional innovation systems, as defined by its 32 states. Furthermore, there is an interest to establish the relationship between the amount of resources for each regional... -
Indigenous knowledge systems – a rich appropriate technology resource
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: John Tharakan --- Department of Chemical Engineering, United States of AmericaIndigenous knowledge systems (IKS) comprise knowledge systems that have developed within various societies’ independent of, and prior to, the advent of the modern scientific knowledge system. IKS from various cultures evolved into broad and comprehensive knowledge systems, such as those... -
Acacia plantations in Vietnam: research and knowledge application to secure a sustainable future
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: EK Sadanandan Nambiar --- CSIRO Land and Water Flagship, Black Mountain Laboratories, Australia Christopher E Harwood --- CSIRO Land and Water Flagship, Australia Nguyen Duc Kien --- Vietnamese Academy of Forest Sciences, VietnamVietnam has established 1.1 million ha of acacia plantations for wood production, managed on 5- to 10-year rotation cycles. Nearly 50% of the resource is managed by small growers holding 1–5 ha woodlots. Acacia plantations have emerged as an important... -
First report of an Anabaena Bory strain containing microcystin-LR in a freshwater body in Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PJ Oberholster --- CSIR Natural Resources and the Environment, South Africa S Jappie --- Department of Genetics, South Africa PH Cheng --- CSIR Natural Resources and the Environment, South Africa AM Botha --- Department of Genetics, South Africa MW Matthews --- Marine Remote Sensing Unit, South AfricaIn South Africa, little is known about the production of microcystin by the genus Anabaena Bory. In April 2012, during a cyanobacterial bloom event in Theewaterskloof Dam, Western Cape province, the plankton was sampled on 10 occasions. The dominant algae... -
A new genus and species of Ceratocanthidae from Tanzania (Coleoptera: Scarabaeoidea)
Item type: Journal Article • Journal: African Zoology • Authors: Alberto Ballerio --- Viale Venezia 45, I-25123 Brescia, ItalyCryptophilharmostes mahunkai n.gen., n.sp., a remarkable Ceratocanthidae (Coleoptera: Scarabaeoidea) from the Usambara Mountains (Tanzania), is described. The morphology of the clypeus and mesoepisternum is discussed, also with reference to other Ceratocanthidae. The affinities of the genus are discussed, and within... -
Phylogenetic relationships in the genus Aethomys (Rodentia: Muridae)
Item type: Journal Article • Journal: African Zoology • Authors: C.T. Chimimba --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaPhylogenetic relationships in the genus Aethomys were examined based on qualitative cranial data for all currently recognized species. A cladistic analysis suggested the presence of three clades: 1) A. bocagei, A. thomasi, A. silindensis, A. kaiseri, and A. nyikae;2) A... -
The influence of selected environmental parameters on the distribution of the dominant demersal fishes in the Kariega Estuary channel, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Naomi Richardson --- Department of Ichthyology and Fisheries Science, South Africa Alan K. Whitfield --- South African Institute for Aquatic Biodiversity, South Africa Angus W. Paterson --- South African Institute for Aquatic Biodiversity, South AfricaThe Kariega Estuary channel was sampled using an otter trawl and the demersal fish catch analysed using the PRIMER statistical package. A biological-environmental (BIOENV) analysis was undertaken using the catch per unit effort ichthyofaunal data from the spring/summer period of... -
Thermoregulation under semi-natural conditions in speckled mousebirds: the role of communal roosting
Item type: Journal Article • Journal: African Zoology • Authors: Andrew E. McKechnie --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South Africa Gerhard Körtner --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South Africa Barry G. Lovegrove --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South AfricaMousebirds (Coliiformes) exhibit well-developed communal roosting behaviour as well as a pronounced capacity for facultative hypothermic responses. We recorded body temperature (Tb)) in speckled mousebirds (Colius striatus) under semi-natural conditions in outdoor aviaries, and examined interactions between behavioural and metabolic... -
Sexual disparity in activity patterns and time budgets of angulate tortoises (Chersina angulata) on Dassen Island, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Toby Keswick --- Department of Biodiversity and Conservation Biology, South Africa Brian T. Henen --- Department of Biodiversity and Conservation Biology, South Africa Margaretha D. Hofmeyr --- Department of Biodiversity and Conservation Biology, South AfricaBehavioural frequencies and time budgets for male and female Chersina angulata were recorded in spring, September 2004. The daily activity of the population was 10.51 ± 0.42 h (mean ± CI), but individual males and females were in the open... -
The incidence of torpor in winter and summer in the Angolan free-tailed bat, Mops condylurus (Microchiroptera: Molossidae), in a subtropical environment, Mpumulanga, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: L. Vivier --- Zoology Department, South Africa M. van der Merwe --- Department of Zoology and Entomology, South AfricaThe incidence of torpor during summer and winter in response to cold exposure in Mops condylurus was studied in a subtropical environment. Body temperature changes under natural roosting conditions during winter and summer were monitored using bats fitted with temperature-sensitive... -
Basking behaviour in the rock hyrax (Procavia capensis) during winter
Item type: Journal Article • Journal: African Zoology • Authors: Kelly J. Brown --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South Africa Colleen T. Downs --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South AfricaBasking is a behaviour frequently observed in the rock hyrax (Procavia capensis) during winter that supposedly plays a significant role in rewarming from nocturnal hypothermia. This behaviour, together with changes in body temperature and changes in black bulb temperatures (Tbb)... -
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... -
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... -
Effects of temperature and salinity on resting metabolism in two South African rock pool fish: the resident gobiid Caffrogobius caffer and the transient sparid Diplodus sargus capensis
Item type: Journal Article • Journal: African Zoology • Authors: J. O. G. Kemp [AN0001]Intertidal rock pools are inherently dynamic environments that experience marked changes in physico-chemical parameters over diel, tidal and seasonal time scales. Fish that inhabit the intertidal zone can generally be characterized as either permanent residents or transients/visitors. This study investigates... -
Comparative analysis of long-range calls in equid stallions (Equidae): are acoustic parameters related to social organization?
Item type: Journal Article • Journal: African Zoology • Authors: Richard Policht --- Institute of Tropics and Subtropics, Czech University of Life Sciences Prague, Czech Republic Alexis Karadžos --- Department of Zoology, Faculty of Science, Czech Republic Daniel Frynta --- Department of Zoology, Faculty of Science, Czech RepublicEvolution of long-distance communication in equids may correspond with species-specific types of social organization. To compare harem-forming species (type I) with those that do not establish permanent social units (type II), we conducted a comparative analysis of stallion long-range calls... -
Marine connectivity and fish length frequencies of selected species in two adjacent temporarily open/closed estuaries in the Eastern Cape Province, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Poogendri Reddy --- South African Institute for Aquatic Biodiversity, South Africa Nicola C. James --- South African Institute for Aquatic Biodiversity, South Africa Alan K. Whitfield --- South African Institute for Aquatic Biodiversity, South Africa Paul D. Cowley --- South African Institute for Aquatic Biodiversity, South AfricaThe effects of timing, frequency and duration of mouth opening and marine overwash events on fish assemblages in two, adjacent temporarily open/closed estuaries were investigated. Sampling was conducted biannually over two years during summer and winter, using selective sampling gear... -
Exploring the diversity and molecular evolution of shrews (family Soricidae) using mtDNA cytochrome b data
Item type: Journal Article • Journal: African Zoology • Authors: Sandi Willows-Munro --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa Conrad A. Matthee --- Evolutionary Genomics Group, Department of Botany and Zoology, South AfricaThe taxonomy of the shrews (family Soricidae) is primarily underpinned by the analysis of morphology characters. These morphological characters are, however, often plesiomorphic and difficult to interpret in an evolutionarily meaningful way. Recent molecular studies have provided some clarity at... -
Aardvark burrows: a potential resource for animals in arid and semi-arid environments
Item type: Journal Article • Journal: African Zoology • Authors: G.M. Whittington-Jones --- Wildlife and Reserve Management Research Group, Department of Zoology and Entomology, South Africa R.T.F. Bernard --- Wildlife and Reserve Management Research Group, Department of Zoology and Entomology, South Africa D.M. Parker --- Wildlife and Reserve Management Research Group, Department of Zoology and Entomology, South AfricaArid and semi-arid environments are characterized by extreme fluctuations in temperature and low rainfall, which present significant challenges to the animals inhabiting these areas. However, the presence of burrows may allow animals to avoid climatic extremes and predators and may... -
The influence of fire on rodent abundance at the N’washitshumbe enclosure site, Kruger National Park, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: D.N. MacFadyen --- Mammal Research Institute, Department of Zoology and Entomology, South Africa N.L. Avenant --- Department of Mammalogy, South Africa M. van der Merwe --- Mammal Research Institute, Department of Zoology and Entomology, South Africa G.J. Bredenkamp --- Department of Plant Sciences, South AfricaThe relative population numbers of rodents were studied in nine habitats in and outside the N’washitshumbe enclosure site, Kruger National Park, before and after burning the firebreaks that surround the enclosure. Trap success was exceptionally high, and the field work... -
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... -
Environmental conditions during mass mortalities of the ascidian Pyura stolonifera (Heller) in the Tsitsikamma Marine Protected area
Item type: Journal Article • Journal: African Zoology • Authors: Nicholas Hanekom --- South African National Parks, South AfricaMass mortalities of the ascidian Pyura stolonifera occurred along the Tsitsikamma coast in May 1991 and again in February 2012, following infection of large proportions of the population with a white microbial growth. P. stolonifera appeared to be the only... -
No effects of huddling on core body temperature in rock hyrax, Procavia capensis
Item type: Journal Article • Journal: African Zoology • Authors: C. T. Downs --- University of KwaZulu-Natal, South Africa K. Wimberger --- University of KwaZulu-Natal, South Africa A. L. Wilson --- University of KwaZulu-Natal, South AfricaHuddling is a behavioural energy conservation mechanism that is widely used by many small endotherms at low ambient temperatures. Huddling has many benefits, including decreasing the metabolic cost of maintaining body temperature (Tb), reducing the amount of heat lost to... -
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... -
Roost temperature and fidelity of Wahlberg’s epauletted fruit bat, Epomophorus wahlbergi, in an urban environment
Item type: Journal Article • Journal: African Zoology • Authors: Dominic P. Rollinson --- School of Life Sciences, University of KwaZulu-Natal, South Africa Joy C. Coleman --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T. Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaGenerally,Wahlberg’s epauletted fruit bat (Epomophorus wahlbergi) roost in trees or under the eaves of buildings. This study investigated the roosting dynamics of E. wahlbergi in the urban environment of Pietermaritzburg, South Africa. To determine roost fidelity bats were radiotracked to... -
An exploratory investigation of the fish communities associated with reefs on the central Agulhas Bank, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Albrecht Götz --- Elwandle Node, South African Environmental Observation Network (SAEON), South Africa Sven E. Kerwath --- Fisheries Research, Department of Agriculture, South Africa Toufiek Samaai --- Department of Environmental Affairs, South Africa Charlene da Silva --- Fisheries Research, Department of Agriculture, South Africa Christopher G. Wilke --- Fisheries Research, Department of Agriculture, South AfricaDespite their ecological and economic importance, the temperate reef habitats of the central Agulhas Bank remain poorly studied. From 2008 to 2010, multiple stations grouped into six general sites of varying depth, profile and distance offshore, were surveyed. A combination... -
Home range, habitat selection and activity patterns of an arid-zone population of Temminck’s ground pangolins, Smutsia temminckii
Item type: Journal Article • Journal: African Zoology • Authors: Darren W. Pietersen --- Mammal Research Institute, Department of Zoology and Entomology, South Africa Andrew E. McKechnie --- Mammal Research Institute, Department of Zoology and Entomology, South Africa Raymond Jansen --- Department of Environmental, South AfricaAll previous behavioural studies of Temminck’s ground pangolins (Smutsia temminckii) have focused on populations in mesic regions. We examined home range size, activity periods, habitat selectivity and refuge site selection of 13 individuals over three years in the Kalahari Desert... -
High population connectivity and Pleistocene range expansion in the direct-developing plough shell Bullia rhodostoma along the South African coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Muteveri --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa CA Matthee --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa RCK Bowie --- Museum of Vertebrate Zoology and Department of Integrative Biology, USA S von der Heyden --- Evolutionary Genomics Group, Department of Botany and Zoology, South AfricaPleistocene climatic and oceanographic changes have influenced the distribution of marine biodiversity in southern Africa. Most evidence, however, has been derived from rocky shore or demersal taxa; data on sandy shore species are limited, despite severe threats to many sandy... -
Ecosystem modelling in the southern Benguela: comparisons of Atlantis, Ecopath with Ecosim, and OSMOSE under fishing scenarios
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MD Smith --- Department of Zoology, Australia EA Fulton --- CSIRO [Commonwealth Scientific and Industrial Research Organisation], Australia RW Day --- Department of Zoology, Australia LJ Shannon --- Marine Research Institute and Department of Biological Sciences, South Africa Y-J Shin --- Marine Research Institute and Department of Biological Sciences, South AfricaEcosystem-based management of marine fisheries requires the use of simulation modelling to investigate the system-level impact of candidate fisheries management strategies. However, testing of fundamental assumptions such as system structure or process formulations is rarely done. In this study, we... -
The Challenge of Management Scholarship in Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Constant D. Beugré --- College of Business, USAIn her speech marking the opening of the second biannual meeting of the Africa Academy of Management (AFAM) in Gabarone, Bostwana, in January 2014, the Honorable Linah K. Mohohlo, Governor of the Bank of Bostwana, raised three important issues that... -
Structural traits of elephant grass (Pennisetum purpureum Schum.) genotypes under rotational stocking strategies
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Carlos AM Gomide --- Embrapa Gado de Leite, Brazil Carla S Chaves --- Universidade Federal dos Vales do Jequitinhonha e Mucuri, Brazil Karina G Ribeiro --- Universidade Federal de Viçosa, Brazil Lynn E Sollenberger --- University of Florida, USA Domingos SC Paciullo --- Embrapa Gado de Leite, Brazil Tatiana P Pereira --- Universidade Federal Rural do Rio de Janeiro, Brazil Mirton JF Morenz --- Embrapa Gado de Leite, BrazilDespite the forage potential of elephant grass, controlling canopy structure during grazing has limited its use in pasture. This study was conducted to determine the effect of grazing frequency and post-grazing height on canopy structural characteristics of elephant grass genotypes... -
Solving the challenges of monitoring mobile populations: insights from studies of waterbirds in southern Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Hannah L Thomas --- Percy FitzPatrick Institute, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- Percy FitzPatrick Institute, DST–NRF Centre of Excellence, South Africa Graeme S Cumming --- Percy FitzPatrick Institute, DST–NRF Centre of Excellence, South AfricaHighly mobile species are difficult to monitor. It is often unclear from abundance estimates whether a population is genuinely declining or simply elsewhere. If the spatial and temporal scales of monitoring are inadequate, the data will only be useful if... -
Population metrics for fynbos birds, South Africa: densities, and detection and capture rates from a Mediterranean-type ecosystem
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Alan TK Lee --- Kirstenbosch Research Centre, South African National Biodiversity Institute, South Africa Phoebe Barnard --- Kirstenbosch Research Centre, South African National Biodiversity Institute, South Africa Philip AR Hockey --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaEstimates of bird numbers through quantification of density and range sizes are necessary for decisions regarding conservation status, yet counts of birds are often confounded by uncertainty of detection. The status of the endemic birds of the Fynbos biome is... -
Food abundance explains the breeding season of a tropical shorebird, the Crab Plover Dromas ardeola
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Giuseppe De Marchi --- Dipartimento di Scienze della Terra e dell'Ambiente, Italy Giorgio Chiozzi --- Museo Civico di Storia Naturale, Italy Dawit Semere --- Research Division, Eritrea Yohannes Mebrahtu --- Research Division, Eritrea Farhad Hosseini Tayefeh --- Department of the Environment Provincial Office, Iran Mohammed Almalki --- Department of Biology, College of Science, Kingdom of Saudi Arabia Mauro Fasola --- Dipartimento di Scienze della Terra e dell'Ambiente, ItalyThe timing of breeding in birds is a life-history trait that generally depends on food availability, but other factors may play a role, particularly in tropical areas where food availability is less seasonal than in temperate or polar areas. We... -
The impact of high temperatures on foraging behaviour and body condition in the Western Australian Magpie Cracticus tibicen dorsalis
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Emily K Edwards --- School of Animal Biology, Australia Nicola J Mitchell --- School of Animal Biology, Australia Amanda R Ridley --- Centre for Evolutionary Biology, School of Animal Biology, AustraliaHigh temperatures can pose significant thermoregulation challenges for endotherms, and determining how individual species respond to high temperatures will be important for predicting the impact of global warming on wild populations. Animals can adjust their behaviour or physiology to cope... -
A tool for identifying potential Eucalyptus nitens seed orchard sites based on climate and topography
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ilaria Germishuizen --- Institute for Commercial Forestry Research, South Africa Robin AW Gardner --- Institute for Commercial Forestry Research, South AfricaShy seed production in orchards of Eucalyptus nitens is a major barrier to the deployment of genetic gain in South African plantations. A machine learning method was used to identify optimal sites for the establishment of E. nitens seed orchards... -
Company-specific characteristics affecting oil and gas reserves disclosure in the United Kingdom
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Wilson Uchenna Ani --- Department of Banking and Finance, Nigeria Philip Obialor --- Coxswain Social Investment Plus (CSI+) (Consultants), Nigeria Odo Cosmas --- Department of Marketing, Nigeria David Okelue Ugwunta --- Department of Banking and Finance, NigeriaThis paper investigates company-specific characteristics affecting oil and gas reserves disclosure in the United Kingdom. Using a sample selected through purposive and stratified random sampling from 83 UK oil and gas exploration and production companies listed on the London Stock... -
Contribution of innovation intermediaries in agricultural innovation: the case of agricultural R&D in Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Athman H. Mgumia --- Tanzania Commission of Science and Technology, Directorate of Innovation, Tanzania Amon Z. Mattee --- Sokoine University of Agriculture, TANZANIA Beatus A.T. Kundi --- Department of Mechanical and Industrial Engineering, TanzaniaWith the current global economic reforms and advances in science, the move has been towards privatisation of the agricultural knowledge infrastructure. However, inadequate capacity of agricultural entrepreneurs and the diversity in the characteristics of the agricultural technologies have created market... -
Characteristics of agriculture technology and application of an agricultural innovation system in Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Athman H. Mgumia --- Tanzania Commission for Science and Technology (COSTECH), Dar es Salaam, Tanzania Amon Z. Mattee --- Department of Agricultural Education and Extension, Tanzania Beatus A.T Kundi --- Department of Mechanical & Industrial Engineering, College of Engineering & Technology (COeT), TanzaniaThe globalisation of the world economy and advancements in science, including the use of biotechnology for agricultural production has subjected agricultural technologies to market forces for their generation and dissemination. It is evident, however, that while some technologies are more... -
Some evidence on the stability of beta coefficients on the JSE
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: D C Bowie --- Quantitative Consultant at The WM Company, Scotland D J Bradfield --- Department of Statistical Sciences,Knowledge of beta stability is crucial for projections involving the use of beta coefficients, in particular, in the areas of project evaluation and portfolio design. This paper investigates the issue of beta stability on the JSE. The investigation reveals how... -
Value added reporting in South Africa: current disclosure patterns
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: L J Stainbank --- Department of Accounting,The value added statement has become a recognised part of annual reports in South Africa despite the fact that no guidance has been provided to the preparers of the value added statement other than The corporate report (ICAEW, 1975) which... -
Extraordinary items: Accounting and market risk
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: J A Miller --- Emeritus Professor in Accounting and Finance,The market reaction to the recurrent reporting of extraordinary items was tested by calculating and comparing the betas for a portfolio of shares that reported extraordinary items in each of the five years 1990 through 1994 and a control portfolio... -
Financial Information Systems: Teaching REA semantics within an Information Engineering framework
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: J. Callaghan --- Professor of Accounting, School of Business Administration, United States of America A. Savage --- Assistant Professor of Accounting, School of Business Administration, United States of America E. Peacock --- Professor of Accounting, School of Business Administration, United States of AmericaThe purpose of this paper is to describe how the accounting REA model can be incorporated into the Information Engineering set of methodologies in the Accounting or Financial Information Systems classroom. We contrast the traditional Information Engineering approach with one... -
The effect on taxpayers of new tax legislation regarding foreign exchange transactions
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: R Oberholzer --- Department of Taxation, J S Wilcocks --- School of Applied Accountancy,Numerous problems have been encountered with the practical application of the new taxation legislation relating to foreign currency transactions. The purpose of this paper is to analyse the amendments relating to foreign exchange transactions and to illustrate, by using examples,... -
The use and perceived usefulness of IAS 29 restated financial statements by Zimbabwean investment analysts
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: E Chamisa --- Department of Accounting,International Accounting Standard 29 (IAS 29) (Financial Reporting in Hyperinflationary Economies) asserts that, in a hyperinflationary economy, financial statements “are useful only if they are expressed in terms of the measuring unit current at the balance sheet date” (International Accounting... -
Characteristics of companies with a higher risk of financial statement fraud: A survey of the literature
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: E. du Toit --- Department of Financial Management,Fraud and corruption in companies is a serious problem in this day and age. One only needs to think of Enron, Parmalat and Macmed. Companies are constantly identifying new and ingenious ways to defraud their customers, investors, the government and... -
The effects of IFRS adoption: A review of the early evidence
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: M Negash --- School of Accountancy,This review documents the conceptual, methodological and policy issues that relate to the domain of financial reporting research that attempts to examine whether there are measurable gains, (if any) stemming from the adoption of international financial reporting standards, (IFRS). It... -
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... -
Basic Financial Statements: Objectives, Categories, Principles and Presentation
Item type: Journal Article • Journal: De Ratione • Authors: J.A. Miller --- University of Natal,Objectives ae suggested for each of the basic financial statements in the annual report of a business entity. Categories of information required and the principles used in their classification, are identified and defined. A suggested presentation reflects cash flow alongside... -
Computer-based Message System Flows in Large Organisations
Item type: Journal Article • Journal: De Ratione • Authors: B R Lower --- University of Cape Town, S Erlank --- University of Cape Town, P M Q Lay --- University of Cape Town,The structure of a typical organization can be described in terms of hierarchies and work groups, linked by blows of control and information. Communication between and within these work groups takes place in formal and informal ways, using a variety... -
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... -
Accounting Issues Task Force
Item type: Journal Article • Journal: De Ratione • Authors: G K Everingham --- University of Cape Town,This article reviews the authority of the recently constituted Accounting Issues Task Force in relation to the development of generally accepted accounting practice (GAAP) in South Africa, The Task Force’s first opinion, AC301, deals with the accounting treatment of taxation... -
Value added reporting in South Africa
Item type: Journal Article • Journal: De Ratione • Authors: L.J. Stainbank --- University of Natal – Pietermaritzburg,The major purpose of this article is to report the results of a questionnaire survey of the opinions of the preparers of value added statements on the preparation thereof and to identify group practice in their preparation. The opinions of... -
A critical analysis of the new definition of the holding-subsidiary relationship
Item type: Journal Article • Journal: De Ratione • Authors: G K Everingham --- University of Cape Town, R D Jooste --- University of Cape Town,This article reviews the new definition of the holding-subsidiary relationship, introduced by amendment in 1992 in South Africa into the Companies Act of 1973. It traces the efforts of the legislature, influenced by developments in the United Kingdom, to produce... -
Risk on The Johannesburg Stock Exchange
Item type: Journal Article • Journal: De Ratione • Authors: Mike Ward --- Lecturer in Finance and Quantitative Methods Faculty of Management,The Capital Asset Pricing Model (CAPM) provides a parsimonious method for estimating security returns. However, the strong influence of mining shares on the Johannesburg Stock Exchange (JSE) has complicated the use of the CAPM in South Africa and some researchers... -
Participation schemes in the South African Mining Industry: The impact of managerial accounting, communication and control systems
Item type: Journal Article • Journal: De Ratione • Authors: Jeremy Lord --- Department of Accounting at the University of Natal,The relationships between employees’ job satisfaction and their perceived extent of participation in profits, and budget-setting and other job-related decision-making, were examined in a profitable South African mining company. Using the statistical technique of Moderated Multiple Regression, it was established... -
Spatio-temporal variability of five surface water quality parameters in the Swartvlei estuarine lake system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IA Russell --- South African National Parks, South AfricaVariability of salinity, temperature, pH, dissolved oxygen and turbidity in the temporarily open/closed Swartvlei estuarine system, measured from 1991 to 2013, was investigated at various temporal (seasonal, estuarine open/closed phase, long-term) and spatial (inter- and intra-waterbody) scales. Longitudinal pH and... -
Influence of climate variables on Cyperus papyrus stomatal conductance in Lubigi wetland, Kampala, Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Opio --- Department of Biology, Uganda MB Jones --- Department of Botany, Ireland F Kansiime --- Department of Environmental Management, Uganda T Otiti --- Department of Physics, UgandaCyperus papyrus forms highly productive wetlands in tropical Africa, but the environmental control of transpirational water loss in wetlands is poorly understood. The influence of climate variables on papyrus stomatal conductance in dry and wet seasons of the year was... -
Southern African pasture and forage science entering the 21st century: past to present
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Wayne F Truter --- Department of Plant Production and Soil Science, South Africa Philip R Botha --- Directorate Plant Sciences, Western Cape Department of Agriculture, South Africa Chris S Dannhauser --- Grass SA, Waverley, South Africa Barbara V Maasdorp --- Department of Crop Science, Zimbabwe Neil Miles --- South African Sugarcane Research Institute, South Africa Albert Smith --- Stats4science, South Africa Hennie A Snyman --- Department of Animal, Wildlife and Grassland Sciences, South Africa Neil M Tainton --- Amber Valley, South AfricaGiven the global challenges of mitigating and alleviating land degradation and ensuring food security, particularly through protein production, pasture and forage science together with rangeland science will remain imperative to sustainable livestock production systems. Recognising the scientific principles developed in... -
Unmasking depression in persons attempting suicide
Item type: Journal Article • Journal: South African Family Practice • Authors: Soornarain S Naidoo --- College of Health Sciences, South Africa Uvistra Naidoo --- College of Health Sciences, South Africa Ashantha Naidoo --- College of Health Sciences, South AfricaBackground: Suicidal behaviour is highly prevalent and increasing at an alarming rate among all socio-demographic groupings in South Africa. Approximately 9.5% of all unnatural deaths in young people in South Africa are due to suicide. The ratio of non-fatal suicide... -
An evaluation of factors underlying suicide attempts in patients presenting at George Hospital emergency centre
Item type: Journal Article • Journal: South African Family Practice • Authors: L Raubenheimer --- Division of Family Medicine and Primary Care, South Africa LS Jenkins --- Division of Family Medicine and Primary Care, South AfricaBackground: Roughly 130 patients are seen daily in the emergency centre (EC) at George Provincial Hospital (GPH), of whom one or two will have attempted suicide. GPH serves the population of Eden and Central Karoo Districts. Little is known about... -
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... -
Pathology of eyes and brain of fish infected with diplostomids, southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Andri Grobbelaar --- Department Zoology and Entomology, University of the Free State, South Africa Liesl L van As --- Department Zoology and Entomology, University of the Free State, South Africa Jo G van As --- Department Zoology and Entomology, University of the Free State, South Africa Hennie JB Butler --- Department Zoology and Entomology, University of the Free State, South AfricaOnly a few reports exist on diplostomid metacercariae found in southern African fish and even less information is available on the pathology associated with these infections. During surveys conducted in December 2008 and August 2010, different fish species were collected... -
The application of the agricultural innovation system approach in technology development in Tanzania: researchers' perceptions and practices
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Athman H. Mgumia --- Tanzania Commission for Science and Technology, Tanzania Amon Z. Mattee --- Department of Agricultural Education and Extension, Tanzania Beatus A.T. Kundi --- Department of Mechanical & Industrial Engineering, TanzaniaThis paper examines the perceptions of researchers towards features of the innovation system approach. It also examines the extent of incorporation of these features into Tanzania's existing National Agricultural Research System (NARS). Both qualitative and quantitative data were collected from... -
Knowledge of Livestock Grading and Market Participation among Small Ruminant Producers in Northern Somalia
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: F. Wanyoike --- International Livestock Research Institute (ILRI), Kenya N. Mtimet --- International Livestock Research Institute (ILRI), Kenya N. Ndiwa --- International Livestock Research Institute (ILRI), Kenya K. Marshall --- International Livestock Research Institute (ILRI), Kenya L. Godiah --- Terra Nuova, Kenya A. Warsame --- IGAD Sheikh Technical Veterinary School (ISTVS), SomalilandThis study focused on market participation and producers’ knowledge of the indigenous livestock grading and pricing system applied to small ruminant marketing in Somaliland. Data were collected from a random sample of 144 men and women producers in three livelihood... -
Homecoming of Brachiaria: Improved Hybrids Prove Useful for African Animal Agriculture
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: B. L. Maass --- International Center for Tropical Agriculture (CIAT), Kenya C. A. O. Midega --- African Insect Science for Food and Health, (ICIPE), Kenya M. Mutimura --- Rwanda Agriculture Board (RAB), Rwanda V. B. Rahetlah --- Centre de Développement Rural et de Recherche Appliquée, Madagascar P. Salgado --- Mediterranean and Tropical Livestock Systems, CIRAD, UMR SELMET, Madagascar J. M. Kabirizi --- National Livestock Resources Research Institute (NaLIRRI), Uganda Z. R. Khan --- African Insect Science for Food and Health, (ICIPE), Kenya S. R. Ghimire --- Biosciences Eastern and Central Africa (BecA)-ILRI Hub, Kenya I. M. Rao --- International Center for Tropical Agriculture (CIAT), ColombiaSpecies of the genus Brachiaria originate primarily from Africa, where they are constituents of natural grasslands. Due to their adaptation to acidic, low-fertility soils, millions of hectares of Brachiaria species have been sown as improved pastures in South and Central... -
Effect of heat stress on seed yield components and oil composition in high- and mid-oleic sunflower hybrids
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Rouxléne van der Merwe --- Department of Plant Sciences, South Africa Maryke T Labuschagne --- Department of Plant Sciences, South Africa Liezel Herselman --- Department of Plant Sciences, South Africa Arno Hugo --- Department of Microbial, Biochemical and Food Biotechnology, South AfricaHigh temperature stress is a major environmental factor influencing processes such as growth, yield and quality of crops. The objective of this study was to assess the effect of heat stress, applied during grain-filling, on seed yield- and oil quality... -
Perceptions Among Professional Accounting Students of Self, Job Attractiveness and Academic Reputation
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: E Papageorgiou --- School of Accountancy, C Callaghan --- School of Economic and Business Sciences, D Coldwell --- School of Economic and Business Sciences, T Joosub --- School of Accountancy,Discussions around career pathways have gained momentum in the field of career development to assist young people in mapping out their career choices in order to achieve meaningful and productive futures. The purpose of the study was to empirically investigate... -
Anthropologies of knowledge and South Africa's Indigenous Knowledge Systems Policy
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Lesley Green --- Dept of Social Anthropology,Following a visit to the South African Medical Research Council's Indigenous Knowledge Systems Laboratory at Delft, Cape Town, this paper explores the possibilities for anthropological responses to South Africa's Indigenous Knowledge Systems Policy of 2004. While the Policy is admirable... -
Men, women, temporality and critical ethnography in Africa—the imperative for a transdisciplinary conversation
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Elaine Salo --- Institute for Women's and Gender Studies, University of Pretoria,This article addresses concerns of African-based scholars about how we can adequately represent the social heterogeneity and the rich diversity of African subjects. I argue that by prioritising Pan-Africanist solidarity, and in our search for African authenticity, we often represent... -
On law and legality in post-apartheid South Africa: insights from a migrant street trader
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Jürgen Schraten --- The Human Economy Project, Faculty of Humanities, South AfricaThis article focuses on the experience of law and legality by a migrant street trader in post-apartheid South Africa. The experiences of this stall vendor are analysed alongside theoretical notions of law and the legal system. The ways that law... -
Productivity and cost of whole‑tree harvesting without debarking in a Eucalyptus nitens plantation in Tasmania, Australia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Martin Strandgard --- University of the Sunshine Coast, Australia Damian Walsh --- University of the Sunshine Coast, Australia Rick Mitchell --- University of the Sunshine Coast, AustraliaThere is increasing interest worldwide in using tree harvesting biomass as an energy source. Bark retained on logs is commonly used as an energy source, but is generally removed from eucalypt logs during harvest. In order to evaluate the potential... -
Diseases on Eucalyptus species in Zimbabwean plantations and woodlots
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Luke Jimu --- Forest Science Postgraduate Programme, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Michael J Wingfield --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Eddie Mwenje --- Bindura University of Science Education, Zimbabwe Jolanda Roux --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), South AfricaZimbabwe embarked on planting Eucalyptus species in the early 1900s. Based on a robust breeding programme, it has become a major source of seed for other countries in and outside Africa. Tree health surveys conducted on Eucalyptus in some east... -
Movement behaviour of largemouth bass Micropterus salmoides in a South African impoundment
Item type: Journal Article • Journal: African Zoology • Authors: Dylan H Howell --- Department of Ichthyology and Fisheries Science, South Africa Paul D Cowley --- Department of Ichthyology and Fisheries Science, South Africa Amber-Robyn Childs --- Department of Ichthyology and Fisheries Science, South Africa Olaf LF Weyl --- Department of Ichthyology and Fisheries Science, South AfricaThe objectives of this study were to describe movements and area use patterns of largemouth bass Micropterus salmoides in relation to abiotic factors (water temperature, river inflow and water level). The study was conducted in the Kubusi arm of Wriggleswade... -
Reef fishes recruited at midwater coral nurseries consume biofouling and reduce cleaning time in Seychelles, Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Frias-Torres --- Nature Seychelles, Republic of Seychelles H Goehlich --- Nature Seychelles, Republic of Seychelles C Reveret --- Nature Seychelles, Republic of Seychelles PH Montoya-Maya --- Nature Seychelles, Republic of SeychellesIn coral reef restoration, coral gardening involves rearing coral fragments in underwater nurseries prior to transplantation. These nurseries become fish-aggregating devices and attract biofouling. We hypothesised that: (1) the presence of corals at a nursery is critical to recruit fish... -
NDM-1, novel TEM-205, novel TEM-213 and other extended-spectrum β-lactamases co-expressed in isolates from cystic fibrosis patients from South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Nonhlanhla Mhlongo --- Antimicrobial Research Unit, South Africa Sabiha Essack --- Antimicrobial Research Unit, South Africa Usha Govinden --- Antimicrobial Research Unit, South AfricaBackground: β-lactamase-mediated resistance was investigated in isolates from cystic fibrosis (CF) patients attending clinics in the public and private health sectors in Durban, South Africa. -
Application of geographical information system and remote sensing in malaria research and control in South Africa: a review
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Abiodun Morakinyo Adeola --- Department of Geography, Geoinformatics and Meteorology, South Africa Joel O Botai --- Department of Geography, Geoinformatics and Meteorology, South Africa Jane Mukarugwiza Olwoch --- South African Space Agency (SANSA), Earth Observation Directorate, South Africa Hannes CJ de W Rautenbach --- Department of Geography, Geoinformatics and Meteorology, South Africa Ahmed M Kalumba --- Department of Geography, Geoinformatics and Meteorology, South Africa Philemon L Tsela --- Department of Geography, Geoinformatics and Meteorology, South Africa Mayowa Omolola Adisa --- Department of Geography, Geoinformatics and Meteorology, South Africa Nsubuga Francis Wasswa --- Department of Geography, Geoinformatics and Meteorology, South Africa Paul Mmtoni --- Department of Geography, Geoinformatics and Meteorology, South Africa Ausi Ssentongo --- Department of Geography, Geoinformatics and Meteorology, South AfricaThis paper presents a review of numerous items of published literature on the use of spatial technology for malaria epidemiology in South Africa between 1930 and 2013. In particular, focus is on the use of statistical and mathematical models as... -
