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Role of Eucalypt Plantations in Timber Supply and Forest Conservation in Sub-Saharan Africa
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- Institute for Commercial Forestry Research, South AfricaThe role of eucalypt plantations in timber supply and forest conservation in Sub-Saharan Africa was investigated. The annual destruction of 11,5 million ha of tropical forest is highlighted, the various causes indicated and the controversy whether fast-growing plantations and woodlots... -
The Response of Ocotea bullata (Lauraceae) to Flooded Conditions
Item type: Journal Article • Journal: South African Forestry Journal • Authors: W.A. Lübbe --- Saasveld Forestry Research Centre, Division of Forest Science and Technology,The response of Ocotea bullata (Lauraceae), stinkwood, grown under a range of flooded conditions, was studied. Flooding results in chlorosis and shedding of leaves and may end in death if continued for prolonged periods. Die-back is the result of several... -
The Blackwood Group System: its relevance for sustainable forest management in the southern Cape
Item type: Journal Article • Journal: South African Forestry Journal • Authors: CoertJ. Geldenhuys --- Division of Water, Environment and Forestry Technology, Southern AfricaThe invasion status of Australian blackwood, Acacia melanoxylon, is assessed against its value as a commercial tree in the southern Cape forests. The species was introduced from Australian rain forests and planted extensively in the southern Cape forests since 1909... -
The effect of nitrogen on the development and photosynthetic activity of digitaria eriantha steud. subsp. eriantha
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: MaureenM. Wolfson --- Department of Botany, C.F. Cresswell --- Department of Botany,Digitaria eriantha Steud. subsp. eriantha, plants were grown under controlled conditions and treated with different concentrations and forms of nitrogen. The plants showed a preference for nitrate nitrogen, as opposed to ammonium nitrogen, with greater total dry matter production and... -
The contribution of pastures and veld to the feeding of dairy and beef herds in the natal midlands
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.A.H. Heard --- , N.M. Tainton --- Department of Grassland Science, P.J. Edwards --- Late of the Department of Agriculture (Natal Region),Established pastures in the Natal Midlands provide a very substantial proportion of the roughage requirements of dairy enterprises both in summer and winter. There is some evidence that good pastures, producing high quality roughage, can maintain high herd average yields,... -
Evaluation of veld potential in east griqualand using beef cattle under two grazing management systems
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: U.P. Kreuter --- Department of Agriculture (Natal Region), G.M. Brockett --- Department of Agriculture (Natal Region), A.D. Lyle --- Department of Agriculture (Natal Region), N.M. Tainton --- Department of Grassland Science, D.I. Bransby --- Department of Grassland Science,Beef production from veld, in the short term, was found to be greater under a continuous grazing system than under a rotational grazing system. Average daily gains decreased from a maximum in late‐spring and the highest three‐year mean value was... -
Conservative stocking or maximum profit: A grazing management dilemma?
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region), P.G. King --- Department of Agriculture (Eastern Cape Region),Swards in the False Thornveld of the Eastern Cape are generally stocked considerably in excess of the rate currently recommended for maximised production on a sustained basis. Economic analysis of the relationship between stocking rate and production per ha reveals... -
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... -
Characteristics of fire behaviour in the montane grasslands of natal
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: TheresaM. Everson --- Department of Environment Affairs, Directorate of Forestry, F.R. Smith --- Department of Environment Affairs, Directorate of Forestry, C.S. Everson --- Department of Environment Affairs, Directorate of Forestry,Fire behaviour characteristics were investigated in the montane grasslands of the Natal Drakensberg. The behaviour of experimental fires was measured together with the accompanying biotic and abiotic conditions. Estimates of heat yield, mass of available fuel and forward rate of... -
Recent trends in grazing management philosophy in South Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N.M. Tainton --- Department of Grassland Science,Reasoned argument by researchers in veld management in South Africa and elsewhere has not generally supported a number of contentious recommendations made in recent years in the popular and semi‐popular press. The only major changes to general management thinking has... -
Produksie en kwaliteit van ‘n aantal grasspesies in die Combretum‐veld van noord‐transvaal
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.A. Pieterse --- Departement Plantproduksie, Fakulteit Landbouwetenskappe, J.O. Grunow --- Departement Plantproduksie, Fakulteit Landbouwetenskappe,Die produksie en kwaliteit van vyf spesies (Themeda triandra, Heteropogon contortus, Digitaria eriantha var. pentzii, Schmidtia pappophoroides en Eragrostis rigidior) is by verskillende frekwensies van ontblaring op ontbosde en onontbosde bosveld gemeet. In die daaropvolgende jaar is intensiteit bygebring met... -
Die wiskundige simulering van koolhidraattranslokasie in natuurlike grasveld1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H J Fouché --- Departement van Landbou en Watervoorsiening (Vrystaatstreek), JM De Jager --- Departement Landbouweerkunde, J Booysen --- Departement van Landbou en Watervoorsiening (Karoostreek),Die groeifunksies benodig vir die simulasie van produksie van ‘n Themeda triandra‐grasveld met behulp van die PUTU 11 simulasiemodel is ontwikkel. Vir die ontwikkeling van die model is die veldproduksiedata van die 1980/81 groeiseisoen gebruik waarna dit suksesvol, vir drie... -
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... -
The influence of different forms and concentrations of nitrogen on the growth and metabolism of digitaria eriantha and chloris Gayana grown under saline conditions
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J M Brauer --- Department of Botany, MaureenM Wolfson --- Department of Botany,Chloris gayana and Digitaria eriantha plants were watered with nutrient media containing a high concentration of sodium chloride (150 mM) and either high (200 mg/l) or low (25 mg/l) concentrations of nitrate nitrogen and ammonium nitrogen. Dry mass and leaf... -
Veld management : A challenge to agricultural extension
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: T J Bembridge --- Faculty of Agriculture,This paper discusses the problems of communicating veld management practices to farmers within the framework of the knowledge generation and diffusion system. Suggestions are made for improving the system through greater involvement of farmers in research and extension, and for... -
Growth analysis of themeda triandra and sporobolus fimbriatus tillers in semi‐arid grassveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region),Marked populations of Themeda triandra and Sporobolus fimbriatus tillers were sequentially harvested at fortnightly intervals both under irrigation and under unamended moisture conditions. Sampling covered a period from tiller initiation through to senescence after flowering. -
Refinement of a model describing forage production, animal production and profitability as a function of bush density in the false thornveld of the eastern cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.C. Stuart‐Hill --- Department of Agriculture and Water Supply (Eastern Cape Region),An existing model describing the influence of Aeacia karroo density on forage production, animal production and profitability is reviewed and amended to introduce recent research results. -
Veldtoestand en neiging in Kalahari‐duineveld onder ‘n ekstensiewe veeboerderystelsel
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.H. Fourie --- Departement van Landbou (Vrystaatstreek), N.J. de Wet --- Departement van Landbou (Vrystaatstreek), J.J. Page --- ,Plantopnames is gedurende 1970 tot 1985 in die Kalahari‐duineveld (Acocks, 1975; Veldtipe no. 16a4) op die proefboerdery‐eenheid Massakloutjie in Noordwes‐Kaapland onderneem. Reënval het gedurende die proefperiode gewissel tussen 111 mm (1982–83) en 593 mm (1973–74). Die totale basale plantebedekking het... -
Die evaluasie van droëland Cenchrus ciliaris L. cv Molopo vir speenkalf‐produksie in die sentrale grasveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: L.G. du Pisani --- , J.P. van Niekerk --- , H.O. de Waal --- , I.W. Knight --- ,Speenkalfproduksie op droëland Cenchrus ciliaris‐weiding is by drie veeladings onder aanhoudende beweiding ondersoek (1978–83). Verskille in beskikbare bogrondse fitomassa (BBF), speenmassa en die ekonomie van speenkalfproduksie word bespreek. -
The influence of tiller age and time of year on the growth of Themeda tri andra and Sporobolus fimbriatus in semi‐arid grassveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region),Sequential growth measurements were made on successive populations of Themeda triandra and Sporobolus fimbriatus tillers initiated at different times of the year. The independent influences of tiller age and time of year on tiller growth were isolated by deriving growth... -
The effect of form and level of nitrogen fertlization on the yield of Digitaria eriantha Steud*
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N.F.G. Rethman --- Department of Plant Production,On dryland Digitaria eriantha ammonium sulphate and limestone ammonium nitrate were superior to potassium nitrate and urea. With reference to the level of nitrogen fertilization it was found that levels in excess of 300 kg N/ha, and up to 400... -
A mathematical model used to describe animal performance on kikuyu and coastcross II pastures
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: T.P. Karnezos --- Department of Grassland Science, N.M. Tainton --- Department of Grassland Science, D.I. Bransby --- Department of Grassland Science,Data collected from a controlled grazing trial, in which the quality and quantity of kikuyu (Pennisetum clandestinum) and Coastcross II (Cynodon hybrid) pastures fertilized at 2 nitrogen levels (150 and 300 kg N/ha/a) and stocked at 3 stocking rates (8,05,10,74... -
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)... -
Growth patterns and annual growth cycle of Acacia karroo Hayne in relation to water stress I. Leaf and shoot growth
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: W.R. Teague --- , B.H. Walker --- Botany Department,A field study was conducted to describe the growth patterns of A. karroo at different levels of water stress in different edaphic situations. -
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... -
The influence of nitrate and ammonium forms of nitrogen fertilizer on the growth and osmoregulation of digitaria eriantha and Chloris gayana grown under saline conditions
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: LesleyJ. Gray --- Department of Botany, MaureenM. Wolfson --- Department of Botany,Digltaria eriantha and Chloris gayana were grown under controlled conditions for three months and were treated with a nutrient solution containing 150 mMol NaCl and the following nitrogen sources: 25 or 200 mg/l NH4 +‐N or NO3 −‐N or no... -
The rate of consumption of bush and grass by goats in a representative acacia karroo savanna community in the Eastern Cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: W.R. Teague --- ,Consumption of browse and grass in a representative Acacia karroo savanna community was measured. Acacia karroo was preferred to grass. It was selected almost exclusively when available at high leaf densities. Grass was consumed in significant amounts only when approximately... -
An evaluation of veld condition assessment techniques in Highland Sourveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M.B. Hardy --- Department of Agriculture (Natal Region), Republic of South Africa C.R. Hurt --- Department of Agriculture (Natal Region), Republic of South AfricaAn evaluation of six methods used to index veld condition showed that the majority provided indices that were insensitive to long‐term grazing impact. However, certain species were found to either increase or decrease in relative abundance with an increase in... -
Sequence and process of species selection by cattle in relation to optimal foraging theory on an old land in the Natal Sour Sandveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.J. O'Reagain --- Department of Agriculture and Water Supply, Republic of South Africa M.T. Mentis --- Department of Botany, Republic of South AfricaThe sequence in which cattle grazed four grass species during a grazing period was monitored at four stages through the grazing season. Data collected revealed that: (i) species could be classed as being of preferred, avoided or intermediate acceptability, (ii)... -
‘n Vergelyking van wei‐ en voergewasse vir die produksie van slaglammers in die Pretoria‐ Witwatersrand‐Vereeniging(PWV)‐gebied
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.A. Pieterse --- Departement Plantproduksie, Republiek van Suid‐Afrika J.O. Grunow --- Departement Plantproduksie, Republiek van Suid‐Afrika N.F.G. Rethman --- Departement Plantproduksie, Republiek van Suid‐Afrika W.A. van Niekerk --- Departement Veckunde, Republiek van Suid‐AfrikaA comparison of pasture and fodder crops for the production of slaughter lambs in the Pretoria‐Witwatersrand‐Vereeniging (PWV) area. A number of pasture and fodder species were evaluated for the production of mutton with weancr lambs. Animal performance and meat production... -
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... -
The effects of continuous and rotational grazing of sourveld on the quality of herbage selected by Simmentaler heifers
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: U.P. Kreuter --- Department of Grassland Science, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaA grazing trial was conducted at the Kokstad Agricultural Station to compare the dry matter digestibility (DMD) and crude protein content (CP) of diets selected by four fistulated cattle which were continuously and rotationally grazing sourveld. Two stocking rates of... -
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... -
The effect of nitrogen fertilization on the quality of Kikuyu silage
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: Maria de Figueiredo --- Department of Agriculture and Water Supply (Natal Region), Republic of South Africa J.P. Marais --- Department of Agriculture and Water Supply (Natal Region), Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaSmall‐scale laboratory silos were used to study the fermentation process of Kikuyu (Pennisetum clandestinum Hochst) silage prepared from grass grown at three nitrogen fertilizer levels (300, 400 and 500 kg N/ha/year). Kikuyu grass was cut at three and six‐week growth... -
The relationship between sward structure, ingestive behaviour and dietary quality in cattle grazing a Chloris gayana pasture
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.J. O'Reagain --- Department of Agricultural Development, Republic of South AfricaThe relationship between sward structure, ingestive behaviour (bite size, biting rate and intake rate) and dietary crude protein (CP) content was studied on a Chloris gayana pasture at different growth stages using oesopha‐geally‐fistulated steers. As the pasture matured, leaf table... -
The effect of source of nitrogen on the dry matter yield, nitrogen and nitrate‐N content of Lolium multiflorum
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: R.J. Eckard --- Department of Agriculture and Water Supply (Natal Region), Republic of South AfricaThree sources of N fertilizer (urea, limestone ammonium nitrate (LAN) and ammonium sulphate) showed no consistent significant trends in terms of the dry matter yield and nitrogen or nitrate‐N content of midmar ryegrass. Ammonium sulphate was found to acidify the... -
“n Voorlopige evaluasie van eenjarige, wintergroen weidings met speenlammers, in die Oos‐Kaapse suurveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: T.G. Coetzee --- Departement van Landbou‐ontwikkeling (Oos‐Kaapstreek), Republiek van Suid‐Afrika G.R. Barnes --- Departement van Landbou‐ontwikkeling (Oos‐Kaapstreek), Republiek van Suid‐Afrika W.S.W. Trollope --- Agronomie Departement, Landboufakulteit, CiskeiA preliminary evaluation of annual, wintergreen pastures using weaned lambs in the eastern Cape sourveld. Animal production and feed availability on oats, vetch and oats/vetch pastures were evaluated under continuous grazing, at three stocking rates, using weaned lambs. The oats... -
Are multi‐paddock grazing systems economically justifiable?
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 AfricaThe financial implications of few‐ and multi‐paddock systems were modelled by a discounted cash flow analysis with the (discounted) present value as the dependent variable, and number of paddocks, farm run‐down time, time horizon and discount rate as the independent... -
A model for the evaluation of different production strategies for animal production from rangeland in developing areas: An overview
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: F.D. Richardson --- Department of Applied Mathematics, Republic of South Africa B.D. Hahn --- Department of Applied Mathematics, Republic of South Africa P.I. Wilke --- Department of Animal Science, Republic of South AfricaAn interactive user‐friendly computer package is being developed to assist planners and managers with the evaluation of different livestock production strategies in semi‐arid regions. It comprises a hierarchy of simulation models that predict over time the effects of past and... -
An evaluation of the empirical basis for grazing management recommendations for rangeland in southern Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.J. O'Reagain --- Department of Agricultural Development (Eastern Cape Region), Republic of South Africa J.R. Turner --- Department of Grassland Science, Republic of South AfricaAnalysis of over 50 grazing experiments conducted in southern Africa does not support certain management recommendations. Furthermore, the conclusions of some experiments are questionable owing to poor experimental design or confirmation bias. Based on available evidence, it was concluded that... -
Seisoensveranderinge in die koolhidraatinhoud van jong appelbome
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. J.C. Stassen --- ,Gereelde ontledings van die koolhidraatfraksies in jong appelbome het getoon dat suiker 'n relatief klein gedeelte van die koolhidrate in die boomdele uitmaak, en veral in die wortels voorkom. Stysel akkumuleer in die wortels tot finale blaarval in die winter,... -
Effect of exchangeable sodium and phosphogypsum on the hydraulic properties of several South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.M. du Plessis --- , I. Shainberg --- ,The susceptibility of soils to the deleterious effects of sodicity was assessed for samples which varied with respect to physical, mineralogical and other properties. For this purpose soil samples were collected from different locations in South Africa. The effect of... -
Die rol wat nitraat: ammoniumverhoudings speel in die effektiewe benutting van stikstof by Zea mays L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F.G. Adriaanse --- , J.J. Human --- Departement Agronomie,Die invloed van verskillende nitraat: ammoniumverhoudings by sub- en supra-optimale stikstofkonsentrasies op die opname en benutting van stikstof is ondersoek. Effektiewe stikstofbenutting is in terme van saadopbrengs per eenheid opgeneemde stikstof gemeet. Die beste nitraat: ammoniumverhouding was 3:1 by 100... -
Enkele faktore wat die vruggroei van sitrus beïnvloed
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.F. du Plessis --- , Republiek van Suid-Afrika H.M. du Plessis --- , Republiek van Suid-Afrika'n Ondersoek het aangetoon dat 'n hoogsbetekenisvolle (r = 0,96) verwantskap bestaan tussen waterverbruik van 'n volwasse sitrusboom en vruggroeitempo. Waterverbruik bereik 'n maksimum van 80–90 l/dag gedurende die periode Desember tot einde Maart, dit is dieselfde tyd wanneer vruggrootte... -
Nitrogen losses from urea, UAN and LAN when applied to four different soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. D.P. Botha --- , Republic of South AfricaNitrogen transformations and losses from three nitrogenous fertilizers, urea, urea ammonium nitrate (UAN) and limestone ammonium nitrate (LAN), when applied to four South African soils, were compared in a laboratory study. The highest losses on all these soils were experienced... -
Initial seedling growth rates in a semi-dwarf spring wheat collection
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.F. Marais --- Department of Genetics, Republic of South Africa P.S. Botma --- Department of Agriculture and Water Supply, Republic of South AfricaA relationship was observed between seedling growth rate and seedling emergence under conditions of soil capping. Coleoptile and root growth rates were strongly influenced by the origin of the seed sample and the genotype involved, whereas genotype × environment interactions... -
Die invloed van planttyd en plantdigtheid op die duurte en tempo van graanvul van mielies (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P. Pretorius --- , Republiek van Suid-Afrika J.J. Human --- Departement Agronomie, Republiek van Suid-AfrikaDie invloed van planttyd en plantdigtheid op die lengte van die graanvulperiode en die graanvultempo van mielies is in veldproewe ondersoek. Plantdigtheid het die periode en tempo van graanvul nie betekenisvol beïnvloed nie. Die graanvulperiode het betekenisvol toegeneem terwyl die... -
The accumulation of nitrate in Kikuyu grass (Pennisetum clandestinum Hochst)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P. Marais --- Biochemistry Section, Republic of South Africa D.L. Figenschou --- Biochemistry Section, Republic of South Africa C. Dennison --- Department of Biochemistry, Republic of South AfricaA study was made of some of the factors responsible for the accumulation of excessive amounts of nitrate in certain Kikuyu pastures. Accumulation, mainly in stem tissue, is the nett result of several contributing processes. Climatic conditions causing a decline... -
South African Journal of Plant and Soil Instructions to Authors
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.S. Hammes --- Department of Plant Production, Republic of South Africa B. Kriel --- Department of Plant Production, Republic of South Africa E.A. Beyers --- Department of Plant Production, Republic of South AfricaSingle maize plants (Zea mays L cv. SNK 2244) were grown in sand culture in polyethylene tubes (300 mm × 110 mm diam.) in a glasshouse. Apparent photosynthetic rate was determined at intervals during the growing period, using a portable... -
Effect of water stress on cane growth and water use of sugar cane
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.G. Inman-Bamber --- , Republic of South Africa J.M. de Jager --- , Republic of South AfricaThe growth and water use of three sugar cane cultivars, NCo376, N12 and N14, were measured under varying degrees of water stress controlled by means of a movable rain shelter. Plots of a first ratoon cane crop were allowed to... -
Invloed van nitraat:ammoniumverhoudings op die ontwikkeling van Zea mays L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F.G. Adriaanse --- , Republiek van Suid-Afrika J.J. Human --- Departement Agronomie en Hortologie, Republiek van Suid-AfrikaDie invloed van drie nitraat:ammoniumverhoudings by twee stikstofkonsentrasies op planteienskappe is met blomtyd en na fisiologiese volwassenheid vir suiwerlyne gemeet. 'n Kwartssandkultuur is as groeimedium in 'n glashuis gebruik. Toenemende NH4 +-verhoudings het planthoogtes, blaaroppervlaktes en droëmateriaalproduksie van verskillende plantkomponente... -
Die relatiewe belang van die vorm en konsentrasie van stikstof in die wortelsone op die ontwikkeling van Zea mays L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F.G. Adriaanse --- , Republiek van Suid-Afrika J.J. Human --- Departement Agronomie en Hortologie, Republiek van Suid-AfrikaDie invloed van ses nitraat:ammoniumverhoudings by 200 mg N l1 in een proef en twee ander verhoudings by 50, 100 en 200 mg N l1 in 'n tweede proef is op droëmateriaalproduksie en stikstofinhoud ondersoek. Die algehele beste behandeling was... -
Effect of time and rate of nitrogen application on the malting quality of barley
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O.T. de Villiers --- Department of Agronomy and Pastures, Republic of South Africa P. C.J. Maree --- Department of Agronomy and Pastures, Republic of South Africa E.W. Laubscher --- Department of Agronomy and Pastures, Republic of South AfricaField trials were conducted to determine the effect of time and rate of single and split applications of nitrogen on various malting parameters of barley. The effect of a single low nitrogen application of 50 kg Nha−1 at sowing was... -
The inheritance of base temperature in grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South AfricaTwo different methods were used to identify the genetic determinants of the base temperatures of sorghum seeds which were germinated at 15°C. These were a factorial mating design and a crossing system to identify lines which contain the greatest number... -
Germination rate of maize (Zea mays L.) kernels. I. Relationships with kernel properties and water uptake
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.A. van de Venter --- , Republic of South Africa Rentia Hoffman --- , Republic of South AfricaRelationships were sought between germination rate and various kernel variables of 12 freshly harvested, undeteriorated seed lots of maize. Germination rate was positively correlated with water content of kernels at all sampling times up to 30 h of incubation and... -
Germination rate of maize (Zea mays L.) kernels. II. Relationships with respiration rate and adenosine triphosphate content
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.A. van de Venter --- , Republic of South Africa Rentia Hoffman --- , Republic of South Africa S. de Meillon --- , Republic of South AfricaGermination rate of freshly harvested, undeteriorated seed lots of maize was found to be positively correlated with rate of oxygen uptake of kernels and adenosine triphosphate (ATP) content of embryos, at 6 and 12 h of incubation. Respiration rate was... -
A vacuum filtration and leaching method for the colorimetric determination of ammonium and nitrate nitrogen in soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. D.P. Botha --- , Republic of South Africa J.C. Johnson --- , Republic of South AfricaThe extracting solution and soil were separated by using vacuum filtration, followed by continuous leaching. The procedure was evaluated by spiking five different topsoil samples (having a wide range of physical and chemical properties) with ammonium nitrate and determining the... -
Reaction of three veld grasses to different schedules of grazing and resting. 2. Residual effects on vigour
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.L. Barnes --- Department of Agriculture and Water Supply, Republic of South AfricaSeven defoliation treatments involving grazing at intervals with sheep until mid-January or mid-March, or for the whole growing season at each of two stocking intensities, or resting for the whole growing season (control treatment) were applied on veld during the... -
Rate of dissolution of gypsum from different sources and its effect on water infiltration of soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H. Frenkel --- Department of Agronomy, Republic of South Africa M.V. Fey --- Department of Agronomy, Republic of South AfricaFive sources of gypsum (pure, mined and three industrial) were pressed into pellets and their dissolution rate when suspended in water compared by measuring electrical conductivity of the stirred solution. Pellets of industrial phosphogypsum from Phalaborwa, Potchefstroom and Richards Bay... -
Voorspelling van nitraatbeweging in 'n fynsandleemgrond gedurende die braakperiode met die Burnsmodel
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E.J. Haumann --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-Afrika'n Eenvoudige model wat deur Burns (1974) ontwikkel is vir die voorspelling van nitraatbeweging in sandtot sandleemgronde is getoets. Verskillende nitraatverspreidingspatrone is in 'n fynsandleemgrond van 1,5-m diepte tot stand gebring waarna water met mikrobesproeiing toegedien is om nitraatbeweging te... -
Kinetika van nitrifikasie in gronde van die sentrale besproeiingsgebiede in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Laubscher --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie verloop van nitrifikasie is in agt gronde, afkomstig van die sentrale besproeiingsgebiede, gemonitor na toediening van (NH4)2SO4 teen die ekwivalent van 100 kg N ha−1 aan beide die bo- en ondergronde. Tydens inkubasie by 30°C is die NH4 +,... -
Bepaling van donkerrespirasie by mielies (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.H. du Preez --- Landboufakulteit, Republiek van Suid-Afrika J.J. Human --- Landboufakulteit, Republiek van Suid-Afrika L.P. de Bruyn --- Landboufakulteit, Republiek van Suid-AfrikaTwee mieliecultivars wat in potte onder glashuistoestande met optimale watervoorsiening gekweek is, is gedurende die agtblaarstadium en stuifmeelstort tot baardverskyning aan stremming onderwerp deur watertoediening te weerhou. Die CO2-uitvloeitempo is op sekere tye gedurende die nagperiode gemonitor. Hierdie waardes het... -
Controlling excessive growth in cotton by multiple applications of low concentrations of mepiquat chloride
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Dippenaar --- , Republic of South Africa C.R. Nolte --- , Republic of South Africa C. Barnard --- , Republic of South AfricaExcessive vegetative growth of cotton occurs under favourable growing conditions and this contributes to yield losses. Low concentrations of mepiquat chloride (1, 1-dimethylpiperidinium chloride) were applied to vigorous, growing cotton by means of two or more sprays at different time... -
The effect of leaf water potential on the carbon-dioxide uptake rate during different growth stages of wheat (Triticum aestivum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Human --- Department of Agronomy, Faculty of Agriculture, Republic of South Africa W.J. Roux --- Department of Agronomy, Faculty of Agriculture, Republic of South Africa L.P. de Bruyn --- Department of Agronomy, Faculty of Agriculture, Republic of South AfricaThe effect of water stress on the CO2 uptake rate was measured at three different growth stages of wheat grown in Mitscherlich pots in a glasshouse experiment. Stress was induced by withholding water until the leaf water potential reached −2... -
A comparison of the utilization of initially-applied labelled ammonium and nitrate nitrogen by wheat grown in a pot experiment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. D.P. Botha --- , Republic of South Africa D.C. Pretorius --- , Republic of South AfricaThe utilization of initially-applied 15N-labelled ammonium and nitrate nitrogen by wheat plants grown in soil was investigated in a pot experiment under controlled growth chamber conditions. The application rate was approximately 140 kg N ha−1) and the treatments consisted of... -
Invloed van omgewingsfaktore en opbergingstydperk op kieming van benfurakarb-behandelde mieliesaad (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.P. Terblanche --- , Republiek van Suid-Afrika H.A. van de Venter --- , Republiek van Suid-AfrikaDie invloed van benfurakarb saadbehandeling op kieming by mieliesaad is onder gunstige en suboptimale temperatuur sowel as na opberging en in waterstrestoestande ondersoek. Konsentrasies van 1 350 en 1 800 g a.b. 100 kg−1 saadmassa en opberging na behandeling lei... -
Evaluating different wheat production strategies for the Orange Free State using stochastic dominance techniques and a crop growth model
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 wheat crop growth model and stochastic dominance techniques were used to evaluate several wheat production strategies for the Orange Free State. Fifty seasonal grain yields and corresponding gross margins were calculated from daily weather data and soil data for... -
The potential effect of environmental conditions on the growth of irrigated cool season pastures in the Dohne Sourveld
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: c. J.G le Roux --- Dohne Agricultural Centre, Republic of South Africa L.G. Howe --- Dohne Agricultural Centre, Republic of South Africa L.P. du Toit --- Dohne Agricultural Centre, Republic of South Africa W. Iveson --- Dohne Agricultural Centre, Republic of South AfricaFour temperate grasses (Festuca arundinaceae, Festuca X Lolium hybrid, Lolium boucheanum and Lolium multiflorum) were grown under irrigation at the Dohne Agricultural Centre. The object was to determine the monthly growth and nutritional value of the grasses. The effects of... -
Antagonistic effect of MCPA on Avena sterilis with tralkoxydim
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B.L. de Villiers --- Small Grain Centre, Republic of South Africa D. du Toit --- , Republic of South AfricaControl of wild oats (Avena sterilis ssp. ludoviciana Nyman) with tralkoxydim {2-[1-(ethoxyimino)propyl]-3- hydroxy-5-(2,4,6-trimethylphenyl) cyclohex-2-enone} in a tank mix with MCPA (2-methyl-4-chloro phenoxy acetic acid) and/or bromoxynil (3,5-dibromo-4-hydroxybenzonitrile-octanoate and heptanoate esters) was determined under controlled conditions. Tralkoxydim alone and combinations with... -
Utilization of initially-applied labelled ammonium nitrate by three successive crops
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. D.P. Botha --- , Republic of South Africa D.C. Pretorius --- , Republic of South Africa J.C. Johnson --- , Republic of South Africa M.V. Kidson --- , Republic of South AfricaThe aim of the study was to compare N uptake from initially-applied NH4 + and NO3- ions and to compile a balance sheet for applied fertilizer N. In a pot experiment, maize, sorghum and sunflower plants were grown in succession,... -
Effek van ureumkonsentrasies op die urease-aktiwiteite in gronde van die sentrale besproeiingsgebiede in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F. P.J. Thormählen --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie oogmerk met die studie was om vas te stel by watter ureumkonsentrasies die urease In die besproeide gronde versadlg of geinhibeer word. Die verloop van hldrolise is In ses gronde met verskillende urease-aktiwi- teite gemonitor na toediening van ureum... -
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... -
Die invloed van verskillende waterregimes op Up-to-date aartappels I. Vegetatiewe ontwikkeling, fotosintesetempo en stomatadiffusieweerstand
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.M. Steyn --- , Republiek van Suid-Afrika H.F. du Plessis --- , Republiek van Suid-Afrika P.F. Nortjé --- , Republiek van Suid-AfrikaDrie grondwaterregimes (20, 50 en 70% onttrekking van plantbeskikbare water) is gedurende herfsaanplan- tings in 1987 en 1988 op Up-to-date aartappels toegepas om die invloed daarvan op groei en ontwikkeling te ondersoek. Twee fisiologiese parameters van plantwaterstremming, naamlik, fotosintesetempo en... -
Die invloed van straling op die groei van mielies (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.M. Hurn --- Departement Plantproduksie, Republiekvan Suid-Afrika P.S. Hammes --- Departement Plantproduksie, Republiekvan Suid-AfrikaAangesien stralingsintensiteit met plek en tyd varieer, is die invloed daarvan op groei en ontwikkeling van mielies in 'n veldproef ondersoek. Drie stralingsintensiteite (100%, 75% en 42% van voile sonlig) en drie plantpopulasies (1.2, 2.7 en 5.5 plante m−2) is... -
The inheritance of seedling growth rate in grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South AfricaThe inheritance of growth rate in grain sorghum seedlings was studied in two factorial crossing systems. The presence of both additive and dominance genetic variation was indicated. The additive gene effects played a greater role. At least three genetic factors... -
The optimal rooting medium for minisetts of potato (Solanum tuberosum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.A. Addae-Kagyah --- Department of Plant Production, Republic of South AfricaThree different rooting media, namely, river sand, sawdust and wood shavings, were used for rooting various sizes of minisetts of potato (Solanum tuberosum L.), uniformly pre-treated with wood ash, indolebutyric acid (IBA), Captan and Lindane. The best substrate was found... -
Effek van residuele plus toegediende stikstof op graanopbrengs van mielies in die Hoëveldstreek
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Bloem --- , Republiek van Suid-Afrika R.O. Barnard --- Departement van Grondkunde en Plantproduksle, Republiek van Suid-AfrikaDie behoefte in Suid-Afrika aan stikstofbemestingsriglyne wat op 'n meer fundamentele basis berus, het aanleiding gegee dat drie veldproewe in die 1992/93 groeiseisoen begin is. Residuele NO3-N is na oes (Julie 1993) en voor plant (November 1993) op dieptes van... -
Can molybdenum reduce pre-harvest sprouting in wheat?
