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The Role of Genotype-Environment Interaction in Adaptability
Item type: Journal Article • Journal: South African Forestry Journal • Authors: P.J. Robbertse --- D.R. De Wet Forestry Research Centre,The over sites ratio of clonal (familial) genotype-environment interaction (GEI) variance to mean trial variance determines the regression that is used to predict adaptability. Genotypic and environmental variances do not contribute significantly to this regression. Genotype x environment interaction effects... -
Pine Provenance Research in South Africa: Promises and Problems
Item type: Journal Article • Journal: South African Forestry Journal • Authors: E.R. Falkenhagen --- ,Provenance research really started with the work of H.L. Duhamel Du Monceau on Pinus sylvestris in the eighteenth century. In South Africa the first properly designed provenance trials were established between 1934 and 1936 with the testing of five races... -
The Genetic Control of Ring Width, Wood Density and Tracheid Length in the Juvenile Core of Pinus patula
Item type: Journal Article • Journal: South African Forestry Journal • Authors: R.D. Barnes --- Forest Research Centre, Zimbabwe J.S. Birks --- , United Kingdom G. Battle --- Forest Research Centre, Zimbabwe L.J. Mullin --- Forest Research Centre, ZimbabweControlled crosses were made between six Pinus patula Schiede & Deppe plus trees selected in plantations. Six full-sib families and two commercial checks were planted in randomised complete block thrice-replicated progeny tests at two sites in Zimbabwe. At 7,5 years,... -
Ergonomic Research in South African Forestry
Item type: Journal Article • Journal: South African Forestry Journal • Authors: Walter Warkotsch --- Faculty of Forestry, South AfricaAfter a short reflection on the South African forest industry the article discusses various research projects in ergonomics. -
Conservation Developments in South African Forestry
Item type: Journal Article • Journal: South African Forestry Journal • Authors: R. McC. Pott --- ,The historical development of environmental conservational activities within the South African Forestry Industry is followed, and the changing emphasis from the conservation of the remaining indigenous forests (pre-1900) to water conservation, to natural assets and unplanted areas is highlighted. The... -
A gradient analysis of grassed mountain catchments in the natal Drakensberg
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: R.S. Walker --- Department of Environment Affairs,An indirect gradient analysis was carried out on vegetation and environmental data from the Mdedelelo Wilderness Area of Cathedral Peak State Forest in Highland Sourveld. Vegetation ordination axes were correlated with environmental variables deduced to have influenced species‐composition. Altitude proved... -
Some factors effecting the dry matter production of lucerne cultivars
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: A. Smith --- Department of Agriculture and Water Supply, MarieF. Smith --- ,Dry matter yields of lucerne cultivars were affected by different factors. A simple equation is given for predicting total dry matter yield of irrigated lucerne based on mean maximum temperatures in January. -
A survey of grazed and ungrazed grassland in the south‐eastern Transvaal highveld 2. Potential floristic composition and patterns of degradation
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.L. Barnes --- Department of Agricultural Development (Transvaal Region), Republic of South AfricaThe floristic composition of selected veld communities which, by virtue of their location were ungrazed but regularly burned, and which were judged to reflect potential floristic composition, was measured at 112 sites in the southeastern Transvaal highveld. Relevant environmental parameters... -
Factors affecting the activity of atrazine in plants and soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.C. Nel --- Department of Plant Production, C.F. Reinhardt --- Department of Plant Production,Available research findings concerning (he activity of atrazine in the plant and soil are presented in a brief review. The role of the environment is emphasized. This review is supplemented by recent research results of the University of Pretoria concerning... -
The nature of genotype × environment interactions for yield in wheat extension trials in the Winter Rainfall Region
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.F. Marais --- ,The necessity to subdivide the wheat producing soils of the Winter Rainfall Region for extension purposes, was considered. Use was made of correlations, interaction variance components and pattern analysis procedures to reflect on the possible existence of sub-environments with different... -
Genotipe × omgewingsinteraksie by winterkoring in die Oranje-Vrystaat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.S. van Deventer --- Departement Genetika, Republiek van Suid-AfrikaGesamentlike variansieanalises is uitgevoer op opbrengs, hektolitermassa en proteïeninhoud data verkry uit koring-evaluasieproewe wat in die Oranje-Vrystaat gedoen is. Die gebalanseerde datastelle het sewe winterkoringgenotipes, ingesluit wat op elk van 14 lokaliteite oor 'n periode van drie jaar geplant was... -
Genotipe—omgewingsinteraksie by sojabone
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. E.M. Odendaal --- , Republiek van Suid-Afrika C.S. van Deventer --- Departement Genetika, Republiek van Suid-Afrika'n Gekombineerde variansie-ontleding is uitgevoer op die saadopbrengste en proteïenpersentasies van die saad van 14 sojaboonkultivars wat op nege verskillende lokaliteite oor 3 jaar geëvalueer is. Variansiekomponente geassosieer met elke bron van variasie is beraam. Die verkreë resultate en implikasies... -
Comparison of cotton (Gossypium hirsutum L.) yield and fibre properties over locations and seasons
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.G. van Heerden --- , Republic of South Africa W.H. van Staden --- , Republic of South Africa G. Vink --- , Republic of South Africa H. van Ark --- , Republic of South AfricaThe cotton breeding program in the Republic of South Africa is conducted at the localities Loskop, Upington and Vaalharts. Preliminary results from breeding trials indicated that a finer but more mature fibre could be produced at Vaalharts as compared to... -
Recommended modifications to the spectrophotometric determination of molybdenum as Fe[MoO(SCN)5]
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F. Bessinger --- , Republic of South AfricaThe classical method for the determination of molybdenum in plant material by the formation of an iron-molybdenum- thiocyanate complex, which is extracted with alcohols, ethers and carbon tetrachloride from a dilute acid solution, is basically very suitable for the detection... -
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... -
Concentration, accumulation and uptake rate of Cu, Fe, Mn and Zn by wheat under irrigation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.C. du Preez --- Department of Soil Science, Republic of South Africa A. T.P. Bennie --- Department of Soil Science, Republic of South AfricaThe objective of this study was to obtain information on the Cu, Fe, Mn and Zn uptake patterns of wheat (Triticum aestivum L.) grown under normal irrigation farming conditions. Except for irrigation scheduling, the 13 farmers on whose farms the... -
A slope sequence of Podzols in the southern Cape, South Africa 1. Physical and micromorphological properties
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.C. Hawker --- Department of Geography, South Africa T.H. van Rooyen --- Department of Geography, South Africa R.W. Fitzpatrick --- Department of Geography, South AfricaIn South Africa the characteristics of Podzols, with or without placic horizons, and the complex processes involved in their formation, are generally still poorly understood. To investigate both these aspects thoroughly, these soils were studied in the landscape context, described... -
The success of the AMMI model in predicting lucerne yields for cultivars with differing dormancy characteristics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MarieF. Smith --- , Republic of South Africa A. Smith --- , Republic of South AfricaThe AMMI model, which incorporates both additive and multiplicative components into an integrated, powerful, least squares analysis, is used for the analysis of cultivar trials at different localities. These trials are a major experimental component in crop production and plant... -
AMMI analysis of potato cultivar yield trials
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Steyn --- , Republic of South Africa A.F. Visser --- , Republic of South Africa MarieF. Smith --- , Republic of South Africa J.L. Schoeman --- , Republic of South AfricaPotatoes, Solanum tuberosum (L), are cultivated in South Africa under a variety of different climates and seasons. The wide environmental variation encountered and the confirmed occurrence of genotype-environmental interaction necessitates the use of criteria, other than averages, in the evaluation... -
Multivariate assessment of environmental effects on hard red winter wheat. I. Principal-components analysis of yield and bread-making characteristics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D. van Lili --- Small Grain Centre, Republic of South Africa J.L. Purchase --- Small Grain Centre, Republic of South Africa MarieF. Smith --- , Republic of South Africa G.A. Agenbag --- Department of Agronomy and Pastures, Republic of South Africa O.T. de Villiers --- Department of Agronomy and Pastures, Republic of South AfricaThe attributes of yield and bread-making quality of winter wheats produced in the Free State are subject to environmental effects. The result is a supply to the baking industry of flour of inconsistent quality, which in turn is detrimental to... -
Multivariate assessment of environmental effects on hard red winter wheat. II. Canonical correlation and canonical variate analysis of yield, biochemical and bread-making characteristics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D. van Lili --- Small Grain Centre, Republic of South Africa J.L. Purchase --- Small Grain Centre, Republic of South Africa MarieF. Smith --- , Republic of South Africa G.A. Agenbag --- Department of Agronomy and Pastures, Republic of South Africa O.T. De Villiers --- Department of Botany, Republic of South AfricaThe inconsistent production of winter wheat with acceptable bread-making quality in the Free State reduces the commercial value of the wheat crop. In the second part of this study, canonical correlation analysis was used to determine to what extent variation... -
Plant resistance × environment interaction: Perspectives on yield losses caused by the maize stalk borer, Busseola fusca (Fuller)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. B.J. van Rensburg --- , Republic of South AfricaExperimental maize hybrids with various levels of resistance to the maize stalk borer, Busseola fusca (Fuller), were evaluated at different infestation levels during seasons of favourable and unfavourable rainfall. Limited plant resistance sufficed to reduce plant damage and yield losses... -
Determination of the preharvest sprouting resistance of South African winter wheat (Triticum aestivum L.) cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Annelie Barnard --- , Republic of South Africa J.L. Purchase --- , Republic of South Africa MarieF. Smith --- , Republic of South Africa D. van Lill --- Department of Food, Clothing and Hotel Management, Technicon Free State, Republic of South AfricaPreharvest sprouting significantly reduces the quality of the South African wheat crop. This study classified the preharvest sprouting resistance of 17 South African winter wheat cultivars sampled over a range of typical winter wheat growth environments. Sampling was performed under... -
The relationship between subsoil colour and degree of wetness in a suite of soils in the Grabouw district, Western Cape I. Characterization of colour-defined horizons
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.W. van Huyssteen --- , South Africa F. Ellis --- , South AfricaSoil colour is an easily identifiable property that is invariably used as a parameter in all soil classification systems including the system used in South Africa. To test the hypothesis that soil colour is a reflection of the soil water... -
A quality assurance strategy for wheat (Triticum aestivum L.) where growth environment predominates
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D. van Lill --- Faculty of Applied Sciences, Technikon Free State, South Africa MarieF. Smith --- Department of Statistics, South AfricaThe variation in the processing quality of South African winter wheat cultivars over growth environments is detrimental to its market value. Variation in protein content has previously been identified as a primary contributor to this variation and should therefore be... -
Sources of variation for yield, protein content and hectolitre mass of spring wheat (Triticum aestivum L.) cultivars of the Western and Southern Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Nel --- Department of Agronomy and Pastures, Republic of South Africa G.A. Agenbag --- Department of Agronomy and Pastures, Republic of South Africa J.L. Purchase --- , Republic of South AfricaIn the Western and Southern Cape the quality of wheat varies annually due to variable climatic conditions. This holds a commercial risk to the milling and baking industries in delivering the refined products to their respective clients. It is, therefore,... -
Sources of variation in spring wheat (Triticum aestivum L.) cultivars of the Western and Southern Cape. I. Milling and dough development characteristics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Nel --- Department of Agronomy and Pastures, Republic of South Africa G.A. Agenbag --- Department of Agronomy and Pastures, Republic of South Africa J.L. Purchase --- , Republic of South AfricaApproximately 90% of the annual wheat crop produced in the Republic of South Africa is milled into flour for bread-baking purposes. The percentage of flour extracted, as well as the dough development properties, determine the milling and dough mixing characteristics... -
Sources of variation in spring wheat (Triticum aestivum L.) cultivars of the Western and Southern Cape. II. Baking characteristics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Nel --- Department of Agronomy and Pastures, Republic of South Africa G.A. Agenbag --- Department of Agronomy and Pastures, Republic of South Africa J.L. Purchase --- , Republic of South AfricaProtein content and quality determine flour quality, as well as the success of bread-baking. The stability of wheat quality characteristics is of great importance to the milling and baking industry, who have to produce an end product of acceptable and... -
Genotype × environment interaction of winter wheat (Triticum aestivum L.) in South Africa: I. AMMI analysis of yield performance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.L. Purchase --- , Republic of South Africa Hesta Hatting --- , Republic of South Africa C.S. van Deventer --- Department of Plant Breeding, Republic of South AfricaThirteen winter and intermediate type bread wheat cultivars were evaluated under dryland conditions over a four year period from 1991 to 1994 and over 120 environments in the Free State province of South Africa. The Additive Main Effects and Multiplicative... -
Genotype × environment interaction of winter wheat (Triticum aestivum L.) in South Africa: II. Stability analysis of yield performance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.L. Purchase --- , Republic of South Africa Hesta Hatting --- , Republic of South Africa C.S. van Deventer --- Department of Plant Breeding, Republic of South AfricaThirteen winter and intermediate type bread wheat cultivars were evaluated for yield stability under dryland conditions over a four year period from 1991 to 1994 and over a total of 120 environments in the Western, Central and Eastern Free State... -
An explanation of genotype by environment interaction for maize in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Laubscher --- , Republic of South Africa C.Z. Roux --- Department of Genetics, Republic of South Africa J. M.P. Geerthsen --- Department of Genetics, Republic of South AfricaThe causes of genotype interaction with the environment was investigated using AMMI (Additive Main Effects and Multiplicative Interaction) analysis. AMMI quantified environments by means of E_IPCA1 (first principal component analysis for environment) such that it was highly significantly correlated (r... -
Soils and the environment: the past 25 years
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.L. Schoeman --- , Republic of South Africa P.W. van Deventer --- , Republic of South AfricaLocal work on selected environmental impacts on soil quality and the role of soils in the attenuation of environmental pollution is reviewed. Examples of negative impacts from mining, industries, urbanization, agriculture and forestry abound. The safe and sustainable use of... -
Indications of ferrolysis and structure degradation in an Estcourt soil and possible relationships with plinthite formation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. A.L. le Roux --- Department Soil, Crop and Climate Sciences, Republic of South Africa C.C. du Preez --- Department Soil, Crop and Climate Sciences, Republic of South Africa C. Bühmann --- , Republic of South AfricaGeographic associations of duplex soils, like the Estcourt form, and plinthic soils, like the Avalon and Westleigh forms, such as are found in the Eastern Free State, are recognised worldwide. These soils share redox morphology. In duplex soils, the redox... -
Stability analysis of grain yield of tef (Eragrostis tef) using the mixed model approach
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.D. Kassa --- Discipline of Statistics & Operations Research, Republic of South Africa MarieF. Smith --- Biometry Unit, Republic of South Africa H. Fufa --- , EthiopiaMulti-environment trials are usually used to assess the grain yield stability of genotypes. Most of the common stability measures such as Finlay and Wilkinson (1963), Eberhart and Russell (1966) and Shukla (1972), can be accommodated by a linear mixed model... -
Micromorphological evidence of redox activity in the soft plinthic B horizon of a soil of the Bainsvlei form in an arid bioclimate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.A.L. le Roux --- Department of Soil, Crop and Climate Sciences, Republic of South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, Republic of South AfricaIn South Africa, the pedogenic relevance of soft plinthic B horizons in the border zone between arid and semi-arid bioclimates is often questioned because the prevailing climate is not conducive for fluctuating water tables as required for their formation. These... -
Additive mean effects and multiplicative interaction analysis of maize yield trials in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S. H. Ma’ali --- , South AfricaThirty five maize hybrids were evaluated over 98 environments for genotype x environment interaction (GEI) and yield stability under dry land conditions during the 2003 to 2006 seasons in the eastern and western maize production regions of South Africa. The... -
Redox conditions related to interflow in a soil of the Kroonstad form in the Weatherley catchment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Jennings --- , South Africa P.A.L. Le Roux --- , South Africa C.W. Van Huyssteen --- , South Africa M. Hensley --- , South Africa T.B. Zere --- , South AfricaThe Kroonstad soil form, in the Weatherley catchment, Eastern Cape Province consists of an orthic A / E / G horizon sequence, and is a typical gleyed soil of South Africa. The profile has an uncommon diffuse E / G... -
Spatial distribution of selected chemical properties of soils situated close to an abandoned manganese mine
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G. E. Ekosse --- , South Africa P.S. Fouche --- , South AfricaThis study aimed at understanding the spatial distribution of the base saturation percentage (PSB), cation exchange capacity (CEC), pH(water) and electrical conductivity (EC) in soils situated close to the abandoned Kgwakgwe Mn oxide ore mine, Botswana. Four hundred soil samples... -
Targeting of early to intermediate maize hybrids for yield performanceand yield stability using SREG model
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.S. Setimela --- , Zimbabwe J. Crossa --- CIMMYT Km, D.F Mexico M. Bänziger --- CIMMYT Km, D.F MexicoThe effectiveness of targeting and predicting maize (Zea mays.L) hybrid performance is difficult when the magnitude of genotype x environment (GE) interaction and yield prediction cannot be interpreted and is only based on genotypes (G) and GE means. The traditional... -
Sugarcane cultivar x time of harvest interactions in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S. Ramburan --- , South AfricaThe adaptability of new sugarcane (Saccharum spp.) cultivars to time of harvest (TOH), and reasons for yield variability between harvest times are currently unclear in South Africa. The objectives of this study were to evaluate the adaptability of commercial cultivars... -
The effect of degree and duration of water saturation on selected redox indicators: pe, Fe2+ and Mn2+
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Smith --- Department of Soil, Crop and Climate Sciences, South Africa C.W. van Huyssteen --- Department of Soil, Crop and Climate Sciences, South AfricaIt was previously hypothesised that reduction in the soil will set in at 70% water saturation (S0.7). This study aimed to determine the effect of different degrees and durations of water saturation on reduction in soil. Reduction was measured as... -
Optimum replications and crop-years for sugarcane genotype trials at Dwangwa Sugar Estate in Malawi
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MM Zhou --- , South Africa A Chihana --- , Malawi RC Parfitt --- , South AfricaThe ability to detect significant differences among genotypes in trials depends on the variance associated with the means. Dwangwa Sugar Estate, Malawi, imports genotypes from the South African Sugarcane Research Institute (SASRI) to test for possible commercial release. The objective... -
Selected soil properties as indicators of soil water regime in the Cathedral Peak VI catchment of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: BT Kuenene --- Department of Soil, Crop and Climate Sciences, South Africa CW van Huyssteen --- Department of Soil, Crop and Climate Sciences, South Africa PAL Le Roux --- Department of Soil, Crop and Climate Sciences, South AfricaThe morphological features and physicochemical properties of 14 soil profiles, representing the major soil types, were studied in the Cathedral Peak VI catchment of KwaZulu-Natal, South Africa. The soils are characterised by a high organic carbon content in the topsoil,... -
Relating the onset of reduction to degree of soil water saturation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Kimberly Smith --- Department of Soil, Crop and Climate Sciences, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Sciences, South AfricaLiterature does not indicate the degree of water saturation at which reduction is expected to occur. This study therefore aimed to determine the degree of water saturation (S) at which reduction is initiated. Soil cores were packed to a bulk... -
Web-based teaching, learning and research using accessible real-time data obtained from field-based agrometeorological measurement systems
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael J Savage --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South Africa Michael G Abraha --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South Africa Nicholas C Moyo --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South Africa Nile Babikir --- Agrometeorology Discipline, Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South AfricaTo enhance teaching and learning in agrometeorology and allied disciplines, a Web-based data and information system was developed. The system uses field-based agrometeorologcial measurements, from automatic weather, radiation and temperature stations, to collect and display near real-time and previous data... -
Changes in abundance of the northern Benguela sardine stock during the decade 1990–2000, with comments on the relative importance of fishing and the environment