The Behaviour and Brain Function of the Cichlid Fish Hemihaplochromis Philander
Item type: Journal Article • Journal: Zoologica Africana • Authors: A.J. Ribbink --- Department of Zoology and Entomology,Forebrain extirpations from Hemihaplochromis philander (Pisces: Cichlidae) resulted in a decrease of aggressive (territorial), courtship, and spontaneous behaviour. The stimulus-response latency was found to be increased by the extirpations. Forebrainless males were unable to distinguish between male and female conspecifics... -
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... -
Additional material of the enigmatic golden mole Cryptochloris zyli, with notes on the genus Cryptochloris (Mammalia: Chrysochloridae)
Item type: Journal Article • Journal: African Zoology • Authors: K.M. Helgen --- Mammal Department, Museum of Comparative Zoology, U.S.A D.E. Wilson --- Division of Mammals, National Museum of Natural History, U.S.AVan Zyl’s golden mole (Cryptochloris zyli) is a distinctive but little-known species from the northwestern Cape Province of South Africa. Many authors have mentioned that it is known only by the holotype. Two other specimens are now known to exist;... -
Invasion of sandflats in Langebaan Lagoon, South Africa, by the alien mussel Mytilus galloprovincialis: size, composition and decline of the populations
Item type: Journal Article • Journal: African Zoology • Authors: N. Hanekom --- South African National Parks, South Africa P. Nel --- West Coast National Park, South AfricaSince the 1980s the introduced Mediterranean mussel (Mytilus galloprovincialis) has successfully invaded the southern African coastline and has become the dominant species on rocky intertidal shores of the west coast. This study investigates a recent extension of its distribution into... -
Phylogenetic relationships among members of the Pachydactylus capensis group of southern African geckos
Item type: Journal Article • Journal: African Zoology • Authors: Aaron M. Bauer --- Department of Biology, U.S.A. Trip Lamb --- Department of Biology, U.S.A.Phylogenetic relationships among members of the Pachydactylus capensis group of southern African geckos -
The population dynamics of the estuarine isopod Exosphaeroma hylocoetes (Barnard, 1940) within three temporarily open/closed southern African estuaries
Item type: Journal Article • Journal: African Zoology • Authors: T.O. Henninger [AN0001] P.W Froneman --- Department of Zoology and Entomology, South Africa A.N. Hodgson --- Department of Zoology and Entomology, South AfricaThe population dynamics of the estuarine isopod, Exosphaeroma hylocoetes, was investigated monthly from February 2006 to August 2007 in three temporarily open/closed Eastern Cape estuaries, the East and West Kleinemonde and Kasouga Estuaries. Mean isopod abundances and biomasses ranged between... -
Juvenile population dynamics of Oreochromis mossambicus in an intermittently open estuary at the limit of its natural distribution
Item type: Journal Article • Journal: African Zoology • Authors: B.R. Ellender --- Department of Ichthyology and Fisheries Science, South Africa O.L.F. Weyl --- Department of Ichthyology and Fisheries Science, South Africa M.K. Shanyengange --- Department of Ichthyology and Fisheries Science, South Africa P.D. Cowley --- South African Institute of Aquatic Biodiversity, South AfricaJuvenile Oreochromis mossambicus in the 25 ha, temperate, intermittently open, East Kleinemonde Estuary in the Eastern Cape, South Africa (33°32’S, 27°03’E), showed a seasonal shift in distribution, occupying all areas of the estuary in summer and, subsequently, being limited to... -
Growth and longevity of Exosphaeroma hylocoetes (Isopoda) under varying conditions of salinity and temperature
Item type: Journal Article • Journal: African Zoology • Authors: T.O. Henninger --- Department of Zoology and Entomology, South Africa P.W. Froneman --- Department of Zoology and Entomology, South Africa A.J. Booth --- Department of Ichthyology and Fisheries Science, South Africa A.N. Hodgson --- Department of Zoology and Entomology, South AfricaThe effect of temperature (15 and 25°C) and salinity (15 and 35 practical salinity units) combinations on the growth and longevity of the South African estuarine isopod Exosphaeroma hylocoetes was investigated and data analysed using the logistic growth model. No... -
Integration of non-communicable chronic diseases (NCDs) and HIV/AIDS and mental health care through the involvement of chronically ill patients using empowerment evaluation
Item type: Journal Article • Journal: South African Family Practice • Authors: Claire van Deventer --- Department of Family Medicine and Rural Health, South AfricaBackground: The emphasis in health care in South Africa is gradually shifting to acknowledge the different roles patients have regarding their own care. There is, however, very little evidence of this practice and of related practical outcomes. -
Post-fire vegetative recruitment of the alien grass Glyceria maxima at a KwaZulu-Natal Midlands dam, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LF Mugwedi --- School of Animal, Plant and Environmental Sciences, South Africa JM Goodall --- School of Animal, Plant and Environmental Sciences, South Africa ETF Witkowski --- School of Animal, Plant and Environmental Sciences, South Africa MJ Byrne --- Centre of Excellence for Invasion Biology, South AfricaAn accidental fire at a site where the reproductive behaviour of Glyceria maxima was being investigated provided an opportunity to measure its effect on G. maxima vegetative recruitment. The fire burned G. maxima growing along the water's edge and down... -
Occurrence of Tetracampos ciliotheca (Cestoda: Bothriocephalidea) in the gall bladder of Clarias anguillaris in Burkina Faso
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Y Sinaré --- Laboratoire de Biologie et Ecologie Animales, Département de Biologie et Physiologie Animales, Burkina Faso M Boungou --- Laboratoire de Biologie et Ecologie Animales, Département de Biologie et Physiologie Animales, Burkina Faso A Ouéda --- Laboratoire de Biologie et Ecologie Animales, Département de Biologie et Physiologie Animales, Burkina Faso K Mano --- Laboratoire de Biologie et Ecologie Animales, Département de Biologie et Physiologie Animales, Burkina Faso WN Kpoda --- Laboratoire de Biologie et Ecologie Animales, Département de Biologie et Physiologie Animales, Burkina Faso NG Sakiti --- Département de Zoologie, Benin GB Kabré --- Laboratoire de Biologie et Ecologie Animales, Département de Biologie et Physiologie Animales, Burkina FasoThe presence of the bothriocephalidean cestode Tetracampos ciliotheca Wedl, 1861 is reported from the gall bladders of the catfish Clarias anguillaris from Loumbila and Ziga reservoirs, Burkina Faso, in 2010–2011. Of the 159 specimens examined, 47 were infected. Mean intensity... -
Diatoms as water quality indicators in the upper reaches of the Great Fish River, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Holmes --- School of Biological Sciences, South Africa JC Taylor --- School of Biological Sciences, South AfricaThis study focused on the spring-fed upper reaches of the economically important Great Fish River with the aim of determining if diatoms could be used for biomonitoring in semi-arid conditions in southern Africa. Five sites were monitored monthly from 2010... -
Resource partitioning in two coexisting cladocerans, Daphnia magna and Scapheloberis kingi (Anomopoda: Daphniidae), in north-eastern Algeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Chakri --- Laboratoire de Recherche et de Conservation des Zones Humides, Algeria B Samraoui --- Laboratoire de Recherche et de Conservation des Zones Humides, AlgeriaLife-history traits of two coexisting cladocerans, Daphnia magna Straus and Scapheloberis kingi Sars, inhabiting a temporary pond in north-eastern Algeria were monitored in 2013 under laboratory conditions. Their life histories were compared for differences in traits such as age and... -
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... -
In vitro screening for endocrine disruptive activity in selected South African harbours and river mouths
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JC Truter --- Department of Botany and Zoology, South Africa JH van Wyk --- Department of Botany and Zoology, South Africa BK Newman --- Coastal Systems Research Group, Natural Resources and the Environment, South AfricaVarious waterborne anthropogenic contaminants disrupt the endocrine systems of wildlife and humans, targeting reproductive pathways, among others. Very little is known, however, regarding the occurrence of endocrine disruptive activity in South African freshwater ecosystems, and coastal ecosystems have not been... -
Diel effects on bottom-trawl survey catch rates of shallow- and deep-water Cape hakes Merluccius capensis and M. paradoxus off Namibia, using solar zenith angle
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Kainge --- National Marine Information and Research Centre (NatMIRC), Namibia K Wieland --- Section for Monitoring and Data, Institute of Aquatic Resources, Denmark J Feekings --- Section for Ecosystem based Marine Management, DenmarkDiel patterns in survey trawl catches for the Cape hakes Merluccius capensis and M. paradoxus off Namibia were studied in order to examine the effect of diel bias on catchability, and its implication for survey abundance estimation and the consistency... -
The factors affecting functionality and sustainability of mechanized elements of water supply systems in Mbeere South Sub-County, Kenya
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Job Kitetu --- Masinde Muliro University of Science and Technology, Kenya Kinyua Ngige --- Clean Air Energy Solutions, KenyaThis paper focuses on the functionality and sustainability of mechanized elements of water supply systems. Despite the huge sums of money spent by development agencies in developing water supply systems, once the projects are handed over to communities they start... -
Open Source as a viable technical resource for Nigeria's developing health system
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ogochukwu Eburuoh --- Department of Computer Science, USAThis article provides an in-depth analysis into the usefulness of Open Source Electronic Health Recording Systems for Nigeria's struggling health care system. It critiques the present quality of care received by patients, while advocating a revised education and management infrastructure... -
Integrating indigenous knowledge into appropriate technology development and implementation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: John Tharakan --- Department of Chemical Engineering, USAAppropriate Technology (AT) implementation should foster community empowerment and sustainability. Successful implementation requires community engagement throughout - technology conceptualization, development, implementation, assessment and impact evaluation. Development professionals should be sensitive to socio-cultural context and respect local knowledge, part of the... -
Using Rasch modelling to examine the international personality item pool (IPIP) values in action (VIA) measure of character strengths
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Graham A. du Plessis --- Department of Psychology, South Africa Gideon P. de Bruin --- Department of Psychology, South AfricaThis paper investigates the psychometric properties of the values in action (VIA) character strengths (Peterson and Seligman, 2004). A sample of 904 South African undergraduate students (female=77%, male=23%, black=70%, mean age=21.07 years, SD age=2.73 years) was assessed using a 380-item... -
Seasonal variations in the operating temperature of silicon solar panels in southern Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: H.A. Koffi --- Department of Physics, Ghana V.C.K. Kakane --- Department of Physics, Ghana A. Kuditcher --- Department of Physics, Ghana A.F. Hughes --- Department of Physics, Ghana M.B. Adeleye --- Department of Physics, Ghana J.K.A Amuzu --- Department of Physics, GhanaThis work deals with the seasonal daily variation of the operating temperature of silicon solar panels under tropical atmospheric conditions, including high turbidity (Harmattan dust particles). Data was collected from March 2010 to July 2012 at Legon (0°11′08″ W, 5°39'04″... -
Effect of briquetting temperature on the properties of biomass briquettes
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Okey Francis Obi --- Agricultural and Bioresources Engineering Department, Faculty of Engineering, NigeriaThe importance of and growing worldwide interest in developing technologies that could utilise biomass material cannot be over looked particularly in developing countries. This study investigated the effect of briquetting temperature (normal and high temperature) on the physical and combustion... -
Innovation policies in the Mediterranean area: Towards a Mediterranean system of innovation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Massimiliano Ferrara --- Department of Law and Economics, Italy Roberto Mavilia --- CRIOS, Bocconi University, ItalyThe contribution of this paper has both theoretical and policy relevance. It is one of the first exploratory studies of the Mediterranean system of innovation built on the concept of innovation systems. The paper provides a brief literature review and... -
Effect of energy sources on the milk production and reproduction of lactating Holstein cows
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: B. A. Useni --- Department of Animal Sciences, South Africa C. J. C. Muller --- Western Cape Department of Agriculture, South Africa C. W. Cruywagen --- Department of Animal Sciences, South AfricaThe objective of the study was to evaluate the effect of energy sources on milk production and reproduction of dairy cows on a pasture-based feeding system. Following parturition, 201 Holstein cows from the Elsenburg herd were fed ad libitum cultivated... -
Differential dependence of apple (Malus domestica Borkh.) cultivars on the xanthophyll cycle for photoprotection
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Simeon Hengari --- WRaDAC, Namibia Karen I Theron --- Department of Horticultural Science, South Africa Stephanie JE Midgley --- 84 Arum Road, South Africa Willem J Steyn --- Department of Horticultural Science, South AfricaThe dependence of fruit peel photosystems of ‘Granny Smith’, ‘Braeburn’, ‘Fuji’, ‘Golden Delicious’ and ‘Topred’ apple (Malus domestica Borkh.) peel on the xanthophyll cycle for photoprotection was studied under laboratory conditions. Mature fruit peel was either treated with 1 mm dithiothreitol... -
Molecular detection and characterisation of mumps virus in cerebrospinal fluid in a Gauteng laboratory
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Marieke Brauer --- Faculty of Health Sciences, Department of Medical Virology, South Africa Marianne Wolfaardt --- Faculty of Health Sciences, Department of Medical Virology, South Africa Lynne M Webber --- Faculty of Health Sciences, Department of Medical Virology, South Africa Maureen B Taylor --- Faculty of Health Sciences, Department of Medical Virology, South AfricaThe study aimed to determine the presence of mumps virus (MuV) in cerebrospinal fluid (CSF) specimens and to genetically characterise detected MuV strains. A real-time reverse transcription-polymerase chain reaction (RT-PCR) was used to detect the MuV F gene, and characterisation... -
Factors influencing career maturity in the South African National Defence Force: A diagnostic approach
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Carien van't Wout --- Department of Industrial Psychology, Faculty of Military Science, South Africa Gideon van Dyk --- Department of Industrial Psychology, Faculty of Military Science, South AfricaThis study investigated factors influencing the career maturity of young members of the South African National Defence Force (SANDF). A sample of 310 young SANDF members (females=35%, blacks=90%) completed the following measures: career maturity inventory-revised, the career decision self-efficacy scale,... -
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... -
Reflooding the Faguibine floodplain system, northern Mali: potential benefits and challenges
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: O Hamerlynck --- Kenya Wetlands Biodiversity Research Team, Kenya SA Moulaye Zeine --- Global Monitoring, Mauritania JY Mutua --- Kenya Wetlands Biodiversity Research Team, Kenya LV Mukhwana --- Kenya Wetlands Biodiversity Research Team, Kenya M Yéna --- Direction Nationale de l’Hydraulique du Mali, MaliThe Faguibine system, northern Mali, consists of a series of interconnected floodplains of which the flooded surface area declined from about 1 000 km² in the late 19th century to only some 90 km² in 2010. Flood extent depends on... -
Studying the Logone floodplain, Cameroon, as a coupled human and natural system
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Moritz --- Department of Anthropology, USA S Laborde --- Department of Anthropology, USA SC Phang --- Department of Evolution, Ecology, and Organismal Biology, USA M Ahmadou --- University of Maroua, Cameroon M Durand --- Byrd Polar Research Center, USA A Fernandez --- Byrd Polar Research Center, USA IM Hamilton --- Department of Evolution, Ecology, and Organismal Biology, USA S Kari --- Centre d'Appui a la Recherche et au Pastoralisme (CARPA), Cameroon B Mark --- Byrd Polar Research Center, USA P Scholte --- Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ), Cameroon N Xiao --- Department of Geography, USA R Ziebe --- University of Maroua, CameroonAfrican floodplains are an excellent example of coupled human–natural systems because they exhibit strong interactions among multiple social, ecological, and hydrological systems. The intra-annual and interannual variations in seasonal flooding have direct and indirect impacts on ecosystems and human lives... -
Mangrove reforestation: greening or grabbing coastal zones and deltas? Case studies in Senegal
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MC Cormier-Salem --- IRD, UMR PALOC, Senegal J Panfili --- IRD, UMR MARBEC, FranceBesides their important contribution to global biodiversity, mangroves provide many services. Nevertheless, due to an increase of human activities and to climate change, in less than 20 years these ecosystems have lost one fifth of their global surface area. In... -
Have grass carp driven declines in macrophyte occurrence and diversity in the Vaal River, South Africa?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PSR Weyl --- Zoology and Entomology Department, South Africa GD Martin --- Zoology and Entomology Department, South AfricaThe Vaal River, South Africa, historically had a rich diversity of native submerged macrophytes with at least 13 species from 5 families recorded. Over the past 10 years there has been a noticeable reduction in the occurrence and diversity of... -
Burrow architecture of the Damaraland mole-rat (Fukomys damarensis) from South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Hannah G Thomas --- Department of Zoology, South Africa Daniel Swanepoel --- Department of Zoology, South Africa Nigel C Bennett --- Department of Zoology, South AfricaThe burrow architecture (length, internal dimensions, fractal dimension of tunnel systems, number of nesting chambers and surface mounds) was investigated in the Damaraland mole-rat (Fukomys damarensis). A total of 31 animals were caught from five different colonies and their burrow... -
Characterisation of the dietary relationships of two sympatric hake species, Merluccius capensis and M. paradoxus, in the northern Benguela region using fatty acid profiles
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JA Iitembu --- Department of Fisheries and Aquatic Sciences, Namibia NB Richoux --- Department of Zoology and Entomology, South AfricaThe two sympatric species of Cape hake, Merluccius capensis and M. paradoxus, have been the main targets of bottom-trawl fisheries off Namibia for several decades. The feeding ecology of these hakes has been studied mainly using stomach content analyses and... -
Spatial characterisation of the Benguela ecosystem for ecosystem-based management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Kirkman --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa L Blamey --- Marine Research Institute, South Africa T Lamont --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa JG Field --- Marine Research Institute, South Africa G Bianchi --- Food and Agriculture Organization, Italy JA Huggett --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa L Hutchings --- Marine Research Institute, South Africa J Jackson-Veitch --- Marine Research Institute, South Africa A Jarre --- Marine Research Institute, South Africa C Lett --- Institut de Recherche pour le Développement [IRD], UMR MARBEC 248, France MR Lipiński --- Department of Ichthyology and Fisheries Science, South Africa SW Mafwila --- Department of Fisheries and Aquatic Sciences, Namibia MC Pfaff --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa T Samaai --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa LJ Shannon --- Marine Research Institute, South Africa Y-J Shin --- Marine Research Institute, South Africa CD van der Lingen --- Marine Research Institute, South Africa D Yemane --- Marine Research Institute, South AfricaThe three countries of the Benguela Current Large Marine Ecosystem (BCLME), namely Angola, Namibia and South Africa, have committed to implementing ecosystem-based management (EBM) including an ecosystem approach to fisheries (EAF) in the region, to put in practice the principles... -
Living labs and knowledge creation in developing countries: Living labs as a tool for socio-economic resilience in Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Lauri Hooli --- Department of Geography and Geology, Finland Jussi S. Jauhiainen --- Department of Geography and Geology, Finland Kristiina Lähde --- , TANZICT-project, Dar es SalaamLiving Labs (LL) are platforms to increase innovation through the interaction of various actors. LLs are based on an open innovation process, community involvement, co-creation of products, and services or societal innovations together with users. Bottom-up approaches, such as LLs,... -
Mining business optimisation through a reconfigurable vibrating screen design
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olasumbo Ayodeji Makinde --- Department of Industrial Engineering, South Africa Khumbulani Mpofu --- Department of Industrial Engineering, South Africa Boitumelo Ramatsetse --- Department of Industrial Engineering, South AfricaFluctuation in mineral concentrates demand, unstable mineral market conditions and high machine downtime and its associated costs have been the most recent challenges that have affected the mining industry. This sector has not fully understood these factors. In order to... -
Family versus individual plant selection for stem borer (Eldana saccharina) resistance in early stages of sugarcane breeding in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marvellous Zhou --- South African Sugarcane Research Institute, South Africa Alfred Mokwele --- South African Sugarcane Research Institute, South AfricaEldana saccharina is an indigenous lepidopteran insect pest and the most damaging stem borer of sugarcane in southern Africa. Breeding for E. saccharina resistance in South Africa started in 1980 by crossing resistant parents (expected to possess resistance genes) and... -
The power of research in finance to enhance sustainability – Applied to practice
Item type: Journal Article • Journal: • Authors: Gernot Peichl --- Hilton Tallinn Park, Accounting and Finance Department, Tallinn, EstoniaMany people think of research in the hospitality industry as being difficult to relate to practice. This paper shows not only how theory can be applied to practice, but also how practice is related to theory with regard to concepts... -
Multiple cardiovascular disease risk factors in rural Kenya: evidence from a health and demographic surveillance system using the WHO STEP-wise approach to chronic disease risk factor surveillance
Item type: Journal Article • Journal: South African Family Practice • Authors: PM Chege --- Department of Family Medicine, KenyaBackground: To describe the distribution of obesity, hypertension, dysglycaemia and dyslipidaemia (which are risk factors for cardiovascular disease) using a Health and Demographic Surveillance System (HDSS) site in western Kenya. -
Influence of the annual flood-pulse on catch per unit effort, condition and reproduction of Clarias gariepinus from the upper Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Bokhutlo --- Department of Biology and Biotechnological Sciences, Botswana OLF Weyl --- South African Institute for Aquatic Biodiversity, South Africa K Mosepele --- Okavango Research Institute (University of Botswana), Botswana GG Wilson --- Ecosystem Management, School of Environmental and Rural Science, AustraliaCatch per unit effort (CPUE), length, weight and maturity data for Clarias gariepinus were collected during monthly gillnet surveys in the upper Okavango Delta between 2001 and 2009 to investigate their relationship with the annual flood-pulse. CPUE, condition factor (K)... -
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... -
Monitoring eucalypt bud temperature using mobile temperature loggers
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Robin AW Gardner --- Institute for Commercial Forestry Research, South Africa Michael J Savage --- Agrometeorology Discipline, School of Agricultural, Earth and Environmental Sciences, South Africa Isa Bertling --- Horticultural Science Discipline, School of Agricultural, Earth and Environmental Sciences, South AfricaWinter chilling is a key environmental trigger of floral induction in temperate Eucalyptus. Over the past two decades, considerable site × eucalypt flowering interaction research has been undertaken over a range of high elevation (>1 100 m asl) forestry sites in... -
A taper function for Pseudotsuga menziesii plantations 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 Roque Rodríguez-Soalleiro --- Departamento de Producción Vegetal, Spain Fernando Castedo-Dorado --- Departamento de Ingeniería y Ciencias Agrarias, Spain Sacramento Corral-Rivas --- División de Estudios de Posgrado e Investigación, México Juan G Álvarez-González --- Departamento de Ingeniería Agroforestal, SpainFive stem taper models belonging to three different taper function categories were fitted to data corresponding to 282 Pseudotsuga menziesii trees. The trees were selected in the area surrounding 61 research plots installed in Galicia, Asturias and the Basque Country,... -
Development of a Malian food exchange system based on local foods and dishes for the assessment of nutrient and food intake in type 2 diabetic subjects
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: A. Coulibaly --- Département des sciences des aliments et de nutrition, Faculté des sciences de l’agriculture et de l’alimentation, Canada Ht O’Brien --- Département des sciences des aliments et de nutrition, Faculté des sciences de l’agriculture et de l’alimentation, Canada I. Galibois --- Département des sciences des aliments et de nutrition, Faculté des sciences de l’agriculture et de l’alimentation, CanadaObjective: To develop exchange lists for the assessment of food and nutrient intakes for people with diabetes in Mali. -
Food availability and accessibility in the local food distribution system of a low-income, urban community in Worcester, in the Western Cape province
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Ja Roos --- Department of Industrial Engineering, Ga Ruthven --- Department of Industrial Engineering, Mj. Lombard --- Research and Information Division of Human Nutrition Faculty of Medicine and Health Sciences, Mh McLachlan --- Research and Information Division of Human Nutrition Faculty of Medicine and Health Sciences,Objectives: The objective was to understand the local food distribution system in Avian Park, with a focus on food availability and accessibility. -
A proportional integral synthesis for a variable speed wind energy conversion system using a permanent magnet synchronous generator
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Francis-Daniel Menga --- Department of Renewable Energy, Cameroon Noël Djongyang --- Department of Renewable Energy, Cameroon Danwé Raïdandi --- Department of Renewable Energy, Cameroon Réné Tchinda --- LISIE, CameroonA wind energy conversion system applied to battery charge is proposed in this paper. A permanent magnet synchronous generator (PMSG) is used as a variable speed generator in the proposed system. In order to extract the maximum power, the generator... -
The Pareto principle and a hazard model as tools for appropriate scheduled maintenance in a manufacturing firm
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Johnson A. Fadeyi --- Industrial and Systems Engineering, USA Modestus O. Okwu --- Department of Mechanical Engineering, Nigeria Chinedum O. Mgbemena --- Department of Mechanical Engineering, Nigeria Kingsley C. Ezekiel --- Department of Maintenance Engineering and Asset Management, School of Mechanical, United KingdomThis study relates to a manufacturing firm that produces sanitary towels in Nigeria. The firm was confronted with operational challenge of high production downtime occasioned by frequent breakdown of the subsystems of the production system. This situation thus threatened its... -
From enterprise development to inclusive innovation – A systemic instruments framework for regional innovation support
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sara S (Saartjie) Grobbelaar --- Department of Industrial Engineering and DST-NRF Centre of Excellence in Scientometrics and Science, South Africa Nigel Gwynne-Evans --- Trade and Sector Development, Western Cape Department of Economic Development and Tourism, South Africa Alan C. Brent --- Department of Industrial Engineering, South AfricaAlthough the role and importance of innovation support in South Africa is a well-recognised concept on the national level, provincial governments have only recently started to debate, investigate and explore instruments through which innovation can be leveraged and supported regionally... -
Contrast and contradiction: Being a black adolescent in contemporary South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Natasha Arndt --- Department of Psychology, South Africa Luzelle Naudé --- Department of Psychology, South AfricaThis study aimed to gain in-depth understanding of the lived identity of black African adolescents in a contemporary South African setting. A purposive sample of 59 adolescents (females = 47%; Sesotho = 46%, Setswana = 36%, Other = 18%) from... -
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... -
Summer and winter differences in zooplankton biomass, distribution and size composition in the KwaZulu-Natal Bight, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Pretorius --- University of the Western Cape, South Africa JA Huggett --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa MJ Gibbons --- University of the Western Cape, South AfricaZooplankton biomass and distribution in the KwaZulu-Natal Bight were investigated in relation to environmental parameters during summer (January–February 2010) and winter (July–August 2010). Mean zooplankton biomass was significantly higher in winter (17.1 mg dry weight [DW] m–3) than in summer... -
A system-level modelling perspective of the KwaZulu-Natal Bight ecosystem, eastern South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: UM Scharler --- School of Life Sciences, South Africa RC van Ballegooyen --- Coastal Systems Research Group, South Africa MJ Ayers --- School of Life Sciences, South AfricaThe KwaZulu-Natal Bight comprises the only sizeable shelf region on the eastern coast of South Africa, and is influenced by both the Agulhas Current on its seaward side and rivers and estuaries on its landward side. Established knowledge of the... -
Observations and mechanisms of upwelling in the northern KwaZulu-Natal Bight, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MJ Roberts --- Ocean Sciences and Marine Food Security, South Africa C Nieuwenhuys --- Bayworld Centre for Research and Education, South AfricaNew in situ time-series data were acquired by two ADCP moorings placed on the shelf off Richards Bay on the east coast of South Africa at depths of 25 m and 582 m between October 2009 and August 2010. 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... -
Efficacy of antimicrobial lock solutions in preventing catheter-related blood stream infection in haemodialysis patients: a systematic review and meta-analysis of prospective randomised controlled trials
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Ahmad Maifada Yakasai --- Infectious and Tropical Diseases Unit, Department of Medicine, Public Health and Diagnostic Institute, College of Medical Sciences, Nigeria Hamza Muhammad --- Infectious and Tropical Diseases Unit, Department of Medicine, Nigeria Garba Iliyasu --- Infectious and Tropical Diseases Unit, Department of Medicine, Nigeria Aisha Muhammad Nalado --- Aminu Kano Teaching Hospital, Nigeria Mahmood Muhammad Dalhat --- Infectious and Tropical Diseases Unit, Department of Medicine, Nigeria Zaiyad Garba Habib --- Department of Medicine, Nigeria Farouk Daiyabu --- Infectious and Tropical Diseases Unit, Department of Medicine, Nigeria Chinagozi Precious Edwin --- Department of Microbiology, Nigeria Musa Baba Maiyaki --- Aminu Kano Teaching Hospital, Nigeria Daiyabu Alhaji Ibrahim --- Aminu Kano Teaching Hospital, NigeriaBackground: Catheter-related blood stream infection (CRBSI) contributes to morbidity and mortality among patients on haemodialysis (HD). We carried out a systematic review and meta-analysis to assess the efficacy of antimicrobial lock solutions (ALS) in preventing CRBSI. Method: Electronic search of... -
Structure and dynamics of demersal fish assemblages over three decades (1985–2012) of increasing fishing pressure in Guinea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Camara --- Centre National des Science Halieutiques de Boussoura (CNSHB), Republic of Guinea B Mérigot --- Université de Montpellier, France F Leprieur --- Université de Montpellier, France JA Tomasini --- Université de Montpellier, France I Diallo --- Centre National des Science Halieutiques de Boussoura (CNSHB), Republic of Guinea M Diallo --- Centre National des Science Halieutiques de Boussoura (CNSHB), Republic of Guinea D Jouffre --- Institut de Recherche pour le Développement, SenegalIn a context of growing fishing pressures and recommendations for an ecosystem approach to fisheries, there is a need to monitor changes in fish communities over time. In this study, we analysed data from scientific trawl surveys carried out on... -
Adolescents’ perceptions of health and well-being: Influences of urban contemporary music
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Cindy Swartbooi --- Department of Psychology, South Africa Shazly Savahl --- Department of Psychology, South Africa Deborah Isobell --- Department of Psychology, South Africa Gadija Khan --- Department of Psychology, South Africa Cassandra Wagenaar --- Department of Psychology, South Africa Fadzisai Makonyonga --- Department of Psychology, South Africa Thandokazi Maseti --- Department of Psychology, South Africa Laaiqah Parker --- Department of Psychology, South Africa Tshinondiwa Ramaite --- Department of Psychology, South AfricaThe study aimed to explore adolescents’ perceptions of how urban contemporary music influences health and well-being among them. Data on health and well-being effects of music consumption were gathered from a convenience sample of 16 participants (male = 50%, females... -
Heart rate variability predicts 30-day all-cause mortality in intensive care units
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: David G Bishop --- Perioperative Research Group, Pietermaritzburg Metropolitan Department of Anaesthetics, South Africa Robert D Wise --- Perioperative Research Group, Pietermaritzburg Metropolitan Department of Anaesthetics, South Africa Carolyn Lee --- Perioperative Research Group, Pietermaritzburg Metropolitan Department of Anaesthetics, South Africa Richard P von Rahden --- Perioperative Research Group, Pietermaritzburg Metropolitan Department of Anaesthetics, South Africa Reitze N Rodseth --- Perioperative Research Group, Pietermaritzburg Metropolitan Department of Anaesthetics, South AfricaBackground: Autonomic nervous function, as quantified by heart rate variability (HRV), has shown promise in predicting clinically important outcomes in the critical care setting; however, there is debate concerning its utility. HRV analysis was assessed as a practical tool for... -
Inheritance of resistance to Ug99 stem rust pathogen in selected barley lines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mercy N Wamalwa --- Egerton University, Kenya Ruth Wanyera --- Kenya Agricultural and Livestock Research Organization, Kenya Peter N Njau --- Kenya Agricultural and Livestock Research Organization, Kenya Michael A Okiror --- Egerton University, Kenya James O Owuoche --- Egerton University, KenyaStem rust (Puccinia graminis tritici) race Ug99 is a devastating disease of wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.). Barley is the world's fourth most important cereal crop after wheat, maize (Zea mays L.) and rice (Oryza sativa... -
Crop rotation and tillage system effects on reducing ryegrass occurrence in spring wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sinovuyo M Nteyi --- Department of Agricultural Management, South Africa Raymond MB Auerbach --- Department of Agricultural Management, South Africa Michael I Ferreira --- Plant Sciences, South Africa Johan Labuschagne --- Plant Sciences, South AfricaUnder the Mediterranean climatic conditions of the Western Cape province, the Swartland region is intensively cropped, producing spring wheat (Triticum aestivum L.), but due to ryegrass competition, yield is reduced. In addition, ryegrass has developed resistance to herbicides. This necessitates... -
Effects of rooting media on root growth and morphology of Brassica rapa seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael O Adu --- Department of Ecological Sciences, UK David O Yawson --- Department of Soil Science, School of Agriculture, College of Agriculture and Natural Sciences, Ghana Frederick A Armah --- Department of Environmental Science, School of Biological Science, College of Agriculture and Natural Sciences, Ghana Paul A Asare --- Department of Crop Science, School of Agriculture, College of Agriculture and Natural Resources, Ghana Malcolm J Bennett --- Plant and Crop Sciences Division, School of Biosciences, UK Martin R Broadley --- Plant and Crop Sciences Division, School of Biosciences, UK Philip J White --- Department of Ecological Sciences, UK Lionel X Dupuy --- Department of Ecological Sciences, UKRooting media used in current root phenotyping studies can have substantial effect. In this study, the effects of three different nutrient conducting papers (Black construction paper, Anchor blue germination paper and Kimpak paper) and soil-filled boxes on root growth and... -
Name changes and additions to the southern African freshwater fish fauna
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PH Skelton --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaChanges made to the scientific names of southern African freshwater fishes since 2001 are explained and discussed. Adjustments to the phylogeny and classification of the fauna are outlined. Recent systematic studies on cyprinines are discussed and changes to the genera... -
Efficacy and deficiencies of rapid biomonitoring in biodiversity conservation: a case study in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HM Barber-James --- Department of Freshwater Invertebrates, South Africa LL Pereira-da-Conceicoa --- Department of Zoology and Entomology, South AfricaRapid biomonitoring protocols, using biotic indices based on macroinvertebrate diversity to assess river ecosystem health, are widely used globally. Such quick assessment techniques are lauded for the rapid results obtained and the relatively easy protocol used to achieve an answer... -
Clinical correlates of suicidality among individuals with HIV infection and AIDS disease in Mbarara, Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Godfrey Zari Rukundo --- Department of Psychiatry, Uganda Eugene Kinyanda --- Department of Psychiatry, Uganda Brian Mishara --- Centre for Research and Intervention on Suicide and Euthanasia and Psychology Department, CanadaThe association between suicidality and HIV/AIDS has been demonstrated for three decades, but little is know about risk factors that can help understand this association and help identify who is most at risk. Few research studies have been conducted in... -
Enigmatic tissue in the orobranchial chamber of cardinalfishes of the genus Siphamia (Perciformes, Apogonidae)
Item type: Journal Article • Journal: African Zoology • Authors: Ofer Gon --- South African Institute for Aquatic Biodiversity, South Africa Shirley C Pinchuck --- Electron Microscopy Unit, South AfricaAn unusual tissue covering the tongue and occasionally part of the gill chamber of many species of the Indo-Pacific cardinalfish genus Siphamia is described and compared with an earlier description of a similar tissue found in the cichlid species Alcolapia... -
A new galago species for South Africa (Primates: Strepsirhini: Galagidae)
Item type: Journal Article • Journal: African Zoology • Authors: Fabien Génin --- African Primate Initiative for Ecology and Speciation, Department of Zoology and Entomology, South Africa Ayabulela Yokwana --- African Primate Initiative for Ecology and Speciation, Department of Zoology and Entomology, South Africa Nokuthula Kom --- African Primate Initiative for Ecology and Speciation, Department of Zoology and Entomology, South Africa Sébastien Couette --- Ecole Pratique des Hautes Etudes, Laboratoire Paléobiodiversité et Evolution and UMR uB CNRS 6282 “Biogéosciences”, France Thibault Dieuleveut --- Emirates Center for Wildlife Propagation, Morocco Stephen D Nash --- , USA Judith C Masters --- African Primate Initiative for Ecology and Speciation, Department of Zoology and Entomology, South AfricaThe primate fauna of South Africa has historically been viewed as comprising three diurnal cercopithecoid taxa – chacma baboons (Papio ursinus), vervet (Chlorocebus pygerythrus) and samango monkeys (Cercopithecus albogularis) – and two nocturnal lorisoid species – the thick-tailed greater galago... -
Effectiveness and efficiency of national systems of innovation: A comparative analysis of Ghana and Kenya
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Frank L. Bartels --- Innov-8 Policy Advisory Services Ltd, Austria Ritin Koria --- Innov-8 Policy Advisory Services Ltd, Austria Liliana Andriano --- Department of Sociology, United KingdomThis paper presents a comparative analysis of the determinants of the effectiveness and efficiency of the Ghana National System of Innovation (GNSI) and the Kenya National System of Innovation (KNSI) for crafting evidence-based policy. Two regression analyses are performed respectively... -
Leadership and governance: learning outcomes and competencies required of the family physician in the district health system
Item type: Journal Article • Journal: South African Family Practice • Authors: R Mash* --- Division of Family Medicine and Primary Care, South Africa J Blitz --- Division of Family Medicine and Primary Care, South Africa Z Malan --- Division of Family Medicine and Primary Care, South Africa K Von Pressentin --- Division of Family Medicine and Primary Care, South AfricaThe South African National Development Plan expects the family physician to be a leader of clinical governance within the district health services. The family physician must also help to strengthen the services through leadership in all his/her other roles as... -
Re-engineering of South Africa’s primary health care system: where is the pharmacist?