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.T. Modi --- Department of Agronomy, Republic of South Africa A. L.P. Cairns --- Department of Agronomy, Republic of South AfricaThe effect of foliar application of molybdenum (Mo) on grain dormancy was examined in six wheat cultivare at four sites. Application of 100 mg L−1 Mo at flag leaf stage significantly increased grain Mo content at all sites and reduced... -
The yield response of annual ryegrass (Lolium multiflorum) to varying nitrogen fertilizer application strategies
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.J. Eckard --- , Republic of South Africa P.E. Bartholomew --- , Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaAnnual ryegrass (Lolium multiflorum LAM. cv. Midmar) pastures were established on three sites, representing the Avalon, Katspruit and Inanda soil forms, with cut-plot experimentation over a period of four years (1987 - 1990). Nitrogen fertilizer was top-dressed at 0, 200,... -
Fotosintesetempo en stomatadiffusieweerstand van aartappels soos beïnvloed deur waterstremming
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.F. du Plessis --- , Republiek van Suid-Afrika J.M. Steyn --- , Republiek van Suid-AfrikaDie invloed van waterstremming in aartappelplante op netto fotosintesetempo en stomatadiffusieweerstand is tydens 'n herfsaanplanting ondersoek. Watertoediening is op 14, 28 en 42 dae na opkom gestaak om sodoende verskillende waterstremmingsperiodes tydens die groeiseisoen toe te pas. Hierdie Studie is... -
Evaluation of an undisturbed-soil incubation method as an index of soil nitrogen availability in a limed and non-limed soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Raath --- , Republic of South Africa D. Saayman --- Department of Soil and Agricultural Water Science, Republic of South AfricaNitrogen mineralization potentials were determined using an undisturbed-soil incubation procedure. The purpose of this study was to evaluate the above-mentioned method as an index of soil nitrogen availability. Undisturbed soil samples (0–150 and 150–300 mm) of a limed (pH 7.3)... -
Response of maize to ammonium nitrate, urea and cogranulated urea-urea phosphate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O.A. Yerokun --- Department of Soil Science, ZambiaUrea fertilizers may lose N by ammonia volatilization when applied in the field. In order to reduce this loss, modified urea compounds are being used. Not all of them reduce ammonia loss and improve crop yields. A field study was... -
Ammonia volatilization from ammonium nitrate, urea and urea phosphate fertilizers applied to alkaline soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O.A. Yerokun --- Department of Soil Science, ZambiaThe volatilization of ammonia following applications of urea fertilizers to soils may release significant amounts of N into the atmosphere and reduce the plant available N. This study compared ammonia loss from urea phosphate (170 g N kg−1, 190 g... -
A technique to evaluate ENSO-based maize production strategies
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Singels --- Department of Agrometeorology, South Africa A.B. Potgieter --- Free State Department of Agriculture and Environmental Affairs, South AfricaDrought occurs frequently in southern Africa, which causes harm to crop production and food security. Atmospheric and oceanic phenomena such as EL Niño/Southern Oscilation (ENSO) may be used to forecast drought. Crop production strategies could then be adapted to mitigate... -
Development of integrated control strategies for wattle. 1. Utilization of wattle, control of stumps and rehabilitation with pastures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Campbell --- Cedara Weeds Laboratory, Republic of South Africa R.L. Kluge --- Cedara Weeds Laboratory, Republic of South AfricaTwo integrated control strategies were developed for areas where wattle infestations could be utilized. Costing analyses were determined for initial control and four follow-up control operations using chemical control and fire. Efficacy of all treatments was high. Costs were significantly... -
Development of integrated control strategies for wattle. II. Control of unwanted wattle
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Campbell --- Cedara Weeds Laboratory, Republic of South Africa D.C. Naudé --- Cedara Weeds Laboratory, Republic of South Africa R.L. Kluge --- Cedara Weeds Laboratory, Republic of South AfricaFour integrated control strategies were developed for wattle that could not be removed for utilization. In the first two strategies, a combination of mechanical and/or chemical control methods either reduced the wood biomass in situ (fell, stack and burn) or... -
A critical soil sulphur level for maize (Zea mays L.) grown in a glasshouse
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. Grobler --- Department of Plant and Soil Science, Republic of South Africa A.A. Bloem --- Department of Agriculture North West Province, Republic of South Africa A.S. Claassens --- Department of Plant Production and Soil Science, Republic of South AfricaSulphur is an essential nutrient for the production of the amino acids cysteine and methionine, which are important for protein syntheses. Previous studies showed that sulphur deficiencies are becoming common because of the tendency to use more concentrated and liquid... -
Seasonal variations in carbohydrate content of Carica papaya plants
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. Allan --- Horticultural Science, Republic of South AfricaMonthly samples were collected of roots, stems, petioles and leaf blades of clonal female ‘Honey Gold’ papaw (Carica papaya L.) plants, in the cool subtropical Pietermaritzburg area, to study any seasonal variations in carbohydrate content of this tropical plant which... -
Effect of seeding date on the performance of grasses and broadleaf species evaluated for cover crop management in two wine grape regions of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.C. Fourie --- , Republic of South Africa P. J.E. Louw --- , Republic of South Africa G.A. Agenbag --- Department of Agronomy, Republic of South AfricaA selection of species suitable for cover crop management in the different wine grape regions is required to enable more producers to apply this environment friendly practice in a sustainable manner as part of an integrated production strategy. The effect... -
Evaluation of petiole nitrate measurement as an aid for N fertilization of potatoes (Solanum tuberosum L.) on sandy soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.P. Brink --- Department of Agronomy and Pastures, N. J.J. Combrink --- Department of Agronomy and Pastures, F.H. Knight --- Department of Agriculture, Western Cape,Potatoes are produced in the Sandveld of the Western Cape on soils with extremely low clay and organic material contents. A low nitrogen mineralisation potential and high leaching hazard complicate the management of the nitrogen supply to the plant. This... -
An evaluation of two collections of South African maize (Zea mays L.) germ plasm: 2. The genetic basis of dry-down rate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B. de Jager --- Department of Genetics, C.Z. Roux --- Department of Genetics, H.C. Kühn --- ,Dry-down rate is the loss of moisture from maize kernels over time. This study was undertaken to determine whether collections of early and late flowering South African germ plasm have the same genetic properties with reference to dry-down rate as... -
Effect of soil tillage, crop rotation and nitrogen application rates on plant-N content of spring wheat (Triticum aestivum L.) in the Swartland wheat-producing area of the Republic of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.H. Maali --- Department of Agronomy, Republic of South Africa G.A. Agenbag --- Department of Agronomy, Republic of South AfricaStudies on nitrogen content in spring wheat were conducted during the 2000 and 2001 growing seasons as part of a long-term tillage and crop rotation trial. Four tillage methods were used, namely conventional tillage (CT), tine tillage (TT), minimum tillage... -
Potassium nitrate and urea sprays affect flowering and yields of ‘Tommy Atkins’ (Mangifera indica) mango in Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. Yeshitela --- Department of Plant Production and Soil Sciences, South Africa P.J. Robbertse --- Department of Plant Production and Soil Sciences, South Africa P. J.C. Stassen --- Department of Horticulture, South AfricaThe effects of leaf applications of potassium nitrate (KNO3), alone and in combination with urea at different concentrations on flowering, fruit set and fruit quality of Tommy Atkins' mango grown in the rift valley of Ethiopia were evaluated. The trees... -
Pine litter as substrate for propagation of vegetable transplants in trays
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.S. Mphaphuli --- Centre of Organic and Smallholder Agriculture, Department of Crop Sciences, South Africa W. van Averbeke --- Centre of Organic and Smallholder Agriculture, Department of Crop Sciences, South Africa R. Böhringer --- Centre of Organic and Smallholder Agriculture, Department of Crop Sciences, South AfricaThe study evaluates the potential of pine litter for use as a substrate in the propagation of vegetable transplants in trays. Sub-optimum pH and electrical conductivity of pine litter were addressed by incorporating 10% feedlot manure by volume. The water... -
Effect of soil tillage, crop rotation and nitrogen application rates on bread-baking quality of spring wheat (Triticum aestivum L.) in the Swartland wheat producing area of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.H. Maali --- Department of Agronomy, Republic of South Africa G.A. Agenbag --- Department of Agronomy, Republic of South AfricaSpring wheat (Triticum aestivum L.) is produced in the wheat producing areas of the Western Cape Province, Republic of South Africa, primarily for bread-baking purposes. Milling and baking characteristics are therefore of utmost importance. In a long-term tillage and crop... -
The effects of strategic nitrogen fertiliser application during the cool season on perennial ryegrass-white clover pastures in the Western Cape Province 1. Soil nitrogen dynamics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Labuschagne --- , South Africa M.B. Hardy --- Department of Agriculture Western Cape, South Africa G.A. Agenbag --- , South AfricaThe dynamics of soil inorganic-N in reaction to a single, strategic application of fertiliser N were studied during the period 2000 to 2002 in an Oakleaf soil with a clay content increasing from 10 to 30.8% with depth. Soil inorganic-N... -
The effects of strategic nitrogen fertiliser application during the cool season on perennial ryegrass-white clover pastures in the Western Cape Province 2. Dry matter production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Labuschagne --- , South Africa M.B. Hardy --- Department of Agriculture Western Cape, South Africa G.A. Agenbag --- , South AfricaThe response of an irrigated perennial ryegrass-white clover pasture to fertiliser nitrogen application rates of 0, 50, 100 and 150 kg N ha−1 applied in either autumn, early winter, late winter, early spring or late spring was investigated over a... -
The effects of strategic nitrogen fertiliser application during the cool season on perennial ryegrass-white clover pastures in the Western Cape Province 3. Clover content
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Labuschagne --- , South Africa M.B. Hardy --- Department of Agriculture Western Cape, South Africa G.A. Agenbag --- , South AfricaThe influence of a single application of fertiliser N (0, 50, 100 and 150 kg N ha−1) applied in either autumn, early winter, late winter, early spring or late spring on the grass-clover balance in a perennial ryegrass-white clover pasture... -
The effect of hydroxide solutions on the structural stability and saturated hydraulic conductivity of four tropical soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Nyamangara --- Department of Soil Science and Agricultural Engineering, Zimbabwe S. Munotengwa --- Department of Soil Science and Agricultural Engineering, Zimbabwe P. Nyamugafata --- Department of Soil Science and Agricultural Engineering, Zimbabwe G. Nyamadzawo --- Department of Soil Science and Agricultural Engineering, ZimbabweIndustrial and domestic effluents are widely applied to soil as a way of dumping, and/or source of nutrients and water for plant growth. The potential effects of sodium hydroxide (NaOH) and potassium hydroxide (KOH), which are common hydroxides found in... -
Water and nutrient retention by Aquasoil® and Stockosorb® polymers
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.G. Ghebru --- Department of Plant Production and Soil SCience, South Africa E.S. du Toit --- Department of Plant Production and Soil SCience, South Africa J.M. Steyn --- Department of Plant Production and Soil SCience, South AfricaWater retention and hydration rate of Aquasoil and Stockosorb polymers, the effects of these polymers on the water, ammonium and nitrate retention of a pine bark growth medium and the response of the polymers to fertilizer solutions were investigated. Aquasoil... -
Effect of chemical seed treatment, seeding rate and row width on plant populations and yield of canola (Brassica napus var. oleifera)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.J. De Villiers --- Department of Agronomy, South Africa G.A. Agenbag --- Department of Agronomy, South AfricaField experiments were conducted in 2003 and 2004 at Roodebloem, representing the Rûens, in the canola production area of the Western Cape Province to determine the influence of seeding rate, row width and chemical seed treatment on the plant density... -
The effects of N-source, shading and root zone cooling on two Disa hybrids
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D. Pienaar --- Department of Agronomy, Republic of South Africa N. J.J. Combrink --- Department of Agronomy, Republic of South AfricaAlthough the Disa genus contains more than 130 species, the most commonly grown is Disa unifiora and its hybrids. The evergreen Disas are indigenous to South Africa and have great potential for marketing as cut flowers or pot plants but... -
Response of Lachenalia growing in soil to nitrogen fertilization during the nursery phase
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.M. Engelbrecht --- Department of Soil, South Africa C.C. du Preez --- Department of Soil, South Africa J.J. Spies --- Departement of Plant Sciences, South AfricaDuring the nursery phase, Lachenalia flower bulb producers plant bulblets propagated from leaf cuttings, for enlargement. They strive for a high yield of good quality bulbs that are of a marketable size within a year. In this regard nitrogen is... -
Predicting seedling emergence of cabbage and onion using vigour tests
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.K. Fessehazion --- Department of Plant Production and Soil Science, South Africa D. Marais --- Department of Plant Production and Soil Science, South Africa P.J. Robbertse --- Department of Plant Production and Soil Science, South AfricaPredicting seedling emergence using standard and non-standard germination temperatures, standard accelerated ageing (AA) and saturated salt accelerated ageing (SSAA) tests, were investigated. Germinations were performed at temperatures of 10°, 20°, 20°/30° and 30°C for cabbage (Brassica oleracea var. capitata L.)... -
Long-term kinetics of phosphate desorption from soil and its relationship with plant growth
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.M. Taddesse --- , Republic of South Africa A.S. Claassens --- , Republic of South Africa P.C. de Jager --- , Republic of South AfricaKnowledge on the availability of residual P in soils is of great importance for fertilization management. The use of dialysis membrane tubes filled with hydrous ferric oxide solution has recently been reported as an effective way to characterize P desorption... -
Investigating the use of satellite selection sites in soybean (Glycine max (L.) Merr.) breeding
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.A. Jarvie --- , South Africa P.E. Shanahan --- , South AfricaA satellite selection site is a decentralized selection environment that could be employed to expand the influence of existing breeding programmes to additional target environments. This study was designed to establish whether it would be possible to achieve site-specific adaptation... -
Bio-stimulatory properties in seeds of plants from the families Caryophyllaceae and Fabaceae with application potential in agriculture
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.C. Pretorius --- , South Africa A. Du Plessis --- , South Africa E. van der Watt --- , South AfricaA comparative investigation into the bio-stimulatory activity of seed suspensions from two South African plant species belonging to each of the families Caryophyllaceae and Fabaceae were conducted using ComCat®, a commercially available bio-stimulant, as a positive control. These included Acacia... -
Physiological traits associated with drought tolerance in bread wheat (Triticum aestivum L.) under tropical conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.K. Kimurto --- Department of Crop and Soil Sciences, Kenya J.B.O. Ogola --- Department of Plant Production, South Africa M.G. Kinyua --- Department of Crop Science and Biotechnology, Kenya J.M. Macharia --- Department of Botany, Kenya P.N. Njau --- , KenyaAlthough it is generally accepted that drought tolerance is a critical agronomic trait, efficient and predictable improvement in drought tolerance in bread wheat (Triticum aestivum L.), in varying drought stress conditions, has not been fully achieved. This study aimed at... -
Morpho-physiological response of durum wheat genotypes to drought stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.F. Solomon --- Department of Plant Sciences, South Africa M.T. Labuschagne --- Department of Plant Sciences, South AfricaThe impact of moisture stress on phenology and growth varies for genotypes and the growth stages at which stress is encountered. The aim of this study was to determine the effect of moisture stress on some morpho-physiological traits of durum... -
Soil compaction under sugar cane (Saccharum hybrid sp.) cropping and mechanization in Mauritius
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.R. Ng Cheong --- , Mauritius K.F. Ng Kee Kwong --- , Mauritius C.C. Du Preez --- Department of Soil, Crop and Climate Sciences, South AfricaFarm machinery is increasingly used in sugar cane production in Mauritius and is expected to cause soil compaction. A study was undertaken to ascertain whether the five major cane-growing soil groups of Mauritius were being compacted as a result of... -
Assessing the potential soil acidification risk under dryland agriculture in the Mlondozi district in the Mpumalanga Province of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.G. Jansen van Rensburg --- Department of Plant Production and Soil Science, South Africa A.S. Claassens --- Department of Plant Production and Soil Science, South Africa D.J. Beukes --- , South Africa H.L. Weepener --- , South Africa P.J. Beukes --- , South AfricaThe farming community in the Mlondozi district in the Mpumalanga Province of South Africa has been part of a government liming intervention with the objective to ameliorate the serious soil acidity problem in the district. The current study was undertaken... -
Herbicide resistance in weeds – a threat to effective chemical weed control in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Pieterse --- Department of Agronomy,Apart from the last 40 to 50 years, weed control in crops has always been a labour-intensive and time-consuming mechanical practice. Relief came in the form of chemical compounds that could control weeds, in particular selective herbicides. The development of... -
Response of Lachenalia growing in soil to interactions between nitrogen and phosphorus fertilisation in the nursery phase
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.M. Engelbrecht --- Department of Soil, South Africa C.C. du Preez --- Department of Soil, South Africa J.J. Spies --- Department of Plant Sciences, South AfricaThe interactions between nutrients required by plants play an important role in sustainable crop production. Both nitrogen and phosphorus are involved in a number of important functions in the plant such as carbohydrate and protein formation. The need to investigate... -
Effect of nitrogen levels and sources on production of Swiss Chard (Beta vulgaris var. Cicla)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.M. Engelbrecht --- Department of Soil, Crop and Climate Sciences, South Africa G.M. Ceronio --- Department of Soil, Crop and Climate Sciences, South Africa P.C. Motseki --- Department of Soil, Crop and Climate Sciences, South AfricaTo optimise the production of Swiss chard, high levels of nitrogen fertiliser are often applied. This may have adverse effects on both the economy of fertilisation and the nutritional value of the human diet. Very little is known about both... -
Seasonal and varietal effects on tiller population development of sugarcane (Saccharum Officinarum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Zhou --- , M.D. Shoko --- , ZimbabweTillers carry leaves, determine leaf area index and indirectly influence the amount of photosynthetically active radiation (PAR) intercepted by the sugarcane canopy. Tillers develop into stalks, the sink for the products of photosynthesis. The objective of this study was to... -
Effect of tillage systems and nitrogen application rates on selected physical and biological properties of a clay loam soil in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: TS Taylor --- Soil Science, School of Environmental Sciences, South Africa LW Titshall --- Soil Science, School of Environmental Sciences, South Africa JC Hughes --- Soil Science, School of Environmental Sciences, South Africa GR Thibaud --- Soil and Analytical Services Division, Department of Agriculture, South AfricaThe effects of agricultural management practices on soil physical and biological parameters provide fundamental information for assessing sustainability. Tillage (annual conventional tillage and no-till) and nitrogen fertiliser (limestone ammonium nitrate at rates of 0, 100 and 200 kg N ha−1)... -
Winter cover crops effects on soil strength, infiltration and water retention in a sandy loam Oakleaf soil in Eastern Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: HA Mupambwa --- Department of Agronomy, South Africa IIC Wakindiki --- Department of Agronomy, South AfricaThere is substantial evidence that cover crops increase soil fertility and plant nutrition but the few studies concerning soil physical properties are conflicting. This study determined the effects of monocultures of vetch (Vicia dasycarpa L.), lupin (Lupinus angustifolius L.), oats... -
The function of regreening in yellow female Leucadendron (Proteaceae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael Schmeisser --- Department of Horticultural Science, South Africa Gerard J Jacobs --- Department of Horticultural Science, South Africa Willem J Steyn --- Department of Horticultural Science, South AfricaWhat do female Leucadendron stand to gain by regreening their involucral leaves rather than discarding them after flowering? Regreening of involucral leaves could contribute to the carbon budget and/or protect the developing cone-shaped inflorescence during seed development. This was determined... -
Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 2. Tree performance and root distribution
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: John Wooldridge --- Soil and Water Science, South Africa Johan Fourie --- Soil and Water Science, South Africa Marlise E Joubert --- Soil and Water Science, South AfricaEffects of integrated production (IP) and organic-acceptable soil surface management practices were investigated in a ‘Cripps Pink’/M7 apple orchard in the Elgin area, South Africa. Work row treatments included cover crops, weeds and straw mulch. In the IP tree rows,... -
Chickpea residue properties controlling decomposition dynamics and nitrogen availability in some tropical acid soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Benjamin O Danga --- Department of Agricultural Resource Management, Kenya Aviva Hadas --- Department of Soil Chemistry and Plant Nutrition, Israel Isaiah IC Wakindiki --- Department of Agronomy, South Africa Josephine P Ouma --- Department of Crops, Horticulture and Soils, Kenya Asher Bar-Tal --- Department of Soil Chemistry and Plant Nutrition, IsraelChickpea (Cicer arietinum) grown in a rotation can contribute significant nitrogen (N) if its decomposition and nutrient-release dynamics are known and synchronised with the maximum demand by the succeeding crop. The aims of the study were to investigate the decomposition... -
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... -
A vetch winter cover crop can improve response to nitrogen fertiliser and profitability of no-till maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Ernest Dube --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Cornelius Chiduza --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Pardon Muchaonyerwa --- School of Agricultural, Earth and Environmental Sciences, South AfricaA high nitrogen (N) fertiliser requirement can be a deterrent to the adoption of conservation agriculture (CA). A field trial was carried out to test whether a high biomass-yielding vetch (Vicia dasycarpa L.) winter cover crop can be used to... -
PRELIMINARY RESULTS ON THE UPTAKE AND RELEASE OF 32P BY POTAMOGETON PECTINATUS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.H. Swanepoel --- , South Africa J.F. Vermaak --- , South AfricaThe absorption and release of 32PO4, by Potamogeton pectinatus L during winter was investigated using a partitioned container in which the roots were separated from the stems and leaves. 32PO4 is absorbed by the roots as well as the stems... -
THE INVERTEBRATE FAUNA AND BIOTIC INDEX VALUE OF WATER QUALITY OF THE GREAT BERG RIVER, WESTERN CAPE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: A. Coetzer --- , South AfricaThe invertebrate fauna was sampled at seven localities in the main stream of the Berg River in 1974. These results are discussed and compared with those of Harrison and Elsworth (1958). The results obtained were also used in applying the... -
RATE OF EROSION IN THE CATCHMENT OF THE BULBERGFONTEIN DAM NEAR REDDERSBURG IN THE ORANGE FREE STATE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.S. Ie Roux --- Department of Geography, South Africa Z.N. Roos --- Department of Geography, South AfricaThe volume of sediment in the Bulbergfontein Dam was computed after mapping the area of the dam and ascertaining the depth of the sediment by digging and augering. The watershed of the impoundment had been delimited by means of aerial... -
AN EXPERIMENTAL EVALUATION OF THE INFLUENCE OF TEMPERATURE ON THE NATURAL RATE OF INCREASE OF DAPHNIA PULEX DE GEER
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.G. van As --- Department of Zoology, South Africa C. Comhrinck --- Department of Zoology, South Africa A.J. Reinecke --- Department of Zoology, South AfricaCohorts of Daphnia pulex from Boskop Dam, an irrigation reservoir near Potchefstroom, Transvaal, were kept at natural food levels under constant temperatures of 10, 15 and 20°C as well as under conditions of temperature with a diurnal fluctuation varying between... -
POSSIBLE ADAPTIVE SIGNIFICANCE OF SEX RATIO AND SEXUAL DIFFERENCES IN SIZE AT MATURITY IN THE ORANGE RIVER LABEO, LABEO CAPENSIS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: I.G. Gaigher --- Department of Nature and Environmental Conservation, South Africa K. C.D. Hannnan --- Department of Nature and Environmental Conservation, South Africa S.C. Thorne --- Department of Nature and Environmental Conservation, South AfricaLabeo capensis spawns on inundated vegetation during flood periods. Suitable conditions for spawning are of short duration and do not allow time for extended breeding behaviour. The success of fertilisation is therefore probably independent of the size of males. This... -
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... -
LEAF AREA AS A MEASURE OF STANDING CROP OF FLOATING AQUATIC MACROPHYTES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P.C. Keulder --- Department of Botany, South AfricaLeaf area is evaluated as a measure of standing crop of Salvinia molesta Mitchell and Azolla filiculoides Lam. cultures under controlled conditions. Growth rates as derived from leaf area determinations agreed with pigment extractions and fresh and dry weight measures... -
STUDIES ON THE ZOOBENTHOS OF SOME SOUTHERN CAPE COASTAL LAKES. SPATIAL AND TEMPORAL CHANGES IN THE BENTHOS OF SWARTVLEI, SOUTH AFRICA, IN RELATION TO CHANGES IN THE SUBMERGED LITTORAL MACROPHYTE COMMUNITY
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.R. Davies --- , South AfricaMajor changes in the benthic macro-invertebrate community of the littoral zone of Swartvlei, South Africa, took place between January and April 1978, and the equivalent months of 1980. These changes, which were associated with a collapse of the submerged littoral... -
A TAXONOMIC STUDY OF SESSILE PERITRICHIANS OF A SMALL IMPOUNDMENT WITH NOTES ON THEIR SUBSTRATE PREFERENCES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Sophié Viljoen --- Research Unit for Fish Biology, South Africa J.G. van As --- Research Unit for Fish Biology, South AfricaA taxonomic study of the sessile peritrichians (Ciliophora: Peritricha) was carried out on material collected from plants and animals, as well as inanimate substrates, experimentally placed into West-dene Dam, Johannesburg. A total of 15 species, representing the genera Carchesiwn, Voorticella,... -
TOXIC CONCENTRATION OF FREE AMMONIA TO BRACHIONUS CALYCIFLORUS PALLAS, A ROTIFER PEST SPECIES FOUND IN HIGH RATE ALGAL PONDS (HRAP's)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: IreneJ. de Moor --- National Institute for Water Research, Republic of South AfricaLaboratory tests on Brachionus calyciflorus Pallas indicate that at low concentrations of free ammonia (< 7 mg l −1) pH levels up to 9,85 could be tolerated for 96 h without apparent ill effect. Free ammonia concentrations > 14,4 mg... -
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... -
THE EFFECTS OF DESIGN AND OPERATION ON THE EFFICIENCY OF HOSEPIPES AS WATER COLUMN SAMPLERS FOR PHYTOPLANKTON
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Tamar Zohary --- , South Africa P.J. Ashton --- , South AfricaThe efficiency of 5 different hosepipe samplers in providing representative water column samples was tested by comparing the chlorophyll a concentrations in these samples with those obtained by integrating discrete depth samples collected with a Van Dorn sampler, in two... -
A NOTE ON TRIOPS GRANARIVS (LUCAS), LYNCEUS TRUNCATUS BARNARD AND STREPTOCEPHALUS CAFER (LOVéN) (BRANCHIOPODA: CRUSTACEA) FROM UMFOLOZI GAME RESERVE, NATAL, SOUTH AFRICA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: NancyA. Rayner --- Department of Zoology, South Africa A.E. Bowland --- Department of Zoology, South AfricaThree species of branchiopod (phyllopod) Crustacea were collected from an ephemeral pool in Umfolozi Game Reserve in December 1983 and 1984. There is no published record of the occurrence of Triope granarius (Lucas) and Lynceus truncatus Barnard in Natal. Streptocephalus... -
A PRELIMINARY STUDY OF ASPECTS OF THE ECOLOGY OF A RARE MINNOW BARBUS TREURENSIS GROENEWALD, 1958 (PISCES: CYPRINIDAE) FROM THE EASTERN TRANSVAAL, SOUTH AFRICA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: C.J. Kleynhans --- Transvaal Nature Conservation Division, South AfricaThe habitat preferences, food habits, reproduction, age and population size of Barbus treurensis were investigated as part of a survey of the threatened fish of the Transvaal. Barbus treurensis occurs only in an isolated section of the Blyde River tributary... -
THE JOURNAL OF THE LIMNOLOGICAL SOCIETY OF SOUTHERN AFRICA: APPRAISAL, ANALYSIS, APPROACH AND APPLICATION
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.A. Thornton --- City Planner's Department, South AfricaIn accordance with the Silver Jubilee theme of ‘reminisce and assess’, the editorial takes a critical look at the Journal of the Limnological Society of Southern Africa with the objective of examining its raison d'etre. After briefly examining the need... -
INTER- AND INTRA-SPECIFIC ASSOCIATIONS AS SOME POSSIBLE PREDATOR AVOIDANCE AND ENERGY CONSERVATION STRATEGIES IN PLANKTONIC ROTIFERS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J. Heeg --- Department of Zoology & Entomology, South Africa NancyA. Rayner --- Department of Zoology & Entomology, South AfricaDuring routine analysis of zooplankton samples from Lake Midmar, a warm temperate impoundment, several associations involving rotifer species were observed. These included: 1) the linking together of individuals of Hexarthra mira and Trichocerca chattoni to form chains; 2) phoretic associations... -
DISTRIBUTION AND ABUNDANCE OF THE BENTHOS IN THE SEDIMENTS OF LAKE CUBHU: A FRESHWATER COASTAL LAKE IN ZULULAND SOUTH AFRICA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.P. Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South Africa T.J. Martin --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaA preliminary investigation of the macrobenthic invertebrates of the sediments of Lake Cubhu, a freshwater coastal lake near Richards Bay was conducted on a quarterly basis during 1987. The most important factor which determined the abundance and distribution of each... -
Aerial and Aquatic Respiration in the River Crab Potamonautes Warreni Calman with Notes on Gill Structure
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: W.J. van Aardt --- Department of Zoology, South AfricaThe oxygen consumption rate (ṀO2) for Potamonauteus warreni Calman (= Potamon warreni (Calman) kept in 25 °C water was 34,4 μmol 1−1 O2 kg−1 and after 72 hours in 98% R.H. air the rate was 31,9 μmol 1−1 O2 kg−1... -
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... -
CONSERVATION IN THE MARINE ENVIRONMENT: SOME PROBLEMS WITH THE MANAGEMENT OF SHORE-ANGLING IN THE SOUTHWESTERN CAPE
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: B.A. Bennett --- Zoology Department, South AfricaRecreational shore angling is a very important sector of South Africa's diverse marine fisheries. The number of anglers participating in this sport is increasing at 6% per annum and currently stands at approximately 380 000. This number is expected to... -
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... -
AN HOLISTIC APPROACH TO THE MANAGEMENT OF WATER QUALITY IN FALSE BAY, CAPE TOWN, SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: A. J.R. Quick --- Town Planning Branch, Cape Town City Council, South AfricaAn overview of the water quality status of False Bay identified the bacterial/viral water quality of stormwater and rivers discharging near contact recreation beaches to be the management concern of highest priority. A second water quality concern is the potential... -
THE PROCESSING OF UNCONFINED, NATURALLY ENTRAINED LEAVES IN TWO LOW-ORDER SOUTHERN AFRICAN MOUNTAIN STREAMS
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: S.J. Lamberth --- Zoology Department, South Africa B.A. Stewart --- , South Africa B.R. Davies --- Zoology Department, South AfricaBreakdown of unconfined and confined leaves of the riparian tree Brabejum stellatifolium L. was investigated in two low order mountain streams (Window Stream and Langrivier) in the southwestern Cape, South Africa. At both sites, 5000 unconfined leaves were released in... -
THE USE OF TOXICITY TESTING IN EFFLUENT REGULATION AND CONTROL: A NEW DIMENSION TO ASSESSMENT AND MANAGEMENT OF WATER QUALITY IN SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: D.J. Roux --- , South AfricaEfficient management tools are continually required to cope with increasing demands placed on the quality and quantity of aquatic resources. Recent developments in environmental monitoring indicate the importance of incorporating biological indicators in assessment programmes. Aquatic toxicology has consequently become... -
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... -
INVERTEBRATES IN THE ORANGE RIVER, WITH EMPHASIS ON CONSERVATION AND MANAGEMENT
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R.W. Palmer --- Department of Water Affairs and Forestry, South AfricaDistribution and abundance of aquatic invertebrates in the lower 1800 kilometres of the Orange River is examined in relation to the conservation and management of the Orange River. Data are based on published information and surveys conducted during research into... -
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... -
THE EFFECT OF SEASON ON A BIOTIC WATER QUALITY INDEX: A CASE STUDY OF THE YELLOW JACKET AND MAZOWE RIVERS, ZIMBABWE.
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: B. Gratwicke --- , , ZimbabweThe effect of season on the South African Scoring System (SASS) biotic index for rapid assessment of water quality using benthic macroinvertebrates was investigated using the Yellow Jacket and Mazowe Rivers in Zimbabwe as a case study. Several impacts in... -
Impacts of non-selective grazing on cover, composition, and productivity of Nama-karoo grassy shrubland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C. Beukes R.M. CowlingThe non-selective rotational grazing system has undergone a long and controversial development. The merits of this grazing system, where relatively large numbers of livestock are herded into numerous small paddocks for short timespans with long rests between grazings, have not... -
Effects of selective defoliation and height of defoliation on tiller dynamics and herbage yield of Themeda triandra in a semi-arid rangeland in Zimbabwe
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S. Dube V.E.E. GwarazimbaUnderstanding the impacts of intensity and selection of grazing on the performance of grasses is important in the management of grazing areas. It is especially important in semi-arid environments where, apart from moisture, the levels at which grasses are utilized... -
The effect of prolonged heavy grazing pressure on the regrowth of two perennial grass species in a semi-arid communal rangeland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: W Twine V Gray N Owen-SmithWe tested the hypothesis that initial above-ground regrowth of defoliated grass tufts would be reduced in sites which have been exposed to prolonged heavy grazing. The regrowth of Themeda triandra and Urochloa mosambicensis tufts was compared between three heavily grazed... -
The response of wild oats (Avena fatua L.) to sowing rate and herbicide application
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MA Turk AM Tawaha NH SamarahA 2-year field study was conducted during the rainy seasons of 1999 and 2000 at Houfa in northern Jordan, to study the influence of various sowing rates (20kg ha-1, 40kg ha-1 and 60kg ha-1) and 2,4-D application at two growth... -
Kudu foraging behaviour: influenced by animal density?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C van der WaalIn deciduous savanna a marked decline in browse availability characterises the late dry season and apparently regulates populations of large browser species such as kudu. The dry season utilisation patterns of two woody species, Acacia tortilis and Boscia albitrunca, in... -
Physical and chemical treatments for enhancing seed germination of Oldman saltbush (Atriplex nummularia)
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MMW Abu-Zanat N SamarahThis study was conducted to improve the seed germination of Oldman saltbush (Atriplex nummularia), which is an important fodder shrub commonly used for revegetation of degraded rangelands in the West Asia and North Africa regions. Seeds with and without their... -
Effect of three grazing intensities on selected soil properties in semi‐arid west Texas
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: E.M. Seitlheko --- Department of Agronomy, United States of America B.L. Allen --- Department of Agronomy, United States of America D.B. Wester --- Department of Agronomy, United States of AmericaSoils in the study, carried out in the Texas Trans‐Pecos region, were fine‐loamy, mixed, thermic Aridic Calciustolls; fine‐loamy, mixed, thermic Aridic Ustochrepts; and fine, mixed, thermic Typic Chromusterts. Our primary objective was to determine the effect of three grazing intensities... -
The effect of defoliation and competition on the regrowth of Themeda triandra and Aristida junciformis subsp. junciformis
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C.D. Morris --- Agricultural Research Council, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaThe effects of a cutting trial, conducted to study the combined influence of defoliation and competition from surrounding vegetation on the vigour of Themeda triandra and Aristida junciformis, were evident after the single season of treatment implementation. Aristida junciformis was... -
Factors affecting the voluntary feed intake of sheep grazing Pennisetum clandestinum (kikuyu) pastures: Observations from forage analysis
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.P. Henaar --- Agricultural Research Council, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa J.B.J. van Ryssen --- Department of Animal & Poultry Science, Republic of South AfricaSheep were used in two investigations to study factors which could limit voluntary intake of Pennisetum clandestinum (kikuyu) pasture. Possible reasons for the low intakes were found in the high soluble nitrogen and nitrate content of the pasture, its high... -
Perspective: Improvement in rangeland condition of the Flooding Pampa of Argentina through controlled grazing
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: V.A. Deregibus --- Faculty of Agronomy, Argentina E. Jacobo --- Faculty of Agronomy, Argentina A. Rodriguez --- Faculty of Agronomy, ArgentinaThe Flooding Pampa grasslands situated in temperate Argentina were ungrazed historically, but now support primarily breeding herds of cattle. These extensive, flat, infertile grasslands experience seasonal floods. Although summer droughts are usual, grasses maintain productivity during the entire year and... -
The effects of mixed‐species grazing on the performance of cattle and sheep in Highland Sourveld
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M.B. Hardy --- , Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaThe performance of cattle and sheep in relation to cattle‐to‐sheep ratio was measured over four grazing seasons. Rainfall for the first three grazing seasons was similar to the long‐term mean of 790 mm whilst 1992/1993 was a relatively low rainfall... -
Investigation of the potential ingestion rates of different sourveld grasses by cattle and sheep
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.J. O'Reagain --- , Republic of South Africa B.C. Goetsch --- , Republic of South AfricaQuantification of the potential ingestion rates of different grasses is important for modelling purposes but is difficult to achieve under field conditions. The ingestion rates of the sourveld species Alloteropsis semialata, Andropogon appendiculatus, Cynodon dactylon, Eragrostis plana, Heteropogon contortus, Hyparrhenia... -
Towards the development of a bioeconomic stocking model for the semi‐arid savanna of KwaZulu‐Natal
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G.P. Hatch --- Department of Grassland Science, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa G.F. Ortmann --- Department of Agricultural Economics, South AfricaRainfall variability is a major determinant of system dynamics and profitability of livestock enterprises in arid and semi‐arid environments. Range managers consequently require detailed information on the financial and ecological implications of various stocking strategies in order to formulate viable... -
Predicting animal production on sourveld: A species‐based approach
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.J. O'Reagain --- , Republic of South AfricaA simulation model was developed to predict average daily gain (ADG) in cattle and sheep grazing different species and swards of different species composition on Dohne Sourveld. The model was based upon measured ingestive and digestive characteristics of different grass... -
Responses to sheep browsing at different stocking rates: Water relations, photosynthesis and carbon allocation in two semi‐arid shrubs
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: F. van der Heyden --- ARC ‐ Range and Forage Institute, c/o Department of Botany, Republic of South Africa F. Roux --- , Republic of South Africa C.N. Cupido --- Department of Plant Sciences, Republic of South Africa M.W.P. Leeuw --- Department of Plant Sciences, Republic of South Africa N. Malo --- Department of Plant Sciences, Republic of South AfricaThe ecophysiological responses of two karoo shrubs to sheep browsing at different stocking rates were studied. The responses of a relatively unpalatable shrub (Pteronia tricephala), and of a shrub of greater palatability (Eriocephalus ericoides) were examined at high, intermediate and... -
Spring and autumn nitrogen fertiliser effects, with and without phosphorus, potassium and sulphur, on dairy pastures: Pasture nutritive value and mineral content
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: F.R. McKenzie --- Department of Natural Resources and Environment, Australia J.L. Jacobs --- Department of Natural Resources and Environment, Australia M. Ryan --- Department of Natural Resources and Environment, Australia G. Kearney --- Department of Natural Resources and Environment, AustraliaExperiments were conducted at three sites to examine effects of applying different nitrogen (N) fertilisers at 45 kg N ha−1, with and without phosphorus (P), potassium (K) and sulphur (S) on dairy pasture nutritive value and mineral content in autumn... -
Which grazing management practices are most appropriate for maintaining biodiversity in South African grassland?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TG O'Connor --- , South Africa P Kuyler --- Centre for Environmental Management, Faculty of Natural and Agricultural Sciences, South Africa KP Kirkman --- School of Biological and Conservation Sciences, South Africa B Corcoran --- , South AfricaThe relative benefit of different grazing management practices for maintaining grassland biodiversity integrity was assessed. Practices considered were grazing system, stocking rate, animal type, grazing season, fire–grazing interaction, plus burning regime. Sparse empirical data indicated that stocking rate, cattle-to-sheep ratio,... -
Of goats and spines – a feeding experiment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C Skarpe --- Department of Forestry and Wildlife Management, Norway R Bergström --- Department of Wildlife, Fish and Environmental Studies, Sweden K Danell --- Department of Wildlife, Fish and Environmental Studies, Sweden H Eriksson --- , Italy C Kunz --- , SwedenSpines in plants have evolved to reduce mammalian herbivory, and their main function may be to protect twigs more than photosynthetic tissue. Type and frequency of spines vary at different scales. We hypothesised that different types of spines affect animal... -
Crop–livestock interactions: implications for policy-makers and for farmers
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Brigid Letty --- , South Africa Rauri Alcock --- , South AfricaThis paper was prepared in response to a paper prepared by Vetter (in this issue) that addressed the issue of policy development related to sustainable management of rangelands. In line with the sentiments of Vetter, policies are understood to guide... -
Towards reduced herbicide use in forest vegetation management
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: K.M. Little I. Willoughby R.G. Wagner P. Adams H. Frochot J. Gava S. Gous R.A. Lautenschlager G. örlander K.V. Sankaran R.P. WeiMechanical, manual, thermal, biological and chemical methods of managing forest vegetation have, to a large extent, been developed independently. The effectiveness and relatively low cost of chemical herbicides, however, have led to systems of vegetation management that rely on their... -
A Survey of Tree Planting Practices in the Smallholder Farming Sector of Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: EnosM. Shumba --- Forest Research Centre, Zimbabwe Abisai Mushaka --- Forest Research Centre, Zimbabwe Joseph Muchichwa --- Forest Research Centre, ZimbabweGroup meetings and individual farm visits were used to establish current tree planting practices in the smallholder farming sector of Zimbabwe. The number of tree species planted in each of the eight districts studied ranged from nine to 27 with... -
Program for the deterministic modelling of genetic gains of tree breeding and seed and clone production strategies
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S.D. Vernyn --- , South Africa C.L. Snedden --- , South Africa R.C. Parfitt --- , South AfricaA deterministic modelling algorithm was developed for the prediction of genetic gains of six breeding and 11 (seed and clone) production strategies. This algorithm can run iteratively over ranges of parameters which affect the genetic gains. These parameters are the... -
Controlled Pollination in Pinus Patula: Constraints and Possible Solutions
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: C. Bester --- , L. H.C. van der Merwe --- , J.L. Malema --- ,Pinus patula is the most important commercial pine species grown in southern Africa and it is, therefore, very important to have well developed breeding and production strategies for this species. Strategies which have been developed for SAFCOL's breeding programme include... -
Researching Child Sexual Abuse in South Africa: Complexities in the Field
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Tlakale Nareadi Phasha --- Department of Educational Psychology, South AfricaThis study reports on my fieldwork experiences applying qualitative research strategies to study child sexual abuse in South Africa. It considers the challenges associated with, at three stages of data collection: ethical clearance, recruitment and data collection, followed by possible... -
Stressors and Coping Strategies of State University Students in a Developing Country
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Joseph M. Kasayira --- Midlands State University, Zimbabwe Kudzai S. Chipandambira --- Midlands State University, Zimbabwe Chipo Hungwe --- Midlands State University, Zimbabwe Anniah Mupawose --- University of the Witwatersrand, South AfricaThe study examined stressors and coping strategies of 281 Social Sciences students at the Midlands State University in Zimbabwe (49% female, 51% male). A questionnaire was used to collect data. The results showed that the 7 most common stressors were:... -
Levels of Social Support and Coping Strategies in Adult Survivors of Child Sexual Abuse
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Patricia Marivate --- University of Limpopo, Sylvester Ntomchukwu Madu --- University of Limpopo,The study examined the effects of levels of social support and types of coping strategies on the psychological adjustment of adult survivors of childhood sexual abuse. Five hundred students from two universities in the Limpopo Province of South Africa participated... -
Stress in Doctors: A Pilot Study of the University Teaching Hospital, Lusaka, Zambia
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Anitha Menon --- University of Zambia, Betty Munalula --- University of Zambia, Christine Glazebrook --- University of Nottingham,This study had the objective of explored the stressful aspects of a doctor's job at the University Teaching Hospital (UTH) in Lusaka, Zambia. Stress can have a serious effect on the work output of a doctor and on their physical... -
Social-Psychological Factors Associated with Bullying Behaviour among Secondary School Students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ojedokun A. Oluyinka --- Olabisi Onabanjo University,This study investigated the association between social-psychological factors (misconduct, impulsivity, school sense of belonging, intention to use non-violent strategies, beliefs supportive of violence) and bullying behaviour. A total of two-hundred and fifteen (n=215) secondary school students randomly selected from five... -
A Parent's Experience of the Couple Relationship After Child Bereavement in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jeanette Maritz --- University of Johannesburg, Marie Poggenpoel --- University of Johannesburg, Chris Myburgh --- University of Johannesburg,The objective of this qualitative, exploratory, descriptive and contextual research was to explore and describe a parent's experience of the couple relationship after child bereavement in South Africa. Participants were nine parents as well as the researcher who lost children... -
Child Abuse: Psychosocial and Religious Intervention Strategies in Zimbabwe
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Regis Chireshe --- Walter Sisulu University, Excellent Chireshe --- Great Zimbabwe University, Pilot Mudhovozi --- University of Venda,The article examines psychosocial and religious intervention strategies used to prevent and manage child abuse in Zimbabwe. Psychosocial interventions used include primary, secondary and tertiary interventions. Religious interventions include primary and tertiary intervention. It appears that the intervention strategies are... -
Academic Counselling for Graduate Research Students with Distance Learning
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Levison Maunganidze --- University of Venda, South Africa Tholene Sodi --- University of Venda, South Africa Pilot Mudhovozi --- University of Venda, South Africa Elias Mberi --- Zimbabwe Open University, Jane Mutasa --- Zimbabwe Open University,The study examined academic counselling needs for graduate research students enrolled with a distance education university. Participants were 17 students (males = 10, females = 7; mean years of enrollment =1). They responded to an open ended questionnaire on pertinent... -
Adult ADHD in a Student Population: Preliminary Findings
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Alban Burke --- University of Johannesburg, Tracey-Lee Austin --- University of Johannesburg, Chantal Waldeck --- University of Johannesburg,The study provides preliminary findings about the likely prevalence rates of ADHD in a South African student population. Data collected using self-report measures to identify symptoms of this disorder, are reported. Participants were 402 undergraduate psychology students. They completed the... -
‘Bhuti’: Meaning and Masculinities in Xhosa Brothering
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Lisa Saville Young --- Rhodes University, South Africa Catherine Jackson --- Rhodes University, South AfricaThe article explores the connections between context, masculinity and the fraternal relationship to understand brotherhood in Xhosa culture. The participant was a Xhosa man (32 years old, with tertiary level education). Data were collected using a semi-structured interview. The data... -
Adjustment Experiences of International Students at a South African University
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Pilot Mudhovozi --- University of Venda, South AfricaThe study explored the experiences of international students at a South African university. A purposeful sample of seven international students were the participants (males = 3, females = 4, age range = 22 to 28 years). Content analysis of the... -
“I am doing okay”: Intrapersonal Coping Strategies of Children Living in an Institution
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Kesh Mohangi --- University of Pretoria, South Africa Liesel Ebersöhn --- University of Pretoria, South Africa Irma Eloff --- University of Pretoria, South AfricaIn this case study, we utilized a Resilience framework and Sense of Coherence theory to understand how a group of children coped while living in an institution as a consequence of HIV/AIDS. We followed a qualitative and interpretivist approach. The... -
Guidelines with Strategies for Enhancement of Resilience and Psycho-Social Well-Being in Professional Nurses
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Magdalena P. Koen --- North-West University, South Africa Chrizanne van Eeden --- North-West University, South Africa Marié P. Wissing --- North-West University, South Africa Vicki Koen --- North-West University, South AfricaThere are currently no guidelines available for enhancement of resilience in professional nurses. This study aims to provide broad guidelines with specific strategies that may enhance resilience and psycho-social well-being in professional nurses. These guidelines are based findings from previous... -
Sex Differences in the Attribution of Shame And Guilt
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Mark Brophy --- University of Johannesburg, Gert Kruger --- University of Johannesburg,This study examined how the sex of a participant could moderate the elicitation of shame and guilt. Four hundred ninety students (107 men and 383 women) between the age of 17 and 20 (M=18.66, SD=.80) volunteered to participate. Moderated multiple... -
Compactness with Respect to a Convergence Structure
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Josef SlapalA convergence structure for a category is given by determining convergent nets and their limits for each object of this category under validity of some basic convergence axioms. The nets considered are obtained as a categorical generalization of the usual... -
Non-cancellation Phenomena in the Class Of Finitely Generated Groups with Finite Commutator Subgroups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Habtay GhebrewoldWe observe some non-cancellation phenomena arising from recent studies of the non-cancellation set χ (G) of a certain group G. Here χ (G) denotes the set of all isomorphism classes of groups H such that H × Z G ×... -
Balanced and Closed-generated Filters In Frames
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Themba DubeWe introduce the notions of balanced filters and closed-generated filters in frames and use them to give a new characterisation of normality for frames, and hence, due to normality being a conservative property, a new characterisation of normality for topological... -
A Pointfree Study of Bases For Spaces Of Minimal Prime Ideals
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Melvin Henriksen Joanne Walters-WaylandLet C (X) denote the ring of all real-valued continuous functions on a topological space X, and mX its space of minimal prime ideals with the hull-kernel topology. It has a base consisting of clopen sets and which contains the... -
Mapping spaces and homotopy theory
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: PeterI. BoothLet q : Y → B be a map (= continuous function) and Z be a space. We will use Y ! Z to denote a set of partial maps from Y to Z, i.e.those such maps whose domains are... -
Group invariant solutions for two dimensional solute transport under realistic water flows
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: R.J. Moitsheki P. Broadbridge M.P. EdwardsWe consider a form of the solute transport equation in streamline coordinates. Symmetry analysis of the equation for solute transport with realistic water flows, result in a number of admitted nontrival classical Lie point symmetries. Reduction by one of the... -
Cutting down very simple trees
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Alois PanholzerWe study here, by using a recursive approach, the number of random cuts that are necessary to destroy a random tree of size n for simply generated tree families. Crucial for the applicability of such a recursive approach is a... -
Almost Perfectly Continuous Functions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: D. Singh --- Department of Mathematics, IndiaThe aim of the present paper is to continue the study of almost perfectly continuous (≡ regular set connected) functions initiated by Dontchev, Ganster and Reilly. It turns out that in general the notion of almost perfectly continuity is independent... -
Banach-Stone-like theorems for lattices of uniformly continuous functions
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: M. Hušek --- , A. Pulgarín --- Avda. Universidad s/n, SpainNew couples of uniform spaces X, Y are found out for which a lattice isomorphism between U(X) and U(Y) implies a uniform homeomorphism between X and Y. -
What do Tanzanian children worry about?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Mai Bente Snipstad Gro Therese Lie Dagfinn WinjeThis paper explores the worries of children in a sample of 8- to 15-year-old children, drawn from three primary schools on the outskirts of Moshi, Tanzania. Data about children's worries were collected by two methods. First, lists of worries were... -
Beyond liminality: orphanhood and marginalisation in Botswana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Marguerite DanielFor children, the death of a parent initiates a rite of passage, a three-stage process: separation from their status as 'son' or 'daughter', a period of liminality with rituals of mourning, burial and interment, and finally re-aggregation into a re-formed... -
The children left to stand alone
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Sidsel RoalkvamDrawing upon ethnographic fieldwork in Seke, a semi-rural area outside Harare, Zimbabwe, this paper explores the social mechanism behind the seeming invisibility of children left on their own and how this form of 'invisibility' challenges established notions of childhood, parenthood,... -
Community impact of HIV status disclosure through an integrated community home-based care programme
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Busisiwe Ncama Leana UysThe integration of HIV-prevention activities into care has received little attention within or outside formal healthcare settings. The contribution of community home-based care services in facilitating disclosure of HIV status and reducing stigma have also not been described. This study... -
Fertility desire and family-planning demand among HIV-positive women and men undergoing antiretroviral treatment in Addis Ababa, Ethiopia
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Wossenyelesh Tamene Mesganaw FantahunLittle information exists about desire to have children and family-planning use among HIV-positive individuals and how this may vary according to individual, social, health and demographic characteristics, especially in developing countries. To assess these topics in Ethiopia, a facility-based cross-sectional... -
HIV/AIDS messages as a spur for conversation among young South Africans?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Elizabeth Lubinga --- School of Languages and Communication Studies, South Africa Margrit Schulze --- School of Languages and Communication Studies, South Africa Carel Jansen --- , The Netherlands Alfons Maes --- , The NetherlandsHIV/AIDS messages are often deliberately puzzling so as to increase the chance for them to be used as food for conversation. The South African health organisation ‘loveLife,’ for instance, uses messages that include complicated rhetorical expressions in their media campaigns,... -
Extraction of non-timber forest products as a coping strategy for HIV/AIDS-afflicted rural households in south-eastern Zimbabwe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: MunyaradziJ Mutenje --- School of Agricultural Sciences and Agribusiness, South Africa GeraldF Ortmann --- School of Agricultural Sciences and Agribusiness, South Africa StuartRD Ferrer --- School of Agricultural Sciences and Agribusiness, South AfricaThis article examines the role of the extraction of non-timber forest products (NTFPs) as a coping strategy in response to HIV/AIDS-related economic shocks among rural households in the semi-arid Sengwe communal lands in south-eastern Zimbabwe. Using panel data for 200... -
HIV prevention in the world of work in sub-Saharan Africa: research and practice*
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Gavin George --- Health Economics and HIV and AIDS Research Division (HEARD), South Africa Courtenay Sprague --- Graduate School of Business Administration, South Africa -
Obstacles to creating an environment conducive to HIV prevention for young people
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Roselyn Nm Kareithi --- Adolescent Health Research Unit, South Africa Crick Lund --- Department of Psychiatry and Mental Health, Centre for Public Mental Health, South AfricaThe external environment of an organisation influences the desired goals and interventions of that organisation in many ways. However, strategies for influencing the external context to create a more enabling environment for the interventions of non-governmental organisations (NGOs) are often... -
Questioning the use-value of social relationships: care and support of youths affected by HIV in child-headed households in Port Elizabeth, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Diana Van Dijk --- Centre for International Development Issues Nijmegen (CIDIN), The Netherlands Francien Van Driel --- Centre for International Development Issues Nijmegen (CIDIN), The NetherlandsThe opinion that the extended family can fulfil its supportive role in assisting child-headed households continues to exist. How these households encounter support, what this support entails, and how they experience this support is an under-researched subject. Most research literature... -
Advice dilemmas: Managing advice against the competing public health and counselling imperatives that shape VCT in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Heidi van Rooyen --- HIV/AIDS, Sexually Transmitted Infections and TB (HAST) Programme, South AfricaThe public health and counselling imperatives that shape VCT create advice dilemmas for counsellors. Public health proponents view the dispensing of advice as important, whilst most contemporary counselling dictates that advice should not be given under any circumstances. Using a... -
Youth mortality due to HIV/AIDS in South Africa, 2001–2009: An analysis of the levels of mortality using life table techniques
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Nicole De Wet --- Demography and Population Studies, South Africa Somefun Oluwaseyi --- Demography and Population Studies, South Africa Clifford Odimegwu --- Demography and Population Studies, South AfricaSouth Africa has one of the highest HIV/AIDS prevalence rates in the world. It is estimated that 5.38 million South Africans are living with HIV/AIDS. In addition, new infections among adults aged 15+ were reportedly 316 900 in 2011. New... -
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... -
An assessment of the health of two rivers within Harare, Zimbabwe, on the basis of macroinvertebrate community structure and selected physicochemical variables
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C PhiriThe aim of this study was to assess and compare the water quality of the Gwebi and Mukuvisi Rivers, on the basis of selected physicochemical variables and macroinvertebrate community structure. Five sites where selected on both rivers and these were... -
Developing a protocol for managing the biophysical condition of a water management area: the Sabie catchment case study
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: E van Wyk J Jaganyi B van Wilgen C Breen K Rogers D Roux F VenterRecent modification of the South African Water Law spells out fundamental changes for the way the country's water resources will be managed in the future. One of the most significant mandates is the establishment of Catchment Management Agencies (CMAs) and... -
Catchments as conservation units for riverine biodiversity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MJ WishartThe geological structure and longitudinal nature of river systems provide a possible barrier to the dispersal of lotic organisms. This has the potential to drive evolutionary processes such as genetic differentiation and subsequent allopatric speciation. In the conservation of lotic... -
The application of the Zero Emissions Research and Initiatives (ZERI) concept in an integrated industry-polyculture-farm system in Namibia: The case of Tunweni Sorghum Brewery
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DO OkeyoOne major area dealt with by the concept of Zero Emissions Research and Initiatives (ZERI) is the utilisation of huge volumes of nutrient-rich waters from household toilets, kitchen sinks and municipal and organo-industries for integrated purposes. The arrangements at the... -
The macroinvertebrates of the Cunene River from the Ruacana Falls to the river mouth and assessment of the conservation status of the river
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FC de Moor HM Barber-James AD Harrison CR Lugo-OrtizThe proposed construction of a second hydroelectric power-generating dam on the Cunene (Kunene) River on the Namibia-Angola border, more than 100km downstream of the Ruacana hydroelectric power plant, will have a major influence on the aquatic biota of this river... -
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... -
Comparison of the density and species composition of aquatic invertebrates found between the roots of Eichhornia crassipes plants from two coastal lakes in northern KwaZulu-Natal
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Viljoen DP Cyrus V WepenerThe aquatic invertebrates found between the roots of Eichhornia crassipes plants from Lakes Cubhu and Nsezi were analysed and compared with each other. Root samples in Lake Cubhu were dominated by Corophium triaenonyx and Caridina nilotica whilst root samples from... -
Available information on macroinvertebrates of the Mhlathuze coastal lakes: setting the ecological reserve (lake water requirements)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CF Mackay DP CyrusThis paper reviews current information on the macroinvertebrates of four coastal lakes in the Mhlathuze catchment of Zululand. The fauna are described in terms of the potential influence of lake level changes in response to increasing anthropogenic pressures for available... -
A comparison of several methods of assessing river condition using benthic macroinvertebrate assemblages
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CA BrownThis paper attempts to address some of the problems that are faced in the endeavour to minimise the time and financial costs of environmental monitoring. At the same time, it aims to assess the usefulness to freshwater studies of some... -
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... -
miniSASS — A novel technique for community participation in river health monitoring and management
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: P Mark Graham ChrisWS Dickens R Jim TaylorReliable indicators of water quality and river health are often difficult and expensive to derive. This paper reports on a process to develop a low technology, scientifically reliable and robust technique to monitor water quality in rivers and streams. With... -
The effects of lead, water hardness and pH on oxygen consumption, plas- ma chlorides and bioaccumulation in the freshwater fish Tilapia sparrmanii
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: WJ van Aardt LCR VenterClosed system respirometry was performed on captive juvenile Tilapia sparrmanii exposed for 96 hours to a range of Pb-acetate concentrations in hard and soft water to determine the effect of Pb in relation to water hardness and pH. For hard... -
The biology of Barbus mattozi Guimaraes (Teleostei, Cyprinidae) in a Zimbabwean reservoir. 3. Numbers, biomass and mortality
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BG Donnelly BE MarshallThe population of B. mattozi in the Mtsheleli Dam, Zimbabwe, was estimated to be about 55 000 fish in July 1974 but fell to about 370 by June 1975. The total biomass followed a similar trend, reaching 2 000kg (43kg... -
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 Namibian Scoring System (NASS) version 2 rapid bio-assessment method for rivers
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RW Palmer ED TaylorThis paper presents a rapid bio-assessment method for assessing the ecological condition of streams and rivers in Namibia. The method uses the composition and abundance of aquatic invertebrates, which are identified in the field, mostly to family level. The method... -
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... -
Louisiana crayfish (Procambarus clarkii) (Crustacea: Cambaridae) in Kenyan ponds: non-target effects of a potential biological control agent for schistosomiasis
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DavidM Lodge SadieK Rosenthal KennethM Mavuti Wairimu Muohi Philip Ochieng SamanthaS Stevens BenjaminN Mungai GeraldM MkojiThe Louisiana crayfish (Procambarus clarkii) has been proposed as a biological control agent for the intermediate snail hosts (Bulinus and Biomphalaria spp.) of human schistosomes (Schistosoma haematobium and S. mansoni) in Kenya. Using laboratory and field experiments, we examined the... -
Preliminary testing of the Integrated Habitat Assessment System (IHAS) for aquatic macroinvertebrates
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DeanJ Ollis Charles Boucher HelenF Dallas KarenJ EslerPreliminary testing of the Integrated Habitat Assessment System (IHAS), a widely-used aquatic macroinvertebrate habitat assessment method in South Africa, was undertaken. Based on the sensitivity of the South African Scoring System (SASS) to biotope availability and assuming that SASS Scores... -
Towards the development of a macroinvertebrate sampling technique for palustrine wetlands in South Africa: a pilot investigation in the KwaZuluNatal midlands
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Rebecca Bowd DonovanC Kotze CraigD Morris NevilW QuinnA study was undertaken in November 2003 to derive a suitable sampling technique for collecting a representative sample of aquatic macroinvertebrates from a selected emergent vegetation biotope in a palustrine wetland, Melmoth Vlei, KwaZulu-Natal, South Africa. The aim was to... -
The effect of water hyacinth, Eichhornia crassipes (Martius) SolmsLaubach (Pontederiaceae), on benthic biodiversity in two impoundments on the New Year's River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JohnM Midgley MartinP Hill MartinH VilletWater hyacinth, Eichhornia crassipes (Martius) Solms-Laubach (Pontederiaceae), forms thick mats that affect water resource utilisation, but little is known about its impacts on biodiversity in aquatic ecosystems. The benthic invertebrate community and algal biomass were sampled under water hyacinth mats... -
Influence of salinity and temperature on the larval development of the crown crab, Hymenosoma orbiculare (Crustacea: Brachyura: Hymenosomatidae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Isabelle Papadopoulos BrentK Newman DaveS Schoeman TrisH WooldridgeAlthough the crab Hymenosoma orbiculare appears to complete its entire life cycle within estuaries, the salinity and temperature requirements for its successful larval development are not known. The present study therefore evaluated larval response to salinity and temperature in combination... -
The trophic position of planktonic ciliate populations in the food webs of some East African lakes
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AndrewW Yasindi WilliamD TaylorThe trophic role of planktonic ciliates was investigated in the food webs of 17 East African lakes of different salinity and trophy. Experiments with 1μm latex beads showed that Cyclidium, Halteria, Dysteria, Aspidisca and Vorticella are bacterivores. Examination of food... -
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... -
Testing the applicability of the SASS5 scoring procedure for assessing wetland health: a case study in the KwaZulu-Natal midlands, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Rebecca Bowd DonovanC Kotze CraigD Morris NevilW QuinnA study was undertaken between 29th January and 17th February 2004 to test the applicability of the South African Scoring System Version 5 (SASS5) scoring and calculation procedure in nutrient-enriched palustrine wetlands in the midlands of KwaZulu-Natal, South Africa. Four... -
The South African Scoring System (SASS) Version 5 Rapid Bioassessment Method for Rivers
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C WS Dickens --- , South Africa PM Graham --- , South AfricaThe assessment of biota in rivers is a widely recognised means of determining the condition or ‘health’ of rivers. Benthic macroinvertebrates, in particular, are recognised as valuable organisms for bioassessments, due largely to their visibility to the naked eye, ease... -
The cost of water hyacinth control in South Africa: a case study of three options
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: E van Wyk --- , South Africa BW van Wilgen --- , South AfricaThe aquatic plant water hyacinth (Eichhornia crassipes) was first recorded in South Africa during the early part of the 20th century. The plant has since spread across the country and is found in water bodies in both sub-tropical and temperate... -
Quantitative aspects of oxygen and carbon dioxide exchange through the lungs in Ocypode ceratophthalmus (Crustacea: Decapoda) during rest and exercise in water and air
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: WJ van Aardt --- School of Environmental Sciences and Development, South AfricaGhost crabs Ocypode ceratophthalmus were exercised in air and water to measure CO2 and O2 exchange rates using the method of instantaneous measurements of oxygen consumption rate (MO2) where applicable. Average heart rate increased from 100 to nearly 400 pulses... -
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... -
Benthic faunal distribution and abundance in the Mfolozi–Msunduzi estuarine system, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SG Ngqulana --- Coastal Research Unit of Zululand, Department of Zoology, South Africa RK Owen --- Coastal Research Unit of Zululand, Department of Zoology, South Africa L Vivier --- Coastal Research Unit of Zululand, Department of Zoology, South Africa DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaThe Mfolozi–Msunduzi estuarine system historically shared a common mouth with the St Lucia estuarine system. In 1952, a separate mouth was created, 1.5 km south of St Lucia mouth, to prevent silt carried by the Mfolozi River from entering Lake... -
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... -
Ecological health of the Usuthu and Mbuluzi rivers in Swaziland based onselected biological indicators
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CN Magagula --- Department of Biological Sciences, Swaziland AB Mansuetus --- Department of Biological Sciences, Swaziland JO Tetteh --- Department of Biological Sciences, SwazilandBiological monitoring, using coliform bacteria and macroinvertebrate populations and diversity, was carried out monthly from August 2004 to January 2005 to determine the ecological health of the Usuthu and Mbuluzi rivers in Swaziland. Water temperature and pH were not significantly... -
Temporal and spatial variability in macroinvertebrate community structure in relation to environmental variables in Ajijiguan Creek, Niger Delta, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FO Arimoro --- , South Africa RB Ikomi --- Department of Animal and Environmental Biology, Nigeria IO Ajuzieogu --- Department of Animal and Environmental Biology, Nigeria FO Nwadukwe --- Department of Animal and Environmental Biology, NigeriaVariations in macrobenthic community structure in time and space along a pollution gradient were examined in a small Niger Delta creek in 2006–2007. Salinity fluctuated between fresh and mesohaline conditions with values ranging from 0.4 to 5.2, and conductivity ranged... -
The effect of feeding regimen on growth, food conversion ratio and size variation in juvenile dusky kob Argyrosomus japonicus (Teleostei: Sciaenidae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Kaiser --- Department of Ichthyology and Fisheries Science, South Africa PD Collett --- Department of Ichthyology and Fisheries Science, South Africa NG Vine --- Department of Ichthyology and Fisheries Science, South AfricaTemperature, feeding frequency and feeding intensity are important determinants of fish growth in aquaculture. As part of a research and development programme to optimise husbandry techniques for a new mariculture species, the dusky kob, Argyrosomus japonicus, this study tested the... -
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,... -
The influence of pool size on species diversity and water chemistry in temporary rock pools on Domboshawa Mountain, northern Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Anusa --- Tropical Resources Ecology Programme (TREP), Department of Biological Sciences, Zimbabwe HGT Ndagurwa --- Tropical Resources Ecology Programme (TREP), Department of Biological Sciences, Zimbabwe CHD Magadza --- Tropical Resources Ecology Programme (TREP), Department of Biological Sciences, ZimbabweThe effect of pool size (area and depth) on species diversity and physicochemical characteristics of rock pool habitats on Domboshawa Mountain, northern Zimbabwe, was studied from December 2006 to May 2007. Pools were categorised based on maximum depth. Pool duration... -
Activity and feeding of Dotilla fenestrata (Brachyura: Ocypodidae) in a warm, temperate South African estuary
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Bulcao --- Department of Zoology and Entomology, South Africa AN Hodgson --- Department of Zoology and Entomology, South AfricaThe activity of and consumption of organic material by the sand-bubbler crab Dotilla fenestrata was studied over neap and spring tides on a sheltered sand bank close to the mouth of the warm, temperate Kowie Estuary, South Africa. Crabs emerged... -
A preliminary survey of biotic composition of the Olifantspruit catchment, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ZCC Khoza --- Department of Biodiversity, South Africa MJ Potgieter --- Department of Biodiversity, South Africa W Vlok --- Department of Zoology, South AfricaAs a major tributary of the Nyl River, and ultimately for the Nylsvley wetland, the Olifantspruit, Limpopo province, South Africa, was investigated during the summer (high flow) and winter (low flow) of 2007 at three sites. This preliminary study used... -
Turnover patterns in fish versus macroinvertebrates — implications for conservation planning
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- School of Agricultural, Earth and Environmental Sciences, South AfricaSpatial patterns in taxonomic richness and turnover for fish and aquatic macroinvertebrates are compared to assess the relative usefulness of each taxonomic group in mapping biodiversity patterns. Fish and aquatic macroinvertebrate species data for sites down the longitudinal axes of... -
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... -
Rapid colonisation of artificial substrates by macroinvertebrates in a South African lentic environment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AJ Booth --- Department of Ichthyology and Fisheries Science, South Africa WT Kadye --- Department of Ichthyology and Fisheries Science, South Africa T Vu --- Department of Ichthyology and Fisheries Science, South Africa M Wright --- Department of Ichthyology and Fisheries Science, South AfricaMacroinvertebrate colonisation patterns on artificial substrates were investigated in a small reservoir in the Eastern Cape, South Africa. Semi-closed 1 000 cm3 polythene netting cages filled with either brick, gravel, shredded plastic, or equal proportions of these three materials, were... -
Evaluation of acoustic transmitter implantation and determination of post-translocation behaviour of largemouth bass Micropterus salmoides in a South African impoundment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CF Huchzermeyer --- Department of Ichthyology and Fisheries Science (DIFS), South Africa OLF Weyl --- , South Africa PD Cowley --- , South AfricaLargemouth bass Micropterus salmoides are an important angling species that are often displaced during catch-and-release fishing tournaments. The impact of acoustic transmitter implantation on this species and the effect of displacement distance on their behaviour were tested. In April 2010,... -
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... -
An integrated remote sampling approach for aquatic invertebrates associated with submerged macrophytes
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PSR Weyl --- Department of Zoology and Entomology, South Africa JA Coetzee --- Department of Zoology and Entomology, South AfricaA sampling method and apparatus for collecting meaningful and quantifiable samples of aquatic macroinvertebrates, and the macrophytes they are associated with, are presented. Where physical danger from wildlife is a significant factor, especially in Africa, this apparatus offers some safety... -
Dynamics of a cyanobacterial bloom in a hypereutrophic reservoir, Lake Chivero, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mhlanga --- Department of Biological Sciences, Zimbabwe W Mhlanga --- Department of Environmental Science, ZimbabweBlooming and non-blooming periods between 2004 and 2006 in a hypereutrophic reservoir, where cyanobacterial blooms have previously been reported to be permanent, presented an opportunity to characterise factors that may favour cyanobacterial dominance. As a bloom developed in May 2004,... -
Relationship between Growth Rate and Foliar Concentrations of Nitrogen, Phosphorus and Potassium for Eucalyptus grandis
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- , Republic of South Africa M.A. Herbert --- , Republic of South AfricaThe growth responses to applications of N, P, K and lime are described briefly for four comprehensive fertiliser experiments with Eucalyptus grandis. Foliar concentrations of N, P and K were determined for these experiments, and their relationship to growth rate... -
The Structure of Cellulose by Conformational Analysis.