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: D. C. Boyer H. J. Boyer I. Fossen A. KreinerThe northern Benguela stock of sardine Sardinops sagax used to be considered one of the major clupeoid stocks of the world; it supported an average annual catch of >700 000 tons throughout the 1960s. The stock has been in a... -
The structure of demersal assemblages off Namibia in relation to abiotic factors
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: H. Hamukuaya G. Bianchi D. BairdGroundfish surveys carried out between October 1992 and October 1996 were used to describe the demersal assemblages of the northern Benguela along the Namibian coast. Multivariate analyses indicated a clear separation between shelf and slope habitats, which were divided into... -
The ethics of complexity and the complexity of ethics
Item type: Journal Article • Journal: South African Journal of Philosophy • Authors: Minka Woermann --- Department of Philosophy, Stellenbosch;South Africa Paul Cilliers --- Department of Philosophy, Stellenbosch;South AfricaIn this paper, we investigate the implications that a general view of complexity - i.e. the view that complex phenomena are irreducible - hold for our understanding of ethics. In this view, ethics should be conceived of as constitutive of... -
THE SUMMER CONDITION OF THREE EASTERN TRANSVAAL RESERVOIRS AND SOME CONSIDERATIONS REGARDING THE ASSESSMENT OF TROPHIC STATUS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: R.D. Walmsley --- , South Africa D.F. Toerien --- , South AfricaSummer temperature, oxygen and light penetration profiles in the Da Gama, Klipkopje and Witklip Reservoirs are presented. Analysis of waters from different depths showed the presence of chemical stratification despite the absence of clear thermal stratification. An algal bioassay procedure... -
DISTINGUISHING SUB-ENVIRONMENTS OF SEDIMENT DEPOSITION IN RESERVOIRS USING PARTICLE SIZE DISTRIBUTION PARAMETERS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: A van B Weaver --- Department of Water Affairs, South Africa AW Stone --- Department of Water Affairs, South AfricaThe deposition of sediment and the distribution of sediment sizes in impoundments is related to the hydraulic mechanisms of the lacustrine or reservoir environment. Granulometric parameters of sediments can be particularly sensitive indicators of the hydraulic environments occuring in different... -
THE PLASMA PROTEINS OF SOME FRESHWATER FISH IN THEIR NATURAL ENVIRONMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J. H.J. van Vuren --- Division of Nature Conservation, South AfricaThe plasma proteins of Cyprinus carpio (carp), Barbus holubi (yellowfish), Labeo umbratus (mudfish) and Labeo capensis (mudfish) were electrophoretically separated on polyacrylamide gels from blood samples obtained from specimens sampled during summer and winter in three different localities. Within a... -
ZOOPLANKTON AND ENVIRONMENTAL CONDITIONS IN A SOUTHERN CAPE COASTAL LAKE SYSTEM
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.J. Coetzee --- Cape Department of Nature and Environmental Conservation, South AfricaThe usually natural closing and artificial opening of the Tow River mouth to the sea have a major influence on the physico-chemical environmental conditions in the coastal lake system formed by the Tow River, Eilandvlei, Langvlei and Rondevlei, as it... -
THE DEVELOPMENT OF ECOLOGICAL CONCEPTS IN LIMNOLOGY, WITH PARTICULAR REFERENCE TO THE LAST TWENTY-FIVE YEARS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: C.S. Reynolds --- , UKThis paper compares the development of ecological ideas in limnological science with those refined in terrestrial biology. It is suggested that topics peculiar to the perception and management of aquatic systems had a distracting influence upon the conceptual development of... -
ENVIRONMENTAL CORRELATES OF PLANT SPECIES DISTRIBUTION ON THE NYL RIVER FLOODPLAIN
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: M. A.S. Coetzee --- Botany Department, South Africa K.H. Rogers --- Botany Department, South AfricaThe envisaged construction of a dam on a major tributary of the Nyl River will alter the hydrological regime with consequent effects on the structure and functioning of the downstream floodplain ecosystem (Nylsvley). Attempts to minimise this impact will be... -
THE 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... -
DETRIMENTAL EFFECTS OF FENTHION (QUELETOX® UL), USED TO CONTROL RED-BILLED QUELEA (QUELEA QUELEA), ON RHEOPHILIC BENTHIC MACROINVERTEBRATES IN THE ORANGE RIVER
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R.W. Palmer --- Department of Water Affairs and Forestry, South AfricaThe relative abundance of rheophilic macroinvertebrates in the Orange River was assessed before and 15 hrs after two aerial applications of fenthion (QUELETOX® UL) above roosting sites of the red-billed quelea (Quelea quelea). The first treatment had no detectable effect... -
THE STATE OF KNOWLEDGE OF WATER QUALITY AND MAJOR BIOTIC COMPONENTS OF THE MHLATHUZE ESTUARY
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: D. P. Cyrus --- , , South AfricaThis note briefly introduces the concept of the Environmental Reserve of the New Water Act as well as the set of papers hereafter which deal with specific components of the ecology of the Mhlathuze Estuary. These were prepared for an... -
The effects of topo-edaphic variables and cultivation on the woody vegetation of Weenen Nature Reserve, KwaZulu-Natal
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: L Breebaart TG O'Connor JC Hughes CD Morris IA RushworthThe soil types and woody vegetation of Weenen Nature Reserve (WNR), KwaZulu-Natal, were described. Mispah, overlying shale, and Shortlands, overlying dolerite were the most common of 18 the soil forms encountered. Six vegetation types were identified by TWINS PAN which... -
Monitoring to detect change on rangelands: physical, social and economic/policy drivers
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.R. Brown K.M. HavstadAgents that can cause important changes in properties of biological communities are referred to as drivers. Drivers may be classed as physical, social and economic/policy, referring to their origin and mode of action. Physical drivers include environmental (weather, climate) and... -
The challenge of integrated rangeland monitoring: synthesis address
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: David WesternThe need to balance biodiversity conservation with sustainable development, though widely agreed upon, is elusive in practice. Human societies are increasingly disconnected from the ecosystems which support them. The loosening connection and growing scientific acceptance that ecosystems are complex, dynamic,... -
Classification of the grass layer of semi‐arid rangeland in the Smaldeel area of the eastern Cape
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.C. Martens --- Dept of Agriculture, Republic of South Africa C.D. Morris --- Agricultural Research Council, Republic of South AfricaHierarchical classification based on proportional species composition of the grass layer was used to identify and classify semi‐arid rangeland into range types. The relation between range types produced by the classification and the environmental parameters measured were investigated using a... -
The effect of land-use on the vegetation communities along a topo-moisture gradient in the mid-Fish River valley, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: N.V. Birch A.M. Avis A.R. PalmerThe objectives of this study were to identify the major physical environmental variables affecting plant community distribution, and to determine whether a shift occurred in plant community position along an environmental gradient of different land-use practises. To achieve these objectives... -
Vegetation change over 40 years in the Weenen/Muden area, KwaZulu-Natal: evidence from photo-panoramas
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M.T. Hottman T.G. O'ConnorThe utility of panoramic photographs for studying the extent and pattern of vegetation change, in particular of bush encroachment, was investigated by revisiting thirteen sites in the Weenen and Muden areas of KwaZulu-Natal that had been photographed in 1955. The... -
Remote sensing from space—present and future applications in forestry, nature conservation and landscape management
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Christoph Kätsch --- Faculty of Forestry, Fachhochschule Hildesheim/Holzminden, Germany Holger Vogt --- Dipl. Forstwirt Holger Vogt, Faculty of Forestry, South AfricaPast studies have suggested that sound knowledge about the reflectance characteristics of objects could be of great value in understanding the physical, chemical, and the spatial properties of features on our planet. These characteristics can be assessed remotely, and the... -
An investigation into the occurrence and nature of genotype by environment interaction in Pinus patula
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: C.L. Snedden --- , South Africa S.D. Verryn --- , South AfricaThis study was conducted as part of a joint venture between the tree improvement teams of Safcol and the CSIR to develop a breeding, production and conservation strategy for Pinus patula. -
Targeted spot vegetation management in Pinus radiata and P. elliottii plantations, Tsitsikamma, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S.F. Gous --- , New ZealandTowards the end of 1995, granular herbicides were introduced in South African forestry. Traditionally, weed control was done by manual slashing or herbicides were applied by knapsack sprayer. Targeted, spot herbicide application is more environmentally friendly, less expensive and easier... -
The Impact of Changes in the Work Environment on the Place-Identity of Academics: An Exploratory Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Puleng Segalo --- University of South Africa,The study examined the impact of changes in the work environment on the construction of place-identity among university academics. Data were collected from five academics at a large distance learning university in South Africa. The institution was undergoing major structural... -
Career-story Interviewing Using the Three Anecdotes Technique
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jacobus G. Maree --- University of Pretoria,This article describes the value of using the Three Anecdotes Technique (TAT) during career-story interviewing. The TAT is a technique aimed at eliciting clients' three earliest memories to help counsellors identify clients' preoccupations and thereby support them to deal with... -
Emotional Intelligence and Wellness Among Employees Working in the Nursing Environment
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jan Alewyn Nel --- North-West University, South Africa Cara S. Jonker --- North-West University, South Africa Tinda Rabie --- North-West University, South AfricaThis study's sought to establish the relationship of emotional intelligence, job characteristics and wellness within the nursing environment. A cross-sectional survey design was used. A random probability sample (N=511; females =96.70%; white =77.10%) was taken from hospitals in three South... -
Student Nurses' Experiences of The Clinical Psychiatric Learning Environment in an Education Institution
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Miriam Moagi --- University of Pretoria, Elsie Janse van Rensburg --- University of Pretoria, Jeanette Maritz --- University of South Africa,This study investigated lived experiences of student nurses working in a clinical psychiatric learning environment in South Africa. Participants were 29 fourth-year student nurses in the clinical psychiatric learning environment at a nursing education institution (females = 27; males =2)... -
The Prevalence of Well-Being on Teachers in Afri Twin Schools as Well as Non Afri Twin Schools
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Werner de Klerk --- North-West University, South Africa Q. Michael Temane --- North-West University, South Africa Alida W. Nienaber --- North-West University, South AfricaThis study explored the prevalence of well-being in Afri Twin and non Afri Twin teachers. The Afri Twin project allows schools of comparable type and size in Britain and South Africa to be ‘twinned’ with each other, with a possible... -
Water policy in southern Africa: A brief synopsis of some of the macro driving forces
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AR TurtonThe water sector reforms that are underway in many parts of southern Africa are a manifestation of a global phenomenon. This is rooted in the human response to the undesirable consequences of development, and seeks to introduce the notion of... -
Water — The common element: Lessons from antiquity and the health of the environment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C DickensThe chief pursuit of all aquatic science is to come to know the rules that govern aquatic systems. In this pursuit many scientists move in the direction of greater diversity, where the laws that govern ecosystem relationships become increasingly confined... -
The application of a hydraulic biotope matrix to the assessment of available habitat: Potential application to IFRs and river health monitoring
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RA Wadeson KM RowntreeIn an attempt to meet the requirement of the new South African Water law a number of initiatives are under way to determine the flow requirements for our rivers. An essential component of this initiative is the determination of the... -
The state of knowledge of water quality and major biotic components of the Richards Bay coastal lakes
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DP CyrusThis note briefly introduces the concept of the Environmental Reserve of the new Water Act as well as the set of papers that follow that deal with specific components of the four coastal lakes at the lower end of the... -
Community composition and distribution of macroinvertebrates in the Umzimvubu River, South Africa: a pre-impoundment study
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BR Madikizela AH DyeThis paper presents baseline biological data on aquatic macroinvertebrates and water quality in the Umzimvubu River and selected tributaries, Eastern Cape Province, South Africa, prior to the construction of proposed large-scale water resource developments. Sampling was conducted seasonally at 14... -
Fish assemblages in relation to environmental gradients along a small west African coastal basin, the San Pedro River, Ivory Coast
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Koné GG Teugels V N'Douba EP Kouamélan G Gooré BiPatterns of fish population composition were examined in the San Pedro River, Ivory Coast, in 2001 to assess whether distinct types of assemblage exist along longitudinal gradients within this small coastal basin. A total of 45 species was found: 28... -
Fish communities along environmental gradients within the Comoé River basin, Côte d'Ivoire
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: StanislasS Yao EssetchiP Kouamélan Tidiani Koné Valentin N'Douba Gooré Bi Frans Ollevier DirkF E Thys van den AudenaerdeEighty-four sites in the Comoé basin (Côte d'Ivoire, West Africa) were sampled to identify fish assemblages and their relationships with some environmental variables. Seventy-six freshwater fish species were collected from 22 families and 44 genera: 11 marine and/or brackish water... -
The effect of some environmental factors on zooplankton community biodiversity in Lake Qarun, Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Adel AliA MageedThe zooplankton of Lake Qarun was studied January–December 2003. A total of 26 species was recorded, amongst which protozoa, primarily ciliophora, were most abundant (79% of the species total), followed by rotifera (13%) and copepoda (8%). The average density ranged... -
Fish breeding in, and juvenile recruitment to, the St Lucia Estuarine System under conditions of extended mouth closure and low lake levels
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Digby Cyrus Leon VivierOngoing drought conditions along the northern coast of KwaZulu-Natal resulted in the St Lucia Estuary mouth closing, and to evaporation leading to extremely low lake levels and the development of hypersaline conditions in most parts of the system. The mouth... -
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... -
Copper, zinc and iron concentrations in water, sediment and Cynothrissa mento (Regan 1917) from Ologe Lagoon, Lagos, Nigeria: a preliminary survey
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CA Kumolu-Johnson --- Department of Fisheries, Faculty of Science, Nigeria PE Ndimele --- Department of Fisheries, Faculty of Science, Nigeria SL Akintola --- Department of Fisheries, Faculty of Science, Nigeria CC Jibuike --- Department of Microbiology and Botany, Faculty of Science, NigeriaThe levels of Cu, Fe and Zn in water, sediment and Cynothrissa mento, a commercially important fish species, were investigated from April 2007 to March 2008 at three sites in Ologe Lagoon. Metal levels in the water column and C... -
Ecological status and role of the Mfolozi–Msunduzi estuarine system within the iSimangaliso Wetland Park, a World Heritage Site on the south-east coast of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South Africa L Vivier --- Coastal Research Unit of Zululand, Department of Zoology, South Africa RK Owen --- Coastal Research Unit of Zululand, Department of Zoology, South Africa HL Jerling --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaThe original structure and functioning of the historical Mfolozi–St Lucia estuarine system are described and anthropogenic impacts, which resulted in the Mfolozi and Msunduzi rivers being separated from the St Lucia Estuary and having their own combined mouth to the... -
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... -
Alexandrium catenella and Alexandrium tamarense in the North Lake of Tunis: bloom characteristics and the occurrence of paralytic shellfish toxin
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Z Armi --- , Tunisie A Milandri --- , Italie S Turki --- , Tunisie B Hajjem --- , TunisieThe dinoflagellate Alexandrium is thought to be the main species responsible for paralytic shellfish poisoning (PSP) throughout the world. The genus Alexandrium is present in unusually high diversity in the North Lake of Tunis, a productive Mediterranean fishing and shellfish... -
An overview of the structure and function of microbial biofilms, with special emphasis on heterotrophic aquatic microbial communities
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AW Muia --- Department of Biological Sciences, Kenya G Bretschko --- , Austria GJ Herndl --- Department of Biological Oceanography, The NetherlandsAn overview is presented of the formation, structure and development of biofilms, and of the roles and functions of heterotrophic microbial communities in streambeds, in order to stimulate interest and research in this field in Africa. Microbial biolfilms are of... -
Water quality assessment and application of the biological diatom index in the Kebir-East wadi, Algeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Chaïb --- Laboratoire de Recherche et de Conservation des Zones Humides, Algeria J Tison-Rosebery --- Cemagref Bordeaux, FranceA total of 118 benthic diatom taxa were recorded during a survey in 2007 of the Kebir-East wadi, north-eastern Algeria. Fourteen samples were collected at seven sampling stations in winter and summer. The majority of diatom taxa comprised cosmopolitan species... -
Seasonal distribution of phytoplankton in the Aby lagoon system, Ivory Coast, West Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NM Seu-Anoï --- Laboratoire d’Environnement et de Biologie Aquatique, Côte d'lvoire A Ouattara --- Laboratoire d’Environnement et de Biologie Aquatique, Côte d'lvoire YJ-M Koné --- Laboratoire d’Environnement et de Biologie Aquatique, Côte d'lvoire G Gourène --- Laboratoire d’Environnement et de Biologie Aquatique, Côte d'lvoireSeasonal variability of phytoplankton species composition, abundance and physical and chemical factors influencing phytoplankton dynamics were investigated in the Aby lagoon system, south-eastern Ivory Coast, covering the main climatic seasons in 2006–2007. Seasonal and spatial variability of nutrient concentrations in... -
South African ecotoxicology — present status and future prognosis
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: V Wepener --- Water Research Group, School of Environmental Sciences and Development, South Africa PM Chapman --- , CanadaToxicology studies the interactions of a chemical substance with individual organisms, whereas ecotoxicology is a multidisciplinary approach incorporating ecology and other disciplines, e.g. chemistry, microbiology, etc., to determine responses of individuals, populations and whole ecosystems to stressors such as chemicals... -
Bioassessment in ephemeral rivers: constraints and challenges in applying macroinvertebrate sampling protocols
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Watson --- Centre for Environmental Management, South Africa HF Dallas --- , South AfricaHydrology is a major factor controlling the structure and function of river ecosystems. In contrast to perennial rivers, temporary rivers have periods where surface flow ceases resulting in a highly variable flow regime. Existing bioassessment methods in South Africa are... -
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... -
Characterisation of potential aquaculture pond effluents, and physico-chemical and microbial assessment of effluent-receiving waters in central Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: YB Ansah --- Department of Fish and Wildlife Conservation, USA EA Frimpong --- Department of Fish and Wildlife Conservation, USA S Amisah --- Department of Fisheries and Watershed Management, GhanaAn understanding of specific aquaculture systems and the impacts of their management practices leads to sound and cost-effective policies to protect the aquatic environment. Water samples were collected in 2009 from fish ponds, streams that receive effluents directly from ponds... -
Functionality evaluation of the Xikundu fishway, Luvuvhu River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PSO Fouché --- Zoology Department, South Africa RG Heath --- Golder Associates Africa, South AfricaThe Xikundu fishway, in the Luvuvhu River near Thohoyandou, was monitored for 23 months in 2004–2006. Adults and juveniles of 60% of the expected fish species were collected in the fishway, and two major upstream migrations occurred. Most Labeo and... -
Chironomid distribution along a pollution gradient in Ethiopian rivers, and their potential for biological water quality monitoring
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Beneberu --- Department of Biology, Ethiopia S Mengistou --- Zoological Sciences Programme Unit, Ethiopia H Eggermont --- Belgian Biodiversity Platform, Belgium D Verschuren --- Limnology Unit, Department of Biology, BelgiumWater pollution resulting from the rapidly intensifying use of freshwater resources in Ethiopia is increasing the need for continuous follow-up and monitoring of the country's aquatic ecosystems, in order to maintain their biological diversity and water quality. Chironomids (non-biting dipteran... -
Conserving Surface-nesting Seabirds at the Prince Edward Islands: The Roles of Research, Monitoring and Legislation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford J. CooperSouth Africa's subantarctic Prince Edward Islands support substantial proportions of the global populations of a number of surface-nesting seabirds. Populations of most of these have decreased at the islands since the 1980s and 12 of 16 species are regarded as... -
Modelling stock dynamics in the southern Benguela ecosystem for the period 1978–2002
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L. J. Shannon V. Christensen C. J. WaltersAn ecosystem model of the southern Benguela was fitted to available time-series data for the period 1978–2002, to explore how changes in target fish populations in this ecosystem can be attributed to feeding interaction terms and population control patterns, the... -
Limits to the use of environmental indices to reduce risk and/or increase yield in the South African anchovy fishery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JAA De Oliveira DS ButterworthEnvironmental indices that provide short-term predictions of recruitment have the potential to improve the average yield from highly productive resources that sustain recruit fisheries without an associated increase in risk (of resource 'collapse'). This is particularly true for cases where... -