Item type: Journal Article • Journal: South African Family Practice • Authors: A. Bheekie --- School of Pharmacy, South Africa H. Bradley --- School of Public Health, South AfricaSouth Africa’s transition towards a district-based health system (DHS) aims to offer health promotion and prevention services at community level, through re-engineered primary health care (PHC) services. Along with pharmacy workforce shortages and service delivery challenges, health reform is a... -
Ensuring an optimal environment for peer education in South African schools: Goals, systems, standards and policy options for effective learning
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Sharlene Swartz --- Human Sciences Research Council, South Africa Charles Deutsch --- Harvard Catalyst Population Health Research Program, USA Benita Moolman --- Human Sciences Research Council, South Africa Emma Arogundade --- Human Sciences Research Council, South Africa Dane Isaacs --- Human Sciences Research Council, South Africa Barbara Michel --- Centre for the Support of Peer Education, South AfricaPeer education has long been seen as a key health promotion strategy and an important tool in preventing HIV infection. In South African schools, it is currently one of the strategies employed to do so. Based on both a recent... -
Dynamic Tensions from Management Control Systems and Performance in a Sub-Saharan African Economy: Mediating Effects of Competitive Strategy
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Moses Acquaah --- Department of Management, USA Ahmed Agyapong --- Department of Marketing and Corporate Strategy, GhanaThis study examines how the dynamic tension created as a result of the simultaneous and balanced use of controlling and innovative forces of management control systems indirectly influences firm performance through competitive strategy. Using data from 106 firms from Ghana,... -
Methods for assessing the impact of research on innovation and development in the agriculture and food sectors
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ludovic Temple --- Cirad Umr Innovation, France Estelle Biénabe --- Cirad Umr Innovation, France Danielle Barret --- Cirad-Dgdrs, France Gilles Saint-Martin --- Cirad-Dgdrs, FranceThe need for technological transition and the context of the privatization of public research funding both challenge the evolution of methods to assess the impact of research in the agricultural and food sectors. We analyze this evolution through a literature... -
Distribution and community structure of Ostracoda (Crustacea) in shallow waterbodies of southern Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B Rumes --- Limnology Unit, Department of Biology, Belgium T Van der Meeren --- Limnology Unit, Department of Biology, Belgium K Martens --- Limnology Unit, Department of Biology, Belgium D Verschuren --- Limnology Unit, Department of Biology, BelgiumThe current study presents the ostracod communities recovered from 26 shallow waterbodies in southern Kenya, combined with an ecological assessment of habitat characteristics. A total of 37 waterbodies were sampled in 2001 and 2003, ranging from small ephemeral pools to... -
Modelling the tides and their impacts on the vertical stratification over the Sofala Bank, Mozambique
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CM Chevane --- Instituto Nacional de Hidrografia e Navegação, Mozambique P Penven --- LMI ICEMASA, Laboratoire de Physique des Océans, France FPJ Nehama --- Escola Superior de Ciências Marinhas e Costeiras, Mozambique CJC Reason --- Department of Oceanography, South AfricaThe Sofala Bank, a wide shelf located along the central coast of Mozambique, hosts tides with high amplitudes. The Regional Ocean Modelling System (ROMS) was used to analyse the tidal currents on the bank and to investigate their effects on... -
Growth and nutritional qualities of three ocimum species as affected by methods of propagation
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: A. I. Okunlola --- Department of Crop, Soil and Pest Management, Nigeria O. C. Ogungbite --- Department of Biology, Nigeria G. F. Hassan --- Department of Crop, Soil and Pest Management, NigeriaOcimum species are well known for their medicinal values and this has increased demand from individuals and the pharmaceutical industry. In order to meet the demand for this plant species three different Ocimum species (Ocimum basilicum, Ocimum gratissimum and Ocimum... -
The power of research in finance to enhance sustainability – Applied to practice
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Gernot Peichl --- Hilton Tallinn Park, Accounting and Finance Department, EstoniaMany people think of research in the hospitality industry as being difficult to relate to practice. This paper shows not only how theory can be applied to practice, but also how practice is related to theory with regard to concepts... -
Lifestyle and mental health among school-going adolescents in Namibia
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- ASEAN Institute for Health Development, Thailand Supa Pengpid --- ASEAN Institute for Health Development, ThailandThis study examined the association between lifestyle behaviours and psychological distress indicators among school-going adolescents. The analysis included 4 531 school children, 11–18 years of age, who completed the Namibia Global School-based Student Health Survey (GSHS) in 2013. Multivariable logistic... -
Conceptions of agency and constraint for HIV-positive patients and healthcare workers to support long-term engagement with antiretroviral therapy care in Khayelitsha, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Erin Stern --- Division of Social and Behavioural Sciences, School of Public Health and Family Medicine, South Africa Christopher Colvin --- Division of Social and Behavioural Sciences, School of Public Health and Family Medicine, South Africa Nobom Gxabagxaba --- Division of Social and Behavioural Sciences, School of Public Health and Family Medicine, South Africa Charlotte Schutz --- Clinical Infectious Diseases Research Initiative, Institute of Infectious Diseases and Molecular Medicine and Department of Medicine, School of Public Health and Family Medicine, South Africa Rosie Burton --- Southern African Medical Unit, Médecins Sans Frontières, South Africa Graeme Meintjes --- Clinical Infectious Diseases Research Initiative, Institute of Infectious Diseases and Molecular Medicine and Department of Medicine, School of Public Health and Family Medicine, South AfricaIn the context of the optimism around antiretroviral therapy (ART) as prevention of HIV/AIDS, addressing the barriers to long-term ART adherence is critical. This is particularly important given the tendency to individualise or use a blame discourse when exploring why... -
University-driven inclusive innovations in the Western Cape of South Africa: Towards a research framework of innovation regimes
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sara Grobbelaar --- DST-NRF CoE in Scientometrics and Science, Technology and Innovation Policy, South Africa Robert Tijssen --- Centre for Research on Evaluation, Science and Technology (CREST), South Africa Marjolijn Dijksterhuis --- Stellenbosch Business School, South AfricaInclusive innovation refers to the improvement of living conditions and creation of employment opportunities for the poor through the development or co-creation of new products, services, processes and business models aimed at resource poor communities. Based on an empirical study... -
Wind energy potential and economic evaluation of WPS using WECSs in three selected locations of Northern Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Shiva Prashanth Kumar Kodicherla --- Department of Civil Engineering, College of Engineering & Technology, Ethiopia Satyanarayana Gaddada --- Department of Electrical and Computer Engineering, College of Engineering & Technology, Ethiopia Nagaraju Shaik --- Department of Construction Management, College of Engineering & Technology, EthiopiaThis paper analyzes wind energy potential and economic evaluation of water pumping system (WPS) employed by various wind energy conversion systems (WECSs). The wind speed data gathered from three different locations of Northern Ethiopia are analyzed using the Weibull probability... -
The mechanisms behind environmental strategies in chemical manufacturing firms
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Keshminder Singh --- Faculty of Business and Management, Malaysia VGR Chandran --- Faculty of Economics and Administration, Department of Development Studies, Malaysia Santha Chenayah Ramu --- Faculty of Economics and Administration, Department of Economics, MalaysiaThe evaluation of an effective environmental strategy goes beyond understanding its antecedents and benefits. Identifying and understanding the various mechanisms behind the formulation, design and implementation of environmental strategies is important – yet past studies have not adequately addressed this... -
Effect of land use on water quality and phytoplankton community in the tropical Khami River in semi-arid southwest Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Dzinomwa --- Department of Environmental Science and Health, Faculty of Applied Science, Zimbabwe HGT Ndagurwa --- Department of Forest Resources and Wildlife Management, Faculty of Applied Science, ZimbabweThe water quality and phytoplankton community assemblage of the Khami River, a tropical river sub catchment in semi-arid southwest Zimbabwe impacted by agriculture and urban land use, were examined in March 2015. Conductivity, sulphates, total dissolved solids and salinity were... -
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... -
Periphytic diatom communities in tributaries around Lake Ichkeul, northern Tunisia: a preliminary assessment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Ouchir --- Department of Earth Sciences F.S.B, Tunisia S Morin --- Unité de Recherche EABX, France L Ben Aissa --- Department of Earth Sciences F.S.B, Tunisia M Boughdiri --- Department of Earth Sciences F.S.B, Tunisia A Aydi --- Department of Earth Sciences F.S.B, TunisiaAn initial inventory of diatom biodiversity at 12 sites draining into Lake Ichkeul, northern Tunisia, was performed in summer 2014, together with the characterisation of metal pollution status by analysing trace metal concentrations to determine Water Quality Indices. The maximum... -
Influence of temperature, aluminium chloride toxicity and exposure to Bacillus subtilis on the germination of okra
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Matsobane T Mathiba --- Department of Agriculture and Animal Health, South Africa Khayalethu Ntushelo --- Department of Agriculture and Animal Health, South Africa Fhatuwani Mudau --- Department of Agriculture and Animal Health, South AfricaInfluences of heat, aluminium chloride concentration and exposure to Bacillus subtilis on germination of okra seed were investigated. A factorial experiment was conducted using Petri dish assays, and seed germination percentage and coleoptile length were recorded for the different treatments... -
Vegetative growth of Amaranthus hybridus and Amaranthus tricolor under different watering regimes in different seasons in southern Mozambique
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Jerónimo EMM Ribeiro --- Department of Agronomy, South Africa Petrus J Pieterse --- Department of Agronomy, South Africa Sebastião I Famba --- Faculty of Agronomy and Forestry Engineering, MozambiqueDrought-tolerant crops with high nutritional value such as amaranth leafy vegetables have the potential to improve the diet of rural communities in dry semi-arid areas of southern Mozambique. A study was conducted aiming to assess the vegetative growth and leaf... -
Determining fPAR and leaf area index of several land cover classes in the Pot River and Tsitsa River catchments of the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anthony R Palmer --- Centre for African Conservation Ecology, South Africa Andiswa Finca --- Agricultural Research Council–Animal Production Institute, South Africa Sukhmani K Mantel --- Institute for Water Research, South Africa Onalenna Gwate --- Institute for Water Research, South Africa Zahn Münch --- Department of Geography and Environmental Studies, South Africa Lesley A Gibson --- Department of Construction and Surveying, UKDetermining the quantum (both annual maxima and minima) and the temporal variation in the leaf area index (LAI), and the fraction of photosynthetically active radiation (fPAR), are three fundamental biophysical characteristics of the plant canopy that should parameterise ecophysiological models... -
Changes in vegetation structure and aboveground biomass in response to traditional rangeland management practices in Borana, southern Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Bikila Negasa Gilo --- Yabello Pastoral and Dryland Agriculture Research Center, Ethiopia Tessema Zewdu Kelkay --- Rangeland Ecology and Biodiversity Program, College of Agriculture and Environmental Sciences, EthiopiaThis study aimed to determine vegetation structure, species diversity and aboveground herbaceous biomass and browse yields in Borana rangelands of southern Ethiopia. Sampling through random allocation of quadrats within replicated sample plots was undertaken in communally grazed areas, grazing enclosures... -
Historical vegetation–environment patterns for assessing the impact of climatic change in the mountains of Lesotho
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Craig Morris --- Agricultural Research Council – Livestock Business Division, c/o School of Life Sciences, South AfricaClimate change will probably profoundly impact the Maloti Mountains in Lesotho, which are likely to have a warmer, wetter and more CO2-enriched (eCO2) atmosphere in the future. Intensive smallstock grazing could exacerbate the effects of climate change on the mountain... -
Psychological validation of the Rosenberg Self-Esteem Scale (RSES) in South Africa: Method effects and dimensionality in black African and white university students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Malose Makhubela --- Department of Psychology, Solomon Mashegoane --- Department of Psychology,The study examined the factor structure and cross-cultural validity of the Rosenberg Self-esteem Scale (RSES) in a sample of South African students (N = 862; black African = 67%, female = 71.5%). Alternative a priori CFA models (unidimensional, bi-dimensional and... -
Comparison of infrared thermography and miniature Deltatron accelerometer sensors in the measurement of structural vibration characteristics
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Stephen M. Talai --- Department of Mechanical Engineering, South Africa Dawood A. Desai --- Department of Mechanical Engineering, South Africa P. Stephan Heyns --- Department of Mechanical and Aeronautical Engineering, South AfricaThis paper investigates the comparison of infrared thermography (IRT) and miniature Deltatron accelerometer sensors in measuring structural vibration characteristics in terms of frequency and displacement, given that of age IRT has fully grown for temperature condition monitoring. In addition, IRT... -
Long-term trends in cetacean occurrence during the annual sardine run off the Wild Coast, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Caputo --- Department of Zoology and Entomology, South Africa PW Froneman --- Department of Zoology and Entomology, South Africa D du Preez --- School of Environmental Sciences, South Africa G Thompson --- KwaZulu-Natal Sharks Board, South Africa S Plön --- School of Environmental Sciences, South AfricaDuring the austral winter, cetaceans and other apex predators follow the annual northeastward movement of shoaling sardines, known as the sardine run, along the southeast coast of South Africa, including a 400-km stretch called the Wild Coast. In total, 131... -
Anaesthetic management of a patient with multiple system atrophy
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Supriya Dsouza --- Department of Critical Care, India Anil Parakh --- Department of Anaesthesiology, India Adarsh Kulkarni --- Seth Gs Medical College and Kem Hospital, India Ajit Baviskar --- Department of Critical Care, IndiaMultiple system atrophy (MSA) is a rare adult-onset neurodegenerative disease. Symptoms vary from autonomic dysfunction to Parkinsonism and cerebellar ataxia, in any combination. MSA affects many organ systems with many possible complications and makes perioperative management of a patient with... -
Commercialization of higher education institutions’ research within the National System of Innovation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Wanjiru Gachie --- Discipline of Computer Science Education, South Africa Desmond Wesley Govender --- Discipline of Computer Science Education, South AfricaThe commercialization of higher education institutions’ (HEIs’) research within the South African National System of Innovation (NSI) has received prominence in the post-apartheid era. Intra-African NSI dialogue to draw out context-specific and generic country experiences that could inform policy developments,... -
Operation and maintenance of back-up photovoltaic systems: An analysis based on a field study in Cameroon
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kodji Deli --- Department of Renewable Energy, Higher Institute of the Sahel, Cameroon Etienne Tchoffo Houdji --- Department of Renewable Energy, Higher Institute of the Sahel, Cameroon Noel Djongyang --- Department of Renewable Energy, Higher Institute of the Sahel, Cameroon Donatien Njomo --- Environmental Energy Technologies Laboratory (EETL), Department of Physics, Faculty of Science, CameroonThis work is an analysis of the data collected from 20 photovoltaic installations all over Cameroon. The objectives are to study the causes of the breakdown of the different installations and propose maintenance strategies to solve them and to evaluate... -
Exploring the validity of scores from the Rosenberg Self-Esteem Scale (RSES) in Burundi: A multi-strategy approach
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Anne Fromont --- School of Public Health, Belgium Slim Haddad --- Research Unit, Canada Rolf Heinmüller --- External consultant, Canada Bruno T. Dujardin --- School of Public Health, Belgium Annalisa Casini --- Psychological Sciences Research Institute, BelgiumThe present study aimed to validate the Rosenberg Self-Esteem Scale (RSES) in Burundi, through a multi-strategy approach used in cross-cultural studies. Respondents were 906 health workers (men = 56%; caregivers 60%). They responded to a bilingual version of RSES. We... -
Experiences of the health care delivery system in a rural South African setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Joan E. Stoyanov --- Psychology Department, South Africa Stephen D. Edwards --- Psychology Department, South AfricaThis exploratory study aimed to examine health care provider work-related experiences in a rural South African context. Participants were a convenient sample of 12 medical practitioners (private sector = 55%). The practitioners responded to an open-ended question on their health... -
Long-term livestock grazing increases the recruitment success of epigeal termites: insights from a >75-year grazing experiment in the Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: James G Hagan --- Department of Biological Sciences, South Africa Justin CO du Toit --- Grootfontein Agricultural Development Institute, South Africa Michael D Cramer --- Department of Biological Sciences, South AfricaEpigeal termites alter ecosystem-level processes through foraging and mound building. These effects are proportional to density. Whilst much is known about the factors influencing mound density in natural settings, how termites respond to livestock grazing has been overlooked. We compared... -
Grazing management that regenerates ecosystem function and grazingland livelihoods
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Richard Teague --- Department of Ecosystem Science and Management, USA Matt Barnes --- Shining Horizons Land Management LLC, USAAdopting a systems view and regenerative philosophy can indicate how to regenerate ecosystem function on commercial-scale agro-ecological landscapes. Adaptive multi-paddock grazing management is an example of an approach for grazinglands. Leading conservation farmers have achieved superior results in ecosystem improvement,... -
What are the long-term effects of high-density, short-duration stocking on the soils and vegetation of mesic grassland in South Africa?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Sindiso Chamane --- School of Life Sciences, South Africa Kevin P Kirkman --- School of Life Sciences, South Africa Craig Morris --- Agricultural Research Council–Animal Production Institute, South Africa Tim O’Connor --- South African Environmental Observation Network, South AfricaHigh-density, short-duration stocking (HDG) is gaining popularity amongst farmers in the South African mesic grasslands, but little is known about its potential impact on natural resources. Using a fence-line contrast approach, this study compared the long-term effects of HDG with... -
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... -
Wasted wines
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Elize Koldenhof --- Alumni International Hospitality Management, The Netherlands Femke Vrenegoor --- International Hospitality and Service Management, The NetherlandsThis paper reports on a management project, a fourth-year research project at Stenden Hotel Management School, dedicated to reducing wine waste at Landgoedhotel de Wilmersberg in De Lutte (the Netherlands). To do this, the beverage cost percentages were explored for... -
Environmental factors influencing the distribution and prevalence of Schistosoma haematobium in school attenders of ILembe and uThungulu Health Districts, KwaZulu-Natal Province, South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Nkosinathi Banhela --- Discipline of Public Health Medicine, South Africa Myra Taylor --- Discipline of Public Health Medicine, South Africa Siphosenkosi Gift Zulu --- Discipline of Public Health Medicine, South Africa Linnea Sund Strabo --- Norwegian Centre for Imported and Tropical Diseases, Department of Infectious Diseases Ullevaal, Norway Eyrun Floerecke Kjetland --- Discipline of Public Health Medicine, South Africa Svein Gunnar Gundersen --- Research Department, NorwaySchistosoma haematobium infection is reported to facilitate the development of urogenital diseases. Its symptoms include haematuria, dysuria and tiredness, and it may cause cognitive decline in children. The prevalence of S. haematobium infection needs to be known in endemic areas... -
In-vitro diagnostics (IVDs) innovations for resource-poor settings: The Indian experience
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nidhi Singh --- Centre for Studies in Science Policy, India Dinesh Abrol --- Institute for Studies in Industrial Development (ISID), IndiaThis article illustrates how the present institutional arrangements and the policy regime under perusal have not been able to support the development of an ecosystem for innovation-making for in-vitro diagnostics (IVDs) for resource-poor settings. Policies favouring trade liberalization and foreign... -
Exploring the Jawaharlal Nehru National Solar Mission (JNNSM): Impact on innovation ecosystem in India
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Amitkumar Singh Akoijam --- PhD Scholar, Centre for Studies in Science Policy (CSSP), School of Social Science, India V. V. Krishna --- Professorial Fellow, Faculty of Arts and Social Sciences, AustraliaTo make India one of the leaders in solar energy generation and to promote ecologically sustainable growth that addresses the nation’s energy security challenge is one of the promising goals of the Jawaharlal Nehru National Solar Mission (JNNSM) or National... -
Increasing crop diversity increased soil microbial activity, nitrogen-sourcing and crop nitrogen, but not soil microbial diversity
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Zander S Venter --- Department of Animal Sciences, South Africa Samantha L Scott --- Plant Conservation Unit, South Africa Johann Strauss --- Directorate-Plant Sciences, Western Cape Department of Agriculture, South Africa Karin Jacobs --- Department of Microbiology, South Africa Heidi-Jayne Hawkins --- Conservation South Africa, Centre for Biodiversity Conservation, Kirstenbosch National Botanical Gardens, South AfricaThe relationships between crop diversity, soil microbial diversity and agroecosystem functioning are not well understood. Soils under wheat monoculture, wheat–medic, and wheat–medic plus clover rotations from a 19-year-old wheat rotation trial in South Africa were measured for soil microbial functional... -
The taxonomic position and breeding range of Golden Nightjar Caprimulgus eximius (Caprimulgidae)
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Yvonne Lawrie --- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, UK Robert Swann --- , UK Peter Stronach --- , UK Yoav Perlman --- Israel Ornithological Center, Israel J Martin Collinson --- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, UKGolden Nightjar Caprimulgus eximius is an apparently sedentary sub-Saharan species with a breeding range extending from Senegal and Mauritania to Sudan. Although genetic studies of nightjars and related Caprimulgiformes have been published previously, none has included Golden Nightjar. In this... -
Determinants of forage adoption and production niches among smallholder farmers in Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Donald MG Njarui --- Kenya Agricultural and Livestock Research Organization-Katumani, Kenya Mwangi Gatheru --- Kenya Agricultural and Livestock Research Organization-Katumani, Kenya Elias M Gichangi --- Kenya Agricultural and Livestock Research Organization-Katumani, Kenya Elikana M Nyambati --- Kenya Agricultural and Livestock Research Organization-Headquarters, Kenya Clotilda N Ondiko --- Kenya Agricultural and Livestock Research Organization-Mtwapa, Kenya Keziah W Ndungu-Magiroi --- Kenya Agricultural and Livestock Research Organization-Kitale, KenyaA study was conducted to assess factors that influence adoption of forages and choice of production niches in smallholder farms in Kenya. A total of 786 farmers (268 from coastal lowlands, 171 from eastern midlands, 132 from central highlands and... -
Analysis of bycatch in the South African midwater trawl fishery for horse mackerel Trachurus capensis based on observer data
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JR Reed --- Marine Research Institute, Department of Biological Sciences, South Africa SE Kerwath --- Marine Research Institute, Department of Biological Sciences, South Africa CG Attwood --- Marine Research Institute, Department of Biological Sciences, South AfricaThe South African midwater trawl fishery targets adult horse mackerel Trachurus capensis. The bulk of the catch is taken by a single freezer-trawler, the biggest fishing vessel operating in South African waters. As fishing takes place off the south coast... -
Phylogeny of the Sepia officinalis species complex in the eastern Atlantic extends the known distribution of Sepia vermiculata across the Benguela upwelling region
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AJE Healey --- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Wales NJ McKeown --- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Wales WM Potts --- Department of Ichthyology and Fisheries Science, South Africa CL de Beer --- Department of Ichthyology and Fisheries Science, South Africa W Sauer --- Department of Ichthyology and Fisheries Science, South Africa PW Shaw --- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, WalesAccurate species identification and biogeographic characterisation are fundamental for appropriate management of expanding cephalopod fisheries. This study addresses this topic within the common cuttlefish Sepia officinalis species complex (S. officinalis, S. hierredda and S. vermiculata), with an emphasis on occurrence... -
Geostatistical modelling of the spatial life history of post-larval deepwater hake Merluccius paradoxus in the Benguela Current Large Marine Ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Jansen --- Benguela Current Commission, Namibia K Kristensen --- Technical University of Denmark – National Institute of Aquatic Resources (DTU Aqua), Denmark TP Fairweather --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa P Kainge --- Ministry of Fisheries and Marine Resources (MFMR), Namibia JN Kathena --- Ministry of Fisheries and Marine Resources (MFMR), Namibia MD Durholtz --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa JE Beyer --- Technical University of Denmark – National Institute of Aquatic Resources (DTU Aqua), Denmark UH Thygesen --- Technical University of Denmark – National Institute of Aquatic Resources (DTU Aqua), DenmarkOptimal and sustainable management of fish resources cannot be ensured without a thorough understanding of the migration patterns and population (demographic stock) structure. Recent studies suggest that these aspects of the economically and ecologically important deepwater hake Merluccius paradoxus are... -
Interventions and pathways for South African women in engineering and the built environment professions
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Christianah O. Ijagbemi --- Department of Industrial Engineering, South Africa Mukondeleli G. Kanakana --- Department of Industrial Engineering, South Africa Harold M. Campbell --- Department of Industrial Engineering, South AfricaWomen engineers are known to be very resourceful, result-oriented, committed and hardworking. The low participation of women in engineering and the built environment professions has been taking its toll on the economic and infrastructural development of South Africa. The practice... -
Mother- and daughter-in-law relationship within a South African context: Influence of family systems
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Tebogo Rosina Nganase --- Department of Psychology, South Africa Wilna Basson --- Department of Psychology, South AfricaThis study explored family system influences on mother-in-law and daughter-in-law relationships in a South African setting. A convenience sample of 20 mothers-in-law (age range from 40 to 86) and 20 daughters-in-law (age range from 20 to 60) were informants. They... -
The factor structure of the Social Axioms Survey II (SASII) in the South African context
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Adi Barnard --- Department Human Resource Management, Economic Management Science, South Africa Deon Meiring --- Department Human Resource Management, Economic Management Science, South Africa Ian Rothmann --- Optentia Research Focus Area, South AfricaThe objective of this study was to validate the new Social Axioms Survey II (SASII). The study sample comprised university students (n = 793) as well as their family members and friends (n = 645). Confirmatory factor analysis (CFA) following... -
Acoustic communication and reproductive behaviour in the aquatic frog Xenopus laevis (Pipidae), a field study
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Achim Ringeis --- , , Germany Birgit Krumscheid --- , , Germany Phillip J. Bishop --- , , New Zealand Christian de Vries --- , , Germany Andreas Elepfandt --- , , GermanyWe studied the acoustic and reproductive behaviour of the clawed frog, Xenopus laevis, in a pond with clear water in South Africa over a period of two months. It contained 21 adult males and females. Each was marked with a... -
The bird’s-eye perspective: how do district health managers experience the impact of family physicians within the South African district health system? A qualitative study
Item type: Journal Article • Journal: South African Family Practice • Authors: KB Von Pressentin --- Division of Family Medicine and Primary Care, South Africa RJ Mash --- Division of Family Medicine and Primary Care, South Africa L Baldwin-Ragaven --- Department of Family Medicine, School of Clinical Medicine, South Africa RPG Botha --- Department of Family Medicine, South Africa I Govender --- Department of Family Medicine, South Africa WJ Steinberg --- Department of Family Medicine, South AfricaBackground: Health policy-makers in Africa are looking for local solutions to strengthen primary care teams. A South African national position paper (2015) described six aspirational roles of family physicians (FPs) working within the district health system. However, the actual contributions... -
Predatory pelagic fishes of the Bijagós Archipelago (Guinea-Bissau) show high overlap in diets dominated by sardinella
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Correia --- Centro de Estudos do Ambiente e do Mar (CESAM), Departamento de Biologia Animal, Portugal JP Granadeiro --- Centro de Estudos do Ambiente e do Mar (CESAM), Departamento de Biologia Animal, Portugal A Regalla --- Instituto da Biodiversidade e das Áreas Protegidas da Guiné-Bissau (IBAP), Guinea-Bissau E Dias --- Instituto da Biodiversidade e das Áreas Protegidas da Guiné-Bissau (IBAP), Guinea-Bissau A Almeida --- Centro de Investigação Pesqueira Aplicada (CIPA), Guinea-Bissau P Catry --- Marine and Environmental Sciences Centre (MARE), PortugalKnowledge of trophic interactions between the key components of marine communities is required to understand food-web dynamics and develop ecosystem-based management approaches. In West Africa, where fisheries sustain the livelihoods of a significant part of the human population, this understanding... -
Molecular research on the systematically challenging smoothhound shark genus Mustelus: a synthesis of the past 30 years
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SN Maduna --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa AE Bester-van der Merwe --- Molecular Breeding and Biodiversity Group, Department of Genetics, South AfricaThe species-rich genus Mustelus (smoothhounds) of the shark family Triakidae is one of the most bio-economically important groups of elasmobranchs in the world’s oceans. Despite the commercial value of Mustelus, the systematics of the group remains largely unresolved and there... -
Validation and downscaling of Advanced Scatterometer (ASCAT) soil moisture using ground measurements in the Western Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Jason Moller --- Institute for Water Studies, South Africa Nebo Jovanovic --- Institute for Water Studies, South Africa Cesar L Garcia --- Consejo Nacional de Investigaciones Cientificas y Tecnologicas (CONICET – UCC), Argentina Richard DH Bugan --- CSIR, South Africa Dominic Mazvimavi --- Institute for Water Studies, South AfricaSatellite-based remote sensing of soil water content (SWC) is a promising technology for hydrological applications to overcome large spatiotemporal variabilities of SWC. This study investigated the performance of the Advanced Scatterometer (ASCAT) soil moisture product on METOP satellite (∼12.5 km... -
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... -
Intraspecific cleaning by juvenile Cape white seabream Diplodus capensis (Sparidae) off eastern South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PC Sikkel --- Department of Biological Sciences and Environmental Sciences Program, USA NJ Smit --- Water Research Group, Unit for Environmental Sciences and Management, South AfricaJuveniles of the Cape white seabream Diplodus capensis were observed cleaning adult conspecifics in a large tidepool off Sodwana Bay, South Africa. Although nine other tropical fish species were present and interacted with a nearby pair of Labroides cleaner wrasses,... -
The bivalve Lembulus bicuspidatus may enhance denitrification in shelf sediment at the Angola–Benguela Frontal Zone
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Neumann --- University of Hamburg, Institute for Geology, Germany A Flohr --- Leibniz Center for Tropical Marine Ecology, GermanyWe collected living individuals of the bivalve Lembulus bicuspidatus, which shows an unusual preference for the oxygen-deficient habitat found at the Angola–Benguela Frontal Zone of the southeastern Atlantic. With a series of incubation experiments with 15N-labelled nitrate as a tracer... -
Presence of microplastics in the tube structure of the reef-building polychaete Gunnarea gaimardi (Quatrefages 1848)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HA Nel --- Department of Zoology and Entomology, South Africa PW Froneman --- Department of Zoology and Entomology, South AfricaThe prevalence of microplastics in the marine environment has resulted in a need to understand their association with various fauna. The aim of this study was to assess whether microplastic particles are present in the tube structure of the indigenous... -
Metal accumulation in two contiguous eutrophic peri-urban lakes, Chivero and Manyame, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B Utete --- Chinhoyi University of Technology, Zimbabwe C Phiri --- Chinhoyi University of Technology, Zimbabwe SS Mlambo --- Chinhoyi University of Technology, Zimbabwe N Maringapasi --- Chinhoyi University of Technology, Zimbabwe N Muboko --- Chinhoyi University of Technology, Zimbabwe TB Fregene --- Department of Aquaculture and Fisheries Management, Nigeria B Kavhu --- University of Zimbabwe, ZimbabweConcentrations of aluminium, cadmium, chromium, cobalt, copper, iron, lead, nickel and zinc were determined in surface water, benthic sediments, and the gills, liver and stomach muscle tissues of Oreochromis niloticus and Clarias gariepinus in peri-urban lakes Chivero and Manyame, Zimbabwe... -
Biometric variations and oxidative stress responses in juvenile Clarias gariepinus exposed to Termex®
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JU Nnadi --- Department of Zoology and Environmental Biology, Nigeria IN Dimelu --- Department of Home Economics and Hospitality Management Education, Nigeria SI Nwani --- Department of Agriculture Education, Nigeria JC Madu --- Department of Zoology and Environmental Biology, Nigeria CI Atama --- Department of Zoology and Environmental Biology, Nigeria GN Attamah --- Department of Zoology and Environmental Biology, Nigeria JI Okwor --- Department of Zoology and Environmental Biology, Nigeria CD Nwani --- Department of Zoology and Environmental Biology, NigeriaThe current study investigated the effects of termite insecticide, Termex® (imidacloprid 35.50% SC), on biometric variations and oxidative stress biomarkers in Clarias gariepinus. Fish were exposed to 4.00 and 6.00 µg l–1 sublethal Termex® concentrations in 2017. The gill and... -
Derivation of scenario-specific water quality guidelines for acid mine drainage in South Africa, using a risk-based approach
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EC Vellemu --- Unilever Centre for Environmental Water Quality, South Africa PK Mensah --- Unilever Centre for Environmental Water Quality, South Africa N Griffin --- Unilever Centre for Environmental Water Quality, South Africa ON Odume --- Unilever Centre for Environmental Water Quality, South AfricaAcid mine drainage (AMD) continues to threaten water quality in many mining regions globally. Data paucity renders it challenging to inform appropriate water quality management strategies for a succinct scientific understanding of the effects of AMD on freshwater ecosystems. The... -
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... -
Electronic Medical Record System as a central ICT tool for quality healthcare services: Nigeria as a case study
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Oluwatoyin Seun Ayanlade --- African Institute for Science Policy and Innovation (AISPI), NigeriaThis study uses mixed methods to evaluate the benefits and challenges of implementing the Electronic Medical Record System (EMRS). Using Southwestern Nigeria as a case study, the study focuses on the factors that have been delaying the introduction of EMRS;... -
Evaluation of UFPA quality assessment criteria for monitoring and evaluation system in the Ghanaian construction industry
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: C. Tengan --- Faculty of Engineering and the Built Environment, Sustainable Human Settlement and Construction Research Centre, South Africa C.O. Aigbavboa --- Faculty of Engineering and the Built Environment, Sustainable Human Settlement and Construction Research Centre, South Africa A.E. Oke --- Faculty of Engineering and the Built Environment, Sustainable Human Settlement and Construction Research Centre, South AfricaThe need to ensure that construction project monitoring and evaluation systems generate the required project information for effective project delivery and decision-making is imperative for project success. The study evaluates the UFPA quality assessment criteria for monitoring and evaluation system... -
Building an innovation system and indigenous knowledge in Namibia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Lauri Johannes Hooli --- Department of Geography and Geology, Finland Jussi Sakari Jauhiainen --- Department of Geography and Geology, EstoniaNamibia, like many southern African countries, aims to become a knowledge-based society with a well-established innovation system (IS). Development based on knowledge and innovation reduces poverty and inequality, even if this causality is also contested. In this study, we analyzed... -
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... -
Effect of stocking density on vegetation and animal performance within the semi-arid shrublands of the Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Christiaan J Harmse --- Northern Cape Department of Agriculture, Land Reform and Rural Development, South Africa Hannes J Gerber --- Northern Cape Department of Agriculture, Land Reform and Rural Development, South AfricaAs the primary land use in the Karoo, extensive small-stock farming contributes significantly towards the agricultural economy of the region. However, the sustainability of this practice has been questioned for many years. This led to the establishment of a long-term... -
Seasonal variations in the diet and food selection of the Algerian hedgehog Atelerix algirus
Item type: Journal Article • Journal: African Zoology • Authors: Chafika Mouhoub-Sayah --- Laboratoire de Zoologie Appliquée et d’Ecophysiologie Animale, Faculté des Sciences de la Nature et de la Vie, Algeria Hafsa Djoudad-Kadji --- Laboratoire de Zoologie Appliquée et d’Ecophysiologie Animale, Faculté des Sciences de la Nature et de la Vie, Algeria Florian Kletty --- Université de Strasbourg, CNRS, IPHC, France André Malan --- Institut des Neurosciences Cellulaires et Intégratives, France Jean-Patrice Robin --- Université de Strasbourg, CNRS, IPHC, France Michel Saboureau --- Institut des Neurosciences Cellulaires et Intégratives, France Caroline Habold --- Université de Strasbourg, CNRS, IPHC, FranceThe Algerian hedgehog Atelerix algirus is an insectivorous species. However, the exact composition of its natural diet remains largely undetermined, especially in relation to seasonal variations in food availability. From March to November, we simultaneously analysed the composition of 180... -
A novel system dynamics’ model for the motors of a sectoral innovation system–simulating and policymaking
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sayyed Mohsen Azad --- Department of Industrial Engineering, Iran Seyed Hassan Ghodsypour --- Department of Industrial Engineering, IranIn recent years, science and technology policymaking has been taken into consideration by many researchers. One of the most important fields of this policymaking is innovation systems’ management; which is divided into national, regional, sectoral and technological innovation systems. In... -
Calcium improves gerbera (Gerbera hybrida) vase life
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Nic JJ Combrink --- Department of Agronomy, Faculty of AgriSciences, South AfricaThe vase life of Gerbera hybrida cut flowers is about two weeks. To prevent wilting, hypochlorite is widely used in vase water to control micro-organisms that may block xylem cells and restrict water uptake. In this study, three levels of... -
“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... -
Secondary Nothofagus dombeyi forests: site index curves and dominant height in the Coastal Range of south-central Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos Esse --- Escuela de Ciencias Ambientales, Nucleo de Estudios Ambientales, Chile Pablo J Donoso --- Instituto de Bosques y Sociedad, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Chile Victor Gerding --- Instituto de Bosques y Sociedad, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Chile Francisco Encina-Montoya --- Escuela de Ciencias Ambientales, Nucleo de Estudios Ambientales, Chile Celso Navarro --- Escuela de Ciencias Ambientales, Nucleo de Estudios Ambientales, ChileNothofagus dombeyi is distributed on very diverse sites in the temperate forests of Chile and Argentina. In Chile, studies on its dynamics and productivity in forests, where it is the dominant species, have been carried out mainly in the foothills... -
A multimetric-index approach using fisheries data to assess fish assemblage structure in relation to salinity gradient in a tropical West African estuary
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Kantoussan --- Université Gaston Berger de Saint-Louis, Senegal JM Ecoutin --- Institut de Recherche pour le Développement (IRD), France R Laë --- Institut de Recherche pour le Développement (IRD), France OT Thiaw --- Institut Universitaire de Pêche et d’Aquaculture (IUPA), Université Cheikh Anta Diop de Dakar, Senegal L Tito de Morais --- Institut de Recherche pour le Développement (IRD), FranceThis study examines the effects of increasing salinity on fish assemblage structure in the Casamance Estuary, Senegal, using a series of indices. The study data were derived from commercial fishery surveys conducted between April and July 2005. Analysis of within-trophic-group... -
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)... -
Effect of drift sampler exposure time and net mesh size on invertebrate drift density in the Njoro River, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW Mureithi --- Department of Biological Sciences, Kenya JG Mbaka --- Department of Land and Water Management, Kenya CM M’Erimba --- Department of Biological Sciences, Kenya JM Mathooko --- Department of Biological Sciences, KenyaAlthough invertebrate drift is an important ecological process in lotic ecosystems, very little is known about it in Kenyan rivers. The primary aim of this study was to investigate the effect of driftnet mesh size and exposure duration on drift... -