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. Pizzi --- , N. Eaton --- ,Conformational analysis studies on the tertiary structure of cellobiose and methyl-β-cellobioside were carried out by using calculations of Van der Waals, H-bond, electrostatic and torsional energy interactions between the atoms and groups of the molecules. Energy maps in function of... -
The Structure of Cellulose by Conformational Analysis.
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. Pizzi --- Council for Scientific and Industrial Research, South Africa N. Eaton --- Council for Scientific and Industrial Research, South AfricaThe Meyer/Misch and related models were found to be the most energetically stable for the crystalline structure of cellulose I. The cellobioside structure is the monomer of cellulose I as structures having cellobiose as monomer have been proven to be... -
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... -
Population Dynamics and Spawning of the Flatfish Solea Bleekeri and Pseudorhombus Arsius in the Intertidal Area of Inhaca Island, Moçambique
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A. M. P. Van Schie W. F. De BoerThe population dynamics of flatfish Solea bleekeri and Pseudorhombus arsius within the intertidal area of Inhaca Island, Moçambique, was investigated using bottom trawl data collected during summer (December 1996 – March 1997) and winter (June 1997 – August 1997). The... -
A Social Cost-benefit Analysis of a Small-scale Clam Fishery in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. Sims-Castley S. G. HoskingWhen a proposal was advanced in 1991 to harvest the wedge clam Donax serra in the Eastern Cape, South Africa, for commercial gain, it elicited a huge public outcry. In order to shed light on the issue, a social cost-benefit... -
Dynamics of the Fishery for Galjoen Dichistius Capensis, With an Assessment of Monitoring Methods
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C. G. AttwoodThe dynamics of the fishery for galjoen Dichistius capensis were investigated at four sites in South Africa from 1987 to 2000. At three sites, which were protected from fishing, Koppie Alleen, Lekkerwater (both in the De Hoop Marine Protected Area)... -
Do dart tags suppress growth of dusky kob Argyrosomus japonicus?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MH Griffiths CG AttwoodGrowth rates of dusky kob Argyrosomus japonicus calculated from mark-recapture and otolith-reading methods were compared. Mark-recapture data showed that A. japonicus are resident in an area between the Breede River Estuary and Cape Agulhas on the south-east coast of South... -
Growth patterns of the pearl oyster Pinctada margaritifera L. in Gazi Bay, Kenya
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KM Mavuti EN Kimani T MukiamaCulture of pearl oysters is rapidly increasing worldwide, including the western Indian Ocean. The oyster Pinctada margaritifera L., which produces the most highly valued black pearls, occurs in East Africa, a nd as been exploited there for the shell for... -
Maintenance mechanisms of plankton populations in frontal zones in the Benguela and Angola Current systems: a preface
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HM Verheye W EkauThis preface provides the background to, and synthesis of research findings from, a set of environmental research-driven cruises off southern Angola, Namibia and South Africa during February–March 2002, under the auspices the BENguela Environment Fisheries Interaction and Training (BENEFIT) Programme... -
Life strategies, energetics and growth characteristics of Calanoides carinatus (Copepoda) in the Angola-Benguela frontal region
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HM Verheye W Hagen H Auel W Ekau N Loick I Rheenen P Wencke S JonesRates of daily egg production, moulting and egg hatching success, as well as total lipid content and composition of Calanoides carinatus, were measured in the region of the southern Angola Curre nt SAC), the Angola-Benguela Front (ABF) and the coastal... -
Below the Kolmogorov scale: the non-turbulent sex life of phytoplankton
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L PeperzakBelow the Kolmogorov length scale there is no turbulence and phytoplankton gametes swim in order to encounter each other and achieve syngamy. An encounter rate model, Z = π √2 R2 u N, is derived incorporating cell size (R), swimming... -
Few data but many fish: marine small-scale fisheries catches for Mozambique and Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Jacquet --- Sea Around Us Project, Fisheries Centre, Canada H Fox --- Conservation Science Program, USA H Motta --- WWF Mozambique Coordination Office, Mozambique A Ngusaru --- EAME Programme, WWF-Tanzania Programme Office, Tanzania D Zeller --- Sea Around Us Project, Fisheries Centre, CanadaThe fisheries data supplied to the Food and Agriculture Organization of the United Nations (FAO) by national agencies have served as the primary tool for many global and regional studies. However, it is recognised that these data are incomplete and... -
Assessment of South African Umbrina robinsoni based on per-recruit models
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Hutchings --- Zoology Department and Marine Biology Research Centre, South Africa MH Griffiths --- Ministry of Fisheries, New ZealandSlender baardman Umbrina robinsoni are an important component of recreational shore-angler and spearfisher catches along the eastern seaboard of South Africa. Stocks of U. robinsoni at three sites—False Bay, Stil Bay and the KwaZulu-Natal (KZN) coast—were modelled using a per-recruit... -
Structure of a toothed cetacean community around a tropical island (Mayotte, Mozambique Channel)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Kiszka --- Observatoire des Mammifères Marins, Mayotte PJ Ersts --- , USA V Ridoux --- Observatoire des Mammifères Marins, MayotteWe describe the structure of a toothed cetacean community around the island of Mayotte (South-West Indian Ocean, 45°10′ E, 12°50′ S), using data collected from small boat-based surveys conducted between July 2004 and June 2006. In all, 16 odontocete species... -
An investigation of the effect of temporal variation in growth rate of Umbrina robinsoni on biological reference point estimates calculated using per-recruit models
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Hutchings --- Department of Zoology and Marine Biology Research Centre, South Africa MH Griffiths --- Ministry of Fisheries, New Zealand SJ Lamberth --- Branch Fisheries, Department of Agriculture, Forestry and Fisheries, South AfricaThe effect of temporal variation in growth rate on per-recruit model outputs was investigated by comparing biological reference points obtained using growth curves derived for Umbrina robinsoni populations from False Bay, on the south coast of South Africa, sampled 10... -
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)... -
Natural markings of Cuvier's beaked whale Ziphius cavirostris in the Mediterranean Sea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Rosso --- CIMA Research Foundation, Italy M Ballardini --- , Italy A Moulins --- CIMA Research Foundation, Italy M Würtz --- Biology Department, ItalyErrors in analysis using natural marks have been recognised since the early development of mark-recapture techniques. In this nine-year study, the mark types present on Cuvier's beaked whales Ziphius cavirostris in the Mediterranean Sea were categorised in order to assess... -
Integrated culture of silver kob Argyrosomus inodorus and bloodworm Arenicola loveni loveni in abalone farm effluent
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RD Yearsley --- Department of Ichthyology and Fisheries Science, South Africa CLW Jones --- Department of Ichthyology and Fisheries Science, South Africa PJ Britz --- Department of Ichthyology and Fisheries Science, South Africa NG Vine --- Department of Ichthyology and Fisheries Science, South AfricaSouth African abalone Haliotis midae farms utilise large volumes of seawater (c. 500–1 500 l s–1) and produce relatively dilute effluents that are potentially suitable for the integrated culture of other species. To test this hypothesis, a marine finfish, silver... -
Prey capture success and chick diet of Damara terns Sterna balaenarum in Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Braby --- Animal Demography Unit, Department of Zoology, South Africa LG Underhill --- Animal Demography Unit, Department of Zoology, South Africa RE Simmons --- Percy FitzPatrick Institute of African Ornithology, Department of Zoology, South AfricaFeeding terns are affected by a variety of environmental conditions. We studied prey capture success of Damara terns Sterna balaenarum in relation to six variables at two breeding colonies in southern Namibia: tidal phase, wind speed, water clarity, cloud cover,... -
Acoustic behaviour of southern right whales in relation to numbers of whales present in Walker Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LH Hofmeyr-Juritz --- , South Africa PB BestEstimating numbers of whales present in an area from recorded call rates could be a useful conservation tool. We recorded southern right whale Eubalaena australis vocalisations and presence in Walker Bay on the south coast of South Africa. In all,... -
Growth and survival of the South African scallop Pecten sulcicostatus in suspended culture
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DCZ Arendse --- Department of Agriculture, Forestry and Fisheries, South Africa GC Pitcher --- Department of Agriculture, Forestry and Fisheries, South AfricaGrow-out studies of the scallop Pecten sulcicostatus, endemic to the South African coast, contribute to an investigation of the suitability of this species for commercial culture. Hatchery-reared juvenile scallops were placed in a suspended culture system at 5 m depth... -
Spawning strategies and transport of early stages of the two Cape hake species, Merluccius paradoxus and M. capensis, in the southern Benguela upwelling system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Grote --- , Germany EK Stenevik --- , Norway W Ekau --- , Germany HM Verheye --- Oceans and Coasts Research, Department of Environmental Affairs, South Africa MR Lipiński --- Branch: Fisheries, Department of Agriculture, South Africa W Hagen --- Marine Zoology, GermanySeasonal and short-term variability of environmental parameters influence the spawning strategies of fish species. In this study, the spawning strategies and the transport of early stages of the two Cape hake species off South Africa were investigated. Distribution of eggs... -
In situ video observations of benthic megafauna and fishes from the deep eastern Mediterranean Sea off Egypt
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AR Gates --- SERPENT Project, UK DOB Jones --- SERPENT Project, UK JE Cartes --- , SpainRemotely operated vehicle (ROV) video observations were used to document benthic fauna at a hydrocarbon drilling location, at 2 720 m depth, in the poorly studied deep water off northern Egypt. The decapod Chaceon mediterraneus was the most common organism... -
Plant traits and spread of the invasive salt marsh grass, Spartina alterniflora Loisel., in the Great Brak Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JB Adams --- Department of Botany, South Africa A Grobler --- Department of Botany, South Africa C Rowe --- Department of Botany, South Africa T Riddin --- Department of Botany, South Africa TG Bornman --- , South Africa DR Ayres --- Evolution and Ecology, USASpartina alterniflora Loisel., widely recognised as an aggressive invader of estuaries and salt marshes around the world, was discovered growing in the temporarily open/closed Great Brak Estuary on the southern Cape coast of South Africa in 2004. This is the... -
A review of the Oceanographic Research Institute's Cooperative Fish Tagging Project: 27 years down the line
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SW Dunlop --- , South Africa BQ Mann --- , South Africa RP van der Elst --- , South AfricaThe Oceanographic Research Institute's (ORI) Cooperative Fish Tagging Project was initiated in 1984 and is one of the most enduring and successful environmental projects of its kind in South Africa. By the end of 2011, 5 130 anglers had joined... -
Innovative processes and products involving marine organisms in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J J Bolton --- Department of Biological Sciences, South Africa M T Davies-Coleman --- Department of Chemistry, South Africa V E Coyne --- Department of Molecular and Cell Biology, South AfricaThe SEAChange programme, instituted in 2007 under the auspices of the South African Network for Coastal and Oceanic Research (SANCOR), included four interdependent research themes, one of which was Marine Biotechnology. Marine biotechnology is a discipline that involves both basic... -
Epiphytic seaweeds and invertebrates associated with South African populations of the rocky shore seagrass Thalassodendron leptocaule — a hidden wealth of biodiversity
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CM Browne --- Department of Biological Sciences and Marine Research Institute, South Africa R Milne --- Department of Biological Sciences and Marine Research Institute, South Africa C Griffiths --- Department of Biological Sciences and Marine Research Institute, South Africa JJ Bolton --- Department of Biological Sciences and Marine Research Institute, South Africa RJ Anderson --- Department of Biological Sciences and Marine Research Institute, South AfricaSeagrasses support a great diversity of epiphytic organisms. There are no detailed published accounts of algae and animals growing on seagrasses in South Africa. The seagrass Thalassodendron leptocaule (previously known as Thalassodendron ciliatum) is unique among southern African seagrasses in... -
Large-scale spatial patterns within soft-bottom epibenthic invertebrate assemblages along the west coast of South Africa, based on the Nansen trawl survey
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Lange --- Department of Biological Sciences and Marine Biology Research Centre, South Africa CL Griffiths --- Department of Biological Sciences and Marine Biology Research Centre, South AfricaKnowledge of benthic invertebrate biodiversity and distribution patterns over the continental shelf of South Africa is poor and this is hampering efforts to design a network of marine protected areas aimed at conserving regional benthic biota. We analysed invertebrate biodiversity... -
A Parametric Study of a Natural Flow Solar Air Heater with a Rectangular Air-Duct Profile
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: H. O. Ondieki [d858022e20] J. K. TonuiThis article presents a theoretical analysis of a solar air heater (SAH) with a rectangular air duct profile operated in a natural airflow mode. The study involves modelling the SAH system and simulated results are used to study the effects... -
Evaluation of methods forestimatingthe metabolic rate according to ISO 8996 in forestry work in Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors:Forestry activities in Southern Mrica may expose forest workers to uncompensable heat stress risk when the climate conditions are such that the body experiences difficulties to dissipate its excess heat to the environment. A study was made in North Eastern... -
Genetic improvement of Eucalyptus grandis using breeding seedling orchards and multiple population breeding strategy in Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: W. J. Gapare --- Forest Sciences Centre, Canada R. D. Barnes --- Department of Plant Sciences, University of Oxford, United Kingdom D. P. Gwaze --- Forest Science Laboratory, College Station, USA B. I. Nyoka --- Forest Research Centre, ZimbabweEucalyptus grandis is commercially important in Zimbabwe and a breeding program has been in progress since 1962. A classical breeding strategy was used initially but, in 1981, the Multiple Population Breeding Strategy (MPBS) was implemented and the concept of the... -
Determination of land and tree values of hybrid poplar plantations: A case study for Turkey
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Sait Engindeniz --- The University of Ege, Faculty of Agriculture, Turkey Aysen Olgun --- The University of Ege, Faculty of Agriculture, TurkeyValuation of poplar plantations is important in condemnation, taxation, loan, insurance, inheritance, and purchase-sale cases. In general, for the appraisal ofland value of poplar plantations, sales comparison and income capitalization approaches can be used. In appraisal of tree values sales... -
A breeding strategy for Acacia mearnsii (black wattle) in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. W. Dunlop --- , R. D. Bairnes --- , UK K. M. Nixon --- , S. F. Hagedorn --- ,The black wattle breeding programme that has served the wattle bark industry ofSouth Africa for the past five decades putlittleemphasis on improvingthe yield and quality ofthe timber, as timberwas not the product ofimportance. Today the timber is as important, ifnot... -
Early growth and survival of Acacia galpinii after planting in a semi-arid environment in Zimbabwe
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: D. Mlambo --- National University of Science and Technology, Zimbabwe P. Nyathi --- National University of Science and Technology, Zimbabwe P. Milo --- National University of Science and Technology, ZimbabweAcacia galpinii grows naturally on the riverbanks and smaller drainage lines in semi-arid areas ofSouthern Africa. Trial planting of the species as a decorative tree commenced in 1993 along urban roads in Bulawayo, Zimbabwe. Early growth and survival of the... -
Parental communication with children about sex in the South African HIV epidemic: raced, classed and cultural appropriations of Lovelines
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Lindy WilbrahamResponsive to perceived high risk of HIV infection by sexually active youth, several South African sexual health-promotion campaigns have used media targeting mothers, instructing them on how sex should be talked about with their children to 'risk-proof' them. A Foucauldian... -
Gender, famine and HIV/AIDS: rethinking new variant famine in Malawi
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Andy GibbsAlthough making a large and rapid impact on our understandings of the interactions between famine and HIV/AIDS, the new variant famine hypothesis has had little critical scrutiny. This paper uses a case study of the Malawian food crisis of 2001/2002... -
Understanding diversity in impact and responses among HIV/AIDS-affected households: the case of Msinga, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Kees Swaans Jacqueline Broerse Irma Van Diepen Monique Salomon Diana Gibson Joske BundersTo gain a more comprehensive understanding of the impact of HIV and AIDS on rural households in Msinga, South Africa, the sustainable livelihoods framework was adapted. An ethnographic perspective was employed to examine: 1) the impact of HIV/AIDS-related illnesses on... -
Employees' perceptions of the Aid-for-AIDS disease-management programme, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Alan Rothberg Karen Van HuyssteenIt is estimated that 18–20% of South Africa's more than 5 million HIV-positive individuals are formally employed. Disease management programmes for these employees vary in scope and sophistication, with services provided by the employer, or third-party specialist disease managers, or... -
Traditional healers, HIV/AIDS and company programmes in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: David DickinsonThis paper explores the organisational structures of traditional healers, outlines their explanations of HIV/AIDS, and discusses how they can be integrated with company programmes. The South African Traditional Health Practitioners Act seeks to register, regulate and promote traditional healers, but... -
HIV/AIDS and family planning services integration: review of prospects for a comprehensive approach in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Gisele Maynard-Tucker --- , United StatesIn most parts of the world, family planning and HIV-related services are usually offered separately. Family planning services, especially those that are government-supported, primarily serve married women and couples of reproductive age, while HIV-related services target individuals at higher-risk of... -
The relationship between temperature and standard rate of metabolism in African lungfish, Protopterus aethiopicus, from Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AshleyW Seifert LaurenJ ChapmanThe relationship between temperature and metabolism among ancient (non-teleost) fishes, while largely unknown, is essential to an understanding of the effects of temperature on fish energetics. This study quantifies the effect of temperature on the standard rate of metabolism in... -
The effect of fish predation on benthic macroinvertebrates in a seasonal stream in north-western Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Albert Chakona Brian Marshall Luc BrendonckThe cumulative impact of the entire fish assemblage on benthic macroinvertebrate assemblages was investigated over four months in a removal experiment in isolated pools that persist through the dry season, in an intermittent stream in north-western Zimbabwe. Macroinvertebrate taxonomic richness... -
A preliminary investigation of winter daily food intake by four small teleost fish species from the Igoda Estuary, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LukhanyisoU Vumazonke TebelloS Mainoane Tembela Bushula EvgenyA PakhomovThe winter diet and daily ration of four small size classes of estuary-associated fishes, Rhabdosargus holubi, Gilchristella aestuaria, Glossogobius callidus and Monodactylus falciformis, from the temporarily open/closed Igoda Estuary were investigated. The diet of G. callidus was dominated by gammarid... -
A chronic toxicity test protocol using Caridina nilotica (Decapoda: Atyidae) and the generation of salinity toxicity data
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AR Slaughter CG Palmer WJ MullerSalinization of freshwater resources is an increasing global problem, yet there is a paucity of chronic salinity tolerance data linked to very few chronic toxicity test protocols. This research aimed to generate a chronic toxicity test protocol and protective salinity... -
The impact of invasive fish and invasive riparian plants on the invertebrate fauna of the Rondegat River, Cape Floristic Region, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: StevenR Lowe DarraghJ Woodford DeanN Impson JennyA DayInvasive fish and plants are widespread in the rivers and riparian zones of the Cape Floristic Region of South Africa and represent potential threats to the highly endemic freshwater fauna. We investigated the impact of invasive smallmouth bass (Micropterus dolomieu)... -
A preliminary assessment of the impact of forest conversion from natural to pine plantation on macroinvertebrate communities in two mountain streams in Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Chakona B MarshallThis study presents preliminary data on the influence of forest conversion from natural to pine plantation on benthic macroinvertebrates in streams in the Chimanimani Mountains in the Eastern Highlands of Zimbabwe, a region that has received little attention with respect... -
Impact of winter flow regulation on pest-level populations of blackfly (Diptera: Simuliidae) and non-target faunal communities in a South African river
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore FC de MoorThe mid-reaches of the Great Fish River in the Eastern Cape Province of South Africa experience regular outbreaks of the pest blackfly Simulium chutteri as a direct consequence of increased flows caused by an inter-basin transfer scheme. There are opportunities... -
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,... -
Does reservoir trophic status influence the feeding and growth of the sharptooth catfish, Clarias gariepinus (Teleostei: Clariidae)?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: WM Potts T Hecht TG AndrewThe diet and growth of sharptooth catfish, Clarias gariepinus, in an oligotrophic system (Kat River Reservoir, Eastern Cape, South Africa) were compared to those in a eutrophic system (Laing Reservoir, Eastern Cape) to determine if the trophic status of a... -
Growth of market-size abalone (Haliotis midae) fed kelp (Ecklonia maxima) versus a low-protein commercial feed
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TL Francis GW Maneveldt J VenterThe growth of grow-out abalone fed on kelp, with c. 10 % dry weight protein content, was compared with that of those fed on 'Feed A' (a new low-protein commercial feed of c. 26 % protein), in a flow-through system... -
Macroinvertebrate assemblages as biological indicators of water quality in the Moiben River, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FO Masese M Muchiri PO RaburuBenthic macroinvertebrate assemblages at eight stations in the Moiben River, corresponding to different catchment land uses, were assessed in 2006 as indicators of water quality. The relative abundance per taxon, diversity index, richness index, evenness, dominance, percentage of five dominant... -
The role of macroinvertebrates in the diets of the dominant fish species in Lake Nokoué, Benin
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: P Gnohossou --- Laboratoire d'Hydrobiologie et d'Aquaculture, P Laleye --- Laboratoire d'Hydrobiologie et d'Aquaculture, P Atachi --- Laboratoire d'Hydrobiologie et d'Aquaculture, J Moreau --- Laboratoire d’Agronomie, Environnement et Écotoxicologie, FranceBetween 2003 and 2006 the diets of 22 fish species, comprising approximately 90% of the Lake Nokoué fish biomass, were analysed. Macroinvertebrates dominated the diet of ten species, fishes were the preferential prey of six fish species, and detritus and... -
Zooplankton composition, abundance and distribution in selected south and west coast estuaries in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PH Montoya-Maya --- Department of Ichthyology and Fisheries Science, South Africa NA Strydom --- , South AfricaIn order to contribute to the understanding of estuarine zooplankton dynamics in cool-temperate systems, zooplankton samples were collected by plankton tows, using two modified WP2 nets, in nine estuaries on the south and west coasts of South Africa, seasonally between... -
Application of a direct toxicity assessment approach to assess the hazard of potential pesticide exposure at selected sites on the Crocodile and Magalies rivers, South Africa
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 AfricaThe potentially hazardous effects of agricultural pesticide usage in the Crocodile (west) Marico catchment were evaluated using the Danio rerio and Daphnia pulex lethality, Selenastrum capricornutum growth inhibition and the Ames mutagenicity plate incorporation assays. Hazard assessment categories are proposed... -
The impact of feedlot effluent on water quality and aquatic macroinvertebrate community structure in streams of the upper Vaal River catchment, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M-N Jonker --- Centre for Aquatic Research, Department of Zoology, South Africa JHJ van Vuren --- Centre for Aquatic Research, Department of Zoology, South Africa V Wepener --- Centre for Aquatic Research, Department of Zoology, South AfricaThe impact of three intensive feedlots on aquatic macroinvertebrate community structure under high and low flows in the upper Vaal catchment was investigated. Water quality variables recorded upstream and downstream of feedlot activity include pH, dissolved oxygen, conductivity, temperature, turbidity,... -
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... -
Assessment of the charter-boat fishery in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Pradervand R van der ElstThe South African KwaZulu-Natal charter-boat fishery was assessed by means of a socio-economic questionnaire survey and catch inspections during the period August 2003–November 2004. In all, 38 charter operators were interviewed and 135 catch inspections undertaken. Of a total of... -
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... -
The impact of indigenous ungulate herbivory over five years (2004–2008) on the vegetation of the Little Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MT Hoffman --- Plant Conservation Unit, Botany Department, South Africa CF Madden --- Plant Conservation Unit, Botany Department, South Africa K Erasmus --- Sanbona Wildlife Reserve, South Africa N Saayman --- Department of Agriculture: Western Cape, South Africa JC Botha --- Department of Agriculture: Western Cape, South AfricaThis study investigated the impact of rainfall and herbivory by indigenous herbivores over five years (2004–2008) on the vegetation of the Sanbona Wildlife Reserve (SWR), a 54 000 ha privately owned conservation area in the Little Karoo. Changes in floristic... -
Nitrogen uptake of a perennial ryegrass–white clover pasture following strategic nitrogen fertiliser application during the cool seasons in the Western Cape province, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J Labuschagne MB Hardy GA AgenbagThe effect of four fertiliser nitrogen (N) levels (0, 50, 100 or 150 kg N ha−1) applied as a single dressing in either autumn (late April), early winter (early June), late winter (mid July), early spring (late August) or late... -
Different responses of Eragrostis curvula and Themeda triandra to rapid- and slow-release fertilisers: insights into their ecology and implications for fertiliser selection in pot experiments
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: RWS Fynn J NaikenIn a pot experiment, we examined the response of Eragrostis curvula and Themeda triandra to 0, 15, 30 and 60 g m−2 of nitrogen (N) supplied either as a rapid-release fertiliser (Sasol Nitro NPK) or a slow-release fertiliser (Plantacote Plus)... -
Pairings of Sheaves of A-Modules
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Anastasios Mallios PatriceP. NtumbaIt is proved that for any free A-modules F and ε of finite rank on some C-algebraized space (X,A) a degenerate A-bilinear morphism Φ : F × ε → A induces a non-degenerate A-bilinear morphism Φ : F/ε ⊥ ×... -
Effect of water trophic level on the impact of the water hyacinth moth Niphograpta albiguttalis on Eichhornia crassipes
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Canavan --- Department of Zoology and Entomology, South Africa JA Coetzee --- Department of Zoology and Entomology, South Africa MP Hill --- Department of Zoology and Entomology, South Africa ID Paterson --- Department of Zoology and Entomology, South AfricaEutrophication contributes to the proliferation of alien invasive weed species such as water hyacinth Eichhornia crassipes. Although the South American moth Niphograpta albiguttalis was released in South Africa in 1990 as a biological control agent against water hyacinth, no post-release... -
Water temperature affects life-cycle duration of tadpoles of Natal cascade frog
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- Centre for Water Resources Research, South Africa RJ Karssing --- Ezemvelo KZN Wildlife, South AfricaDirect and indirect effects of climate change on amphibians include range shifts and changes in community structure. The Natal cascade frog Hadromophryne natalensis has an altitudinal range of some 2 400 m in KwaZulu-Natal, and presents an opportunity to assess... -
Influence of selected abiotic factors on aquatic macroinvertebrate assemblages in the Olifants River catchment, Mpumalanga, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Kemp --- Unit for Environmental Sciences and Management, South Africa KN de Kock --- Unit for Environmental Sciences and Management, South Africa V Wepener --- Unit for Environmental Sciences and Management, South Africa W Roets --- Unit for Environmental Sciences and Management, South Africa L Quinn --- Unit for Environmental Sciences and Management, South Africa CT Wolmarans --- Unit for Environmental Sciences and Management, South AfricaBiodiversity is frequently seen as an indicator of ecological health. Therefore a survey of the macroinvertebrates of the Olifants River, one of the most polluted rivers in South Africa, was conducted in 2010–2011. Four surveys were conducted at a total... -
Hypertriglyceridaemia: Aetiology, Complications and Management
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: DJ Blom --- Division of Lipidology, Department of Medicine,The bulk of plasma triglycerides are carried by chylomicrons in the fed and very low-density lipoproteins in the fasted state. These triglyceride-rich lipoproteins are metabolised to remnant lipoproteins by lipoprotein lipase (LPL). Hypertriglyceridaemia results if triglyceride-rich lipoproteins accumulate either due... -
Continuous measurement of heart rate variability following carbon dioxide pneumoperitoneum during nitrous oxide/sevoflurane anaesthesia
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: S Kurashige --- Department of Anesthesiology, Japan K Takakura --- Department of Anesthesiology, Japan M Mizogami --- Department of Anesthesiology, JapanBackground: Previous studies of autonomic nervous system activity through analysis of heart rate variability (HRV) have demonstrated increased sympathetic activity during positive-pressure pneumoperitoneum. We employed an online, continuous method for rapid HRV analysis (MemCalc™, Tarawa, Suwa Trust, Tokyo, Japan) to... -
Blood is thicker than water: coagulation challenges in the perioperative period
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: P Motshabi Chakane --- Department of Anaesthesia,This manuscript serves to highlight some novel approaches to perioperative coagulation abnormalities and to address unanswered questions. -
Are lung-protective ventilation strategies worth the effort?
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: P Slinger --- University of Toronto,Nonphysiological ventilation in healthy lungs induces acute lung injury (ALI). Protective lung ventilation in patients with ALI improves outcome. Protective lung ventilation in noninjured lungs and in the absence of a primary pulmonary insult may initiate ventilation-induced lung injury (VILI),... -
Perioperative care of an infant with pyruvate dehydrogenase deficiency
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: E Dewhirst --- Research Fellow, Department of Anaesthesiology and Pain Medicine, S Rehman --- Department of Anaesthesiology and Pain Medicine, JD Tobias --- Chairman, Department of Anaesthesiology and Pain Medicine,The authors present the anaesthetic management of two infants with pyruvate dehydrogenase complex deficiency (PDCD), a rare genetic disorder of carbohydrate metabolism leading to lactic acidosis and neurological impairment. In the first case, a seven-month-old infant, undergoing closed reduction of... -
Confidentiality and Privacy: What is the difference?