Towards the development of an environmental rule-based model for predicting recruitment in Brazilian sardine Sardinella brasiliensis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Jablonski LFL LegeyA rule-based model was built in order to analyse the effects of environmental variables (wind stress, Ekman transport, turbulence, and sea surface temperature [SST]) on the recruitment of the Brazilian sardine Sardinella brasiliensis. The purpose of modelling was (1) to... -
A demonstration of the hydrographic partition of the Benguela upwelling ecosystem at 26°40'S
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CM Duncombe RaeContinuous CTD data from a series of recent cruises show that the distribution of the water mass characteristics in the central Benguela region from the Orange River mouth (28°38'S) to alvis Bay (22°57'S) is discontinuous in the central and intermediate... -
A test of an autonomous underwater vehicle as a monitoring tool in shallow water
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PA Tester SR Kibler B Hobson RW LitakerThe utility of micro-autonomous underwater vehicles (AUVs) to detect hydrographic features that concentrate phytoplankton cells was evaluated during a study in a shallow tidal estuary. This study represented the first field test of Ranger™, a micro-AUV adapted for environmental applications... -
Comparison of assemblages and some life-history traits of seabirds in the Humboldt and Benguela systems
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford E Goya J-P Roux CB ZavalagaThere are 21 and 15 species of seabirds that breed in the Humboldt and Benguela upwelling systems respectively. Only two species of gull are common to both systems, one as an endemic subspecies to the Benguela system. Eleven species and... -
The barnacles Chirona (Striatobalanus) amaryllis (Darwin 1854) and Megabalanus coccopoma (Darwin 1854) (Crustacea, Cirripedia): two invasive species new to tropical West African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Kerckhof --- Management Unit of the North Sea Mathematical Models, Belgium J Haelters --- Management Unit of the North Sea Mathematical Models, Belgium S Degraer --- Management Unit of the North Sea Mathematical Models, BelgiumThe collection of the barnacle Chirona (Striatobalanus) amaryllis (Darwin 1954) (Crustacea, Cirripedia) from the hull of a ship that had been operating for five months in the Gulf of Guinea and off Sierra Leone triggered a closer investigation of the... -
Broad-scale distribution patterns of sardine and their predators in relation to remotely sensed environmental conditions during the KwaZulu-Natal sardine run
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SH O’Donoghue --- School of Biological and Conservation Sciences, South Africa L Drapeau --- , France VM Peddemors --- School of Biological and Conservation Sciences, South AfricaThe annual movement of South African sardine Sardinops sagax up the east coast of South Africa, known as the ‘sardine run’, was investigated using data from aerial surveys for the period 1988–2005 and compared with remotely sensed sea surface temperature... -
Analysing environmental and fishing effects on a short-lived species stock: the dynamics of the octopus Octopus vulgaris population in Senegalese waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Thiaw --- , Sénégal D Gascuel --- , France D Thiao --- , Sénégal OT Thiaw --- , Sénégal D Jouffre --- , SénégalShort-lived species are extremely dependent on the seasonal and interannual variability of environmental conditions, and determining their stock status is often difficult. This study investigates the effects of environmental variability and fishing pressure on the stock of octopus Octopus vulgaris... -
Population dynamics of southern elephant seals: a synthesis of three decades of demographic research at Marion Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PA Pistorius --- Department of Zoology, South Africa PJN de Bruyn --- Department of Zoology and Entomology, University of Pretoria, South Africa MN Bester --- Department of Zoology and Entomology, University of Pretoria, South AfricaSouthern elephant seal Mirounga leonina numbers declined precipitously throughout most of their circumpolar distribution since the 1950s. A long-term intensive demographic programme was initiated in 1983 on the relatively small population of southern elephant seals at sub-Antarctic Marion Island in... -
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... -
Sustainable African Built Environments
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Jeremy Gibberd --- , South AfricaCarbon emission scenarios are used as key inputs to the sustainability and built environment strategies and policies of many developed countries. Decisions and direction in these are based on carbon emission models which show the optimum mix of interventions required... -
Using chlorophyll fluorescence to determine stress in Eucalyptus grandis seedlings
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Carol A. Rolando --- , Keith M. Little --- ,Since several environmental factors affect the functioning of the photosynthetic system, the status of the photosynthetic apparatus is a good indicator of the plant in terms of stress and stress adaptation. The measurement of chlorophyll fluorescence with a portable fluorimeter... -
Genotype by environment interaction for volume growth at 6 years of age in a series of five Pinus patula progeny trials in southern Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Arnulf Kanzler --- Sappi Forest Research, South Africa Sieg F. Hagedorn --- , South Africa Gary R. Hodge --- CAMCORE, USA William S. Dvorak --- CAMCORE, USAGenotype x environment interaction was investigated in a series of 5 Pinus patula progeny trials planted by the Institute for Commercial Forestry Research in southern Africa. The trials were established from Mpumalanga to the North-eastern Cape in a balanced 7x7... -
Socio-economic impact of ox skidding project to the surrounding villages of Mount Meru forest plantations, Northern Tanzania
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: W.S. Abeli --- Faculty of Forestry and Nature Conservation, Tanzania J.R. Maximillian --- Faculty of Forestry and Nature Conservation, Tanzania A.E. Kweka --- Faculty of Forestry and Nature Conservation, Tanzania D.T.K. Shemwetta --- Faculty of Forestry and Nature Conservation, TanzaniaThe ox skidding project was initiated with the objective ofusing oxen for transporting logs from the stump sites to the landings. It was supposed to be a participatory research project aimed at integrating scientific knowledge with practical skills and resource... -
Establishment of a Nothofagus alessandrii plantation using different levels of shade and weed control methods in Talca province, central Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: R Santelices --- Department of Forestry Science and Dryland Technology Centre, Faculty of Agrarian and Forestry Sciences, Chile F Drake --- Department of Forest Management and Environment, Faculty of Forestry Sciences, Chile RM Navarro-Cerrillo --- Department of Forest Engineering, Faculty of Agronomy and Forestry, SpainThere is a lack of information regarding the establishment of Nothofagus alessandrii plantations, including any impacts that shading and weed control may have on early survival and growth. A trial was therefore initiated where four shade levels (0% and Rachel®... -
Growth potential of Eucalyptus cypellocarpa as an alternative species for the mid-altitude summer rainfall region of South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Christopher Komakech --- Forestry and Forestry Products, South Africa Tammy-L Swain --- , South Africa Annabel Fossey --- Biotechnology, South AfricaEucalyptus grandis is predominantly cultivated in the humid, warmer temperate, subtropical regions in South Africa for pulp and paper production because of its rapid growth and desirable wood properties. With forestry expanding into mid-altitude drier and warmer, or drier and... -
Genetic characterisation of a Eucalyptus nitens base breeding population in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tammy-L Swain --- Institute for Commercial Forestry Research, South Africa SteveD Verryn --- Forestry and Agricultural Biotechnology Institute, South Africa MarkD Laing --- School of Agricultural Earth and Environmental Sciences, South AfricaThe measurement and statistical analysis of data from eight Eucalyptus nitens trials, established in the summer rainfall forestry region of South Africa during the 1980s and 1990s, have enabled the characterisation of the Institute for Commercial Forestry Research's breeding population... -
Clinical waste management in the context of the Kanye community home-based care programme, Botswana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: SimonM Kang'etheThis study examines clinical waste disposal and handling in the context of a community home-based care (CHBC) programme in Kanye, southern Botswana. This qualitative study involved 10 focus group discussions with a total of 82 HIV/AIDS primary caregivers in Kanye,... -
Assessment of HIV-positive in-patients using the International Classification of Functioning, Disability and Health (ICF) at Chris Hani Baragwanath Hospital, Johannesburg
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Hellen Myezwa Aimee Stewart Eustasius Musenge Paul NesaraThe International Classification of Functioning, Disability and Health (ICF) short-version checklist was used to assess the impairments, activity limitations and participation restrictions experienced by a sample of HIV-positive in-patients admitted to Chris Hani Baragwanath Hospital in Johannesburg, South Africa. Laboratory... -
Human impact on lake ecosystems: the case of Lake Naivasha, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GeorgeE Otiang'a-Owiti Ignatius Abiya OsweLake Naivasha is a wetland of national and international importance. However, it is under constant anthropogenic pressures, which include the quest for socioeconomic development within the lake ecosystem itself as well as other activities within the catchment. The lake is... -
The effect of biotope-specific sampling for aquatic macroinvertebrates on reference site classification and the identification of environmental predictors in Mpumalanga, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HelenF DallasThe classification of reference sites based on macroinvertebrate assemblages sampled in different aquatic biotopes in Mpumalanga, South Africa, was examined. Environmental variables that best predicted group membership for each of four classifications (stones, vegetation, sand and these three biotopes combined)... -
The community composition and biomass of pelagic ciliated protozoa in East African lakes
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AndrewW Yasindi WilliamD Taylor DenisH LynnThe community composition and biomass of planktonic ciliates were studied in 17 tropical East African lakes varying from freshwater to saline, and from oligotrophic to eutrophic. The conductivity of the lakes varied from 207μS cm−1 to 70 000μS cm−1. Chlorophyll... -
Changes in algal composition and environmental variables in the high-altitude Mohale Dam — an important water supply reservoir to South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Sanet Janse van Vuuren Nicolene van der Walt Annelie SwanepoelWhereas limited knowledge exists on the ecology and algae present in Lesotho's high-altitude Katse Dam, nothing is published about these aspects in the linked Mohale Dam, completed in 2003. This study investigated the changes in algal composition and associated environmental... -
Trends analysis relating to pollution in Sakumo Lagoon, Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Ruby Asmah Hedrick Dankwa CA Biney CC AmankwahSakumo Lagoon, situated near Accra, is a Ramsar-listed coastal wetland threatened by urban and agricultural waste, being located in an urban area where access to domestic and waste disposal facilities is a major problem. The aim of this study was... -
Effect of an impoundment on nutrient dynamics in the Kihansi River, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RJ Ideva J Machiwa F Schiemer T HeinThe impact of the Kihansi Dam on electrical conductivity, pH, temperature and dissolved oxygen in the Kihansi River was assessed in 2005 after 85% of the original river flow had been diverted to the Lower Kihansi power plant. The results... -
Nature and pattern of lagoon fisheries resource utilisation and their implications for waterbird management in coastal Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: F Gbogbo W Oduro SK OppongSeasonal patterns in human fisheries resource utilisation and the capture characteristics of fish, swimming crabs and land crabs harvested from four coastal lagoons in Ghana between September 2005 and August 2007 are described. These are discussed in relation to sustainable... -
Micro-distribution of freshwater snails before and after water flow events in hydraulic structures in Tessaout Amont irrigation system, Morocco
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: H Laamrani H Madsen E BoeleeBulinus truncatus, the intermediate host of Schistosoma haematobium, is widely distributed in modern irrigation schemes in Morocco. These schemes have intermittent irrigation and canals dry out in between irrigation periods. The snail species is therefore associated with the 'siphon boxes'... -
Application of a fish health assessment index and associated parasite index to Clarias gariepinus (Teleostei: Clariidae) in the Vaal River system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Crafford --- Department of Zoology, South Africa A Avenant-Oldewage --- Department of Zoology, South AfricaThe aim of this study was to determine if the fish health assessment index (HAI) developed in the USA and associated parasite index (PI), when applied to Clarias gariepinus at two localities in the upper and middle Vaal River system,... -
Towards the development of environmental indices for the Namibian shelf, with particular reference to fisheries management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CH Bartholomae AK van der PlasThe Namibian Ministry of Fisheries and Marine Resources has the task of collecting and providing relevant oceanographic information for management of their fisheries. However, quality information is difficult to provide because of the complexity of the processes involved in the... -
Abrupt environmental shift associated with changes in the distribution of Cape anchovy Engraulis encrasicolus spawners in the southern Benguela
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Roy CD van der Lingen JC Coetzee JRE LutjeharmsCape anchovy Engraulis encrasicolus spawners in the southern Benguela showed an eastward shift in their distribution on the Agulhas Bank that occurred abruptly in 1996 and has since persisted. We assessed whether this shift was environmentally mediated by examining sea... -
Estuarine use by spotted grunter Pomadasys commersonnii in a South African estuary, as determined by acoustic telemetry
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A-R Childs PD Cowley TF Næsje AJ Booth WM Potts EB Thorstad F ØklandFactors influencing estuarine use and marine excursions by spotted grunter Pomadasys commersonnii in the Great Fish Estuary, South Africa, were studied using manual and automated telemetry methods. In all, 20 individuals, ranging from 362 mm to 698 mm total length... -
Large-scale changes in the spatial distribution of South African West Coast rock lobsters: an overview
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Cockcroft D van Zyl L HutchingsA major shift in resource availability in the West Coast rock lobster Jasus lalandii from the traditional fishing grounds on the West Coast to the more southern fishing grounds was observed between the late 1980s/early 1990s and the turn of... -
Implications for seabirds off South Africa of a long-term change in the distribution of sardine
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford PS Sabarros T Fairweather LG Underhill AC WolfaardtFrom 1997 to 2005, the distribution of sardine Sardinops sagax, an important prey item for four seabirds off South Africa, shifted 400 km to the south and east, influencing its availability to breeding birds. It became progressively less available to... -
Comparing internal and external drivers in the southern Benguela and the southern and northern Humboldt upwelling ecosystems
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LJ Shannon S Neira M TaylorTrophic models of three upwelling ecosystems, the southern Benguela (South African), southern Humboldt (Chilean) and northern Humboldt (Peruvian) systems, have been fitted to catch, abundance and fishing mortality time-series. Three drivers were considered during the model fitting: internal forcing by... -
Comparison of, and the effects of altered freshwater inflow on, fish assemblages of two contrasting South African estuaries: the cool-temperate Olifants and the warm-temperate Breede
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SJ Lamberth L van Niekerk K HutchingsThis study compares the fish assemblages of the permanently open cool-temperate Olifants and warm-temperate Breede estuaries on the west and south coasts of South Africa respectively, and their responses to altered freshwater flows. Both estuaries have experienced a >35% reduction... -
Use of environmental parameters to explain the variability in spawnerrecruitment relationships of Namibian sardine Sardinops sagax
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CH Kirchner --- National Marine Information and Research Centre, Namibia CH Bartholomae --- National Marine Information and Research Centre, Namibia A Kreiner --- National Marine Information and Research Centre, NamibiaThis study attempts to explain the variability in recruitment of sardine in the northern Benguela and to develop potential models by including environmental information to predict recruitment. Two different recruitment and spawner number datasets were available: a VPA-developed dataset, for... -
Phenotypic plasticity and local adaptation in two extreme populations of Acacia karroo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G Bayonne Mboumba D WardPhenotypic plasticity is the effect of growth variability in response to different environmental conditions. Adaptive phenotypic plasticity is more specific; it is the ability of a single genotype to produce an array of phenotypes depending on the environmental extent. We... -
Some thoughts on policy and desertification: what key contributions can scientists make to policy processes in the southern African context?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J Zeidler --- Integrated Environmental Consultants Namibia (IECN), NamibiaTwo types of desertification professionals are typically characterised—the scientist and the policy-maker. After many years of efforts to combat desertification and promote sustainable land management, it is surprising that these diverging perceptions remain so fixed. They prevailed throughout the process... -
Secondary Traumatic Stress, Psychological Wellbeing and Life Satisfaction of Social Workers in Namibia
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Martina Perstling --- University of Namibia, Sebastiaan Rothmann --- North-West University, South AfricaThe aim of this study was to investigate the relationships among secondary traumatic stress, psychological wellbeing (purpose in life, environmental mastery and self-acceptance) and life satisfaction of social workers of Namibia. A cross-sectional survey design was used with a sample... -
Congruent, decreasing trends of gentoo penguins and Crozet shags at sub-Antarctic Marion Island suggest food limitation through common environmental forcing
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa BM Dyer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa L Upfold --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa AB Makhado --- Branch: Oceans and Coasts, Department of Environmental Affairs, South AfricaNumbers of gentoo penguins Pygoscelis papua and Crozet shags Phalacrocorax [atriceps] melanogenis breeding annually at Marion Island, one of South Africa's Prince Edward Islands in the South-West Indian Ocean, were strongly correlated over 19 split-years from 1994/1995 to 2012/2013. Both... -
Alternative approaches to Red-billed Quelea Quelea quelea management: mass-capture for food
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Clive CH Elliott --- Blue Barn House, South Leigh, UK Boaz N Mtobesya --- Plant Health Services, Tanzania Robert A Cheke --- Natural Resources Institute, UKOrganophosphate pesticide spraying or the deployment of explosives as standard practices for controlling quelea breeding colonies or roosts that threaten small-grain crops in Africa have negative side-effects on non-target birds and on the environment. Mass-capture techniques were tested as an... -
Population dynamics of potentially harmful algal blooms in Bizerte Lagoon, Tunisia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Bouchouicha Smida --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie I Sahraoui --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie B Grami --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie H Hadj Mabrouk --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, Tunisie A Sakka Hlaili --- Laboratoire de Cytologie Végétale et Phytoplanctonologie, Département des Sciences de la Vie, Faculté des Sciences de Bizerte, TunisieThe population dynamics of potentially harmful phytoplankton in the semi-closed, coastal Bizerte Lagoon, Tunisia, in the south-western Mediterranean, were examined from November 2007 to February 2009 at six sampling stations, three situated in areas of mussel and oyster farming. The... -
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... -
Genotype × environment interactions and yield stability of stress-tolerant open-pollinated maize varieties in the Eastern Cape province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vimbayi GP Chimonyo --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Charles S Mutengwa --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Cornelius Chiduza --- Department of Agronomy, Faculty of Science and Agriculture, South AfricaGenotype × environment interactions are inherent in multilocational trials and complicate identification of superior genotypes. The aim of the study was to determine yield performance and stability of 13 maize genotypes in five locations of the Eastern Cape province, South... -
Anaesthetic gases: environmental impact and alternatives
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: M Bosenberg --- Department of Anaesthesia,Little consideration has been given to the environmental impact of gaseous anaesthetic use. All currently used volatile anaesthetics are halogenated and chemically similar to chlorofluorocarbons (CFCs), giving them the potential to impact the environment negatively via both ozone depletion and... -
Jet lag and environmental conditions that may influence exercise performance during the 2010 FIFA World Cup in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: MP Schwellnus --- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, EW Derman --- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology,The 2010 FIFA World Cup will be held in South Africa in June/July 2010. This is the largest international sports event ever to be held in this country. At this time 32 international football teams, with their management and supporters,... -
Home-based care: caring for people in the community—challenges and opportunities
Item type: Journal Article • Journal: South African Family Practice • Authors: E Jack --- Department of Family Medicine (George Complex), South Africa L Jenkins --- Department of Family Medicine (George Complex), South Africa D Enslin --- Elective period at George Complex, -
Iron status and anaemia of chronic disease in HIV-infected African women in Mangaung, Bloemfontein
Item type: Journal Article • Journal: South African Family Practice • Authors: CM Walsh --- Department of Nutrition and Dietetics, Faculty of Health Sciences, Z Hattingh --- Department of Nutrition and Dietetics, Faculty of Health Sciences, FJ Veldman --- Fibrinogen Unit, CJ Bester --- Department of Biostatistics, Faculty of Health Sciences,Background: Anaemia occurs widely among people living with HIV/AIDS. The aim of this study was to investigate the effect of HIV status on iron status, more specifically to investigate the nutritional health of women between 25 and 44 years of... -
Work stress, work–home interference and perceptions of organisational culture amongst insurance employees in Zimbabwe