The investment return puzzle on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Pravin Semnarayan --- Gordon Institute of Business Science, University of Pretoria, South Africa Michael Ward --- Gordon Institute of Business Science, University of Pretoria, South Africa Chris Muller --- Gordon Institute of Business Science, University of Pretoria, South AfricaFirms that invest into positive net present value projects should outperform firms that do not invest. Surprisingly, several studies on United States data have found a negative relationship between capital investment and subsequent shareholder return. There are conflicting explanations for... -
Relationships of water temperature and aquatic macroinvertebrate community structure with non-native riparian plant densities in the southern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- Centre for Water Resources Research, South Africa HF Dallas --- Freshwater Research Centre, South Africa, and Nelson Mandela Metropolitan University, South Africa FC de Moor --- Albany Museum and Department of Zoology and Entomology, South Africa J Barendse --- Sustainability Research Unit/South African National Parks, South AfricaNon-native vegetation in the riparian zone impacts on water temperatures, flow patterns, degree of shading, channel modification, and changes to natural sediment loads. Freshwater ecosystems in the Garden Route Initiative planning domain are of particular conservation value, because of the... -
Soil taxonomy proposals for acid sulfate soils and subaqueous soils raised by the 8th International Acid Sulfate Soils Conference
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Barret M Wessel --- Department of Environmental Science and Technology, USA John M Galbraith --- Department of Crop and Soil Environmental Sciences, USA Mark H Stolt --- Department of Natural Resources Science, USA Martin C Rabenhorst --- Department of Environmental Science and Technology, USA Delvin S Fanning --- Department of Environmental Science and Technology, USA Maxine J Levin --- USDA-Natural Resources Conservation Service, USAThe 8th International Acid Sulfate Soils Conference presented examples and discussions for classification of ‘acid sulfate soils’ and related issues for ‘subaqueous soils’. When these soils are disturbed or exposed, the sulfides (predominantly pyrite) react with oxygen to produce sulfuric... -
A review of conservation agriculture research in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Corrie M Swanepoel --- Agricultural Research Council–Institute for Soil, South Africa Lourens H Swanepoel --- Department of Zoology, South Africa Hendrik J Smith --- Grain SA, South AfricaConservation agriculture (CA) is advocated as a sustainable farming method to improve soil health, increase crop yields and food security, while reducing input costs. In South Africa, a country with low rainfall, limited agricultural lands and a large smallholder farming... -
Environmental responses of jellyfish polyps as drivers of medusa populations off the coast of Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Ziegler --- Department of Biodiversity and Conservation Biology, South Africa MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaJellyfish populations in the southeastern Atlantic off the coast of Namibia have increased subsequent to the decline of small pelagic fisheries at the end of the 1960s, although the environment there has also become warmer and the waters off Walvis... -
Assessment of the likely sensitivity to climate change for the key marine species in the southern Benguela system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Ortega-Cisneros --- Department of Ichthyology and Fisheries Science, South Africa S Yokwana --- Department of Ichthyology and Fisheries Science, South Africa W Sauer --- Department of Ichthyology and Fisheries Science, South Africa K Cochrane --- Department of Ichthyology and Fisheries Science, South Africa A Cockcroft --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South Africa L Singh --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa M Smale --- Department of Zoology and Coastal and Marine Research, South Africa A Wood --- Gleneagles Environmental Consulting, South Africa G Pecl --- Institute for Marine and Antarctic Studies, AustraliaClimate change is altering many environmental parameters of coastal waters and open oceans, leading to substantial present-day and projected changes in the distribution, abundance and phenology of marine species. Attempts to assess how each species might respond to climate change... -
Analysing the diffusion and adoption of renewable energy technologies in Africa: The functions of innovation systems perspective
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Aschalew Demeke Tigabu --- African Centre for Technology Studies (ACTS), KenyaRenewable energy technologies have increasingly been promoted to address energy poverty and environmental sustainability challenges in Africa. Yet, their diffusion and uptake remain marginal. The focus of renewable energy technology diffusion research in Africa has largely been on identifying technological,... -
Using deliberative foresight to envision a neo-carbon energy innovation ecosystem – a case study of Kenya
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Joni Karjalainen --- Finland Futures Research Centre (FFRC), Finland Sirkka Heinonen --- Finland Futures Research Centre (FFRC), FinlandForesight is a pragmatic futures studies approach as structured debate about future-related topics. Deliberative foresight addresses stakeholders affected by specific futures. This paper goes beyond a low-carbon strategy to present the potential of futures based on renewable energy. In the... -
Photovoltaic performance prediction in Northern Nigeria using generated typical meteorological year dataset
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 Muyiwa S. Adaramola --- Faculty of Environmental Sciences and Natural Resource Management, Norway Olanrewaju M. Oyewola --- Department of Mechanical Engineering, Nigeria Richard O. Fagbenle --- Department of Mechanical Engineering, Nigeria Damola S. Adelekan --- The Energy and Environment Research Group (TEERG), Mechanical Engineering Department, Nigeria Jatinder Gill --- Ph.D Research Scholar, IKGPTU, Kapurthala, India Fidelis I. Abam --- Energy, exergy and environment research group (EEERG), Department of Mechanical Engineering, NigeriaRelevant meteorological files are needed by simulation software to assess the energy performances of buildings or efficiency of renewable energy systems. This paper adopts the Sandia method to generate typical meteorological year (TMY), using a 35-year hourly measured meteorological dataset... -
Building low-carbon energy innovation systems in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Radhika Perrot --- Independent researcher, South Africa Maruf Sanni --- National Centre for Technology Management, NigeriaThe objective of this special issue is to bring together research on low-carbon innovation in the African context. The aim is to assess and compare various cases of low-carbon energy development in Africa in an effort to understand the underlying... -
A model for addressing parallelism of systems in the management of data: The Namibian case
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Irja Shaanika --- Department of Information Technology, South Africa Monica Maletzky --- Department of Information Technology, South Africa Tiko Iyamu --- Department of Information Technology, South AfricaAs in many countries, the volume of data that has been generated by the Namibian government administrations and agencies in recent years has increased drastically in rapidity. Consequently, this has led to difficulties and challenges in the control and management... -
Systemic policy instruments for inclusive innovation systems: Case study of a maternal mHealth project in South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Edward van der Merwe --- Centre for Research on Evaluation, South Africa Sara S (Saartjie) Grobbelaar --- Department of Industrial Engineering, South AfricaInnovation for inclusive development refers to the development of products and services for and/or by marginalized communities with the aim of improved economic and social welfare. Innovation systems present a framework for analyzing actors, institutions, interlinkages and societal subsystems that... -
Molecular phylogenetics reveals a complex history underlying cryptic diversity in the Bush Squeaker Frog (Arthroleptis wahlbergii) in southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: KA Tolley --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South Africa W Conradie --- Port Elizabeth Museum, South Africa J Harvey --- Devonshire Avenue, South Africa J Measey --- Centre for Invasion Biology, Department of Botany and Zoology, South Africa DC Blackburn --- Florida Museum of Natural History, United StatesThroughout the Miocene, the African landscape underwent broad climatic shifts that profoundly influenced the distribution of fauna and flora. Since the late Miocene, these shifts have created a landscape in southern Africa that is strongly characterised by savanna and arid... -
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... -
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... -
Drivers and trajectories of social and ecological change in the Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Cherryl Walker --- Department of Sociology and Social Anthropology, South Africa Suzanne J Milton --- Wolwekraal Conservation and Research Organisation, South Africa Tim G O’Connor --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Judy M Maguire --- unaffiliated, South Africa W Richard J Dean --- Wolwekraal Conservation and Research Organisation, South AfricaThis review article explores past, present and possible future drivers of change in Karoo social-ecological systems. Biogeographically, the Karoo comprises the arid Succulent Karoo and Nama-Karoo biomes covering significant portions of the Northern Cape, Eastern Cape and Western Cape provinces... -
Introduction to the Karoo Special Issue: Trajectories of Change in the Anthropocene
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Joh R Henschel --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South Africa Cherryl Walker --- Department of Sociology and Social Anthropology, South AfricaThe Karoo is an arid to semi-arid area across the western third of South Africa, comprising the Succulent Karoo and Nama-Karoo biomes. Its environment and people have experienced considerable changes, and now face new challenges as the Anthropocene unfolds. This... -
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... -
Weed species composition and density under conservation agriculture with varying fertiliser rate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Conrad Baker --- Agricultural Research Council–Institute for Soil, Climate and Water, South Africa Ignacio C Madakadze --- Department of Plant Production and Soil Science, South Africa Corrie M Swanepoel --- Agricultural Research Council–Institute for Soil, Climate and Water, South Africa Zira Mavunganidze --- Department of Plant Production and Soil Science, South AfricaConservation agriculture (CA) is a sustainable management system that optimises yield while reducing input costs. However, reduction in tillage intensity and frequency as practised under CA generally alters weed densities and composition. The objective of the study was to evaluate... -
Zambian Invertebrate Scoring System (ZISS): A macroinvertebrate-based biotic index for rapid bioassessment of southern tropical African river systems
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HF Dallas --- Freshwater Research Centre, Scarborough, South Africa S Lowe --- University of Glasgow, Scotland MP Kennedy --- Northern Rivers Institute, School of Geosciences, England K Saili --- Department of Geography and Environmental Studies, Zambia KJ Murphy --- University of Glasgow, ScotlandAn extensive survey of tropical rivers, conducted during 2009–2012 throughout Zambia, collected 151 samples of benthic macroinvertebrates, located on 95 rivers in six of the nine freshwater ecoregions. Associated data for physico-chemistry, human activities and ecosystem stressors were collected. Data... -
Comparative skull osteology and preliminary systematic revision of the African lizard genus Heliobolus (Squamata: Lacertidae)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mirjam Dubke --- , Germany Christy A. Hipsley --- , Germany Johannes Müller --- , GermanyThe anatomy of African lacertid lizards (Lacertidae: Eremiadini) is poorly known, which has hindered a better understanding of their evolutionary relationships. This applies especially to the East African clade, which includes the genera Nucras, Latastia, Philochortus, Pseuderemias and Heliobolus. We... -
Effects of climate change on malaria morbidity and mortality in Taraba State, Nigeria
Item type: Journal Article • Journal: African Zoology • Authors: J Jonathan --- Department of Zoology and Environmental Biology, Nigeria N Ivoke --- Department of Zoology and Environmental Biology, Nigeria IO Aguzie --- Department of Zoology and Environmental Biology, Nigeria CD Nwani --- Department of Zoology and Environmental Biology, NigeriaThe study investigated the effects of climatic changes on malaria parasite prevalence, morbidity and mortality in Taraba State, Nigeria. Using a retrospective study design, the study relied on secondary data covering a period from 2005 to 2014, obtained from Meteorological... -
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,... -
Kelp forests in False Bay: urchins vs macroalgae in South Africa’s southwest coast biogeographical transition zone
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Morris --- , South Africa LK Blamey --- , South AfricaKelp forests along South Africa's southwest coast occur in a region of biogeographical overlap. Commonly referred to as transition-zone kelp forests, these dynamic ecosystems are particularly susceptible to grazing from species such as urchins. This study explores relationships between urchins... -
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... -
The presence of artificial water points structures an arid-zone avian community over small spatial scales
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Salamatu Abdu --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Alan TK Lee --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Susan J Cunningham --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaWater plays a key role in avian thermoregulation, especially when environmental temperatures approach or exceed body temperature. Birds living in arid environments need to either be adapted to life with unreliable access to water, or engage in large-scale movements to... -
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... -
The role of support groups in linking and retaining newly diagnosed clients in HIV care in a peri-urban location in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Siyabonga Kave --- Department of Rural Health, South Africa Nelisiwe F Khuzwayo --- Department of Rural Health, South Africa Abigail Hatcher --- School of Public Health, South Africa Yandisa Sikweyiya --- Gender & Health Research Unit, School of Public Health, South AfricaAlthough South Africa has the largest number of people on antiretroviral therapy (ART) in the world, many HIV clients drop out of care immediately after HIV diagnosis. This qualitative study explored the perceptions and experiences of newly diagnosed clients on... -
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,... -
Reaction of South African rye, triticale and barley forage cultivars to stem and leaf rust
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Willem HP Boshoff --- Department of Plant Sciences, South Africa Cornel M Bender --- Department of Plant Sciences, South Africa Zacharias A Pretorius --- Department of Plant Sciences, South AfricaRusts are a significant threat to sustainable wheat production in South Africa. In addition to accurate genotyping, resistance breeding and surveillance, a better understanding of the epidemiology of rust pathogens will facilitate their control. This includes an improved understanding of... -
Influence of retailers’ website system quality factors on online shopping in South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yu-Ting Hung-Joubert --- Department of Marketing and Retail Management, Cindy Erdis --- Department of Marketing and Retail Management,Online shopping, which has grown significantly over the years, has become a popular form of shopping. To succeed, it is important that online retailers ensure that their shopping websites function well and adhere to all aspects of system quality. The... -
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 determinants of self-directed referrals amongst patients at hospitals in eThekwini District, KwaZulu-Natal 2015
Item type: Journal Article • Journal: South African Family Practice • Authors: A Rajman --- Discipline of Public Health Medicine, South Africa OH Mahomed --- Discipline of Public Health Medicine, South AfricaBackground: Non-compliance with designated referral pathways has ramifications such as increased patient waiting time, overburdening of higher levels of care and increasing healthcare costs on patients and the healthcare system. The purpose of this study was to assess the determinants... -
Megabenthos and benthopelagic fishes on Southeast Atlantic seamounts
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: OA Bergstad --- Institute of Marine Research (IMR), Norway M Gil --- Departamento de Ecología y Biología Animal, Edificio de Ciencias Experimentales, Spain ÅS Høines --- Institute of Marine Research (IMR), Norway R Sarralde --- Instituto Espanol de Oceanografia, Centro Oceanografico de Canarias, Spain E Maletzky --- Ministry of Fisheries and Marine Resources, Namibia E Mostarda --- Food and Agriculture Organization of the United Nations (FAO), Italy L Singh --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa MA António --- Secretary of State of Affairs, Ministry of Agriculture, Rural Development and Fisheries, Angola F Ramil --- Departamento de Ecología y Biología Animal, Edificio de Ciencias Experimentales, Spain P Clerkin --- Pacific Shark Research Center (PSRC), Moss Landing Marine Laboratories, United States G Campanis --- South East Atlantic Fisheries Organisation (SEAFO) Secretariat, NamibiaIn a descriptive study of megafauna of several Southeast Atlantic seamounts, multiple video-transects on upper slopes and summits documented the occurrence of benthic invertebrate taxa, primarily corals, regarded as indicators of vulnerable marine ecosystems (VMEs) as defined in international guidelines... -
Describing gonad development and gametogenesis in southern Africa’s endemic box jellyfish Carybdea branchi (Cubozoa, Carybdeidae)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Mohamed --- Department of Biodiversity and Conservation Biology, South Africa H Skrypzeck --- Department of Biodiversity and Conservation Biology, South Africa MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaInformation on the reproductive development of species of box jellyfish (class Cubozoa) is poor globally, despite their significance as potent stingers and worrying projections about range expansions. While most species are confined to tropical and subtropical waters, the South African... -
Spatial considerations when monitoring reef fishes
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Parker --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa H Winker --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa ATF Bernard --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa MKS Smith --- South African National Parks, Rondevlei Scientific Services, South Africa A Götz --- South African Environmental Observation Network (SAEON), South AfricaSpatial dependence can obscure relationships between response and explanatory variables because of structuring within the residuals reducing variance and biasing coefficient estimates. Here, we highlight the influence of the spatial component, in the presence of spatial dependence, on abundance trends... -
Protected nearshore shallow and deep subtidal rocky reef communities differ in their trophic diversity but not their nutritional condition
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ER Heyns-Veale --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa NB Richoux --- Department of Zoology and Entomology, South Africa ATF Bernard --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa A Götz --- Elwandle Node, South African Environmental Observation Network (SAEON), South AfricaLarge physical changes that alter reef macrobenthos and fish assemblages occur with increasing depth, so the biological processes that regulate communities at different depths are expected to diverge. We used analyses of stable isotopes (δ13C and δ15N) and fatty acids... -
Developing a taper model for the Pinus elliottii × P. caribaea var. hondurensis hybrid in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Madeleen Algera --- Planning Department, Komatiland Forest, South Africa Christoph Kätsch --- Postgraduate Forest Programme, South Africa Paxie W Chirwa --- Postgraduate Forest Programme, South AfricaA relatively new hybrid, Pinus elliottii × P. caribaea var. hondurensis (Pexc), for which a taper model does not exist, is being planted commercially in South Africa. This study primarily focused on developing a taper model for Pexc in South... -
Listening for Johannesburg: secret affinities, wondrous resonances
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Brett Pyper --- Wits School of Arts, South AfricaAmongst the diverse music scenes that have emerged during the unfinished transition from apartheid, those that have formed within voluntary associations of jazz lovers remain a notable, if fractured and only partially audible feature of city culture around Johannesburg and... -
Current state and trajectory of design engineering in Kenya
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Hailemichael Teshome Demissie --- School of Law, EthiopiaIn the last few decades, the methods and models of engineering design practices have changed drastically due to the introduction of better technology and sophisticated design tools. Engineers are now moving away from manual design and drafting using A4 paper... -
Assessing multiple mating and reproductive skew in three species of clinid fishes (Blenniiformes: Clinidae: Clinini), in reference to multiple mating in viviparous teleosts
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MJ Scheepers --- Department of Ichthyology and Fisheries Science, South Africa G Gouws --- National Research Foundation–South African Institute for Aquatic Biodiversity (NRF–SAIAB), South AfricaThis study investigated multiple mating in three species of intertidal klipfishes (family Clinidae): super klipfish Clinus superciliosus, bluntnose klipfish Clinus cottoides, and nosestripe klipfish Muraenoclinus dorsalis. These species display the rare reproductive mode of female vivipary with superfetation, a phenomenon... -
First record of Lernaea cyprinacea (Copepoda: Lernaeidae) on an imperilled endemic anabantid, Sandelia bainsii (Teleostei: Anabantidae), from the Eastern Cape province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Chakona --- South African Institute for Aquatic Biodiversity, South Africa C Rennie --- South African Institute for Aquatic Biodiversity, South Africa WT Kadye --- Department of Ichthyology and Fisheries Science, South AfricaLernaea cyprinacea Linnaeus, 1758, the anchor worm, is reported parasitising a highly threatened anabantid fish, Sandelia bainsii, which is endemic to the Eastern Cape province of South Africa. Although L. cyprinacea was first recorded in South Africa in 1984, it... -
Developing pathways to improve smallholder agricultural productivity through ecological intensification technologies in semi-arid Limpopo, South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Farirai Rusere --- Climate System Analysis Group, Department of Environmental and Geographical Science, South Africa Siyabusa Mkuhlani --- 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 Lynn V. Dicks --- School of Biological Sciences, UKAgriculture faces an enormous global challenge of feeding nine billion people by 2050. This means a comprehensive intensification of agriculture is required. Ecological intensification is gaining momentum as a clearly defined vision for increasing agriculture productivity and sustainability. How ecological... -
Technology adoption typology and rice yield differentials in Ghana: Principal component analysis approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Franklin Nantui Mabe --- Department of Agricultural and Resource Economics, Faculty of Agribusiness and Communication Sciences, Ghana Samuel Arkoh Donkoh --- Department of Agricultural and Resource Economics, Faculty of Agribusiness and Communication Sciences, Ghana Seidu Al-Hassan --- Central Administration, GhanaThis study used primary data obtained from rice farmers in Guinea Savannah Zone (GSZ), Forest Savannah Transition Zone (FSTZ) and Coastal Savannah Zone (CSZ). Principal component analysis (PCA) was used to classify farmers into technology adopters. The study used Welch’s... -
A review of the influence of municipal sustainable supply chain management on South Africa’s recycling performance
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Fannie Machete --- College of Agriculture and Environmental Sciences, South AfricaThis paper reviews the influence of municipal sustainable chain management on South Africa’s recycling performance. In this study, municipal supply chain management systems are identified as one of the major factors that influence the lack of municipal solid waste services... -
Future prospects and challenges of intensifying dairy production systems in Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Habtamu Didanna --- Wolaita Sodo University, Ethiopia Ashenafi Wossen --- Addis Ababa University, Ethiopia Berhanu Shano --- Wolaita Sodo University, EthiopiaA number of market-oriented smallholder dairy farms have appeared mainly in the urban and peri-urban areas of Ethiopia. Dairy intensification provides both opportunities and challenges that need to be managed accordingly in order to improve milk production in a sustainable... -
The psychosocial needs of parents of adolescents who attempt suicide
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Vangi E. Ngwane --- Department of Nursing Science, Faculty of Health Sciences, South Africa Anna E. van der Wath --- Department of Nursing Science, Faculty of Health Sciences, South AfricaThis qualitative study explored and described the psychosocial needs of parents of adolescents who had recently attempted suicide. Ten purposively selected parents (females = 10; age range 29 to 59) participated in semi-structured individual interviews on their lived experiences after... -
Overcoming obstacles to a truly global psychological theory, research, and praxis in Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Seth Oppong --- Department of Psychology,In African countries, psychology as it is taught, researched, and practised contributes to epistemic injustice and epistemological violence while depriving Africans of epistemic agency. This is largely because psychology has remained and continues to remain Eurocentric. However, the continual Eurocentric... -
Factors associated with clinical outcomes among neonates admitted with acute bilirubin and hypoxic-ischaemic encephalopathies at a tertiary hospital in south-west Nigeria
Item type: Journal Article • Journal: South African Family Practice • Authors: Olusoga Babatunde Ogunfowora --- Department of Paediatrics, Nigeria Tinuade Adetutu Ogunlesi --- Department of Paediatrics, Nigeria Victor Ayodeji Ayeni --- Department of Paediatrics, NigeriaBackground: Babies who are delivered outside hospital are most at risk of serious illnesses such as perinatal asphyxia and severe hyperbilirubinaemia. These conditions are major contributors to neonatal mortalities in resource-poor settings. -
An effective learning culture: Using high performance work systems to strengthen the relationship between communities of practice and knowledge creation in Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Florence Nansubuga --- School of Psychology, Makerere University, Uganda John C Munene --- School of Psychology, Makerere University, Uganda Julius Kikooma --- School of Psychology, Makerere University, Uganda Joyce Nansamba --- School of Psychology, Makerere University, Uganda Khamis Musanje --- School of Psychology, Makerere University, UgandaThis paper sought to demonstrate how communities of practice can coalesce with high performance work systems to develop an Africanized learning culture that promotes interaction among employees and empowers them to create innovative knowledge for competitive performance. A total of... -
The taste of a healthy and sustainable diet: What is the recipe for the future?
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Peter R Klosse --- Gastronomy, Hotel Management School Maastricht, The NetherlandsThe world faces serious challenges and many of those involve current food behaviour. People have been seduced into liking food and drinks that are neither healthy nor good for the environment. Clearly we need a robust food system that is... -
The relevance of the content of an HIV and AIDS social intervention programme for the youth in the Northern Cape, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: André R Le Tape --- Department of Social Work and Criminology, South Africa Lourens S Geyer --- Department of Social Work and Criminology, South Africa Charlene L Carbonatto --- Department of Social Work and Criminology, South AfricaThe numbers of people infected with HIV and living with AIDS remain high in South Africa. The youth of the Northern Cape province in South Africa are a vulnerable population in this regard. However, there seems to be a dearth... -
Localised intermittent upwelling intensity has increased along South Africa’s south coast due to El Niño–Southern Oscillation phase state
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MI Duncan --- Department of Ichthyology and Fisheries Science, South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa AE Bates --- Department of Ocean Sciences, Canada WS Goschen --- Institute for Coastal and Marine Research, Ocean Sciences Campus, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe El Niño–Southern Oscillation (ENSO) phase state is reported to drive interannual variability in sea temperatures along South Africa’s south coast through its influence on wind-induced upwelling processes. Whether ENSO drives the intensity of localised, abrupt, intermittent upwelling is less... -
Patterns of juvenile reef-fish recruitment in Kenya’s shallow fringing- lagoon reefs
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GM Okemwa --- Kenya Marine and Fisheries Research Institute, Kenya B Kaunda-Arara --- Department of Fisheries and Aquatic Sciences, Kenya EN Kimani --- Kenya Marine and Fisheries Research Institute, KenyaStudies to understand local-scale patterns in the recruitment of juvenile coral-reef fishes within the western Indian Ocean (WIO) region are few, yet such knowledge is important in fisheries management. Underwater visual census surveys were conducted at five shallow fringing-lagoon reef... -
Comparative trophic ecology of Cape anchovy Engraulis encrasicolus and Natal anchovy Stolephorus holodon off South Africa’s east coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Horton --- Department of Biological Sciences, South Africa CD van der Lingen --- Department of Biological Sciences, South AfricaThe distributional ranges of Cape anchovy Engraulis encrasicolus and Natal anchovy Stolephorus holodon presently overlap at their eastern and western extremes, respectively, off South Africa’s east coast. These species might become more strongly sympatric as a consequence of changed distributions... -
Behavioural analysis of Village Weavers Ploceus cucullatus in an Ethiopian breeding colony during early incubation: 2. Males
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Khaleda Khan --- Department of Biology, Queens College, USA Bobby Habig --- Department of Biology, Queens College, USA David C Lahti --- Department of Biology, Queens College, USAWe observed a colony of Village Weavers Ploceus cucullatus in Ethiopia at the height of the breeding season to assess variation and relationships amongst male behaviours. Individuals spent most of their time on behaviours functioning in acquiring and retaining mates,... -
Progress in diabetes care in the KwaZulu-Natal public health sector: a decade of analysis
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: N Sahadew --- Clinical and Professional Practice, Nelson R Mandela School of Medicine, South Africa VS Singaram --- Clinical and Professional Practice, Nelson R Mandela School of Medicine, South AfricaAims: This study analysed diabetes-related information routinely collected by the KwaZulu-Natal (KZN) Department of Health (DOH). -
Assessment of persistent organochlorine compounds contamination on the Lake Victoria water and sediments: a case study in Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Wenaty --- Department of Food Technology, Nutrition and Consumer Sciences, Tanzania F Mabiki --- Department of Chemistry and Physics, Tanzania B Chove --- Department of Food Technology, Nutrition and Consumer Sciences, Tanzania R Mdegela --- Department of Veterinary Medicine and Public Health, TanzaniaThe current study was conducted to establish the levels of organochlorine pesticides (OCPs), its degradation products, and indicatory polychlorinated biphenyls (PCBs) in water and sediments from Lake Victoria in Tanzania. Seven indicator PCBs were identified in sediments, and five were... -
Diet of Glossogobius callidus (Teleostei: Gobiidae) in freshwater impoundments in the Sundays River Valley of the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mofu --- Department of Ichthyology and Fisheries Science, South Africa DJ Woodford --- Centre for Invasion Biology, School of Animal, Plant and Environmental Sciences, South Africa RJ Wasserman --- South African Institute for Aquatic Biodiversity, South Africa T Dalu --- South African Institute for Aquatic Biodiversity, South Africa OLF Weyl --- Department of Ichthyology and Fisheries Science, South AfricaDespite the high abundance of the gobiid fish Glossogobius callidus in many freshwater ecosystems in South Africa, very few studies have assessed the biology and ecology of the species. Here, we investigated the diet of G. callidus populations sourced from... -
Stem volume and tree biomass harvested by different thinning intensities from dense and sparse karee stands in Central Bushveld, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Kassahun T Maru --- Department of General Forestry, Wondo Genet College of Forestry and Natural Resources, Ethiopia Coert J Geldenhuys --- Department of Plant and Soil Sciences, South Africa Paxie W Chirwa --- SAFCOL Forest Chair for Forest Postgraduate Programme, Department of Plant and Soil Sciences, South AfricaThe aim of this study was to determine the aboveground stem volume and tree biomass of the multi-stemmed karee tree (Searsia lancea) for its potential use for producing wood chips and/or pellets. A stratified random sampling was done, by selecting... -
Changes in decomposition rate and litterfall in riparian zones with different basal area of exotic Eucalyptus in south-eastern Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Glaucia Regina Santos --- Department of Forest Science, Brazil Marina Shinkai Gentil Otto --- Department of Forest Science, Brazil José Raimundo de Souza Passos --- Department of Biostatistics, Brazil Felipe Ferreira Onofre --- Department of Forest Science, Brazil Valdemir Antônio Rodrigues --- Department of Forest Science, Brazil Felipe Rossetti de Paula --- Department of Forest Science, Brazil Silvio Frosini de Barros Ferraz --- Department of Forest Science, BrazilExotic species in riparian environments can influence the quantity and quality of litterfall in the ecological system. The objective of this study was to evaluate the influence of Eucalyptus leaves on litterfall and terrestrial and aquatic leaf decomposition in a... -
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... -
The state of costing research for HIV interventions in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Drew B Cameron --- Health Policy and Management, USA Mohamed Mustafa Diab --- Institute for Health Policy Studies, USA Lauren N Carroll --- Institute for Health Policy Studies, USA Lori A Bollinger --- Avenir Health, USA Willyanne DeCormier Plosky --- Avenir Health, USA Carol Levin --- Department of Global Health, USA Benjamin Herzel --- Institute for Health Policy Studies, USA Elliot Marseille --- Health Strategies International, USA Lily Alexander --- Department of Global Health, USA Sergio Bautista-Arredondo --- Division of Health Economics and Health Systems Innovations, Mexico Carlos Pineda-Antunez --- Division of Health Economics and Health Systems Innovations, Mexico Diego Cerecero-García --- Division of Health Economics and Health Systems Innovations, Mexico Gabriela B Gomez --- London School of Hygiene and Tropical Medicine, United Kingdom William H Dow --- Health Policy and Management, USA James G Kahn --- Institute for Health Policy Studies, USAThe past decade has seen a growing emphasis on the production of high-quality costing data to improve the efficiency and cost-effectiveness of global health interventions. The need for such data is especially important for decision making and priority setting across... -
Developing the Global Health Cost Consortium Unit Cost Study Repository for HIV and TB: methodology and lessons learned
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Willyanne DeCormier Plosky --- Avenir Health, USA Lori A Bollinger --- Avenir Health, USA Lily Alexander --- Department of Global Health, USA Drew B Cameron --- Department of Health Policy and Management, USA Lauren N Carroll --- Philip R Lee Institute for Health Policy Studies, USA Lucy Cunnama --- Health Economics Unit, South Africa Gabriela B Gomez --- Centre for Health Economics, London School of Hygiene and Tropical Medicine, United Kingdom Carol Levin --- Department of Global Health, USA Elliot Marseille --- Health Strategies International, USA Mohamed Mustafa Diab --- Philip R Lee Institute for Health Policy Studies, USA Mariana Siapka --- Centre for Health Economics, London School of Hygiene and Tropical Medicine, United Kingdom Edina Sinanovic --- Health Economics Unit, South Africa Anna Vassall --- Centre for Health Economics, London School of Hygiene and Tropical Medicine, United Kingdom James G Kahn --- Philip R Lee Institute for Health Policy Studies, USAConsistently defined, accurate, and easily accessible cost data are a valuable resource to inform efficiency analyses, budget preparation, and sustainability planning in global health. The Global Health Cost Consortium (GHCC) designed the Unit Cost Study Repository (UCSR) to be a... -
Which delivery model innovations can support sustainable HIV treatment?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Caroline A Bulstra --- Erasmus Medical Centre, Department of Public Health, The Netherlands Jan AC Hontelez --- Erasmus Medical Centre, Department of Public Health, The Netherlands Osondu Ogbuoji --- Center for Policy Impact in Global Health, USA Till Bärnighausen --- Institute of Global Health, University of Heidelberg, GermanyThe rapid scale-up of antiretroviral treatment (ART) for HIV since the mid-2000s, mostly through disease-specific or “vertical” programmes, has been a highly successful undertaking, which averted millions of deaths and prevented many new infections. However, the dynamics of the HIV... -
“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... -
Water quality assessment using benthic macroinvertebrates as bioindicators in streams and rivers around Sebeta, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Mezgebu --- Department of Fisheries and Aquatic Sciences, Ethiopia A Lakew --- National Fisheries and Aquatic Life Research centre, Ethiopia B Lemma --- Department of Zoological Sciences, EthiopiaThe increasing impact of human activities on the freshwater-bodies of Ethiopia requires an efficient and cost-effective method for ecological health assessment. In the current study, benthic macroinvertebrates were used to assess the impact of different stressors originating from industries and... -
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... -
Spatial modelling of cumulative human pressure in the tropical coastscape of Zanzibar, Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ZA Khamis --- Department of Geography and Geology, Finland R Kalliola --- Department of Geography and Geology, Finland N Käyhkö --- Department of Geography and Geology, FinlandCoastal landscapes and seascapes (‘coastscapes’) are under immense anthropogenic pressures emanating from multiple human activities. We applied spatial modelling to characterise the cumulative pressures in the coastscape of Zanzibar’s main island Unguja (hereafter Zanzibar), in the western Indian Ocean. We... -
A tale of two habitats: preliminary comparison of fish abundance and diversity between saltmarsh- and mangrove-dominated creeks in the Nahoon Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Keur --- Department of Biodiversity and Conservation Biology, Faculty of Natural Science, South Africa N James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa A Rajkaran --- Department of Biodiversity and Conservation Biology, Faculty of Natural Science, South AfricaA preliminary assessment of abundance and richness of fishes utilising saltmarsh and mangrove habitats in the Nahoon Estuary, situated on the eastern coast of South Africa, was undertaken during July 2017. The structural composition and complexity of the two habitats... -
Interactive effect of planting date and fertiliser application on maize growth and yield under dryland conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Dolapo B Akinnuoye-Adelabu --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South Africa Tafadzwanashe Mabhaudhi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South Africa Albert T Modi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaUnderstanding the relationships among management practices during planting period will help producers to improve crop production under climate change. The interaction of planting date and soil fertility on maize yield was evaluated. Field trials were conducted during summer in 2014/15... -
The status and conservation of the Cape Gannet Morus capensis
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Richard B Sherley --- Environment and Sustainability Institute/Centre for Ecology and Conservation, United Kingdom Robert JM Crawford --- Department of Environment, Forestry and Fisheries (DEFF), South Africa Bruce M Dyer --- Department of Environment, Forestry and Fisheries (DEFF), South Africa Jessica Kemper --- African Penguin Conservation Project, Namibia Azwianewi B Makhado --- Department of Environment, Forestry and Fisheries (DEFF), South Africa Makhudu Masotla --- Department of Environment, Forestry and Fisheries (DEFF), South Africa Lorien Pichegru --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Pierre A Pistorius --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Jean-Paul Roux --- Ministry of Fisheries and Marine Resources, Namibia Peter G Ryan --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Desmond Tom --- Ministry of Fisheries and Marine Resources, Namibia Leshia Upfold --- Department of Environment, Forestry and Fisheries (DEFF), South Africa Henning Winker --- Department of Environment, Forestry and Fisheries (DEFF), South AfricaThe Cape Gannet Morus capensis is one of several seabird species endemic to the Benguela upwelling ecosystem (BUS) but whose population has recently decreased, leading to an unfavourable IUCN Red List assessment. Application of ‘JARA’ (‘Just Another Red-List Assessment,’ 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... -
Are macroeconomic factors adequate proxies for systematic influences in stock returns? A South African perspective
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Jan J. Szczygielski --- Department of Financial Management, Gauteng, South Africa Leon M. Brümmer --- Department of Financial Management, Gauteng, South Africa Hendrik P. Wolmarans --- Department of Financial Management, Gauteng, South Africa Adam Zaremba --- Dubai Business School, United Arab EmiratesWe investigate whether macroeconomic factors adequately proxy for systematic influences in stock returns within the South African context. We also investigate whether a commonly used solution to factor omission in macroeconomic factor models, the residual market factor, adequately reflects systematic... -
Breeding ecology of the Cream-coloured Courser in Cape Verde
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Romy Rice --- Department of Evolutionary Zoology and Human Biology, Hungary José O Valdebenito --- Milner Centre for Evolution, United Kingdom Meinolf Ottensmann --- Department of Animal Behaviour, Germany Noémie Engel --- Department of Evolutionary Zoology and Human Biology, Hungary Andreia Adrião --- Maio Biodiversity Foundation, Republic of Cape Verde Tamás Székely --- Department of Evolutionary Zoology and Human Biology, HungaryThe Cream-coloured Courser Cursorius cursor exsul is a data-deficient shorebird distributed across Eurasia and Africa. The subspecies exsul is endemic to the Cape Verde archipelago. In contrast with their mainland breeding sites, where coursers appear to be nomadic and rare... -
Recent droughts in the Kruger National Park as reflected in the extreme climate index