Item type: Journal Article • Journal: South African Family Practice • Authors: Knapp D van Bogaert --- Steve Biko Centre for Bioethics, Faculty of Health Sciences, GA Ogunbanjo --- Department of Family Medicine and PHC, Faculty of Health Sciences,In the practice of medicine, the idea of confidentiality is articulated in almost all its oaths, guidelines and codes. Dating at least as far back to the Hippocratics, swearing that “… What I may see or hear in the course... -
Rising rates of Caesarean sections: an audit of Caesarean sections in a specialist private practice
Item type: Journal Article • Journal: South African Family Practice • Authors: N Naidoo --- Department of Obstetrics and Gynaecology, J Moodley --- Women's Health and HIV Research Group,Background: Caesarean section (CS) rates are increasing worldwide; rates in the private sector in South Africa are reported to be particularly high. To the best of our knowledge there has been no recent audit of Caesarean sections performed by the... -
Suicide cases investigated at the state mortuary in Bloemfontein, 2003–2007
Item type: Journal Article • Journal: South African Family Practice • Authors: K Stark --- Department of Forensic Medicine, Faculty of Health Sciences, G Joubert --- Department of Biostatistics, Faculty of Health Sciences, M Struwig --- Faculty of Health Sciences, M Pretorius --- Faculty of Health Sciences, Merwe N Van der H Botha J Kotzé D KrynauwBackground: Up to 8 000 South Africans commit suicide annually. This study aimed to investigate the profile of suicide cases in Bloemfontein and the southern Free State province. -
Hypertriglyceridaemia: Aetiology, complications and management
Item type: Journal Article • Journal: South African Family Practice • Authors: DJ Blom --- Division of Lipidology, Department of Medicine,The bulk of plasma triglycerides is carried by chylomicrons in the fed and very low density lipoproteins in the fasted state. These triglyceride-rich lipoproteins are metabolised to remnant lipoproteins by lipoprotein lipase. Hypertriglyceridaemia results if triglyceride-rich lipoproteins accumulate either due... -
The development, implementation and evaluation of a short course in objective structured clinical examination (OSCE) skills
Item type: Journal Article • Journal: South African Family Practice • Authors: A De Villiers --- Centre for Health Sciences Education, Faculty of Health Sciences, E Archer --- Centre for Health Sciences Education, Faculty of Health Sciences,Background: Objective structured clinical examination (OSCE) examiner training is widely employed to address some of the reliability and validity issues that accompany the use of this assessment tool. An OSCE skills course was developed and implemented at the Stellenbosch Faculty... -
Microalbuminuria and estimated glomerular filtration rate
Item type: Journal Article • Journal: South African Family Practice • Authors: Y Veriava --- School of Clinical Medicine,Hypertension and diabetes mellitus are the major causes of renal damage and cardiovascular events. The co-existence of these conditions further increases the risk of progressive renal disease, cardiovascular events, and mortality. Urinary excretion of albumin, even in small amounts, and... -
Management of mild to moderate acne vulgaris
Item type: Journal Article • Journal: South African Family Practice • Authors: P Malahlela --- Department of Dermatology, MH Motswaledi --- Department of Dermatology,Acne is a chronic inflammatory disease of the pilosebaceous units. It is the most common diagnosis in dermatology and regularly affects adolescents and young adults. Acne can be mild, moderate or severe. Treatment includes topical keratolytics, topical retinoids, antibiotics, hormonal... -
A medical audit of the management of cryptococcal meningitis in HIV-positive patients in the Cape Winelands (East) district, Western Cape
Item type: Journal Article • Journal: South African Family Practice • Authors: KB Von Pressentin --- Langeberg Sub-District, Cape Winelands District, HH Conradie --- Division of Family Medicine and Primary Care, Faculty of Medicine and Health Sciences, R Mash --- Division of Family Medicine and Primary Care, Faculty of Medicine and Health Sciences,Background: Cryptococcal meningitis (CM) has become the most common type of community-acquired meningitis. CM has a poor outcome if the initial in-hospital treatment does not adhere to standard guidelines. The aim of this audit was to improve the quality of... -
Using fourth-year medical students' reflections to propose strategies for primary care physicians, who host students in their practices, to optimise learning opportunities
Item type: Journal Article • Journal: South African Family Practice • Authors: M Van Rooyen --- Department of Family Medicine,Setting and subjects: Fourth-year medical students at the University of Pretoria are required to work with a primary healthcare practitioner for two weeks. After the preceptorship, reflective photo-story reports on the students' experiences and personal and academic growth are submitted. -
Gouty arthritis: an approach for general practice
Item type: Journal Article • Journal: South African Family Practice • Authors: M Tikly --- Division of Rheumatology, K Makan --- Division of Rheumatology,Gout is a common crystal-induced inflammatory arthritis, the prevalence and clinical complexity of which is increasing in the face of a growing aged population with multiple co-morbidities. Recent epidemiological studies emphasise that lifestyle factors strongly influence the development of hyperuricaemia... -
Effects of plantation residue management on the community structure of wattle regeneration invertebrate pests in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Prem Govender --- Research Directorate, Faculty of Health Sciences, South AfricaThere is a limited availability of land for the expansion of South African black wattle plantations. One way to increase productivity is to ensure the survival of seedlings during regeneration, thereby increasing the stocking of compartments. Soil invertebrate pests constitute... -
Macroinvertebrate distributions in relation to human and animal-induced physical disturbance of the sediment surface in two Kenyan tropical Rift Valley streams
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CM M'Erimba --- Department of Biological Sciences, Kenya JM Mathooko --- Global Research Akademik and Mentoring Services, Kenya KO Ouma --- Department of Biological Sciences, KenyaA study of macroinvertebrate distribution in relation to different levels of human and animal physical disturbance of the sediments of the Njoro (highly disturbed) and Ellegirini (less disturbed) rivers was conducted from October 2001 to June 2002, and again in... -
Satellite tracking of a young Steppe Eagle from the United Arab Emirates during two spring and autumn migrations
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Sàlim Javed --- Environment Agency – Abu Dhabi, United Arab Emirates Shahid Khan --- Environment Agency – Abu Dhabi, United Arab Emirates Junid Nazeer --- Environment Agency – Abu Dhabi, United Arab Emirates Shakeel Ahmed --- Environment Agency – Abu Dhabi, United Arab Emirates Abdullah Al Hammadi --- Environment Agency – Abu Dhabi, United Arab Emirates Eissa Al Hammadi --- Environment Agency – Abu Dhabi, United Arab EmiratesFollowing recovery and successful rehabilitation, a young Steppe Eagle Aquila nipalensis was tagged with a 45 g GPS satellite transmitter to track its migration and identify potential wintering and summering areas of the species passing through the United Arab Emirates... -
Adopting latecomers' strategies for the development of renewable energy technology in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria Oluwatosin G Oladipo --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria Ibikunle O Ogundari --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria O Titilayo Aladesanmi --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, NigeriaThe overall objective of this paper is to develop strategies on how renewable energy technology could be used to abate climate change impacts in Africa. While assessing the potential impacts of climate change in Africa, the paper asserts that renewable... -
Europe's long history of extracting African renewable energy: Contexts for African scientists, technologists, innovators and policy-makers
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kate B. Showers --- Centre for World Environmental History, United KingdomHaving failed to identify local energy supplies compliant with Kyoto Protocol obligations, the EU turned to Africa in the 21st C. According to definition, the term ‘renewable energy’ source equally describes slaves, forests and rivers. Environmental history analysis demonstrates the... -
Growth and structural change in Africa: development strategies for the learning economy
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bengt-Åke Lundvall --- Department of Management and Business Studies, Denmark Rasmus Lema --- Department of Management and Business Studies, DenmarkThis paper discusses opportunities and policy options for African countries seeking innovation and learning based development strategies. What kind of policies and institutions are necessary in order to transform the current increase in rents from commodities exports into industrial investment... -
Murder and the whole city
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Kelly Gillespie --- Department of Anthropology, South AfricaHenri Lefebvre's The Urban Revolution makes a claim for the importance of seeing the whole urban form in our analyses of cities. He argues that we too often get trapped into a view of the urban that prioritises “fragments” of... -
Can δ15N and δ13C stable isotopes and fatty acid signatures indicate changes in phytobenthos composition on an artificial substrate?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Dalu --- Department of Zoology and Entomology, South Africa PW Froneman --- Department of Zoology and Entomology, South AfricaTemporal changes in fatty acid composition and δ15N, δ13C stable isotope values of the phytobenthos growing on artificial clay substrates under natural conditions over a 28-day period at an upstream and a downstream site in the Kowie River near Grahamstown... -
Do SASS5 scores vary with season in the South African highveld? A case study on the Skeerpoort River, North West province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HE Fourie --- Department of Zoology and Entomology, South Africa C Thirion --- Department of Water Affairs: Resource Quality Services, South Africa CW Weldon --- Department of Zoology and Entomology, South AfricaMacroinvertebrate assemblages can vary with season as a result of changing environmental conditions and phenology of individual species. The objective of this study was to determine whether results from the South African Scoring System version 5 (SASS5) are affected by... -
The experiences of people living with HIV/AIDS in Gaborone, Botswana: stigma, its consequences and coping mechanisms
Item type: Journal Article • Journal: South African Family Practice • Authors: Vincent Setlhare --- Department of Family Medicine, Botswana Anne Wright --- Department of Family Medicine, South Africa Ian Couper --- Department of Family Medicine, South AfricaBackground: This study was carried out in Bontleng, Extension 14 and Old Naledi, which are low-income residential areas of Gaborone, Botswana. The aim of the study was to explore the experiences of people living with human immunodeficiency virus/acquired immune deficiency... -
Content analysis of food advertising strategies and ethical implications on South African television
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- Mahidol University, Thailand Karl Peltzer --- University of Limpopo, South AfricaThe study aimed to investigate strategies and ethical implications of food advertising in South African television. The sample included 343 food advertisements recorded over two weeks and 224 hours from two major South African TV channels. Results indicate 45 products... -
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... -
Morphological identification of the ryegrass hybrid Lolium multiflorum × Lolium perenne and isolation of the pathogen Fusarium pseudograminearum in the Western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael I Ferreira --- Plant Science, Western Cape Department of Agriculture, South Africa Carl F Reinhardt --- Department of Plant Production and Soil Science, South Africa Sandra C Lamprecht --- Agricultural Research Council–Plant Protection Research Institute, South Africa Marna Sinclair --- Veterinary Services, Western Cape Department of Agriculture, South Africa Liezl MacKenzie --- Directorate Research Support Services, Western Cape Department of Agriculture, South Africa Gert van Coller --- Plant Science, Western Cape Department of Agriculture, South AfricaWeed resistance to herbicides present one of the greatest current economic challenges to agriculture. Herbicide resistant ryegrass (Lolium spp.) is a serious problem in Western Cape grain-producing areas. Morphological and pathogenic analyses were performed on ryegrass samples. Morphologically, 50% of... -
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... -
Rapid bioassessment of the effects of repeated rotenone treatments on invertebrate assemblages in the Rondegat River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TA Bellingan --- Department of Zoology and Entomology, South Africa DJ Woodford --- Centre for Invasion Biology, South Africa J Gouws --- Scientific Services, CapeNature, South Africa MH Villet --- Department of Zoology and Entomology, South Africa OLF Weyl --- Centre for Invasion Biology, South AfricaThe potential collateral effects of eradicating invasive fishes in streams necessitate the monitoring of invertebrate communities during treatment. In an environmental rehabilitation programme, non-native smallmouth bass were removed from the lower reaches of the Rondegat River, Western Cape, South Africa,... -
Towards a classification of Tanzanian rivers: a bioassessment and ecological management tool. A case study of the Pangani, Rufiji and Wami–Ruvu river basins
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LT Kaaya --- Department of Aquatic Sciences and Fisheries, TanzaniaRiver classification is important for reporting ecological status and for the general ecological management of river systems by partitioning natural variability. A priori river classification by abiotic variables and validation of classifications obtained using aquatic macroinvertebrates from reference sites for... -
Population dynamics and biology of an invasive population of mosquitofish Gambusia affinis in a temperate estuarine lake system
Item type: Journal Article • Journal: African Zoology • Authors: Hans Sloterdijk --- Leibniz Center for Tropical Marine Ecology, Germany Nicola C James --- South African Institute for Aquatic Biodiversity, South Africa M Kyle S Smith --- South African National Parks, Rondevlei Scientific Services, South Africa Werner Ekau --- Leibniz Center for Tropical Marine Ecology, Germany Olaf LF Weyl --- South African Institute for Aquatic Biodiversity, South AfricaThis study investigates the distribution, relative abundance, population growth and biology of the alien invasive fish Gambusia affinis in the Wilderness Lakes System, a coastal lake system in the warm-temperate region of South Africa. Fish were collected throughout the system... -
Effect of burn area on invertebrate recolonization in grasslands in the Drakensberg, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Charmaine Uys --- University of KwaZulu-Natal, South Africa Michelle Hamer --- University of KwaZulu-Natal, South Africa Robert Slotow --- University of KwaZulu-Natal, South AfricaOur study examined the short-term response of grassland invertebrate communities to fire in the South African Drakensberg, in relation to distance from the edge of a burn. We aimed to establish which species survive fire and the dynamics of the... -
Assessment of the macro-invertebrate fauna of rivers in southern Nigeria
Item type: Journal Article • Journal: African Zoology • Authors: J. O. Olomukoro --- Department of Animal and Environmental Biology, Nigeria L. I. N. Ezemonye --- Department of Animal and Environmental Biology, NigeriaThis study evaluated the macro-invertebrate fauna in water bodies of southern Nigeria spanning the rainforest and derived savanna ecozones. The benthic macro-invertebrate fauna of Edo Ecozone comprises 55 taxa, belonging to 13 major groups. The abundance of major taxonomic groups... -
Patterns of millipede (Diplopoda), centipede (Chilopoda) and scorpion (Scorpionida) diversity in savanna habitats within the Greater Makalali Conservancy, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Dave Druce --- University of KwaZulu-Natal, South Africa Michelle Hamer --- University of KwaZulu-Natal, South Africa Rob Slotow --- University of KwaZulu-Natal, South AfricaAlthough savanna is one of the most important biomes in southern Africa, it is, apart from the botanical component, one of the least studied. This study aimed to document the distribution patterns, richness and diversity of selected ground-dwelling, flightless arthropods... -
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... -
Habitat preferences of three sympatric lacertid lizards in the arid Tankwa Karoo Basin of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: I. J. du Plessis --- Department of Botany and Zoology, South Africa P. le F. N. Mouton --- Department of Botany and Zoology, South AfricaFour lacertid lizards, Pedioplanis laticeps, P. lineo-ocellata, Meroles knoxii and Nucras tessellata, occur sympatrically on the arid plains of the Tankwa Karoo Basin in South Africa. The aim of this study was to determine whether the four species are spatially... -
Trophic structure and biomass distribution of macrobenthos on sheltered and semi-exposed rocky shores of Tsitsikamma Marine Protected Area
Item type: Journal Article • Journal: African Zoology • Authors: Nicholas Hanekom --- South African National Parks, South AfricaThe trophic structure and biomass of macrobenthos on both wave-sheltered, rocky intertidal shores and semi-exposed ones at seven localities in the Tsitsikamma Marine Protected Area were compared. In the Cochlear zone and entire intertidal (Cochlear- and Balanoid zones combined) biomass... -
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... -
Genetic variation in the Critically Endangered velvet worm Opisthopatus roseus (Onychophora: Peripatopsidae)
Item type: Journal Article • Journal: African Zoology • Authors: Savel R. Daniels --- Department of Botany and Zoology, South AfricaIn the present study the genetic variation of the Critically Endangered velvet worm species Opisthopatus roseus is examined. This species is endemic to the Ngele mistbelt forest in the KwaZulu-Natal province of South Africa. In recent years the forest has... -
Spatial and temporal variation in cadmium body loads of four intertidal invertebrates from False Bay, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: A.J. Reinecke --- Department of Botany and Zoology, South Africa N.P. Mdzeke --- Department of Botany and Zoology, South Africa S.A. Reinecke --- Department of Botany and Zoology, South AfricaIncreasing urbanization and industrialization along the coastal areas of False Bay in South Africa can endanger coastal ecosystems because of increasing metal pollution. To obtain baseline data on contamination levels in the intertidal zone, cadmium (Cd) body loads of four... -
Life history strategy and population characteristics of an unexploited riverine cyprinid, Labeo capensis, in the largest impoundment in the Orange River Basin
Item type: Journal Article • Journal: African Zoology • Authors: Henning Winker --- Department of Ichthyology and Fisheries Science, South Africa Olaf L.F. Weyl --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa Anthony J. Booth --- Department of Ichthyology and Fisheries Science, South Africa Bruce R. Ellender --- Department of Ichthyology and Fisheries Science, South AfricaThe life history of an endemic riverine African cyprinid, Labeo capensis, that dominates the larger ichthyofauna in a large impoundment in the Orange River Basin four decades after damming, was investigated. Both sexes grew at a similar rate until the... -
Foraging strategies of coexisting lacertid lizards in the arid Tankwa Karoo Basin of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: I.J. du Plessis --- Department of Botany and Zoology, South Africa P. le F.N. Mouton --- Department of Botany and Zoology, South AfricaFour lacertid lizards, Pedioplanis laticeps, P. lineo-ocellata, Meroles knoxii and Nucras tessellata, occur sympatrically on the arid plains of the Tankwa Karoo Basin in South Africa. The aim of this study was to evaluate the significance of foraging strategy in... -
Freshwater invertebrates of sub-Antarctic Marion Island
Item type: Journal Article • Journal: African Zoology • Authors: Herbert J.G. Dartnall --- Department of Biological Sciences, Australia Valdon R. Smith --- Department of Botany and Zoology, South AfricaThe freshwater habitats (mires, streams, lakes, pools and wallows) on sub-Antarctic Marion Island were examined for invertebrates. Sixty-eight species were found, including 45 new records for the Island. Of these 56 were bona fide aquatic invertebrates, the rest being terrestrial... -
Determining adrenocortical activity as a measure of stress in African buffalo (Syncerus caffer) based on faecal analysis
Item type: Journal Article • Journal: African Zoology • Authors: A. Ganswindt --- Mammal Research Institute, Department of Zoology and Entomology, South Africa A.S.W. Tordiffe --- National Zoological Gardens of South Africa, South Africa E. Stam --- Mammal Research Institute, Department of Zoology and Entomology, South Africa M.J. Howitt --- National Zoological Gardens of South Africa, South Africa F. Jori --- Mammal Research Institute, Department of Zoology and Entomology, South AfricaLittle is known about the levels of stress experienced by African buffalos affected by injury, disease, or socio-ecological and anthropogenic factors. To be able to start filling this gap, we examined the suitability of two 11-oxoaetiocholanolone enzyme-immunoassays (EIAs) detecting 11,17... -
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... -
Confinement lowers fertility rate of helmeted guinea fowl (Numida meleagris) eggs
Item type: Journal Article • Journal: African Zoology • Authors: Dennis M. Kimata --- School of Biological Sciences, University of Nairobi, Kenya Richard W. Mwangi --- School of Biological Sciences, University of Nairobi, Kenya Peter M. Mathiu --- Department of Veterinary Anatomy and Physiology, KenyaGuinea fowl is a common game bird in Africa and there have been efforts to domesticate it for use as a source of human food. An important obstacle in successful domestication of guinea fowl is their low fertility rate.We studied... -
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... -
Response rate on the Adjusted Rorschach Comprehensive System (ARCS) by isiXhosa learners: a replication and extension
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Mokgadi Moletsane --- Department of Educational Psychology, South Africa Robert Kananga Mukuna --- Department of Educational Psychology, South AfricaThis study describes the response profiles of a sample of isiXhosa learners regarding to the Adjusted Rorschach Comprehensive System (ARCS) and related influences to explain the response latencies. This was a multiple case study in which six test naive high... -
Psychosocial issues among children and adolescents in an integrated paediatric HIV psychology service in Botswana
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Lindsay E. Mullan --- Fielding Graduate University, USA Paul C. Mullan --- Children's National Health System, USA Gabriel M. Anabwani --- Botswana-Baylor Children's Clinical Centre of Excellence, BotswanaThis study explored the psychosocial issues faced by children and adolescents with HIV in Botswana. Data on psychosocial issues were collected from 27 young children aged 5–9 years and 128 adolescents aged 10–19 years (n = 155). Data were analysed... -
Shoebill Balaeniceps rex foraging behaviour in the Bangweulu Wetlands, Zambia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ralf HE Mullers --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Arjun Amar --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaShoebills (Balaeniceps rex) are endemic to large, well-vegetated wetlands in central-eastern Africa. Populations are believed to be declining throughout their range and knowledge about their ecology, behaviour and distribution is vital for their effective conservation. In this study we quantified... -
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... -
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... -
Modelling of product demand as a pointer tool for choice of maintenance strategy
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Michael Kanisuru Adeyeri --- Department of Industrial Engineering, South Africa Khumbulani Mpofu --- Department of Industrial Engineering, South Africa Buliaminu Kareem --- Department of Mechanical Engineering, NigeriaThe purpose of this paper is to use product demand or sales turnout of products in a competitive environment as an indicator to suggest maintenance strategies for machinery. The model takes account of singular products from several companies or industries,... -
Agency theory, insider ownership and corporate focus: some South African evidence
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: S Davidson --- Department of Economics and Finance, AustraliaIt is widely believed that unbundling will immediately add value to shareholders. This paper investigates the basis for this belief. It is contended that the benefits of unbundling are not based on the US experience of corporate refocussing. In the... -
Price earnings ratios on the Johannesburg Stock Exchange - Are they a guide to value?
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: G D I Barr --- Department of Statistical Science and Economics, B S Kantor --- Department of Economics,This paper tests whether there is an equilibrium relationship between prices and earnings on the Johannesburg Stock Exchange (JSE). Such a relationship would hold if the JSE Index and index earnings were cointegrated, A full explanation of the technique of... -
The effect of STC on earnings retention
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: M Graham --- Department of Accounting,The objective of this study is to determine whether or not the introduction of STC has resulted in South African companies retaining a greater amount of their earnings than prior to the introduction of STC. A statistical analysis of retention... -
Factors influencing credit assessment
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: M Ward --- Wits Business School, Graduate School of Business Administration,This study examines the perceptions of credit analysts on which factors determine credit risk. A sample drawn from the major international credit underwriters was used to rank a previously derived set of micro-economic variables in terms of their importance as... -
Environmental disclosure in annual reports: A legitimacy theory perspective
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: A Savage --- Assistant Professor of Accounting, United States of America E Gilbert --- Professor of Organisational Behaviour, Canada J Rowlands --- Professor of Accounting, South Africa A J Cataldo --- Assistant Professor of Accounting, United States of AmericaIn recent years, corporations have increasingly used their annual reports to voluntarily disclose information relating to their social actions, particularly those concerning the natural environment. The conventional accounting framework, with its emphasis on decision-usefulness, has largely proved unsatisfactory in explaining... -
Market segmentation and the cost of equity of companies listed on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: C Correia --- Department of Accounting, E Uliana --- Department of Accounting,The segmentation between the Resources/Mining and the Financial and Industrial sectors on the Johannesburg stock exchange and the relative historical dominance of the Mining sector in relation to other international markets poses questions about whether the All share data or... -
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,... -
Firm ownership structure and intellectual capital disclosures
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: S Firer --- University of the Witwatersrand, S M Williams --- Singapore Management University,The primary purpose of this study is to investigate the association between three ownership structure characteristics and voluntary intellectual capital (IC) disclosure practices. Data for this study is hand collected from the 2000 annual reports of 390 Singapore publicly traded... -
The appropriateness of performance measurement in the service sector: A case study
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: K Sartorius --- School of Accountancy, C Eitzen --- School of Accountancy, C Nicholson --- School of Accountancy,The development of performance measures in service companies has not kept abreast with their manufacturing counterparts despite the unprecedented growth of this sector in recent decades. The objective of this paper is to contribute towards a better understanding of the... -
The timing of the recognition of a liability for secondary tax on companies in accordance with international financial reporting standards
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: E R Venter --- Department of Accounting, M Stiglingh --- Department of Taxation,United States Generally Accepted Accounting Practice (“US GAAP”) generally requires taxes to be measured at the rate applicable to distributed profits, while International Financial Reporting Standards (“IFRS”) requires the undistributed rate to be used. This current conflict between US GAAP... -
Differential corporate reporting: Registered accountants’ and auditors’ views in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: L J Stainbank --- School of Accounting, M J C Wells --- School of Accounting,This paper reports the results of a postal survey of South African Registered Accountants’ and Auditors’ views on the suitability of selected South African Statements of Generally Accepted Accounting Practice to a range of South African entities varied by size,... -
Creative accounting, accounting errors, and the ability of users to detect and adjust for them
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: T Ruddy --- KPMG, Johannesburg G K Everingham --- Department of Accounting,Creative accounting refers to the various practices management use to manipulate financial statements in an effort to cause users to draw desired conclusions. The literature reveals that creative accounting is indeed practised in a number of countries, including South Africa. -
Business rescue replacing judicial management: An assessment of the extent of problems solved
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: C Lamprecht --- Department of Accounting,The South African Companies Act 46 of 1926 introduced judicial management as a statutory corporate rescue procedure for companies to be used before liquidation, where appropriate. It was retained in the South African Companies Act 61 of 1973, even though... -
Reasons for share repurchases in South Africa: Theory versus practice
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: R Chivaka --- Department of Accounting, A Siddle --- Development Bank of Southern Africa, L Bayne --- Department of Accounting, C Cairney --- Department of Accounting, J Shev --- Department of Accounting,Share repurchases (share buy-backs) have become an increasing global phenomenon, with South Africa (SA) following the international trends since 1999. While there has been a significant amount of international research concerning share repurchases, the same is not true of SA... -
An analysis of audit committee responsibilities and disclosure practices at large listed companies in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: B Marx --- Department of Accountancy,Audit committees traditionally focused on oversight of the financial reporting process with the aim of ensuring that accurate, credible and reliable financial reporting is provided to the shareholders. The role and responsibilities of the audit committee have evolved, however, and... -
An exploratory analysis of stakeholders’ expectations and perceptions of corporate social and environmental reporting in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: C G Mitchell --- Department of Accounting, T R Hill --- School of Environmental Science,This paper presents the results of a study that surveyed South African stakeholders of corporate social and environmental reporting to assess their perceptions of what businesses should be reporting, and how effectively they perceive it is being reported. Evidence was... -
Sustainability reporting at large public sector entities in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: B Marx --- Department of Accountancy, V van Dyk --- Department of Accountancy,Public sector entities are central to the delivery of sustainable development, and every aspect of their role shapes how people live their lives. This, together with the fact that they are under constant and growing pressure to operate in an... -
The relationship between devoted study time and auditing learning approaches followed by prospective chartered accountants in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: K Barac --- Department of Auditing,Learning approaches in accounting, distinguishing between deep, surface and strategic approaches, have been researched in several countries other than South Africa. The study reported in this article provided a South African perspective by investigating the auditing learning approaches of prospective... -
The corporate use of derivatives: a survey of South Africa’s large listed non-financial firms
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: C Correia --- College of Accounting, G Holman --- Department of Finance and Tax, A Jahreskog --- College of Accounting,This paper presents the results of a comparative questionnaire survey of derivative use by South African companies. The objective was to determine the extent of derivative use and to examine how and why companies use derivatives. Derivative use by South... -
An evaluation of an exploratory intervention to improve progression in a first-year accounting course
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: J Winfield --- College of Accounting, J Luyt --- Education Development Unit,South African universities face pressure to increase the throughput of accounting students, with a special emphasis on expanding the number of female and black graduates. To improve the progression of at-risk first-year second-semester accounting students, an intervention known as JumpStart... -
Sustainability in accounting education: An analysis of the teaching thereof at accredited South African universities
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: B Marx --- Department of Accountancy, A van der Watt --- Department of Accountancy,Accountants and auditors are key role players in the financial world and society at large and as such can play a vital role in fostering awareness of sustainability and creating sustainable business practices. The issue of sustainability in accounting education... -
Factors influencing corporate governance disclosure of companies listed on the Alternative Exchange (AltX) in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Henriëtte Scholtz --- School of Accountancy, South Africa Anna-Retha Smit --- Department of Taxation, South AfricaThis article examines the various factors that influence the level of conformance with corporate governance recommendations for companies listed on the Alternative Exchange (AltX) in South Africa. To achieve this objective, a corporate governance disclosure index was developed by examining... -
A comment on “Portfolio rebalancing in South Africa”
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: David Bradfield --- Department of Statistical Sciences, South Africa Graham Barr --- Department of Economics and Department of Statistical Sciences, South AfricaIn this comment we add to the discussion on rebalancing portfolios by Sher and Barr (2011). In particular we highlight how a recent rebalancing proposal by Chan and Ramkumar (2011) is found to significantly improve rebalancing performance. An important feature... -
An analysis of corporate governance and company performance: a South African perspective
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Hamutyinei Harvey Pamburai --- Department of Finance & Tax, South Africa Eddie Chamisa --- Department of Finance & Tax, South Africa Cader Abdulla --- Department of Finance & Tax, South Africa Colin Smith --- Department of Finance & Tax, South AfricaThis study examines the relationship between corporate governance mechanisms and company performance as measured by economic value added (EVA), return on assets (ROA) and Tobin's Q. A multiple regression model is used to compare the association between corporate governance mechanisms... -
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... -
A Multi-directional model for identifying information system opportunities
Item type: Journal Article • Journal: De Ratione • Authors: P.M.Q. Lay --- University of Cape Town,Information Technology has a pervasive influence in business, from supporting the operations of the organization, to making a significant contribution to the competitive strategy of the enterprise. Identifying new opportunities for IT support is a major aspect of planning for... -
An evaluation of corporate ownership structures on employee, management and shareholder compensation for JSE companies
Item type: Journal Article • Journal: De Ratione • Authors: T. Cohen --- H. Tarley and Company, E. Uliana --- University of Cape Town,Where corporate ownership and control are separated, the actions of employees and managers are not completely observable by shareholders, because it is virtually Impossible for a diverse group of shareholders (the principals), to monitor the behaviour of employees and managers... -
A comparison of multivariate discriminant and logistic regression analysis in the prediction of corporate failure in South Africa
Item type: Journal Article • Journal: De Ratione • Authors: P W Court --- Rhodes University, S E Radloff --- Rhodes University,The prediction of corporate failure, based on a specific model, is of vital importance to a large body of individuals. The two statistical methodologies which enjoy prominence in the literature when establishing these models are multivariate discriminant analysis and logistic... -
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... -
Estimating the Return Parameters of the Capital Asset Pricing Model
Item type: Journal Article • Journal: De Ratione • Authors: Colin Firer --- University of the Witwatersrand,The cost of equity capital is a fundamental concept In the field of finance. Its estimation often relies on the application of the Capital Asset Pricing Model. Very little help is offered to the practitioner in the selection of appropriate... -
The Discount to Net Asset Value, Unbundling and Shareholder Interests
Item type: Journal Article • Journal: De Ratione • Authors: G.D.I. Barr --- School of Economics University of Cape Town, B.S. Kantor --- School of Economics University of Cape Town,The argument has recently been made by powerful political voices that the large South African corporate conglomerates (or groups) should be broken up into their constituents or “unbundled”, as the process has become known in South Africa. Critics of these... -
A review of the efficiency of the Johannesburg Stock Exchange
Item type: Journal Article • Journal: De Ratione • Authors: Narendra Bhana --- Graduate School of Business University of Durban-Westville Private Bag,In recent years there has been considerable evidence which contradicts the efficient market hypothesis. This evidence is reviewed with particular attention to the JSE, The efficiency of the JSE is evaluated by using an efficiency scale which ranges from perfect... -
A review of renal protection strategies
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Erna Meyer --- Northland District Health Board, Whangarei Base Hospital, New ZealandGlobally, more than 10 million people are affected every year by acute kidney injury (AKI) and approximately 6% of hospital patients sustain some degree of kidney injury during their hospital event. Reducing perioperative kidney injury may significantly improve patient outcomes... -
Benthic macroinvertebrate assemblage composition and distribution pattern in the upper Mthatha River, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AS Niba --- Department of Biological and Environmental Science, South Africa SP Mafereka --- Department of Biological and Environmental Science, South AfricaBenthic macroinvertebrates were sampled and environmental variables measured at Langeni Forest and Kambi Valley, two sites of varying degrees of human impact in the upper Mthatha River, South Africa, in 2010–2011. Four species, Simulium adersi Pomeroy, Baetis harrisoni Barnard, Pseudocloeon... -
Aquatic macroinvertebrate responses to pollution of the Boesmanspruit river system above Carolina, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RB Tate --- Digby Wells Environmental, South Africa A Husted --- Digby Wells Environmental, South AfricaThe upper Boesmanspruit river system received much attention in 2012 when a pollution event in January rendered the drinking water of the town of Carolina non-potable. The responses of aquatic macroinvertebrate assemblages in the upper Boesmanspruit system to that event... -
Tanzania River Scoring System (TARISS): a macroinvertebrate-based biotic index for rapid bioassessment of rivers
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LT Kaaya --- Department of Aquatic Sciences and Fisheries, Tanzania JA Day --- Department of Biological Sciences, South Africa HF Dallas --- Department of Botany, South AfricaThe biological assessment of rivers using aquatic macroinvertebrates is an internationally recognised approach for the determination of riverine ecological conditions. In this study a Tanzanian macroinvertebrate-based biotic method, Tanzania River Scoring System (TARISS), was developed in 2012, based on the... -
The role of employee wellness programme in the hospitality industry: a review of concepts, research, and practice
Item type: Journal Article • Journal: • Authors: Tingting (Christina) Zhang --- Department of Human Sciences, Ohio State University, Columbus, Ohio, USA Jay Kandampully --- Department of Human Sciences, Ohio State University, Columbus, Ohio, USA Hye Yoon Choi --- Department of Human Sciences, Ohio State University, Columbus, Ohio, USAIn the hospitality industry, employees are critical to firm success, through their intimate interactions with customers to create memorable experiences and relationships. A nascent strategy adopted by many hospitality firms seeks to increase employee engagement and commitment through employee wellness programmes. Despite... -
The conflict between industry hosts and master’s degree students’ expectations on students entering the hospitality industry
Item type: Journal Article • Journal: • Authors: Rajka Presbury --- Blue Mountains International Hotel School, Sydney, Australia Janette Illingsworth --- Blue Mountains International Hotel School, Sydney, Australia Scott Richardson --- Blue Mountains International Hotel School, Sydney, AustraliaThis paper reports on a qualitative study that sought to determine Australian industry hosts’ expectations and perceptions of hotel management master’s degree students on their placement in the industry, and the expectations of students when entering industry placement. The empirical dataset for... -
Grounded theory application in doctorate research
Item type: Journal Article • Journal: • Authors: Sjoerd Gehrels --- Academy of International Hospitality Research, Stenden University of Applied Sciences, Leeuwarden, The NetherlandsIn this paper a case of doctorate research methodology is presented, which can serve as contemplation for fellow researchers who are preparing their study. An interaction of reflective narrating and grounded theory methodology is applied. This approach incorporates personal and... -
To what extent are students as middle managers at a training hotel involved in strategic decision making?
Item type: Journal Article • Journal: • Authors: Tjeerd Zandberg --- Stenden University, the NetherlandsResearch has shown that middle managers can exert major upward or downward influence on their organisation’s strategy. In the practice department of our hotel school, senior students act as managers to train managerial competences. To analyse if this reflects reality,... -
The place branding of Qatar
Item type: Journal Article • Journal: • Authors: Maaike de Jong --- European Tourism Futures Institute, Stenden University, the NetherlandsDestination branding has become popular. Countries brand themselves to draw visitors and competent expatriates and to create economic diversification. The brand emphasises the uniqueness of the place; it frames the culture and sells its way of life. In the perspective... -
Employer branding: A new approach for the hospitality industry
Item type: Journal Article • Journal: • Authors: Sjoerd A Gehrels --- Stenden University of Applied Sciences, Leeuwarden, the NetherlandsThe Western hospitality industry experiences a shortage of skilled professionals due to a poor image and competition from other sectors. Employer branding, which is used as a human resources strategy to differentiate brands, has the potential to deal with some... -
The effect of an automated integrated management of childhood illness guideline on the training of professional nurses in the Western Cape, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Hilary Rhode --- Faculty of Medicine and Health Sciences, Department of Interdisciplinary Health Sciences, South Africa Bob Mash --- Faculty of Medicine and Health Sciences, Department of Interdisciplinary Health Sciences, South AfricaBackground: Reducing under-five mortality rates is a global priority. Although under-five mortality has decreased in South Africa, it is still unacceptably high. The implementation of the Integrated Management of Childhood Illness (IMCI) guideline is a key World Health Organization intervention... -
The Relationship between Competitive Strategy and Firm Performance in Micro and Small Businesses in Ghana: The Moderating Role of Managerial and Marketing Capabilities
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Moses Acquaah --- Bryan School of Business and Economics, USA Ahmed Agyapong --- KNUST Business School, GhanaThis study investigates the role of managerial and marketing capabilities in moderating the relationship between competitive strategy and firm performance using data from 581 micro and small businesses (MSBs) in Ghana. Using a hierarchical multiple regression analysis the findings indicate... -
Opportunities and challenges for empirical strategy research in Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Ronald Klingebiel --- Frankfurt School of Finance and Management, Germany Christian Stadler --- Warwick Business School, UKThis editorial complements Michael Mol and Kamel Mellahi's commentary on promising research directions by taking a look at opportunities and pitfalls in empirical research in and about Africa. It highlights some interesting examples of data sources that carry the potential... -
Africa is just like every other place, in that it is unlike any other place
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Kamel Mellahi --- Warwick Business School, UK Michael J. Mol --- Department of Strategic Management and Globalization, DenmarkIn this commentary we make a case that an increased focus on strategic management in Africa is both very timely and very necessary. We discuss existing research in this area, arguing that there is not quite enough of it and... -
Diabetic nephropathy in a tertiary care clinic in South Africa: a cross-sectional study
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: P Ngassa Piotie --- MD, DTM&H, DipPHM, MPH, Student, School of Health Systems and Public Health, Faculty of Health Sciences, DG Van Zyl --- FCP(SA), MMed(Int), MSc(ClinEpi), PhD, Senior Lecturer, Department of Internal Medicine, P Rheeder --- FCP(SA), MMed(Int), MSc(ClinEpi), PhD, Senior Lecturer, Department of Internal Medicine,Objective: The aim of this study was to determine the prevalence of micro- or macroalbuminuria in type 1 and type 2 diabetic patients, and to examine the relationship with the diabetes control parameters such as haemoglobin (Hb)A1c, blood pressure (BP)... -
Dissemination effort, innovation attributes, and variations in innovation dissemination rate
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mawuena Aggey --- Process Technology and Innovation Research, Ghana Nana Kwamina Tekyi Ghartey --- Centre for Development Studies, Ghana Charles Kweku Brown --- Centre for Development Studies, GhanaInnovation-decision type, communication channels, social system, and change agents’ promotion effort influence innovation adoption, but 49–87% of variance in adoption rates is explained by perceived innovation attributes (Rogers 1995). Relationships between adoption rates and these variables are much researched but... -
Environmental disclosure in annual reports: A legitimacy theory perspective
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: A Savage --- Oakland University, United States of America E Gilbert --- University of New Brunswick, Canada J Rowlands --- University of Port Elizabeth, South Africa AJ Cataldo --- Oakland University, United States of AmericaIn recent years, corporations have increasingly used their annual reports to voluntarily disclose information relating to their social actions, particularly those concerning the natural environment. The conventional accounting framework, with its emphasis on decision-usefulness, has largely proved unsatisfactory in explaining... -
The epistemology of AIDS in South Africa: lessons from three scenario projects
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Charl Swart --- School of Public Health, South Africa Pieter Fourie --- Department of Political Science, South AfricaThis article reviews the methodology of future scenario-building in the context of HIV and AIDS in Africa. It considers three scenario studies conducted in the past decade: UNAIDS (2005), Metropolitan Holdings (2006) and the AIDS Governance scenarios (2015). The article... -
The impact of Ready-to-Use Supplementary Food (RUSF) in targeted supplementation of children with moderate acute malnutrition (MAM) in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Liana Steenkamp --- HIV & AIDS Research Unit, South Africa Ronette Lategan --- Department of Nutrition and Dietetics, Faculty of Health Sciences, South Africa Jacques Raubenheimer --- Department of Biostatistics, Faculty of Health Sciences, South AfricaObjective: To describe catch-up growth in children with moderate acute malnutrition (MAM) on targeted supplementation using Ready-to-Use Supplementary Food (RUSF). -
Comparison of Production Performance and Tolerance to Helminthosis of Toggenburg and Norwegian Crossbred Goats Under Smallholder Production Systems in Tanzania
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: S. W. Chenyambuga --- Department of Animal Science and Production, Tanzania D. S. Shija --- Department of Animal Science and Production, Tanzania L. J. M. Kusiluka --- The Nelson Mandela African Institute of Science and Technology, Tanzania F. P. Lekule --- Department of Animal Science and Production, TanzaniaThis study was carried out to compare the growth rate, lactation performance and tolerance to gastrointestinal nematode infection of Toggenburg and Norwegian breeds in Kongwa district, Tanzania with a semi-arid environment and Mvomero district with a sub-humid environment. Milk production... -
Remuneration Committees in South African Listed Companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: D Penkin Kenneth --- Master of Commerce of the University of Cape Town in Financial Management (2009),This article examines the administration of executive compensation in listed South African companies in order to understand the background to the emotive expressions by the public concerning the amount of executive earnings. It conducts research in order to ascertain whether... -
Timeliness of Financial Reporting in Nigeria
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: U Efobi --- School of Business, P Okougbo --- School of Business,This study explored the factors that can influence the timeliness of financial reporting in Nigeria using a sample of 33 financial institutions (2005–2008). The Generalized Least Square (GLS) regression method was used for the estimation and the results reveal that... -
What factors drive fishery yields in the Lower Shire River, Malawi?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Tweddle --- South African Institute for Aquatic Biodiversity, South AfricaThe Shire River drains from Lake Malawi to the Lower Zambezi River. Annual flow is dependent mainly on lake level, partially controlled by the operation of a barrage at Liwonde to regulate flows for hydroelectricity generation in the escarpment reaches... -
Macroinvertebrate variation in endorheic depression wetlands in North West and Mpumalanga provinces, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Foster --- Department of Zoology, South Africa W Malherbe --- Water Research Group, Unit for Environmental Science and Management, South Africa M Ferreira --- Department of Zoology, South Africa JHJ van Vuren --- Department of Zoology, South AfricaAquatic macroinvertebrates are rarely used in wetland assessments due to their variation. However, in terms of biodiversity, these invertebrates form an important component of wetland fauna. Spatial and temporal variation of macroinvertebrate assemblages in endorheic depressions (locally referred to as... -
An evaluation of the weight of evidence approach to assess sediment quality in the Mvoti Estuary, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BF Shaddock --- Department of Zoology, South Africa V Wepener --- Water Research Group, Unit for Environmental Sciences and Management, South AfricaA weight of evidence approach was evaluated in the Mvoti Estuary, which is affected by point and non-point sources of contaminants. Four sites were sampled in 2005 and assessed along the standard sediment quality triad lines of evidence: sediment chemistry,... -
Plant selection and grazing activity of the invasive snail Theba pisana in coastal Algoa Bay, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Sean van Elden --- DST–NRF Research Chair in Shallow Water Ecosystems, South Africa Nelson AF Miranda --- DST–NRF Research Chair in Shallow Water Ecosystems, South Africa Renzo Perissinotto --- DST–NRF Research Chair in Shallow Water Ecosystems, South Africa Janine B Adams --- Department of Botany, South AfricaThe land snail Theba pisana is a coastal species native to the Mediterranean but has been introduced to regions all over the world, including South Africa and Australia, where it is considered a pest. This study examines the diet of... -
Adjuvant treatment, tumour recurrence and the survival rate of uterine serous carcinomas: a single-institution review of 62 women
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: F Pol --- Department of Obstetrics and Gynaecology, the Netherlands D Allen --- Department of Gynaelogical Oncology, Australia R Bekkers --- Department of Obstetrics and Gynaecology, the Netherlands P Grant --- Department of Gynaelogical Oncology, Australia S Hyde --- Department of Gynaelogical Oncology, AustraliaObjectives: The aim of this study was to assess our department’s management of uterine serous carcinoma (USC) and to determine the correlation of the recurrence and survival rates of stage I-IV patients with different adjuvant treatment modalities. -
Retrospective analysis of patients with cancer of the cervix attending a radiotherapy outpatient department: experience from a university-based hospital in eastern Uttar Pradesh, India
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: M Nandi --- Department of Radiation Oncology, India A Mandal --- Department of Radiotherapy and Radiation Medicine, Institute of Medical Sciences, India AK Asthana --- Radiotherapy and Radiation Medicine, Institute of Medical Sciences, IndiaObjective: A retrospective analysis of all patients with cancer of the cervix attending a radiotherapy outpatients department in a single unit from January 2005 to December 2006 was carried out to study their epidemiology, stage and status of presentation, compliance... -
Causes of Death in Patients Treated at a Tertiary Hospital in the Limpopo Province: a Retrospective Study from 2008-2010
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: N Malangu --- Department of Epidemiology and Biostatistics, S T Ntuli --- Department of Public Health Medicine, M Alberts --- Department of Medical Sciences,The aim of this study was to determine mortality rates and identify associated causes at a tertiary hospital situated in the Limpopo province of South Africa. Death notification forms from Pietersburg Mankweng Hospital Complex were retrieved and reviewed for the... -
Differences in the average Caesarean section rate across levels of hospital care in Gauteng, South Africa
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: R. Nathan --- Department of Community Medicine, P G D W Rautenbach --- Department of Community Medicine,Caesarean section rate is expressed as a percentage, and is calculated by dividing the total number of Caesarean sections by the total number of deliveries within a specifed period. This indicator is used to track obstetric performance. The objective of... -
Sexual size dimorphism in the lizard Oplurus cuvieri cuvieri (Squamata, Opluridae) from Madagascar
Item type: Journal Article • Journal: African Zoology • Authors: Herilala J.A.R Randriamahazo --- Department of Zoology, JapanSexual size dimorphism in the medium-sized lizard Oplurus cuvieri cuvieri, which is endemic to the dry deciduous forest of Madagascar, is presented. Adults are sexually dimorphic in body size, head size, and tail length. Males have a greater snout–vent length... -
The inshore benthic macroinvertebrates of Lake Nabugabo, Uganda: seasonal and spatial patterns
Item type: Journal Article • Journal: African Zoology • Authors: J. Efitre --- Zoology Department, Uganda L.J. Chapman --- Department of Zoology, U.S.A. B. Makanga --- Zoology Department, UgandaLake Nabugabo, Uganda, is a lake of particular interest because of the unusual nature of its benthic macroinvertebrate community. In this study we quantified the spatial and temporal distribution of benthic macroinvertebrates within the lakewith a focus on habitat associations... -
Population status of black and white colobus monkeys (Colobus guereza) in Kakamega Forest, Kenya: are they really on the decline?