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Rudolf M. Oosthuizen --- Department of Industrial and Organisational Psychology, Delene Visser --- Department of Industrial and Organisational Psychology, Peggy T.V. Mudzimu --- Department of Industrial and Organisational Psychology,The objective of the study was to determine the relationship between work stress, work-home interference, and perceptions of organisational culture amongst insurance employees in the Zimbabwean context. Data were collected from a sample of 190 employees (females=46%) who completed the... -
Acute toxicity of selected heavy metals to Oreochromis mossambicus fry and fingerlings
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TB Mashifane --- Aquaculture Research Unit, School of Agricultural and Environmental Sciences, South Africa NAG Moyo --- Aquaculture Research Unit, School of Agricultural and Environmental Sciences, South AfricaAcute toxicity of copper, lead and iron to tilapia Oreochromis mossambicus fry and fingerlings was tested using 24 h to 96 h static non-renewal toxicity tests. Three methods, probit analysis, Spearman–Karber and a linear regression model, were used to calculate... -
Rational agent-based understanding of the informal sector: A critical assessment
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: René Rivera-Huerta --- Postgraduate programme in Economics and Management of Innovation, MexicoThe main economic theories that have studied the informal sector have had little success in explaining the consistencies founded empirically and in proposing efficient policies to bring up to date the non-structured sector. This work proposes that more suitable theoretical... -
Winners and losers – responses to recent environmental change by South African seabirds that compete with purse-seine fisheries for food
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robert JM Crawford --- Branch Oceans and Coasts, South Africa Azwianewi B Makhado --- Branch Oceans and Coasts, South Africa Lauren J Waller --- CapeNature, South Africa Philip A Whittington --- Department of Zoology, South AfricaThere were recent changes in the distributions of the main prey of four seabirds off South Africa, with sardine Sardinops sagax and anchovy Engraulis encrasicolus shifting from South Africa's north-west coast towards the south-east. This contributed to numbers of African... -
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... -
Mutuality from above: urban crisis, the state and the work of Comissões de Moradores in Luanda
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: António Tomás --- African Centre for Cities, South AfricaMy paper discusses the emergence of new regimes of mutuality in the context of a crisis in the built environment of Luanda. By 1991, Luanda's city centre had suffered years of neglect and talk of an urban crisis abounded. The... -
Contextual analysis of home environment factors influencing the acquisition of early reading skills in Zambian families
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Tamara Chansa-Kabali --- Department of Psychology, Zambia Robert Serpell --- Department of Psychology, Zambia Heikki Lyytinen --- University of Jyväskylä, FinlandThis study examined the effect of home environment factors in the acquisition of early reading skills (orthographic awareness and decoding competence). To assess these factors, a sample of seventy-two (72) first grade learners (females = 55%; age range = 7–8 years) and their maternal... -
Species-specific impact of introduced largemouth bass Micropterus salmoides in the Groot Marico Freshwater Ecosystem Priority Area, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PK Kimberg --- Hydrocynus Consulting, South Africa DJ Woodford --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa H Roux --- Department of Rural, Environment and Agricultural Development, South Africa OLF Weyl --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaLargemouth bass Micropterus salmoides are among the world's 100 worst invaders and negatively affect aquatic biodiversity in many regions worldwide. In South Africa there is a paucity of empirical studies describing their impacts. The impact of M. salmoides on the... -
Patterns of chironomid body-size distribution in an effluent-impacted river in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ON Odume --- Unilever Centre for Environmental Water Quality, South Africa CG Palmer --- Unilever Centre for Environmental Water Quality, South Africa FO Arimoro --- Department of Biological Sciences, Nigeria PK Mensah --- Unilever Centre for Environmental Water Quality, South AfricaBody size is an important determinant of assemblage structure in rivers and streams impacted by elevated concentrations of pollutants such as salts and metals. In the present study, because of the larger surface-area-tovolume ratio of small-bodied chironomid species compared with... -
Factors which predict interpersonal violence in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Lincoln J Fry --- Sociology and Health Research Units, GreeceBackground: This paper responds to the call for an extensive research agenda to be developed and designed to identify, plan and then implement prevention programmes with respect to violent crime in South Africa. This study began that process by identifying... -
Understanding the diffusion modes of grassroots innovations in India: A study of Honey Bee Network supported innovators
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Dinesh Abrol --- Institute of Studies in Industrial Development & Centre for Studies in Science Policy, Jawaharlal Nehru University, India Ankush Gupta --- Department of Civil Engineering, IndiaIn this paper we examine the outcomes and connections of preferences of the non-formal innovators identified by the Honey Bee Network (HBN) in India. The chosen mode of diffusion of each innovation has been correlated to socio-economic backgrounds, origins of... -
Exploring the potential of host-environment relationships in the control of schistosomiasis in Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Monde --- Department of Aquatic Ecology and Water Quality Management, The Netherlands S Syampungani --- Department of Plant and Environmental Sciences, Zambia PJ Van den Brink --- Department of Aquatic Ecology and Water Quality Management, The NetherlandsA number of human disease prevalences are supported by host-parasite-environment interactions. One such disease is schistosomiasis. Schistosoma parasites are transmitted between the snail intermediate hosts and mammalian definitive hosts in an aquatic environment. This host-environment link determines the parasite transmission... -
Waterfowl abundance and diversity in relation to season, wetland characteristics and land-use in semi-arid South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Ashley A. Raeside --- Department of Biology, Canada Scott A. Petrie --- Long Point Waterfowl and Wetlands Research Fund, Bird Studies Canada, Canada Thomas D. Nudds --- Department of Integrative Biology, Ecology Group, CanadaWe studied waterfowl abundance and diversity in relation to season (wet vs dry), wetland characteristics (vegetation and morphometrics) and land-use in a semi-arid agricultural region of South Africa to determine how waterfowl respond to various wetland characteristics, particularly those of... -
Foraging at wastewater treatment works increases the potential for metal accumulation in an urban adapter, the banana bat (Neoromicia nana)
Item type: Journal Article • Journal: African Zoology • Authors: S. Naidoo --- School of Life Sciences, University of KwaZulu-Natal, South Africa D. Vosloo --- School of Life Sciences, University of KwaZulu-Natal, South Africa M. C. Schoeman --- School of Life Sciences, University of KwaZulu-Natal, South AfricaWastewater treatment works (WWTWs) are known to provide profitable foraging areas for insectivorous bats in Europe and the New World because of their association with high abundance of pollution-tolerant midges (Diptera). However, bats that feed on these insects may also... -
Seasonal differences in foraging dynamics, habitat use and home range size of Wahlberg’s epauletted fruit bat in an urban environment
Item type: Journal Article • Journal: African Zoology • Authors: Dominic P. Rollinson --- School of Life Sciences, University of KwaZulu-Natal, South Africa Joy C. Coleman --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T. Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaUrbanization through the process of habitat loss and fragmentation affects ecosystems. Many species are no longer able to survive in these urban areas; however, there are some that have been able to persist and even thrive in these habitats. One... -
Roost temperature and fidelity of Wahlberg’s epauletted fruit bat, Epomophorus wahlbergi, in an urban environment
Item type: Journal Article • Journal: African Zoology • Authors: Dominic P. Rollinson --- School of Life Sciences, University of KwaZulu-Natal, South Africa Joy C. Coleman --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T. Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaGenerally,Wahlberg’s epauletted fruit bat (Epomophorus wahlbergi) roost in trees or under the eaves of buildings. This study investigated the roosting dynamics of E. wahlbergi in the urban environment of Pietermaritzburg, South Africa. To determine roost fidelity bats were radiotracked to... -
Social responsibility disclosure by South African industrial holding companies: a research note
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: C de Villiers --- Department of Accounting and Finance,The disclosure of social responsibility in the 1982, 1987, 1992 and 1997 annual reports of ten companies listed in the industrial holdings section of the Johannesburg Stock Exchange was analysed. Information on employee-related matters is disclosed most often, followed by... -
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... -
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... -
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... -
A Note: Estimating the relationship between environmental performance and economic performance of South African mining companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: T F Prinsloo --- Faculty of Economic and Management Sciences, M Oberholzer --- Faculty of Economic and Management Sciences,The purpose of the study is to determine the relationship between environmental performance and economic performance in the South African mining industry, where the economic performance consists of market-based and accounting-based estimates. In this regard, Spearman’s ranking-order correlation was applied... -
Government control structure and allocation of credit: evidence from government-owned companies in China
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Kun Su --- School of Management, China Rui Wan --- School of Economics, China Taiwen Feng --- School of Management, ChinaThis paper examines the effects of government control structure on the allocation of bank credit to government-owned firms in China. It particularly examines the extent to which differences in institutional environments across the diverse regions of China affect the nexus... -
Rekeningkimde vir natuurlike hulpbronne en die FASB se konseptuele raamwerk
Item type: Journal Article • Journal: De Ratione • Authors: Q Vorster --- Universiteit van Pretoria, D S Lubbe --- Universiteit van die OVS, -
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... -
Impact of marine inundation after a period of drought on the lakeshore vegetation of Lake St Lucia, South Africa: resilience of estuarine vegetation
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EJJ Sieben --- Department of Plant Sciences, South Africa WN Ellery --- Department of Geography, South Africa BW Dullo --- Center for Energy and Environmental studies, The Netherlands AP Grootjans --- Center for Energy and Environmental studies, The NetherlandsThe shore of Lake St Lucia in the vicinity of Catalina Bay, in the southern part of the lake, receives freshwater input as surface and groundwater seepage from the adjacent elevated coastal plain. Vegetation, water quality and landform were recorded... -
An assessment of the risk factors for pulmonary tuberculosis among adult patients suffering from human immunodeficiency virus attending the Wellness Clinic at Themba Hospital
Item type: Journal Article • Journal: South African Family Practice • Authors: Felix Alberto Herrera Rodriguez --- Medical Department, South Africa Samuel Onoja Agbo --- Family Medicine department, South AfricaBackground: In South Africa, the data about risk factors for pulmonary tuberculosis (PTB) is limited. Therefore, the assessment of risk factors for PTB is an important step to identify which risk factors are unique in every specific population context and... -
Household Enterprise in Base-of-the-Pyramid Markets: the Influence of Institutions and Family Embeddedness
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Justin W. Webb --- University of North Carolina at Charlotte, USA Christopher G. Pryor --- High Point University, USA Franz W. Kellermanns --- University of North Carolina at Charlotte, USANearly half of the population in Africa lives on less than $1.25 per day in what scholars refer to as base-of-the-pyramid (BOP) markets. More broadly, BOP markets account for two billion of the world's population living in extreme poverty. Household... -
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... -
CEO's use of financial and non-financial performance measures: Manufacturing companies in Mauritius and Australia compared
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: DW Taylor --- School of Accounting, Curtin University of Technology, Australia T Soobaroyen --- School of Management, University of Mauritius, C Ah-Hen --- School of Management, University of Mauritius,It is contended in a body of management accounting literature that financial performance measures are being rendered less relevant than non-financial measures in the management of companies. Such a management trend towards non-financial performance measures is particularly applicable to manufacturing... -
Anaesthesia for a patient with beta thalassaemia major
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: T Kallenbach --- Department of Anaesthesia, South AfricaWhile beta thalassaemia is not a common disorder with an estimated 100 000 severely affected individuals worldwide, improved survival rates and increased global migration means an increased frequency of such patients being seen for various surgeries. The different aspects of this... -
Growth Performance of Two Crossbred Rabbit Genotypes Fed Two Levels of Dietary Protein
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: O. M. Momoh --- Department of Animal Breeding and Physiology, H. U. Unung --- Department of Animal Breeding and Physiology, S. Attah --- Department of Animal Production, NigeriaA study was undertaken in which two crossbred rabbit genotypes were fed two levels of dietary crude protein with the objectives of assessing and comparing their growth performances as well as investigate any possible genotype × protein level interaction. Twenty-four... -
Agronomic performance of new cream to yellow-orange sweetpotato cultivars in diverse environments across South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sunette M Laurie --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Sidwell S Tjale --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Andre A van den Berg --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Musa M Mtileni --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Maryke T Labuschagne --- Department of Plant Sciences, South AfricaSweetpotato is grown in diverse environments of South Africa by both commercial and subsistence farmers. The aim of the present study was to assess the stability, agronomic performance and palatability of new ARC cultivars bred for the informal market, and... -
The case for environmental flow determination for the Phongolo River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Dube --- Laboratory of Aquatic Ecology, Evolution and Conservation, Belgium V Wepener --- Research Unit for Environmental Sciences and Management, South Africa JHJ van Vuren --- Department of Zoology, South Africa N Smit --- Research Unit for Environmental Sciences and Management, South Africa L Brendonck --- Laboratory of Aquatic Ecology, Evolution and Conservation, BelgiumThe construction of Pongolapoort Dam in 1973 on the Phongolo River in KwaZulu-Natal, South Africa, has considerably altered the hydrological behaviour and ecological response of the downstream floodplain. Changes in the flooding regime have had implications for the socio-economic importance... -
Impact of land use on water quality in the Likangala catchment, southern Malawi
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Pullanikkatil --- Department of Geography and Environmental Sciences, South Africa LG Palamuleni --- Department of Geography and Environmental Sciences, South Africa TM Ruhiiga --- Department of Geography and Environmental Sciences, South AfricaIn southern Malawi, the Likangala River, which is important for irrigation, domestic use and fishing, is affected by various land uses along its catchment. The impact of urbanisation and agriculture on the water quality of this river was investigated in... -
Rural people's perceptions of wildlife conservation—the case of the Masebe Nature Reserve in Limpopo Province, South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Chris Boonzaaier --- Department of Anthropology & Archaeology,The First World rationale for nature conservation is usually the aesthetic and recreational experiences and opportunities that nature provides and its scientific importance, but rural populations in Africa tend to focus on the utilisation of natural resources. This paper argues... -
Population increase and nest-site selection of Cattle Egrets Bubulcus ibis at a new colony in drylands of north-east Algeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Majda Sbiki --- Department of Natural and Life Sciences, Algeria Haroun Chenchouni --- Department of Natural and Life Sciences, Algeria Abdelkrim Si Bachir --- Department of Natural and Life Sciences, AlgeriaColony occupation by Cattle Egrets Bubulcus ibis at an arid location in north-east Algeria lasted from mid-March or April to August. The colony, which was founded in 2003, increased from 124 pairs in 2007 to 250 pairs in 2011 and... -
The effects of stock size and environmental variability on Cape hake recruitment in Namibia: an unsolved puzzle (a comment on Kainge et al. 2013)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J-P Roux --- Lüderitz Marine Research, Namibia MR Wilhelm --- Marine Science Institute, USAMeasuring and forecasting recruitment are central to the understanding and management of fish stocks. Kainge et al. (2013) studied the effect of spawning stock size and environmental fluctuations on the recruitment levels of the Cape hake Merluccius capensis in Namibia... -
Perceptions of the utility of personality assessment for personnel selection in the South African context: An exploratory study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sapna Fakir --- Department of Psychology, South Africa Sumaya Laher --- Department of Psychology, South AfricaThis study explored South African industrial psychologists’ perceptions of the utility of personality assessment for personnel selection. Eleven industrial psychologists (2 male, 9 female) from the Johannesburg area, South Africa were the participants. They participated in semi-structured interviews exploring their... -
Application of geographical information system and remote sensing in malaria research and control in South Africa: a review
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Abiodun Morakinyo Adeola --- Department of Geography, Geoinformatics and Meteorology, South Africa Joel O Botai --- Department of Geography, Geoinformatics and Meteorology, South Africa Jane Mukarugwiza Olwoch --- South African Space Agency (SANSA), Earth Observation Directorate, South Africa Hannes CJ de W Rautenbach --- Department of Geography, Geoinformatics and Meteorology, South Africa Ahmed M Kalumba --- Department of Geography, Geoinformatics and Meteorology, South Africa Philemon L Tsela --- Department of Geography, Geoinformatics and Meteorology, South Africa Mayowa Omolola Adisa --- Department of Geography, Geoinformatics and Meteorology, South Africa Nsubuga Francis Wasswa --- Department of Geography, Geoinformatics and Meteorology, South Africa Paul Mmtoni --- Department of Geography, Geoinformatics and Meteorology, South Africa Ausi Ssentongo --- Department of Geography, Geoinformatics and Meteorology, South AfricaThis paper presents a review of numerous items of published literature on the use of spatial technology for malaria epidemiology in South Africa between 1930 and 2013. In particular, focus is on the use of statistical and mathematical models as... -
Does the current land tenurial arrangement in Ghana incentivise adoption of environmentally sustainable cocoa production practices? A case study of four selected cocoa growing districts in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Wilhelmina Quaye --- CSIR-Science and Technology Policy Research Institute, Ghana Richard Ampadu --- CSIR-Science and Technology Policy Research Institute, Ghana Justina Onumah --- CSIR-Science and Technology Policy Research Institute, Ghana Atsu Titiati --- United Nations Development Programme, GhanaA total of 231 cocoa farmers were interviewed through a structured survey in selected districts in the Eastern, Ashanti, Brong Ahafo and Western regions of Ghana to explore their views on how the existing land tenurial arrangement incentivise sustainable cocoa... -
Termite species richness, composition and diversity on five farms in southern Kunene region, Namibia
Item type: Journal Article • Journal: African Zoology • Authors: J. Zeidler --- Integrated Environmental Consultants Namibia, Namibia S. Hanrahan --- Department of Animal, Plant and Environmental Sciences, South Africa M. Scholes --- Department of Animal, Plant and Environmental Sciences, South AfricaA survey was conducted on five farms in former Damaraland, a communal farming area in arid northwestern Namibia. The aims of the survey were to establish termite inventories for each site and to investigate whether termite diversity is determined by... -
An assessment of biodiversity surrogacy options in the Limpopo Province of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: B. Reyers --- Conservation Planning Unit, South Africa K.J. Wessels --- Geo Informatics Division, Institute for Soil, South Africa A.S. van Jaarsveld --- Conservation Planning Unit, South AfricaBecause of the inadequacy of existing biodiversity distribution data, surrogate measures for regional biodiversity have long been used in conservation area selection. These measures include species and environmental data. However, the assumed relationship between surrogate measures and regional biodiversity has... -
Population surveys of the ice rat Otomys sloggetti robertsi in the Lesotho Drakensberg
Item type: Journal Article • Journal: African Zoology • Authors: Thabiso Mokotjomela --- School of Animal Plant and Environmental Sciences, South Africa Ute Schwaibold --- School of Animal Plant and Environmental Sciences, South Africa Neville Pillay --- School of Animal Plant and Environmental Sciences, South AfricaIncreasing environmental temperatures may lead to better survival of organisms that are usually susceptible to low temperatures. We investigated whether the numbers of the ice rat Otomys sloggetti robertsi, whose populations are regulated by low temperatures, have increased in the... -
Occurrence, abundance and distribution of benthic macroinvertebrates in the Nyando River catchment, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DA Abong'o --- Department of Chemistry, School of Physical Sciences, Kenya SO Wandiga --- Department of Chemistry, School of Physical Sciences, Kenya IO Jumba --- Department of Chemistry, School of Physical Sciences, Kenya PJ Van den Brink --- Aquatic Ecology and Water Quality Management Group, The Netherlands BB Naziriwo --- Department of Chemistry, Uganda VO Madadi --- Department of Chemistry, School of Physical Sciences, Kenya GA Wafula --- Department of Chemistry, School of Physical Sciences, Kenya P Nkedi-Kizza --- Soil and Water Science Department, USA H Kylin --- Department of Water and Environmental Studies, SwedenA baseline study was conducted of the occurrence of macroinvertebrates at 26 sites in the Nyando River catchment in 2005–2006. A total of 13 orders and 16 families of Arthropoda, Mollusca, Platyhelminthes and Annelida were collected, with the order Ephemeroptera... -