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Johan Malherbe --- , South Africa Izak PJ Smit --- , South Africa Konrad J Wessels --- , United States Philip J Beukes --- , South AfricaAssociated with the 2015/2016 El Niño, extreme drought occurred over the Lowveld of South Africa. The area includes the Kruger National Park (KNP). Significant die-offs of a mega herbivore species occurred, corroborated by census data in KNP. The drought situation... -
Drought amnesia: lessons from protected areas in the eastern Lowveld of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mike JS Peel --- , South Africa Izak P Smit --- , South AfricaProtected areas (PAs) adjacent to the Kruger National Park (KNP) are divided into fenced and unfenced properties. We discuss land-use development to provide context of how these savannas have evolved over the past century. Although the PAs have embraced the... -
Higher education institutions, private sector and government collaboration for innovation within the framework of the Triple Helix Model
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Wanjiru Gachie --- Discipline of Computer Science Education, University of KwaZulu-Natal, Durban, South AfricaThis research aims at contributing to a broader comprehension of the nature of the Triple Helix Model within the National System of Innovation. The research hence undertakes an exploration and explanation of the nature of existing or absence thereof of... -
The primacy of innovation capacities in the NIS of the Maghreb countries: An analysis in terms of learning capacity in Morocco, Tunisia and Algeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Vanessa Casadella --- Department of Economics, France Rédha Younes Bouacida --- Faculty of Economics, Business and Management Sciences, Department of Economic Sciences, AlgeriaThe building of innovative capacities has become essential in the objectives of development and economic growth. While there has been a lot of literature on the construction and analysis of innovation systems in the Maghreb economies, it is less common... -
Reflections and refractions on Sakai/Moodle learning management system in developing countries: A case of Ghanaian universities’ demand and supply perspective analyses
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Moses Kumi Asamoah --- Department of Theology and Education, Central University, GhanaTechnological advancement has revolutionized teaching and learning in the twenty-first century. However, the full benefits are yet to be realized and clearly understood due to user experience data paucity, especially in developing countries. This study delves into the issue from... -
The development and implementation of a management plan for the Seekoei Estuary, South Africa: a case study guided by socio-economic issues
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TH Wooldridge --- Department of Zoology and Institute for Coastal and Marine Research, South Africa JB Adams --- Department of Botany and Institute for Coastal and Marine Research, South AfricaThe large Temporarily Closed Seekoei Estuary has a long history of poor management. In 1969, a swimming pool complex was built in a position impinging on the mouth. The construction of a 500 m causeway across the lagoon connecting the... -
Physico-chemical and microalgal gradients change rapidly in response to mouth closure in a predominantly open estuary
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DA Lemley --- Botany Department and the Institute for Coastal and Marine Research, South Africa JB Adams --- Botany Department and the Institute for Coastal and Marine Research, South AfricaA third of South Africa’s freshwater flow no longer reaches the coast, yet few systems have shifted from being permanently open to temporarily closed. For the first time since 1969, the Gamtoos Estuary mouth closed in June 2018, because of... -
An Estuary Ecosystem Classification that encompasses biogeography and a high diversity of types in support of protection and management
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L van Niekerk --- Council for Scientific and Industrial Research (CSIR), South Africa JB Adams --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa NC James --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa SJ Lamberth --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa CF MacKay --- Oceanographic Research Institute, SAAMBR, South Africa JK Turpie --- South African Institute for Aquatic Biodiversity, South Africa A Rajkaran --- Biodiversity and Conservation Biology, South Africa SP Weerts --- Council for Scientific and Industrial Research (CSIR), South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity, South AfricaFor nearly three decades, the Whitfield (1992) characterisation scheme served as a reference framework to type South African estuaries. We outline a revised ecosystem classification scheme that incorporates biogeographical zonation and introduces new types. Coastal outlets were re-categorised as estuaries... -
Dispositions of agency as explanatory mechanisms of employees’ satisfaction with retention practices
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Khatoon Gani --- Department of Human Resource Management, South Africa Ingrid Potgieter --- Department of Human Resource Management, South Africa Melinde Coetzee --- Department of Industrial and Organisational Psychology, South AfricaThis study explored the explanatory power of psychological dispositions of agency (i.e. employability attributes and organisational commitment) in relation to employees’ satisfaction with organisational retention practices. Participants were a convenience sample of employees from a higher education academic institution in... -
Suicide attempt and associated factors among in-school adolescents in Mozambique
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- ASEAN Institute for Health Development, Mahidol University, Thailand Karl Peltzer --- Department for Management of Science and Technology Development, VietnamThe study estimated the prevalence and correlates of suicide attempts in the past year in adolescents in Mozambique. We utilised a cross-sectional national secondary data set (N = 1 918; median age 15 years, interquartile range =3 years) from the... -
Plant-parasitic nematode assemblages associated with glyphosate tolerant and conventional soybean cultivars in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: A Mbatyoti --- Unit for Environmental Sciences and Management, South Africa MS Daneel --- Agricultural Research Council-Tropical and Subtropical Crops, South Africa A Swart --- Agricultural Research Council-Plant Health and Protection, South Africa M Marais --- Agricultural Research Council-Plant Health and Protection, South Africa D De Waele --- Unit for Environmental Sciences and Management, South Africa H Fourie --- Unit for Environmental Sciences and Management, South AfricaInformation about the non-target effects of glyphosate, a broad-spectrum systemic herbicide on soil-borne nematodes is scarce and not well documented for South African agricultural fields. In the present study, the abundance and identity of plant-parasitic nematodes in roots and rhizosphere... -
Comparative methods for predicting cyanide pollution in artisanal small-scale gold mining catchment by using logistic regression and kriging with GIS
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: L. C. Razanamahandry --- International Institute for Water and Environmental Engineering (2iE), Department of Water and Sanitary Engineering, Laboratory of Water, Burkina Faso P. M. Digbeu --- International Institute for Water and Environmental Engineering (2iE), Department of Water and Sanitary Engineering, Laboratory of Water, Burkina Faso H. A. Andrianisa --- International Institute for Water and Environmental Engineering (2iE), Department of Water and Sanitary Engineering, Laboratory of Water, Burkina Faso H. Karoui --- International Institute for Water and Environmental Engineering (2iE), Department of Water and Sanitary Engineering, Laboratory of Water, Burkina Faso J. Podgorski --- Swiss Federal Institute of Aquatic Science and Technology (EAWAG), Switzerland E. Manikandan --- UNESCO-UNISA Africa Chair in Nanoscience’s/Nanotechnology Laboratories (U2AC2N), College of Graduate Studies, South Africa M. Maaza --- UNESCO-UNISA Africa Chair in Nanoscience’s/Nanotechnology Laboratories (U2AC2N), College of Graduate Studies, South Africa H. Yacouba --- International Institute for Water and Environmental Engineering (2iE), Department of Water and Sanitary Engineering, Laboratory of Water, Burkina FasoIt has been reported that persistent cyanide pollution occurs in artisanal small-scale gold mining (ASGM) catchment areas in Burkina Faso. In the present study, logistic regression (LR) and Regression Kriging (RK) methods were applied to predict cyanide pollution hazard at... -
Haematology and biochemistry values for Temminck’s pangolins (Smutsia temminckii) from Zimbabwe
Item type: Journal Article • Journal: African Zoology • Authors: Ellen Connelly --- , Zimbabwe Lisa Hywood --- , Zimbabwe Mark Donaldson --- , Zimbabwe Darren W Pietersen --- , ZimbabweBlood biochemistry values are routinely employed during clinical examinations to assess the health of the patient and to identify potential underlying conditions. No blood biochemistry data are currently available for Temminck’s pangolin (Smutsia temminckii), a species that is being confiscated... -
Sub-Saharan African cultural belief system and entrepreneurial activities: A Ghanaian perspective
Item type: Journal Article • Journal: Africa Journal of Management • Authors: William K. Darley --- , Charles Blankson --- , USAThis article seeks to advance our understanding of the culture-entrepreneurship relationship from an African perspective by examining how six African traditional beliefs either promote or hinder entrepreneurial activities. These six traditional Ghanaian cultural beliefs (i.e. belief in godliness, belief in... -
Promoting rainwater harvesting for improving water security: Analysis of drivers and barriers in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mavis Akuffobea-Essilfie --- , Ghana Portia Adade Williams --- , Ghana Roland Asare --- , Ghana Sigrid Damman --- , Norway George Owusu Essegbey --- , GhanaThe study explored strategies and means of achieving wider acceptability and adoption of roof rainwater harvesting (RWH) systems in Ghana to improve water security and availability. The paper employed a qualitative approach in analyzing views expressed by a wide range... -
Project-based learning to encourage parental involvement in promoting indigenous technology in schools
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Khazamula J. Maluleka --- , South AfricaThe Department of Basic Education requests teachers to use the design process as teaching methodology in Technology Education. Learners’ completion of projects poses a challenge for teachers, who are supposed to ensure that their learners undertake a project as part... -
Supporting innovation through a multi-level platforms approach: A case study of the South African fresh fruit industry
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Richmore Dondofema --- , South Africa Sara S. (Saartjie) Grobbelaar --- , South AfricaAgricultural innovation platforms have become recognized as a key mechanism through which to stimulate innovation for inclusive development (I4ID) by serving as a space for agricultural stakeholders to engage, and to develop and diffuse agricultural innovations. This study investigates how... -
Modelling spillover effects between the UK and the US stock markets over the period 1935–2020
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Olalekan Aladesanmi --- , United KingdomThis study investigates the spillovers of shocks and volatilities between the UK and the US stock markets over the period 1935–2020. The empirical analysis is carried out for the full sample and four subsample periods by applying the asymmetric GARCH-BEKK... -
On the challenges of making a sustainable kitchen: experimenting with sustainable food principles for restaurants
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Matheus Alves Zanella --- , SwitzerlandConcerns with the sustainability of food have moved from the margins of the gastronomy world to a much more central stage, mirroring a growing concern by citizens around food origins, carbon footprint and social practices in value chains. Evolving literature... -
The effect of cadmium toxicity on Oreochromis niloticus and human health
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Abougabal --- , Egypt WA Moselhy --- , Egypt FMM Korni --- , EgyptCadmium levels below permissible limits can be toxic, affecting the health of exposed aquatic organisms and ultimately human health. Although cause and effect links between aquatic organisms and human health have not been elicidated, this study evaluated the effect of... -
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... -
Stand structure, regeneration and seed dispersal patterns of Nothofagus glauca (Hualo) in central Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rafael Navarro-Cerrillo --- , España Antonio Cabrera-Ariza --- , Chile Antonio Avaria --- , Chile Guillermo Palacios-Rodríguez --- , España Rómulo Santelices-Moya --- , ChileGrowing interest in functional silviculture is promoting new approaches to the study of seed dispersal and regeneration, two of the key processes that determine the structure and dynamics of plant populations. Nothofagus glauca is an obligate-seeding tree species typical of... -
Chlorophyll a fluorescence as an indicator of heat stress in cotton (Gossypium hirsutum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MM van der Westhuizen --- , South Africa DM Oosterhuis --- , USA JM Berner --- , South Africa N Boogaers --- , South AfricaCotton (Gossypium hirsutum L.) is a major fibre crop that is greatly affected by climatic factors, especially drought and high temperatures. Excessive temperature (above 30 °C) during the reproductive stage (flowering) negatively affects cotton yield potential. Four diverse cotton genotypes... -
Clean energy transition in a developing society: Perspectives on the socioeconomic determinants of Solar Home Systems adoption among urban households in southeastern Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Edlyne Eze Anugwom --- , Nigeria Kenechukwu Nwakego Anugwom --- , Nigeria Oliver Ifeanyi Eya --- , NigeriaThis study identifies factors that constrain the adoption of clean energy sources by urban households in southeastern Nigeria, using the Solar Home Systems (SHS) as a case study. It is premised on the assumption that adoption of innovation is affected... -
Spatio-temporal distribution of organochlorine pesticide residues in water and sediments of tropical reservoirs: a case study of Bui Reservoir, Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SB Jidauna --- , Ghana R Edziyie --- , Ghana BB Campion --- , GhanaThis study investigated the spatio-temporal distribution of organochlorine pesticides (OCPs) in water and sediments of the Bui Reservoir from June 2017 to May 2018, to provide baseline data for monitoring contamination in the Reservoir. Samples were collected during four seasons... -
Trends in chemical pollution and ecological status of Lake Ziway, Ethiopia: a review focussing on nutrients, metals and pesticides
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LB Merga --- , The Netherlands AA Mengistie --- , Ethiopia JH Faber --- , The Netherlands PJ Van den Brink --- , The NetherlandsAquatic ecosystems contribute to human well-being by delivering ecosystem services, but their protection has been given low priority in Africa. Lake Ziway in the Ethiopian Rift Valley basin provides services including irrigation, drinking water and fish food in the region... -
Water hyacinth (Eichhornia crassipes) affects the composition and abundance of zooplankton in the littoral region of Koka Reservoir, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Getnet --- , Ethiopia D Kifle --- , Ethiopia T Fetahi --- , EthiopiaWater hyacinth, Eichhornia crassipes (Martius) Solms 1883, is a rampant invasive aquatic plant that is recognised as one of the ten worst weeds in the world. Its appearance in Koka Reservoir was reported in 1965 and since then it has... -
Trends in shore-based angling effort determined from aerial surveys: a case study from KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- , South Africa JB Mann-Lang --- , South AfricaUnderstanding the spatiotemporal characteristics of effort is a critical component of managing fisheries. Recreational shore-angling is the largest sector of the linefishery and one of the primary recreational activities undertaken along the coast of KwaZulu-Natal (KZN), South Africa. The aim... -
Accounting for linefish dependency in management of the South African small pelagic fishery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Parker --- , South Africa JC Coetzee --- , South Africa H Winker --- , South Africa CD van der Lingen --- , South AfricaTo further implement an ecosystem approach to management of the small pelagic fishery in South Africa, we attempted to develop functional relationships between spatialised time-series of the biomass of three small pelagic fish species and the catch per unit effort... -
Life-history trade-offs among four sympatric seabreams
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CG Attwood --- , South Africa HAM Ensair --- , South AfricaFish life history is shaped by environmental and ecological circumstances but constrained by phylogeny. Life-history trade-offs can be exposed in a comparison of closely related species with similar niches. We compare the life histories of four closely related and similar-sized,... -
A STEEP-cum-SWOT approach for maintenance strategy evaluation for an off-grid PV-powered street lighting system
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Desmond Eseoghene Ighravwe --- , Nigeria Moses Olubayo Babatunde --- , Nigeria Iheanacho Henry Denwigwe --- , Nigeria Daniel Osezua Aikhuele --- , NigeriaRecently, the installation of street light systems in remote communities has experienced significant improvement. This improvement has a direct relationship with the innovations in off-grid standalone energy sources. However, there exists sparse information on standalone PV-powered street light system maintenance... -
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... -
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... -
Effects of nest management methods on hatching success and predation rates of hawksbill turtles on Cousine Island, Seychelles
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Gane --- , South Africa CT Downs --- , South Africa I Olivier --- , South Africa M Brown --- , South AfricaSea turtle populations have declined globally and are of conservation concern. We investigated the effects of nest management methods on hatching success and egg/hatchling predation rates of hawksbill turtles Eretmochelys imbricata on Cousine Island, Seychelles. We determined the effectiveness of... -
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... -
Improving SMEs’ performance using innovative knowledge and financial system designed from the Moroccan business environment
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Hicham Rachidi --- , Morocco Mohammed El Mohajir --- , MoroccoInformation and communication technologies are considered real vectors of corporate performance. However, their adoption by small and medium sized organizations is hampered by unreported or unknown obstacles. As part of a new approach, and rather than opting for a purely... -
Evaluation of temperature effects on grade 20 concrete using response surface methodology
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Richie I. Umasabor --- , NigeriaThis paper examined the evaluation of temperature effects on grade 20 concrete using response surface methodology. An experimental research design was adopted, which produced fifty-one (51) concrete specimens. The specimens were cured and tested at 7, 18, and 28 days,... -
Seasonal variance in water quality, trace metals and infection variables of Cichlidogyrus philander Douëllou, 1993 (Monogenea, Ancyrocephalidae) infecting the gills of Pseudocrenilabrus philander (Weber, 1897) in the Padda Dam, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Patience C Igeh --- , South Africa Beric M Gilbert --- , South Africa Annemariè Avenant-Oldewage --- , South AfricaIncreasing awareness of deteriorating health of aquatic ecosystems, as a result of human activities, has led to the suggestion that fish host-parasite relationships are possible bioindicators of environmental pollution. This study examined the impact of water quality and trace elements... -
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... -
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... -
Sturdiness and scuffle in deploying educational technologies for teaching and learning in a low-technology context: Students’ experience in a developing society
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Moses Kumi Asamoah --- , GhanaThis paper explores the experience of a sample of thirty post-graduate students of University of Ghana, Legon regarding the use of Sakai Learning Management System (LMS) in enhancing students’ interactions with instructors, peers, course contents and in enabling flexible 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... -
Potential impact of marine heatwaves on selected phytoplankton adapted to the Gulf of Guinea during stable hydrographic periods
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Acheampong --- , Ghana P Mantey --- , Ghana A Weremfo --- , GhanaReports suggest that the Gulf of Guinea (northeastern tropical Atlantic) frequently experiences marine heatwaves (MHW)—prolonged periods of anomalously warm seawater—of ≥1.5 °C above baseline. We assessed the likely impact of this anomaly on two microalgae, Thalassiosira weissflogii (diatom) and Gymnodinium... -
Natural regeneration status and soil seed bank composition in IITA Forest Reserve, Ibadan, Oyo State, Nigeria
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Bright Danso Appiagyei --- , Nigeria Akinyele O Adejoke --- , NigeriaThe International Institute of Tropical Agriculture (IITA) Forest Reserve is a secondary rainforest that has been protected since 1965. It serves as a refuge for many species that were once common but have declined, due to urbanisation and population pressure... -
Reliability and quality of artificial nectar feeders for birds in the Cape Floristic Region
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Anina Coetzee --- , South Africa Phoebe Barnard --- , South Africa Anton Pauw --- , South AfricaSupplementary feeding of birds may have considerable ecological and evolutionary effects on bird communities. However, there is a lack of basic information on the prevalence, frequency and quality of supplementary feeders, especially in African urban areas. Here we describe the... -
A psychobiographical study of Temujin’s (Genghis Khan) personality
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bao Xiaohong --- , China Dong Jia --- , China Zheng Jianhong --- , ChinaThis psychobiography study of Temujin employed the Personality Adjective Evaluation Scale, the Personality Adjective Classification Survey, and the Delphi method to characterise Temujin’s personality traits and probable influences. One hundred and thirty-two participants rated Temujin’s personality on 248 evaluation words,... -
Effects of fragmented mangroves on macrozoobenthos: a case study of mangrove clearance for powerline right-of-way at Oproama Creek, Niger Delta, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Zabbey --- , Nigeria IG Ekpenyong --- , Nigeria GN Nwipie --- , Nigeria IC Davies --- , Nigeria K Sam --- , NigeriaMangroves are vulnerable to varying magnitudes of degrading impact by human activities. Despite the many benefits of mangrove ecosystems, mangroves in the Niger Delta region are often cleared for electric powerline and oil pipeline rights-of-way, recreation, road construction, housing and... -
Can bait improve the efficiency of underwater video monitoring of fish in headwater streams? A case study from the Rondegat River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SZ Bajaba --- , South Africa S Hugo --- , South Africa AJ van Wyk --- , South Africa SM Marr --- , South Africa NG Vine --- , South Africa OLF Weyl --- , South AfricaThe use of action cameras for underwater video sampling provides a non-harmful alternative for monitoring endangered and threatened fish populations in clear headwater streams. Here, we examine the use of baited remote underwater video systems (BRUVS) for the monitoring of... -
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... -
Honeybush (Cyclopia spp.) anther-stigma distance and intraspecies cross compatibilities
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Jenifer Koen --- , South Africa Martha M. Slabbert --- , South Africa Mardé Booyse --- , South Africa Cecilia Bester --- , South AfricaSpecies of Cyclopia are used to produce honeybush tea, a uniquely South African beverage that is rapidly growing in popularity locally and abroad. In response to warnings about ecological sustainability, the honeybush industry is transitioning from a wild-harvested source model... -
Earthworm diversity and density as affected by soil and climatic factors in Raymond Mhlaba municipality, Eastern Cape province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sixolise Mcinga --- , South Africa Alen Manyevere --- , South Africa P Mnkeni --- , TanzaniaEarthworms play a key role in improving soil health, and their diversity and density are mainly affected by soil and climatic factors. This study determined the effects of rainfall, temperature and selected soil properties on the diversity and density of... -
Diversity of benthic macroinvertebrates in anthropogenically disturbed Aturukuku River, Eastern Uganda
Item type: Journal Article • Journal: African Zoology • Authors: Hannington Ochieng --- , Uganda Willy P Gandhi --- , Uganda Godfrey Magezi --- , Uganda James Okot-Okumu --- , Uganda Robinson Odong --- , UgandaBiodiversity conservation has focused on large vertebrates and plants with pronounced economic value, compared with smaller organisms such as benthic macroinvertebrates that play a particular role in freshwater ecosystems. The increasing loss and degradation of freshwater habitats, coupled with low... -
Stakeholders’ perceptions of mammal occurrence and abundance on agricultural properties bordering the Boland Mountain Complex, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Willem A Nieman --- , South Africa Brittany C Schultz --- , South Africa Anita Wilkinson --- , South Africa Alison J Leslie --- , South AfricaThe encroachment of agricultural landscapes on natural ecosystems poses a significant threat to native wildlife persistence. In the Boland Mountain Complex (BMC), the presence of mammals was well documented in the 20th century, but an updated account is lacking. This... -
Diversity pattern of bats (Mammalia: Chiroptera) in a modified tropical environment in the western region of Cameroon
Item type: Journal Article • Journal: African Zoology • Authors: Manfothang Dongmo Ervis --- , Cameroon Bakwo Fils Eric-Moise --- , Cameroon Mongombe Manga Aaron --- , Cameroon Atagana Patrick Jules --- , Cameroon Tchuenguem Fohouo Fernand-Nestor --- , CameroonThe western region of Cameroon is one of the leading agricultural production areas in sub-Saharan Africa, and this ongoing anthropogenic perturbation has led to the replacement of natural forests with agroecosystems. Such anthropogenic landscape transformations may have affected bat species... -
Temporal partitioning of diurnal bird and nocturnal small mammal visitors to a winter flowering endemic succulent
Item type: Journal Article • Journal: African Zoology • Authors: Stephanie L Payne --- , South Africa Craig T Symes --- , South Africa Ed TF Witkowski --- , South AfricaFloral nectar is an important attractant and reward for visitors, and is often produced in synchrony with peak activity of pollinators. Aloe peglerae flowers in winter, and previous studies have shown that it is pollinated primarily by diurnal generalist birds,... -
Traditional green leafy vegetables as underutilised sources of micronutrients in a rural farming community in south-west Nigeria II: consumption pattern and potential contribution to micronutrient requirements
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Shirley Isibhakhomen Ejoh --- , France Faustina Dufie Wireko-Manu --- , France David Page --- , France Catherine MGC Renard --- , FranceObjective: To determine the consumption pattern of selected households consuming traditional green leafy vegetables (TGLVs) during three seasons and potential contribution to recommended nutrient intakes. -
Comparison of the particle size distributions of sediment collected from sandy seafloor using a Van Veen grab and cone dredge
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GM van der Heever --- , South Africa LJ Atkinson --- , South Africa CEO von der Meden --- , South AfricaSediment particle size is an important environmental parameter that influences benthic species composition and is frequently used in habitat and ecosystem classification systems. In South Africa, benthic grabs are regularly used to collect seafloor sediment samples for particle size analysis... -
Are there long-term temporal trends of size composition and the length– weight relationship? Results for chokka squid Loligo reynaudii during the peak spawning season off the south coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MR Lipiński --- , South Africa MA Mmethi --- , South Africa D Yemane --- , South Africa J Githaiga-Mwicigi --- , South Africa WHH Sauer --- , South AfricaTemporal trends in the size composition (length frequency) and length–weight (L–W) relationship of chokka squid Loligo reynaudii on the south coast of South Africa were assessed over periods spanning 22 years: length frequencies from 1996 to 2017 (with 15 years... -
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... -
When cooling is worse than warming: investigations into the thermal tolerance of an endemic reef fish, Boopsoidea inornata
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Allison --- , South Africa C Muller --- , South Africa A-R Childs --- , South Africa W Froneman --- , South Africa LA Bailey --- , South Africa WM Potts --- , South AfricaRecent investigations suggest that global warming is likely to alter temperature regimes along the southeastern coastline of South Africa through the increased frequency of upwelling events. Identifying thermal thresholds is fundamental in predicting the response of marine ectotherms to rapidly... -
When the flathead mullet left St Lucia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AK Whitfield --- , South AfricaThe St Lucia estuarine system on the east coast of South Africa is a declared World Heritage Site and Ramsar Site of International Importance. A major ecological feature of St Lucia during the last century was the annual spawning migration... -
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,... -
Long-term wheat production management effects on soil fertility indicators in the semi-arid eastern Free State, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Palo Francis Loke --- , South Africa Johannes Jacobus Schimper --- , South Africa Elmarie Kotzé --- , South Africa Christiaan Cornelius du Preez --- , South AfricaThis study evaluated temporal effects of wheat production management practices on soil fertility under semi-arid conditions. Treatments applied for 37 years included straw management (unburned and burned), tillage practices (no-tillage, stubble mulch, and mouldboard ploughing) and weed control methods (chemical... -
The innovation system for diffusion of small wind in Kenya: Strong, weak or absent? A technological innovation system analysis
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Faith Hamala Wandera --- , KenyaKenya is currently seeking to promote rural electrification through a decentralized approach for deploying renewable energy. This article asks whether an innovation system is in place to support the diffusion of small wind which could complement rural electrification using solar... -
Industrial symbiosis in Tanzania: A case study from the sugar industry
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Amani G. Rweyendela --- , Tanzania William J. S. Mwegoha --- , TanzaniaThe concept of industrial symbiosis (IS) offers enormous potential for more sustainable manufacturing processes. This paper sets out to explore the IS forms occurring at a case study of the Kilombero Sugar Company Limited (KSCL), the largest sugar refinery in... -
Walking with herders: following into the multispecies classroom
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: William Ellis --- , South Africa Clement Cupido --- , South Africa Mogamat Igshaan Samuels --- , South AfricaThe recently developed walking ethnography, or go-along method, to study pastoralists in a participatory manner provides data that the usual sit-down interview is unable to realise, not least because it shifts the power dynamic between researcher and researched. The herder’s... -
Blaming the father: witchcraft, de-industrialisation and generation in South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Isak Niehaus --- , United KingdomSocial researchers associate paradoxical developments in post-apartheid South Africa — such as increased hardship at a time of heightened expectations — with a proliferation in witchcraft accusations. This article examines this postulate in greater depth, drawing upon multi-temporal ethnographic fieldwork... -
Diel activity patterns of two syntopic range-restricted geckos suggest idiosyncratic responses to climate change
Item type: Journal Article • Journal: African Zoology • Authors: MA Petford --- , South Africa GJ Alexander --- , South AfricaMeasures of activity patterns in relation to environmental conditions provide insights into ecologically driven requirements and climate preferences of species, particularly for ectotherms, due to the strong relationship between body temperature (Tb) and environmental temperatures. Lygodactylus incognitus (cryptic dwarf gecko)... -
An innovation intermediary for Nairobi, Kenya: Designing student-centric services for university-industry collaboration
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mikko Koria --- , United Kingdom Roberto Hinojosa Osorno --- , Mexico Ida Telalbasic --- , United Kingdom Delia del Carmen Ramírez Vázquez --- , Mexico Emmy Chirchir --- , KenyaEngaging students as partners in university-industry collaboration (UIC) through challenge-based and real-life projects creates significant value for all participants through novel educational approaches, talent recruitment, user-driven innovation, new resources, and research-related opportunities. However, as these practices have developed iteratively over... -
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... -
A critical review of macroinvertebrate-based bioassessment approaches in Africa’s lotic systems: developments, challenges, and legal requirements
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: John Peter Obubu --- , Ethiopia Seyoum Mengistou --- , Ethiopia Tadesse Fetahi --- , Ethiopia Wolfram Graf --- , Austria Robinson Odong --- , UgandaWorldwide, water resources have an impact on all forms of life as lotic systems are networks that interconnect water resources and land. They are important for navigation, water supplies, agriculture, recreation, and industrial development and help to regulate changes in... -
Conservation Agriculture farming systems in rainfed annual crop production in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R van Antwerpen --- , South Africa MC Laker --- , South Africa DJ Beukes --- , South Africa JJ Botha --- , South Africa A Collett --- , South Africa M du Plessis --- , South AfricaSouth Africa is, relative to the rest of the world, a water scarce country with a limited amount of arable land, especially land with a long-term sustainable agricultural production potential. Agriculture should therefore focus on the implementation of soil and... -
Increasing resilience to the SARS-CoV-2 virus and other health threats in food-insecure communities
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Karen Morris --- , South Africa Thandi Puoane --- , South AfricaThe health of the majority of South Africa’s population is seriously threatened by hunger and micronutrient deficiency, with impaired immune response a real threat, which the current SARSCoV-2 virus pandemic has highlighted. Traditional household food-processing techniques can, amongst other advantages,... -
Changes in vegetation structure, aboveground biomass and soil quality in response to traditional grazing land management practices in the central highlands of Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Teklu Wegi --- , Ethiopia Abubeker Hassen --- , South Africa Melkamu Bezabih --- , Ethiopia Adugna Tolera --- , EthiopiaDespite shrinking pastureland in the central highlands of Ethiopia, as a result of cropping, there has been little detailed work to evaluate effects of traditional grazing land management practices on vegetation and soil attributes. This study aimed to quantify vegetation... -
Modelled effects of grazing strategies on native grass production, animal intake and growth in Brahman steers
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Walter Svinurai --- , South Africa Abubeker Hassen --- , South Africa Eyob Tesfamariam --- , South Africa Abel Ramoelo --- , South AfricaInadequate information about the long-term effects of grazing strategies on native grass production and animal growth poses limitations to sustainable management of beef cattle. A 20-year simulation study was conducted using the Sustainable Grazing Systems model to analyse implications of... -
The effect of the adoption of International Financial Reporting Standards on foreign portfolio investment in Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Matthew Olubayo Omotoso --- , South Africa Daniël Petrus Schutte --- , South Africa Merwe Oberholzer --- , South AfricaThe adoption and implementation of International Financial Reporting Standards (IFRS) are anticipated to enhance the quality and credibility of financial statement in terms of reliability, transparency and comparability. Consequently, it presupposes improving the functioning of the capital market and influence... -
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... -
Sustainable disposal of the dead: A study of Nigambodh Ghat in Delhi
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Vishwambhar Nath Prajapati --- , IndiaThe link between values and technologies is well established. The concept of sustainability here includes the desire to dispose of the dead in an easy, eco-friendly manner. Many authors have discussed sustainability and its relation to the various methods of... -
Agricultural advisory and extension service approaches and inclusion in reaching out to Kenyan rural farmers
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ann N. Kingiri --- , KenyaEfficient agricultural advisory and extension service (AES) is poised to lead to improved agricultural productivity as farmers utilize information and knowledge to optimize their use of limited resources. However, the role of AES has progressively evolved due to the changing... -
Modes of innovation used by SMMEs to tackle social challenges in South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nokuthula Lukhele --- , South Africa Ogundiran Soumonni --- , South AfricaInnovation has become critical for many countries in the Global South, particularly in responding to challenges such as slow economic growth, primary commodity dependence, and socio-economic inequalities. Since 1996, the National System of Innovation (NSI) approach has been adopted by... -
Fundamental analysis, low accruals, and the accrual anomaly: Korean evidence
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Young Jun Kim --- , Republic of Korea Jung Hoon Kim --- , USA Sewon Kwon --- , Republic of Korea Su Jeong Lee --- , Republic of KoreaPrior studies in Korea document that low accrual firms yield extremely low returns, driving away abnormal returns of an accrual-based trading strategy. We examine whether the performance of an accrual-based trading strategy can be improved using fundamental analysis to distinguish... -
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... -
Sponges as simple biomonitoring tools for trace element pollution in marine environments: insights from a Kenyan study focused on the leaf sponge Phyllospongia foliascens
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BO Ohowa --- , Kenya LI Kiteresi --- , Kenya VW Wanjeri --- , Kenya SM Mwamburi --- , Kenya SL Tunje --- , KenyaThe potential of the marine leaf sponge Phyllospongia foliascens as a simple biomonitor of trace element pollution was assessed. The concentrations of arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), manganese (Mn) and zinc (Zn) in sediments and in P... -
Are Cape Cormorants Phalacrocorax capensis losing the competition? Dietary overlap with commercial fisheries
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: OB Masiko --- , South Africa PG Ryan --- , South Africa CD van der Lingen --- , South Africa L Upfold --- , South Africa S Somhlaba --- , South Africa M Masotla --- , South Africa Y Geja --- , South Africa BM Dyer --- , South Africa RJM Crawford --- , South Africa AB Makhado --- , South AfricaCape Cormorants Phalacrocorax capensis breed in southern Africa’s Benguela upwelling system and in 2013 were listed as Endangered by the IUCN following a population decrease of >50% over their three most recent generations. This decrease was associated with reduced prey... -
Interactions among actors in improved rice varieties innovation system in the Eastern Zone of Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sospeter J. Charles --- , Tanzania Amon Z. Mattee --- , Tanzania Catherine P. Msuya-Bengesi --- , TanzaniaThe concept of IS has gained importance in understanding the interactions among actors as determinants of innovation. Determinants of innovation are not viewed individually but within the context of a complex IS involving many actors and interactions. Therefore, this study... -
Assessing the finance led growth hypothesis: Empirical evidence from sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kore Marc Guei --- , South Africa Ireen Choga --- , South AfricaFinancial development and economic growth nexus is still an ongoing debate. Several studies have indicated the positive benefits associated with enhancing financial development. Nevertheless, more work can still be done to reap the full benefits of financial development. With growing... -
Strengthening intermediaries in the National System of Innovation (NSI): Case of the South African Council for Natural Scientific Professions
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bongiwe Mncwango --- , South Africa Samuel Fongwa --- , South AfricaThis paper uses the National System of Innovation (NSI) framework to interrogate the role of professional organizations as intermediaries within the South African NSI. Using the case of the South African Council for Natural Scientific Professions (SACNASP), we explore the... -
Sedimentary charcoal studies from southern Africa’s grassy biomes: a potential resource for informing the management of fires and ecosystems
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Abraham N Dabengwa --- , South Africa Sally Archibald --- , South Africa Jemma Finch --- , South Africa Louis Scott --- , South Africa Lindsey Gillson --- , South Africa William J Bond --- , South AfricaAfrican grassy biomes evolved together with fire and have a long history of human manipulation of fire, yet few rangeland studies acknowledge the role of prehistoric fire in shaping contemporary ecological patterns. Nevertheless, prehistoric fire records have been used elsewhere... -
Parental decision-making in infant and child male circumcision: a case study in two townships in Gauteng, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Eurica Palmer --- , South Africa Lochner Marais --- , South Africa Michelle Engelbrecht --- , South AfricaParental decision-making in infant and child male circumcision is influenced by complex, interrelated factors on many levels. Several studies have highlighted reasons for the acceptance and non-acceptance of child male circumcision. This study investigates the factors that influence parental decision-making... -
Development of a multimetric index for assessing the ecological integrity of some selected rivers and streams in the north-eastern part of Lake Tana sub-basin, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Amelework Zewudu --- , Ethiopia Getachew Beneberu --- , Ethiopia Minwyelet Minigst --- , Ethiopia Amare Mezgebu --- , EthiopiaA multimetric index was developed using benthic macroinvertebrates to assess the ecological health of selected rivers and streams in the north-eastern part of Lake Tana subbasin, Ethiopia. One-time extensive sampling was carried out during the post-rainy season (November–December) of 2016... -
Macrophyte species diversity and distribution in relation to water quality of the Cheleleka Wetland in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Haymanot Tesfaye --- , Ethiopia Bikila Warkineh --- , EthiopiaThe Cheleleka Wetland is located in the Ethiopian Rift Valley on the upper shore of Lake Hawassa, after which the regional capital is named. This study investigated the relationship between water quality and the occurrence and diversity of macrophyte species... -
Cattle performance with Brachiaria and Panicum maximum forages in an integrated crop-livestock system
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mariana Borges de Castro Dias --- , Brazil Kátia Aparecida de Pinho Costa --- , Brazil Eduardo da Costa Severiano --- , Brazil Ubirajara Oliveira Bilego --- , Brazil Lourival Vilela --- , Brazil Wender Ferreira de Souza --- , Brazil Itamar Pereira de Oliveira --- , Brazil Ana Carolina Gomes da Silva --- , BrazilCrop-livestock integration is an efficient technique that enables cropping and animal production in the same area, takes advantage of all the benefits that this synergism provides, and results in greater sustainability and lower environmental impact. The objectives of this study... -
Technology and innovation trajectories in the Rwandan Agriculture sector: Are value chains an option?