Item type: Journal Article • Journal: African Zoology • Authors: Peter J. Fashing --- Department of Ecology, Evolution, and Environmental Biology, U.S.AEastern black and white colobus monkeys, or guerezas (Colobus guereza), are among the few primate species that have traditionally been regarded as not being adversely affected by habitat degradation. This view was recently challenged by von Hippel et al. (2000)... -
Prey selection by a reintroduced lion population in the Greater Makalali Conservancy, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Dave Druce --- School of Life & Environmental Sciences, South Africa Heleen Genis --- School of Life & Environmental Sciences, South Africa Jonathan Braak --- Makalali Private Game Reserve, South Africa Sophie Greatwood --- School of Life & Environmental Sciences, South Africa Audrey Delsink --- School of Life & Environmental Sciences, South Africa Ross Kettles --- Makalali Private Game Reserve, South Africa Luke Hunter --- School of Life & Environmental Sciences, South Africa Rob Slotow --- School of Life & Environmental Sciences, South AfricaLion prey selection was studied on the Greater Makalali Conservancy (140 km2), Limpopo Province, South Africa, in order to assist with management strategies. Monitoring was carried out between February 1998 and December 2001. Lion killed 15 species, with warthog, blue... -
A microsatellite perspective on the reproductive success of subordinate male honey badgers, Mellivora capensis
Item type: Journal Article • Journal: African Zoology • Authors: R. Verwey --- Department of Zoology, South Africa C. Begg --- Mammal Research Institute,, South Africa K. Begg --- Carnivore Conservation Group, Johannesburg C.A. Matthee --- Department of Zoology, South AfricaThe dominance hierarchy system of male honey badg ers, Mellivora capensis, does not appear to determine reproductive success in the species as subordinate males are frequently seen to gain brief access to re ceptive females. To establish whether these interac... -
Reproductive biology of a pride of lions on Karongwe Game Reserve, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Monika B. Lehmann --- Department of Nature Conservation, South Africa Paul J. Funston --- Department of Nature Conservation, South Africa Cailey R. Owen --- K.e.r.i. Research, Ecological Institute of Research, South Africa Rob Slotow --- School of Biological and Conservation Sciences, South AfricaThe reproductive biology of a pride of lions (Panthera leo) was studied on the 8500 ha Karongwe Game Reserve from 1999 to 2005. Over this period, the pride consisted of between four and 11 lions with a paired coalition of... -
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... -
Looking from a local lens: Inbound tour operators and sustainable tourism in Kenya
Item type: Journal Article • Journal: • Authors: Elena Cavagnaro --- Stenden Hotel Management School, Academy of International Hospitality Research, Stenden University of Applied Science, Leeuwarden, The Netherlands Simona Staffieri --- Italian National Institute of Statistics, Department of Social and Environmental Statistics, Rome, Italy Fiona Ngesa --- Kenya Tourist Board, Nairobi, KenyaFew empirical studies on sustainable tourism take into account the perspective of developing countries’ actors. This is even the case in debates about the need to adapt sustainability’s definitions to the context of developing countries. The present study aims at giving a... -
Examining the evidence for ecologically sustainable ostrich breeding practices on natural veld in the Little Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anita Wheeler --- Department of Botany, South Africa Andrew T Knight --- Department of Life Sciences, UK Susanne Vetter --- Department of Botany, South AfricaLand degradation in the Little Karoo is extensive. Overstocking of breeding ostriches on natural veld has been among the main causes of this. The National Department of Agriculture has set a general stocking rate of 60 ha LSU−1 as a... -
Family variation in diameter growth and acoustic velocity in three 5‑year‑old South African‑grown Pinus elliottii×Pinus caribaea progeny trials established on three diverse sites
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Francois S Malan --- Research Division, South AfricaThis paper discusses family differences in the stiffness of young Pinus elliottii×P. caribaea wood and how these differences relate to differences in growth rate and altitude. Trees for measurement were obtained from three 5‑year‑old progeny trials established at three diverse... -
Concurrent pregnancy and lactation in wild giraffes (Giraffa camelopardalis)
Item type: Journal Article • Journal: African Zoology • Authors: Francois Deacon --- Faculty of Natural and Agricultural Sciences, Department of Animal, Wildlife, and Grassland Sciences, South Africa Pierre J Nel --- Free State Department of Economic Development, Tourism, and Environmental Affairs, South Africa Fred B Bercovitch --- Primate Research Institute and Wildlife Research Center, JapanLactation boosts reproductive costs by depleting maternal condition and delaying subsequent conception. However, some evidence suggests that giraffes (Giraffa camelopardalis) have evolved a mechanism to minimise the time allocated to suckling-induced suppression of ovulation. Here, we show for the first... -
The Shockley five-parameter model of a solar cell: A short note
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: H.A. Koffi --- Department of Physics, Ghana A. Kuditcher --- Department of Physics, Ghana V.C.K. Kakane --- Department of Physics, Ghana E.A. Armah --- Department of Physics, Ghana A.A. Yankson --- Department of Physics, Ghana J.K.A. Amuzu --- Department of Physics, GhanaThis paper is concerned with an alternative formulation of the Shockley five-parameter model of a solar cell. This formulation leads to an explicit relationship between the short-circuit current and the light-generated current and the direct determination of the light-generated current... -
Response of instream animal communities to a short-term extreme event and to longer-term cumulative impacts in a strategic water resource area, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SH Foord --- Department of Zoology, Chair in Biodiversity Value and Change, Centre for Invasion Biology, South Africa PSO Fouché --- Department of Zoology, South AfricaDisturbance plays an integral part in generating heterogeneity required for ecosystem persistence, but the increased amplitude and duration of disturbances linked to drivers of global change could result in ecosystem shifts or collapse. Biomonitoring over time provides insights into trajectories... -
Risk disclosures by South African listed companies post-King III
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Kim Raemaekers --- School of Accountancy, South Africa Warren Maroun --- School of Accountancy, South Africa Nirupa Padia --- School of Accountancy, South AfricaThe introduction of principles on the governance of risk in the King Code on Corporate Governance (King III), coupled with the drive for more integrated models of reporting, has highlighted the need for effective communication of risks and risk-management strategies... -
Key elements for designing a strategy to generate social and environmental value: A comparative study of festivals
Item type: Journal Article • Journal: • Authors: Marisa P. de Brito --- Academy for Leisure, Breda University of Applied Sciences (NHTV), Breda, The Netherlands Liliya Terzieva --- Academy for Leisure, Breda University of Applied Sciences (NHTV), Breda, The NetherlandsThe world of events is becoming more competitive. Governmental bodies need to be more thorough in justifying public expenditure and its consequences, and commercial entities strive for exemplary corporate social responsibility. At the same time consumers are becoming more demanding;... -
Employees, sustainability and motivation: Increasing employee engagement by addressing sustainability and corporate social responsibility
Item type: Journal Article • Journal: • Authors: David Casey --- Stenden University of Applied Sciences, Leeuwarden, The Netherlands Sebastian Sieber --- Stenden University of Applied Sciences, Leeuwarden, The NetherlandsAn increasing number of academic studies indicate that we as humans are exploiting the planet earth to an extent that is no longer bearable. Put differently, we are actively destroying our very own basis of existence, especially considering the generations... -
Claiming Cape Town: towards a symbolic interpretation of Khoisan activism and land claims
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Rafael Verbuyst --- African Studies Centre Leiden, The NetherlandsCurrent political negotiations in South Africa which explore the possibility of pre-1913 land claims and the recognition of Khoisan traditional authorities have spurred the growth of the “Khoisan revival”: the phenomenon of people identifying as Khoisan and asserting indigenous rights... -
Corporate social responsibility, market competition, and shareholder wealth
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Doowon Ryu --- Business School, Korea University, Korea Doojin Ryu --- Department of Economics, Korea Joon Ho Hwang --- Business School, Korea University, KoreaThis paper examines the association between corporate social responsibility (CSR), product market competition (PMC) and shareholder wealth by analysing CSR and market data from January 2006 to December 2012 (excluding 2009) in Korea. We focus on the role of PMC,... -
Economic evaluation of water loss saving due to the biological control of water hyacinth at New Year’s Dam, Eastern Cape province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GCG Fraser --- Department of Economics and Economic History, South Africa MP Hill --- Department of Zoology and Entomology, South Africa JA Martin --- Department of Economics and Economic History, South AfricaWater hyacinth Eichhornia crassipes is considered the most damaging aquatic weed in the world. However, few studies have quantified the impact of this weed economically and ecologically, and even fewer studies have quantified the benefits of its control. This paper... -
Increased mining activities in the eastern Democratic Republic of Congo: an opportunity to improve the nutritional status of children under five-years-old
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Tn Achoki --- Global Health Initiative, Switzerland C Shilumani --- Public Health Specialist, South AfricaIntroduction: Household poverty and poor access to health and other social amenities are key drivers of malnutrition and poor child health in most low-resources settings. The Democratic Republic of Congo (DRC), in the backdrop of past instability, experiences a host... -
Alcohol consumption and cardiovascular disease risk in an African population in transition: the Prospective Urban and Rural Epidemiology (PURE) study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Pt Pisa --- Centre of Excellence for Nutrition, South Africa A Kruger --- Centre of Excellence for Nutrition, South Africa Hh Vorster --- Centre of Excellence for Nutrition, South Africa Bm Margetts --- Institute of Human Nutrition, United Kingdom T Loots Du --- Centre of Excellence for Nutrition, South AfricaObjective: There is evidence showing a cardioprotective effect of light to moderate alcohol consumption in many populations. Whether alcohol consumption reduces cardiovascular disease (CVD) risk in an African population remains unclear. This study therefore assessed the associations between alcohol consumption... -
Glycaemic index of selected staple carbohydrate-rich foods commonly consumed in Botswana
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: So Mahgoub --- Kaplan University, M Sabone --- School of Nursing, J Jackson --- Centre for Scientific Research,Objectives: Data on the glycaemic index (GI) of foods commonly consumed in Botswana are lacking. The present study aimed to evaluate the GI of some of the staple carbohydrate-rich foods eaten in Botswana. -
The 2012 University of Cape Town Faculty of Health Sciences centenary debate
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Td Noakes --- University of Cape Town,Our human ancestors thrived on a diet high in fat and protein of animal or fish origin for at least 2.5 million years. Foods with a high-energy content and nutritional density were required for the development of the large, energy-expensive... -
The effect of a combination of nutrition education, soy and vegetable gardening, and food preparation skill training interventions on dietary intake and diversity in women: a case study from Qwa-Qwa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: W. Oldewage-Theron --- Visiting Professor, Centre of Sustainable Livelihoods, South Africa A. Egal --- Director, Centre of Sustainable Livelihoods, South AfricaObjective: The objective of the study was to determine if an integrated food and nutrition intervention, including home gardening, nutrition education and recipe development and training, would improve dietary diversity in women. -
Low rates of exclusive breastfeeding are still evident in four South African provinces
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Lp Siziba --- Centre of Excellence for Nutrition, South Africa J. Jerling --- Centre of Excellence for Nutrition, South Africa Sm. Hanekom --- Centre of Excellence for Nutrition, South Africa E. Wentzel-Viljoen --- Centre of Excellence for Nutrition and Medical Research Council Research Unit for Hypertension and Cardiovascular Disease Faculty of Health Sciences, South AfricaObjectives: Breastfeeding is one of the primary strategies used to enhance infant nutrition and improving child survival worldwide. The intention of globally increasing the rate of exclusive breastfeeding (EBF) to at least 50% of infants in the first six months... -
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... -
Making Sense of Changing Hats: A Study of the Nigeria, Vietnam, and Azerbaijan/Kazakhstan Projects within the Norwegian Statoil and British BP Strategic Alliance
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Lin Lerpold --- Stockholm School of Economics, Sweden Lena Zander --- Department of Business Studies, SwedenTo explore group-based identities and collective sensemaking in the context of a cross-border alliance, a qualitative exploratory study was initiated. The emphasis was on interpretation of issues, within and around an interfirm partnership and the alliance process, perceived by those... -
Academic staff development: A lever to address the challenges of the 21st-century university classroom
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Severino Machingambi --- Academic Support Services Division, South AfricaThis paper reports on how a university of technology used design research to plan and roll out an academic staff development programme so as to influence the institutional throughput rate. The study forms part of the institution’s effort to understand... -
Does the exclusion of meiofauna affect the estimation of biotic indices using stream invertebrates?
Item type: Journal Article • Journal: African Zoology • Authors: John G Mbaka --- Biological Sciences Department, Kenya Charles M M’Erimba --- Biological Sciences Department, Kenya Henry T Karanja --- Natural Resources Department, Kenya Jude M Mathooko --- Global Research Akademic and Mentoring Services, Kenya Mercy W Mwaniki --- Department of Geomatic Engineering and Geospatial Information Sciences, KenyaBiomonitoring of rivers is usually undertaken using information based on macroinvertebrate assemblages. However, exclusion of meiofauna (i.e. invertebrates less than 0.5 mm in size) when sorting benthic invertebrates can affect the estimation of densities and other biotic indices. In the present... -
Voluntary employee reporting by the wholesale and retail companies listed on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Thando Loliwe --- University of Limpopo, South AfricaUsing stakeholder theory, this article investigates the level, subject types, location and determinants of voluntary employee disclosures in the annual reports of the wholesale and retail companies in South Africa listed on the Johannesburg Stock Exchange (JSE). It finds that... -
Advanced training in child psychology: Key elements in offering a Doctor of Psychology (DPsych) programme in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ronél van der Watt --- Department of Psychology, South Africa Carla Sharp --- Developmental Psychopathology Lab, Clinical Psychology, USAThe aim of this article is to propose some benchmarks for a Doctor of Psychology (DPsych) in advanced training in Child Psychology in South Africa, and to highlight key elements in offering such a programme. In doing so, we use... -
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... -
Effects of land-use changes on benthic macroinvertebrate assemblages in the tropical Umfurudzi River, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Bere --- Chinhoyi University of Technology, Zimbabwe G Chiyangwa --- Chinhoyi University of Technology, Zimbabwe T Mwedzi --- Chinhoyi University of Technology, ZimbabweThe responses of benthic macroinvertebrates to land-use-induced changes in water quality and habitat because of contrasting land-use types along the Umfurudzi River, Zimbabwe, were investigated in 2013. Five stations in a communal area upstream of Umfurudzi National Park, four on... -
Keeping kids in care: virological failure in a paediatric antiretroviral clinic and suggestions for improving treatment outcomes
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Susan Purchase --- HOPE Cape Town Association and Trust, South Africa Jayne Cunningham --- HOPE Cape Town Association and Trust, South Africa Monika Esser --- Immunology Unit, Division of Medical Microbiology, Department of Pathology, South Africa Donald Skinner --- Faculty of Medicine and Health Sciences, South AfricaThe burden of paediatric HIV in South Africa is extremely high. Antiretrovirals (ARVs) are now widely accessible in the country and the clinical emphasis has shifted from initiation of treatment to retention in care. This study describes the cumulative virological... -
Health and well-being among teenage mothers in a rural South African community
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jabu P. Mokwena --- Department of Psychology, Saraswathie Govender --- Department of Psychology, Mokgadi B. Setwaba --- Department of Psychology,This study sought to identify patterns of general health symptoms and coping abilities among school-going teenage mothers in the central region of Limpopo province, South Africa. The participants were 56 teenage mothers and 56 typically developing girls or non-mother peers... -
Coping strategies of mother carers of children living with chronic illness and disease in a rural South African community
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Tholene Sodi --- Department of Psychology, South Africa Bontle Kgopa --- Department of Psychology, South AfricaThe present study explored the coping strategies used by mother carers of children living with chronic illness and disease (CID) in a rural South African community. Ten mothers (age range = 30 to 56 years) were selected through snowball sampling... -
The influence of food abundance, food dispersion and habitat structure on territory selection and size of an Afrotropical terrestrial insectivore
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: William D Newmark --- Natural History Museum of Utah, USA Thomas R Stanley --- US Geological Survey, USAMost tropical insectivorous birds, unlike their temperate counterparts, hold and defend a feeding and breeding territory year-around. However, our understanding of ecological factors influencing territory selection and size in tropical insectivores is limited. Here we examine three prominent hypotheses relating... -
Physical and hydrological properties of peatland substrates from different hydrogenetic wetland types on the Maputaland Coastal Plain, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Franziska Faul --- Faculty of Earth and Environmental Sciences, Germany Marvin Gabriel --- Faculty of Life Science, Germany Niko Roßkopf --- Faculty of Life Science, Germany Jutta Zeitz --- Faculty of Life Science, Germany Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Sciences, South Africa Mathilde L Pretorius --- Centre for Environmental Management, South Africa Piet-Louis Grundling --- Centre for Environmental Management, South AfricaThe Maputaland Coastal Plain in KwaZulu-Natal province is home to 60% of all peatlands occurring in South Africa. These ecosystems are increasingly threatened by unsustainable agricultural utilisation, a growing population and climate change. The aim of the study was, therefore,... -
Securing African forests for future drier climates: applying ecophysiology in tree improvement
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Casparus J Crous --- Department of Plant and Soil Sciences, South Africa Francois S Malan --- 102, 2nd Avenue, South Africa Michael J Wingfield --- Department of Plant and Soil Sciences, South AfricaIncreasing incidences of drought-induced tree mortality are being recorded worldwide, including Africa. African forests cover a significant proportion of the continent, which implies that African forest sustainability is threatened from a climate-change perspective. This is especially problematic in a developing... -
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,... -
Self-harming behaviour among university students: A South African case study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Freda van der Walt --- Department of Business Management, South AfricaThis study investigated the prevalence of self-harming practices among South African university students. Respondents were 201 students attending a small university of technology in South Africa (females = 55%; males = 45%). The students completed a survey on their self-harming... -
Nutrient limitation in two marine diatoms inhibits release of bromoform
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Nguvava --- Department of Oceanography, South Africa B Kuyper --- Department of Oceanography, South Africa E Bucciarelli --- Department of Oceanography, South Africa H Waldron --- Department of Oceanography, South Africa C Palmer --- Applied Centre for Climate and Earth Systems Science, CSIR, South AfricaBromoform released from phytoplankton and kelp in the ocean is the largest known carrier of bromine to the atmosphere. The photoproducts of atmospheric bromoform catalyse ozone depletion. Laboratory investigations were conducted into the link between nutrient limitation and bromoform production... -
Effect of phosphorus and nitrogen sources on essential nutrient concentration and uptake by maize (Zea mays L.) during early growth and development
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Pieter-Ernst Coetzee --- Department of Soil, Crop and Climate Sciences, South Africa Gert M Ceronio --- Department of Soil, Crop and Climate Sciences, South Africa Chris C du Preez --- Department of Soil, Crop and Climate Sciences, South AfricaIn South Africa, maize is often produced on highly weathered soils with low organic matter contents. These soils are unable to supply sufficient nitrogen (N) and phosphorus (P) for sustainable maize production, resulting in the use of fertiliser sources containing... -
To what extent are students as middle managers at a training hotel involved in strategic decision making?
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Tjeerd Zandberg --- Stenden University, the NetherlandsResearch has shown that middle managers can exert major upward or downward influence on their organisation's strategy. In the practice department of our hotel school, senior students act as managers to train managerial competences. To analyse if this reflects reality,... -
The place branding of Qatar
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Maaike de Jong --- European Tourism Futures Institute, Stenden University, the NetherlandsDestination branding has become popular. Countries brand themselves to draw visitors and competent expatriates and to create economic diversification. The brand emphasises the uniqueness of the place; it frames the culture and sells its way of life. In the perspective... -
Employer branding: A new approach for the hospitality industry
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Sjoerd A Gehrels --- Stenden University of Applied Sciences, the Netherlands Joachim de Looij --- Hotel Mercure Arthur Frommer, The NetherlandsThe Western hospitality industry experiences a shortage of skilled professionals due to a poor image and competition from other sectors. Employer branding, which is used as a human resources strategy to differentiate brands, has the potential to deal with some... -
Grounded theory application in doctorate research
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Sjoerd Gehrels --- Academy of International Hospitality Research, Stenden University of Applied Sciences, The NetherlandsIn this paper a case of doctorate research methodology is presented, which can serve as contemplation for fellow researchers who are preparing their study. An interaction of reflective narrating and grounded theory methodology is applied. This approach incorporates personal and... -
The role of employee wellness programme in the hospitality industry: a review of concepts, research, and practice
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Tingting (Christina) Zhang --- Department of Human Sciences, USA Jay Kandampully --- Department of Human Sciences, USA Hye Yoon Choi --- Department of Human Sciences, USAIn the hospitality industry, employees are critical to firm success, through their intimate interactions with customers to create memorable experiences and relationships. A nascent strategy adopted by many hospitality firms seeks to increase employee engagement and commitment through employee wellness... -
The conflict between industry hosts and master's degree students' expectations on students entering the hospitality industry
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Rajka Presbury --- Blue Mountains International Hotel School, Australia Janette Illingsworth --- Blue Mountains International Hotel School, Australia Scott Richardson --- Blue Mountains International Hotel School, AustraliaThis paper reports on a qualitative study that sought to determine Australian industry hosts' expectations and perceptions of hotel management master's degree students on their placement in the industry, and the expectations of students when entering industry placement. The empirical... -
Looking from a local lens: Inbound tour operators and sustainable tourism in Kenya
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Elena Cavagnaro --- Stenden Hotel Management School, Academy of International Hospitality Research, Stenden University of Applied Science, The Netherlands Simona Staffieri --- Italian National Institute of Statistics, Italy Fiona Ngesa --- Kenya Tourist Board, KenyaFew empirical studies on sustainable tourism take into account the perspective of developing countries' actors. This is even the case in debates about the need to adapt sustainability's definitions to the context of developing countries. The present study aims at... -
Key elements for designing a strategy to generate social and environmental value: A comparative study of festivals
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Marisa P. de Brito --- Academy for Leisure, The Netherlands Liliya Terzieva --- Academy for Leisure, The NetherlandsThe world of events is becoming more competitive. Governmental bodies need to be more thorough in justifying public expenditure and its consequences, and commercial entities strive for exemplary corporate social responsibility. At the same time consumers are becoming more demanding;... -
Employees, sustainability and motivation: Increasing employee engagement by addressing sustainability and corporate social responsibility
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: David Casey --- Stenden University of Applied Sciences, The Netherlands Sebastian Sieber --- Stenden University of Applied Sciences, The NetherlandsAn increasing number of academic studies indicate that we as humans are exploiting the planet earth to an extent that is no longer bearable. Put differently, we are actively destroying our very own basis of existence, especially considering the generations... -
Hotel rate parity in the focus: Is there a need for change in the relationship between hotels in Berlin and their wholesale partners?
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Bastian Rashek --- School of Hospitality Management, The Netherlands Radu Mihailescu --- School of Hospitality Management, The NetherlandsRecent developments in revenue management at hotels in Berlin have brought a lot of challenges in upholding rate parity, particularly in the wholesale segment. Little research has been done on this topic, especially with regard to the advantages and disadvantages... -
Real-world lessons from the hospitality expert
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Robert Bosma --- Mind Your Guest, and Mind Your Brand, The NetherlandsThis article by Robert Bosma gives an insight in the world of hospitality in the real world and his vision about what hospitality is, how it works successfully and why people find it so important to be treated in a... -
Audit fee premium: The potential effect of King III
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Vincent Pendehama --- Faculty of Commerce, Law and Management, South Africa Nirupa Padia --- School of Accountancy, South Africa Chris Callaghan --- School of Economic and Business Sciences, South AfricaIn the wake of corporate scandals at world-renowned companies such as Enron (in 2001) and WorldCom (in 2002), public confidence in the role of the auditing profession was eroded. Consequently, in the United States, the Sarbanes-Oxley Act of 2002 (SOX)... -
Tax transparency reporting by the top 50 JSE-listed firms
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Madeleine Stiglingh --- Department of Accounting, South Africa Elmar R. Venter --- Department of Accounting, South Africa Ilinza Penning --- Department of Taxation, South Africa Anna-Retha Smit --- Department of Taxation, South Africa Anculien Schoeman --- Department of Taxation, South Africa Theuns L. Steyn --- Department of Taxation, South AfricaAs a result of increased regulatory focus on a number of firms’ tax behaviour, tax compliance is now recognised as a source of reputational risk. Transparency on the reporting of tax related matters in public corporate reports could mitigate a... -
Differences in nitrogen cycling and soil mineralisation between a eucalypt plantation and a mixed eucalypt and Acacia mangium plantation on a sandy tropical soil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sogni Viviane Tchichelle --- Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, Republic of the Congo Daniel Epron --- Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, Republic of the Congo Fidèle Mialoundama --- Université Marien NGouabi, Republic of the Congo Lydie Stella Koutika --- Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, Republic of the Congo Jean-Michel Harmand --- CIRAD, France Jean-Pierre Bouillet --- CIRAD, France Louis Mareschal --- Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles, Republic of the CongoSustainable wood production requires appropriate management of commercial forest plantations. Establishment of industrial eucalypt plantations on poor sandy soils leads to a high loss of nutrients including nitrogen (N) after wood harvesting. An ecological intensification of eucalypt plantations was tested... -
Seasonal population dynamics and energy consumption by waterbirds in a small temperate estuary
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jeffrey W Hean --- Department of Zoology and Entomology, South Africa Adrian JFK Craig --- Department of Zoology and Entomology, South Africa Nicole B Richoux --- Department of Zoology and Entomology, South AfricaSimple measures of population dynamics and energy consumption can provide baseline information on the role of consumers in food webs, particularly for cryptic or highly-mobile species of waterbirds. We provide estimates of the seasonal population dynamics and energy consumption of... -
Accounting for revenue using an accountability and business model framework: The case of the South African Institute of Chartered Accountants’ professional examinations
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Warren Maroun --- School of Accountancy, South AfricaThis research adopts a normative approach. It builds on the academic literature which argues that the usefulness of financial reporting can be enhanced by aligning accounting for balances and transactions with an organisation’s business model, as presented in its integrated... -
Evaluation of the prevention of mother-to-child transmission programme at a primary health care centre in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: OS Akinsanya --- Department of Public Health, UK JA Wiseberg-Firtell --- Department of Public Health, UK G Akpomiemie --- Reproductive Health & HIV Institute, University of the Witswatersrand, South Africa OV Adeniyi --- Department of Family Medicine, South Africa RP Kaswa --- Department of Family Medicine, South AfricaAim: To evaluate the effectiveness of the prevention of mother-to-child transmission (PMTCT) of the HIV programme at Levai Mbatha Community Health Centre (CHC), Evaton, South Africa. -
Depression in older adults: prevalence and risk factors in a primary health care sample
Item type: Journal Article • Journal: South African Family Practice • Authors: U Padayachey --- Department of Psychiatry, South Africa S Ramlall --- Department of Psychiatry, South Africa J Chipps --- Faculty of Community Health, South AfricaBackground: Depression in the geriatric population has been identified as a significant problem in view of the associated negative outcomes regarding poor functioning, increased perception of poor health and increased utilisation of medical services. Significantly associated with increased morbidity and... -
Merger imbalance and returns in international equity markets
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Adam Zaremba --- Department of Investment and Capital Markets, Poland Przemyslaw Grobelny --- Department of Investment and Capital Markets, PolandAt the global level, the mispricing theory of mergers by Shleifer and Vishny (2003) may imply that a significant number of targets acquired in a given country is a sign of market-wide undervaluation whereas intense acquisition activity indicates overvaluation. The... -
Manufacturing sector productivity growth drivers: Evidence from SADC member states
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Douglas Chikabwi --- Faculty of Commerce, Department of Economics, Zimbabwe Clainos Chidoko --- Faculty of Commerce, Department of Economics, Zimbabwe Calvin Mudzingiri --- Department of Economics, South AfricaThis study investigates major drivers of manufacturing sector productivity growth of selected Southern African Development Community (SADC1) member countries. Using country-specific, fixed effects panel data modelled in a Cobb Douglas production function for the period 2000–2013, the study estimated manufacturing... -
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... -
Assessment of three-year DBH and height data and genetic gain prediction for five Acacia mearnsii (black wattle) subpopulations in South Africa using REML/BLUP
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: SL Beck J de Guisti AK Louw MDV ResendeRecent research has shown Acacia mearnsii (black wattle) to be a source of high-quality pulp. This led to a change in the emphasis in the breeding programme at the Institute for Commercial Forestry Research, from improving bark yield and quality,... -
Bark removal for medicinal use predisposes indigenous forest trees to wood degradation in Zambia
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: D Chungu A Muimba-Kankolongo J Roux FM MalamboBark harvesting for medicinal purposes has become widespread in Zambia, mainly due to the high levels of poverty among the population. The injury caused to trees leads to wood deterioration as a result of insect damage and fungal infection. This... -
“What else can we do?” Strategies and negotiations around place and space in the case of “undocumented” Zimbabwean migrant workers in Botswana
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Treasa Galvin --- Department of Sociology, BotswanaRestrictive immigration laws, enhanced border controls, the criminalisation of migrants, punitive deportation practices and a lack of respect for the right to asylum have become a common feature of the contemporary world. In the face of these increasingly restrictive state... -
Productivity of the declining Bearded Vulture Gypaetus barbatus population in southern Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Sonja C Krüger --- Ezemvelo KZN Wildlife, South Africa Arjun Amar --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaRecent research has shown that anthropogenic influences are driving the abandonment of breeding territories in the declining southern African Bearded Vulture Gypaetus barbatus meridionalis population. Survival rates appear to be low (86% for adults) due to poisoning and collisions with... -
Child deaths at National District Hospital, Free State: one a month is better than one a week
Item type: Journal Article • Journal: South African Family Practice • Authors: H Brits --- Faculty of Health Sciences, Department of Family Medicine, South AfricaBackground: The United Nations set a two-thirds reduction in child mortality between 1990 and 2015 in the Millennium Development Goals (MDGs) of 2000. The National Department of Health (NDoH) introduced strategies to achieve these MDGs, which included new vaccines, better... -
The ecological integrity of the Lower Olifants River, Limpopo province, South Africa: 2009–2015 – Part A: Olifants River main stem
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SM Marr --- South African Institute for Aquatic Biodiversity, South Africa TD Mohlala --- SAEON Ndlovu Node, Kruger National Park, South Africa A Swemmer --- SAEON Ndlovu Node, Kruger National Park, South AfricaThe major rivers of the South African ‘Lowveld’ (low-latitude savanna) suffer numerous impacts from upstream economic activities. Whereas monitoring these rivers is required to detect biodiversity losses, record pollution events and devise mitigation strategies, current monitoring programmes are inadequate. In... -
The ecological integrity of the lower Olifants River, Limpopo province, South Africa: 2009–2015 – Part B: Tributaries of the Olifants River
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SM Marr --- South African Institute for Aquatic Biodiversity, South Africa TD Mohlala --- SAEON Ndlovu Node, Kruger National Park, South Africa A Swemmer --- SAEON Ndlovu Node, Kruger National Park, South AfricaMonitoring on the Lowveld reaches of the Olifants River, Limpopo River System, and its Steelpoort, Blyde, Klaserie and Selati tributaries was initiated in 2009. Analysis of the 2009–2015 data from four Olifants River sites showed deterioration in the river’s ecological... -
Physico-chemical water characteristics and aquatic macroinvertebrates of Lake Tsimanampesotse, south-western Madagascar
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JR Rasoloariniaina --- Centre National de Recherches sur l’Environnement (CNRE), MadagascarSaline lakes are known to be amongst the most productive ecosystems in the world. Tsimanampesotse, a ‘conservation hotspot’ soda lake in southwestern Madagascar, was integrated into the Ramsar wetland network in 1998. Despite its importance for aquatic birds, knowledge of... -
When plenty is not enough: an assessment of the white stumpnose (Rhabdosargus globiceps) fishery of Saldanha Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Parker --- Fisheries Management Branch, Department of Agriculture, South Africa SE Kerwath --- Fisheries Management Branch, Department of Agriculture, South Africa TF Næsje --- Norwegian Institute for Nature Research (NINA), Norway CJ Arendse --- South African National Parks, Rondevlei Scientific Services (Garden Route National Park), South Africa FJ Keulder-Stenevik --- Sars Centre for Marine Molecular Biology, Norway K Hutchings --- Anchor Environmental Consultants, South Africa BM Clark --- Anchor Environmental Consultants, South Africa H Winker --- Fisheries Management Branch, Department of Agriculture, South Africa PD Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa CG Attwood --- Department of Biological Sciences, South AfricaWhite stumpnose Rhabdosargus globiceps is the main target of the linefishery in Saldanha Bay. Increased fishing pressure over the last three decades, particularly by the recreational sector, has led to concerns regarding sustainability of the local white stumpnose stock. The... -
Population structure of the sicklefin lemon shark Negaprion acutidens within the Curieuse Marine National Park, Seychelles
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RD Hodgkiss --- Global Vision International Seychelles, Seychelles A Grant --- Global Vision International Seychelles, Seychelles JHR McClelland --- Global Vision International Seychelles, Seychelles R Quatre --- Seychelles National Parks Authority, Seychelles B Rademakers --- Global Vision International Seychelles, Seychelles C Sanchez --- Nature Seychelles, Seychelles C Mason-Parker --- Global Vision International Seychelles, SeychellesThis study produced the first data on population parameters for sicklefin lemon shark Negaprion acutidens at the granitic Seychelles Islands, adding to a limited catalogue of species information. Juveniles at a site in the Curieuse Marine National Park were tagged... -
Price gaps: Another market anomaly?
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Guglielmo Maria Caporale --- Brunel University London, CESifo and DIW Berlin, Alex Plastun --- Sumy State University, UkraineThis paper analyses price gaps in financial markets, also known as trading, opening, common, stock or morning gaps – all these terms being used to indicate that the current day’s opening price is not the same as the previous day’s... -
Implementation and evaluation of a weight-reduction programme for diabetic patients at a primary health care facility in the Western Cape: a pilot study
Item type: Journal Article • Journal: South African Family Practice • Authors: A Razak --- Metro District Health Services, South Africa AA Isaacs --- Metro District Health Services, South AfricaBackground: Diabetes is a common non-communicable disease and complications are resulting in increased disability, reduced life expectancy and enormous health costs for virtually every society. Medical Nutrition Therapy is important for the prevention, treatment, and self-management of diabetes, and the... -
Interrogating patient-centredness in undergraduate medical education using an integrated behaviour model
Item type: Journal Article • Journal: South African Family Practice • Authors: E Archer --- Centre for Health Professions Education, South Africa EM Bitzer --- Centre for Higher and Adult Education, South Africa BB van Heerden --- Faculty of Medicine and Health Sciences, South AfricaBackground: Patient-centredness, an approach that puts the patient at the centre of the consultation, thus focusing on patients instead of on his/her diseases, has been identified by most medical schools as a desired core competence of their graduates. Despite some... -
Outward foreign direct investment (OFDI) and knowledge flow in the context of emerging MNEs: Cases from China, India and South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Angathevar Baskaran --- Department of Development Studies, Faculty of Economics and Administration, Malaysia Ju Liu --- Faculty of Culture and Society, Sweden Hui Yan --- School of Management, Shanghai University, China Mammo Muchie --- SARChI (Innovation & Development), South AfricaThe paper explores the factors driving Outward Foreign Direct Investment (OFDI) by Emerging multinational enterprisess (EMNEs) and the patterns of knowledge transfer in six cases of EMNEs from three BRICS’ economies (India, China and South Africa). It found that there... -
Improving the performance of the EPT Index to accommodate multiple stressors in Afrotropical streams
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FO Masese --- Department of Fisheries and Aquatic Sciences, Kenya PO Raburu --- Department of Fisheries and Aquatic Sciences, KenyaThe EPT index (Ephemeroptera, Plecoptera and Trichoptera) may be skewed by the wide tolerance to multiple stressors of the Baetid, Caenid and Hydropsychid families, which affects the performance of the EPT index as an indicator of multiple stressors in aquatic... -
Empowering caregivers of orphans and vulnerable children in Swaziland
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Syloid Choice Makufa --- Pact, Swaziland Daisy Kisyombe --- Pact, Swaziland Nicole Miller --- Pact, Swaziland Nanette Barkey --- Pact, USAThis paper reports on the health and psychosocial impacts of a programme designed to economically empower female caregivers of orphans and vulnerable children (OVC). The results presented are from a cohort of 492 female caregivers who participated in savings groups... -
Fishery benefits from exploiting spawning aggregations not solely dependent on enhanced fish density
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Robinson --- Australian Research Council (ARC) Centre of Excellence for Coral Reef Studies, Australia NAJ Graham --- Australian Research Council (ARC) Centre of Excellence for Coral Reef Studies, Australia A Grüss --- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, USA C Gerry --- Seychelles Fishing Authority, Seychelles J Bijoux --- Seychelles Fishing Authority, SeychellesThe vulnerability of spawning aggregations to exploitation varies among fisheries as a result of differences in the population-density changes associated with this behaviour. However, vulnerability to fishing is also influenced by technology, environmental factors, and fish and fisher behaviours. Focusing... -
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... -
Focusing on monofilament nets while overlooking the priorities of artisanal fisheries governance in Senegal
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Thiao --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal A Mbaye --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal M Dème --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal HD Diadhiou --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), SenegalDespite its legal prohibition since 1998, the nylon monofilament net is still widely used in Senegalese artisanal fisheries. To achieve a complete ban on monofilament use, it is necessary to understand the main arguments for its continued use and what... -
A practical guide to the interpretation of PK/PD profiles of longer-acting analogue insulins. Part one: The principles of glucose clamp studies
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Oppel BW Greeff --- Department of Pharmacology, South Africa Jacob John van Tonder --- Triclinium Clinical Development (Pty) Ltd, South Africa Kershlin Naidu --- Department of Internal Medicine, South Africa Alicia McMaster --- Sanofi-Aventis South Africa (Pty) Ltd, South Africa Alet van Tonder --- Sanofi-Aventis South Africa (Pty) Ltd, South Africa Rashem Mothilal --- Sanofi-Aventis South Africa (Pty) Ltd, South AfricaGlucose clamp studies are used to determine pharmacokinetics (PK) and pharmacodynamics (PD) of analogue insulins. With the development of longer-acting basal analogue insulins, including glargine 300 (Gla-300) and insulin degludec (IDeg), results from numerous glucose clamp studies are readily available... -
Self-regulated learning among teacher education students: Motivational beliefs influence on the use of metacognition
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Charles Magoba Muwonge --- Department of Educational Foundations and Psychology, Uganda Ulrich Schiefele --- Department of Educational Sciences, Germany Joseph Ssenyonga --- Department of Educational Foundations and Psychology, Uganda Henry Kibedi --- Department of Psychology, UgandaIn the present study, we examined the relationships between motivational beliefs (self-efficacy, task value, and control of learning beliefs) and use of metacognitive learning strategies among teacher education students in Uganda. The sample comprised of 649 students selected from seven... -
Whose ethics? The international regulation of labour practices on South African export fruit farms
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Janie Swanepoel --- Department of Anthropology, South AfricaThis paper concerns private labour regulation services in the form of ethical audits. By describing the development and nature of ethical audits in the South African fruit export industry, it juxtaposes the complex relations between farm workers and farmers, shaped... -
Combating Corruption in Africa through Institutional Entrepreneurship: Peering in from Business-government Relations
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Tahiru Azaaviele Liedong --- School of Management, UKCorruption remains a significant barrier to the socio-economic development of Africa, despite efforts by various local, national and international stakeholders to combat it. Mishra and Maiko (2017), in their article which was published in Africa Journal of Management, suggest that... -
The ‘suitcase hypothesis’: Can entrainment of meroplankton by eddies provide a pathway for gene flow between Madagascar and KwaZulu-Natal, South Africa?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Ockhuis --- Cape Peninsula University of Technology, South Africa JA Huggett --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa G Gouws --- African Coelacanth Ecosystem Programme (ACEP), South Africa C Sparks --- Cape Peninsula University of Technology, South AfricaSimilarities in the marine fauna found off the coasts of southern Madagascar and KwaZulu-Natal Province (KZN), South Africa, led to the development of the ‘suitcase project,’ with the aim of establishing whether eddies that form off southern Madagascar may package... -
Realised genetic gains and estimated genetic parameters of two Eucalyptus grandis × E. urophylla hybrid breeding strategies
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Gert J van den Berg --- Mondi Forests (Pty) Ltd, South Africa Steven D Verryn --- Faculty of Natural and Agricultural Sciences, South Africa Paxie W Chirwa --- Faculty of Natural and Agricultural Sciences, South Africa Francois van Deventer --- Mondi Forests (Pty) Ltd, South AfricaConventionally, Eucalyptus grandis × E. urophylla (GU) hybrid material is first tested as seedlings in progeny trials for at least four years before ortets are selected and ramets of the selected ortets are propagated to test in clonal trials. The... -
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... -
Modelling machinery procurement with an emphasis on engineering features
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Basil Olufemi Akinnuli --- Department of Industrial and Production Engineering, NigeriaEngineering features are one of the predominant factors in considering machines for procurement; others are economic and supply conditions. Three major attributes considered under these strategic decisions are engineering features (reliability), economic features (annual operating cost) and supply condition (delivery... -
Household wealth and adoption of Integrated Striga Management (ISM) technologies in northern Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: L. J. S. Baiyegunhi --- School of Agricultural, Earth and Environmental Sciences, Discipline of Agricultural Economics, South Africa M. B. Hassan --- School of Agricultural, Earth and Environmental Sciences, Discipline of Agricultural Economics, South AfricaAgricultural households in developing countries often are unable and unwilling to adopt new technologies due to the deterrents to adoption imposed by numerous socio-economic, institutional and ecological factors. However, economic theory predicts that relatively wealthy households have better ability to... -
The persistence of firm-specific post-earnings announcement returns
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Dong Hyun Son --- College of Business, Korea Dan Palmon --- Department of Accounting and Information System, New Jersey Ari Yezegel --- Department of Accountancy, USAThis paper examines whether estimates of post-earnings-announcement returns derived from the historical firm-specific relation between earnings and returns help predict future post-earnings-announcement returns. We find that firms with historically high post-earnings announcement returns continue to exhibit high post-earnings announcement returns... -
Does institutional monitoring matter? Evidence from insider trading by information risk level