Aquatic invertebrate fauna of wells in a tropical mountain climate, western Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Nana Nkemegni --- Laboratoire de Biologie Générale, Faculté des Sciences, Université de Yaoundé 1, Cameroun SH Zébazé Togouet --- Laboratoire de Biologie Générale, Faculté des Sciences, Université de Yaoundé 1, Cameroun A Fomena --- Laboratoire de Biologie Générale, Faculté des Sciences, Université de Yaoundé 1, Cameroun OF Pountougnigni --- Laboratoire de Biologie Générale, Faculté des Sciences, Université de Yaoundé 1, Cameroun C Piscart --- UMR CNRS 6553 Ecosystèmes, Biodiversité, Evolution (ECOBIO), Université Rennes 1, FranceThe present study, conducted between May 2012 and September 2013, aimed to determine the distribution of groundwater invertebrates in the Bamoun tableland, Cameroon. A total of 216 samples taken from 30 wells in four localities – Foumban, Foumbot, Kouoptamo and... -
School adjustment of adolescents affected by HIV and AIDS: A case study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Olubusayo Aduke Asikhia --- Department of Psychology of Education, South Africa Kesh Mohangi --- Department of Psychology of Education, South AfricaThe study examined the school adjustment of South African adolescents affected by HIV and AIDS . Participants were a convenient sample of 60 adolescents from a secondary school in a major South African city (females = 73 .33%, 50% affected... -
Diversity and identification of fungi associated with needles of Pinus radiata in Tasmania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Istiana Prihatini --- Tasmanian Institute of Agriculture, Australia Morag Glen --- Tasmanian Institute of Agriculture, Australia Tim J Wardlaw --- Forestry Tasmania, Hobart, Australia Caroline L Mohammed --- Tasmanian Institute of Agriculture, AustraliaNeedle fungi have been extensively studied in conifers but rarely in Pinus radiata. Previous studies of P. radiata have been based on fungal isolation and not direct PCR detection from needles. This research was a component of a study examining... -
Person-environment fit, job satisfaction and intentions to leave: The moderating effect of leader empowering behaviour
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Kleinjan Redelinghuys --- Department of Industrial Psychology, Optentia Research Focus Area, South Africa Elrie Botha --- Department of Industrial Psychology, Optentia Research Focus Area, South AfricaThis study sought to determine the possible indirect effect of person-environment (PE) fit on intentions to leave via job satisfaction and the moderating effect of leader empowering behaviour on job satisfaction and intentions to leave the work organisation. Participants were... -
Thermal energy conservation strategy: A case of a modified local charcoal stove utilisation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Alex Okibe Edeoja --- Department of Mechanical Engineering, Nigeria Andrew C. Eloka-Eboka --- Discipline of Mechanical Engineering, South AfricaThe proliferation and use of charcoal stoves is on the increase even in urban locations in Africa despite the environmental hazard associated with charcoal production. The rising cost of fossil fuel, the smokeless nature of charcoal combustion and probably inexistent... -
Field evaluation of deficit irrigation effects on tomato growth performance, water-use efficiency and control of parasitic nematode infection
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Osama Mohawesh --- Department of Plant Production, JordanTwo field experiments were conducted using a common tomato cultivar (GS12) to assess the effect of deficit irrigation (DI) regimes on tomato growth performance, and on root-knot nematode Meloidogyne javanica galling and abundance. Irrigation treatments consisted of five irrigation regimes:... -
Sustainable hospitality and tourism at different ages: Women’s and men’s attitudes in Italy
Item type: Journal Article • Journal: • Authors: Alessandra Fermani --- Department of Education, Cultural Heritage and Tourism, University of Macerata, Luigi Bertelli Campus, Macerata, Italy Isabella Crespi --- Department of Education, Cultural Heritage and Tourism, University of Macerata, Luigi Bertelli Campus, Macerata, Italy Flavia Stara --- Department of Education, Cultural Heritage and Tourism, University of Macerata, Luigi Bertelli Campus, Macerata, ItalyFuture tourism experiences will be more oriented towards eco-friendly destinations and dictated by responsible lifestyles, as shown by the Travel Trends Report and UNWTO report. Many studies confirm that the number of travellers looking for accommodation that ensures greater respect... -
Food waste reduction at Restaurant De Pleats: Small steps for mankind
Item type: Journal Article • Journal: • Authors: Geesje Duursma --- Restaurant De Pleats, Burgum, The Netherlands Femke Vrenegoor --- Stenden Research Group Sustainability in Hospitality and Tourism, Stenden Hotel Management School, Leeuwarden, The Netherlands Sytze Kobus --- Restaurant De Pleats, Burgum, The NetherlandsEvery year, large quantities of food are thrown away in the catering industry. Restaurant De Pleats therefore started a pilot study for twelve days to weigh all discarded carrots, chips and bread in order to determine food waste within the... -
Relationships of alcohol intake with biological health outcomes in an African population in transition: the Transition and Health during Urbanisation in South Africa (THUSA) study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Re Gopane --- Department of Biological Sciences, South Africa Pt Pisa --- Centre of Excellence for Nutrition, South Africa Hh Vorster --- Centre of Excellence for Nutrition, South Africa A Kruger --- Centre of Excellence for Nutrition, South Africa Bm Margetts --- Institute of Human Nutrition, UKObjective: Because present recommendations on alcohol intake are based mainly on evidence of beneficial effects in populations of developed countries, this study examines biological effects of alcohol consumption in an African population in transition to assess whether these recommendations are... -
Iron status and cardiovascular disease risk in black South African women: the PURE study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Or Aderibigbe --- Centre of Excellence for Nutrition and Africa Unit for Transdisciplinary Health Research, Potchefstroom Pt Pisa --- Centre of Excellence for Nutrition and Africa Unit for Transdisciplinary Health Research, Potchefstroom Rl Mamabolo --- Centre of Excellence for Nutrition and Africa Unit for Transdisciplinary Health Research, Potchefstroom Hs Kruger --- Centre of Excellence for Nutrition and Africa Unit for Transdisciplinary Health Research, Potchefstroom Hh Vorster --- Centre of Excellence for Nutrition and Africa Unit for Transdisciplinary Health Research, Potchefstroom A. Kruger --- Africa Unit for Transdisciplinary Health Research, PotchefstroomObjective: To examine the associations between measures of iron status and cardiovascular disease (CVD) risk factors in South African women. -
Studies since 2005 on South African primary schoolchildren suggest lower anaemia prevalence in some regions
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: C Taljaard --- Centre of Excellence for Nutrition, Nm Covic --- Centre of Excellence for Nutrition, A Van Graan --- Centre of Excellence for Nutrition, Hs Kruger --- Centre of Excellence for Nutrition, Jc Jerling --- Centre of Excellence for Nutrition,The objective of this study was to report on the iron status of South African primary schoolchildren, as reported in independent studies conducted since the last National Food Consumption Survey-Fortification Baseline (NFCS-FB) in 2005. Internet searches were conducted for cross-sectional... -
Nutritional environment at secondary schools in Bloemfontein, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: L Meko --- Department of Nutrition and Dietetics, Faculty of Health Sciences, M Slabber-Stretch --- Department of Nutrition and Dietetics, Faculty of Health Sciences, C Walsh --- Department of Nutrition and Dietetics, Faculty of Health Sciences, S Kruger --- School of Physiology and Nutrition, M Nel --- Department of Biostatistics, Faculty of Health Sciences,Objective: The objective was to determine the nutritional environment at secondary schools in Bloemfontein, Free State province. -
The food environment of students on a financial assistance programme at the University of the Free State, Bloemfontein
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: NML Meko --- Faculty of Health Sciences, Department of Nutrition and Dietetics, South Africa EM Jordaan --- Faculty of Health Sciences, Department of Nutrition and Dietetics, South AfricaThe research study was undertaken to determine the food that students on the financial assistance program at the University of the Free State, Bloemfontein, could buy on campus. Students on this program can buy food from six food outlets on... -
Laboratory-scale evaluation of the potential of chemical containment for farmed abalone larval escapees
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Roux --- Department of Genetics, South Africa H Lambrechts --- Department of Animal Sciences, South Africa R Roodt-Wilding --- Department of Genetics, South AfricaThe sensitivity of abalone Haliotis midae larvae to low levels of toxicants was used to conduct a laboratoryscale experiment to determine the possibility of using chemical containment to prevent the escape of larvae from land-based culture systems, thereby reducing the... -
Environmental health factors associated with diarrhoeal diseases among under-five children in the Sebeta town of Ethiopia
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: AI Mohammed --- Medical and Health Services Department, Ethiopia Li Zungu --- Department of Health Studies, South AfricaThe aim of this study was to assess and explore household environmental health factors associated with the occurrence of diarrhoea experienced by children under five years of age in Sebeta town of Ethiopia. A cross-sectional study, using stratified random sampling... -
Colon cancer and the consumption of red and processed meat: an association that is medium, rare or well done?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: SM Kassier --- Dietetics and Human Nutrition, South AfricaIn 2015, the International Agency for Research on Cancer (IARC) indicated that red meat is a probable cause of colon cancer, while processed meat was classified as carcinogenic. The 2010 indicators of lifetime risk for developing colorectal cancer among South... -
Potential use of wood ash in South African forestry: a review
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Gerhardus P Scheepers --- Department of Forestry and Wood Science, South Africa Ben du Toit --- Department of Forestry and Wood Science, South AfricaThe use of landfills as a disposal method for wood ash is costly, environmentally detrimental and is pitted against increasingly stern environmental regulations. Literature has shown that wood ash has the potential to be used as a forest fertiliser and... -
A review of factors associated with indiscriminate dumping of waste in eleven African countries
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: I. Dladla --- Department of Environmental Health, South Africa F. Machete --- Department of Environmental Health, South Africa K. Shale --- Department of Environmental Health, South AfricaMost developing countries grapple with management of solid waste and environmental health risks associated with insanitary conditions. Indiscriminate dumping of household and industrial waste remains an alternative means of waste disposal for communities that have no access to reliable refuse... -
Sustainable hospitality and tourism at different ages: Women’s and men’s attitudes in Italy
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Alessandra Fermani --- Department of Education, Cultural Heritage and Tourism, Italy Isabella Crespi --- Department of Education, Cultural Heritage and Tourism, Italy Flavia Stara --- Department of Education, Cultural Heritage and Tourism, ItalyFuture tourism experiences will be more oriented towards eco-friendly destinations and dictated by responsible lifestyles, as shown by the Travel Trends Report and UNWTO report. Many studies confirm that the number of travellers looking for accommodation that ensures greater respect... -
Food waste reduction at Restaurant De Pleats: Small steps for mankind
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Geesje Duursma --- Restaurant De Pleats, The Netherlands Femke Vrenegoor --- Stenden Research Group Sustainability in Hospitality and Tourism, The Netherlands Sytze Kobus --- Restaurant De Pleats, The NetherlandsEvery year, large quantities of food are thrown away in the catering industry. Restaurant De Pleats therefore started a pilot study for twelve days to weigh all discarded carrots, chips and bread in order to determine food waste within the... -
Employees’ perspectives of service quality in hotels
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Mukhles M. Al-Ababneh --- Department of Hotel and Tourism Management, JordanAlthough the importance of service quality has been recognised, few studies have addressed service quality in hotels from the perspective of employees. Therefore, this study aims to measure the service quality of four and five-star hotels in Jordan from the... -
Nitrogen leakages and vegetable dry matter yield in a subtropical wetland soil amended with cattle manure and mineral nitrogen fertiliser
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johnson Masaka --- Department of Land and Water Resources Management, Faculty of Natural Resources Management and Agriculture, Zimbabwe Eliton Chivandi --- School of Physiology, Faculty of Health Sciences, South AfricaThe response of nitrous oxide emission and nitrate leaching to increased nitrogen (N) fertiliser and cattle manure applications to wetland vegetable cropping in subtropical Africa have significant impacts on the atmospheric and terrestrial environments. Two field experiments were carried out... -
School tuck shops in South Africa—an ethical appraisal
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Nico Nortje --- Department of Psychology, South Africa Mieke Faber --- Department of Dietetics, South Africa Anniza de Villiers --- Non-Communicable Diseases Research Unit, South AfricaIt can be postulated that schools have an ethical responsibility to protect children from an unhealthy food environment. Against the backdrop of stunting, overweight and micronutrient deficiencies prevalent in South African children, the aim of this scoping study is to... -
The severity and optimal management of iron deficiency and anaemia before radiation for cervical cancer at the University of Pretoria Academic Hospitals
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Greta Dreyer --- Gynaecological Oncology Unit, Department of Obstetrics and Gynaecology, South Africa Anna E. Mostert --- Department of Obstetrics and Gynaecology, South Africa Cathy Visser --- Gynaecological Oncology Unit, Department of Obstetrics and Gynaecology, South Africa Arnold Mouton --- Gynaecological Oncology Unit, Department of Obstetrics and Gynaecology, South AfricaBackground: In patients with locally advanced cervical cancer who receive radiotherapy, outcomes correlate significantly with haemoglobin level before and during therapy. These patients often have severe anaemia and require repeated transfusions to achieve and maintain optimal haemoglobin levels. -
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... -
Sustainable agriculture practices and livelihoods in pro-poor smallholder farming systems in southern Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Clifton Makate --- International Centre for Tropical Agriculture (CIAT), Zimbabwe Marshall Makate --- Department of Economics, USA Nelson Mango --- International Centre for Tropical Agriculture, UgandaClimate variability and change threaten and impact negatively on biodiversity, agricultural sustainability, ecosystems, and economic and social structures – factors that are all vital for human resilience and wellbeing. To cope with these challenges, embracing sustainability in food production is... -
Outward foreign direct investment from South Africa’s energy sector and the transfer of environmentally sound technologies to Uganda’s energy sector
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Albert Edgar Manyuchi --- Department of Political Sciences, South AfricaFollowing the end of apartheid in 1994, outward foreign direct investment (OFDI) from South Africa has been on the increase. However, the content of South African OFDI has remained an understudied topic. This article explores whether intra-regional flows of FDI... -
Ghost crab burrow density at Watamu Marine National Park: An indicator of the impact of urbanisation and associated disturbance?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HFR Hereward --- School of Animal, Rural and Environmental Sciences, UK LK Gentle --- School of Animal, Rural and Environmental Sciences, UK ND Ray --- School of Animal, Rural and Environmental Sciences, UK RD Sluka --- A Rocha Kenya, KenyaGhost crab (Ocypode species) burrow densities have previously been used as an indicator of anthropogenic impact. This study aimed to assess the burrow density of Ocypode species (O. ryderi and O. cordimanus) at four sites across Watamu Marine National Park,... -
The effect of technological innovation on production-based energy and CO2 emission productivity: Evidence from BRICS countries
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Swarup Santra --- The Department of Economics, Satyawati College, IndiaCollectively, Brazil, the Russian Federation, India, China and South Africa (known as BRICS) are emerging as an economic superpower. In 2014, BRICS countries accounted for approximately 40% of the total world population, 30% of the total earth surface and almost... -
The contribution of creative industries to sustainable urban development in South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Oluwayemisi Adebola Oyekunle --- Tshwane University of Technology, Faculty of The Arts, South AfricaSouth African policymakers are increasingly advocating for creative industry entrepreneurship to play a vital role in the economic development of cities, for example, by creating pathways for job creation and encouraging urban regeneration. The question, ‘How can we use creative... -
Spatial variability of selected soil micronutrients under smallholder crop production in Zanyokwe, Eastern Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Alen Manyevere --- Department of Agronomy, South Africa Pardon Muchaonyerwa --- Discipline of Soil Science, School of Agriculture, Earth and Environmental Sciences, South Africa Pearson NS Mnkeni --- Department of Agronomy, South Africa Inos Dhau --- Department of Geography and Environmental Sciences, South AfricaUnderstanding spatial variability of soil nutrients, including that of micronutrients, is important for establishing best management practices in smallholder crop production. The objective of this study was to determine the status and spatial variability of potentially available zinc (Zn), copper... -
Phytoplankton primary productivity seasonality and changes in a small African lake, Lake Hora-Kilole, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Abate --- Aquatic Sciences, Fisheries and Aquaculture Stream, Department of Zoological Sciences, China D Kifle --- Aquatic Sciences, Fisheries and Aquaculture Stream, Department of Zoological Sciences, Ethiopia YH Gao --- School of Life Sciences and State Key Laboratory of Marine Environmental Science, ChinaThe seasonality of primary productivity by phytoplankton in relation to physico-chemical and biological variables was studied in Lake Hora-Kilole from August 2007 to May 2008. In 1989, the Mojo River was temporarily diverted to flow into the lake, which substantially... -
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... -
Interventions and pathways for South African women in engineering and the built environment professions
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Christianah O. Ijagbemi --- Department of Industrial Engineering, South Africa Mukondeleli G. Kanakana --- Department of Industrial Engineering, South Africa Harold M. Campbell --- Department of Industrial Engineering, South AfricaWomen engineers are known to be very resourceful, result-oriented, committed and hardworking. The low participation of women in engineering and the built environment professions has been taking its toll on the economic and infrastructural development of South Africa. The practice... -
Environmental health risks associated with e-waste exposure in Badplaas, Carolina and Elukwatini landfills, Republic of South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Fannie Machete --- Department of Environmental Science, South AfricaA recent study identified a mixed stream of waste in Badplaas, Carolina and Elukwatini landfills. However, the risks associated with the situation in the three selected towns remains unknown. Thus, this paper fills this gap of qualitatively assessing the potential... -
The scale effect of economic development and freshwater quality in Nigeria: Environmental pollution of the Lower River Niger Basin
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chigozie Damian Ezeonyejiaku --- Department of Zoology, Nigeria Maximilian Obinna Obiakor --- School of Environmental and Rural Science, Australia Dymphna Javier --- School of Environmental and Rural Science, Australia Ikem Innocent Ifedigbo --- Department of Zoology, Nigeria Hamilton Chukwuebuka Obiakor --- Department of Public Administration, NigeriaRiver Niger is the third-longest river in Africa and the longest river in West Africa. The river basin traverses West and Central African countries, and forms a coastal delta (in southern Nigeria) where it empties into the Atlantic Ocean. The... -
Role of reciprocity and innovativeness on performance in a developing context: Empirical evidence from Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Shogo Mlozi --- Department of Tourism, Tanzania Ossi Pesämaa --- Accounting and Control, Sweden Sarah Jack --- Department of Entrepreneurship, Strategy and Innovation, UKGenerally, investors tend to invest when likelihood of success is high. Many investors consider Africa as one market and neglect individual differences among African countries. Africa is mostly considered a high-risk market and conceptually innovativeness involves uncertainty, which precedes risk... -
Classification of marine bioregions on the east coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T-C Livingstone --- Ezemvelo KZN Wildlife, South Africa JM Harris --- Ezemvelo KZN Wildlife, South Africa AT Lombard --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa AJ Smit --- Department of Biodiversity and Conservation Biology, South Africa DS Schoeman --- School of Science and Engineering, AustraliaMarine bioregional planning requires a meaningful classification and spatial delineation of the ocean environment using biological and physical characteristics. The relative inaccessibility of much of the ocean and the paucity of directly measured data spanning entire planning regions mean that... -
Biometric variations and oxidative stress responses in juvenile Clarias gariepinus exposed to Termex®
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JU Nnadi --- Department of Zoology and Environmental Biology, Nigeria IN Dimelu --- Department of Home Economics and Hospitality Management Education, Nigeria SI Nwani --- Department of Agriculture Education, Nigeria JC Madu --- Department of Zoology and Environmental Biology, Nigeria CI Atama --- Department of Zoology and Environmental Biology, Nigeria GN Attamah --- Department of Zoology and Environmental Biology, Nigeria JI Okwor --- Department of Zoology and Environmental Biology, Nigeria CD Nwani --- Department of Zoology and Environmental Biology, NigeriaThe current study investigated the effects of termite insecticide, Termex® (imidacloprid 35.50% SC), on biometric variations and oxidative stress biomarkers in Clarias gariepinus. Fish were exposed to 4.00 and 6.00 µg l–1 sublethal Termex® concentrations in 2017. The gill and... -
Genetic variability of growth and wood chemical properties in a clonal population of Eucalyptus urophylla × Eucalyptus grandis in the Congo
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Garel Makouanzi --- Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles (CRDPI), Republic of the Congo Gilles Chaix --- CIRAD, France Sophie Nourissier --- CIRAD, France Philippe Vigneron --- Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles (CRDPI), Republic of the CongoThirty-four Eucalyptus urophylla × Eucalyptus grandis hybrids were evaluated with a view to selecting for improved growth and wood-quality traits for plantations in the Congo. Height, circumference at breast height and volume were measured at 12, 27, 37, 49 and... -