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Parfait Yongabo --- , SwedenTechnology and innovation are important in addressing complex problems in the agricultural sector in many developing communities. However, ways and mechanisms to integrate them in the agricultural sector are still a challenge due to the lack of clear pathways and... -
Factors affecting interactions between different key actors in improved rice varieties innovation system in the Eastern Zone of Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sospeter J. Charles --- , Iringa, Tanzania Amon Z. Mattee --- , Tanzania Catherine P. Msuya-Bengesi --- , TanzaniaThis study examines factors affecting the interactions between different key actors in the innovation system of improved rice varieties in the Eastern Zone of Tanzania. A parallel mixed design was used to collect the data from a sample of 340... -
Contribution of temperate germplasm to the performance of maize hybrids under stress and non-stress environments in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sphiwokuhle Shandu --- , South Africa Edmore Gasura --- , Zimbabwe Kingstone Mashingaidze --- , South Africa John Derera --- , South AfricaIncreases in genetic gains are crucial to maize breeding programmes. The objectives of this study were to identify higher-yielding and stable maize hybrids across stress and non-stress environments, to identify representative test environments for testing and selection of superior maize... -
Variation of the relationships between lengths and weights applied to 123 fish species observed at Réunion Island (Indian Ocean)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Roos --- , Réunion J Taconet --- , Réunion C Gentil --- , Réunion B Brisset --- , Réunion H Evano --- , Réunion Y Aumond --- , Réunion J Huet --- , Réunion C Lepetit --- , Réunion R Boymond-Morales --- , Réunion T Rungassamy --- , Réunion R Elleboode --- , France K Mahé --- , FranceBody length–weight (L–W) relationships of 123 fish species (122 Actinopterygii and 1 Elasmobranchii) were studied from 10 218 individuals caught around Réunion Island from 2000 to 2021. All species, except for 4 with a very small number of individuals and... -
Supporting marine spatial planning with an ecosystem model of Algoa Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Ortega-Cisneros --- , South Africa E Weigum --- , South Africa R Chalmers --- , South Africa S Grusd --- , South Africa AT Lombard --- , South Africa L Shannon --- , South AfricaThe Ecopath with Ecosim (EwE) modelling framework was used to develop a model of Algoa Bay and test the ecosystem impacts of the implementation of the Addo Elephant National Park Marine Protected Area (MPA). The Ecopath model included 37 functional... -
Older black rural South African adults’ perceptions on organ donation: An exploratory study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Monareng Moropa --- , South Africa Jabu Mokwena --- , South Africa Mpsanyana Makgahlela --- , South Africa Tholene Sodi --- , South AfricaIn this study, we explored older rural South African adults’ perceptions of organ donation. Twelve older Pedi adults (male = 50%; age range 51 to 78 years) completed in-depth interviews on their knowledge of organ donation, cultural views, and influences... -
Barriers to development of entrepreneurial ecosystems and economic performance in Southern Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Beverlley Madzikanda --- , People’s Republic of China Cai Li --- , People’s Republic of China Francis Tang Dabuo --- , People’s Republic of ChinaSouthern Africa has fewer innovative entrepreneurs per capita than other regions of Africa and a high failure rate amongst SMEs. Common problems such as corruption, crime and poverty plague the region, and as a result many of the economies do... -
Effect of changing business R&D expenditure mix on productivity of the South African national system of innovation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Juniours Marire --- , South AfricaThe paper examines the effect of the sharp reallocation of business R&D expenditure from experimental research to applied research, since the global financial crisis, on the productivity of the South African national system of innovation (NSI). Business R&D expenditure declined... -
Evolution of Iran’s gas turbine sectoral innovation system as a complex product system (CoPS)
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mostafa Safdari Ranjbar --- , Iran Soroush Ghazinoori --- , Iran Manochehr Manteghi --- , IranMany scholars have studied various sectoral innovation systems that are categorized as mass-produced goods, whereas there are only a few previous studies that have investigated complex product systems (CoPS). CoPS are defined as high-cost, engineering, and software-intensive goods, systems, networks,... -
Aggregate dynamics and intra-aggregate carbon contents as influenced by long-term wheat production management in semi-arid South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: LS Tlomatsana --- , South Africa PF Loke --- , South Africa E Kotzé --- , South Africa MP Aghoghovwia --- , South AfricaSoil aggregate dynamics have received renewed interest due to their relevance in carbon (C) stabilisation. This study evaluated changes in aggregate-size distribution and intra-aggregate C following 41 years of wheat production in semi-arid central South Africa. Management practices that have... -
Prevalence study of type 2 diabetes mellitus in the Ashanti region of Ghana: a systematic review of risk factors
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Daniel Katey --- , Ghana Abigail Akua Addo --- , Ghana Kabila Abass --- , Ghana Anthony Kwame Morgan --- , Ghana -
An Android-based mobile platform for understanding Residential PV system sizing
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Iheanacho Henry Denwigwe --- University of Lagos, Nigeria Joseph Dare Akinde-Peters --- University of Lagos, Nigeria Olubayo Moses Babatunde --- University of Lagos, Nigeria Oluwaseye Samson Adedoja --- Kogi State University Campus, Nigeria Ibrahim Abiola Taiwo --- Bournemouth University, UK Toyosi Beatrice Adedoja --- Cooperative Information Network (COPINE), NASRDA, OAU Campus, NigeriaThis research study presents the design of a mobile Android application which provides efficient PV sizing recommendations for residential users. The paper aims to promote the adoption of solar energy to meet energy demands for residential use, by providing accurate... -
Local perceptions and sociocultural value of Hooded Vultures Necrosyrtes monachus in Burkina Faso, West Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Clément Daboné --- University Centre of Tenkodogo/University Thomas Sankara, Burkina Faso Adama Ouéda --- University Joseph Ki-Zerbo, Burkina Faso Lindy J Thompson --- , South Africa Jacques Boco Adjakpa --- University of Abomey-Calavi, Benin Peter DM Weesie --- University of Groningen, The NetherlandsHooded Vultures have suffered from dramatic population declines in recent decades owing to anthropogenic pressures. To properly address this threat, the sociocultural perspectives towards this species should be considered. We examined peoples' perceptions, knowledge and beliefs on Hooded Vulture's sociocultural... -
Effect of nutrition education on nutritional status and serum zinc level of HIV and AIDS clients: implication for care in resource-limited settings
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ifeyinwa Ezenwosu --- , Nigeria Osita Ezenwosu --- , Nigeria Chinyere Mbachu --- , Nigeria Ijeoma Itanyi --- , Nigeria Emmanuel Aguwa --- , NigeriaBackground: People living with HIV or AIDS in resource-limited settings are faced with challenges in their nutrition and micronutrient levels. This study aimed to determine the effect of nutrition education on the nutrition status and serum zinc level of HIV... -
Nutrient use efficiency in commercial eucalypt plantations in different soils under temperate climate
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Alejandro González --- , Uruguay Jorge Hernández --- , Uruguay Amabelia del Pino --- , Uruguay Andrés Hirigoyen --- , UruguayThe sustainability of forest production is based on an adequate balance between soil nutrient supply and its demand by forest plantations, which may vary depending on the species and the site. In Uruguay, the low to medium fertility of the... -
Gradual increase in the intensity of machine traffic in timber harvesting: effects on soil composition and functionality
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Miriam Fernanda Rodrigues --- , Brazil Diego Rodrigues --- , Brazil André Pellegrini --- , Brazil Elisandra Pocojeski --- , BrazilThis study describes the effects of gradually increasing the intensity of machine traffic in timber harvesting of Pinus taeda L. in a cut-to-length system on the severity of compaction and changes in functionality of a subtropical Oxisol in southern Brazil... -
Nematode community structure and distribution along the Kenyan continental shelf
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SM Hashim --- University of Nairobi, Kenya AWN Muthumbi --- University of Nairobi, Kenya JM Githaiga --- University of Nairobi, Kenya J Okondo --- Kenya Marine and Fisheries Research Institute (KMFRI), KenyaMeiofauna communities were analysed from samples collected at four stations on the Kenyan continental shelf (Shimoni, Kwale, Mombasa and Kilifi) during the maiden cruise of the RV Mtafiti, 12–21 December 2015. Nematodes were identified to genus level, and their distribution... -
An indicator-based approach for cross-realm coastal biodiversity assessments
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LR Harris --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa AL Skowno --- South African National Biodiversity Institute (SANBI), South Africa KJ Sink --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa L van Niekerk --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa SD Holness --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa M Monyeki --- South African National Biodiversity Institute (SANBI), South Africa P Majiedt --- South African National Biodiversity Institute (SANBI), South AfricaEcosystem status assessments are generally separated into realm-specific analyses (terrestrial, freshwater, estuarine or marine), but without integrating these into a coherent assessment of coastal biodiversity across the land–sea interface. Trends in assessment indicators in coastal versus non-coastal areas have also... -
On the identity of west Saharan geckos of the Tarentola ephippiata complex (Squamata: Phyllodactylidae), with comments on an extreme case of syntopy with their close relative T. annularis
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Thore Koppetsch --- Zoologisches Forschungsmuseum Alexander Koenig, Germany Wolfgang Böhme --- Zoologisches Forschungsmuseum Alexander Koenig, GermanyTarentola geckos have a widespread geographic distribution and occur both in the Palearctic and Afrotropical realms, as well as the Neotropical region. Particularly, across North Africa phenotypically similar and cryptic species can be found, like the west Saharan members of... -
A comparative review of decision support tools routinely used by selected transboundary River Basin Organisations
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Bukhari --- , South Africa CA Brown --- , South AfricaAs human pressures on water resources increase, the data and decision support (DS) tools used in the governance, development and management of transboundary rivers are likely to become increasingly important. There are no universal, standardised selection processes or designs for... -
A protocol and tools for setting environmental water temperature guidelines for perennial rivers in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Helen Dallas --- , South Africa Nicholas Rivers-Moore --- , South AfricaHuman activities have cumulatively altered natural thermal regimes, with impacts and occurrences of extreme events amplified and exacerbated by global climate change. This leads to cascading ecological impacts in river systems. This paper translates knowledge generated over more than ten... -
The contribution and value of the trait-based approach to water resource protection
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Oghenekaro Nelson Odume --- , South AfricaFreshwater is one of the Earth’s most crucial resources for social-economic development and prosperity. Biomonitoring contributes to water resource protection by integrating a holistic picture of ecosystem health through an analysis of resident biota. The taxonomy-based approach, in which taxa... -
DRIFT: incorporating an eco-social system network and time series approach into environmental flow assessments
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AR Joubert --- , South Africa CA Brown --- , South Africa JM King --- , South Africa H Beuster --- , South Africa A Greyling --- , South AfricaDRIFT (Downstream Response to Imposed Flow Transformation) is an interactive, ecological-social process and software package to assist with environmental flow assessments and river management decision-making. It was originally developed in the 1990s and has subsequently evolved and been applied in... -
Climate smart technology for storage of fresh pro-vitamin A bio-fortified cassava
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olumuyiwa Adekanmi Babarinsa --- , Nigeria Isaac Babatunde Oluwalana --- , Nigeria Mathew Kolawole Bolade --- , NigeriaClimate change is a problem affecting food security across the globe. The climate change effect of rising temperatures can be mitigated by using climate-smart crops such as cassava and climate-smart technology such as an Evaporative Cooling Structure (ECS). A 150 kg... -
Preliminary study on improved postharvest practices for tomato loss reduction in Nigeria, Rwanda and India
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olubukola Motunrayo Odeyemi --- , Nigeria Lisa Kitinoja --- , USA Neeru Dubey --- , India Solange Musanase --- , Rwanda Gurbinder Singh Gill --- , USATomato production is increasing along with postharvest losses in Nigeria, Rwanda and India. Modified Commodity Systems Assessment Methodology on tomato was conducted in the study areas during the July – August 2017 harvest season to evaluate the costs and benefits... -
Innovation policy for economic development: The difficult but promising adequacy in the case of Senegal
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Vanessa Casadella --- , France Sofiane Tahi --- , FranceWe use the National Innovation System (NIS) approach to analyze the performance of innovation policy of the sub-Saharan economy: the Senegal. The NIS approach makes it possible to understand how actors create and disseminate new knowledge, in a context of... -
Comparison of physico-chemical parameters with macroinvertebrate and vertebrate fauna of Lake Ogelube and Lake Ojii, Opi-Agu, south-eastern Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IE Onah --- , OJ Ajanwachukwu --- , PO Ubachukwu --- ,The physico-chemical parameters of water provide crucial information on the condition of a waterbody at a point in time. Physico-chemical parameters determine the primary and secondary productivity of an aquatic ecosystem. Data on water temperature, pH, turbidity, water depth, total... -
Comparison of oxidative stress biomarkers in Oreochromis mossambicus in minimally and highly disturbed aquatic environments in the Matabeleland region, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Z Makuvara --- , Zimbabwe J Marumure --- , Zimbabwe L Chapungu --- , Zimbabwe J Machingura --- , South Africa AH Siwela --- , ZimbabweOwing to their ability to provide a functional measure of organismal response to chemical stressors, oxidative biomarkers are useful in ecotoxicological studies to assess disturbance in aquatic environments. This study assessed the use of oxidative stress biomarkers in Oreochromis mossambicus... -
Factors affecting the adoption and usage of electronic tax system in Ethiopia in the case of Addis Ababa city large taxpayers
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mathewos Woldemariam Birru --- Wolaita Sodo University, EthiopiaThe aim of this research is to assess the adoption and usage of electronic tax system in the case of large taxpayers in Addis Ababa city through the implementation of unified theory of acceptance and use of technology (UTAUT) model... -
Ghana’s pineapple innovation history: An account from stakeholders in Nsawam Adoagyiri Municipal Assembly
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel Adu Ankrah --- School of Agriculture, University of Ghana, GhanaDespite the pineapple fruit contributing significantly towards Ghana’s non-traditional export, the empirical space deficiently accounts for innovations within the sector. This article addresses prime questions that beg answering such as: the origin of innovations, when, how, what conditions facilitate adoption... -
Management barriers to innovation performance in Nigerian manufacturing sector
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Waliu M. Adegbite --- College of Business & Economics, University of Johannesburg, South Africa Cookie M. Govender --- College of Business & Economics, University of Johannesburg, South AfricaInnovation is an essential strategy for businesses to increase performance and profitability. While current literature focuses on technology and other technical barriers to innovation, many businesses in developing countries are unaware of the significance of organizational policy and practices on... -
Height growth strategies of Mimosa scabrella along a chronosequence
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Vinicius Costa Cysneiros --- Federal University of Paraná, Brazil Sebastião do Amaral Machado --- Federal University of Paraná, Brazil Allan Libanio Pelissari --- Federal University of Paraná, Brazil Edilson Urbano --- State University of Mato Grosso do Sul, Aquidauana University Unit, BrazilAssessing variations in tree allometry is useful for understanding height growth strategies in relation to life-history trajectories, light competition and environmental restrictions. Scaling exponent and asymptotic heights obtained from height–diameter (HD) models may elucidate how trees optimise growth strategies and... -
Factors associated with single and multiple suicide attempts in adolescent school children in Morocco: A national cross-sectional survey
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- University of the Free State, South Africa Supa Pengpid --- Mahidol University, ThailandThe study aimed to assess factors associated with multiple suicide attempts (MSA) in adolescents with a history of suicide attempts in Morocco. National cross-sectional data from the Global School-Based Student Health Survey (GSHS) in Morocco in 2016 were analysed. Students... -
Low constant temperature drying can be a satisfactory method to determinethe moisture content of impermeable seed coated species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ganesh K Jaganathan --- University of Shanghai for Science and Technology, China Jiajin Li --- University of Shanghai for Science and Technology, China Baolin Liu --- University of Shanghai for Science and Technology, ChinaThe International Seed Testing Association (ISTA) recommends two methods for seed moisture content determination: high constant temperature drying, carried out at 130 °C for 1, 2, 3 or 4 hours, and low constant temperature drying, carried out at 103 °C... -
Assessment of the acoustic change in heat-treated Pinus elliottii and Bertholletia excelsa wood from homogeneous plantations in Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Daiana Sousa de Jesus --- Federal Rural University of Rio de Janeiro, Brazil Jonnys Paz Castro --- Federal Rural University of Rio de Janeiro, Brazil Taiane Guedes --- Universidade Federal de Lavras, Brazil José Reinaldo Moreira da Silva --- Universidade Federal de Lavras, Brazil João Vicente de Figueiredo Latorraca --- Federal Rural University of Rio de Janeiro, Brazil Alexandre Miguel do Nascimento --- Federal Rural University of Rio de Janeiro, BrazilHeat treatment has been used in wood to improve its technological properties, but due to the complex nature of wood, it is necessary to carry out analyses to confirm the changes, and also to investigate which temperatures and protocols are... -
A study of local government HIV/AIDS projects in South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Leon Swartz --- Population and Development Research, Niel Roux --- Directorate: Population and Development Research,The primary goal of this study was to survey local government HIV/AIDS projects in South Africa. A total of 240 questionnaires were sent to local municipalities nationally between May and July 2002. A total of 44 municipalities returned their questionnaires,... -
Willingness to pay for treatment with highly active antiretroviral (HAART) drugs: a rural case study in Cameroon
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Kenneth Ngwambokong Muko --- Catholic Health Service of the archdiocese of Bamenda, Valentine Che Ngwa --- St James University Hospital, UK Leslie Chigang --- St Louis Clinic Bamenda, Igbinosum Gladys Ngwa --- St Martin De Porres Hospital, Anke Meiburg --- St Martin De Porres Hospital, Elvis Neba Shu --- Department of pharmacology, College of Medicine, University of Nigeria Nsukka,This paper reports on the willingness of HIV/AIDS patients to pay for the most affordable triple therapy combination of antiretrovirals in a local setting in Cameroon. Questionnaires were used to evaluate willingness to pay, and patients who could still afford... -
Preventing mother-to-child transmission: factors affecting mothers' choice of feeding — a case study from Cameroon
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Kenneth Ngwambokong Muko --- Catholic Health Service, Archdiocese of Bamenda, Cameroon Koubitim Ginnette Tchangwe --- St Martin de Porres Hospital, Valentine Che Ngwa --- St James University Hospital, UK Laah Njoya --- Fundong District Hospital, CameroonThis paper reports on factors influencing the decision of mothers regarding the type of feeding method for their babies in a rural setting in Cameroon. The aim of the study was to ascertain the proportion of mothers choosing the different... -
Estimates of eligibility for antiretroviral treatment (ART) and projected ART impact on AIDS mortality among South African educators
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Thomas M Rehle --- HSRC's Social Aspects of HIV/AIDS and Health Programme, Olive Shisana --- South African Human Sciences Research Council,The study assessed the proportion of HIV-infected educators that need antiretroviral treatment (ART) according to current criteria, and estimated the impact of ART on AIDS mortality by modelling scenarios with and without access to ART. Specimens for HIV testing were... -
Social support and health behaviour in women living with HIV in KwaZulu-Natal
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Bernhard Gaede --- Emmaus Hospital, Sisana Majeke --- School of Nursing, University of KwaZulu-Natal, Rugira Regis Marie Modeste --- School of Nursing, University of KwaZulu-Natal, Joanne Rachel Naidoo --- School of Nursing, University of KwaZulu-Natal, Mokete Joseph Titus --- Department of Obstetrics and Gynaecology, Prince Mshiyeni Memorial Hospital in Umlazi, Leana R Uys --- College of Health Sciences, University of KwaZulu-Natal,The article explores the relationship between social support and health behaviour of rural and urban women who are living with HIV in South Africa. Our study was a descriptive survey of a group of pregnant and non-pregnant women living with... -
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... -
The use of culturally themed HIV messages and their implications for future behaviour change communication campaigns: the case of Botswana
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Oleosi Ntshebe --- Department of Population Studies, University of Botswana, Joseph M.N. Pitso --- Department of Population Studies, University of Botswana, Alinah Kelo Segobye --- University of Botswana,The ‘ABC’ approach promoted at the beginning of the HIV/AIDS epidemic in Botswana has failed to yield significant behaviour change. Formative research was conducted in urban, semi-urban and rural areas to explore how the use of sociocultural messages depicted in... -
HIV/AIDS prevention through peer education and support in secondary schools in South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Maretha Visser --- Department of Psychology, University of Pretoria,The implementation and evaluation of a peer education and support programme in secondary schools to prevent and reduce high-risk sexual behaviour amongst adolescents is discussed. The aims of the programme were to provide accurate information about HIV/AIDS, discuss and reconsider... -
Sexual behaviour and condom use among university students in Madagascar
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Onja Holisoa Rahamefy --- Research and Training Laboratory of Medical Biology, Faculty of Medicine, University of Antananarivo, Michèle Rivard --- Department of Social and Preventive Medicine, University of Montreal, Madeleine Ravaoarinoro --- Department of Microbiology and Immunology, University of Montreal, Lala Ranaivoharisoa --- Faculty of Medicine, University of Antananarivo, Andriamiliharison Jean Rasamindrakotroka --- Faculty of Medicine, University of Antananarivo, Richard Morisset --- Faculty of Medicine, University of Montreal,Although the number of known HIV-infected students in Madagascar increased significantly between 1989 and 1995, very little is known about student behaviour with regard to AIDS. The study objectives were: to describe Malagasy students' sexual behaviour and condom use; to... -
Establishing support groups for HIV-infected women: Using experiences to develop guiding principles for project implementation
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Maretha Visser --- Department of Psychology, University of Pretoria, Jonathan Mundell --- Kalafong Hospital,HIV-infected women need support to deal with their diagnosis as well as with the stigma attached to HIV. As part of their practical training, Master's-level psychology students negotiated with the staff of four clinics in townships in Tshwane, South Africa,... -
Condom use as part of the wider HIV prevention strategy: Experiences from communities in the North West Province, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Marije Versteeg --- University of Pretoria, Montagu Murray --- Functional Household Programme at the Faculty of Theology, University of Pretoria,Correct and consistent condom usage remains a pivotal strategy in reaching the target set by the South African government to reduce new HIV infections by 50% in the next 5 years. Studies have found that there has been an increase... -
Rapid assessment of drug use and sexual HIV risk patterns among vulnerable drugusing populations in Cape Town, Durban and Pretoria, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Charles Parry --- Alcohol and Drug Abuse Research Unit (ADARU), South African Medical Research Council (MRC), Petal Petersen --- ADARU/MRC, Tara Carney --- ADARU/MRC, Sarah Dewing [B0004] Richard Needle --- Vulnerable Populations Project of the Global AIDS Program (GAP), Centers of Disease Control,This exploratory study examines the links between drug use and high-risk sexual practices and HIV in vulnerable drug-using populations in South Africa, including commercial sex workers (CSWs), men who have sex with men (MSM), injecting drug users (IDUs) and non-injecting... -
Barriers and facilitators to patients' adherence to antiretroviral treatment in Zambia: a qualitative study
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Nawa Sanjobo --- Copperbelt University, Jan C Frich --- Research Unit for General Practice, University of Oslo, Atle Fretheim --- Preventive and International Health Care Unit, Norwegian Knowledge Centre for Health Services, NorwayPatients' adherence to antiretroviral therapy (ART) is important for effective medical treatment of HIV/AIDS. We conducted a qualitative interview study in the Copperbelt Province of Zambia in 2006. The aim of the study was to explore patients' and health care... -
SISTA South Africa: The adaptation of an efficacious HIV prevention trial conducted with African-American women for isiXhosa-speaking South African women
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Dorina Saleh-Onoya [CXX0001] Nikia Danette Braxton --- Rollins School of Public Health Department of Behavioral Sciences and Health Education, Emory University , Sibusiso Sifunda --- Health Promotion R & D Unit, Medical Research Council (MRC), Priscilla Reddy --- Health Promotion R & D Unit, Medical Research Council (MRC), Robert Ruiter --- Maastricht University, Bart van den Borne [B0006] Tiffany Pennick Walters --- Emory University Rollins School of Public Health, Delia Lang --- Rollins School of Public Health Department of Behavioral Sciences and Health Education, Emory University , Gina M Wingood --- Department of Behavioral Science and Health Education, Rollins School of Public Health,Although new HIV treatments continue to offer hope for individuals living with HIV, behavioural interventions shown to reduce HIV risk behaviour remain one of the most powerful tools in curbing the HIV epidemic. Unfortunately, the development of evidencebased HIV interventions... -
Gender differences in university students' HIV/AIDS-related knowledge and sexual behaviours in Malawi: a pilot study
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Pierson RT Ntata --- Chancellor College, University of Malawi, Adamson S Muula --- Flinders University Medical School, Australia Seter Siziya --- Medical Biostatistics in the School of Medicine, University of Zambia, Edrinnie E Kayambazinthu --- English Department, Chancellor College, University of Medicine,A cross-sectional study was conducted among first-year university students in Malawi to determine distributions of HIV/AIDS related knowledge, and sexual behaviours. A total of 314 (199 male and 115 female) students were eligible to participate, and of these 221 (70.4%)... -
HIV/AIDS and Indian youth - a review of the literature (1980 – 2008)
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Anita Nath --- , IndiaThe main objective of this article is to provide a comprehensive overview of the situation regarding HIV/AIDS among youth in India, and explore the possible strategies that could be effective in combating the spread of this disease. India is in... -
Ethical and practical challenges in implementing informed consent in HIV/AIDS clinical trials in developing or resource-limited countries
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Kyriaki Mystakidou --- Department of Radiology, Areteion Hospital, University of Athens, Irene Panagiotou --- Athens Medical School, Stelios Katsaragakis --- Pain Relief and Palliative Care Unit, Department of Radiology, Areteion Hospital, School of Medicine, University of Athens, Eleni Tsilika --- Department of Radiology, University of Athens at Areteion Hospital in the Pain Relief and Palliative Care Unit, Efi Parpa --- Department of Radiology, University of Athens at Areteion Hospital in the Pain Relief and Palliative Care Unit,Background/rationale: Ethical issues regarding HIV/AIDS human research in the developing world remain under continuous evaluation; a critical area of concern includes informed consent. This paper reviews several of the most important ethical and practical aspects of informed consent in HIV... -
Sexual risk reduction among Zambian couples
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Ndashi Chitalu --- Department of Medicine, University of Zambia School of Medicine, Phillimon Ndubani --- Institute for Social and Economic Research, University of Zambia, Miriam Mumbi --- University of Zambia School of Medicine, Deborah L Jones --- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Stephen M Weiss --- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Olga Villar-Loubet --- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Szonja Vamos --- University of Miami Miller School of Medicine, Drenna Waldrop-Valverde --- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine,Zambia has over 1 million HIV infections nationwide and an urban prevalence rate of 23%. This study compared the impact of male involvement in multiple and single session risk reduction interventions among inconsistent condom users in Zambia and the role... -
AIDS-related knowledge and sexual behaviour among married and previously married persons in rural central Mozambique
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Bruce H Noden --- School of Biological Sciences, Illinois State University, Aurelio Gomes --- Division of Infectious Diseases of the Department of Medicine, University of Pittsburgh, Aldina Ferreira --- Centre for Medical Research, Catholic University of Mozambique,HIV prevalence in central Mozambique is the highest in the country with high urban rates impacting on the rural areas. To identify potential factors influencing the spread of HIV in three sparsely populated districts in southern Sofala province, 847 married... -
Self-reported adherence to HAART in South-Eastern Nigeria is related to patients' use of pill box
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Chinwe V Ukwe --- Department of Clinical Pharmacy and Pharmacy Management, University of Nigeria Nsukka, Obinna I Ekwunife --- Department of Clinical Pharmacy and Pharmacy Management, University of Nigeria Nsukka, Patrick O Udeogaranya --- Department of Clinical Pharmacy and Pharmacy Management, University of Nigeria Nsukka, Ukamaka I Iwuamadi --- Orchad community Pharmacy,The aim of this study was to assess levels of adherence and predictors of adherence to HAART in South-Eastern Nigeria. Selfreported adherence to HAART was assessed at 4-week intervals for a period of 3 months. A 10-item questionnaire was used... -
Maternal HIV status and infant feeding practices among Ugandan women
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Pius Okong --- St Francis Hospital Nsambya, Praxedes Kituuka Namaganda --- Department of Paediatrics, St Francis Hospital Nsambya, Luciana Bassani --- St Francis Hospital Nsambya, Mary Mbidde Tabaro --- St Francis Hospital Nsambya, Francesca Zanetto --- St Joseph's Hospital, Edith Birungi Mwebaze --- Social Sector Planning and Management, Makerere University, Liliana Weimer --- Unit of Pharmacology and Therapy of Viral Diseases of the Department of Therapeutic Research, Istituto Superiore di Sanità (The Italian National Institute of Health), Lina Tomasoni --- Unit for Tropical and Imported Diseases, Spedali Civili General Hospital, Francesco Castelli --- Department for Mother and Child Care and Medical Biotechnologies, University of Brescia, Italy Marina Giuliano --- Unit of Pharmacology and Therapy of Viral Diseases of the Department of Therapeutic Research, Istituto Superiore di Sanità (The Italian National Institute of Health),To describe the infant feeding practices in the general population in Uganda, and to assess the impact of maternal HIV status on these practices, a questionnaire was administered to women attending the follow-up clinics for child vaccination. Among the mothers... -
A qualitative exploration of HIV-positive pregnant women's decision-making regarding abortion in Cape Town, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Phyllis Orner --- Women's Health Research Unit in the School of Public Health and Family Medicine, University of Cape Town, Maria de Bruyn --- Ipas, USA Jane Harries --- Women's Health Research Unit in the School of Public Health and Family Medicine, University of Cape Town, Diane Cooper --- Women's Health Research Unit in the School of Public Health and Family Medicine, University of Cape Town,HIV-positive women's abortion decisions were explored by: (i) investigating influencing factors; (ii) determining knowledge of abortion policy and public health services; and (iii) exploring abortion experiences. In-depth interviews were held with 24 HIV-positive women (15 had an abortion; 9 did... -
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... -
Social capital and the decline in HIV transmission – A case study in three villages in the Kagera region of Tanzania
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Gasto Frumence --- Department of Development Studies, Muhimbili University of Health and Allied Sciences, Tanzania Japhet Killewo --- Department of Biostatistics and Epidemiology, Muhimbili University of Health and Allied Sciences, Tanzania Gideon Kwesigabo --- Department of Biostatistics and Epidemiology, Muhimbili University of Health and Allied Sciences, Tanzania Lennarth Nyström --- Department of Public Health and Clinical Medicine, Epidemiology and Global Health, Umeå University, Sweden Malin Eriksson --- Department of Public Health and Clinical Medicine, Epidemiology and Global Health, Umeå University, Sweden Maria Emmelin --- Department of Public Health and Clinical Medicine, Epidemiology and Global Health, Umeå University, SwedenWe present data from an exploratory case study characterising the social capital in three case villages situated in areas of varying HIV prevalence in the Kagera region of Tanzania. Focus group discussions and key informant interviews revealed a range of... -
Developing teacher self-efficacy via a formal HIV/AIDS intervention
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Paul Webb --- Nelson Mandela Metropolitan University, Anita Gripper --- Nelson Mandela Metropolitan University,This study investigated the effects of a HIV/AIDS module on teachers' sense of self-efficacy regarding their ability to bring about behaviours in their learners which contribute to responsible living and a reduction of the spread of HIV in their communities... -
Perception of risk of HIV and sexual risk behaviours among students in the United States, Turkey and South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Adedeji Adefuye --- HIV/AIDS Research and Policy Institute, Tititlayo C Abiona --- HIV/AIDS Research and Policy Institute, Joseph A Balogun --- College of Health Sciences, Chicago State University, USA Seyi Ladele Amosun --- Division of Physiotherapy at the School of Health & Rehabilitation Sciences, Faculty of Health Sciences, University of Cape Town, South Africa Jose Frantz --- Department of Physiotherapy, University of the Western Cape, South Africa Yavuz Yakut --- Department of Physiotherapy and Rehabilitation of Faculty of Health Sciences, Hacettepe University, TurkeyThe aim of this study was to examine HIV sexual risk behaviours and perception of HIV risk among 1 095 students from the United States of America (US), Turkey and South Africa. Randomly selected students who were enrolled in general... -
HIV protective strategies among college students in Durban, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Pranitha Maharaj --- School of Development Studies, University of KwaZulu-Natal, John Cleland --- London School of Hygiene and Tropical Medicine,There is growing concern about the high level of HIV infection among young people in South Africa. The aim of the study is to examine the HIV protective strategies used by college students with specific emphasis on variations by race... -
Modelling level, trend and geographical variations in stigma and discrimination against people living with HIV/AIDS in Nigeria
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Samson B Adebayo --- Monitoring and Evaluation Division, Society for Family Health, Richard Fakolade [B0002] Jennifer Anyanti --- Society for Family Health, Bright Ekweremadu --- Society for Family Health, Olaronke Ladipo --- Society for Family Health, Augustine Ankomah --- Applied Population Research, University of Exeter, UKPeople living with HIV and AIDS (PLHA) often face stigma and discrimination. Stigma is a powerful tool for social control and PLHA are to varying degrees stigmatised against. Consequences of stigma and discrimination against PLHA may result in low turn-out... -
HIV/AIDS knowledge, behaviour and beliefs among South African university students
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Preshani Reddy --- University of KwaZulu-Natal, Jose Frantz --- University of the Western Cape,Globally, South Africa has the highest prevalence of HIV/AIDS. In the absence of cure, prevention is the only available method to reduce HIV prevalence rates. This can only be obtained through behavioural change, which is associated with a good knowledge... -
The social and clinical characteristics of patients on antiretroviral therapy who are ‘lost to follow-up’ in KwaZulu-Natal, South Africa: a prospective study
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Karl Peltzer --- Human Sciences Research Council, South Africa Shandir Ramlagan --- University of Natal, Mohamed Salim Khan --- Ladysmith Provincial Hospital, South Africa Bernhard Gaede --- University of KwaZulu-Natal,A significant proportion of those initiating antiretroviral treatment (ART) for HIV infection are lost to follow-up. Causes (including HIV symptoms, quality of life, depression, herbal treatment and alcohol use) for discontinuing ART follow-up in predominantly rural resource-limited settings are not... -
Ambiguous diagnosis, futile treatments and temporary recovery: Meanings of medical treatment among HIV/AIDS family caregivers providing care without ARVs
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Mokhantšo Makoae --- Human Sciences Research Council (HSRC),The capacity of countries with high HIV and AIDS prevalence to provide antiretroviral treatment and care for all people who need support remains a public health challenge. In Lesotho, there are improvements in this area but the high proportion of... -
Social grants for people living with HIV and on antiretroviral therapy in KwaZulu-Natal, South Africa: a longitudinal study
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Karl Peltzer [d231e18]The aim of this study was to assess the predictors of the receipt of a disability grant (DG) status and the impact of the DG on health outcomes of HIV patients and on antiretroviral therapy (ART) in a longitudinal study... -
‘We are left in the cold’: Nurses’ perceptions and responses to antiretroviral treatment roll-out in the Free State, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Katinka de Wet [d217e18] Shirley du PlooyThe unprecedented roll-out of antiretroviral therapy (ART) in South Africa is a complex process where no previous endeavour exists that can measure, predict, or direct an intervention of this scale. In the Free State province, unique characteristics and problems distinguish... -
HIV knowledge and health-seeking behavior in Zambézia Province, Mozambique
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Carolyn M. Audet [d209e19] Mohsin Sidat Meridith Blevins Troy D. Moon Alfredo Vergara Sten H. VermundHIV prevalence rates in Zambézia Province were estimated to be 12.6% in 2009. A number of educational campaigns have been aimed at improving HIV transmission and prevention knowledge among community members in an effort to reduce infection rates. These campaigns... -
Accessibility of antiretroviral therapy in Ghana: Convenience of access
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Joyce Addo-Atuah [d138e18] Dick Gourley Greta Gourley Shelley I. White-Means Robin J. Womeodu Richard J. Faris Nii Akwei AddoThe convenience of accessing antiretroviral therapy (ART) is important for initial access to care and subsequent adherence to ART. We conducted a qualitative study of people living with HIV/AIDS (PLWHA) and ART healthcare providers in Ghana in 2005. The objective... -
Adolescent religiosity and attitudes to HIV and AIDS in Ghana
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Kofi Nyame Amoako-Agyeman [d41e19]This study investigated the relationships between adolescent religiosity and attitudes to HIV/AIDS based on two major techniques of analysis, factor and regression analysis towards informing preventive school education strategies. Using cross-sectional data of 448 adolescents in junior high school, the... -
Application of the information, motivation and behavioural skills model for targeting HIV risk behaviour amongst adolescent learners in South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Misheck Ndebele [d94e14] Mambwe Kasese-Hara Michael GreylingThis paper discusses the application of an information, motivation and behavioural skills (IMB) model in a school-based programme for the reduction of HIV risk behaviour among 259 Grade 11 learners in two high schools in Alexandra township, Johannesburg. School 1... -
The association between social networks and self-rated risk of HIV infection among secondary school students in Moshi Municipality, Tanzania
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Elizabeth J. Lyimo --- , Tanzania Jim Todd --- , UK Lisa Ann Richey --- , , Denmark Bernard Njau --- , TanzaniaThis study describes the social networks of secondary school students in Moshi Municipality, and their association with self-rated risk of human immunodeficiency virus (HIV) infection. A cross-sectional analytical study was conducted among 300 students aged 15–24 years in 5 secondary... -
Changes in sexual behaviour and practice and HIV prevalence indicators among young people aged 15–24 years in Zambia: An in-depth analysis of the 2001–2002 and 2007 Zambia Demographic and Health Surveys
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Joshua Kembo --- , South AfricaHIV and AIDS still pose a major public health problem to most countries in sub-Saharan Africa, Zambia included. The objective of the paper is to determine changes in selected sexual behaviour and practice and HIV prevalence indicators between 2001–2002 and... -
The duty to disclose in Kenyan health facilities: a qualitative investigation of HIV disclosure in everyday practice
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Eileen Moyer [d338e14] Emmy Kageha Igonya Rosalijn Both Peter Cherutich Anita HardonDisclosure of HIV status is routinely promoted as a public health measure to prevent transmission and enhance treatment adherence support. While studies show a range of positive and negative outcomes associated with disclosure, it has also been documented that disclosing... -
Perception of risk of HIV infections and sexual behaviour of the sexually active university students in Zimbabwe
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Njabulo Nkomazana --- , , Republic of South Africa Pranitha Maharaj --- , , Republic of South AfricaThe study sought to establish university students' perceptions of risk of HIV infections. A cross-sectional survey was conducted on 345 sexually active students at two universities in Zimbabwe (one state and one private). Results revealed that above a quarter of... -
High-risk behaviors among adult men and women in Botswana: Implications for HIV/AIDS prevention efforts
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Mpho Keetile --- , , BotswanaThe government of Botswana has been spending a lot of money in the prevention, treatment, care and support for HIV/AIDS patient for decades. This paper uses data from the third Botswana AIDS Impact Survey (BAIS III) to explore high-risk behaviors... -
Interplay between economic empowerment and sexual behaviour and practices of migrant workers within the context of HIV and AIDS in the Lesotho textile industry
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Pius Tangwe Tanga --- , , South Africa Magdaline Nji Tangwe --- , , South AfricaEconomic empowerment brings with it a wide range of consequences, both positive and negative. The objective of this paper was to examine the relationship between economic empowerment and the sexual behaviour and practices of migrant workers within the context of... -
Health behaviour change of people living with HIV after a comprehensive community-based HIV stigma reduction intervention in North-West Province in South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: H. Christa Chidrawi --- , , South Africa Minrie Greeff --- , , South Africa Q. Michael Temane --- , , South AfricaAll over the world, health behaviour is considered a complex, far reaching and powerful phenomenon. People's lives are influenced by their own or others' health behaviour on a daily basis. Whether it has to do with smoking, drinking, pollution, global... -
‘Dented’ and ‘Resuscitated’ masculinities: The impact of HIV diagnosis and/or enrolment on antiretroviral treatment on masculine identities in rural eastern Uganda
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Godfrey E. Siu --- , Uganda Daniel Wight --- , United Kingdom Janet Seeley --- , , United KingdomThere is limited research on the impact of HIV or its treatment on men's identity construction and gender roles in sub-Saharan Africa. Based on in-depth research with 26 men in rural Uganda, this article discusses men's vulnerabilities and shifting gender... -
Trends in HIV risk behaviour of incoming first-year students at a South African university: 2007–2012
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Rénette J. Blignaut --- , , South Africa Joachim Jacobs --- , South Africa Tania Vergnani --- , South AfricaThe aim of the research on which this article is based was to understand the behavioural changes of the target student population over time to ensure that future prevention programmes are more effective in changing behaviour. This study reports on... -
A case study of school support and the psychological, emotional and behavioural consequences of HIV and AIDS on adolescents
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Olubusayo Aduke Asikhia --- , , South Africa Kesh Mohangi --- , , South AfricaVarious studies have reported a huge increase in the numbers of orphaned adolescents in Sub-Saharan Africa and its effects on their psychological, emotional and behavioural development. Yet, their needs are seldom recognised or adequately addressed in policy and programmes.This article... -
Difficulties facing healthcare workers in the era of AIDS treatment in Lesotho
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Masebeo Veronica Koto --- , South Africa Pranitha Maharaj --- , South AfricaSub-Saharan Africa is most affected by the AIDS pandemic and Lesotho is no exception. In many countries, healthcare workers are at the forefront of the fight against AIDS. This study explores the difficulties facing healthcare workers in Lesotho using a... -
Qualitative evaluation of selected social factors that impact sexual risk-taking behaviour among African students in Kwazulu-Natal, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Ndumiso Daluxolo Ngidi --- , , South Africa Sibusiso Moyo --- , South Africa Thobile Zulu --- , , South Africa Jamila Khatoon Adam --- , South Africa Suresh Babu Naidu Krishna --- , South AfricaBackground: The incidence of HIV and AIDS continues to be a source of great concern within universities in South Africa. Furthermore, university students constitute an important community in the intervention against the HIV/AIDS epidemic. Students in the age group of... -
Towards an integrated approach to health and medicine in Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Kezia Batisai --- , , South AfricaThis article frames the intersections of medicine and humanities as intrinsic to understanding the practice of health care in Africa. Central to this manuscript, which draws on empirical findings on the interplay between HIV and AIDS and alternative medicine in... -
Addressing adolescents’ risk and protective factors related to risky behaviours: Findings from a school-based peer-education evaluation in the Western Cape
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Furzana Timol --- , South Africa Mohammed Yacoob Vawda --- , South Africa Arvin Bhana --- , South Africa Benita Moolman --- , South Africa Mokhantso Makoae --- , South Africa Sharlene Swartz --- , South AfricaBackground: Peer-education programmes aim to bring about attitudinal and behavioural changes in their target audience. In the South African educational context, peer education is a favoured approach in dealing with issues such as HIV and AIDS, sexual decision-making and substance... -
‘I thought if I marry the prophet I would not die’: The significance of religious affiliation on marriage, HIV testing, and reproductive health practices among young married women in Zimbabwe
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Denise Dion Hallfors --- , USA Bonita J. Iritani --- , USA Lei Zhang --- , USA Shane Hartman --- , USA Winnie K. Luseno --- , USA Elias Mpofu --- , , Australia Simbarashe Rusakaniko --- , , ZimbabweThis study examines the association between religious affiliation and reasons for marriage, perceived church attitudes, and reproductive health-seeking behaviors, including HIV testing, among young women in eastern rural Zimbabwe. The sample comprised women (N = 35) who had married by 2012 while... -
Contemporary HIV/AIDS research: Insights from knowledge management theory
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Chris William Callaghan --- , , South AfricaKnowledge management as a field is concerned with the management of knowledge, including the management of knowledge in research processes. Knowledge management theory has the potential to support research into problems such as HIV, antibiotic resistance and others, particularly in... -
Rethinking HIV-prevention for school-going young people based on current behaviour patterns
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Maretha Visser --- , , South AfricaThe aim of the research was to gain increased knowledge regarding the sexual risk behaviour of school-going young people in South Africa after two decades of HIV-education in schools, to contribute to the development of improved HIV prevention strategies. In... -
Reducing substance use and risky sexual behaviour among drug users in Durban, South Africa: Assessing the impact of community-level risk-reduction interventions
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: C.D.H. Parry --- , South Africa T. Carney --- , South Africa P. Petersen Williams --- , South AfricaAlcohol and other drug (AOD) use is increasingly recognised as having a direct and indirect effect on the transmission of human immunodeficiency virus (HIV). However, there is evidence to suggest that drug- and sex-related HIV risk-reduction interventions targeted at drug... -
Modelling self-assessed vulnerability to HIV and its associated factors in a HIV-burdened country
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: A. F. Fagbamigbe --- , , South Africa A. M. Lawal --- , , South Africa E. S. Idemudia --- , , South AfricaBackground: Globally, individuals’ self-assessment of vulnerability to HIV infection is important to maintain safer sexual behaviour and reduce risky behaviours. However, determinants of self-perceived risk of HIV infection are not well documented and differ. We assessed the level of self-perceived... -
Covariates of high-risk sexual behaviour of men aged 50 years and above in sub-Saharan Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Clifford O Odimegwu --- , , South Africa Nyasha Mutanda --- , , South AfricaSince the advent of HIV/AIDS, sexuality studies in sub-Saharan Africa (SSA) have focused mainly on the sexual behaviour of the younger generation (15–49 years) and little has been done to understand the sexual behaviour of those a 50 years and... -
Perceived influence of value systems on the uptake of voluntary medical male circumcision among men in Kweneng East, Botswana
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Thandisizwe R. Mavundla --- Department of Health Studies, College of Human Sciences, University of South Africa, South Africa Fungai Mbengo --- School of Nursing and Midwifery, Edith Cowan University, Australia Khanyenda Bruce Ngomi --- Department of Health Studies, College of Human Sciences, University of South Africa, South AfricaBotswana is one of the countries in Eastern and Southern Africa significantly impacted by the Human Immunodeficiency Virus (HIV). To control the spread of HIV, the government in 2009 rolled out the voluntary medical male circumcision (VMMC) programme as an... -
Diel activity patterns in a captive colony of rinkhals, Hemachatus haemachatus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: GrahamJ. Alexander --- University of the Witwatersrand, South Africa CatherineL. Marshall --- University of the Witwatersrand, South Africa -
How to make measurements in thermoregulatory studies: the heating debate continues
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Shelley Currin --- University of the Witwatersrand, South Africa Graham John Alexander --- University of the Witwatersrand, South Africa -
Temperature regulation in free-ranging ectotherms: what are the appropriate questions?