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Chune Young Chung --- School of Business Administration, Republic of Korea Sanggyu Kang --- School of Business Administration, Republic of Korea Doojin Ryu --- Department of Economics, Republic of KoreaWe examine the effects of institutional ownership on insider exploitation of asymmetric information. Because institutional investors monitor firm activities in order to improve the corporate information environment, such monitoring could decrease the intensity of insider trading on private information. We... -
Adult binge drinking: rate, frequency and intensity in Buffalo City Metropolitan Municipality, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Eyitayo Omolara Owolabi --- Department of Nursing Science, South Africa Daniel Ter Goon --- Department of Nursing Science, South Africa Oladele Vincent Adeniyi --- Department of Family Medicine, South Africa Eunice Seekoe --- Department of Nursing Science, South AfricaBackground: Binge drinking (BD) is a significant risk factor for several acute and chronic illnesses, including injuries. This study examines the rate, frequency and intensity of BD in Buffalo City Metropolitan Municipality (BCMM), South Africa. -
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,... -
Terrestrial discharge influences microbioerosion and microbioeroder community structure in coral reefs
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SA Mwachireya --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya M Carreiro-Silva --- Department of Oceanography and Fisheries (IMAR network), Portugal BE Hartwick --- Department of Biological Sciences, Canada TR McClanahan --- Wildlife Conservation Society, Marine Programs, USAMicrobioerosion rates and microbioeroder community structure were studied in four Kenyan protected coral-reef lagoons using shell fragments of Tridacna giant clams to determine their response to the influence of terrestrial run-off. Fourteen different microbioeroder traces from seven cyanobacteria, three green... -
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... -
Peatland substrates in northern KwaZulu-Natal: a study of the forming environments, properties and an approach towards classification
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marvin Gabriel --- Faculty of Life Science, Germany Camelia Toader --- Faculty of Mathematics and Natural Sciences, Germany Franziska Faul --- Faculty of Earth and Environmental Sciences, Germany Niko Roßkopf --- Faculty of Life Science, Germany Piet-Louis Grundling --- Centre for Environmental Management, South Africa Cornelius Wilhelm van Huyssteen --- Department of Soil, Crop, and Climate Sciences, South Africa Jutta Zeitz --- Faculty of Life Science, GermanyPeatlands in South Africa are rare and fulfil important ecological functions but are threatened by degradation. Because of this peatlands have gained increasing attention from scientists during the last two decades. However, knowledge of the peatland substrates and the means... -
Catalyzing Social Entrepreneurship in Africa: Roles for Western Universities, NGOs and Corporations
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Philip Mirvis --- Global Network on Corporate Citizenship, USA Bradley Googins --- Center for Corporate Citizenship at Boston College, USAThis article reviews research on promoting social entrepreneurship and enterprise in Africa. It also presents brief case studies on how select Western universities, NGOs and corporations are partnering with African institutions to help train and launch social entrepreneurs, to open... -
Cloud computing adoption: Strategies for Sub-Saharan Africa SMEs for enhancing competitiveness
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Martin Adane --- Faculty of Education, Finance & Management, South AfricaSmall and medium-sized enterprises (SMEs) need to design and implement strategies for adopting new technologies as a competitive tool for maintaining their competitive advantage and cloud computing is at its peak. Since its emergence, there has been a surge in... -
Contemporary institutional solid waste management practices of Haramaya University, Eastern Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ashenafi Yimam Kassaye --- School of Geography and Environmental Studies, EthiopiaEven though waste products arise from our ways of life and are generated at every stage of the process of production and development, the type of decision making that leads to adequate solid waste management requires a sound understanding of... -
How many can you catch? Factors influencing the occurrence of multi-prey loading in provisioning Greater Crested Terns
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Davide Gaglio --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Timothée R Cook --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Richard B Sherley --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Peter G Ryan --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South AfricaSeabirds use several methods to transport food to their chicks; most species carry food in their stomachs or crops, but some terns and auks carry prey in their bills. Terns usually only carry one prey item at a time, limiting... -
Effect of soil- and foliar-applied nitrogen fertiliser on growth, yield and protein content of spring wheat (Triticum aestivum L.) under glasshouse conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mongezi M Mbangcolo --- Dohne Agricultural Development Institute, South Africa Petrus J Pieterse --- AgriSciences, Department of Agronomy, South AfricaFoliar application of nitrogen (N) can be essential in improving yield and grain protein content of wheat. Limestone ammonium nitrate and calcium nitrate solution were used as two N top-dressing treatments applied at three growth stages to evaluate their effect... -
Carbohydrate-derived fulvic acid wellness drink: its tolerability, safety and effect on disease markers in pre-ART HIV-1 positive subjects
Item type: Journal Article • Journal: South African Family Practice • Authors: ME Botes --- Department of Internal Medicine, South Africa IS Gilada --- Private practice, India JR Snyman --- Consultant Fulhold (Pty) Ltd, South Africa JPL Labuschagne --- Private Statistician, South AfricaBackground: Many people take wellness drinks on a daily basis to enhance physical and emotional well-being. The safety and/or efficacy of these are not always known or even established in the populations likely to consume these. The safety, tolerability and... -
Rotation-end financial performance of vegetation control on Eucalyptus smithii in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Keith M Little --- School of Natural Resource Management, South Africa Anssi Ahtikoski --- Natural Resources Institute Finland, Finland Andrew R Morris --- Institute for Commercial Forestry Research, South AfricaControl of competing vegetation during eucalypt regeneration is important but the cost-benefit of varying levels of control is not well understood. A trial was initiated to quantify the impact of five vegetation control treatments on Eucalyptus smithii R.T.Baker. to determine... -
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... -
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... -
Neo-liberalism and neo-slavery
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Conrad Lashley --- Hospitality Studies, Academy of International Hospitality Research, The NetherlandsLow pay and other minimal benefits at work cause some people to be in a state of neo-slavery. They are nominally free individuals and are not the property of others, but their economic standing and power is so limited that... -
Conducting anthropological fieldwork in northern Ghana: emerging ethical dilemmas
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Saibu Mutaru --- Department of Sociology and Social Anthropology, South AfricaThis paper discusses two ethical dilemmas that I encountered when doing fieldwork on so-called witch camps in northern Ghana, places of protection under the auspices of an earth priest or chief for women who have been accused of witchcraft and... -
Perceived corporate ethical values and organisational justice in relation to employee commitment at a manufacturing company
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jeremy Mitonga-Monga --- Department of Industrial and People Management, South Africa Crystal Hoole --- Department of Industrial and People Management, South AfricaThis study investigated the relationship between employees’ perceptions of their organisation’s corporate ethical values and justice and their level of commitment. The study participants were 201 employees of a manufacturing company in the Democratic Republic of Congo (female = 32%%,... -
Tiller population dynamics in eight cultivars of elephant grass during undisturbed growth
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: José A Rueda --- Licenciatura en Zootecnia, Mexico Eusebio Ortega-Jiménez --- Colegio de Postgraduados, Mexico Javier F Enríquez-Quiroz --- Campo Experimental “La Posta”, Mexico Rogelio E Palacios-Torres --- Licenciatura en Zootecnia, Mexico Sergio Ramírez-Ordoñes --- Licenciatura en Zootecnia, MexicoThe aim of the study was to assess tiller population dynamics of aerial and basal tillers in eight cultivars of Pennisetum purpureum (Schumach.), syn. Cenchrus purpureus (Schumach.) Morrone, in a warm humid climate in Veracruz, Mexico. This is a pioneer... -
Temporal changes in prey composition and biomass delivery to African Crowned Eagle nestlings in urban areas of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tim van der Meer --- School of Life Sciences, South Africa Shane McPherson --- School of Life Sciences, South Africa Colleen Downs --- School of Life Sciences, South AfricaGlobally urban areas are expanding rapidly and this usually has negative effects on biodiversity. Despite this, some species manage to persist in urban areas, as is the case with African Crowned Eagles Stephanoaetus coronatus in KwaZulu-Natal, South Africa. As relatively... -
A comparative study of selected multi-criteria decision-making methodologies for location selection of very large concentrated solar power plants in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olayinka S. Ohunakin --- The Energy and Environment Research Group (TEERG), Mechanical Engineering Department, Nigeria Burak Omer Saracoglu --- Orhantepe Mahallesi, Tekel Caddesi, Istanbul, TurkeyThis work studies the location selection of very large concentrated solar power plants (VLCSPPs) in Nigeria using five Multi-Criteria Decision Making (MCDM) methodologies including: Analytic Hierarchy Process (AHP), Consistency-Driven Pairwise Comparisons (CDPC), Decision Expert for Education (DEXi), Elimination and Choice... -
Share price reaction to financial and integrated reports
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Gizelle D. Willows --- , South Africa Jessica A. Rockey --- , South AfricaThis study analyses whether significant cumulative average abnormal returns (CAAR) are observed before and after the release of financial results and integrated reports. The study was completed through the use of event study methodology, based on the capital asset pricing... -
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... -
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... -
My generation: A review of marketing strategies on different age groups
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Emilie Slootweg --- Stenden Hotel School, The Netherlands Bill Rowson --- Stenden Hotel School, The NetherlandsAs the famous pop group, the Who, sang “My generation”, referring to the wants and needs of their fans and popular culture in the mid-1960s, change was in the air. In the early 21st century an ever more complex world... -
Sustainable tourism development in Amsterdam Oud-West
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Thea Noordeloos --- International Hospitality and Service Management, The NetherlandsThe Netherlands is currently experiencing rapid tourism growth, with Amsterdam being the main destination. Academics widely discuss the impact of tourism on the environment, the economy and society, and stress the need for sustainable tourism development. Eight semi-structured interviews were... -
The development of soft skills during internships: The hospitality student’s voice
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Erwin Losekoot --- NHL Stenden University of Applied Sciences, The Netherlands Earney Lasten --- RMIT University, Vietnam Anne Lawson --- Auckland Institute of Studies, New Zealand Beverly Chen --- Auckland Institute of Studies, New ZealandThis paper considers the value of industrial placements in providing an opportunity for hospitality students to develop soft skills in the workplace in addition to the technical skills learned at their educational establishments. While there are concepts such as “problem-based... -
Long-term physico-chemical and faunal changes in a small, rural South African estuary
Item type: Journal Article • Journal: African Zoology • Authors: M Kajee --- Department of Biological Sciences and Centre for Invasion Biology, South Africa CL Griffiths --- Department of Biological Sciences and Centre for Invasion Biology, South Africa SJ Lamberth --- Fisheries Management, Department of Agriculture, South AfricaThe Palmiet Estuary is a small, rural estuary in the Western Cape that only closes briefly during dry summers. The system was previously surveyed during 1979 to 1980 and we repeated the survey in April 2015 (mouth closed) and September... -
Population fluctuations of Cerithidea decollata (Gastropoda: Potamididae) in mangrove habitats of the St Lucia Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JL Raw --- , South Africa GM Rishworth --- , South Africa R Perissinotto --- , South Africa JB Adams --- , South AfricaMangrove macrobenthos species are used as ecological indicators as they are sensitive to changes in sediment properties. In this study, the population density of the common mangrove whelk Cerithidea decollata was assessed during different environmental conditions in the St Lucia... -
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... -
Strategies and Technologies for Camel Milk Preservation and Utilization of Non-Marketed Milk in Arid and Semi-Arid Areas
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: Jackline Akinyi Ogolla --- University of Kassel. Faculty of Organic Agriculture. Department of Agricultural & Bio- systems Engineering, Germany Christian Dede --- University of Kassel. Faculty of Organic Agriculture. Department of Agricultural & Bio- systems Engineering, Germany Michael Wandayi Okoth --- University of Nairobi. College of Agriculture and Veterinary Sciences. Department of Food Science, Nutrition and Technology, Kenya Oliver Hensel --- University of Kassel. Faculty of Organic Agriculture. Department of Agricultural & Bio- systems Engineering, Germany Barbara Sturm --- University of Kassel. Faculty of Organic Agriculture. Department of Agricultural & Bio- systems Engineering, GermanyThis study determined the seasonal fluctuations in camel milk yield, consumption, spoilage and spillages, and explored its forms of consumption and the acceptability of camel milk powder in Isiolo County, Kenya. In addition, the utilization of non-marketed milk, preservation technologies,... -
Use of Animal Information and Trait Preferences for Making Breeding Decisions on Smallholder Dairy Farms
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: B. K. Bett --- Ministry of Agriculture, Kenya B. O. Bebe --- Department of Animal Science, KenyaSmallholder dairy farmers aim to maximize the proportion of potentially high milk yielding dairy genotypes in their herds as a breeding strategy to increase milk production for home consumption and cash income. This study describes how farmers aiming at attaining... -
Integrated control of mango blossom malformation in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Magaritha H Schoeman --- Agricultural Research Council–Tropical and Subtropical Crops, South Africa Ncobile B Zulu --- Agricultural Research Council–Tropical and Subtropical Crops, South Africa F André Botha --- Agricultural Research Council–Tropical and Subtropical Crops, South Africa Frikkie J Calitz --- Agricultural Research Council–Biometry, South AfricaMango malformation disease (MMD) is a serious disease worldwide, causing severe economic losses annually. In South Africa, recommendations for managing MMD are to break out malformed inflorescences when clearly visible. Despite these recommendations, high incidences of MMD were reported during... -
Navigating competing institutional logics in a developing economy
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Kassa Woldesenbet Beta --- Strategic Management and Marketing, UK John Storey --- People and Organization, UK Bruce T. LamontThis paper examines how senior managers in a developing economy, Ethiopia, navigate between, and draw upon, the competing logics of ‘state’ and ‘market’ when seeking to explain their firm’s business strategies. This fault-line is especially critical in such contexts. The... -
Parent sex education beliefs in a rural South African setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Motalenyane Alfred Modise --- School of Education, South AfricaThis study explored beliefs held by African community parents which are important in their children’s sexual health education. The informant parents (n = 30) were predominantly rural dwelling (female = 70%; black = 95%; rural = 80%; age range =... -
Factors that enhance academic learning and study behaviours: A qualitative study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Henry D. Mason --- Directorate of Student Development and Support, South AfricaThis exploratory study examined students’ conceptions of factors that enhance the use and application of academic learning and study strategies (LSS). A qualitative approach was used to explore the conceptions of 23 first-year university students (female = 14; age range... -
Impact of shorebird predation on intertidal macroinvertebrates in a key North African Atlantic wintering site: an experimental approach
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Joulami --- Faculty of Sciences Ben M’sik, Morocco R El Hamoumi --- Faculty of Sciences Ben M’sik, Morocco Z Daief --- Faculty of Sciences Ain Chock, Morocco H Bazairi --- Faculty of Sciences, Morocco RJ Lopes --- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO), InBio Laboratório Associado, PortugalShorebirds, as migratory aquatic birds and top predators in intertidal ecosystems, can be affected by global environmental changes and escalations in local impacts on coastal lagoons and estuarine trophic networks. Many shorebirds winter in North African Atlantic coastal sites, most... -
Bathymetry, substrate and fishing areas of Southeast Atlantic high-seas seamounts
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: OA Bergstad --- Institute of Marine Research (IMR), Norway ÅS Høines --- Institute of Marine Research (IMR), Norway R Sarralde --- Instituto Espanol de Oceanografia, Centro Oceanografico de Canarias, Spain G Campanis --- South East Atlantic Fisheries Organisation (SEAFO), Namibia M Gil --- Departamento de Ecología y Biología Animal, Edificio de Ciencias Experimentales, Spain F Ramil --- Departamento de Ecología y Biología Animal, Edificio de Ciencias Experimentales, Spain E Maletzky --- Ministry of Fisheries and Marine Resources, Namibia E Mostarda --- Food and Agriculture Organization of the United Nations (FAO), Italy L Singh --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa MA António --- Secretary of State of Affairs, Ministry of Agriculture, Rural Development and Fisheries, AngolaMost of the Southeast Atlantic Ocean is abyssal, and global bathymetries suggest that only ∼3.2% of the areas beyond national jurisdiction (ABNJ; also known as the high seas, as defined in the United Nations Convention on the Law of the... -
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... -
The attitudes of riparian communities to the presence of water hyacinth in the Wouri River Basin, Douala, Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SN Kenfack Voukeng --- Department of Zoology and Entomology, South Africa P Weyl --- Department of Zoology and Entomology, South Africa MP Hill --- Department of Zoology and Entomology, South Africa N Chi --- Watershed Task Group Coordinator (WTG), CameroonSince publication of the first record of Eichhornia crassipes in Cameroon in 1997, the weed has become highly invasive in the Wouri River Basin. Between June and September 2014, a socio-economic survey using participatory and qualitative methods was undertaken in... -
The role of fish-poultry integration on fish growth performance, yields and economic benefits among smallholder farmers in sub-Saharan Africa, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AP Shoko --- Tanzania Fisheries Research Institute, Tanzania SM Limbu --- Department of Aquatic Sciences and Fisheries Technology, Tanzania HA Lamtane --- Department of Animal, Aquaculture and Range Sciences, Tanzania MA Kishe-Machumu --- Tanzania Fisheries Research Institute, Tanzania B Sekadende --- Tanzania Fisheries Research Institute, Tanzania EE Ulotu --- Tanzania Fisheries Research Institute, Tanzania JC Masanja --- Kilombero District Council, Tanzania YD Mgaya --- Department of Aquatic Sciences and Fisheries Technology, TanzaniaAquaculture practices from sub-Saharan Africa are characterised by low production, owing to improper technology. Production can be increased through integrating fish farming with other existing on-farm activities, particularly livestock husbandry. We assessed the role of fish-poultry integration on all male... -
Inventory of kiln stacks emissions and health risk assessment: Case of a cement industry in Southwest Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Solomon O. Giwa --- Department of Mechanical Engineering, Nigeria Collins N. Nwaokocha --- Department of Mechanical Engineering, Nigeria Abayomi T. Layeni --- Department of Mechanical Engineering, NigeriaCement production is a significant source of air pollution as both gaseous and particulate materials released are detrimental to the ecosystem. This work was carried out in a cement industry located in Southwest Nigeria. The emission rates of carbon monoxide... -
Exchange rate impact on output and inflation: A historical perspective from Zimbabwe
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nyasha Mahonye --- School of Economic and Business Sciences (SEBS), South Africa Tatenda Zengeni --- Competition and Tariff Commission of Zimbabwe, Harare, ZimbabweThis research looks at the inflationary effect of currency devaluation and its contractionary effect on real output growth in Zimbabwe. The study uses quarterly data from 1990 to 2006 and utilizes the Johansen co-integration regression test and vector error correction... -
Tax governance compliance: An exploratory study of the 50 largest Johannesburg Stock Exchange-listed companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Cara Thiart --- School of Accountancy, South AfricaIn line with current international sentiment which promotes greater transparency, the King Committee on Corporate Governance in South Africa updated its corporate governance framework through the issue of the King IV Report on Corporate Governance for South Africa, which replaced... -
Disconnect between policy and practice in developing countries: Evidence of managing e-waste from Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Johnson Ojiyovwi Okorhi --- Institute of Engineering, Technology, and Innovation Management, Nigeria Joe E. Amadi-Echendu --- Institute of Engineering, Technology, and Innovation Management, Nigeria Helen Olubunmi Aderemi --- Department of Management and Accounting, Nigeria Roland Uhunmwangho --- Electrical/Engineering Department, Nigeria Anthony Chukwudi Okwubunne --- National Centre for Technology Management (NACETEM), NigeriaThere are insufficient management functions that begin with planning, institutional arrangements and technical handling of e-waste materials in Nigeria. Modern trends in recycling still fall short of global practices. This study examined Waste Electrical and Electronic Equipment (WEEE) management strategies... -
Contribution to the knowledge of the macroinvertebrate fauna of the streams of Kahuzi-Biega National Park, Democratic Republic of Congo
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MF Ngera --- Centre de Recherche en Sciences Naturelles Lwiro, Democratic Republic of Congo SU Pauls --- Senckenberg Research Institute and Natural History Museum, Germany RW Holzenthal --- Department of Entomology, USA M Bagalwa --- Centre de Recherche en Sciences Naturelles Lwiro, Democratic Republic of Congo MA Bisimwa --- Centre de Recherche en Sciences Naturelles Lwiro, Democratic Republic of Congo EM Mushayuma --- Centre de Recherche en Sciences Naturelles Lwiro, Democratic Republic of Congo DR Cammaerts --- Independent researcher, research associate of the CRSN-Lwiro, Democratic Republic of CongoThe Albertine Rift is one of Africa’s major biodiversity hotspots. However, the aquatic fauna of its western border in Democratic Republic of Congo (DRC) remains understudied and poorly characterised. Kahuzi-Biega National Park (KBNP) in DRC is a crucial link for... -
Designing a business model from process perspective
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Aygül Dönmez-Turan --- Faculty of Economic and Administrative Sciences, Departments of Business Administration, Turkey Mina Özevren --- Faculty of Business Administration, TurkeyThe business model is a relatively new concept in entrepreneurship and strategic management literature. Thus, the growing body of business model literature contains qualitative research, especially case studies. The key reason business models are explained via case studies is that... -
Effects of the 2008 global financial crisis on corporate social responsibility and firm value in Korea
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Doowon Ryu --- Business School, Republic of KoreaThis study examines the effect of the 2008 global financial crisis on firms’ corporate social responsibility (CSR) by analysing Korean CSR and market data from 2004 to 2016 (excluding 2007). We focus on the role of the 2008 global financial... -
The Role of Gender and Other Socioeconomic Factors in the Adoption of the Contagious Bovine Pleuropneumonia Vaccine: A Literature Review
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: Elizabeth Waithanji --- Independent gender consultant, Salome Wanjira Kairu-Wanyoike --- Deputy Director Veterinary Services, Department of Livestock, Kenya Millicent Liani --- Centre for Capacity Research, United KingdomThis paper looks at the role of gender and other socioeconomic factors in the adoption of the contagious bovine pleuropneumonia (CBPP) vaccine in response to three research questions: What gender and socioeconomic factors affect the adoption of the CBPP vaccine?... -
Paratext and the Making of YA Fiction Genre: The Repoussoir
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Jane Wangari Wakarindi --- African Literature, South AfricaThis paper is premised on the assumption that Young Adult Literature (YAL) is a relatively new development in Kenya, having been neglected both in research and production of books that promote the Young Adult Fiction (YAF) genre. The genre has... -
Corporate effective tax rates: An exploratory study of South African listed firms
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Cecileen Greeff --- School of Accountancy, Faculty of Economic and Management Sciences, South AfricaThe corporate effective tax rates (ETRs) of South African firms listed on the Johannesburg Stock Exchange (JSE) were examined for the period 2009 to 2017 to determine if there were any changes over this period. The study further investigated the... -
The measurement and potential drivers of integrated report quality: Evidence from a pioneer in integrated reporting
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Arson Malola --- School of Accountancy, University of the Witwatersrand, South Africa Warren Maroun --- School of Accountancy, University of the Witwatersrand, South AfricaThis paper develops a measure for integrated report quality and explores possible drivers of high-quality reporting considering a sample of large listed companies in 2015 and 2016. Data are collected from South Africa where integrated reporting has been established for... -
Presidential Address: Embracing the Secular in our ‘Sacred Scholarly World’
Item type: Journal Article • Journal: Africa Journal of Management • Authors: David B. Zoogah --- Department of Management and Entrepreneurship, Williams College of Business, USAIn this Address, I reflect on the journey of AFAM with regard to its past, present and future. As a new scholarly community, AFAM is called to the sacred society. Its future therefore should be based on the use of... -
Innovation and entrepreneurship framework within the Middle East and North Africa region
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Abdelkader Mazouz --- College of Business, Al Ain University of Science and Technology, UAE Loay Alnaji --- Computer Science Department, Moorpark College, Moorpark, USA Riadh Jeljeli --- College of Business, Al Ain University of Science and Technology, UAE Fayez Al-Shdaifat --- College of Business, Al Ain University of Science and Technology, UAEWhen linked, Innovation, Entrepreneurship and Leadership provide a platform for Organizational survival. This paper develops a framework for innovation – a necessary condition that requires the appropriate leadership in order to guide its course in the right direction. Innovation Proficiency... -
Growth and yield responses of two ginger species to different levels of nitrogen
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Auges Gatabazi --- Department of Plant and Soil Sciences, South Africa Diana Marais --- Department of Plant and Soil Sciences, South Africa J Martin Steyn --- Department of Plant and Soil Sciences, South Africa Hintsa T Araya --- Agricultural Research Council–Vegetable and Ornamental Plants, South Africa Salmina N Mokgehle --- Agricultural Research Council–Vegetable and Ornamental Plants, South AfricaNitrogen (N) is a critical determinant of plant growth and productivity, but there is limited information on the agronomic parameters of medicinal plants. Three levels of N fertiliser (0, 1.375 and 1.625 g plant−1) were used to investigate the effects... -
Mid-upper arm circumference (MUAC) as a feasible tool in detecting adult malnutrition
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: E Van Tonder --- Department of Dietetics, South Africa L Mace --- Dietetics Department, Department of Health, South Africa L Steenkamp --- Dietetics Department, Department of Health, South Africa R Tydeman-Edwards --- Dietetics Department, Department of Health, Port Elizabeth Provincial Hospital, South Africa K Gerber --- Nursing Department, South Africa D Friskin --- Department of Statistics, South AfricaObjectives: This study aimed to expand on the limited South African malnutrition prevalence data and investigate the feasibility of mid-upper-arm circumference (MUAC) as a malnutrition screening tool. -
Impacts of a concentrated solar power trough facility on birds and other wildlife in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Corey Jeal --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Vonica Perold --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Samantha Ralston-Paton --- BirdLife South Africa, South Africa Peter G Ryan --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaThis study assesses bird and wildlife mortality and changes in bird species communities at a 50 MW utility-scale concentrated solar power parabolic trough facility in South Africa. The facility was searched for evidence of large vertebrate mortalities over three months... -
Minimum corporate website disclosure levels and information asymmetry: Evidence from Johannesburg Stock Exchange small-cap companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: George Nel --- School of Accountancy, Stellenbosch University, South Africa Roelof Baard --- School of Accountancy, Stellenbosch University, South AfricaThe use of corporate websites as communication medium may contribute to good governance and specifically transparency as one of the basic principles of governance, mitigating the effect of the agency problem. The primary objective of this study was to ascertain... -
Integrating services for impact and sustainability: a proof-of-concept project in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: J Lyn Haskins --- Centre for Rural Health, South Africa Sifiso A Phakathi --- Centre for Rural Health, South Africa Merridy Grant --- Centre for Rural Health, South Africa Christiane M Horwood --- Centre for Rural Health, South AfricaBackground: Integration of services in primary health care settings can provide mother/baby pairs with all required services at one visit. This study aimed to evaluate a proof of concept, quality improvement (QI) intervention to strengthen well-child service provision and integration... -
Comparing feeding niche, growth characteristics and exploitation level of the giraffe catfish Auchenoglanis occidentalis (Valenciennes, 1775) in the two largest artificial lakes of northern Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SM Abobi --- Faculty of Biology (FB2), Germany JW Oyiadzo --- Department of Fisheries and Aquatic Resources Management, Ghana M Wolff --- Faculty of Biology (FB2), GermanyThe stomach contents of the giraffe catfish, Auchenoglanis occidentalis, populations from Lake Bontanga and Lake Tono, two artificial lakes, were analysed, together with length frequency data collected from July 2016 to June 2017, to gain knowledge of the stock bioecology... -
FTSE/JSE Index migration: Testing for a tradeable index effect
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Nico Katzke --- Department of Economics, South Africa Charlotte van Tiddens --- Prescient Securities,This paper studies whether periodic changes to the constituents in the Swix Top 40 Index leads to price distortions at quarterly rebalancing. Following large and predictable spikes in trade of affected stocks around rebalancing, the natural question is whether this... -
The politics of corporate social responsibility in the mining industry in Burkina Faso
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Rabake Kinba Hermelline M. Nana --- Huddersfield Business School, United Kingdom Eshani Beddewela --- Huddersfield Business School, United KingdomThis paper examines the non-market strategy of a multinational corporation in an institutionally weak country, specifically focusing on its corporate social responsibility. Theoretically, the paper argues that the motives and outcomes of corporate social responsibility could facilitate corporate political activity,... -
For better or for worse: Shaping the hospitality industry through robotics and artificial intelligence
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Nadine Drexler --- Stenden Hotel Management School, The Netherlands Viyella Beckman Lapré --- Stenden Hotel Management School, The NetherlandsContemporary technological applications are widely in use in the public sector; transportation, law enforcement, armed forces, and health care industries have long adopted robotics and artificial intelligence (AI). Our daily lives have been shaped through the digital transformation and, as... -
Goodwill impairment testing disclosures – South African compliance in 2018
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Charles Day --- Oxford Brookes Business School, United KingdomThis paper reviews compliance with the IAS 36 goodwill impairment testing disclosure requirements by South African entities included in the All Share Index of the Johannesburg Stock Exchange. A detailed extraction of disclosures provided by entities with material levels of... -
Ecological, recreational and educational potential of a small artificial wetland in an urban environment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PN Gitau --- School of Biological Sciences, Kenya GG Ndiritu --- School of Natural Resources and Environmental Studies, Kenya NN Gichuki --- School of Biological Sciences, KenyaPertinent questions remain on whether small, artificial wetlands, such as abandoned quarries play any ecological or socio-economic role in the environment. To increase information on roles played by small-sized artificial wetlands in the environment, an assessment study was carried out... -
Characterisation of selected micro-estuaries and micro-outlets in South Africa using microalgal, zooplanktonic and macrozoobenthic assemblages
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ML Magoro --- South African Institute for Aquatic Biodiversity, South Africa T Dalu --- South African Institute for Aquatic Biodiversity, South Africa LRD Human --- Department of Botany, South Africa R Perissinotto --- DST/NRF SARChI Chair in Shallow Water Ecosystems, South Africa SHP Deyzel --- South African Environmental Observation Network (SAEON), South Africa TH Wooldridge --- Department of Zoology, Institute for Coastal and Marine Research (CMR), South Africa JB Adams --- DST/NRF SARChI Chair in Shallow Water Ecosystems, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity, South AfricaSouth Africa has approximately 200 micro-estuaries and micro-outlets along its more than 3 000 km of coastline. Many of these microsystems (i.e. micro-outlets and micro-estuaries) share some characteristics with temporarily open/closed estuaries, but differ in that they are supplied by... -
Population structure and growth of the beaked clam Eumarcia paupercula (Bivalvia, Veneridae) in Maputo Bay, Mozambique
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ED Mugabe --- Centre of Coastal Studies and School of Marine and Coastal Sciences, Mozambique CA Amoda --- Centre of Coastal Studies and School of Marine and Coastal Sciences, Mozambique CL Griffiths --- Marine Research Institute and Department of Biological Sciences, South AfricaThe edible beaked clam Eumarcia paupercula (Holten, 1802) is an abundant component of the intertidal infauna in Maputo Bay, Mozambique, and is an important source of food and income for local communities. This study investigates the population structure and estimates... -
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... -
The effect of conditioning Acacia mearnsii De Wild. hedge-plants under shadenetting on rooting, elemental uptake and productivity of cuttings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sascha L Beck-Pay --- Institute for Commercial Forestry Research, University of KwaZulu-Natal, South Africa Mark D Laing --- Discipline of Plant Pathology, School of Agricultural Earth and Environmental Sciences, South AfricaAcacia mearnsii is a commercial forestry tree in South Africa, largely grown from open-pollinated seeds. Clonal deployment of superior selections of the species is restricted due to its poor rooting ability. The effects of conditioning parent hedge-plants under three levels... -
Bucking the trend: the African Black Oystercatcher as a recent conservation success story
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mark Brown --- School of Life Sciences, South Africa Brittany Arendse --- Nature’s Valley Trust, Nature’s Valley, South Africa Bruno Mels --- Nature’s Valley Trust, Nature’s Valley, South Africa Alan TK Lee --- School of Life Sciences, South AfricaThe African Black Oystercatcher Haematopus moquini is a charismatic, southern African near-endemic, wader species, that is often seen as a flagship species for coastal bird conservation, as it was recently down-listed regionally to Least Concern on the IUCN Red List... -
The impact of supply chain management practices on industry competitiveness: A mixed-methods study on the Zimbabwean petroleum industry
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Happyson Bimha --- Graduate School of Business & Leadership, South Africa Muhammad Hoque --- Graduate School of Business & Leadership, South Africa Elias Munapo --- School of Economics and Decision Sciences, South AfricaEffective supply chain management practices can enhance competitiveness along the supply chain. Fuel supply chain competitiveness requires a reliable flow of product and customer satisfaction. Competitiveness eluded the Zimbabwean petroleum industry over time and so this research looked at the... -
HeartMath approach to self-regulation and psychosocial well-being
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jorina Elbers --- HeartMath Research Center, USA Rollin McCraty --- HeartMath Research Center, USAThe ability to alter one’s emotional responses is central to overall well-being and effectively meeting the demands of life. In this article, we discuss the perspective that one’s ability to self-regulate the quality of feeling and emotion of one’s moment-to-moment... -
The firm’s asset volatility, effective tax rate and leverage effect: Evidence from Taiwan
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: An-Sing Chen --- Department of Finance, Taiwan Pham Tuan Anh --- National Chung Cheng University, Taiwan and Nguyen Tat Thanh University, VietnamThis paper examines firms’ asset volatility across a broad cross-section of publicly traded Taiwanese listed nonfinancial firms and its relationship with effective tax rate and equity volatility under the capital structure framework. By analysing the leverage effect hypothesis of firms... -
Breeding ecology of the Andalusian Buttonquail Turnix sylvaticus sylvaticus
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Carlos Gutiérrez-Expósito --- Departamento de Biología de la Conservación, Estación Biológica de Doñana-CSIC, Spain Ruth García-Gorria --- Ibn Khaldoun 1, El Jadida, Morocco Abdeljebbar Qninba --- Laboratoire de Géo-Biodiversité et Patrimoine Naturel (GEOBIO), Institut Scientifique, Morocco Miguel Clavero --- Departamento de Biología de la Conservación, Estación Biológica de Doñana-CSIC, Spain Eloy Revilla --- Departamento de Biología de la Conservación, Estación Biológica de Doñana-CSIC, SpainUnderstanding the breeding cycle of wildlife is essential to afford conservation strategies. This is especially important for barely studied species and urgent for those at serious risk of extinction. The Andalusian Buttonquail is an endangered endemic of the Western Mediterranean,... -
Breastfeeding practices among mothers of children aged 1–24 months in Egor Local Government Area of Edo State, Nigeria
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: AO Atimati --- Department of Child Health, Nigeria VY Adam --- Department of Community Health, NigeriaObjective: The aim was to determine the breastfeeding practices of mothers of children two years and below in Egor Local Government Area (LGA) of Edo State. -
Toward a strategic management perspective on local content in African extractives: MNC procurement strategies between local responsiveness and global integration
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Michael Wendelboe Hansen --- Center for Business and Development Studies, DenmarkLocal content requirements – i.e. government backed requirements that extractive MNCs must procure inputs locally – are fast becoming a major issue in MNC-host country bargaining in Africa. As a result of increasingly stringent local content requirements, extractive MNCs operating... -
Maternal HIV status disclosure to young uninfected children: psychological variables of the mother
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Maretha Visser --- Department of Psychology, South Africa Amukelani Jennifer Hlungwani --- Department of Psychology, South AfricaMothers living with HIV are faced with the dilemma of when and how to disclose their HIV-positive status to their young uninfected children. In this study, a South African sample of mothers living with HIV, with young uninfected children (6–10... -
How do firms combine different types of innovation? A multivariate probit approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: George Abuchi Agwu --- Department of Economics and Development Studies, Nigeria Tobechi Agbanike --- Department of Economics and Development Studies, Nigeria Nkechinyere Uwajumogu --- Department of Economics and Development Studies, Nigeria R. Anuli Ogbuagu --- Department of Economics and Development Studies, NigeriaWhen previous studies relate innovation behaviours to firm heterogeneity, they consider mainly product and process innovations. In this paper, we consider a wider range of types of innovation that firms could combine to form different innovation strategies. Using the multivariate... -
High flow variability and storm events shape the ecology of the Mbhashe Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NC James --- South African Institute for Aquatic Biodiversity, South Africa JB Adams --- Institute for Coastal and Marine Research, South Africa AD Connell --- South African Institute for Aquatic Biodiversity, South Africa SJ Lamberth --- South African Institute for Aquatic Biodiversity, South Africa CF MacKay --- Oceanographic Research Institute, South Africa GC Snow --- Institute for Coastal and Marine Research, South Africa L van Niekerk --- Institute for Coastal and Marine Research, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity, South AfricaThe possible impacts of extreme events on the ecology of selected aquatic biota within the Mbhashe Estuary were investigated during a four year (2010–2013) spring sampling programme. During periods of low to average flow conditions the estuary is shallow, turbid... -
Epibiotic assemblages on the pen shell Pinna rudis (Bivalvia, Pinnidae) at Matiota Beach, São Vicente Island, Cabo Verde
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: EP Lopes --- Faculty of Engineering and Maritime Sciences, Cabo Verde N Monteiro --- Faculty of Engineering and Maritime Sciences, Cabo Verde AM Santos --- Faculty of Engineering and Maritime Sciences, Cabo VerdeThe rough pen shell Pinna rudis Linnaeus, 1758 (family Pinnidae), a mollusc with an Atlantic–Mediterranean distribution, is able to live in coarse sandy substrates. Considering its shell structure and ecological characteristics, P. rudis can enhance biodiversity by providing a substrate... -
Effect of treated greywater by black shale and laterite on Lactuca sativa L. germination rate
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Drissa Sangare --- Department of Agronomic, Forestry and Environmental Engineering, Côte d’Ivoire Lassina Sandotin Coulibaly --- Department of Agronomic, Forestry and Environmental Engineering, Côte d’Ivoire Siaka Sylla --- Department of Science and Environmental Management, Côte d’Ivoire Lacina Coulibaly --- Department of Agronomic, Forestry and Environmental Engineering, Côte d’IvoireGreywater reuse for agricultural irrigation may contribute to reduced use of chemical fertilizers, and is helping to conserve scarce freshwater source. However, treatment methods that reduce the harmful effects of untreated greywater are essential for sustainable agriculture. This study aims... -
Corporate tax responsibility in Africa: Insight from Nigeria
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Kenneth Amaeshi --- , United Kingdom Bongo Adi --- , Nigeria Godson Ikiebey --- , Nigeria Neil McCulloch --- , United KingdomThis study explores how small business owners in Africa talk about their tax responsibility, using Nigeria as a case study. Data were collated through interviews, focus group sessions, and online chats. The study identifies two main types of tax responsibility... -
The influence of the market on inflation, not the other way around
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Carlos de Jesus --- , Gizelle D. Willows --- , Alison M. Olivier --- , South AfricaThe study of return prediction is fundamental to investors. However, inconclusive evidence exists as to whether returns on the South African (SA) stock market may be explained by movements in SA or international macroeconomic variables. This study investigates integration between... -
Structure and norms of the Learning and Study Strategy Inventory: A comparison of South African and American samples
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ingrid Opperman --- , South Africa Henry D. Mason --- , South AfricaThis study examined the factorial structure and scale values of the Learning and Study Strategies Inventory (LASSI) among a sample of South African university students (N = 6 065). Principal components and confirmatory factor analysis of the data yielded two... -
“You can’t bully me anymore”: Coping strategies in a group of psychologists accused of professional misconduct
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Hanlé Kirkcaldy --- , South Africa Esmé van Rensburg --- , South Africa Kobus du Plooy --- , South AfricaUpon receiving a professional misconduct complaint, practitioners are required to manage the complaint process while continuing with their professional work. The stress of a complaint may manifest in emotional difficulties and physical symptoms calling for supportive intervention. We explored the... -
Sheep, herbs and blood on the beach: discrepant representations of ritual acts for essentialising and reinforcing difference in contemporary South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Andrew D. Spiegel --- , South AfricaSouth Africa’s 2018/2019 summer holidays were marked by a flurry of media reports describing, some in vivid, graphic detail, the ritual slaughter of a sheep on a popular Cape Town beach by a group of #MustFall activists. Their action was... -
Effects of untreated industrial effluents on water quality and benthic macroinvertebrate assemblages of Lake Hawassa and its tributaries, Southern Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ST Mereta --- , Ethiopia A Ambelu --- , Ethiopia A Ermias --- , Ethiopia Y Abdie --- , Ethiopia M Moges --- , Ethiopia A Haddis --- , Ethiopia D Hailu --- , Ethiopia H Beyene --- , Ethiopia B Kebede --- , Ethiopia WL Mulat --- , United StatesThe present study investigates the impacts of industrial effluents on the macroinvertebrate assemblages and water quality of the Lake Hawassa watershed. The water quality and macroinvertebrate assemblages were assessed at 40 sampling sites. The chemical and ecological water quality was... -
Restorative followership in Africa: Antecedents, moderators, and consequences
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Baniyelme D. Zoogah --- Williams College of Business, Xavier University, USA James B. Abugre --- University of Ghana Business School, University of Ghana, GhanaIn this paper, we report on three studies that examine one perspective of strategic followership: restorative followership. It centers on the restorative behavior of followers in bad leadership contexts. In Study 1, we leverage insight from restorative behavior theory to... -
Multilevel perspectives on leadership in the African context
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Michael A. Abebe --- Vackar College of Business & Entrepreneurship, The University of Texas Rio Grande Valley, USA Amanuel G. Tekleab --- Mike Ilitch School of Business, Wayne State University, USA Augustine A. Lado --- David D. Reh School of Business, Clarkson University, USADespite the depth of research on leaders and leadership in the Western and Asian contexts, the study of leadership in the African context remains at a nascent stage. In this special issue, we take a multilevel perspective to review and... -
Companionate leadership: A shemswian perspective
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Baniyelme D. Zoogah --- Department of Management and Entrepreneurship, Williams College of Business, Xavier University, USAGiven the calls for theories and models of leadership unique to Africa, I leverage insight from African historical, anthropological, and philosophical accounts to propose one type of indigenous leadership: companionate leadership. It is based on ancient (Kemetic scribes of the... -
Effect of added organic substrates on reduction in a soil from the Maputaland Coastal Plain
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Brenton Mabuza --- , South Africa Cornelius Wilhelm van Huyssteen --- , South AfricaWetland soils of the Maputaland Coastal Plain do not exhibit the redox morphology typically associated with extended periods of water saturation. The aim of this paper was to determine if the addition of various organic substrates (buffalo grass, peat, sucrose)... -
Efficacy and profitability of weed management systems for honeybush in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Rayganah Rhoda --- , South Africa Cecilia Bester --- , South Africa Mlamuli Motsa --- , Eswatini Marlise Joubert --- , South Africa Gugu Tshabalala --- , South Africa Candice-Lee Lyons --- , South AfricaWeeds reduce crop productivity through competion for nutrients, water, light and space, and impact negatively on commercial crops. Honeybush tea (Cyclopia spp.) is an industry mainly focused on the organic cultivation of tea, using mechanical weeding control methods. To date,... -