Can the presence of curved forms of the diatom Aulacoseira ambigua in the Nile (Egypt) and Vaal (South Africa) Rivers be ascribed to similar water quality conditions?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Janse van Vuuren --- Unit for Environmental Sciences and Management, South Africa AA Saber --- Botany Department, Faculty of Science, Egypt A Swanepoel --- Rand Water, Scientific Services, South Africa M Cantonati --- MUSE-Museo delle Scienze, Limnology and Phycology Section, ItalySpiral colonies of the diatom Aulacoseira ambigua were assigned the rank of forma (Aulacoseira ambigua f. japonica). This spiral-shaped, colonial, centric diatom has limited geographical distribution and is currently reported to occur in only a few countries in the world... -
Biodiversity and ecology of epilithic diatoms in the Agnéby River, Ivory Coast
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: KR N’Guessan --- Laboratoire d’Hydrobiologie et d’Éco-technologie des Eaux-U.F.R, Côte d’Ivoire BRD Aboua --- Laboratoire d’Hydrobiologie et d’Éco-technologie des Eaux-U.F.R, Côte d’Ivoire J Tison-Rosebery --- Irstea-ur eabx, France A Ouattara --- Laboratoire d’Environnement et de Biologie Aquatique, UFR-Sciences et Gestion de l’Environnement, Côte d’Ivoire EP Kouamelan --- Laboratoire d’Hydrobiologie et d’Éco-technologie des Eaux-U.F.R, Côte d’IvoireThe ecology and taxonomy of the epilithic diatom flora of the Agnéby River, Ivory Coast were studied in 2012. Ten sites were investigated and diatoms were sampled on glass slides immersed for a period of 30 days during the wet... -
Occurrence and distribution of organochlorine pesticide residue levels in water, sediment and aquatic weeds in the Nyando River catchment, Lake Victoria, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DA Abong’o --- College of Biological and Physical Sciences, School of Physical Science, Department of Chemistry, Kenya SO Wandiga --- College of Biological and Physical Sciences, School of Physical Science, Department of Chemistry, Kenya IO Jumba --- College of Biological and Physical Sciences, School of Physical Science, Department of Chemistry, KenyaSamples of water, sediments and aquatic weeds were collected from 26 sites in the Nyando River catchment of the Lake Victoria basin in 2005–2006. The objective was to investigate levels of organochlorine pesticides that have either been banned or are... -
Spodosols in Brazil: distribution, characteristics and diagnostic attributes of spodic horizons
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Andressa R de Menezes --- Agronomy Institute, Department of Soil Science, Brazil Ademir Fontana --- Embrapa Solos, Brazil Lúcia HC dos Anjos --- Agronomy Institute, Department of Soil Science, BrazilSpodosols are reported in specific environments of Brazil, such as sandy materials in the Amazon and Pantanal basin, sandbanks in the coastal fringes and coastal tableland areas, and a few in high-altitude mountains with quartz-rich rocky substrates. This study describes... -
Environmental responses of jellyfish polyps as drivers of medusa populations off the coast of Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Ziegler --- Department of Biodiversity and Conservation Biology, South Africa MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaJellyfish populations in the southeastern Atlantic off the coast of Namibia have increased subsequent to the decline of small pelagic fisheries at the end of the 1960s, although the environment there has also become warmer and the waters off Walvis... -
Building low-carbon energy innovation systems in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Radhika Perrot --- Independent researcher, South Africa Maruf Sanni --- National Centre for Technology Management, NigeriaThe objective of this special issue is to bring together research on low-carbon innovation in the African context. The aim is to assess and compare various cases of low-carbon energy development in Africa in an effort to understand the underlying... -
An overview of themes in the agrarian and environmental history of the Karoo since c.1800
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: William Beinart --- African Studies Centre, UKThis article explores some themes in the agrarian and environmental history of the Karoo since 1800. It argues that environmental change cannot be understood without incorporating social, economic and political history. This is especially so in the case of the... -
Reflections, applications and future directions of Long-Term Ecological Research at Tierberg
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Gina Arena --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Helga van der Merwe --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Simon W Todd --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Marco J Pauw --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Suzanne J Milton --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa W Richard J Dean --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Joh R Henschel --- South African Environmental Observation Network (SAEON): Arid Lands Node, South AfricaTierberg-LTER is a research site established in 1987 in the semi-arid Succulent Karoo near Prince Albert in the Western Cape province, South Africa. The original purpose for its establishment was to study ecosystem dynamics and the drivers of vegetation in... -
The composition of the soil seedbank and its role in ecosystem dynamics and rehabilitation potential in the arid Tankwa Karoo Region, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Manam WB Saaed --- Higher Institute of Agricultural Techniques, Libya Shayne M Jacobs --- Department of Conservation Ecology and Entomology, South Africa Mmoto L Masubelele --- Cape Research Centre, South Africa Igshaan Samuels --- Agricultural Research Council–Animal Production, c/o Department of Biodiversity and Conservation Biology, South Africa Lesego Khomo --- Department of Environmental Sciences, South Africa Yacoub M El-Barasi --- Botany Department, Faculty of Science, LibyaVery few soil seedbank studies have been conducted in South Africa, especially in arid rangelands. Insight into the soil seedbank could therefore improve assessment of rangeland dynamics and enhance rehabilitation efforts. This study aimed to characterise the soil seedbanks in... -
Physico-chemical water quality characteristics of upper Ebonyi River, Enugu State, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NO Nweze --- Department of Plant Science and Biotechnology, Nigeria EC Eze --- Department of Plant Science and Biotechnology, NigeriaThe physico-chemical characteristics of upper Ebonyi River, Nigeria were assessed at four locations, from September 2014 to December 2014, using standard methods, thereby providing information for documentation and the determination of pollution status in comparison with World Health Standards. Parameters,... -
Expatriates’ success in Ethiopia: Empirical evidence on the overlooked impact of cultural value alignment
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Wondwossen Kassa Tsegaye --- School of Management, China Qin Su --- School of Management, China Zhi Ouyang --- School of Management, ChinaThe present study assessed the impact on the work engagement of expatriates’ personal value orientation alignment with the host country’s national culture. Participants were 231 expatriates from seven countries who are working in Ethiopia (females = 17%; mean age =... -
Sustainable development practices for the hotel industry in Nigeria: Implications for the Ilaro area of Ogun State
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Edwin Chigozie Nwokorie --- Department of Hospitality Management, Nigeria Judipat Nkiru Obiora --- Department of Hospitality Management & Tourism, NigeriaSustainable development practices of 15 hotels were investigated in this study in which a 41 point questionnaire, prepared in 10 sub-scales, was administered to 350 respondents selected from employees of the hotels and residents of the host community to ascertain... -
Investigating the factors for achieving and encouraging environmental certification: Driving and restraining forces
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Stephanie M. E. Ching --- Stenden Hotel Management School, The Netherlands Elena Cavagnaro --- Stenden Hotel Management School, The NetherlandsEnvironmental sustainability has increasingly become a priority for organisations. However, the public and academic attention is generally on large companies, while small and medium enterprises constitute the bulk of organisations and are arguably lagging behind. Fewer than ten per cent... -
Variations in heavy metal concentrations among trophic levels of the food webs in two agroecosystems
Item type: Journal Article • Journal: African Zoology • Authors: Mustafa Soliman --- Entomology Department, Egypt Mohamed El-Shazly --- Entomology Department, Egypt Emtithal Abd-El-Samie --- Entomology Department, Egypt Hamed Fayed --- Zoology Department, EgyptExcessive accumulation of trace metal in soil represents a growing environmental problem posing severe risks to biota, humans and ecosystems. Concentrations of Cd, Pb, Cu and Zn were determined in soil, as well as in representatives of some trophic levels... -
Conservation buffer sizes derived from movement data of adult Cape vultures (Gyps coprotheres) in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Jan A Venter --- School of Natural Resource Management, South Africa Francis R Martens --- School of Natural Resource Management, South Africa Kerri Wolter --- VulPro, South AfricaThe endangered Cape vulture (Gyps coprotheres) is facing a new emerging threat, e.g. wind energy development. Given their vulnerability to wind energy infrastructure, there is a necessity to establish proactive measures that could potentially mitigate future collisions, such as conservation... -
Feasibility of HIV self-testing: experiences of people seeking HIV testing in rural and urban KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Charlene Harichund --- Centre for the AIDS Programme of Research in South Africa, South Africa Pinky Kunene --- Centre for the AIDS Programme of Research in South Africa, South Africa Mosa Moshabela --- School of Nursing and Public Health, South AfricaHIV status awareness is a rate limiting step in HIV treatment and prevention initiatives aimed at addressing the global HIV epidemic. Uptake of HIV testing remains suboptimal despite global campaigns aimed at improving uptake. HIV self-testing (HIVST) displays the potential... -
Environmental benefits of corn cob ash in lateritic soil cement stabilization for road works
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olanrewaju A. Apampa --- Department of Civil Engineering, NigeriaThe potential environmental benefits of corn cob ash (CCA) as pozzolan in stabilizing soils for road construction was investigated. Corn cob obtained from Maya in South West Nigeria was processed to ash similar to Class C Fly Ash and blended... -
Comparative depth estimation of iron-ore deposit using the Data-Coordinate Interpolation Technique for airborne and ground magnetic survey variation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: James Adeyemo Adegoke --- Department of Physics, Nigeria Gideon Oluyinka Layade --- Department of Physics, NigeriaA newly developed quantitative method, Data-Coordinate Interpolation Technique (DCIT) was used by matching the secondary and primary data to correct the variation that exists between airborne and ground magnetic depth-to-basement. The aeromagnetic data within latitude (8.000N, 8.500N) and longitude (4.000E,... -
Optimising the learning environment for undergraduate students in the Department of Family Medicine at Sefako Makgatho Health Sciences University
Item type: Journal Article • Journal: South African Family Practice • Authors: I Govender --- Centre for Health Professions Education, South Africa M De Villiers --- Centre for Health Professions Education, South AfricaBackground: An important determinant of a medical student's behaviour and performance is the department's teaching and learning environment. Evaluation of such an environment can explore methods to improve educational curricula and optimise the academic learning environment. -
Adherence to iron prophylactic therapy during pregnancy in an urban regional hospital in South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Princess Z Mkhize --- Women’s Health and HIV Research Group, Department of Obstetrics and Gynaecology, T Naicker --- Optics and Imaging Centre, South Africa OA Onyangunga --- Optics and Imaging Centre, South Africa J Moodley --- Women’s Health and HIV Research Group, Department of Obstetrics and Gynaecology,Background: Iron and folic acid supplementation plays a major role in the prevention and control of iron-deficiency anaemia in pregnancy. Therefore, this study assesses adherence to prophylactic iron supplementation during the antenatal period in South Africa. -
Factors that influence firewood use among electrified Bapedi households of Senwabarwana Villages, South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Khomotso Semenya --- College of Agriculture and Environmental Sciences, Republic of South Africa Fannie Machete --- College of Agriculture and Environmental Sciences, Republic of South AfricaThis paper presents the factors that influence firewood use among electrified Bapedi households in Senwabarwana Villages. The study follows explanatory and exploratory methods of data analysis, through survey (structured interviews) and meta-analysis. In-depth content analysis was followed to establish trends... -
Genotype-by-environment interaction and yield stability of sunflower hybrids across production environments in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Safiah Ma’ali --- Agricultural Research Council–Grain Crops, South Africa William Makgoga --- Agricultural Research Council–Grain Crops, South Africa Jan Erasmus --- Agricultural Research Council–Grain Crops, South Africa Sophie Swanepoel --- Agricultural Research Council–Grain Crops, South AfricaGenotype-by-environment interaction (GEI) is typical in multi-environment trials, which complicates the identification of superior genotypes, making selection and recommendation of new sunflower genotypes for different environments challenging and expensive. The objectives of this study were to investigate the GEI, identify... -
Genotype-by-environment interaction of grain yield among candidate dryland wheat genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Miriam Matlala --- African Centre for Crop Improvement, South Africa Hussein Shimelis --- African Centre for Crop Improvement, South Africa Jacob Mashilo --- African Centre for Crop Improvement, South AfricaGenotype-by-environment interaction (GEI) analysis is an essential step to identify superior and stable yielding genotypes and suitable test environments for cultivar development. The objective of the present study was to examine GEI of grain yield among candidate dryland wheat genotypes... -
Localised intermittent upwelling intensity has increased along South Africa’s south coast due to El Niño–Southern Oscillation phase state
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MI Duncan --- Department of Ichthyology and Fisheries Science, South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa AE Bates --- Department of Ocean Sciences, Canada WS Goschen --- Institute for Coastal and Marine Research, Ocean Sciences Campus, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe El Niño–Southern Oscillation (ENSO) phase state is reported to drive interannual variability in sea temperatures along South Africa’s south coast through its influence on wind-induced upwelling processes. Whether ENSO drives the intensity of localised, abrupt, intermittent upwelling is less... -
Changes in decomposition rate and litterfall in riparian zones with different basal area of exotic Eucalyptus in south-eastern Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Glaucia Regina Santos --- Department of Forest Science, Brazil Marina Shinkai Gentil Otto --- Department of Forest Science, Brazil José Raimundo de Souza Passos --- Department of Biostatistics, Brazil Felipe Ferreira Onofre --- Department of Forest Science, Brazil Valdemir Antônio Rodrigues --- Department of Forest Science, Brazil Felipe Rossetti de Paula --- Department of Forest Science, Brazil Silvio Frosini de Barros Ferraz --- Department of Forest Science, BrazilExotic species in riparian environments can influence the quantity and quality of litterfall in the ecological system. The objective of this study was to evaluate the influence of Eucalyptus leaves on litterfall and terrestrial and aquatic leaf decomposition in a... -
The influence of institutional isomorphism and organisational factors on environmental management accounting practices of listed Nigerian and South African firms
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Oluwamayowa O. Iredele --- , South Africa Moloi Tankiso --- , South Africa Michael O. Adelowotan --- , South AfricaThe rising profile of environmental issues, most of which relates to continuous consumption of materials, energy and water by companies, and the continuous accumulation of environmental-related costs, necessitates the need for environmental management accounting (EMA). EMA is regarded as an... -
Oxygen and temperature influence the distribution of deepwater Cape hake Merluccius paradoxus in the southern Benguela: a GAM analysis of a 10-year time-series
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: FL Mbatha --- Department of Biological Sciences and Marine Research Institute, South Africa D Yemane --- Department of Biological Sciences and Marine Research Institute, South Africa M Ostrowski --- Institute of Marine Research (IMR), Norway CL Moloney --- Department of Biological Sciences and Marine Research Institute, South Africa MR Lipiński --- Department of Ichthyology and Fisheries Science, South AfricaGeneralised additive models (GAMs) were applied to survey data to assess the influence of dissolved oxygen, water temperature and year of sampling upon the presence/absence of small (≤15 cm TL), medium (16–34 cm TL) and large (≥35 cm TL) size... -
A brief review of the legal protection of vultures in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Lindy J Thompson --- Birds of Prey Programme, Endangered Wildlife Trust, South Africa Andrew C Blackmore --- Ezemvelo KwaZulu-Natal Wildlife, South AfricaVulture numbers are globally in a decline and many species are considered as either endangered or critically endangered. The same applies to vultures in South Africa, raising concerns about the long-term persistence of these ecologically important birds in this country... -
Suicide attempt and associated factors among in-school adolescents in Mozambique
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- ASEAN Institute for Health Development, Mahidol University, Thailand Karl Peltzer --- Department for Management of Science and Technology Development, VietnamThe study estimated the prevalence and correlates of suicide attempts in the past year in adolescents in Mozambique. We utilised a cross-sectional national secondary data set (N = 1 918; median age 15 years, interquartile range =3 years) from the... -
Use of openly available occurrence data to generate biodiversity maps within the South African EEZ
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Yemane --- Department of Environment, Forestry and Fisheries (DEFF), South Africa SP Kirkman --- Department of Environment, Forestry and Fisheries (DEFF), South Africa T Samaai --- Department of Environment, Forestry and Fisheries (DEFF), South AfricaBiodiversity maps are an important component of ecosystem-based management and conservation. In the past, biodiversity maps were largely generated using patchy occurrence data from a range of data sources. Currently, substantial species occurrence data are readily available for large parts... -
Optimising the number of test sites, crop-years and replications to maximize post-release testing efficiencies
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sbongeleni Warren Duma --- School of Agricultural, Earth and Environmental Sciences, South Africa Hussein Shimelis --- School of Agricultural, Earth and Environmental Sciences, South Africa Sanesh Ramburan --- School of Agricultural, Earth and Environmental Sciences, South Africa Admire Isaac Tichafa Shayanowako --- School of Agricultural, Earth and Environmental Sciences, South AfricaThe South African sugar industry develops commercial sugarcane cultivars across multiple testing sites, crop-years and replications. The extent of such parameters has not been well quantified for optimum breeding and resource allocation. The objective of this study was to identify... -
Management of school nutrition programmes to improve environmental justice in schools: a South African case study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Ailwei Mawela --- Department of Curriculum and Instructional Studies, College of Education, South Africa Geesje van den Berg --- Department of Curriculum and Instructional Studies, College of Education, South AfricaObjective: The objective of this study was to determine how school principals and nutrition coordinators see their roles in the management of school nutrition programmes for learners from disadvantaged communities. -
Obesity is associated with anaemia and iron deficiency indicators among women in the rural Free State, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: EM Jordaan --- , South Africa VL Van den Berg --- , South Africa FC Van Rooyen --- , South Africa CM Walsh --- , South Africa -
A comparative assessment of the contribution of two different models for clearing invasive alien plants using grazing regimes in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T Morokong --- , South Africa JN Blignaut --- , South AfricaInvasive alien plants (IAPs) compromise the productive capability of a land parcel from both an economic and a biodiversity perspective. Given the magnitude of degradation and the benefits of landscape-scale restoration, a unified approach among stakeholders is required to upscale... -
Threats posed by xenoestrogenic chemicals to the aquatic ecosystem, fish reproduction and humans: a review
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: I Badamasi --- , Uganda R Odong --- , Uganda C Masembe --- , UgandaXenoestrogens mimic and interfere with natural functions of oestrogens and adversely affect fish reproduction. Pesticides, plastics, wastewaters and pharmaceuticals are sources of xenoestrogens, and are carried through surface runoffs to water bodies at concentration levels that are harmful to aquatic... -
Annual litter production in a Brazilian Cerrado woodland savanna
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Alan N Costa --- , Brazil Alessandra Bartimachi --- , Brazil Heraldo L Vasconcelos --- , USA Emilio M Bruna --- , USA Ernane HM Vieira-Neto --- , USAThe Brazilian Cerrado is a heterogeneous ecosystem where annual woody-layer litter production shows strong spatiotemporal variation. Although Cerrado litter dynamics have been well-documented in forest physiognomies, knowledge from savanna habitats remains limited despite their predominance across the landscape. In this... -
Tourism resources and carrying capacity of scenic tourism areas based on forest ecological environment
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Qiong Sun --- , China Naicong Zhang --- , China Zheng Liu --- , China Bin Liao --- , ChinaThe development of society promotes the development of forest scenic tourism areas. In order to further realise the scientific and rational development of forest scenic tourism areas, it is necessary to analyse their tourism resources and carrying capacity. This paper... -
Spatio-temporal distribution of organochlorine pesticide residues in water and sediments of tropical reservoirs: a case study of Bui Reservoir, Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SB Jidauna --- , Ghana R Edziyie --- , Ghana BB Campion --- , GhanaThis study investigated the spatio-temporal distribution of organochlorine pesticides (OCPs) in water and sediments of the Bui Reservoir from June 2017 to May 2018, to provide baseline data for monitoring contamination in the Reservoir. Samples were collected during four seasons... -
Eco-friendly environment in Cameroon: Does an increase in fossil fuel energy consumption influence economic growth?