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: PaulE. Hertz --- Barnard College, Columbia University, USA RaymondB. Huey --- University of Washington, USA RobertD. Stevenson --- University of Massachusetts Boston, USA -
A respone to Hertz, Huey and Stevenson
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Graham John Alexander --- University of the Witwatersrand, South Africa Shelley Currin --- University of the Witwatersrand, South Africa -
Mitochondrial DNA divergence in southern African bufonids: are species equivalent entities?
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Michael Cunningham --- Stellenbosch University, South Africa MichaelI. Cherry --- Stellenbosch University, South AfricaAfrican bufonids differ greatly in the extent of DNA diversity within species, and divergence among species. Here we address two aspects of DNA sequence variation. First, we explore levels of diversity at several mitochondrial and nuclear genes, and their potential... -
Evidence for an Afrotemperate amphibian fauna
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: JohnC. Poynton --- , UKLatitudinal and altitudinal changes in composition of the African amphibian fauna is analysed to test the standard zoogeographical division of the continent into Palaearctic and Afrotropical Regions. A comparably high faunal change north and south of the. tropical savannas suggests... -
Towards a natural classification of African toads (Anura, Bufonidae): Past progress and future prospects
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: BarryT. Clarke --- The Natural History Museum, EnglandAfrican bufonid toads (especially members of the genus Bufo) are a relatively uniform group morphologically, but beneath this apparent uniformity lies a higher level of diversity in habits and lifestyle than is initially evident. Members of the group exhibit considerable... -
Effects of diet on the systematic utility of the tortoise carapace
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Justin Gerlach --- University Museum of Zoology Cambridge, U.K.The main character used in identifying species of Chelonia is the carapace. The taxonomy of several terrestrial tortoise genera remains highly disputed, due in part to a limited knowledge of the limits of variation in many populations. For taxa where... -
A new cryptic frog of the genus Boophis from the northwestern rainforests of Madagascar
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Miguel Vences --- University of Amsterdam, The Netherlands Frank Glaw --- Zoologische Staatssammlung, GermanyWe describe a new species of arboreal frog of the Boophis mandraka group (Anura: Mantellidae) from Manongarivo Special Reserve in north‐western Madagascar. This new species is morphologically similar to the other species of this group: B. liami, B. mandraka, and... -
Phylogenetic relationships among the Stiletto Snakes (genus Atractaspis) based on external morphology
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Katie Moyer --- Whitman College, USA Kate Jackson --- Whitman College, USAStiletto Snakes (genus Atractaspis) are the most poorly studied of the three clades of snakes with front-fanged venom-delivery systems. Fossorial and endemic to Africa and the Middle East, Atractaspis possess uniquely derived mobile fangs that allow them to perform a... -
Afrotemperate Amphibians in southern and eastern Africa: a critical review
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: JohnC. Poynton --- Natural History Museum, UKThe term ‘Afrotemperate’ is taken to cover the area and fauna of the southern Cape, eastern highlands of South Africa, and intertropical highlands. A feature of Afrotemperate distribution is that it conforms to climatic zones rather than to latitudinal zonation... -
A new insight to the Hamiltonian systems with a finite number of spectral parameters
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ekin Uğurlu --- Çankaya University, TurkeyIn this article, we introduce a new first-order differential equation containing a finite number of spectral parameters and some results on the solutions of this equation. In particular, with the aid of the nested-circles approach we share a lower bound... -
Temporal changes in allelic variation among Cape Dwarf Chameleons, Bradypodion pumilum, inhabiting a transformed, semi-urban wetland
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Eric M. Katz --- , , South Africa Krystal A. Tolley --- , , South Africa Jacqueline M. Bishop --- , , South AfricaThe Cape Dwarf Chameleon, Bradypodion pumilum, is threatened by extensive habitat loss and transformation in the Western Cape Province of South Africa. As a result, the species exists as a collection of populations inhabiting an increasingly fragmented landscape within a... -
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... -
Mapping the strength of sectoral innovation system in the Nigerian pharmaceutical industry: Empirical evidence
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Rachael Aderonke Ayo-Lawal --- Obafemi Awolowo University, Nigeria Caleb Muyiwa Adelowo --- Obafemi Awolowo University, Nigeria Ayobami Adesina Oyewale --- Obafemi Awolowo University, Nigeria Emmanuel Emeka Ejim-Eze --- Obafemi Awolowo University, Nigeria Elizabeth Adeteju Omimakinde --- Obafemi Awolowo University, Nigeria Wilson Oyekigho Erhun --- Obafemi Awolowo University, Nigeria Okechukwu Ukwuoma --- Obafemi Awolowo University, NigeriaIt is well known that innovation in the modern economy is driven by interactions among the stakeholders that make up the innovation system. Effective interactions among key actors in an innovation system foster flow of knowledge and resources development and... -
Sustainability of energy transition on output growth and carbon emission abatement in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ikechukwu Sebastine Asogwa --- Michael Okpara University of Agriculture, Nigeria Charles Nnamdi Anumudu --- Michael Okpara University of Agriculture, NigeriaThis study examined the effects of renewable energy use on the output growth convergence, as well as the impacts of renewable energy use for an alternative to carbon emission (CO2) abatement in sub-Saharan Africa (SSA). The dual purpose followed the... -
Restoration of South African estuaries: successes, failures and the way forward
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Claassens --- Rhodes University, South Africa JB Adams --- Institute for Coastal & Marine Research, Nelson Mandela University, South Africa NM de Villiers --- Rhodes University, South Africa J Wasserman --- Institute for Coastal & Marine Research, Nelson Mandela University, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaMajor threats to South African estuaries include freshwater flow alterations, urbanisation, habitat transformation, deteriorating water quality, increased biological invasions and resource over-exploitation. Although South African estuary restoration is in its infancy, important lessons have been learnt through past efforts undertaken... -
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... -
Genetic diversity of the mantellid frog Blommersia blommersae, and description of a new anuran species from south-eastern Madagascar
Item type: Journal Article • Journal: Treading a Delicate Tightrope: A principal balancing between education and political change during turbulent times • Authors: Miguel Vences --- , Germany Moritz Armerding --- , Germany Jörn Köhler --- , Germany Frank Glaw --- , GermanyA range-wide assessment of genetic variation in one mitochondrial (16S rRNA) and one nuclear-encoded (Rag-1) gene fragment of the widespread Madagascar frog Blommersia blommersae revealed the presence of up to 12 deep genetic lineages. Many of these differed by genetic... -
Some properties of the Walsh-Nörlund means
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ushangi Goginava --- United Arab Emirates University, UAE Károly Nagy --- Institute of Mathematics and Computer Sciences, University of Nyíregyháza, Nyíregyháza, HungaryIn the present paper we give a necessary and sufficient condition on monotone weights, which guaranties the Nörlund means of Walsh-Fourier series converge in L 1 norm and CW norm. We also discuss the almost everywhere summability by Nörlund means... -
Validation of Learning Transfer Inventory System (LTIS) in Cameroon teachers: Measurement invariance and latent mean difference across sex
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bekolo Ngo’a Celestin --- Yibin University, China Tchouchu Emmanuel --- University of Cape Coast, Ghana Kouame Dangui Dorcas --- School of Management and Economics (SME) University of Electronic Science and Technology-Chengdu, ChinaThis study investigated the psychometric properties of the Learning Transfer Inventory System (LTIS) in the Cameroonian education system. A sample of 700 in-service teachers (female = 54.8%; mean age = 36 years, SD = 15.41 years) who completed leadership, management,... -
Componentwise localization of solutions to systems of operator inclusions via Harnack type inequalities
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Radu Precup --- Institute of Advanced Studies in Science and Technology, Babeş -Bolyai University & Tiberiu Popoviciu Institute of Numerical Analysis, Romania Jorge Rodríguez-López --- CITMAga, Universidade de Santiago de Compostela, SpainWe establish compression-expansion type fixed point theorems for systems of operator inclusions with decomposable multivalued maps. The approach is vectorial allowing to localize individually the components of solutions and to obtain multiple solutions with multiplicity not necessarily concerned with all... -
Spatio-temporal variation in phytoplankton community structure in backwaters of the Ketar River, central Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Yadesa Chibsa --- Wachemo University, Ethiopia Seyoum Mengistou --- Addis Ababa University, Ethiopia Demeke Kifle --- Addis Ababa University, EthiopiaThis study assessed the spatio-temporal dynamics of the phytoplankton community in backwaters of the Ketar River, central Ethiopia, in relation to water quality and macrophyte coverage. Phytoplankton samples and physicochemical information were collected at six sites along the river over... -
Long-term study of the drought impact on the phytoplankton concentration and assemblages in two water supply reservoirs in Namibia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Johannes Sirunda --- Namibia Water Corporation, Namibia Paul Oberholster --- University of the Free State, South Africa Gideon Wolfaardt --- Stellenbosch University, South Africa Christoff Truter --- Toronto Metropolitan University, Canada Sean van der Merwe --- University of the Free State, South AfricaRising temperatures and increased occurrences of droughts, brought on by climate change, are expected to affect reservoir water levels. We hypothesised that the decrease in reservoir volumes in dams with desert climates will favour the growth of phytoplankton biomass, measured... -
Do farmer-actor interactions in the agricultural innovation system drive technological innovation adoption in Ghana?
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Justina Adwoa Onumah --- CSIR-Science and Technology Policy Research Institute, Ghana Felix Ankomah Asante --- University of Ghana, Ghana Robert Darko Osei --- University of Ghana, Ghana Peter Asare-Nuamah --- University of Environment and Sustainable Development, GhanaThe low level of technological innovation adoption among farmers has been a development concern. However, not much attention has been paid to how agricultural innovation system actors contribute to the adoption of technological innovations among farmers. This paper, therefore, analyzed... -
Dietary niche breadth and overlap of four sympatric southern African myrmecophagous mammal species, as inferred from the literature
Item type: Journal Article • Journal: African Zoology • Authors: Darren W Pietersen --- University of Pretoria, South Africa Mark P Robertson --- University of Pretoria, South AfricaFive myrmecophagous mammal species occur sympatrically over large parts of southern Africa. Of these, the diets of four species have been studied in sufficient detail to facilitate interspecific comparisons. The diets of the aardvark Orycteropus afer, aardwolf Proteles cristatus, bat-eared... -
Strengths-based human resource system and organisational citizenship behaviour: Mediation by organisational support and moderation by tenure
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: He Ding --- North China Electric Power University, China Meng Zhang --- North China Electric Power University, China Enhai Yu --- North China Electric Power University, ChinaThis study explored perceived organisational support (POS) mediation and the role of organisational tenure moderation in the relationship between the perceived strengths-based human resource (HR) system and organisational citizenship behaviour (OCB). We collected data from 216 Chinese employees in different... -
Context-based factors that influence healthcare information system implementation in resource-constrained public hospitals
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mourine Achieng --- University of South Africa, South Africa Ephias Ruhode --- University of the West of Scotland, ScotlandTechnology-based interventions in healthcare are often anticipated to improve the quality of healthcare services. These expectations are based on a perceived belief in the ability of technology to alleviate some of the challenges associated with manual, paper-based healthcare service delivery... -
Effect of temperature on embryonic development and offspring performance of the African river prawn, Macrobrachium vollenhovenii
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Judith G Makombu --- University of Buea, Cameroon Cynthia A Bih --- University of Buea, Cameroon Geneva O Nkongho --- Institute of Agricultural Research for Development (IRAD), Cameroon Pius M Oben --- University of Buea, Cameroon Rollins N Ndi --- University of Buea, Cameroon Clovis N Chombe --- University of Buea, Cameroon Mercy B Verkijika --- University of Buea, Cameroon Gerry K Sonkeng --- Aquaculture Tropicale (Aqua-Tropic), Cameroon Tekou Guegang --- University of Dschang, Cameroon Janet H Brown --- Institute of Aquaculture, University of Stirling, United KingdomMacrobrachium vollenhovenii (Herklots, 1857), the largest of the indigenous West African Palaemonidae prawns, has a high potential for aquaculture. This work was carried out to assess the effect of temperature on embryonic development and offspring quality of this species. In... -
The diversity of epigeal insects after the application of the brush packing restoration method following bush-encroachment control in South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: A Marquart --- North-West University, South Africa OB Sikwane --- North-West University, South Africa K Kellner --- North-West University, South AfricaEvidently, bush encroachment caused by factors, such as overgrazing, results in a change in savanna ecosystems. This shift in vegetation structure can affect many factors, including insect fauna. Epigeal arthropods occupy smaller habitat patches and therefore respond to the effects... -
Seedling establishment and early growth in Calobota sericea subjected to moisture stress
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois Müller --- , South Africa Letty Masemola --- , South Africa Stephen Modiba --- , South Africa Nothando Ngcobo --- , South AfricaThe South African perennial legume Calobota sericea (Thunb.) Boatwr. & B-E van Wyk has been shown to be drought tolerant as mature plants, but information on drought tolerance of seedlings is lacking. This study evaluated the impact of moisture stress... -
Rod temperature regulation using current and time-delayed feedback
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: V.M. Abdullayev --- Institute of Control Systems of ANAS, Azerbaijan K.R. Aida-Zade --- Institute of Control Systems of ANAS, AzerbaijanThe synthesis problem of control of objects with distributed parameters with feedback is investigated on the example of the process of heating a rod in a furnace. To generate the values of control actions, we propose to use their linear... -
Multiplicity of positive solution for Schrödinger-Poisson system with p-Laplacian
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Weiqiang Zhang --- Lanzhou University, People’s Republic of China Peihao Zhao --- Lanzhou University, People’s Republic of ChinaIn this paper, we consider the positive solutions for a Schrödinger-Poisson system containing p-Laplacian and Poisson equation. With a local condition on the potential, by using penalization method, Nehari manifold and Ljusternik-Schnirelmann category theory, the multiplicity and concentration of solutions... -
Temporary academics in South African higher education institutions: Their lived precarity experiences
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Shihaam Solomon --- University of the Western Cape, South Africa Marieta du Plessis --- University of the Western Cape, South AfricaTemporary academic appointments are increasingly prevalent in higher education institutions across the globe. The lived experiences of temporary academic staff within South African higher education institutions were explored. Twenty-six temporary academic staff (females = 69%, black = 75%, white =... -
Spatiotemporal expectations of apparent motion and the effect of attentional control
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Junjie Qiu --- Lingnan Normal University, China Jibo Li --- Lingnan Normal University, ChinaAn experimental investigation was conducted on whether and how temporal expectation influences visual processing in moving objects, while also considering the role of attention control. Data on reaction times were collected as outcome measures from two behavioural experiments. In experiment... -
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... -
Mapping fine-scale demersal trawl effort for application in ecosystem assessment and spatial planning
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JC Currie --- South African National Biodiversity Institute (SANBI), South Africa LR Harris --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa LJ Atkinson --- South African Environmental Observation Network (SAEON), South Africa TP Fairweather --- Fisheries and the Environment (DFFE), South Africa KJ Sink --- South African National Biodiversity Institute (SANBI), South AfricaFine-scale maps of fishing activity are valuable information layers for fisheries management, assessments of biodiversity impacts and marine spatial planning. Our aim was to develop an accurate map of demersal trawling intensity in South Africa and to demonstrate its utility... -
Patterns in sightings of ocean sunfishes (Molidae) in the greater Dyer Island ecosystem, Western Cape, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RGA Watson --- , South Africa E Frey --- Queen’s University, Canada S Hörbst --- , South AfricaThis study aims to describe the distribution of ocean sunfishes (family Molidae) in the greater Dyer Island ecosystem off the southwest coast of South Africa. Between 2014 and 2022, local whale watching vessels operating under Dyer Island Cruises conducted 3... -
A new species of African legless skink, genus Acontias Cuvier, 1816 “1817” (Squamata: Scincidae) from Serra da Neve inselberg, south-western Angola
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mariana P. Marques --- Carnegie Museum of Natural History, USA Diogo Parrinha --- Universidade do Porto, Portugal Arthur Tiutenko --- Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany Manuel Lopes-Lima --- Universidade do Porto, Portugal Aaron M. Bauer --- Villanova University, USA Luis M. P. Ceríaco --- Universidade do Porto, PortugalDuring a recent survey of the Serra da Neve inselberg in south-western Angola, a population of legless skinks of the genus Acontias was found. Only three species of this genus have been recorded for the country so far – A... -
Frog and reptile conservation through the lens of South Africa’s nature-based cultural practices
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Fortunate M Phaka --- North-West University, South Africa Jean Hugé --- Hasselt University, Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Belgium Maarten PM Vanhove --- Hasselt University, Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Belgium Louis H du Preez --- North-West University, South AfricaEthnoherpetology improves our understanding of the conservation implications of nature-based cultural practices through investigations of the influence of traditional culture on frog and reptile species (herptiles). Improved understanding of the implications of human activities on these taxa is especially important... -
Monotone ODEs with discontinuous vector fields in sequence spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Oleg Zubelevich --- Steklov Mathematical Institute of Russian Academy of Sciences, RussiaWe consider a system of ODE in a Fréchet space with unconditional Schauder basis. The right side of the ODE is a discontinuous function. Under certain monotonicity conditions we prove an existence theorem for the corresponding initial value problem. We... -
Personalisation of Moodle Learning Management System for Effective Teaching and Learning in Higher Learning Institutions: A Case of the State University of Zanzibar
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Abdalla Shaame --- The State University of Zanzibar, SUZA, Tanzania Umayra El Nabahany --- The State University of Zanzibar, SUZA, Tanzania Said Yunus --- The State University of Zanzibar, SUZA, Tanzania Tabu Kondo --- The University of Dodoma, UDOM, Tanzania Wadrine Maro --- University of Dar es Salaam, UDSM, TanzaniaThe Learning Management System (LMS) continues to persuade instructors and students that the use of the Moodle platform is the correct choice to meet their educational needs. This study presents the personalization of the Moodle LMS based on students’ needs... -
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... -
Teachers’ views and experiences of student mental health and well-being programmes: A systematic review
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: John Goodwin --- University College Cork, Ireland Laura Behan --- , Ireland Niamh O’Brien --- South East Technological University, IrelandBackground: In schools, teachers are often tasked with implementing mental health and well-being programmes. However, little is known about teachers’ views on and experiences with implementing these programmes. -
Family violence during COVID-19 and its impact on mental health of children: A systematic review
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Eslavath Rajkumar --- Indian Institute of Technology Bhilai, India Jayashree Mitra --- Central University of Karnataka, India Reethika Yadav --- Central University of Karnataka, India P. V. Hareesh --- Central University of Karnataka, India Alakananda Gangadharan --- Central University of Karnataka, India M. C. Gopika --- Central University of Karnataka, India Anamika Ben Christa --- Central University of Karnataka, India Allen Joshua George --- Indian Institute of Management, India Aswathy Gopi --- Central University of Karnataka, India Romate John --- Central University of Karnataka, India S. Arya --- Amity Institute of English Studies & Research, India John Abraham --- St. Johns National Academy of Health Sciences, India L. Rajashekaran --- Central University of Karnataka, IndiaPurpose: The COVID-19 pandemic posed unanticipated challenges that could impact how the family system operates across the world. Restrictions imposed to control the rapid spread of the virus substantially increased violence in families. The current study aims to review violence... -
Health locus of control, personality and social support in treatment adherence among diabetic patients
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: --- University of Nigeria, Nigeria --- University of Nigeria, Nigeria --- University of Nigeria, Nigeria --- University of Nigeria, Nigeria --- University of Nigeria, Nigeria --- University of Nigeria, NigeriaWe examined the contributions of health locus of control (internal, external), personality traits, and social support in treatment adherence among Nigerian diabetic patients (N = 126; females = 49.21%, Type 1 diabetes = 58.73%, Type 2 diabetes = 41.27%; age... -
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... -
Marine macroalgae of the Agulhas Marine Province of South Africa: biodiversity, exploitation and potential for aquaculture
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JJ Bolton --- University of Cape Town, South Africa CD McQuaid --- Rhodes University, South AfricaThe Agulhas Marine Province (AMP) extends along most of the south coast of South Africa, from Cape Agulhas to the vicinity of the Mbashe River mouth in the Eastern Cape Province, and has its own distinctive warm-temperate seaweed flora, with... -
Geographical and seasonal patterns in the diet of Cape fur seals Arctocephalus pusillus pusillus in Namibia, based on extensive scat analyses
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DN Mwaala --- University of Namibia, Namibia MR Wilhelm --- University of Namibia, Namibia SP Kirkman --- Fisheries and the Environment (DFFE): Branch Oceans and Coasts, South Africa J-P Roux --- Ministry of Fisheries and Marine Resources, NamibiaNamibia's population of Cape fur seals Arctocephalus pusillus pusillus is a major constituent of top predator biomass in the northern Benguela upwelling system. Understanding their diet is key to comprehending their role in the ecosystem and potential drivers of recent... -
The role of the social sciences and humanities in pandemic preparedness responses: insights gained from COVID-19, HIV and AIDS and related epidemics
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Kaymarlin Govender --- University of KwaZulu-Natal, South Africa Judith King --- , South Africa Patrick Nyamaruze --- University of KwaZulu-Natal, South Africa Tim Quinlan --- University of KwaZulu-Natal, South AfricaThe COVID-19 pandemic, particularly from 2020 to mid-2022, debilitated the management of the HIV epidemic in Africa. The multiple effects included well-documented HIV service interruptions, curtailment of HIV prevention programmes, the associated marked increase in both the risk for HIV... -
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... -
Water quality monitoring and measuring physicochemical parameters using wireless sensor networks
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Satyanarayana Murthy --- , India SF Ahamed --- , IndiaIn a world grappling with the dire consequences of poor sanitation and inadequate water conditions, there is an urgent need for a comprehensive solution. The staggering statistics of over 400 million affected cases and 15–25 million lives lost worldwide underscore... -
Innovation systems, value chains and industrial clusters in developing economies: Case of Jalandhar’s sports goods industry
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Swati Mehta --- Guru Nanak Dev University, IndiaThe paper explores the relationship between innovation systems (IS) and participation in value chains (VCs) to understand the challenges concerning upgrading of an industrial cluster in a developing country. It is argued that the inter-linkages of various actors, organizations and... -
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,... -
Herbage intake and performance of grazing lambs in tropical erect grass pastures maintained at different heights
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lívia Raymundo Irigoyen --- Federal University of Rio Grande do Sul, Brazil Cesar Henrique Espírito Candal Poli --- Federal University of Rio Grande do Sul, Brazil Gladis Ferreira Corrêa --- Federal University of Pampa, Brazil Jalise Fabíola Tontini --- Federal University of Rio Grande do Sul, Brazil Ignacio Fernando López --- Massey University, New Zealand Joseane Anjos da Silva --- Federal University of Rio Grande do Sul, BrazilOne of the main constraints for sheep production in tropical and subtropical areas is the lack of knowledge of how to manage erect tropical grasses for lambs. The objective of this study was to assess the effect of pasture height... -
Stability of Riemann solutions to a class of non-strictly hyperbolic systems of conservation laws
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Shiwei Li --- Henan University of Engineering, P.R. ChinaThis paper is concerned with Riemann problem for a class of non-strictly hyperbolic systems of conservation laws. The two kinds of Riemann solutions including vacuum and delta shock wave are constructed. Under the generalized Rankine-Hugoniot relation and entropy condition, we... -
Quasilattices and complex concept analysis
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: G.N. Nop --- Iowa State University, USA J.D.H. Smith --- Iowa State University, USAQuasilattices are algebraic structures that comprise a semilattice-ordered system of lattices. In this paper, certain quasilattices (that are characterized abstractly by a local completeness property) provide an extension of Wille's concept analysis to the study of complex systems that function... -
E-government’s role in enhancing foreign direct investment to sub-Saharan African countries: An application of system GMM
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Getahun Tolossa Adugna --- School of Economics, College of Business and Economics, University of Gondar, Ethiopia Wondemhunegn Ezezew Melesse --- School of Economics, College of Business and Economics, University of Gondar, Ethiopia Yinges Alemu Muche --- School of Economics, College of Business and Economics, University of Gondar, EthiopiaIn recent years, the provision of government services through electronic platforms has significantly increased due to the rapid development of digital technologies. The significant shift in digital governance is expected to have an effect on key macroeconomic variables through its... -
Building sustainable agri-food market systems: Interconnectedness of social, economic and environmental factors in biofortified cassava food systems
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ogbonnaya Ukeh Oteh --- Michael Okpara University of Agriculture Umudike, Nigeria Jude Mbanasor --- Michael Okpara University of Agriculture Umudike, Nigeria Nnanna Mba Agwu --- Michael Okpara University of Agriculture Umudike, Nigeria Ambrose Ogbonna Oloveze --- Michael Okpara University of Agriculture Umudike, NigeriaSustainability and the future of food systems have become major food policy discourses in recent years. While prior research has focused on analyzing social, economic, and environmental aspects of sustainability separately, the present study takes a broader approach to understand... -
On binary matrix properties
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Michael Hoefnagel --- Stellenbosch University, South Africa Pierre-Alain Jacqmin --- Université catholique de Louvain, Belgium Zurab Janelidze --- Stellenbosch University, South Africa Emil van der Walt --- Stellenbosch University, South AfricaThe so-called matrix properties of finitely complete categories are a special type of exactness properties that can be encoded as extended matrices of integers. The relation of entailment of matrix properties gives an interesting preorder on the set of such... -
A system of two elliptic equations with nonlinear convection and coupled reaction terms
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Dragos-Patru Covei --- The Bucharest University of Economic Studies, RomaniaThe present paper is concerned with the existence of solutions for a class of elliptic systems involving nonlinearities of the Keller-Osserman type and combined with the convection terms. Firstly, we establish a result involving sub and super-solution for a class... -
Stability analysis of fully dynamic piezoelectric beams with internal fractional delay
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jianghao Hao --- Shanxi University, P.R. China Jing Yang --- Shanxi University, P.R. ChinaIn this paper, we are interested in the stability analysis of one-dimensional fully dynamic piezoelectric beam systems with internal fractional delay under different feedback controls (boundary and internal). By introducing two new equations to deal with fractional delay, equivalent new... -
Periodic solution for perturbed Hamiltonian systems
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Khaled Khachnaoui --- University of Kairouan, TunisiaIn this paper, we study the existence of infinitely many periodic solutions for second-order perturbed Hamiltonian systems. By using variational methods, we obtain new criteria to guarantee the existence of infinitely many periodic solutions using Bolle’s perturbation method. Our results... -
On the characteristic functions and Dirchlet-integrable solutions of singular left-definite Hamiltonian systems
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Elgiz Bairamov --- Ankara University, Turkey Kenan Tas --- Usak University, Turkey Ekin Uğurlu --- Çankaya University, TurkeyIn this work, a singular left-definite Hamiltonian system is considered and the characteristic-matrix theory for this Hamiltonian system is constructed. Using the results of this theory we introduce a lower bound for the number of Dirichlet-integrable solutions. Moreover we share... -
Effects of land-use change on the provisioning ecosystem service of wetlands: the case of a social-ecological systems perspective of Boyo Wetland in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Tuji --- Stellenbosch University, South Africa S.M. Jacobs --- Stellenbosch University, South Africa R.R. Malgas --- Stellenbosch University, South Africa K Dzama --- Stellenbosch University, South Africa T Alamirew --- Addis Ababa University, EthiopiaWetlands are catchment life support systems with diverse ecological and socio-economic functions. They have played a significant role in the growth of African human civilisations and cultural development, and today contribute billions of US dollars’ worth of ecosystem services to... -
Lucerne establishment in dryland conditions: effects of crop residues and wheat as a nurse crop
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Stephan le Roux --- Stellenbosch University, South Africa Pieter A Swanepoel --- Stellenbosch University, South AfricaEstablishing lucerne (Medicago sativa) in dryland conditions poses challenges due to unpredictable rainy seasons and seedling vulnerability. A potential solution is adopting a nurse crop during the first year in the same field. This study aimed to assess the impact... -
How do entrepreneurs succeed in challenging economic environments in Africa? Case study evidence from Ghana
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Christopher J. Rees --- University of Manchester, UK Irene Okhade --- University of Manchester, UK Kate E. Rowlands --- University of Manchester, UKThe main aim of the study is to explore aspects of entrepreneurs’ motivation and perceptions with reference to prevailing values in a given context in Africa. In the initial sections of the paper, we draw on concepts of entrepreneurship and... -
A systematic literature review and mapping of systemic barriers to digital learning innovation in Africa in the context of changing global value chains
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Martin Mbaya* --- University of Pretoria, South Africa John Ouma-Mugabe --- University of Pretoria, South AfricaIn the context of COVID-19, universities, national innovation systems (NIS) and global value chains (GVCs), this paper explores systemic barriers (trends and factors) that influence digital learning innovation (DLI) in Africa. The study used the PRISMA framework and Scopus data... -
Optimal system and conservation laws for the generalized Fisher equation in cylindrical coordinates
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A.H. Kara --- University of the Witwatersrand, South Africa Sonia Naseer --- Government College University, Pakistan Ali Raza --- Lahore School of Economics, Pakistan F.D. Zaman --- Government College University, PakistanThe reaction diffusion equation arises in physical situations in problems from population growth, genetics and physical sciences. In many practical situations, the physical domain of the problem is adequately described in cylindrical Coordinates. Therefore, we consider the Fisher equation in... -
A study on approximate controllability of linear impulsive equations in Hilbert spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Nazim I. Mahmudov --- Eastern Mediterranean University, TurkeyIn this paper, we study an approximate controllability for the impulsive linear evolution equations in Hilbert spaces. We give a representation of solution in terms of semigroup and impulsive operators. We present the necessary and sufficient conditions for approximate controllability... -
Strategy research in an African context: A systematic literature review
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Gemechis Terfa Eticha --- Addis Ababa University College of Business and Economics, Ethiopia Olof Brunninge --- Jönköping International Business School, Sweden Workneh Kassa Tessema --- Addis Ababa University College of Business and Economics, EthiopiaThis article presents a systematic review of strategy research in Africa. The quantity of management research in general and strategy research in particular is growing on the continent, though from a low level. It is, however, characterized by a strong... -
Some measure-theoretic aspects of fractal functions: invariant measures and function spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Megha Pandey --- , India Tanmoy Som --- , India Saurabh Verma --- , IndiaBarnsley (1986) introduced the concept of fractal interpolation functions (FIFs). Thereafter, numerous theories have been developed concerning FIFs and their properties. In this article, we explore some measure theoretic aspects of FIFs generated by the method given by Barnsley. We... -
Variations in the heart rate of Mediterranean mussels Mytilus galloprovincialis and brown mussels Perna perna under thermal stress on rocky shores of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Beine --- University of Johannesburg, South Africa LJ Connell --- University of Johannesburg, South Africa R Greenfield --- University of Johannesburg, South AfricaIntertidal mussels experience prolonged emersion during low tide, followed by rapid submergence cooling during high tide, causing temperature-induced stress responses. This study examined variations in heart rate to investigate the relationship between emerged and submerged thermal stress in Mediterranean mussels... -
Genetic consequences in the southern African endemic seabream Polysteganus undulosus (Sparidae) after eight decades of overfishing
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CJ Oosthuizen --- University of Pretoria, South Africa BQ Mann --- Oceanographic Research Institute (ORI), South Africa P Bloomer --- University of Pretoria, South Africa TB Hoareau --- University of Pretoria, South AfricaThe Critically Endangered seventy-four seabream Polysteganus undulosus, a slow-growing sparid that forms spawning aggregations off South Africa, faced heavy exploitation from 1910 until a fishery moratorium was put in place in 1998. Utilising temporal samples from 1962/1963 (mid-collapse) and 2005/2006... -
Orientation, thermal characteristics and structural dimensions of Mangrove Kingfisher Halcyon senegaloides nest cavities in arboreal termitaria in central Mozambique
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Darren W Pietersen --- University of Pretoria, South Africa Gregory BP Davies --- , United States of America Craig T Symes --- University of the Witwatersrand, South AfricaThe breeding ecology of the Mangrove Kingfisher Halcyon senegaloides (family Alcedinidae) remains poorly known. While the few nests recorded in southern and East Africa have been in tree hollows, a seasonal population in central Mozambique woodland breeds in cavities in... -
Understanding Ethiopia’s maize innovation system: Application of integrated innovation system and sustainability transition perspectives
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel Nigussie --- Addis Ababa University, Ethiopia Getnet Alemu --- Addis Ababa University, Ethiopia Million Gebreyes --- International Livestock Research Institute, Sustainable Livestock System (Social Scientist), EthiopiaAgricultural innovation is a top priority on the global sustainable development agenda to solve food insecurity, land degradation, climate-change issues, poverty, and unemployment. This paper aims to identify systemic problems and socio-technical transition factors that hinder the development, dissemination, and... -
‘The Happy Valley’: Temporalized Spatiality in Michael Radford’s White Mischief (1987)
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Boneace Chagara --- Institute for Asian and African Studies, GermanyContemporary times mark a fundamental shift in our sense and experience of the world. The postmodern condition — as remarked by Fredric Jameson (1991) and Jean-Francois Lyotard (1979), among others — calls for new conceptions of lived reality. Nevertheless, profound... -
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... -
A systematic literature review and plans for further study on smart mobile learning system acceptance
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Aminu Hamza --- Universiti Sains Malaysia, Malaysia Yulita Hanum P. Iskandar --- Universiti Sains Malaysia, MalaysiaThis paper’s aim is to conduct a systematic review of the state of scholarly research on smart mobile learning acceptance (SMLS) and suggest areas for future research. Fifty-five papers from 2019 to 2022 were used for the systematic literature review... -
Socio-ecological change in bait fisheries for the common sandprawn Kraussillichirus kraussi in Durban Harbour, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Chetty --- Oceanographic Research Institute (ORI), South Africa E Steyn --- Oceanographic Research Institute (ORI), South Africa JC Groeneveld --- Oceanographic Research Institute (ORI), South AfricaBait fishing for the common sandprawn Kraussillichirus kraussi in Durban Harbour, on the east coast of South Africa, has a history going back to the early 20th century and has been influenced by port development and political changes over time... -
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... -
China–Africa relationships: A systematic literature review and future directions
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Max C. Dike --- Leicester Castle Business School De Montfort University, UK Richard A. Owusu --- Linnaeus University School of Business, SwedenThe deepening engagements of China in Africa in the past three decades have recently led to an increase in academic interest in exploring China–Africa relationships. This paper presents a systematic review of the extant literature on China–Africa ties published during... -
The legacy of the Maxim machine gun in postcolonial Africa: Implications for governance and management scholarship
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Moses N. Kiggundu --- , CanadaThe essay draws on aspects of British colonial history to throw light on Africa’s postcolonial state and society. Under the leadership of Captain Lugard, drawing from the principles of the dual mandate and indirect rule, colonialists employed the then most... -
The use of suitability models and remote sensing to map forest suitability: a systematic review
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Mthokozisi Ndumiso Mzuzuwentokozo Buthelezi --- University of KwaZulu-Natal, South Africa Romano Trent Lottering --- University of KwaZulu-Natal, South Africa Kabir Yunus Peerbhay --- University of KwaZulu-Natal, South Africa Onisimo Mutanga --- University of KwaZulu-Natal, South AfricaThe rapid decline of vegetated landscapes jeopardises vital ecosystem services underpinning climate change mitigation efforts. Restoring and repurposing these landscapes presents a powerful opportunity to recover lost services and strengthen the fight against climate change. This study undertook a comprehensive... -
Floristic and structural changes in a neotropical urban novel forest over 13 years
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Marcelly de Souza Ventura --- Universidade Federal de Juiz de Fora, Brazil Thales Castilhos de Freitas --- Universidade Federal de Juiz de Fora, Brazil Ricardo Montianele de Castro --- Universidade Federal de Juiz de Fora, Brazil Mariana Couto Cruz --- Universidade Federal de Juiz de Fora, Brazil Kelly Antunes --- Universidade Federal de Juiz de Fora, Brazil Taísa Nascimento de Souza --- Universidade Federal de Juiz de Fora, Brazil Breno Moreira --- Universidade Federal de Juiz de Fora, Brazil Fabrício Alvim Carvalho --- Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, BrazilThe ecological importance of non-native species is the main characteristic of novel ecosystems. Pinus elliottii species is highly invasive in tropical forests and is commonly found in secondary forests in Brazil. We investigated the floristic and structural changes in an... -