Distribution and abundance patterns of two parapagurid hermit crabs (Crustacea: Decapoda: Anomura) along the west and south coasts of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AG Wright --- , South Africa CL Griffiths --- , South Africa TP Fairweather --- , South AfricaA series of over 6 000 research-trawl samples collected along the west and south coasts of South Africa between 1987 and 2014 were analysed for the presence and biomass of two parapagurid hermit crabs, Sympagurus dimorphus and Parapagurus bouvieri. The... -
On a collision course? The large diversity of birds killed by wind turbines in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: V Perold --- , South Africa S Ralston-Paton --- , South Africa P Ryan --- , South AfricaWind energy is a clean, renewable alternative to fossil fuel-derived energy sources, but many birds are at risk from collisions with wind turbines. We summarise the diversity of birds killed by turbine collisions at 20 wind energy facilities (WEFs) across... -
Age and growth of Nile tilapia Oreochromis niloticus (Linnaeus, 1758) from Lake Tana, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Degsera --- , Ethiopia M Minwyelet --- , Ethiopia T Yosef --- , EthiopiaAge and growth of Nile tilapia, Oreochromis niloticus, from Lake Tana were studied from June 2016 to May 2017. In total, 1 597 otoliths were collected from three representative sampling sites for macrozone analysis. Otoliths were ground and examined under... -
High genetic diversity and limited spatial structure in an endangered, endemic South African sparid, the red steenbras Petrus rupestris
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Gouws --- , South Africa SE Kerwath --- , South Africa WM Potts --- , South Africa NC James --- , South Africa NG Vine --- , South Africa PD Cowley --- , South AfricaThe red steenbras Petrus rupestris is endemic to South Africa, occurring from False Bay in the Western Cape Province to St Lucia in the province of KwaZulu-Natal. This species, the largest member of the family Sparidae, has undergone a substantial... -
Organisational culture influences on corporate social responsibility and sustainable procurement in a service sector industry
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Emelia Darko Adzimah --- , China Liu Lei --- , China Mumuni Ishawu --- , ChinaWe investigated the influence of organisational culture on the relationship between corporate social responsibility (CSR) directed towards internal and external stakeholders and sustainable organisational resource procurement. A sample of 526 employees of a service industry of Ghana were participants (female... -
Adoption determinants of multiple climate smart agricultural technologies in Zimbabwe: Considerations for scaling-up and out
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Angeline Mujeyi --- , South Africa Maxwell Mudhara --- , South Africa Munyaradzi J. Mutenje --- , ZimbabweUsing a multistage sampling technique, data were collected from 386 households in four districts of Zimbabwe to investigate current Climate Smart Agriculture (CSA) technology combinations smallholder farmers practising integrated crop-livestock farming are adopting, as well as the determinants of adoption... -
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... -
Determination of the series resistance of a solar cell through its maximum power point
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: H. A. Koffi --- , Accra, Ghana A. A. Yankson --- , Accra, Ghana A. F. Hughes --- , Accra, Ghana K. Ampomah-Benefo --- , Accra, Ghana J. K. A. Amuzu --- , Accra, GhanaA simple analytical approach has been developed to determine the series resistance, R s, of a solar cell. The method adopted here depends only on the knowledge of the open-circuit voltage, V oc, and the current and voltage at the... -
Differences in soil microbial communities and enzyme activity due to the application of bioslurry under cultivation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Motiki M Mofokeng --- , South Africa Johan Habig --- , South Africa Stephen O. Amoo --- , South Africa Christian P du Plooy --- , South Africa Phatu W Mashela --- , South Africa Mokhele E Moeletsi --- , South Africa Sonja Venter --- , South Africa Hintsa T Araya --- , South AfricaSoil micro-organisms influence soil ecosystem processes and properties. Their influence can be modified by cultivation practices, which affect their interaction with cultivated plants as well as soil physical and chemical properties. The study investigated differences in soil microbial activities between... -
Application of principles from the International < IR > Framework for including sustainability disclosures within South African integrated reports
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Shelly Herbert --- , South Africa Mark Graham --- , South AfricaWith the introduction of integrated reporting, organisations are now encouraged to integrate sustainability disclosures within their integrated reports, in addition to traditional sustainability reporting practices. The purpose of this study is to investigate whether the International < IR > Framework (the Framework) led to... -
Harnessing the potential of Precision Pest Management in plantation forests
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Bernard Slippers --- , South Africa Brett P Hurley --- , South Africa Jeremy Allison --- , South AfricaThere are numerous new and emerging technologies that allow for greater precision in forest pest management, from sequencing and chemical analyses to data collection through smart technologies, and integration, analysis and sharing of data across fields. These technologies allow for... -
Pheromones as management tools for non-Scolytinae Curculionidae: development and implementation considerations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Luki-Marie Scheepers --- , South Africa Jeremy D Allison --- , Canada Marc C Bouwer --- , South Africa Egmont R Rohwer --- , South Africa Bernard Slippers --- , South AfricaFor the large family Curculionidae, the number of species considered pests is expected to increase due to global movement of plant and soil material, as well as climate change. Pheromones are increasingly popular for use in pest management programmes, either... -
Spatial and temporal diversity of non-native biofouling species associated with marinas in two Angolan bays
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LB Pestana --- , Brazil GM Dias --- , Brazil AC Marques --- , BrazilArtificial structures in coastal areas provide substrates which facilitate the spread of non-native species. Published records of introduced benthic species in the coastal waters of Angola are scarce, and so far these have numbered 29 non-native species and seven cryptogenic... -
Common dolphin Delphinus delphis occurrence off the Wild Coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Caputo --- , South Africa PW Froneman --- , South Africa S Plön --- , South AfricaDespite their typical large group sizes, limited research exists on the occurrence of common dolphins Delphinus delphis because of the pelagic, offshore nature of this species and the lack of barriers to their movement in this environment. The main purpose... -
Towed passive acoustic monitoring complements visual survey methods for Heaviside’s dolphins Cephalorhynchus heavisidii in the Namibian Islands Marine Protected Area
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Gridley --- , South Africa MJ Martin --- , South Africa J Slater --- , South Africa J-P Roux --- , Namibia RJ Swift --- , United Kingdom SH Elwen --- , South AfricaThe genus Cephalorhynchus contains four dolphin species, of which three are classified as Near Threatened or Endangered and one subspecies is close to extinction. Understanding the species’ abundance, distributions and habitat preferences is necessary for effective management to prevent further... -
The impact of internal communication on customers’ perception of revenue strategies
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Marit de Vries --- , the Netherlands Bill Rowson --- , the Netherlands Xandra Vasse --- , the NetherlandsThis article focuses on communication, specifically internal communication, which is often underestimated when changes to management strategy affect both employees and customer perception. The article focuses on the front-office team in a hotel that is carrying out a new revenue... -
The influence of branding on the uptake of voluntary medical male circumcision: a case study of “Ndife Otsogola” in Lilongwe, Malawi
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Patrick Makono --- , Malawi Peter Mhagama --- , Malawi Chimwemwe Tsitsi --- , MalawiBackground: “Ndife Otsogola” [We are forward thinkers] is the voluntary male medical circumcision (VMMC) campaign in Malawi that is part of the HIV and AIDS health promotion strategy. In 2012, the government of Malawi and its VMMC stakeholders developed communication... -
The role of strategic supplier relationships in enhancing supply chain innovation: A qualitative study in the South African automotive manufacturing industry
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Malente Modungwa --- , South Africa Melissa Rinke --- , South Africa Assilah Agigi --- , South Africa Kelvinne Mocke --- , South AfricaSupply chain innovation is a mechanism that firms use to ensure efficient supply chain management through collaboration with external supply chain partners. The interaction between buyers and suppliers is especially crucial in fostering innovation resulting in modifications, improvements and development... -
Longitudinal species turnover rates are predictable and should guide location of sampling sites for South African river surveys to assess aquatic biodiversity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- , South Africa FC de Moor --- , South AfricaRepresentative samples of biota collected relative to environmental gradients are important for measuring present distributions and predicting shifts in distribution of taxa in response to climate change or reduced river connectivity. Based on river ecology theory and established measures of... -
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... -
Strategies of coping with the effects of HIV/AIDS in Chinamhora communal lands, Goromonzi rural district, Zimbabwe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Wilberforce Kurevakwesu --- , ZimbabweThis qualitative study assesses the impacts of HIV/AIDS on rural households in Chinamhora communal lands, explores the coping strategies of these rural households and establishes possible interventions towards improving their coping strategies. The study comes at a time when deaths... -
Perceived stress, coping and mental health of teachers: A latent profile analysis
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Vasti Marais-Opperman --- , South Africa Chrizanne van Eeden --- , South Africa Sebastiaan Rothmann --- , South AfricaThis study aimed to identify teachers’ stress profiles from their perceived stress responses, and to determine the relationships between their stress profiles, coping strategies, and mental health. Participants were a convenience sample of teachers (n = 209) in the Sedibeng... -
The performance implications of strategic responses of SMEs to the covid-19 pandemic: Evidence from an African economy
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Suzzie Owiredua Aidoo --- , Ghana Ahmed Agyapong --- , Ghana Moses Acquaah --- , USA Samuel Yaw Akomea --- , GhanaHow does the use of adaptive resilience (perseverance and retrenchment) as a strategic response influence the performance of SMEs during catastrophic events such as the COVID-19 pandemic? This study examines how adaptive resilience in the form of perseverance and retrenchment... -
Alone or in company? Cultural orientation, strategic response and COVID-19 outcomes
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Baniyelme D. Zoogah --- , USA Benedicta S. Quao --- , Ghana Vincent H. T. Musah --- , Ghana Patience O. Ahwireng --- , GhanaThe respiratory disease, Coronavirus Disease 2019 (COVID-19), which began in December 2019, and became a pandemic in early 2020, has posed critical challenges not only for nations and businesses but also individuals. As a result, management scholars are examining organizational... -
INTRODUCTION TO THE SPECIAL ISSUE: Preliminary investigations into the COVID-19 pandemic and management in Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Moses Acquaah --- , USA Rebecca Namatovu --- , Denmark Moses N. Kiggundu --- , CanadaThe COVID-19 pandemic and the resulting lockdowns and restrictions taken by African governments to mitigate the spread of the virus have adversely affected the lives of people, health systems, organizations, society, and national economies. In this special issue, we take... -
Macrofauna associated with intertidal mussel beds in the Knysna estuarine embayment, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Alan N Hodgson --- , South Africa Frances Smith --- , South Africa Peter Smith --- , South Africa Louw Claassens --- , South AfricaThe alien invasive mussel, Mytilus galloprovincialis, forms biogenic habitats in the embayment of Knysna Estuary. Invertebrate macrofauna inhabiting mussel beds were sampled from six sites in the embayment. In addition, mussel cover, mussel bed depth, density and size of mussels... -
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... -
Strengthening the DNA barcode reference library for South African estuarine macrofauna
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Fagg --- , South Africa NL Phair --- , South Africa L Claassens --- , South Africa RSK Barnes --- , South Africa S von der Heyden --- , South AfricaSeagrass ecosystems face many anthropogenic pressures, yet globally there is a lack of knowledge of their associated biodiversity. Molecular barcoding can aid in biomonitoring efforts, but few South African invertebrates are accounted for. We provide 48 new sequences for 15... -
Species composition and distribution of mayflies (Ephemeroptera) in relation to land use systems along the Thika River, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Maina --- , Kenya BM Mwangi --- , Kenya JJ Jumbe --- , KenyaMayflies (order Ephemeroptera) are widely distributed and commonly used in biological assessment of water quality because of their sensitivity. Their application as bio-indicators in tropical streams and rivers, however, is hampered by lack of adequate information about their status in... -
Using social practice approaches for strategic management research in Africa: an example, design considerations and potential contributions
Item type: Journal Article • Journal: Africa Journal of Management • Authors: William Phanuel Kofi Darbi --- , Ghana Stanley Coffie --- , GhanaAfrican management theories and practices have received scant scholarly attention in organization and management literature. The recognition for vast opportunities for developing, adapting and extending management concepts, theories and practices in situ has become topical. Scholars have responded thus far,... -
How hotels suffer from and deal with the economic effects of tourism seasonality: A case study of Aksum, Ethiopia
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Amare Yaekob Chiriko --- , EthiopiaThe aim of this study is to assess the economic costs of tourism seasonality on hotels, and strategies for addressing these costs by taking Aksum, northern Ethiopia, as a research context. Semi-structured interviews were employed to collect data from 14... -
What is luxury hospitality? A need to move towards a scientific understanding
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Andy Heyes --- , The NetherlandsThe world of luxury and that of luxury hospitality has been growing for numerous years. From hotels such as the Burj Al Arab in Dubai, The Torch in Doha and The Savoy in London, luxury hospitality and the variety which... -
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... -
A comparison of zinc sources and extraction methods on sandy soils suitable for maize cropping
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: CF Wessels --- , South Africa LF van Straaten --- , South Africa CC du Preez --- , South Africa GM Ceronio --- , South AfricaMaize is the most important crop produced for human and animal nourishment in South Africa. The crop is susceptible to zinc (Zn) deficiencies, which result in lower grain yields with poorer nutritional value. Knowledge of the nature and behaviour of... -
Evaluating the evidence for ecological effectiveness of South Africa’s marine protected areas
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Kirkman --- , South Africa BQ Mann --- , South Africa KJ Sink --- , South Africa R Adams --- , South Africa T-C Livingstone --- , South Africa JB Mann-Lang --- , South Africa MC Pfaff --- , South Africa T Samaai --- , South Africa MG van der Bank --- , South Africa L Williams --- , South Africa GM Branch --- , South AfricaWe reviewed 140 papers to assess the ecological effectiveness of South Africa’s marine protected areas (MPAs). Evidence was assessed for coverage and representivity, protection of important biodiversity areas, other recognised elements of effectiveness, connectivity, and ecological effects—from the scale of... -
A review of the limnology of the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Mangaliso J Gondwe --- , Botswana Mike Murray-Hudson --- , Botswana Nashaat M Mazrui --- , Botswana Oliver Moses --- , Botswana Edwin Mosimanyana --- , Botswana Oarabile Mogobe --- , BotswanaWater quantity and quality are important aspects in the management of aquatic ecosystems, including wetlands. This paper has integrated available knowledge from literature on the limnology of the Okavango Delta, Botswana. The current near-natural solute concentrations in the inflow waters... -
Short-term recovery of macroinvertebrate communities following a flash flood in an urban river: a case study of the Palmiet River in Durban, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Khumalo --- , South Africa S Mdluli --- , South Africa J Lebepe --- , South AfricaExtreme floods have become frequent in the urban Palmiet River due to exacerbating climate change. Therefore, the current study aimed to explore a short-term recovery of macroinvertebrate communities following a flash flood in the Palmiet River, KwaZulu-Natal, South Africa. Different... -
Investigating climate change awareness and adaptation strategies among female farmers in the Lephalale municipal area in South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Michael Obisesan --- , South Africa Munyaradzi Chitakira --- , South AfricaThis study evaluated climate change awareness and adaptation strategies among female farmers in the Lephalale municipal area in the Limpopo province of South Africa. A concurrent mixed method research approach was undertaken. Qualitative data were obtained through five focus group... -
Comparison of seed germination and vigour in low and high phytic acid maize synthetic populations and commercially available hybrids
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mohammed A Elgorashi Bakhite --- , South Africa Nkanyiso J Sithole --- , South Africa Lembe S Magwaza --- , South Africa Alfred O Odindo --- , South Africa John Derera --- , South AfricaPlant breeders have focused on reducing phytic acid in maize seeds to improve grain nutritional quality. However, this could have negative effects on seed quality. The objective of this study was to compare seed performance of low and high phytic... -
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... -
Exit strategies for social venture entrepreneurs in sub-Sahara Africa: A literature review
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Alexander Tetteh Kwasi Nuer --- , Ghana Gert Van Dijk --- , The Netherlands Joost Jongerden --- , The NetherlandsThis paper reviews exit strategies for social venturing entrepreneurs. Exit is important for social venture entrepreneurs because they do not intend to stay in perpetuity in businesses they establish in the countries and communities where such businesses are set up... -
The relationship between tax transparency and tax avoidance
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Madeleine Stiglingh --- , South Africa Anna-Retha Smit --- , South Africa Anri Smit --- , South AfricaAll over the world, the tax avoidance practices of large multinational firms have received much media attention over the last few years, which has become a prominent reputational risk for many firms. In addition to the possible reputational risk stemming... -
Investigating the impact of country-by-country reporting on effective tax rates: Exploratory evidence from listed South African multinational groups
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Cara Thiart --- , South AfricaBackground: Following the global initiative to curb base erosion and profit shifting, South Africa introduced Country-by-Country (CbC) reporting standards for South African multinational groups with an effective date of 1 January 2016. -
Corporate ethical values and ethical work climate influences on employees’ helping behaviour in a developing country’s banking sector setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jeremy Mitonga-Monga --- , South Africa Aden-Paul Flotman --- , South AfricaThis study investigated the influence of corporate ethical values and work ethical climate on employees’ helping behaviour. A convenience sample (n= 421) of employees at a bank in the Democratic Republic of Congo were participants (female = 32.5%). The employers... -
Emotional intelligence and academic success among South African engineering students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Barend J. van Wyk --- , South Africa Henry D. Mason --- , South AfricaThis study explored the relationship between emotional intelligence and academic success among a sample of 1 346 South African engineering students. Data were collected from the students using the Emotional Skills Assessment Process (ESAP). Academic success was calculated using the... -
Ready for recovery: Hoteliers’ insights into the impact of COVID-19 on the Indian hotel industry
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Girish K Nair --- , Qatar Shaheema Hameed --- , India Swati Prasad --- , QatarThis research studies the hotel manager perspective of COVID-19 (the novel coronavirus) on the Indian hotel industry by qualitatively analysing inputs from the human resources department, general management and top management of five-star hotels across India. In doing so, it... -
Predicting corporate defaults using machine learning with geometric-lag variables
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Hyeongjun Kim --- , Korea Hoon Cho --- , Korea Doojin Ryu --- , KoreaThis study examines whether corporate default prediction techniques based on machine learning can achieve better performance by using geometrically declining weighted average values of the time series variables, that is, geometric-lag variables. We test four machine learning algorithms: logistic regression,... -
Multi-asset allocation of exchange traded funds: Application of Black–Litterman model
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Mei-Ling Tang --- , Taiwan Feng-Yu Wu --- , Taiwan Ming-Chin Hung --- , TaiwanThe Black–Litterman (BL) model allows investors to apply their subjective views to asset allocation optimisation. In this study, we construct a multi-asset allocation portfolio of iShares exchange traded funds (ETFs) using mean–variance (MV) and BL models. Two investment strategies, namely... -
Population parameters, exploitation rate and diet of black-chinned Tilapia, Sarotherodon melanotheron Rüppell, 1852 (Pisces: Cichlidae), from Badagry Creek, Lagos, Nigeria
Item type: Journal Article • Journal: African Zoology • Authors: Prince Emeka Ndimele --- , Nigeria Fatai Gbolahan Owodeinde --- , Nigeria Edwin Oritseweyinmi Clarke --- , Nigeria Olufemi Olusegun Whenu --- , Nigeria Olufemi Olabode Joseph --- , NigeriaThe black-chinned tilapia (Sarotherodon melanotheron) is a member of the cichlid family, which can be cultured to complement the output from a predominantly catfish aquaculture industry in Nigeria. In order to achieve this objective, it is important to study the... -
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... -
Timing, duration and symmetry of moult in Cape Gannets
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Oluwadunsin E Adekola --- , South Africa Robert JM Crawford --- , South Africa Bruce M Dyer --- , South Africa Azwianewi B Makhado --- , South Africa Leshia Upfold --- , South Africa Peter G Ryan --- , South AfricaLittle has been reported on moult in sulids, including gannets. The Cape Gannet Morus capensis is an endangered seabird endemic to southern Africa. We describe the timing, duration, symmetry and sequence of flight feather moult in Cape Gannets from two... -
Smart specialisation strategies in sub-Saharan Africa: Opportunities, challenges and initial mapping for Côte d’Ivoire
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mafini Dosso --- , Spain Alexander Kleibrink --- , Spain Monika Matusiak --- , SpainThis paper calls for a better integration of place-based, evidence-based and inclusive dimensions in the implementation of the Science, Technology and Innovation (STI) plans and industrial policies in sub-Saharan Africa. To this end, the analysis contrasts with and takes inspiration... -
A strategy to enhance consumer trust in the adoption of mobile banking applications
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Theo Tsokota --- , Zimbabwe Samuel Musungwini --- , Zimbabwe Amanda Mutembedza --- , ZimbabweDespite the popularity of mobile banking applications among banks and a phenomenal increase in Commercial Bank of Zimbabwe (CBZ) customer base of 206.6% since 2009, uptake of mobile banking applications has remained deplorably low with CBZ Touch mobile application recording... -
Endogenous metabolic content of the cutting positions and ndole-3-butyric acid influence rooting of Toona ciliata var. pubescens stem cuttings
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Qiangqiang Cheng --- , China Dejia Ji --- , China Xiaoyan Guo --- , China Honglang Huang --- , China Lu Zhang --- , ChinaToona ciliata var. pubescens (family Meliaceae) is an endangered species of mahogany endemic to China. It is now under Class II protection, and stem cuttings are an important means for its clonal propagation. However, the metabolic changes that occur in... -
Women offenders’ experiences of rehabilitation in a South African correctional centre
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sibulelo Qhogwana --- , South Africa Puleng Segalo --- , South AfricaThis study explored gendered rehabilitation of women in correctional spaces and the systems and structures that recreate inequities in women’s incarceration experiences. Eighteen black women completed in-depth interviews on their offender rehabilitation experiences. Their age ranged from 23 to 69... -
Corporate sustainability and customer loyalty: The role of firm’s green image
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Michelle Frempomaa Frempong --- , China Yinping Mu --- , China Stephen Sarfo Adu-Yeboah --- , China Md Altab Hossin --- , China Richard Amoako --- , ChinaWe aimed to investigate the influence of corporate sustainability on customer loyalty. Participants were 790 customers from mobile telecommunication, retail banking, and the manufacturing sector of the Ghanian economy (female = 42%, age range = 18 to 65 years). The... -
Spawning observations of Pomadasys commersonnii in the marine section of the Knysna estuarine bay, Western Cape, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: EC Butler --- , South Africa A-R Childs --- , South Africa MKS Smith --- , South Africa RM Foster --- , South Africa WM Potts --- , South AfricaKnowledge of the location and timing of spawning events is critical for fisheries management. As is the case for many southern African fishes, the spotted grunter Pomadasys commersonnii was historically thought to reproduce in the coastal waters off KwaZulu-Natal Province... -
Smallholder farmers’ adaptation strategies to mitigate the effect of drought on maize production in OR Tambo District municipality
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Brian Muroyiwa --- , Lesotho Nasiphi Masinda --- , South Africa Abyssinia Mushunje --- , South AfricaThere is evidence that climate variability has affected agriculture and the expectation is that the situation will get worse over time. This study examined smallholder farmers’ adaptation strategies to mitigate the effects of drought on maize production in OR Tambo... -
Macroinvertebrate community structure and diversity in relation to environmental factors in wetlands of the lower Gilgel Abay River catchment, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet --- , Ethiopia Seyoum Mengistou --- , Ethiopia Bikila Warkineh --- , EthiopiaThe influence of environmental factors on the diversity of macroinvertebrates was studied in the wetlands of the Gilgel Abay River (GAR) catchment in Ethiopia. The study was done between September 2017 and March 2018, encompassing both wet and dry seasons... -
Applying legitimacy theory to understand sustainability reporting behaviour within South African integrated reports
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Shelly Herbert --- , South Africa Mark Graham --- , South AfricaSustainability disclosures are frequently included within integrated reports, in order to provide disclosures relating to the capitals identified in the International <IR> Framework (the Framework). South Africa has been at the forefront of integrated reporting, following the guidance of King... -
The utility of serial prolactin sampling in healthy adult volunteers
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Reinhardt Dreyer --- , South Africa Amanda Beukes --- , South Africa Mariza Hoffmann --- , South Africa Wessel Meyer --- , South Africa Ankia Coetzee --- , South AfricaBackground: Stress hyperprolactinemia is a common cause of elevated prolactin (PRL) and often leads to additional investigation and radiation exposure. The results of PRL serial sampling in healthy adult volunteers to determine the utility of delayed collection are reported. -
Managerial ties and access to finance in weak institutional contexts: Does CEO duality matter?
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Tahiru Azaaviele Liedong --- , UK Tazeeb Rajwani --- , UKThough managerial ties are substitutes for the weak market-supporting institutions in developing and emerging countries, little is known about the contingent value of these ties in credit markets. In this study, we disintegrate managerial ties into political and financial ties,... -
Technological characterisation of wood from Australian red cedar after first thinning of a plantation at five years
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Kelvin Techera Barbosa --- , Brazil Andrey Pereira Acosta --- , Brazil Marília Lazarotto --- , Brazil Rafael Beltrame --- , Brazil Claudia Fernanda Lemons e Silva --- , Brazil Claudimar Sidnei Fior --- , BrazilAustralian red cedar (Toona ciliata M. Roem.) is a forest species planted in Brazil especially for lumber production. This study aimed to evaluate technological properties of the wood after selective first thinning of a plantation 5 years after planting. The... -
First assessment of the blue carbon storage of Rhizophora and Bruguiera mangrove stands on the island of Mauritius (western Indian Ocean)
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Phanesh Raghbor --- , Mauritius Linisha Devi Seeruttun --- , Mauritius Chandani Appadoo --- , MauritiusBlue carbon has gained recognition as a strategy to mitigate climate change. Mangroves allow significant amounts of carbon to be sequestered and stored and are considered an important component in the offset of greenhouse gas emissions. Despite this, little is... -
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... -
Working strategically with Big Data in the tourism sector: a qualitative study of twelve European destination management organisations
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Henrik S Pahus --- , Denmark Lars Sunesen --- , DenmarkThis article presents the results of 12 semi-structured in-depth interviews with data experts from destination management organisations across Europe. The analysis revealed three overarching themes concerning the use of Big Data in the tourism sector: (1) size matters when it... -
A modified Shiller's cyclically adjusted price-to-earnings (CAPE) ratio for stock market index valuation in a zero-interest rate environment
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Roberto Catanho --- , South Africa Adrian Saville --- , South AfricaThe cyclically adjusted price-earnings ratio (CAPE) is a tool that has become widely used to predict market returns. However, recently, deterioration in its forecast strength has surfaced. At the same time, global long-term interest rates have declined and are expected... -
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... -
Rainfall-driven nutrient loading affects coastal phytoplankton in the southwestern Indian Ocean: a lagoon at Mauritius Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Soondur --- , Republic of Mauritius R Boojhawon --- , Republic of Mauritius R Lowe --- , Australia D Kaullysing --- , Republic of Mauritius BE Casareto --- , Japan Y Suzuki --- , Japan R Bhagooli --- , Republic of MauritiusThis study aimed to test the effects of rainfall-driven nutrient loading on the microphytoplankton dynamics in the shallow water at Trou aux Biches lagoon on the northwest coast of Mauritius. Changes in density, diversity and estimated productivity of microphytoplankton were... -
Is a sentiment-based trading strategy profitable?
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Karam Kim --- , Republic of Korea Doojin Ryu --- , Republic of Korea Jinyoung Yu --- , Republic of Korea We examine whether sentiment indices predict individual firms’ stock returns and evaluate the performances of sentiment-based trading strategies in the Korean equity market. We find that the sentiment indices (constructed using the principal component analysis (PCA) and overnight stock returns)... -
Presidential communication approaches and the impact on public health: a comparative analysis of three South African presidents’ communication on AIDS and COVID-19
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Nompumelelo Gumede --- University of KwaZulu-Natal, South Africa Emma Durden --- University of KwaZulu-Natal, South Africa Eliza Govender --- University of KwaZulu-Natal, South AfricaThe HIV response in the African continent over past decades demonstrates the potency that the words and actions of political leaders have in either expediting or impeding the implementation and adoption of preventive measures at the individual and community levels... -
The sustainable lifestyle level: How real salary increases affect adequate retirement provision
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Elze-Mari Roux --- , South Africa Johann de Villiers --- , South AfricaThis article studies the effect of real increases in salary on required contribution rates when saving for retirement to maintain a Sustainable Lifestyle Level (SLL). We consider two strategies. The first sets conventional contribution rates, recalculating whenever an increase occurs... -
Tactical asset allocation using the Kalman filter
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Reder van Rooyen --- , South Africa Gary van Vuuren --- , South AfricaTactical asset allocation (TAA) is a dynamic investment strategy which seeks actively to adjust fund allocation to a variety of asset classes by systematically exploiting inefficiencies and temporary imbalances in equilibrium values. This approach contrasts with strategic asset allocation (SAA)... -
Carbohydrate counting in type 1 diabetes mellitus: dietitians’ perceptions, training and barriers to use
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Megan Esmè Dimitriades --- , South Africa Kirthee Pillay --- , South Africa -
Assessing infant and young child feeding priorities to inform the development of a nutrition social and behaviour change communication (SBCC) strategy during a pandemic threat
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: T Turk --- , Pakistan A Poonawala --- , Switzerland S Shulman --- , USA P Sepoloane --- , Botswana -
Corporate sustainability and firm performance in small and medium enterprises in Ghana: Mediating role of green innovation
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Stephen Sarfo Adu-Yeboah --- , People’s Republic of China Yuanchun Jiang --- , People’s Republic of China Michelle Frempomaa Frempong --- , People’s Republic of China Md Altab Hossin --- , People’s Republic of China Richard Amoako --- , People’s Republic of ChinaThis study examined green innovation influences on the relationship between business organisation corporate sustainability and its performance related to market share, profitability, and market positioning. Participants (n = 432) were from the hospitality (n = 138), agribusiness (n = 74), manufacturing (n = 105) and professional services (n = 115)... -
Top management team cognition and strategic decision performance: The mediating role of team conflict
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Meng Chenli --- , ChinaThis study assessed the influence of top team conflict on top management team (TMT) cognition (ability and need), strategic decision-making (quality and satisfaction), and differentiating between task conflict and emotional conflict. Participants were from 63 Chinese enterprises (n = 226; female= 45.58%;... -
Nitrogen mineralisation and N2O emissions in pure and mixed-species plantations of Eucalyptus urograndis and Acacia mangium
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Felipe Martini Santos --- , Brazil Fabiano de Carvalho Balieiro --- , Brazil Danilo Henrique dos Santos Ataíde --- , Brazil Pedro Vaz da Rocha --- , Brazil Bruno JR Alves --- , Brazil Guilherme M Chaer --- , BrazilWe hypothesised that N inputs to the soil from residues of adult trees of Acacia mangium Willd. increase soil nitrate availability and consequently induce higher nitrous oxide (N2O) fluxes, irrespective of being in pure or mixed stands with Eucalyptus. A... -
New records and a notable observation of potentially predator-avoiding amplectic behaviour in Boophis erythrodactylus from Madagascar
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Robin Kurian Abraham --- Biodiversity Institute and Department of Ecology and Evolutionary Biology, University of Kansas, United States Carl Richard Hutter --- Biodiversity Institute and Department of Ecology and Evolutionary Biology, University of Kansas, United StatesThe Red-fingered Bright-eyed Frog Boophis erythrodactylus is an endemic, range-restricted arboreal frog found only in the eastern rainforests of Madagascar. We report new localities for this species, along with locality records for its sister species B. tasymena, including localities where... -
The Freshwater Biodiversity Information System (FBIS) – mobilising data for evaluating long-term change in South African rivers
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Helen Dallas --- , South Africa Jeremy Shelton --- , South Africa Tim Sutton --- , South Africa Dimas Tri Cuptura --- , South Africa Mohammed Kajee --- , South Africa Nancy Job --- , South AfricaAccess to long-term biodiversity datasets is vital for monitoring, managing and protecting freshwater ecosystems. Detecting critical ecosystem changes, such as losing unique biodiversity and ecosystem services, is dependent on access to data. A wealth of biodiversity data exists for river... -
A case study review and reasonability assessment of the foreign employment income tax exemption threshold in section 10(1)(o)(ii) of the Income Tax Act
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Kgonthe Sebashe --- , South Africa Henriette Lynette Erasmus --- , South Africa Magdalena Maria Erasmus --- , South AfricaThis research paper, by means of a case study, evaluated whether the foreign employment income tax exemption threshold in section 10(1)(o)(ii) of the Income Tax Act achieved its objectives: first, limiting the impact of the amendment to the exemption in... -
Effects of form, fineness and placement of lime with and without soil tillage on barley and canola growth and development
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: JR van der Nest --- , South Africa AG Hardie --- , South Africa J Labuschagne --- , South Africa PA Swanepoel --- , South AfricaNo-tillage systems and slow movement of surface-applied limestone can lead to stratification of soil acidity. Incorporation of lime by tilling soil is not preferred by producers following conservation agriculture practices. There is limited research on ways to facilitate lime movement... -
An assessment of the medium-term reproductive success of an extralimital white rhinoceros population
Item type: Journal Article • Journal: African Zoology • Authors: Anja Truter --- , South Africa Nokubonga Mgqatsa --- , South Africa Daniel M Parker --- , South AfricaThe white rhinoceros (Ceratotherium simum) is threatened primarily due to continued poaching for its horns. In South Africa, partly to promote the conservation of the species, white rhinos have been introduced into areas where they did not occur historically (i.e... -
Dynamic pricing and perceived fairness: a case study at a hotel on the West Frisian island of Vlieland, The Netherlands
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Stephanie Kool --- NHL Stenden University of Applied Sciences, The Netherlands Rodney Westerlaken --- NHL Stenden University of Applied Sciences, The Netherlands Javed Suleri --- NHL Stenden University of Applied Sciences, The NetherlandsThe use of dynamic pricing strategies can have a tremendous impact on the hospitality industry. Understanding the variety in the type of customers and the perceptions of customers concerning the fairness of dynamic pricing is essential. This study aimed to... -
Drivers of change in vegetation and soil in the Gamka Karoo: grazing versus rainfall
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: N Saayman --- , South Africa CD Morris --- , South Africa R Swart --- , South Africa JC Botha --- , South AfricaThe Gamka Karoo is a low-lying vegetation type in the semi-arid Nama Karoo in the south-western part of South Africa with extensive rangelands used for livestock ranching and wildlife. Although the Nama Karoo is generally resilient to grazing and most... -
The problem with non-separated multipoint-integral conditions for high-order differential equations and a new general solution
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Anar T. Assanova --- Institute of Mathematics and Mathematical Modeling, Kazakhstan Askarbek E. Imanchiyev --- Institute of Mathematics and Mathematical Modeling, KazakhstanThe problem with non-separated multipoint-integral conditions for high-order differential equations is considered. An interval is divided into m parts, the values of a solution at the beginning points of the subintervals are considered as additional parameters, and the high-order differential... -
A Big Data strategy to reinforce self-sustainability for pharmaceutical companies in the digital transformation era: A case study of Egyptian pharmaceutical companies
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mahmoud Elsayed Hassanin --- Ahram Canadian University, Egypt Mohamed Ahmed Hamada --- International IT University, KazakhstanThe Big Data-driven economy has emerged, and data is known as the new petroleum of the current century. Big Data (BD) analytics can play an essential role in building a self-sustainable competitive advantage for the pharmaceutical industry by feeding pharmaceutical... -
Learning and studying during the pandemic: A comparison between students' learning and study strategy orientations before and during the COVID-19 period
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Henry D. Mason --- Tshwane University of Technology, South Africa Ane Craven --- Tshwane University of Technology, South Africa Megan Fredericks --- Tshwane University of Technology, South AfricaThis study compared first-year university students' learning and study strategy (LSS) orientations before COVID-19 and during COVID-19. We analysed data from 1 632 eligible frrst-year university students who completed the Learning and Study Strategies Inventory (LASSI). Mean and proportion comparison... -
Psychological flexibility as a moderator of the relationship between HIV-related stigma and resilience among HIV/AIDS patients
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Chinenye Joseph Aliche --- University of Nigeria, Nigeria Chuka Mike Ifeagwazi --- University of Nigeria, Nigeria Chisom Christopher Ozor --- University of Nigeria, NigeriaHIV-related stigmatisation is common in many parts of the world and is experienced by all categories of people living with HIV and AIDS (PLWHA). Although the negative consequences of HIV-related stigmatisation on the resilience of PLWHA is well documented, little... -
Multidimensional Kantorovich modifications of exponential sampling series
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Tuncer Acar --- Selcuk University, Turkey Sadettin Kursun --- Selcuk University, Turkey Metin Turgay --- Selcuk University, TurkeyThis paper is devoted to construction of multidimensional Kantorovich modifications of exponential sampling series, which allows to approximate suitable measurable functions by considering their mean values on just one section of the function involved. Approximation behaviour of newly constructed operators... -
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,... -
An enumeration of orphans and analysis of the problems and wishes of orphans: the case of Kariba, Zimbabwe
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Jaqualine F Mangoma --- University of Zimbabwe Lake Kariba Research Station, Moses J Chimbari --- University of Botswana's Harry Oppenheimer Okavanga Research Centre, Elmon Dhlomo --- University of Zimbabwe Lake Kariba Research Station,In southern Africa, HIV and AIDS accounts for the largest proportion of orphans. Very often the orphaned children become destitute, and young girls in particular become more vulnerable to HIV and AIDS as they try to fend for the rest... -
Reaching the hearts and minds of illiterate women in the Amhara highland of Ethiopia: Development and pre-testing of oral HIV/AIDS prevention messages
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Gebeyehu W Bogale --- Educational Media Agency, Ethiopia Henk Boer --- University of Twente, The Netherlands Erwin R Seydel --- University of Twente, The NetherlandsIn the style of radio programmes, we developed three episodes of audio HIV prevention education for illiterate women in Ethiopia. We used social-oriented presentation formats, such as discussion between women on HIV prevention, and expert-oriented presentation formats, such as an... -
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... -
HIV-related symptoms and management in HIV and antiretroviral therapy patients 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 --- , South AfricaAim: The study aimed to determine the prevalence, predictors, and self-reported management of HIV- or ARV-related symptoms among HIV patients prior to antiretroviral therapy (ART) and over three time points while receiving ART in KwaZulu-Natal, South Africa. Method: A total... -
Prevalence and mitigation strategies of HIV/AIDS infection risks in Namibian tertiary education institutional hostels
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Roderick F. Zimba --- , Namibia Gilbert N. Likando --- , NamibiaThe purpose of this study was to investigate risk factors that could promote HIV infection amongst adolescents and young adults living in tertiary educational institutional hostels in Namibia. Employing structured questionnaires and focus group discussions, we sought to answer questions... -
HIV status disclosure rate and reasons for non-disclosure among infected children and adolescents in Enugu, southeast Nigeria
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: A.C. Ubesie --- , , Nigeria K.K. Iloh --- , , Nigeria I.J. Emodi --- , , Nigeria N.S. Ibeziako --- , , Nigeria I.N. Obumneme-Anyim --- , , Nigeria O.N. Iloh --- , , Nigeria A.C. Ayuk --- , , Nigeria C.J. Anikene --- , , Nigeria J.E. Enemuo --- , , NigeriaAims: To determine the rate of HIV status disclosure, caregivers’ reasons for non-disclosure, and factors influencing disclosure among a sample of HIV-infected children in Enugu, southeast Nigeria. Methods: Data were collected prospectively via a questionnaire on HIV-infected children and their... -
Do rinkhals (Hemachatus haemachatus) choose to defecate near water?
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: ShirleenL. Lazenby --- University of the Witwatersrand, South Africa GrahamJ. Alexander --- University of the Witwatersrand, South Africa -
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... -
Phylogenetic relationships of African caecilians (Amphibia: Gymnophiona): Insights from mitochondrial rRNA gene sequences
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mark Wilkinson --- The Natural History Museum, UK SimonP. Loader --- The Natural History Museum, UK DavidJ. Gower --- The Natural History Museum, UK JonathanA. Sheps --- University of Glasgow, Scotland, UK BernardL. Cohen --- University of Glasgow, Scotland, UKAfrica (excluding the Seychelles) has a diverse caecilian fauna, including the endemic family Scolecomorphidae and six endemic genera of the more cosmopolitan Caeciliidae. Previous molecular phylogenetic studies have not included any caecilians from the African mainland. Partial 12S and 16S... -
Differences in resting metabolic rates of two southern African tortoises: Psammobates oculiferus and Geochelone pardalis
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Michael Scantlebury --- University of Pretoria, South Africa Peter Minting --- Ayrshire Rivers Trust, UKEnergy metabolism varies considerably between different groups of endotherms, yet there is little or no reported variation among extant groups of reptiles. We measured lower resting metabolic rates (RMRs) in Kalahari tent tortoises (Psammobates oculiferus) than in sympatric Leopard tortoises... -
Revalidation of Phrynobatrachus maculiventris Guibé & Lamotte, 1958 and description of its aposematic coloured tadpole
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Mark‐Oliver Rödel --- Humboldt University Berlin, Germany Laura Sandberger --- Humboldt University Berlin, Germany Néma‐Soua Loua --- Société des Mines de Fer de Guinée, Republic of Guinea Joseph Doumbia --- Université de Conakry, Annika Hillers --- Humboldt University Berlin, GermanyPhrynobatrachus maculiventris Guibé & Lamotte, 1958 is a valid species. Herein we clarify its taxonomic status, re‐describe it, and provide the first description of its tadpole. The tadpoles’ specific identity was assessed through DNA barcoding. Phrynobatrachus maculiventris adults differ from... -
Assimilation efficiency and gut passage time in an African elapid snake, Hemachatus haemachatus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: GrahamJ. Alexander --- University of the Witwatersrand, South Africa ShirleyA. Hanrahan --- University of the Witwatersrand, South Africa Duncan Mitchell --- University of the Witwatersrand, South AfricaWe measured apparent assimilation efficiency (AAE) and gut passage time in the African elapid snake Hemachatus haemachatus under laboratory conditions. AAE was dependent on food type, being 89.8% when snakes were fed frogs and 82.8% when fed mice. Differences in... -
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... -
The effects of temperature on oxygen consumption in the lizard Pseudocordylus melanotus from Suikerbosrand Nature Reserve
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Suzanne McConnachie --- , , South AfricaIn reptiles, metabolic rate (MR) is affected by many different factors, including temperature, sex, body size and digestive state. Standard MR was measured for the lizard Pseudocordylus melanotus over a range of temperatures (20, 22, 25, 30 and 32°C). I... -
Key role-players’ perceptions of the current salt legislation in South Africa: opportunities and challenges
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Marzanne van Loggerenberg --- Stellenbosch University, South Africa Bianca van der Westhuizen --- University of South Africa, South Africa Nelene Koen --- Stellenbosch University, South Africa -
Central bank policy rate announcements and high-frequency intra-day benchmark stock returns reaction dynamics: Evidence from South Africa
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Cyril May --- University of the Witwatersrand, South Africa Tatenda Ngandu --- University of the Witwatersrand, South AfricaThis paper investigates the chronological impact of South African Reserve Bank (SARB) repo rate announcements on the Financial Times Stock Exchange/Johannesburg Securities Exchange (FTSE/JSE) All Share Index (ALSI) returns and returns volatility. Covering the period 2012–2021, the study employs the... -
Measuring corporate failure risk: Does long short-term memory perform better in all markets?