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Thales Pacific Yapatake Kossele --- , Central African Republic Manuella Ndjakwa Tonga --- , Cameroon Magalie Gabriella Ngaba Mbai-Akem --- , Central African RepublicThis study examines the relationship between fossil fuel consumption and economic growth in ensuring energy conservation steps to reduce reliance on fossil fuels for a friendly environment in Cameroon covering the period of 1996–2013. The Auto-Regressive Distributed Lag (ARDL) bounds... -
Gonadal development and intersex condition of marbled lungfish, Protopterus aethiopicus (Heckel, 1851), in contaminated sites in Lake Victoria, Uganda
Item type: Journal Article • Journal: African Zoology • Authors: Inuwa Badamasi --- , Uganda Robinson Odong --- , Uganda Charles Masembe --- , UgandaThe first evidence of the impact of environmental contamination on populations of Protopterus aethiopicus (Heckel, 1851) in terms of body indices, cellular development (histology) and intersex condition in Lake Victoria, Uganda is provided. Specimens were obtained from the more polluted... -
Teratological cases of the ocular patterns in the South African endemic trapdoor spider genus Stasimopus Simon (1892) (Araneae, Mygalomorphae, Stasimopidae)
Item type: Journal Article • Journal: African Zoology • Authors: Shannon Mitchell --- , South Africa Catherine Sole --- , South Africa Robin Lyle --- , South AfricaTeratology is the science that deals with the causes and patterns of deformities, abnormalities and defects in the physical development of animals. Teratological occurrences can be due to genetic or environmental conditions. Ocular teratologies are common in hypogean spiders. This... -
Disease driven extinction in the wild of the Kihansi spray toad, Nectophrynoides asperginis
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Ché Weldon --- Unit for Environmental Sciences and Management, North-West University, South Africa Alan Channing --- Unit for Environmental Sciences and Management, North-West University, South Africa Gerald Misinzo --- SACIDS Africa Centre of Excellence for Infectious Diseases of Humans and Animals in Eastern and Southern Africa, Sokoine University of Agriculture, Tanzania Andrew A Cunningham --- Institute of Zoology, Zoological Society of London, United KingdomThe Kihansi spray toad, Nectophrynoides asperginis, became extinct in the wild despite population monitoring and conservation management of its habitat in the Kihansi gorge, Tanzania. Previous investigations have indicated human induced habitat modification, predators, pesticides and disease as possible causes... -
Fire and rust – the impact of Austropuccinia psidii (myrtle rust) on regeneration of Myrtaceae in coastal heath following wildfire
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: GS Pegg --- , Australia P Entwistle --- , Australia FR Giblin --- , Australia AJ Carnegie --- , AustraliaIn April 2010, the exotic rust fungus Austropuccinia psidii was detected for the first time in Australia, with the host range rapidly increasing to >350 species from 58 genera within the family Myrtaceae. Commonly known as myrtle rust, the disease... -
The new soil classification system in South Africa, its history, important changes made and implications for users
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: George van Zijl --- , South Africa Dave Turner --- , South Africa Garry Paterson --- , South Africa Jaco Koch --- , South Africa Johan van Tol --- , South Africa Kurt Barichievy --- , South Africa Cathy Clarke --- , South Africa Martiens du Plessis --- , South Africa Piet van Deventer --- ,The board of the Soil Science Society of South Africa endorsed the “Soil Classification: A Natural and Anthropogenic System for South Africa”, in 2020 making it the official soil classification system to be used in South Africa. This classification system,... -
Environmental health risks associated with indiscriminate dumping in Lekwa Local Municipality
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Isaiah Dladla --- , South Africa Machete Machete --- , South Africa Karabo Shale --- , South AfricaThis paper presents the environmental health risks associated with indiscriminate dumping of solid waste in Lekwa Local Municipality. Structured observations were used to collect data from the identified waste dumping spots. The primary data collected involved the characterization of waste... -
Mobilisation and dynamics of energy reserves in different tissues of Donax trunculus (Bivalvia: Donacidae) in the Gulf of Tunis (eastern Mediterranean Sea, Tunisia)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Boussoufa --- , Tunisia H Chalouati --- , Tunisia N Ghazali --- , Tunisia JC Navarro --- , Spain M El Cafsi --- , TunisiaSeasonal changes in condition index and the biochemical components (proteins, lipids and glycogen) of the gonad/digestive gland, foot, labial palp, mantle, gills and adductor muscles of Donax trunculus Linnaeus, 1758 from the Gulf of Tunis were monitored seasonally, from November... -
Population ecology of Red-necked Spurfowl Pternistis afer in the coastal towns of the Eastern Cape province, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Johann H van Niekerk --- , South AfricaConserved remnants of indigenous vegetation patches and corridors are regarded as important components of the built environment for the survival of birds. Field research was conducted at Boknes and Cannon Rocks in the Eastern Cape Province, South Africa to study... -
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... -
Traditional green leafy vegetables as underutilised sources of micronutrients in a rural farming community in south-west Nigeria I: estimation of vitamin C, carotenoids and mineral contents
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Shirley Isibhakhomen Ejoh --- , France Faustina Dufie Wireko-Manu --- , France David Page --- , France Catherine MGC Renard --- , FranceObjective: To determine the micronutrient composition of fresh and boiled traditional green leafy vegetables (TGLVs). -
Distribution patterns of intertidal oribatid mites (Acari, Oribatida) from South African shores and their relationship to temperature
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Pfingstl --- , Austria J Baumann --- , Austria J-A Neethling --- , South Africa I Bardel-Kahr --- , Austria EA Hugo-Coetzee --- , South AfricaA faunistic study of the intertidal oribatid mite fauna of South Africa’s coastline revealed the presence of four species from three families, showing specific biogeographic patterns. Their occurrences show a clear east–west divide, with a small gap near East London... -
Microplastics pollution in the sediments of creeks and estuaries of Kenya, western Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JO Kerubo --- , Kenya AWN Muthumbi --- , Kenya JM Onyari --- , Kenya D Robertson-Andersson --- , South Africa E Kimani --- , KenyaMicroplastic pollution has been recognised as a global threat in marine environments and a danger to prey, predators and humans. Yet, there have been few studies in the western Indian Ocean, specifically along the Kenyan coast, which makes it difficult... -
The impact of rubber effluent discharges on the water quality of a tropical rain forest river in Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MO Omoigberale --- , Nigeria IM Ezenwa --- , Nigeria E Biose --- , Nigeria C Okoye --- , NigeriaThe impact of a rubber effluent on the water quality of Oken River, Nigeria, was assessed. Surface water was analysed for water quality parameters at four sites; one upstream and three downstream. Significantly raised (p ≤ 0.05) levels of electrical... -
Comparative biotolerance of water spinach, Ipomoea aquatica, to heavy metal pollution in the Agodi Reservoir and the Ogunpa River, Oyo State, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PO Ogungbile --- , Nigeria PO Ayeku --- , Nigeria AO Ajibare --- , NigeriaThe biotolerance of water spinach (Ipomoea aquatica) to heavy metals was investigated in the Agodi Reservoir and its supplying source, the Ogunpa River, to examine the impact of aquatic pollution. I. aquatica was collected monthly from the Ogunpa River and... -
Sustainable person-environment fit and subjective career success: The moderating role of resilience
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Zilmarie Carstens --- , South Africa Eileen Koekemoer --- , South Africa Andries Masenge --- , South AfricaThis study examined the relationship between person-environment fit and subjective career success (SCS), as well as the role of personal resilience in that relationship. A convenience sample of 742 employees from various sectors in South Africa (female = 55.3%; Afrikaans... -
Coalescing intellectual property incentives, gender inclusiveness and environmental sustainability for female traditional healers in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ofonmbuk Esther Ekong --- , NigeriaThe prevalence of women in the knowledge-based enterprise of traditional healing underscores the role of women in sustainable development. The World Health Organization (WHO) finds that about three quarters of the world’s population depend upon traditional remedies for their health... -
Hospitality in a theatre: The role of physical warmth
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Ruth Pijls --- , The Netherlands Mirjam Galetzka --- , The Netherlands Brenda H Groen --- , The Netherlands Ad T H Pruyn --- , The NetherlandsInsight into psychological mechanisms offers service organisations the opportunity to increase their hospitality performance. The present research shows that physical warmth positively contributes to people’s experience of hospitality. In a field experiment among 127 visitors to a theatre, the effects... -
South African ambitious investment objectives: The current foreign direct investment determinants in South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yacouba Traore --- , South Africa Mammo Muchie --- , South Africa Zeleke Worku --- , South AfricaThe newly elected South African President, Cyril Ramaphosa, set an ambitious objective to attract US$100 billion Foreign Direct Investment (FDI) for South Africa’s sustainable socio-economic development. This paper determines differential factors that influence the flow of FDI into South Africa... -
The product space, sustainability, and GVC oriented industrial policies: The case of iron and steel in the SACU
Item type: Journal Article • Journal: Africa Journal of Management • Authors: W.G. Bam --- , South Africa K. De Bruyne --- , BelgiumThis paper develops, and then applies, a holistic framework that supports industrial policy decision-making at the global value chain (GVC) level, with the aim of stimulating sustainable development in developing countries. Notwithstanding the importance of economic growth for development, industrial... -
Charcoal heaps volume estimation based on unmanned aerial vehicles
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Luiza Marina Esteves de Carvalho --- , Brazil Alessandra Melo --- , Brazil Glauco José de Matos Umbelino --- , Brazil Jan-Peter Mund --- , Germany Jhonathan Gomes dos Santos --- , Brazil Jacqueline Rosette --- , United Kingdom Daniel Silveira --- , São Paulo Eric Bastos Gorgens --- , BrazilThe charcoal stock in a forestry business is controlled based on the theoretical capacity of the masonry ovens (input) and shipped trucks (output). During the year, the company must monitor the stock for accountability reports and internal governance. This paper... -
A historical perspective on fire research in East and Southern African grasslands and savannas
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Simon Pooley --- , United KingdomThis paper provides a history of attempts to understand and manage fire in the grasslands and savannas of eastern and southern Africa from c. 1900 to 2010. Given the brevity of the paper and the author’s expertise, there is a... -
Trends in mussel cover, density and size at exploited and unexploited intertidal reefs in eastern South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Steyn --- , South Africa JC Groeneveld --- , South Africa J Santos --- , Norway XI Mselegu --- , South AfricaThe brown mussel Perna perna is the dominant indigenous mussel along the east coast of South Africa, where it is harvested by recreational and subsistence fishers. High fishing pressure near urban areas led to declining abundance and consequently to the... -
The ecology of coastal wetland ponds created by diamond mining in southern Namibia. 2. Saltmarsh vegetation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Maritz --- , South Africa D Pillay --- , South Africa GM Branch --- , South AfricaDiamond mining on the southern Namibian coastline has created multiple large coastal ponds of up to 380 000 m2 adjacent to the coastline, as the sea overtops erected seawalls or seeps into excavated areas. These ponds span ages of 1–38... -
Factors influencing biometric technology adoption: Empirical evidence from Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: O. Bello --- , Nigeria O. Olanrewaju --- , South AfricaAn exploratory investigation of factors influencing adoption of biometric technologies among public and private organizations in Nigeria is carried out in this study. Based on a modified technology-organization-environment (TOE) theoretical framework, an empirical analysis using data from questionnaires surveyed on... -
Polysubstance use among national samples of in-school adolescents in Dominican Republic, Jamaica, and Trinidad and Tobago
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- , South Africa Supa Pengpid --- , ThailandThis study aimed to provide estimates on current polysubstance use among adolescents in three Caribbean countries. Cross-sectional and national school health survey data (2016-2017) were analysed from 6 269 adolescents (median age = 15 years) in Dominican Republic (n =... -
An evaluation of the environmental behaviour, fate and risk of key pesticides used in South African forest plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Noxolo Nokwethemba Ndlovu --- , South Africa Keith Little --- , South Africa Brenda Baillie --- , New Zealand Carol Rolando --- , New ZealandPesticides are important for the management of pests and diseases that have a negative impact on the sustainability of the forestry industry. Nevertheless, there is a trend to reduce pesticide use owing to the potential detrimental impacts they pose to... -
Nutritional status and psychomotor development in 12–18-month-old children in a post-intervention study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Idah P Rikhotso --- , South Africa Mieke Faber --- , South Africa Marinel Rothman --- , South Africa Tonderayi M Matsungo --- , South Africa Carl Lombard --- , South Africa Cornelius M Smuts --- , South Africa -
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... -
Phylogenetic diversity of Actinobacteria from Momela soda lakes, Arusha National Park, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Sadikiel E Kaale --- , Tanzania Ally Mahadhy --- , Tanzania Modester Damas --- , Tanzania Clarence A Mgina --- , Tanzania Thomas J Lyimo --- , TanzaniaThe Momela soda lakes consist of seven small, hypersaline, alkaline lakes, situated in the East African rift valley at Arusha National Park, Tanzania. The lakes are fed by separate underground water sources with slightly varying mineral contents resulting in colour... -
Modular-mini refineries: Business opportunities in developing economies
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Himmat Singh --- , IndiaDespite generally low return on investment, modular-mini refineries from simple diesel production units to more sophisticated refineries are increasingly becoming a choice of flexible and cost-effective supply for oil producers in remote regions, particularly in developing economies with reasonable to... -
IoT-powered system for environmental conditions monitoring in poultry house: A case of Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Beston Lufyagila --- , Tanzania Dina Machuve --- , Tanzania Thomas Clemen --- , GermanyPoultry health is imperative for the continued growth of poultry and increased production. Environmental conditions such as temperature, humidity, and ammonia gas have an impact on poultry health. They affect the respiratory system and eventually cause death. In Tanzania, most... -
Wangari Maathai’s Environmental Bible as an African Knowledge: Eco-spirituality, Christianity, and Decolonial Thought
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Adriaan van Klinken --- , UKRecent scholarship has acknowledged the contribution of the environmental activist and Nobel Peace Prize Laureate, Wangari Maathai (1940–2011), to African ecological and decolonial thinking. As far as Maathai’s engagement with religion is concerned, scholarship emphasises her critique of Christianity for... -
The mediating role of ICT regulation on the effects of ICT access and ICT use on e-participation: Evidence from structural equation modelling and necessary condition analysis
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Ibrahim Osman Adam --- University for Development Studies, Ghana Muftawu Dzang Alhassan --- SD Dombo University of Business and Integrated Development Studies, GhanaRecently, governments have been using information and communication technologies (ICTs) to provide platforms for citizen engagement and involvement through e-participation. This paper aims to explore the drivers behind e-participation in a global context. The discourse on e-participation in the information... -
Nexus between perceptions of urban environmental planning and solid waste management practices in Debre Markos Town, Amhara Region, Northwest Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Genet Barklign --- University of Gondar, Ethiopia Kassahun Gashu --- University of Gondar, EthiopiaLack of integration between urban environmental planning and solid waste management is a challenge for cities in developing countries. The aim of the research was to analyze the nexus between local communities’ perceptions of urban environmental planning and solid waste... -
Determinants of ICT adoption and uptake at a rural public-access ICT centre: A South African case study
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Cecilia Frans --- , Shaun Pather --- ,The global Covid-19 pandemic has created a heightened sense of awareness of the inequalities that prevail in society. Access to real-time information delivered via broadband internet has become critical for survival. However, the reality of the digital divide implies that... -
Social capital and firm performance nexus: The role of new product development capability and environmental dynamism in an emerging economy
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Patrick Awusak Akanpaaba --- , Ghana Ahmed Agyapong --- , Ghana Henry Kofi Mensah --- , Ghana Samuel Yaw Akomea --- , GhanaThis paper seeks to examine the argument that the social capital and market performance link is more pronounced when it is channelled through the new product development capability of the firm. The study further argues that the indirect effect of... -
Investigating the potential for saltpan restoration for the provision of multiple ecosystem services
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Johan Wasserman --- , South Africa Janine B Adams --- , South Africa Daniel A Lemley --- , South AfricaSaltpans are increasingly being abandoned around the world, leading to the loss of ecosystem services provided by these unique semi-natural wetlands. The desertion of a saltpan at the Swartkops Estuary, South Africa has left behind a large area of desiccated... -
Predictors of staff retention satisfaction: The role of the psychological contract and job satisfaction
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Annette M Snyman --- University of South Africa, South AfricaHigher education institutions in South Africa are experiencing alarmingly high levels of staff turnover and struggling to retain their valuable employees. This study explored whether the psychological contract significantly predicted employees' satisfaction with human resource retention practices within the higher... -
An assessment of the impact of participation in the Oceanographic Research Institute’s Cooperative Fish Tagging Project on angler attitudes and behaviour
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JB Mann-Lang --- , South Africa BQ Mann --- , South Africa GL Jordaan --- , South Africa R Daly --- , South AfricaScientific output has proven the value of the Oceanographic Research Institute’s Cooperative Fish Tagging Project (ORI-CFTP) to biological and fisheries research, with more than 95 published manuscripts based on data from the ORI-CFTP. This study reviews the project from the... -
“Working time” in environmental activism: Engaging “slow violence” in the Philippi Horticultural Area