Inclusive STEM education to fight poverty and inequality: The case of South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Getachew T. Sedebo --- Tshwane University of Technology, Republic of South Africa Ajebush A. Shafi --- Tshwane University of Technology, Republic of South Africa Mammo Muchie --- Tshwane University of Technology, Republic of South Africa Michael Y. Shatalov --- Tshwane University of Technology, Republic of South AfricaPublic higher education institutions (PHEIs) are considered public resources, yet equity in Science, Technology, Engineering, and Mathematics (STEM) fields within these institutions remains a global concern. The South African government acknowledges the importance of STEM education for all, yet its... -
Four decades of research on religious tourism: prevalent themes and future research area
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Vaishali Singh --- Tezpur University (Central), India Anjan Bhuyan --- Tezpur University (Central), IndiaThis study aims to review and provide a comprehensive analysis on religious tourism from 1979 to 2024. It conducts a systematic literature review using the SPAR-4-SLR protocol and other bibliometric analytical techniques. Using performance analysis, the study unpacks the research... -
On p-k-convex solutions for the p-k-Hessian system with the gradient term
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Zhanbing Bai --- Shandong University of Science and Technology, P.R. China Zedong Yang --- Shandong University of Science and Technology, P.R. ChinaIn this paper, we consider a class of nonlinear p-k-Hessian systems with the gradient term -
Embracing the tension: managing short-term horizons in long-term transitions
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Claire Beach --- University of Auckland, New Zealand Sitong Michelle Chen --- Auckland University of Technology, New Zealand Michael SW Lee --- University of Auckland, New Zealand Richard Starr --- University of Auckland, New ZealandThe future of hospitality management necessitates achieving economic, environmental and social sustainability simultaneously, leading to inherent tensions in sustainability. Guided by paradox theory, this article explores how accommodation providers can embrace intertemporal tensions to fulfil short-term operational demands while advancing... -
Reconceptualising success in hospitality internships: a new perspective on students’ achievement factors
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Nicole Vermolen --- NHL Stenden University of Applied Sciences, The NetherlandsThis viewpoint article examines the challenges and factors influencing student success during hospitality internships, particularly those organised by a hotel management school in collaboration with international host companies. A previous study on the topic highlights that only 21% of students... -
Occurrence and pathogenicity of Puccinia graminis f. sp. tritici on wheat in South Africa during 2007 and 2008
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. Terefe --- ARC-Small Grain Institute, Private Bag X29, Bethlehem 9700, South Africa Z.A. Pretorius --- Department of Plant Sciences, University of the Free State, Bloemfontein, South Africa I. Paul --- ARC-Small Grain Institute, South Africa J. Mebalo --- ARC-Small Grain Institute, Private Bag X29, Bethlehem 9700, South Africa L. Meyer --- ARC-Small Grain Institute, Private Bag X29, Bethlehem 9700, South Africa K. Naicker --- ARC-Small Grain Institute, Private Bag X29, Bethlehem 9700, South AfricaSurveys were conducted in 2007 and 2008 to determine the distribution and frequency of pathotypes of Puccinia graminis Pers.:Pers f. sp. tritici Eriks. E. Henn. in South Africa. Stem and/or leaf samples of wheat and triticale (X Triticosecale) infected with... -
Colonisation patterns and reef growth of the invasive serpulid Ficopomatus enigmaticus in a Greek coastal lagoon
Item type: Journal Article • Journal: African Zoology • Authors: Athanasia-Violeta Ntzoumani --- University of Patras, Greece Sarah Faulwetter --- University of Patras, Greece Konstantinos G Nikolakopoulos --- University of Patras, Greece Pavlos Avramidis --- University of Patras, Greece Alexis Ramfos --- University of Patras, GreeceThe reef-building serpulid polychaete Ficopomatus enigmaticus is an invasive species in brackish waters in tropical and temperate zones worldwide and often has massive impacts on ecosystems and anthropogenic activities. In Prokopos Lagoon in Greece, the species has constructed large reefs... -
Diversity, distribution and knowledge gaps of Polychaeta on the continental shelf of southern Namibia
Item type: Journal Article • Journal: African Zoology • Authors: Amoré Malan --- , South Africa Aiden Biccard --- , South Africa Jessica Dawson --- , South Africa Robyn Payne --- , South Africa Kevin Schmidt --- , South Africa Kirti N Gihwala --- , South Africa Ken Hutchings --- , South Africa Deon Louw --- , Namibia Josef Shikeva --- , Namibia Blessing Kamwi --- , Namibia Lapaka Kaimbi --- , Namibia Julien Vumazonke --- , Namibia Megameno Mutaleni --- , Namibia Thomas Shannon --- , United Kingdom Sarah Chordekar --- , United Kingdom Vere Ross-Gillespie --- , United KingdomThis study investigated the diversity, composition and distribution patterns of polychaete macrofauna inhabiting unconsolidated sediments on the continental shelf of southern Namibia. During the austral summer of 2021, 910 Van Veen grab samples were collected from 91 sites in water... -
Refining the morphological characteristics of Dipolydora capensis (Day, 1955) and Dipolydora goreensis (Augener, 1918) (Annelida: Polychaeta: Spionidae) from Atlantic African waters
Item type: Journal Article • Journal: African Zoology • Authors: Vasily I Radashevsky --- Russian Academy of Sciences, Russia Daniel Martin --- , Spain João Gil --- University of Algarve, PortugalTogether with Syllidae, Nereididae and Eunicidae, Spionidae is one of the four more speciose families of polychaete annelids in southern Africa, comprising 25% of the known species and 53–85% of the unresolved cosmopolitans. Among southern African spionids, the genus Dipolydora... -
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,... -
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... -
Integration of livestock into conservation agriculture systems in the Mediterranean climate region of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Pieter A Swanepoel --- Stellenbosch University, South Africa Hendrik PJ Smit --- Stellenbosch University, South AfricaWithin the Mediterranean climate region of South Africa, the livestock sector constitutes a substantial contributor to the regional economy. Livestock integration is prevalent in conservation agriculture systems in this region. Crop rotation involving small grains and canola is combined with... -
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... -
Factors influencing the adoption and usage of blockchain in e-commerce: A systematic literature review
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mishir Roopnarain --- University of Witwatersrand, South Africa Samwel Dick Mwapwele --- University of Witwatersrand, South AfricaBusinesses using e-commerce are worried about their databases and client’s data security. Researchers have suggested businesses should adopt and use blockchain technology to address the security challenges in e-commerce. However, blockchain technology has flaws that inhibit acceptance, adoption, and usage... -
Biometry, hatching efficiency, growth performance and survival of the brine shrimp Artemia franciscana from Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AT Jacob --- Sokoine University of Agriculture, Tanzania IB Kapinga --- , Tanzania AP Mwijage --- Tanzania Fisheries Research Institute (TAFIRI), Tanzania A Luvanga --- Tanzania Fisheries Research Institute (TAFIRI), Tanzania A Mremi --- , Tanzania C Sekadende --- Tanzania Fisheries Research Institute, Tanzania SS Shaban --- Tanzania Fisheries Research Institute, Tanzania HA Lamtane --- Sokoine University of Agriculture, Tanzania AB Matondo --- College of Veterinary Medicine and Biomedical Sciences, Sokoine University of Agriculture, TanzaniaThis study determined the biometry, hatchability and growth performance of a strain of the brine shrimp Artemia franciscana, a species now widely introduced globally, obtained from salt farms in the Tanga Region, Tanzania. The cysts were collected from salt pans... -
Cross-realm biodiversity profile of the South African coastal zone
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LR Harris --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa JB Adams --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa A Dayaram --- Kirstenbosch Research Centre, South African National Biodiversity Institute (SANBI), South Africa LV Dunga --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa N Job --- Kirstenbosch Research Centre, South African National Biodiversity Institute (SANBI), South Africa SP Kirkman --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa SJ Lamberth --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa MC Pfaff --- University of Cape Town, South Africa JL Raw --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa GM Rishworth --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa A Robbins --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa KJ Sink --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa AL Skowno --- Kirstenbosch Research Centre, South African National Biodiversity Institute (SANBI), South Africa H van Deventer --- Council for Scientific and Industrial Research (CSIR), South Africa L van Niekerk --- Institute for Coastal and Marine Research, Nelson Mandela University, South AfricaSouth Africa’s coast is 3 113 km long and includes microtidal shores that experience semi-diurnal tides and mostly high wave energy. From west to east, the cool Benguela Current and the warm Agulhas Current drive steep gradients in climate and... -
Littoral substrates and nest properties of Coptodon rendalli vary with distance from the shoreline in a tropical impoundment, southeast Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RJ Chateya --- National University of Science and Technology, Zimbabwe HGT Ndagurwa --- National University of Science and Technology, ZimbabweThe change in littoral substrates and Coptodon rendalli nest properties along the inshore–offshore gradient of Mushandike Dam in southeast Zimbabwe, impacted by long-term water-level fluctuations, were studied in March 2016. Substrate and nest properties were measured in four contiguous 25... -
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... -
Naming South African frogs and reptiles in nine Indigenous languages
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Fortunate M Phaka --- African Amphibian Conservation Research Group, Unit for Environmental Sciences and Management, North-West University, South Africa Jean Hugé --- Hasselt University, Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Belgium Fortune Ravhuanzwo --- African Amphibian Conservation Research Group, Unit for Environmental Sciences and Management, North-West University, South Africa Maarten PM Vanhove --- Hasselt University, Centre for Environmental Sciences, Research Group Zoology: Biodiversity and Toxicology, Belgium Louis H du Preez --- African Amphibian Conservation Research Group, Unit for Environmental Sciences and Management, North-West University, South AfricaScientific taxonomy, as a standardised means of communicating about wildlife, might have limited use or relevance for wildlife conservation stakeholders with minimal understanding of scientific names. Indigenous language names can improve species-specific communication with non-expert conservation stakeholders due to their... -
Breeding ecology of the Madagascar Grebe Tachybaptus pelzelnii in Bemanevika Protected Area in the northern highlands of Madagascar
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Delphin Rasolonjatovo --- The Peregrine Fund Madagascar Project, Madagascar Lily-Arison Rene De Roland --- The Peregrine Fund Madagascar Project, Madagascar Tolojanahary Andriamalala --- The Peregrine Fund Madagascar Project, Madagascar Marius Rakotondratsima --- The Peregrine Fund Madagascar Project, Madagascar Séraphin Fabrice --- The Peregrine Fund Madagascar Project, Madagascar Stéphanie Razakaratrimo --- The Peregrine Fund Madagascar Project, Madagascar Yverlin ZM Pruvot --- The Peregrine Fund Madagascar Project, Madagascar Russell Thorstrom --- The Peregrine Fund, United StatesWe studied the breeding ecology of the endangered Madagascar Grebe Tachybaptus pelzelnii (family Podicipedidae) at Bemanevika Protected Area, during two consecutive years (October 2020–September 2022). Two breeding units were observed: pairs and trios made up of one male and two... -
Social entrepreneurship in Africa: A systematic multilevel literature review
Item type: Journal Article • Journal: Africa Journal of Management • Authors: David Littlewood --- Sheffield University Management School, UK Giacomo Ciambotti --- Faculty of Economics, Università Cattolica del Sacro Cuore, Italy Andrea Sottini --- Faculty of Economics, Università Cattolica del Sacro Cuore, ItalyThis paper presents the findings of a systematic multi-level literature review of research on social entrepreneurship in Africa. Our review focuses on work from the last decade, since the first issue of the Africa Journal of Management was published, and... -
Factors influencing the quality of financial information: A systematic literature review
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Masidivinga Landu --- University of Aveiro, Portugal Jorge H. Mota --- , Portugal António Carrizo Moreira --- , Portugal Ana Maria Bandeira --- Porto School of Accounting and Business (ISCAP), Polytechnic of Porto (P.PORTO); Center for Organisational and Social Studies (CEOS.PP), PortugalPurpose: This research seeks to identify the key factors influencing the quality of financial information within the context of globalisation and complex commercial transactions. -
Unlocking Northern Cyprus: innovations in destination management for enhanced tourism experiences
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Sima Rahimizhian --- Eastern Mediterranean University, Türkiye Foad Irani --- Final International University, TürkiyeThe tourist sector is currently one of those that has paved the way in the application of intelligent communication and information technology. Intelligent information systems can significantly contribute to the continued growth of the tourist business, particularly virtual tourism, given... -
Tracing the evolution of environmental practices research in the hotel industry: a mixed-review perspective
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Christopher Mensah --- Ho Technical University, Ghana Edem M. Azila-Gbettor --- Ho Technical University, Ghana Divine Tuinese Novieto --- Ho Technical University, Ghana George Harrison Coffie --- Ho Technical University, Ghana Eric Kodzo Adzivor --- Ho Technical University, GhanaThe purpose of the study is to map the terrain of extant literature on green hotel practices conducted over 40 decades (1983–2020) and identify the gaps to be addressed by future research. The study examines the content of 561 articles... -
Techno-economic and environmental assessment of battery integrated wind farm siting across offshore Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Gbubemi Kevin Akporhonor --- Energy and Environment Cranfield University, United KingdomThis study investigates the economic, technical, and environmental impacts of integrating a battery energy storage system (BESS) with an offshore wind farm near Koko Sea Port, Nigeria. As renewable energy curtailment increases and Nigeria’s energy demand grows, energy storage systems... -
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... -
Allometric biomass estimations for Senegalia mellifera and Vachellia reficiens
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jerome M Boys --- Namibia University of Science and Technology, Namibia Gert N Smit --- University of the Free State, South Africa Paul J Malan --- University of the Free State, South AfricaA well established tool that is able to provide a detailed estimation of the leaf and wood biomass of woody plants is the third version of the Biomass Estimate from Canopy Volume (BECVOL3) model. An Excel-based biomass quantification tool is... -
An analysis of totemic animal imagery in Setswana praise poems of the Bakwena ba Mogopa clan of the Southern African Batswana
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Joseph Maleke Sethabela --- Faculty of Humanities, Nelson Mandela University, South AfricaThis article explores the importance of totemic animal imagery in three extracts from Bakwena ba Mogopa praise poems, published in the original Setswana and subsequently translated into English. The poems, identified through convenience sampling, were chosen because they are representative... -
Bio-cryptography application for sending encrypted information using DNA cipher
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Karima Aksa --- Mostapha Ben Boulaid University, Algeria Oussama Larbi --- Mostapha Ben Boulaid University, Algeria Amira Fourar --- Mostapha Ben Boulaid University, AlgeriaCryptography-combined algorithms are obtained by a combination of algorithms, as their reliability is higher and harder to attack than the component algorithms separately. Thus, the combined algorithms are often known for classical cryptography. The goal of encryption is to make... -
Influence of actors’ interactions under agricultural innovation system lens on the adoption of rice innovations in Mvomero district and Ifakara Town council
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sospeter Jibunge Charles --- University of Dar es Salaam, TanzaniaThis study addresses the gap in empirical evidence on how and to what extent interactions among numerous actors within the Agricultural Innovation System (AIS) can influence smallholder farmers’ adoption of rice innovations. The study employed a mixed-methods embedded design to... -
Assessing the adoption potential of online currency exchange systems: A case study of currency dealers in Mogadishu, Somalia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mohamed Ibrahim Nor --- SIMAD University, Somalia Abdifatah Farah Ali --- SIMAD University, SomaliaThis study investigates the readiness of currency dealers in Somalia to adopt online currency exchange systems, addressing the research question: What factors influence the acceptance and adoption of online currency exchange platforms in an unregulated market? Using a quantitative approach,... -
Long-term temporal patterns of human-carnivore conflict in the Chobe Enclave, northern Botswana
Item type: Journal Article • Journal: African Zoology • Authors: Gosiame Neo-Mahupeleng --- Botswana University of Agriculture and Natural Resources, Botswana Richard Fynn --- Okavango Research Institute, University of Botswana, Botswana Moseki Ronald Motsholapheko --- Okavango Research Institute, University of Botswana, Botswana Matshelo Makondo --- , Botswana Kaelo Nkile --- , Botswana Reneilwe Dipheko --- , Botswana Graham IH Kerley --- Centre for African Conservation Ecology, Nelson Mandela University, South AfricaIn some areas, human and carnivore livelihoods overlap causing human-carnivore conflict (HCC), hence there is a need for carnivore conservation efforts. The decline of most large carnivore populations are linked to HCC, primarily due to the killing of carnivores by... -
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... -
Evaluating the histopathology, condition index and stress-on-stress response of caged brown mussels Perna perna for monitoring marine coastal pollution in Senegal
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Tabane --- Centre Régional de Recherche en Écotoxicologie et Sécurité Environnementale (CERES-Locustox), Unité Biologie, Senegal F Cazier --- Centre Commun de Mesures, Université du Littoral Côte d’Opale, France D Dewaélé --- Centre Commun de Mesures, Université du Littoral Côte d’Opale, France K Hylland --- University of Oslo, Norway CT Ba --- Université Cheikh Anta Diop, Senegal M Fall --- Université Cheikh Anta Diop, SenegalThis study is the first in a coastal West African country to evaluate the histopathology, condition index and stress-on-stress response time of caged brown mussels Perna perna for use in pollution monitoring of coastal ecosystems. Perna perna collected from an... -
Triazole sensitivity among South African Puccinia graminis f. sp. tritici isolates
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Isabella du Toit --- University of the Free State, South Africa Botma Visser --- University of the Free State, South Africa Lisa A Rothmann --- University of the Free State, South Africa Willem HP Boshoff --- University of the Free State, South AfricaFungicide applications are important in the successful production of winter cereals in South Africa (SA). While fungicide treatments are critical for crop protection, genetic selection and inheritance of fungicide resistance will lead to a decline in disease control. In this... -
Impact of land use changes on soil physical quality in southeastern Tigray, Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Araya Kahsay --- Adigrat University, Ethiopia Mitiku Haile --- Mekelle University, Ethiopia Girmay Gebresamuel --- Mekelle University, Ethiopia Muktar Mohammed --- Oda-Bultum University, EthiopiaThis study evaluates the effects of land use changes on soil physical quality in southeastern Tigray, northern Ethiopia, using the visual evaluation of soil structure (VESS) method. Soil samples were collected from cropland, grassland, and shrubland sites during two field... -
The role of academic institutions in leveraging innovation through patenting activities: A diagnostic of the Moroccan experience focusing on the agricultural sector
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sanaa Zebakh --- Ibn Tofail University, Morocco Jaouad Anissi --- EUORMED Research Centre EI-BIOMEDTECH, EUROMED University of Fes, Morocco, Salim Bounou --- EUORMED Research Centre EI-BIOMEDTECH, EUROMED University of Fes, Morocco, Mohammed Sadiki --- Rabat-Instituts, MoroccoIn the late 2000s, Morocco implemented various actions and programmes to establish a National Innovation System, which has helped to bolster innovation and patenting activities within higher education and research institutions. This article investigates the Moroccan innovation framework that facilitated... -
Revitalizing tribal economic systems through indigenous entrepreneurship: Innovations and strategies
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Anjali Chandulal Lakum --- Parul Institute of Social Work, Parul University, IndiaAmid growing global interest in sustainable and inclusive development, indigenous entrepreneurship and grassroots innovations are increasingly recognized as powerful yet underexplored pathways for community resilience. This study investigates how such innovations contribute to the revitalization of tribal economic systems, with... -
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... -
Risk and protective factors of suicide ideation and attempts among justice-involved black girls: A latent profile analysis
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Lin Liu --- University of Florida, United States of AmericaBackground: Justice-involved female youth from minority racial groups are a hard-to-reach youth population that are removed from schools, families, and communities. They are under-represented in school survey data. The present study aimed to utilise the Interpersonal-Psychological Theory of Suicide to... -
On the stability of a system with one control and with non local boundary conditions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Farida Belhannache --- University of Jijel, Algeria Salim A. Messaoudi --- University of Sharjah, UAEIn this paper, we consider a system of two hyperbolic equations with Bessel operators and weighted integral conditions. We use a non traditional multiplier method to establish a decay result of solutions. -
An overview of Xitsonga reduplication constructions
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Lebogang Steven Shirindzi --- University of Venda, South Africa Arnold Mushwana --- University of South Africa, South AfricaWord-formation processes leading to abbreviations such as clipping, blending and acronyms occur only partially, or do not occur at all, in Xitsonga. In constrast, one of the most productive word-formation processes in Xitsonga is reduplication. Several studies have been conducted... -
War metaphors as names for medical concepts in Sesotho newspaper HIV and AIDS communication
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Ntšoeu Seepheephe --- National University of Lesotho, LesothoThe study examines the behaviour and the ideological functions of war metaphors that are used in Sesotho newspaper communication on HIV and AIDS. Using the dynamic systems approach towards metaphor, I explore the use of these metaphors in three major... -
Blockchain technology in healthcare within the global south: mapping the area and developing a research scenario
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Josue Kuika Watat --- University of Oslo, Norway Ebenezer Agbozo --- Ural Federal University, Russia Rania El-Gazzar --- University of Agder, NorwayAfrica’s healthcare systems face profound structural challenges, including fragmented infrastructure, systemic data vulnerabilities, and unreliable medical supply chains, necessitating innovative, context-specific solutions. Blockchain technology has emerged as a transformative tool in global healthcare, yet research remains disproportionately focused on high-income... -
Assessing the systemic risk in Rwandan banking sector using clustering approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Patrick Mugenzi --- University of Rwanda, Rwanda Annie Uwimana --- University of Rwanda, RwandaThis article assessed the dynamics of homogeneity (similarities) among banks in Rwanda from 2017 to 2021 by utilizing agglomerative clustering techniques on a detailed breakdown of the banking system’s balance sheet structure. Specifically, we analyzed homogeneity in the banks’ portfolios,... -
Effects of diamond mining on sandy beaches in southern Namibia – the use of Tylos granulatus (Isopoda: Oniscidea) as an indicator species
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Hutchings --- , South Africa A Rees --- , South Africa A Pulfrich --- , South Africa BM Clark --- , South AfricaSandy beaches provide vital ecosystem services and support diverse ecological communities but are increasingly threatened by anthropogenic pressures. In particular, intertidal mining disrupts sandy beaches and challenges their resilience, yet these ecosystems retain some capacity for environmental recovery. This study... -
Advancing scholarship where Africa-based scholars dominate: A systematic review of migrant entrepreneurship in Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Clavis Nwehfor Fubah --- University of Pretoria, South Africa Helena Barnard --- University of Pretoria, South AfricaMigrant entrepreneurs are generally assumed to come from rather than settle in Africa. This paper systematically reviews scholarship on immigrant entrepreneurs operating on the continent, a topic of interest to Africans more than the general scholarly community. Using Scopus and... -
Macro-level determinants of research output in Nigerian knowledge institutions: A case study of ICT researchers
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bolanle A. Adewusi --- , Canada Oluseye Jegede --- University of Johannesburg, South AfricaThis study explores the factors that influence ICT research productivity across Nigerian universities and government research agencies. Using a mixed-methods approach, the research combines conceptual analysis with quantitative techniques, drawing on the PESTLE model, the Entrepreneurship Ecosystem, and the Triple... -
Exploring the strategies shaping application programming interface development and integration in digital music platforms: A qualitative case study
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Joshua Ofoeda --- University of Professions Studies, Ghana Richard Boateng --- University of Ghana, Ghana Choudrie Jyoti --- University of Hertfordshire, UK John Effah --- University of Ghana, GhanaApplication Programming Interfaces (APIs) have become essential to contemporary software development, supporting the growth of digital platforms and ecosystems. APIs enable developers to create applications by providing functionalities that facilitate communication. Despite their importance in supporting digital platforms and ecosystems,... -
GeoHostel: Location-based recommendation of hostels in the context of higher education through geospatial technology
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nana Yaw Asabere --- Accra Technical University, Ghana Gare Lawson --- Raycom Technologies, Ghana Bernice Quartey-Papafio --- Ghana Police Service, Ghana Marcellinus Kuuboore --- University of Professional Studies, Ghana Nana Yaw Duodu --- Accra Technical University, GhanaAn efficient data management system is essential in the field of student housing to guarantee the availability of high-quality data that can make it easier to find appropriate hostels. Although recommender systems concerning hotels and tourism points of interest (POI)... -
High adult mortality of African Penguins Spheniscus demersus in South Africa after 2004 was likely caused by starvation
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robert JM Crawford --- Fisheries and the Environment, South Africa Richard B Sherley --- Environment and Sustainability Institute/Centre for Ecology and Conservation, University of Exeter, United Kingdom Lynne J Shannon --- University of Cape Town, South Africa Alistair M McInnes --- BirdLife South Africa, South Africa Tegan Carpenter-Kling --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa Azwianewi B Makhado --- Fisheries and the Environment, South AfricaFrom 2004–2011, following the collapse of sardine Sardinops sagax, a main food for African Penguins Spheniscus demersus, to < 25% of its maximum recorded abundance, survival of penguins breeding at Dassen and Robben islands, north of Cape Town, South Africa... -
Investigation of the variables affecting the competitiveness of the sawmill industry and their interactions using systems dynamics modelling
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Vhuhwavho Tshavhungwe --- University of Pretoria, South Africa Rudolph Oosthuizen --- University of Pretoria, South Africa Schalk Grobbelaar --- University of Pretoria, South AfricaThe sawmill industry, just like many other industries, is a complex system with several variables at play. This complexity impacts strategy implementation and decision-making in the individual sawmills. The study aimed to examine the different variables interacting with each other... -
Silvicultural management strategies for climate change mitigation with the focus on plantation forests
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ben du Toit --- Stellenbosch University, South AfricaThis technical note explores several practical actions whereby short-rotation plantation forests in warm climates can be managed for increased resilience in the face of climate change. It includes landscape level issues such as ecosystem resilience, limiting the invasive tendencies of... -
Listening to the voices of Namibia’s recreational anglers to improve shore-based fishery resource use and management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NMC Gusha --- University of Namibia, Namibia AM Veii --- University of Namibia, Namibia NM Nghipangelwa --- University of Namibia, Namibia AS Shikongo --- University of Namibia, Namibia CS Bova --- Rhodes University, South Africa A Kanyimba --- University of Namibia, Namibia GH Engelhard --- Fisheries and Aquaculture Science (Cefas), United Kingdom K Hyder --- Fisheries and Aquaculture Science (Cefas), United Kingdom B Snow --- Scottish Association for Marine Science (SAMS), United Kingdom WM Potts --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa MR Wilhelm --- University of Namibia, NamibiaIn most fisheries, the traditional centralised, top-down management approach is still prevalent despite its limited success. While a bottom-up ecosystem-based approach is increasingly preferred, a shift in focus from purely ecological considerations to a socio-ecological system approach is necessary. The... -
The movements of adult leerfish Lichia amia in the Breede Estuary, Western Cape, South Africa: insights from acoustic telemetry
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WM Kilian --- Rhodes University, South Africa TS Murray --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa JD Filmalter --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa PD Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa TF Næsje --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa RJ Wasserman --- Rhodes University, South AfricaLeerfish Lichia amia inhabit estuaries as juveniles before moving between estuaries and the marine environment as sub-adults and adults. While adults remain mostly in the marine environment, philopatry has been observed, with individuals returning to areas previously used, including estuaries... -
Assessing the thermal tolerance of a cosmopolitan eurythermal species, the flathead mullet Mugil cephalus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DL Mukhari --- Rhodes University, South Africa A-R Childs --- Rhodes University, South Africa BA Ziko --- Rhodes University, South Africa TS Murray --- Rhodes University, South AfricaWater temperature is a key abiotic factor affecting fish physiology, behaviour and distribution, with fluctuations impacting species assemblages and habitat use. The flathead mullet Mugil cephalus is a eurythermal species with a cosmopolitan distribution across tropical, subtropical and temperate coastal... -
Horizon scanning to identify priority research questions for the South African marine shore-based recreational fishery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Hewett --- Rhodes University, South Africa CS Bova --- Rhodes University, South Africa EC Butler --- Rhodes University, South Africa A-R Childs --- Rhodes University, South Africa MW Farthing --- Rhodes University, South Africa BQ Mann --- Rhodes University, South Africa JB Mann-Lang --- Rhodes University, South Africa AC Winkler --- Rhodes University, South Africa K Hyder --- Centre for Environment Fisheries and Aquaculture Science, United Kingdom WM Potts --- Rhodes University, South AfricaThe marine shore-based recreational fishery (MSBRF) is the largest sector of the South African linefishery. The high rate of participation, widely dispersed effort, the diversity of motivations, attitudes and perceptions of its participants, and the large number of target species... -
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... -
Climate adaptation, geopolitics, and structural exclusion in South African agriculture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael J Savage --- South African Journal of Plant and Soil,Southern African agriculture stands at a critical intersection of accelerating climate risk and entrenched structural inequality. While climate change increasingly shapes global research and policy agendas, other intersecting forces—such as the divide between large-scale commercial agriculture and smallholder farming, the... -
Exploring the integration of indigenous languages into teaching and learning practices at primary schools in South Africa
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Mousin Omarsaib --- Durban University of Technology, South Africa Muvhulawa Matumba --- Durban University of Technology, South Africa Patricia Badenhorst --- Durban University of Technology, South Africa Ghulam Masudh Mohamed --- Durban University of Technology, South AfricaThis systematic literature review explores the integration of indigenous languages (ILs) into teaching and learning practices at primary schools in South Africa. The authors examine the current state and preparedness of teachers in integrating ILs to enhance learning. The PRISMA... -
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... -
General decay results for a nonlinear Viscoelastic Timoshenko system
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Ibtissam Fekrache --- Higher Normal School of Technological Education (ENSET), Algeria Djalal Boucenna --- Higher Normal School of Technological Education (ENSET), Algeria Amar Chidouh --- Chadli Bendjedid University, Algeria Djamel Ouchenane --- Amar teledji University Laghouat, Algeria Salah Boulaaras --- College of Sciences, Qassim University, Saudi Arabia Rashid Jan --- College of Sciences, Qassim University, Saudi ArabiaIn this paper, we focus on the Timoshenko viscoelastic system associated with a nonlinear term. The general stability is established by means of the energy method under the assumption of equal speeds, leading to an energy decay rate that includes... -
Functional diversification and performance of wheat–canola rotations in the Western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A Louw --- Stellenbosch University, South Africa PA Swanepoel --- Stellenbosch University, South Africa S van der Westhuizen --- Stellenbosch University, South Africa J Strauss --- Stellenbosch University, South AfricaCrop rotation serves as a fundamental pillar within conservation agriculture (CA) farming systems, enabling the integration of more diverse crops and livestock. With increasing weather variability, new methods are needed to assess the long-term effects of diversification on the agronomic... -
Breeding population status and nesting preferences of the White-backed Vulture Gyps africanus in western Serengeti, northern Tanzania
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Vainess Laizer --- Department of Wildlife Management, College of Forestry, Wildlife and Tourism, Sokoine University of Agriculture, Tanzania Peter S Goodman --- Grumeti Fund, Tanzania Noel Mbise --- Grumeti Fund, Tanzania Claire Bracebridge --- The Peregrine Fund, The World Center for Birds of Prey, United States Kate Tiedeman --- Max Planck Institute for Animal Behavior, Germany Corrine J Kendall --- The Peregrine Fund, The World Center for Birds of Prey, United States Robert Byamungu --- Department of Wildlife Management, College of Forestry, Wildlife and Tourism, Sokoine University of Agriculture, Tanzania Shombe N Hassan --- Department of Wildlife Management, College of Forestry, Wildlife and Tourism, Sokoine University of Agriculture, Tanzania Kristen D Snyder --- Grumeti Fund, TanzaniaThe White-backed Vulture Gyps africanus is Critically Endangered because of its decline across its range in Africa, largely due to poisoning. The western corridor of the Serengeti ecosystem in northern Tanzania hosts a significant number of individuals of this species... -
Monitoring survival probabilities of Cape Vultures Gyps coprotheres in South Africa, using GPS tracking data
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Sophie Pulcella --- Knowsley Safari, Prescot, United Kingdom Kerri Wolter --- Vulpro NPC, South Africa Juliana Pinto --- Vulpro NPC, South Africa Brian Kuhn --- Vulpro NPC, South Africa Wolfgang Fiedler --- Max Planck Institute of Animal Behaviour, GermanyThe Cape Vulture Gyps coprotheres is a species of Old-World vulture endemic to southern Africa. Currently listed as ‘Vulnerable’ by the IUCN, they face increasing threats from anthropogenic hazards, such as collisions with man-made infrastructure and poisoning events, leading to... -
‘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... -
Daily herd movements across the wet and dry season in the semi-arid communal rangelands of Namaqualand, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MH Tapela --- Department of Biodiversity and Conservation Biology, University of the Western Cape, South Africa MI Samuels --- Department of Biodiversity and Conservation Biology, University of the Western Cape, South Africa CF Cupido --- ARC–Animal Production (Range and Forage Sciences), South Africa A Finca --- ARC–Animal Production (Range and Forage Sciences), South Africa TC Zondani --- ARC–Animal Production (Range and Forage Sciences), South Africa A Engelbrecht --- Department of Biodiversity and Conservation Biology, University of the Western Cape, South AfricaThe role of indigenous grazing management practices in sustainable natural resource use has been widely identified and recognised in the literature. However, the grazing management practices of Nama pastoralists in the semi-arid regions in Namaqualand in South Africa have not... -
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... -
Will I survive? Assessing the thermal tolerance of an estuary-dependent mugilid, Chelon dumerili, in a changing climate
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BA Ziko --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa AR Childs --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa DL Mukhari --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa TS Murray --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaDetermining the thermal tolerance limits of fishes is crucial for understanding their persistence in the face of anthropogenic climate change. This study used dynamic critical thermal assays to determine the upper (CTmax) and lower (CTmin) critical thermal limits of an... -
The impact of the COVID-19 pandemic on sexual and reproductive health performance indicators at public health care facilities in Ekurhuleni Health District, South Africa: An interrupted time series analysis
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Podestah Surprise Mabale --- University of Pretoria, South Africa Anesu Marume --- University of Pretoria, South Africa Alfred Musekiwa --- University of Pretoria, South AfricaBackground: The COVID-19 pandemic disrupted essential health services globally, including sexual and reproductive health (SRH). -
Marine–estuarine connectivity, salinity and sedimentation in the St Lucia system, South Africa, following reconnection with the uMfolozi River
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RH Taylor --- Independent Hydro-Ecologist, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity, South Africa CE Fox --- Ezemvelo KwaZulu-Natal Wildlife, St Lucia Estuary, South Africa JB Adams --- Botany Department and Institute for Coastal & Marine Research, Nelson Mandela University, South AfricaThis study reviews selected physical and biotic responses of the St Lucia estuarine system to the recently implemented management approach of re-establishing the connection between the uMfolozi River and the St Lucia Estuary. This connection was severed in the 1950s... -
Comparing fixed count and observed/expected taxa approaches in diatom-based water quality assessment: implications for monitoring efficiency and accuracy
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Holmes --- Africa Earth Observatory Network (AEON) – Earth Stewardship Science Research Institute (ESSRI), Nelson Mandela University, South Africa JC Taylor --- Unit for Environmental Sciences and Management (UESM), North-West University, South Africa B Linol --- Africa Earth Observatory Network (AEON) – Earth Stewardship Science Research Institute (ESSRI), Nelson Mandela University, South AfricaDiatom-based indices are widely used for freshwater bioassessment, yet methodological variability, particularly in count strategies, can influence ecological classification outcomes. This study compares a traditional fixed count (FC) approach with an observed/expected taxa (OE) strategy across five riverine sites in... -
Seeds of cooperation, fruits of innovation: Understanding the Iranian vaccine industry in the COVID-19 pandemic-era through the lens of the innovation ecosystem
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mitra Aminlou --- Allameh Tabataba'i University, Iran Soroush Ghazinoori --- Allameh Tabataba'i University, Iran Mehdi Goodarzi --- Allameh Tabataba'i University, Iran Mahdi Elyasi --- Allameh Tabataba'i University, Iran Mostafa Ghanei --- Baqiyatallah University of Medical Sciences, IranThe COVID-19 pandemic highlighted the complexities of vaccine industry innovation. This study aims to understand how Iran’s vaccine industry rapidly responded to the COVID-19 pandemic under severe sanctions by applying an innovation ecosystem-as-structure framework. It addresses two research objectives: identifying... -
Industry 4.0 application framework for sustainable reverse logistics: A systematic literature review
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Reji John --- Galgotias University, India Mujibur Rahman --- Galgotias University, IndiaThe significance of sustainability necessitates organizations to implement technological solutions in their business practices. Integrating Industry 4.0 with current business practices enables the organization to enhance forward logistics sustainability. However, its integration is complex and unpredictable in reverse logistics due...