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Hyeongjun Kim --- Yeungnam University, Korea Hoon Cho --- Korea Advanced Institute of Science and Technology, Korea Doojin Ryu --- Sungkyunkwan University, KoreaRecently, various corporate failure prediction models that use machine learning techniques have received considerable attention. In particular, using a sequence of a company's historical information, rather than just the most recent information, yields better predictive performance by adopting recurrent neural... -
Trait anger and aggression among male violent offenders: The mediating effect of sadistic impulse and the moderating effect of emotion regulation
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Qinhong Xie --- Zunyi Medical University, China Bingtao Zhou --- China University of Political Science and Law, China Taiyong Bi --- Zunyi Medical University, China Bo Yang --- China University of Political Science and Law, China Hui Kou --- Zunyi Medical University, ChinaWe investigated the mediating role of sadistic impulse and the moderating role of emotion regulation strategy in the relationship between trait anger and aggressive behaviour in violent offenders. A total of 492 male violent offenders (mean age = 34.06 years,... -
Movement patterns and growth rate of Scotsman Polysteganus praeorbitalis (Sparidae) tagged in the Pondoland Marine Protected Area, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: BQ Mann --- Oceanographic Research Institute, South Africa WN Dalton --- Oceanographic Research Institute, South Africa GL Jordaan --- Oceanographic Research Institute, South Africa R Daly --- Oceanographic Research Institute, South AfricaA tag-recapture study was undertaken on Polysteganus praeorbitalis in the Pondoland Marine Protected Area (PMPA) on the east coast of South Africa. A total of 1 042 fish were tagged over a period of 16 years and 255 individuals (24.5%)... -
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... -
A photo-identification-based assessment model of southern right whales Eubalaena australis surveyed in South African waters, with a focus on recent low counts of mothers with calves
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Brandão --- University of Cape Town, South Africa A Ross-Gillespie --- University of Cape Town, South Africa E Vermeulen --- University of Pretoria, South Africa DS Butterworth --- University of Cape Town, South AfricaPhoto-identification data for southern right whale cow–calf pairs on the South African calving grounds provide one of the longest abundance time-series for any whale population worldwide. Following a very steady increase from a heavily depleted state, surveys since 2015 reflect... -
Representing polynomials by degenerate Bernoulli polynomials
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Dae San Kim --- Sogang University, Republic of Korea Taekyun Kim --- Kwangwoon University, Republic of KoreaIn this paper, we consider the problem of representing any polynomial in terms of the degenerate Bernoulli polynomials and more generally of the higher-order degenerate Bernoulli polynomials. We derive explicit formulas with the help of umbral calculus and illustrate our... -
Preliminary revision and validation of the Human Resource Attributions Scale
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Haitao Zheng --- , China Xinqi Lin --- Renmin University of China, China He Ding --- North China Electric Power University, China Weilin Su --- Capital Normal University, ChinaThis study aimed to revise and validate the Human Resources Attributions (HRAs) scale for use in a Chinese context. 480 Chinese employees from a financial organisation completed the survey (female = 55.3%; bachelor’s degree = 70%; mean age = 36.4... -
The role of experimental perches on the hover and perch hunting preferences of the Pied Kingfisher Ceryle rudis
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Gerard Malan --- Tshwane University of Technology, South Africa Marco Heimstadt --- Tshwane University of Technology, South AfricaThe Pied Kingfisher Ceryle rudis is a fishing kingfisher that employs two hunting modes. The bird can either hunt from a perch or hover and then dive into the water. The former method is energetically cheap but limits prey searching... -
Precision agriculture and the prospects of space strategy for food security in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Lere Amusan --- North West University, South Africa Samuel Oyewole --- North West University, South AfricaPrecision agriculture generally refers to the methods of crop, livestock and fish farming that are meant to eliminate or minimize uncertainty and maximize products with relative accuracy that matches predetermined expectations. Amidst these, the relevance of space assets such as... -
Corporate social responsibility and employee knowledge sharing: The roles of organisational trust and exchange quality
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Si Qian --- Beijing Technology and Business University, China Ke Ma --- Beijing Technology and Business University, China Siqi Guo --- Beijing Technology and Business University, ChinaDrawing on the social exchange theory, this study aimed to examine the relationship between perceived corporate social responsibility (CSR) and employee knowledge-sharing behaviour, including the roles organisational trust and exchange quality play in that relationship. Survey data were collected from... -
Intercropping forage cactus with sorghum affects the morphophysiology and phenology of forage cactus
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Alexandre Maniçoba da Rosa Ferraz Jardim --- Federal Rural University of Pernambuco, Brazil Luciana Sandra Bastos de Souza --- Federal Rural University of Pernambuco, Brazil Cleber Pereira Alves --- Federal Rural University of Pernambuco, Brazil Jandis Ferreira Nunes de Araújo --- Federal Rural University of Pernambuco, Brazil Carlos André Alves de Souza --- Federal Rural University of Pernambuco, Brazil Antonio Gebson Pinheiro --- Federal Rural University of Pernambuco, Brazil Gherman Garcia Leal de Araújo --- , Brazil Fleming Sena Campos --- Federal Rural University of Pernambuco, Brazil José Nildo Tabosa --- Agronomic Institute of Pernambuco, Brazil Thieres George Freire da Silva --- Federal Rural University of Pernambuco, BrazilThe aim of this study was to evaluate morphophysiological indices, phenology and cutting time of forage cactus (Opuntia and Nopalea spp.) clones intercropped with sorghum cultivars (Sorghum bicolor). The experiment was carried out from 2017 to 2018, in two cropping... -
Morphological and physiological responses of Calobota sericea plants subjected to water limitation and subsequent rewatering
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois Müller --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa Lincoln Raitt --- University of the Western Cape, South Africa Lilburne Cyster --- University of the Western Cape, South Africa Samson Chimphango --- University of Cape Town, South Africa M Igshaan Samuels --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa Clement Cupido --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa J Stephen Boatwright --- University of the Western Cape, South AfricaCalobota sericea is a native legume of South Africa, confined to the water-limited rangelands, and it has recently been prioritised for additional characterisation regarding its pasture potential. In this study, we examined the growth characteristics of C. sericea under glasshouse... -
On Yang-Baxter groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: A. Ballester-Bolinches --- Guangdong University of Education, People’s Republic of China R. Esteban-Romero --- Universitat de València, Spain P. Jiménez-Seral --- Universidad de Zaragoza, Spain V. Pérez-Calabuig --- Universitat de València, SpainA group is said to be an involutive Yang-Baxter group, or simply an IYB-group, if it is isomorphic to the permutation group of an involutive, non-degenerate set-theoretic solution of the Yang-Baxter equation. In this paper, Yang-Baxter groups (YB-groups for short)... -
The ecology of coastal wetland ponds created by diamond mining in southern Namibia. 3. Fish
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Maritz --- University of Cape Town, South Africa CG Attwood --- University of Cape Town, South Africa D Pillay --- University of Cape Town, South Africa GM Branch --- University of Cape Town, South AfricaDiamond mining in southern Namibia creates seawalls that hold the ocean at bay, yet seawater overwashes or seeps through to fill landward excavated areas, forming numerous coastal ponds that reach 380 000 m2. These ponds span ages of 1–40 years,... -
Provider perspectives on antiretroviral therapy adherence among psychiatric inpatients in Botswana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Maria Albin Qambayot --- University of KwaZulu-Natal, South Africa Sarita Naidoo --- University of KwaZulu-Natal, South AfricaBackground: Optimal adherence to antiretroviral therapy (ART) is crucial for the effective management of HIV. Mental disorders often co-occur with HIV infection which often compromises ART adherence. Little is known about ART adherence in psychiatric settings in sub-Saharan Africa. -
The opposite of injectivity by proper classes
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Pınar Aydoğdu --- Hacettepe University, Turkey Yılmaz Durğun --- Çukurova University, TurkeyProper classes (or exact structures) offer rich research topics due to their important role in category theory. Motivated by the studies on opposite of injective modules, we introduce a new approach to opposed to injectivity in terms of injectively generated... -
The existence and uniqueness result of entropy solutions for a p(·)-Laplace operator problem in weighted Sobolev spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jiabin Zuo --- Guangzhou University, China Abdelali Sabri --- Hassan 1er University, MoroccoThe paper is concerned with the existence and uniqueness result of entropy solutions for a degenerate elliptic p(·)-Laplacian problem by using the regularization approach and theory of weighted Sobolev spaces with variable exponents. -
Relevance and therapeutic implication of macroprolactinemia detection using PEG 6000 in women of childbearing age with hyperprolactinemia: experience at a tertiary hospital
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Anne Ongmeb Boli --- Endocrinology and Metabolic Disease Unit, Yaoundé Central Hospital, Cameroon Martine Claude Etoa Etoga --- Endocrinology and Metabolic Disease Unit, Yaoundé Central Hospital, Cameroon Francine Mekobe Mendane --- University of Yaoundé I, Cameroon Charly Feutseu --- Biotechnology Centre, University of Yaoundé I, Cameroon Eloumba Mbono Samba --- Endocrinology and Metabolic Disease Unit, Yaoundé Central Hospital, Cameroon Amazia Falmata --- University of Bamenda, Cameroon Arnaud Manga Ndi --- Endocrinology and Metabolic Disease Unit, Yaoundé Central Hospital, Cameroon Jean-Claude Katte --- Endocrinology and Metabolic Disease Unit, Yaoundé Central Hospital, Cameroon Mesmin Dehayem --- Endocrinology and Metabolic Disease Unit, Yaoundé Central Hospital, Cameroon Vicky Jocelyn Ama Moor --- University of Yaoundé I, Cameroon Jean Claude Mbanya --- Endocrinology and Metabolic Disease Unit, Yaoundé Central Hospital, Cameroon Eugène Sobngwi --- Endocrinology and Metabolic Disease Unit, Yaoundé Central Hospital, Cameroon -
Host communities’ infrastructural development expectations of multinational mining companies in Ghana’s mining industry
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Stanford Nartey --- Ghana Institute of Management and Public Administration, Ghana Franklyn A. Manu --- Ghana Institute of Management and Public Administration, GhanaThis paper, through an ethnographic research approach, examines the infrastructural development expectations that host communities have of multinational mining companies (MNMCs) and how these expectations influence corporate-community relationships in two of Ghana’s mining districts. Using data triangulation from multiple stakeholder... -
Environmental stressors influence the biological water quality of a lotic system in southwestern Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EO Akindele --- Obafemi Awolowo University, Nigeria SA Olaniyan --- Institute of Ecology and Environmental Studies, Obafemi Awolowo University, Nigeria AM Adedapo --- Obafemi Awolowo University, NigeriaDeforestation in the Afrotropical realm is extensively encroaching on riparian corridors, causing increasingly negative impacts on freshwater biota. This study aimed to assess the biological water quality of an Afrotropical river in southwestern Nigeria whose riparian corridor is threatened by... -
Habitat scale and seasonality influence macroinvertebrate functional feeding groups in a tropical Kenyan montane stream
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Frank O Masese --- University of Eldoret, Kenya Augustine Sitati --- University of Eldoret, Kenya Mourine J Yegon --- University of Eldoret, Kenya Elizabeth W Wanderi --- University of Eldoret, Kenya Phillip O Raburu --- University of Eldoret, KenyaHabitat quality and diversity strongly influence the composition of macroinvertebrate communities in lotic ecosystems. We evaluated the functional organization of macroinvertebrates in response to changes in habitat type and seasonality in the Afromontane Moiben River in western Kenya. In-stream substrate... -
Rainfed-based production of Megathyrsus maximus in sub-Saharan Africa: the case of the semi-arid environment of Sudan
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Hussein I Mohamed --- , Sudan Shamseddin M Ahmed --- Water Management and Irrigation Institute, University of Gezira, Sudan Adil D Mohamed --- Water Management and Irrigation Institute, University of Gezira, SudanThe performance of rainfed-based Megathyrsus maximus (syn. Urochloa maxima and Panicum maximum) was investigated in the semi-arid pastures of Sudan. Split-plot complete design experiments with three replications were applied for two consecutive seasons (2020–2021). The treatments were two in situ... -
Preliminary investigation into deducing breeding success of African Penguins Spheniscus demersus from automated transponder reader data to reduce disturbance
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mpumalanga Mnyekemfu --- University of the Western Cape, South Africa Peter J Barham --- University of the Western Cape, South Africa Barbara Barham --- , United Kingdom Lauren Waller --- University of the Western Cape, South Africa Katrin Ludynia --- University of the Western Cape, South Africa Gavin W Maneveldt --- University of the Western Cape, South AfricaThe Endangered African Penguin Spheniscus demersus is in serious decline, with the total population falling at a rate of ∼5% per annum. The need to carry out regular monitoring to collect demographic and phenological data to assist in the planning... -
Examining swap butterfly risk premia in South Africa
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Sanveer Hariparsad --- University of Pretoria, South Africa Eben Maré --- University of Pretoria, South AfricaThis paper studies a long butterfly strategy (which is immune to parallel curve shifts but exposed to non-parallel curve shifts) on the South African interest rate swap curve. Ten swap butterfly risk factors are identified using monthly South African swap... -
Smallness in topology
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jiří Adámek --- Czech Technical University, Czech Republic Miroslav Hušek --- Charles University, Czech Republic Jiří Rosický --- Masaryk University, Czech Republic Walter Tholen --- York University, CanadaQuillen’s notion of small object and the Gabriel-Ulmer notion of finitely presentable or generated object are fundamental in homotopy theory and categorical algebra. Do these notions always lead to rather uninteresting classes of objects in categories of topological spaces, such... -
Quantile dependencies across BRICS currency markets in time of crisis: Analysis of the Russia–Ukraine war
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Oluwatomisin J. Oyewole --- Federal University of Agriculture, Nigeria Ismail O. Fasanya --- University of the Witwatersrand, South Africa Mamdouh Abdulaziz Saleh Al-Faryan --- School of Accounting, Economics and Finance, Faculty of Business and Law, University of Portsmouth, UK & Consultant in Economics and Finance, Saudi ArabiaThis paper examines the spillovers across BRICS currency markets during the Russia–Ukraine war. We observe that the connectedness across the BRICS currency markets is stronger during than before the war and the average-based connectedness framework shows a moderate level of... -
Diversity and abundance of avifauna in the Suba Forest area, central Ethiopia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Gemechis B Mosisa --- Haramaya University, Ethiopia Nega Tassie --- Bahir Dar University, Ethiopia Sintayehu W Dejene --- Haramaya University, EthiopiaBirds are one of the best-described taxa, but detailed knowledge about most bird species in Ethiopia remains rare, which hinders the development and evaluation of conservation strategies in the region. In this study, we estimated bird species diversity and abundance... -
Challenges and coping strategies of parents of children with autism spectrum disorder in Eswatini
Item type: Journal Article • Journal: Journal of Child & Adolescent Mental Health • Authors: Fanele Nkonyane --- , Eswatini Thavanesi Gurayah --- , South Africa Thanalutchmy Lingah --- , South AfricaBackground: Research shows that the debilitating effects of autism spectrum disorder (ASD) not only have an impact on the child, but on the parents and caregivers as well. This study aimed to explore the challenges and coping strategies of parents... -
Comparison of single vs composite soil electrical apparent conductivity-directed samples of irrigated soils for inorganic nitrogen estimation with electromagnetic induction sensors
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: --- University of the Free State, South Africa --- University of the Free State, South Africa --- University of the Free State, South Africa --- University of the Free State, South AfricaThe management of soil can be improved by precision agriculture. A way to achieve this is by quantifying NH4+–N and NO3−–N in soil. The sampling of soil for quantifying these N species is a laborious task. Electromagnetic induction (EMI) sensors... -
The effect of employees’ CSR engagement on work outcomes: Empirical evidence from Ethiopia
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Saleamlak Mola --- Addis Ababa University, Ethiopia Michael A. Abebe --- The University of Texas Rio Grande Valley, USAIn this study, we examine the effect of employees’ CSR engagement on work outcomes. Drawing insights from social exchange theory, we propose that employees’ CSR engagement is likely to positively affect their job satisfaction and organizational commitment while reducing turnover... -
Fine-scale drivers of extinction risk: tadpole occupancy dynamics of the Table Mountain Ghost Frog (Heleophryne rosei)
Item type: Journal Article • Journal: African Zoology • Authors: --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South Africa --- University of Cape Town, South Africa --- , South Africa --- , South AfricaOver the last four decades much progress has been made towards recognising causes of global amphibian declines, but knowledge of fine scale drivers, particularly for specialised species, remains poor, inhibiting conservation effectiveness. The case of the Table Mountain Ghost frog... -
Macrobenthic fauna of the Agulhas Bank shelf edge
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Brandt --- University of Cape Town, South Africa N Karenyi --- University of Cape Town, South Africa K Sink --- South African National Biodiversity Institute (SANBI), South AfricaThe deep sea (>200m depth) off South Africa is largely unexplored, with most benthic macrofauna samples limited to depths shallower than 100m. The benthic infaunal diversity of the Agulhas Bank shelf edge has not yet been studied. We analysed seven... -
Nutritional properties and in vitro gas production in cactus pear (Opuntia stricta) and cassava (Manihot esculenta) shoot silages
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: --- Universidade Federal do Vale do São Francisco, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- Universidade Federal do Vale do São Francisco, Brazil --- Universidade Estadual do Sudoeste da Bahia, Brazil --- Universidade Federal do Tocantins, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- , Brazil --- Universidade Federal do Maranhão, Brazil --- Universidade Federal do Vale do São Francisco, BrazilThis study evaluated the effects of different inclusion levels of cactus pear (Opuntia stricta) (at 0%, 15%, 30% or 45% on fresh matter basis) ensiled with shoots of cassava (Manihot esculenta) on the mineral nutrients, carbohydrates fractionation, nitrogen compounds and... -
Influence of groups of points on estimates of the parameters of moult
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Les G Underhill --- University of Cape Town, South Africa Tanya Scott --- University of Cape Town, South AfricaThe Underhill–Zucchini model of avian moult is a statistical simplification for the analysis of primary moult, a complex biological system in birds. As with all such models, conclusions can be biased if a subset of the data used to fit... -
Quantifying the tax compliance costs of individual taxpayers in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Karen Stark --- University of South Africa, South Africa Sharon Smulders --- University of South Africa, South Africa Elza Odendaal --- University of South Africa, South AfricaThe aim of the study was to quantify the total tax compliance costs (TCC) of individual taxpayers in South Africa for the 2017 and 2018 years of assessment as no studies were found that comprehensively quantified these costs in South... -
Delayed rooting hormone application and stem cutting collection time improved Flacourtia indica rooting ability and root growth
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Simon A Mng’omba --- Lilongwe University of Agriculture and Natural Resources, MalawiFlacourtia indica (Burm.f.) Merr. is an important fruit and medicinal tree in Southern Africa. Efforts to achieve early fruiting have failed with juvenile propagules (planting materials) such as seed. Assessing rooting ability of mature (fruit bearing) F. indica stem cuttings... -
Covid-19 pandemic and mobility strategies of Chadian roadside vendors in Kousseri, Cameroon
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Robi Layio --- University of Maroua, CameroonThe movement of people between N’Djamena (Chad) and Kousseri (Cameroon) has drastically increased since the construction of the Nguéli Bridge linking the two cities in 1985. This massive movement of people came to a sudden halt in 2020 when the... -
Farmers’ choices and factors driving adoption of climate change adaptation strategies in saline coastal area of Bangladesh
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mst. Esmat Ara Begum --- Bangladesh Agricultural Research Institute, Bangladesh Md. Abdur Rashid --- Bangladesh Agricultural Research Institute, Bangladesh Mohammad Ismail Hossain --- Bangladesh Agricultural University, Bangladesh Md. Anower Hossain --- Bangladesh Agricultural Research Institute, Bangladesh Md. Harunor Rashid --- Bangladesh Agricultural Research Institute, Bangladesh Mustafa Kamal Shahadat --- Bangladesh Agricultural Research Institute, Bangladesh Mohammed Mainuddin --- Water Security Program, CSIRO Environment, AustraliaGrowing climate change adaptation issues are driving the demand for efficient solutions in the agriculture sector, which will improve farmers’ livelihoods and economic situations. This study examined the perceptions of major climate risks and factors driving adoption of climate adaptation... -
Comparison of the effectiveness of mined and by-product South African gypsums and other calcium sources for soil sodicity remediation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marina du Plessis --- Stellenbosch University, South Africa Pieter A Swanepoel --- Stellenbosch University, South Africa Ailsa G Hardie --- Stellenbosch University, South AfricaStudies evaluating the effectiveness of South African gypsum sources are scarce or outdated because of newly introduced products, such as granulated and liquid gypsums. The efficacy of calcium (Ca) nitrate and micro-fine (MF) calcitic limes in comparison to gypsums has... -
Participatory establishment of Cenchrus ciliaris forage grass among pastoralists in a semi-arid rangeland area of eastern Tanzania
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Onesmo Damian Ngenzi --- Sokoine University of Agriculture, Tanzania Peter Rogers Ruvuga --- , Tanzania George Mutani Msalya --- Sokoine University of Agriculture, Tanzania David Dawson Maleko --- Sokoine University of Agriculture, TanzaniaIn the semi-arid areas of Africa many pastorallsts move their livestock to find better grazing when forage is scarce during the dry season. However, the practice of forage cultivation can sustain fodder supply for effective livestock feeding during these times... -
Does stock market liberalisation reduce earnings management? Evidence from China
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Chen Song --- , China Leqin Chen --- Shenzhen Technology University, ChinaThis paper employs the Stock Connect programme to examine the impact of stock market liberalisation on the earnings management activities of listed firms in China. Using the time-varying difference-in-difference model, we find that both accrual-based and real earnings management activities... -
Existence and regularity results for a degenerate elliptic nonlinear equation on weighted Sobolev spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Mohsen Alimohammady --- University of Mazandaran, Iran Carlo Cattani --- University of Tuscia, Italy Morteza Koozehgar Kalleji --- Arak University, IranThis paper deals with the existence of many solutions a degenerate weighted elliptic equation which its the number of solutions depend on degeneracy term a i.e., the number of subdomains of Ω\a −1(0) whose boundary is made by submanifolds with... -
Dynamic capability and competitive advantage of event management ventures in Kenya
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Rebecca Chelagat Cheruon --- Moi University, Kenya Jacqueline Cheptepkeny Korir --- Moi University, KenyaEvent management in the hospitality industry came into being because many corporate firms, families and friends asked hotels to organise their gatherings. For corporate firms, these events are considered training programmes, meetings, or conferences. For families, events include weddings, birthday... -
Further insights into killer whales Orcinus orca preying on white sharks Carcharodon carcharias in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Towner --- Rhodes University, South Africa P Micarelli --- University of Siena, Italy D Hurwitz --- , South Africa MJ Smale --- Nelson Mandela University, South Africa AJ Booth --- Rhodes University, South Africa C Stopforth --- , South Africa E Jacobs --- , South Africa FR Reinero --- Sharks Studies Centre – Scientific Institute, Italy V Ricci --- Sharks Studies Centre – Scientific Institute, Italy A Di Bari --- Sharks Studies Centre – Scientific Institute, Italy S Gavazzi --- Sharks Studies Centre – Scientific Institute, Italy G Carugno --- Sharks Studies Centre – Scientific Institute, Italy M Mahrer --- Claremont McKenna College, United States E Gennari --- Rhodes University, South AfricaPhotography and video footage, captured by researchers and tourists on board two vessels, provided insights into the predation techniques employed by an adult male killer whale Orcinus orca in Mossel Bay, South Africa. The incapacitation of its prey, a juvenile... -
Factors affecting smallholder farmers’ local knowledge-based adaption to build resilience in Wolaita zone, Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Workneh Fanta --- Wolaita Sodo University, Ethiopia Pat Gibbons --- University College Dublin (UCD), Ireland Berhanu Kuma --- Wolaita Sodo University, EthiopiaThis study aims to identify factors affecting local adaptation strategies smallholder farmers are practising to adapt multiple stresses. Primary data were collected from 400 randomly sampled households from six districts of Wolaita zone by face-to-face interviews, focus group discussions, and... -
New distribution records and population density of the Critically Endangered Tarzan Chameleon (Calumma tarzan), eastern Madagascar
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Alain JV Rakotondrina --- Madagasikara Voakajy, Madagascar Raphali R Andriantsimanarilafy --- Madagasikara Voakajy, Madagascar Hanta J Razafimanahaka --- Madagasikara Voakajy, Madagascar Achille P Raselimanana --- , Madagascar Rikki Gumbs --- Zoological Society of London, United Kingdom Caleb Ofori-Boateng --- Zoological Society of London, United Kingdom Jody M Taft --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South Africa Fanomezana M Ratsoavina --- Université d’Antananarivo, MadagascarThe distribution and population density of the Critically Endangered Tarzan Chameleon (Calumma tarzan) in eastern humid forests of Madagascar was studied using line transect-distance sampling. Based on the results from species distribution models, eight sites were visited over a four-month... -
Driving green procurement in a developing country: The roles of corporate environmental ethics, environmental training, and top management commitment
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Emmanuel Kwabena Anin --- Kumasi Technical University, Ghana Daniel Etse --- Kumasi Technical University, Ghana Gilbert Anyowuo Okyere --- Kwame Nkrumah University of Science and Technology, Ghana Darlington Bright Yao Adanfo --- Ghana Tertiary Education Commission, GhanaGreen procurement expands firms’ possibilities to contribute to environmental sustainability goals in supply chains, although knowledge of its drivers remains underdeveloped in developing countries. This research extends the literature on corporate environmental ethics to green procurement by developing a conceptual... -
Representing the Politics of Memory: Narrative Strategies in Forna’s The Devil that Danced on the Water (2002) and The Memory of Love (2010)
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Maryline Chepngetich Kirui --- Moi University, KenyaThis article examines how Aminatta Forna manipulates point of view to represent the politics of memory in her memoir, The Devil that Danced on the Water (2002), and her novel, The Memory of Love (2010). It proceeds from the view... -
Turnaround for municipal distress resolution: An audit outcomes approach
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Mariska McKenzie --- University of Johannesburg, South Africa Ben Marx --- University of Johannesburg, South AfricaPurpose: This research study aims to identify effective turnaround strategies that can resolve municipal financial distress by improving the audit outcomes of dysfunctional municipalities. -
Transgenerational transmission in psychoanalysis: A phenomenology of dislocating errands
Item type: Journal Article • Journal: Indo-Pacific Journal of Phenomenology • Authors: Maurice Apprey --- University of Virginia, USAIn the process of psychical transmission from one generation to the next, who asks what of whom? The evocative expression of an ‘errand’ suggests that a subject is sent on a mission, sent in error, wanders away, and returns home,... -
Quantile dependencies between exchange rate volatility and sectoral stock returns in South Africa
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Darren Mubaiwa --- University of the Witwatersrand, South Africa Ismail Fasanya --- University of the Witwatersrand, South AfricaThis study assesses the effect of USD-Rand exchange rate volatility on South African sectoral stock returns between 29 March 1996 and 28 July 2022. Using the quantile-on-quantile regression (QQR) technique, we uncover that, although each of the sectors exhibit important... -
Analysis of rural women’s access to financial services and corporate social responsibility in Nigeria’s Niger delta region
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Joseph Ikechukwu Uduji --- University of Nigeria, Nigeria Elda Nduka Okolo-Obasi --- University of Nigeria, NigeriaThe purpose of this paper is to critically examine the corporate social responsibility (CSR) initiatives of multinational oil companies (MOCs) in Nigeria. Its special focus is to investigate the impact of the global memorandum of understanding (GMoU) on enhancing rural... -
Investigating stimulating factors for customer booking intentions on brand websites
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Marit de Vries --- NHL Stenden University of Applied Sciences, The Netherlands Niels Klein Poelhuis --- NHL Stenden University of Applied Sciences, The NetherlandsCustomers have ample opportunities regarding channels to use to book a hotel room: offline and online. In the online world, the options are using the hotel’s website, referred to as the brand website, or third party internet sites like online... -
Influence of optimal room occupancy strategies on revenue maximisation during slack periods in selected 3- to 5-star hotels in Ghana
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: John Adanse --- School of Business, Economics and Tourism Management, Kenyatta University, Kenya Rosemarie Khayiya --- School of Business, Economics and Tourism Management, Kenyatta University, Kenya Vincent Maranga --- School of Business, Economics and Tourism Management, Kenyatta University, KenyaAn organisation’s inability to generate adequate income to sustain its business activities poses a significant challenge to maintaining profitability. Employing revenue-maximisation strategies is crucial to securing necessary resources and ensuring the continued success and stability of organisations. The purpose of... -
Complete convergence for the maximal partial sums without maximal inequalities
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Fakhreddine Boukhari --- Abou Bekr Belkaid University, Algeria Nguyen Chi Dzung --- Institute of Mathematics, Vietnam Academy of Science and Technology, Vietnam Lê Vǎn Thaǹh --- Vinh University, VietnamThis work provides the necessary and sufficient conditions for complete convergence for the maximal partial sums of dependent random variables. The results are proved without using maximal inequalities. The main theorems can be applied to sequences of (i) m-pairwise negatively... -
Lack of evasive behaviour by a Martial Eagle Polemaetus bellicosus on impact with a turbine blade at a South African wind farm: causes and mitigations
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robert E Simmons --- University of Cape Town, South Africa Marlei Martins --- , South AfricaWe describe a collision of Africa’s largest raptor, the Martial Eagle Polemaetus bellicosus with a spinning blade at a South African wind farm in the Eastern Cape in July 2016, and the abandonment of the territory following a second fatal... -
Purposeful rumination on childhood trauma and post-traumatic growth among college students: A moderated mediation model
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Caiping Zhou --- Hunan University of Finance and Economics, China Liu Ning --- Hunan Normal University, China Haibin Li --- Jiangxi University of Chinese Medicine, ChinaThis study explored the role of cognitive reappraisal and perceived social support in the relationship between purposeful rumination and post-traumatic growth among college students who experienced childhood trauma. A total of 811 college students with childhood trauma exposure (female =... -
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... -
The impact of sheep grazing on shrub communities at the Afrikaner and Hereford grazing trials at Grootfontein in the Eastern Upper Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: L Hebbelmann --- , South Africa TG O’Connor --- , South Africa JCO du Toit --- Grootfontein Agricultural Development Institute, South AfricaIn the Nama-Karoo, grazing by livestock is an important driver of Karoo shrub composition. Many different breeds of livestock are farmed in the Nama-Karoo, and the stocking rate varies greatly over the region. In this study we examine how grazing... -
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... -
Going green, going strong: maximising restaurant performance with sustainable practices
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Salman Khan --- Research Institute of Business Analytics and Supply Chain Management, Shenzhen University, China Safeer Ullah Khan --- Research Institute of Business Analytics and Supply Chain Management, Shenzhen University, China Shafaqat Mehmood --- Research Institute of Business Analytics and Supply Chain Management, Shenzhen University, ChinaThe food and services sector contributes to global carbon emissions, impacting climate change. This study, organised in a developing country, aims to explore how restaurants in the hospitality industry can enhance their environmental and financial performance through corporate social responsibility... -
The future of AI: hospitality and tourism perspectives
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Georges El Hajal --- NHL Stenden University of Applied Sciences, The NetherlandsThe Hotel Management School Leeuwarden and the European Tourism Futures Institute organised a webinar to discuss and explore how artificial intelligence (AI) will impact the hospitality and tourism industry in the future. The webinar brought together a panel of academics,... -
Perceptions and knowledge about the use of biological indicators in freshwater ecosystem monitoring in Rwanda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Nzarora --- College of Science and Technology, University of Rwanda, Rwanda C Cocquyt --- , Belgium V Nzibaza --- Center of Excellence in Biodiversity and Natural Resources Management, University of Rwanda, Rwanda V Nsengimana --- College of Science and Technology, University of Rwanda, Rwanda PJ Mugume --- Center of Excellence in Biodiversity and Natural Resources Management, University of Rwanda, Rwanda BA Kaplin --- College of Science and Technology, University of Rwanda, RwandaThe use of biological monitoring (biomonitoring) to assess water quality is recognised alongside the use of chemical and physicochemical parameters due to its ability and efficiency in providing information about both current and long-term changes. Indeed, biomonitoring is applied in... -
Provision of HIV testing services and its impact on the HIV positivity rate in the public health sector in KwaZulu-Natal: a ten-year review
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Rizwana Desai --- Health Services Planning, Monitoring & Evaluation, South Africa Stanley Onwubu --- Durban University of Technology, South Africa Elizabeth Lutge --- University of KwaZulu-Natal, South Africa Nondumiso Patience Buthelezi --- Health Services Planning, Monitoring & Evaluation, South Africa Nirvasha Moodley --- Health Services Planning, Monitoring & Evaluation, South Africa Firoza Haffejee --- Durban University of Technology, South Africa Bontle Segobe --- Health Services Planning, Monitoring & Evaluation, South Africa Suresh Babu Naidu Krishna --- Durban University of Technology, South Africa Maureen Nokuthula Sibiya --- Durban University of Technology, South Africa Champaklal Chhaganlal Jinabhai --- Durban University of Technology, South AfricaSouth Africa has been rated as having the most severe HIV epidemic in the world since it has one of the largest populations of people living with HIV (PLHIV). KwaZulu-Natal (KZN) is the epicentre of the HIV epidemic. The HIV... -
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... -
“Feeling their way through their cultural roots”: theorising the Khoisan revivalist critique of authenticity from below
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Rafael Verbuyst --- University of Gent, BelgiumAuthenticity is a longstanding concern in Khoisan Studies. Most scholarship has examined how stereotypical, essentialist and static notions of “authentic” Khoisan identity and culture are habitually reproduced and demanded of the Khoisan for economic or political gain. Recent work instead... -
Impact of agricultural land-use on functional feeding groups of Afrotropical Ephemeroptera, Plecoptera and Trichoptera in the Kat River, Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Frank Chukwuzuoke Akamagwuna --- Rhodes University, South Africa Oghenekaro Nelson Odume --- Institute for Water Research, Rhodes University, South Africa Nicole Bertine Richoux --- Rhodes University, South AfricaDespite Africa experiencing a substantial rise in inadequately managed agricultural practices, studies examining the effects of these activities on the functional organisation of macroinvertebrates in tropical streams are underdeveloped. The responses of Ephemeroptera, Plecoptera and Trichoptera (EPTs) functional feeding groups... -
The use and protection of water resources in the uThukela River Catchment, South Africa: a review of its past, present and future
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Wade --- University of Mpumalanga, South Africa GC O’Brien --- Gulbali Institute, Charles Sturt University, Australia G Jewitt --- IHE Delft Institute for Water Education, the NetherlandsSouth Africa is a water-stressed country and therefore the quantity and quality of the water resources are very important. The uThukela River is one of South Africa’s largest rivers and is a critical component of water resource utilisation in South... -
A preliminary macroinvertebrate index of biotic integrity (M-IBI) for monitoring the highland flood plain wetland ecosystems in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet Fetene --- Asossa University, Ethiopia Seyoum Mengistou --- Addis Ababa University, Ethiopia Bikila Warkineh Dullo --- Addis Ababa University, EthiopiaAnthropogenic activities have put tremendous pressure on the natural condition of wetlands. However, few studies have used indices based on benthic invertebrates to assess the effect of these pressures on wetland ecosystems. Multi-metric indices (MMIs) have been used successfully to... -
Life-history strategy and intertidal distribution in sympatric species of pulmonate limpets of the genus Siphonaria
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CD McQuaid --- Rhodes University, South Africa RJ Chambers --- Rhodes University, South AfricaThree species of the intertidal pulmonate limpet genus Siphonaria are sympatric on the south coast of South Africa and all lay gelatinous benthic egg masses. Siphonaria capensis and S. concinna hatch as planktonic larvae, whereas S. serrata has direct-developing larvae... -
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... -
Do corporate reputation concerns constrain real earnings management practices? A multidimensional analysis
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Oreshile Sulaiman Ademola --- Lagos State University, NigeriaPurpose: This study integrates Eisenegger and Imhof's (EI) reputation theory and the reputation-building hypothesis to explore how corporate reputation (CREP) concerns constrain real earnings management (REM). -
Determinants of the effective tax rate: Board composition of South African firms listed on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Cecileen Greeff --- School of Accountancy, Stellenbosch University, South AfricaMotivation: Numerous international studies have been conducted to determine the effect of board composition on tax aggressiveness, and ultimately the effective tax rate (ETR) of firms, but to the best of the author's knowledge, no similar research from a South... -
Research on the influence of fiscal policy uncertainty on corporate strategic investment – Evidence from China
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Xuejiao Yu --- Central University of Finance and Economics, China Xiaomin Cao --- Central University of Finance and Economics, China Junjian Gu --- Wuhan University of Technology, ChinaCorporations should pay attention to various policies issued by The Chinese government when making strategic investment. This paper discusses the influence of fiscal policy uncertainty on corporate strategic investment and its mechanism. The results show that the uncertainty of fiscal... -
Exploring the diversity of leafrollers (Lepidoptera: Tortricidae) associated with eucalypts in South African forestry nurseries and plantations, with a new report of Strepsicrates sp.
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Privilege T Makunde --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Bernard Slippers --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South Africa Brett P Hurley --- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, South AfricaA number of insect pests cause damage to eucalypts in South Africa. Their accurate identification is a key part of managing and controlling these pests. The aims of this study were to identify leafroller insect species in South African eucalypt... -
“Esprit de B Corps”: The rapid increase in B Corp accreditations across UK hospitality companies — a viewpoint on their collective potential and a future research agenda
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Mark Ashton --- University of Surrey, UK Viachaslau Filimonau --- University of Surrey, UKThe rapid growth of B-Corp certified organisations in the UK hospitality sector calls for a better understanding of their potential to influence the supply and demand sides of the market. It also requires an outline of a dedicated research agenda... -
From willingness to pay to willingness to believe: the role of storytelling in driving true pricing in hospitality and tourism
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Henri Kuokkanen --- Institut Lyfe, France Jean-Pierre van der Rest --- Leiden University, The NetherlandsResearch indicates that consumers are willing to pay for socially responsible and green attributes. Yet studies on the relationship between environment, society and governance (ESG) and financial performance report mixed findings regarding the impact of sustainability initiatives on risk and... -
The influence of row width, planting density and cultivars on seedling establishment of no-till spring wheat (Triticum aestivum L.) in Western Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P.C. Tolmay --- ARC-Small Grain Institute, South Africa G.A. Agenbag --- Department of Agronomy, University of Stellenbosch, South Africa M.B. Hardy --- Institute for Plant Production, Department of Agriculture: Western Cape, South AfricaLow rainfall during the wheat growing season in Mediterranean climates leads to variation in growth period and this may constrain yield. Low seedling survival is among the factors that can limit yield in the Western Cape. Seedling survival rates of... -
“We are More Than This”: Counterhistories and Female Voices in Maaza Mengiste’s The Shadow King
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Joseph Kwanya --- Rhodes University,In this essay, I examine the potential of the counterfactual framework in retelling obscured or misrepresented stories of women in African wartime narratives. I analyse Maaza Mengiste’s The Shadow King (2019), which uses the Second Italo-Ethiopian War as a foundation... -
Academic researchers’ work stress and work engagement: Hindrance stress appraisal mediation and psychological resilience moderation
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Hui Wang --- Xiangtan University, China Yan Li --- Xiangtan University, ChinaWe explored the role of hindrance stress appraisal and psychological resilience in the relationship between work stress and work engagement among academic researchers. Data were collected from academic researchers in China (n = 314; female = 48.7%; professor = 10.8%,... -
The quality of care in correctional facilities in low- and middle-income countries during the COVID-19 pandemic: A scoping review of literature
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Wandile F. Tsabedze --- University of South Africa, South Africa Eduard Fourie --- University of South Africa, South Africa Samantha Mhlanga --- University of Witwatersrand, South Africa Sifiso Shabangu --- Stellenbosch University, South AfricaCOVID-19 affected different groups of people, including service providers and residents of correctional centres. We reviewed the literature for evidence on the quality of care during COVID-19 in correctional facilities located in low- and middle-income countries. We searched PubMed, PsychInfo,... -
Future work self and career calling in vocational education students: Workplace learning as a mediator and mentoring as a moderator
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bin Liu --- Northeast Normal University, China Chunna Hou --- Northeast Normal University, ChinaWe explored the role of workplace learning and mentoring in the relationship between future work self and career calling among students. The nationwide sample comprised 741 Science and Engineering students from six higher vocational colleges in China (female = 46.56%;... -
Are inorganic nitrogen concentrations in potassium chloride and saturated paste extracts of irrigated soils comparable?
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D Steenekamp --- University of the Free State, South Africa LD van Rensburg --- University of the Free State, South Africa JH Barnard --- University of the Free State, South Africa CC du Preez --- University of the Free State, South AfricaPrecision agriculture is gaining momentum in irrigation through the assessment of soil salinity variability, often facilitated by electromagnetic induction (EMI) sensors. This study aimed to evaluate whether saturated paste extracts (SATe) could serve as a substitute for the standard 2... -
The grazer Cymbula oculus (Patellogastropoda: Patellidae) serves as an important settlement substrate for several of its macroalgal prey
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: W Moosa --- University of the Western Cape, South Africa J Phillips --- University of the Western Cape, South Africa GW Maneveldt --- University of the Western Cape, South AfricaIntertidal communities are predictably affected by both physical and biological factors, with herbivory as a particularly important factor. Instead of dense beds of macroalgae, which typically characterise the mid-eulittoral zone along the south coast of South Africa, at Kalk Bay... -
The effects of financial performance and corporate social responsibility on integrated reporting: The case of listed firms in Nigeria
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Ini Etete Udofia --- University of Lagos, Nigeria Collins Sankay Oboh --- University of Lagos, NigeriaThis study investigates the impact of financial performance (FP) and corporate social responsibility (CSR) on integrated reporting (IR) of listed firms in Nigeria during the 2013–2022 period. Using a set of 630 firm-year observations over ten years, this study establishes... -
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. -
Corporate social responsibility and firm performance: Evidence from Korea
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Wonhee You --- Sungkyunkwan University, Korea Jens Müller-Merbach --- , Germany Doojin Ryu --- Sungkyunkwan University, KoreaThis study explores the relationship between corporate social responsibility (CSR) and corporate financial performance (CFP) in listed Korean companies over ten years. The results show a significant positive effect of CSR on CFP in the manufacturing sector, but no notable... -
Investigating the link between ESG activities and dividend policies
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Doojin Ryu --- Sungkyunkwan University, Korea Doowon Ryu --- Kyung Hee University, Korea Heejin Yang --- Dongguk University WISE Campus, KoreaThis study investigates the relationship between environmental, social, and governance (ESG) activities and dividend policies among non-financial firms. Specifically, it explores how ESG performance influences dividend payout levels, stability, and the likelihood of dividend payments. Using a broad sample of... -
Belowground resprouting potential and nutrient acquisition traits of three perennial grasses during the short dry season in Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Edwin M Kakusu --- University of Nairobi, Kenya RN Kinuthia --- University of Nairobi, Kenya Jacqueline P Ott --- , USA OK Koech --- University of Nairobi, KenyaSurvival of perennial grasses between wet seasons depends on the maintenance of belowground buds and root systems. Belowground bud and root traits were evaluated in three perennial grasses (Pennisetum mezianum (Leeke), Digitaria macroblephara (Hack. ex Schinz) Paoli, and Themeda triandra... -
Reimagining corporate planning practices for operational flexibility and sustainability in emerging economy: A reflection on the Nigerian private sector
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Daniel E. Ufua --- Centre for Economic Policy and Development Research (CEPDeR ), Mamdouh Abdulaziz Saleh Al-Faryan --- The Saudi Economic Association, Saudi Arabia Basit Ali --- ILMA University, PakistanThis study examined corporate planning and operational flexibility in an emerging economy, the Nigerian private sector. The research aimed to develop learning on the practice of corporate planning, with a view from the perspectives of the affected stakeholders who are... -
Urban persistence and species interactions: diverging trends in the abundance of Peregrine Falcons Falco peregrinus and Lanner Falcons F. biarmicus across southern Africa using the Southern African Bird Atlas Project
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kyle T Govender --- School of Life Sciences, University of KwaZulu-Natal, South Africa Mfundo ST Maseko --- School of Life Sciences, University of KwaZulu-Natal, South Africa Alan TK Lee --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaCitizen science has emerged as a powerful tool for engaging the public in ecological data collection, crucial for monitoring species’ distributions and abundance over large geographic scales and extended time periods. This study used data from the Southern African Bird... -
Managing drought stress in wheat (Triticum aestivum L.) production: strategies and impacts
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Maltase Mutanda --- University of South Africa, South Africa Hussein Shimelis --- School of Agricultural, South Africa Vincent Chaplot --- School of Agricultural, South Africa Sandiswa Figlan --- University of South Africa, South AfricaDrought stress is a major constraint to sustainable wheat production worldwide, including sub-Saharan Africa, where environmental and poor agronomic practices exacerbate the yield gap. Drought disrupts physiological, biochemical, and molescular processes, negatively impacting crop growth, grain yield and quality. This... -
Adoption of precision agriculture practices in South African field crop production systems: a national survey
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: KJ Truter --- Stellenbosch University, South Africa H Glas --- Bureau for Food and Agricultural Policy (BFAP), South Africa M Delport --- Stellenbosch University, South Africa FH Meyer --- Bureau for Food and Agricultural Policy (BFAP), South Africa PA Swanepoel --- Stellenbosch University, South AfricaThe implementation of precision agriculture practices can enhance agricultural productivity, sustainability, and on-farm profitability. Nonetheless, adoption rates vary widely across regions and farming operations, particularly in South Africa’s diverse agricultural landscape. This study builds on prior regional analyses by providing... -
A hybrid regularization method for simultaneous inversion of source term and initial value in a time-fractional diffusion equation
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jin Wen --- Northwest Normal University, P.R. China Yong-Ping Wang --- Northwest Normal University, P.R. China Li-Ming Huang --- Northwest Normal University, P.R. China Donal O’Regan --- University of Galway, IrelandThis paper considers an inverse problem to find the space-dependent source term and initial data simultaneously in a time-fractional diffusion equation. This inverse problem is usually ill-posed, that is, small errors in the measurement typically lead to large errors in... -
Does spring defoliation affect energy reserves in a South African mesic grassland geophyte?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Craig D Morris --- c/o School of Life Sciences, University of KwaZulu-Natal, South Africa Sindiso Nkuna --- School of Life Sciences, University of KwaZulu-Natal, South AfricaOvergrazing reduces the abundance of mesic grassland forbs, including geophytes. The potential negative effect of spring grazing, aimed at exploiting high-quality grass forage, on energy reserves in underground storage organs (USOs) of a mesic grassland geophyte, Merwilla plumbea (Lindl.) Speta,... -
Abstract degenerate difference equations
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Marko Kostić --- University of Novi Sad, SerbiaIn this paper, we consider some classes of the abstract degenerate difference equations with integer-order derivatives. We also investigate the existence and uniqueness of almost periodic type solutions to the abstract degenerate difference equations. -
Assessment of seed quality through rapid tests: a bibliometric analysis
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos Luiz da Silva --- Federal Rural University of Pernambuco, Brazil Marcone Moreira Santos --- Federal Rural University of Pernambuco, Brazil Eliane Cristina Sampaio de Freitas --- Federal Rural University of Pernambuco, Brazil Raquel Maria de Oliveira Pires --- Federal University of Lavras, Brazil Moema Barbosa de Sousa --- Federal Rural University of Pernambuco, Brazil Paulo César da Silva Santos --- Federal Rural University of Pernambuco, Brazil Erika Rayra Lima Nonato --- Federal Rural University of Pernambuco, Brazil Gabriel Alves de Lima --- Federal Rural University of Pernambuco, Brazil Ricardo Gallo --- Federal Rural University of Pernambuco, BrazilSeed quality is essential to ensure success in plant production. Traditionally, germination testing is widely used to assess seed viability, but it is a time-consuming process. Consequently, rapid tests have been increasingly explored due to their efficiency and speed. This... -
Building an ethical artificial intelligence corporate governance framework for the integration of emerging technologies into business processes
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Husain Coovadia --- University of Johannesburg, South Africa Ben Marx --- University of Johannesburg, South Africa Ilse Botha --- University of Johannesburg, South Africa Nusirat O. Gold --- University of Johannesburg, -
Location matters: Market reactions to South African corporations’ cross-border transactions
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Werner Mennen --- University of Cape Town, South Africa Ryan Kruger --- University of Cape Town, South Africa Eden Gross --- University of the Witwatersrand, South AfricaWe evaluate the market reaction to 320 cross-border transactions (CBTs) by South African-listed corporations from January 2005 to June 2024. The sample is divided according to the development state of the target company’s country and the currency of the target’s... -
On SVc -Spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Amir Veisi --- Yasouj University, Iran Zahra Keshtkar --- Yasouj University, IranWe say that a topological space X is an SVc-space if Cc (X) is an SV - ring, that is, is a valuation ring for every prime ideal P of Cc (X). The purpose of this paper is to study... -
4. “Make starchy foods part of most meals”: a food-based dietary guideline for South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Vorster HH --- North-West University,A national working group, convened by the Directorate Nutrition in the Department of Health, recently revised the set of South African food-based dietary guidelines (FBDGs). The objective of this technical review paper is to motivate and support the FBDG “Make... -
Digital transformation and goodwill impairment
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Yan Zhao --- Beijing Wuzi University, China Honglin Liu --- Wuhan Textile University, China Libin Zhao --- Wuhan Textile University, China Wei Zhang --- Wuhan Textile University, ChinaWe utilise a sample M&A listed on the Chinese A-shares market between 2008 and 2021. Our focus is specifically on A-share listed companies that acted as acquiring firms. We conduct an empirical analysis to investigate how their digital transformation influences... -
Relevance of corporation quality and environmental protection, social responsibility, and corporate governance
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Meng-Yi Liu --- Feng Chia University, Taiwan (R.O.C.) Ying-Chieh Shen --- Feng Chia University, Taiwan (R.O.C.)This study explores the relationship between corporate ESG performance, various corporate quality metrics, and the F-Score. The empirical results obtained using composite quality indicators based on traditional financial performance metrics exhibit a significant positive correlation with corporate ESG performance and... -
Corporate sustainability in Africa: A review, trends and future direction
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Tshegofatso A. Monkge --- University of Pretoria, South Africa Catherine le Roux --- University of Pretoria, South Africa Rebaona Letsholo --- University of Pretoria, South AfricaAs the world grapples with grand challenges, Africa remains the most affected yet receives the least research focus. This study adopts a systematic scoping review to analyze the extent of corporate sustainability research in Africa. Using a predetermined search strategy... -
Foraging behaviour of scatter-hoarding gerbils (Gerbilliscus (Gerbillurus)) influences seed fate and dispersal for key plant species in the Namib Desert
Item type: Journal Article • Journal: African Zoology • Authors: Saima D Shikesho --- Gobabeb-Namib Research Institute, Namib Naukluft National Park, Namibia Eugene Marais --- Gobabeb-Namib Research Institute, Namib Naukluft National Park, Namibia Jeremy J Midgley --- University of Cape Town, South AfricaHairy-footed gerbils (Gerbilliscus (Gerbillurus) spp.) in the Namib Desert play a dual ecological role as both seed dispersers and predators, a behaviour typical of scatter-hoarding species. The fate of seeds following their removal by these gerbils, whether consumed immediately or... -
Seasonality in the events industry: A case study of two event venues in Amsterdam
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Cathelijne de Jong --- NHL Stenden University of Applied Sciences, The Netherlands Rodney Westerlaken --- NHL Stenden University of Applied Sciences, The NetherlandsThis study aims to expand academic understanding of seasonality by establishing if previous scholarly work on the subject is also applicable to the novel context of the urban event industry. A mixed-method approach combining qualitative and quantitative research was applied,... -
Investigation on the foraging ecology of black crowned cranes at Lake Tana, Ethiopia, in the context of climate change impacts
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SA Zelelew --- Bahir Dar University, Ethiopia C Relton --- , South AfricaThere are significant gaps in understanding the food resources of the black crowned crane in the Lake Tana wetlands. This study examined macroinvertebrates in crane habitats, investigated the impact of rainfall on macroinvertebrates in relation to pollution tolerance, and identified... -
A review of the factors affecting bark quality of black wattle (Acacia mearnsii De Wild.) in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: P Avadianund Bridglall --- University of KwaZulu-Natal, South Africa MD Laing --- University of KwaZulu-Natal, South Africa A Morris --- Institute for Commercial Forestry Research, University of KwaZulu-Natal, South Africa RJ Burgdorf --- Institute for Commercial Forestry Research, University of KwaZulu-Natal, South AfricaBlack wattle (Acacia mearnsii De Wild.) stands as a pivotal commercial tree species, spanning 82 000 ha of land in South Africa. The revenue stream, sourced the from timber (85%) and bark (15%) sales, is estimated at US$200 million annually... -
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... -
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... -
An evaluation of tax compliance among small businesses
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Mphagahlele O. Ndlovu --- University of, South Africa Daniel P. Schutte --- North-West University, South Africa -
Management entrenchment: Determinants and impact on firm performance of French listed companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Mounir Jaouadi --- Arab Open University, Kingdom of Saudi Arabia Amira Feidi --- University of Tunis El-Manar, Tunisia -
Approximation and Compactness
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: E. Colebunders --- Vrije Universiteit Brussel, België R. Lowen --- Universiteit Antwerpen, BelgiëIn approach theory convergence is described by means of limit and adherence operators acting on filters or ultrafilters. The value of the limit resp. adherence operator on an (ultra)filter in a point x is interpreted as the distance that the... -
Size does matter: clinical outcomes of percutaneous endoscopic gastrostomy (PEG) placement in a South African tertiary endoscopy unit
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Dominic M Mutura --- Groote Schuur Hospital, University of Cape Town, South Africa Galya Chinnery --- Groote Schuur Hospital, University of Cape Town, South Africa Tanna Cohen --- Groote Schuur Hospital, South Africa Brittany Gibson --- Red Cross War Memorial Children’s Hospital, University of Cape Town, South Africa Mashiko Setshedi --- Groote Schuur Hospital, University of Cape Town, South Africa Matthias F Scriba --- Groote Schuur Hospital, University of Cape Town, South Africa -
Federated machine learning for cross-bank credit card fraud detection: A privacy-preserving framework
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Dhanveer Singh --- Technology Leader Capital One USA, USA Raja Chattopadhyay --- Technology Leader Capital One USA, USAFederated machine learning is a solution to the problem of identifying instances of credit card fraud in any bank without violating privacy laws. The framework proposed in this paper any bank without violating privacy laws. The framework proposed in this... -
Large bird collision mortality on power lines in southern Namibia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: John Pallett --- University of Cape Town, South Africa Peter G Ryan --- University of Cape Town, South AfricaGlobally, power lines cause significant mortalities of birds through collisions and electrocutions, yet this problem has received only sporadic attention in Namibia. Vehicle-based surveys were undertaken every three months for one year to record mortalities of large birds along 349... -
Benthic macrofaunal changes in response to restoration efforts in the St Lucia estuarine lake, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PC Moloi --- School of Agriculture and Science, University of KwaZulu-Natal, South Africa GM Rishworth --- Department of Zoology, Institute for Coastal and Marine Research, Nelson Mandela University, South Africa MS Bird --- Department of Zoology, University of Johannesburg, South Africa NK Carrasco --- School of Agriculture and Science, University of KwaZulu-Natal, South AfricaThe St Lucia estuarine lake and Mfolozi River mouth on the Indian Ocean coast of South Africa were once a single, connected system but were artificially separated in 1952 to prevent siltation from the Mfolozi River catchment which risked shallowing... -
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 role of green innovation in mediating green supply chain and CSR impacts on hospitality firm performance: Evidence from Ghana
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Mohammed Majeed --- Tamale Technical University, Ghana Esther Asiedu --- Ghana Communication Technology University, Ghana Iddrisu Sulemana --- Tamale College of Education, Ghana Aidatu Abubakari --- Wisconsin International University College, Ghana Ahmed Sakara --- Tamale Technical University, GhanaThis study examines the impact of green supply chain management (GSCM) and corporate social responsibility (CSR) on the performance of hospitality firms in Ghana, using stakeholder theory and considering green innovation (GI) as a mediating factor. A quantitative survey of... -
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... -
Executive pay, committee diversity and financial performance of JSE-listed companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Reon Matemane --- University of Pretoria, South Africa Oloyede Obagbuwa --- Walter Sisulu University, South Africa Kwabena Agyarko Gyekye --- University of Pretoria, South Africa Herman Sello Mphela --- University of Pretoria, South Africa