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Matthew Wingfield --- Stellenbosch University, South AfricaTracing the history of activism in post-apartheid South Africa from the Treatment Action Campaign to the Social Justice Coalition, amongst others, one is able to develop an account of various practices and strategies that have been utilised to leverage state... -
A case study of school support and the psychological, emotional and behavioural consequences of HIV and AIDS on adolescents
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Olubusayo Aduke Asikhia --- , , South Africa Kesh Mohangi --- , , South AfricaVarious studies have reported a huge increase in the numbers of orphaned adolescents in Sub-Saharan Africa and its effects on their psychological, emotional and behavioural development. Yet, their needs are seldom recognised or adequately addressed in policy and programmes.This article... -
Aggregation in Bibron's gecko, chondrodactylus bibronii
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Anita Meyer --- University of Stellenbosch, South Africa P. le FrasN. Mouton --- University of Stellenbosch, South AfricaAggregation behaviour in a rock‐dwelling gecko Chondrodactylus bibronii was investigated. In a laboratory setup, individuals were provided with an excess of shelters to determine whether limited availability of optimal shelters may be the cause of this species’ aggregation behaviour in... -
Are environmental conditions in the eyes of the beholder? Foreign and local firms in Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Lilac Nachum --- Baruch College, City University New York, USA Chris Ogbechie --- Lagos Business School, NigeriaInternational business research has provided substantial empirical evidence that foreign firms investing in countries with adverse environmental conditions may emerge as the main competitors in those countries. Against this backdrop, the dominance of local banks in Nigeria is puzzling. Our... -
Customary ecological conservation of Mwanda-Marungu Pastoral Commons in Taita Hills, south-west Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Daniel Maghanjo Mwamidi --- Institute of Environmental Sciences and Technology (ICTA), Autonomous University of Barcelona, Spain Abdirizak Arale Nunow --- Moi University, Kenya Pablo Dominguez --- Institute of Environmental Sciences and Technology (ICTA), Autonomous University of Barcelona, SpainRural commons in East-Africa have historically played key socio-economic and environmental sustainability. Despite growing interest in this arena, there are still surprisingly few studies that examine rural customary management of pastoral communities in East Africa. This is striking given that... -
A roadmap for present focus and future trends of blockchain technology in the built environment
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Opeoluwa Akinradewo --- University of Johannesburg, South Africa Clinton Aigbavboa --- University of Johannesburg, South Africa Ayodeji Oke --- University of Johannesburg, South Africa David Edwards --- University of Johannesburg, South AfricaBlockchain technology has gained attention across the globe within the last 10 years and has taken centre stage in the financial technology sector. Even though innovation that applies to the construction industry is sometimes different from what is obtainable in... -
The classroom environment and college students’ being silent/hidden dropouts: The chain of mediating effects of college identification and academic achievement
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Yongtao Gan --- Shantou University, China Tian Zhang --- Shantou University, China Jian Gao --- Shantou University, China Yifei Li --- Universiti Malaya, College of Education, Malaysia Jing Zhang --- Shantou University, China Wenjun Wang --- Cleveland State University, USAThe present study investigated the relationship between the classroom environment (CE) and hidden dropout (HD), and the chain mediating role of college identification (CI) and academic achievement (AA) in that relationship. A total of 1 214 Chinese college students were... -
Impact of tourism on residents’ well-being amid the CoVID-19 pandemic in Bali
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Larissa Huser --- Universitas Triatma Mulya International, Indonesia Erna Wiles --- Universitas Triatma Mulya International, Indonesia Rodney Westerlaken --- NHL Stenden University of Applied Sciences, The NetherlandsBy being dependent on one of the most impacted industries, the travel industry, Balinese residents experienced a considerable downturn in their well-being during the COVID-19 pandemic. This research aims to examine the extent to which sociocultural, economic and environmental aspects... -
Ecological Violations and Anthropogenic Pollution in Ngũgĩ wa Thiong’o’s Wizard of the Crow
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Dele Maxwell Ugwanyi --- Enugu State University of Science and Technology, NigeriaEcological violations and anthropogenic pollution have been recurring motifs in contemporary African novels. Existing studies on African literature from the ecological standpoint have focused largely on the narrative strategies of nature writing, with little attention given to the impacts and... -
Representations of Indian Ocean Ecologies, Heritage and Kinship in Banaadiri Fishing Poems and Owuor's The Dragonfly Sea
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Ayan Salaad --- University of Southampton, UKThis article brings Yvonne Owuor’s 2019 novel The Dragonfly Sea into conversation with nine Banaadiri fishing poems called geeraarro, a form of classical Somali oral poetry in the maanso category. I explore the ways in which ideas of labour, kinship,... -
Materials selection and installation decisions for sustainable upgrade of existing structures: Case study of Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: John Dadzie --- Kumasi Technical University, Ghana Goitseone Buccah Sebitla --- University of Technology Sydney, Australia Goran Runeson --- University of Technology Sydney, AustraliaThe negative effects of construction on the environment have been acknowledged all over the world. Materials and technologies are developed regularly to help address challenges posed by rising populations and related energy demands and emissions. The purpose of this study... -
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,... -
Father–child relationship and children’s peer competence: Mediated by children’s emotional regulation and environmental adaptation
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Wenxiao Cui --- Shaoxing University, China Ruiqian Li --- Shaoxing University, China Xiao Yang --- Shaoxing University, China Xia Wu --- Shaoxing University, ChinaThis study aimed to explore father–child relationships and young children’s peer competence, as mediated by child emotional regulation and environmental adaptation. The children’s fathers and teachers completed peer competence, child emotional regulation and environmental adaptation measures on 216 Chinese children... -
Estimation of genetic parameters for growth in a population of Eucalyptus grandis × Eucalyptus nitens hybrids in KwaZulu-Natal and Mpumalanga
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: W Brink --- Sappi Shaw Research Centre, South Africa G van den Berg --- Sappi Shaw Research Centre, South Africa A Nel --- Sappi Shaw Research Centre, South Africa B du Toit --- University of Stellenbosch, South AfricaHybridising Eucalyptus grandis with Eucalyptus nitens produces progeny intended to combine the favourable traits of both parents. E. grandis exhibits good growth, stem form, wood properties and rooting ability for vegetative propagation. E. nitens displays superior cold tolerance, including superior... -
Critical thinking: Stakeholder expectations and challenges for Accountancy educators
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: E. A. J. Terblanche --- University of South Africa, South Africa C. C. Shuttleworth --- University of South Africa, South Africa A. A. van Rooyen --- University of South Africa, South Africa R. N. Masela --- University of South Africa, South AfricaDeveloping future accountants who are critical thinkers, able to adapt in a volatile, uncertain, complex, and ambiguous (VUCA) world, remains one of the biggest challenges facing accounting educators. Competency frameworks of professional accounting bodies do provide some guidance in terms... -
Low hypoxia tolerance in larvae of the sardine Sardinops sagax and anchovy Engraulis encrasicolus may limit their stock recovery in the northern Benguela upwelling system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Kunzmann --- Leibniz Centre for Tropical Marine Research (ZMT), Germany RM Imam --- Leibniz Centre for Tropical Marine Research (ZMT), Germany SJ Geist --- Leibniz Centre for Tropical Marine Research (ZMT), GermanyPhysiological traits of five key fish species (Cape hake Merluccius spp., pelagic goby Sufflogobius bibarbatus, Cape horse mackerel Trachurus capensis, European anchovy Engraulis encrasicolus and sardine Sardinops sagax) from the northern Benguela upwelling system (NBUS) were compared during their larval... -
Acoustic telemetry reveals the drivers behind estuary–sea connectivity of an important estuarine-dependent fishery species, Pomadasys commersonnii, in the Breede Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BA Ziko --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa TS Murray --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa TF Næsje --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa JD Filmalter --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa PD Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaThe spotted grunter Pomadasys commersonnii is an important estuarine-dependent fishery species known to spawn along the east coast (KwaZulu-Natal Province) of South Africa. However, recent evidence suggests that this species also spawns along the southwest coast in the Western Cape... -
Prevalence of anaemia in pregnancy and associated factors in northern Uganda: a cross-sectional study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Samson Udho --- Lira University, Uganda Joyce Nankumbi --- Makerere University, Uganda Mariam Namutebi --- Makerere University, Uganda David Mukunya --- Sanyu Africa Research Institute, Uganda Grace Ndeezi --- Makerere University, Uganda James K Tumwine --- Makerere University, Uganda -
Development and testing of a nutrition education tool on iron supplementation for pregnant women
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: P Mahundi --- University of KwaZulu-Natal, South Africa K Pillay --- University of KwaZulu-Natal, South Africa N Wiles --- University of KwaZulu-Natal, South Africa -
Site- and habitat-dependent variations in the diversity of polychaetes associated with golden kelp Ecklonia radiata holdfasts along the southeast coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Nkohla --- Walter Sisulu University, South Africa TS Dlaza --- Walter Sisulu University, South AfricaPolychaetes are important components of the macrofaunal communities associated with golden kelp Ecklonia radiata holdfasts across different spatial scales. However, the polychaete component varies in different habitat types in response to varying environmental conditions. Here, we compared patterns of variation... -
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... -
Parents’ environmental knowledge and perception of young children’s nature connectedness: The serial mediating role of parents’ environmental concern and parent–child engagement
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Zeng Xiaoying --- Nanjing Normal University, ChinaThis study explored the relationship between parents’ environmental knowledge and 3- to 6-year-old children’s nature connectedness, and the mediating role of parents’ environmental concern and parent–child engagement in that relationship. Participants were 427 parents from rural western China (female =... -
The impact of sustainable investment on firm performance in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Vongani V. Masongweni --- University of Johannesburg, South Africa Beatrice D. Simo-Kengne --- University of Johannesburg, South AfricaPurpose: This study investigates the influence of environmental, social, and governance (ESG) scores on the financial performance of firms in South Africa across industries. -
Species diversity and distribution-pattern determinants of African rivulines (Cyprinodontiformes: Nothobranchiidae) in rainforest streams of southern Cameroon
Item type: Journal Article • Journal: African Zoology • Authors: FD Messu Mandeng --- Higher Teacher’s Training College (ENS), University of Yaoundé I, Cameroon CF Bilong Bilong --- University of Yaoundé I, Cameroon JF Agnese --- University of Montpellier (CNRS, IRD, EPHE), FranceUnderstanding the community structure and ecology of fish populations in rainforest streams is a prerequisite for any actions towards their exploitation, management or conservation. We examined the community structure and species diversity of nothobranchiids (African rivulines) in rainforest streams of... -
Assessment of surface water quality in a highly anthropised semi-arid catchment (Case of Wadi El Hatab Basin, Tunisia, North Africa)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: W Hayouni --- University of Sfax, Tunisia N Chkir --- University of Sfax, Tunisia S Pistre --- Université Montpellier, France K Zouari --- University of Sfax, TunisiaAnthropogenic contamination of surface waters is a critical issue in urbanised catchments, especially in Mediterranean environments with scarce water resources and intermittent rivers. A combined hydro-geochemical and multivariate statistical methodology has been applied to evaluate the surface water quality of... -
Organisational attachment in hospitality organisations: a review
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Aladin M Ibrahim --- Faculty of Hospitality and Tourism Management, UCSI University, MalaysiaThe hospitality industry relies on dedicated and emotionally connected employees to deliver exceptional guest experiences and maintain competitiveness. However, high turnover rates pose challenges for organisations in retaining devoted employees. Organisational attachment, encompassing affective commitment, organisational identification and turnover intentions,... -
Identification of main variables in forest management for recovery of endemic species habitat in burned areas of southern Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Roberto Moreno --- Instituto de Investigación Sistema Tierra (IISTA), Universidad de Córdoba, España Ricardo Zamora --- Universidad de Córdoba, España Norman Moreno-García --- Universidad Mayor, Chile Carlos Esse --- Instituto Iberoamericano de Desarrollo Sostenible (IIDS), Universidad Autónoma de Chile, Chile Carmen Galán --- Instituto de Investigación Sistema Tierra (IISTA), Universidad de Córdoba, España Juan Ramón Molina --- Universidad de Córdoba, EspañaWildfires are among the most serious disturbances that affect forest biodiversity, damaging both flora and fauna. In some burned areas, vegetation recovery is a long and complex process that requires the support of restorative actions. This study evaluated changes in... -
Influence of different temperatures on seedling growth and development of Calobota sericea, a semi-arid rangeland species of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois Müller --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South Africa Letty Masemola --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South Africa Fortune Manganyi --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South Africa Nothando Ngcobo --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South AfricaThis study determined how temperature affected the early growth of seedlings of Calobota sericea (Thunb.) Boatwr. & B.-E.van Wyk. One-month-old C. sericea seedlings were grown at constant temperatures of 2.5, 5, 10 and 20 °C for 30 days. After 30... -
Spatial and seasonal variation of microplastics and surface water quality of the Njoro River and Lake Nakuru ecosystems, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Petra Kienyiy Chui --- Egerton University, Kenya Bernard Kibet Kirui --- Egerton University, Kenya Meshack Amos Obonyo --- Egerton University, KenyaHigh levels of plastic pollutants threaten aquatic habitats as the plastic materials are ingested by aquatic organisms as food. This study assessed seasonal variations of microplastics and the water quality of the Njoro River and Lake Nakuru, Kenya. Selected water... -
Maize farmers’ perceptions of the use of agrochemicals and their impact on the environment: A case study of Iringa District Council, Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Caphlene Japhet Peter --- University of Dar es Salaam, Mkwawa University College of Education, Department of Geography and Economics, Tanzania Sospeter Jibunge Charles --- University of Dar es Salaam, Mkwawa University College of Education, Department of Geography and Economics, Tanzania Michael Elias Mgalula --- University of Dar es Salaam, Mkwawa University College of Education, Department of Geography and Economics, TanzaniaThis study examines farmers’ perceptions of agrochemical use in maize production and their harmful environmental effects. A convergent parallel mixed design was used to collect quantitative data from 254 respondents via structured interviews and qualitative data through in-depth interviews 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... -
Phylogenetic diversity of Actinomycetota species isolated from waters of Lake Natron, Arusha, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Sadikiel E Kaale --- University of Dar es Salaam, Tanzania Robert S Machangu --- St. Francis University College of Health and Allied Sciences, Tanzania Thomas J Lyimo --- University of Dar es Salaam, TanzaniaActinomycetota are bacteria with biotechnological potential known to produce bioactive compounds in their natural ecosystems. Natural ecosystems include extreme environments such as soda lakes. Lake Natron is one of the soda lakes found in Arusha region, Tanzania. This study aimed... -
Sustainable seafood: advances in traceability, assessment, monitoring and resource management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: IG Gleadall --- , Japan A Barkai --- , South Africa Z Lajbner --- Okinawa Institute of Science and Technology Graduate University (OIST), Japan PB McIntyre --- Cornell University, United States H Moustahfid --- National Oceanic and Atmospheric Administration (NOAA), United States P Olsen --- Norwegian Food Research Institute (Nofima), Norway R Oyanedel --- Pontificia Universidad Católica, Chile Y Pang --- University of Washington, United States GJ Pierce --- Instituto de Investigacións Mariñas (IIM-CSIC), Spain L Quesada --- Loyola Marymount University, United States WHH Sauer --- Rhodes University, South Africa L Zifcakova --- Okinawa Institute of Science and Technology Graduate University (OIST), Japan MA Zoral --- Okinawa Institute of Science and Technology Graduate University (OIST), Japan DA Willette --- Loyola Marymount University, United StatesThis review presents a synopsis of advances in some techniques and technologies that support seafood traceability while addressing some of the complexities currently challenging the integration necessary to coordinate commercial, national and international efforts in achieving seafood sustainability. These advances... -
Predictors of vitamin D status in undernourished and well-nourished children 6–59 months old, in the JB Marks Municipality of South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: JA Carboo --- North-West University, South Africa L Malan --- North-West University, South Africa M Lombard --- North-West University, South Africa N Maleka --- North-West University, South Africa A Nienaber --- North-West University, South Africa R Claire Dolman-Macleod --- North-West University, South Africa -
Considering risk associated with leisure time physical activity (LTPA) at craft breweries: overlooking dangers in the name of fun
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Alana N Seaman --- Tourism, Recreation, & Sport, University of North Carolina Wilmington, USA Lindsey Schroeder --- Athletic Training, University of North Carolina Wilmington, USA Madison Peace --- Athletic Training, University of North Carolina Wilmington, USA Michele Abee --- Bellarmine University, USA Laura Morris --- Tourism, Recreation, & Sport, University of North Carolina Wilmington, USAMany breweries in the US have become popular settings for leisure time physical activity (LTPA). While risk is widely accepted as an inherent part of sport and physical activity (PA), breweries are places of increased risk due to the nature... -
Risk spillovers among global oil & gas firms
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Oluwasegun B. Adekoya --- University of Maine, USA Johnson A. Oliyide --- University of Maine, USA Ademola B. Akinseye --- Tai Solarin University of Education, Nigeria Mamdouh Abdulaziz Saleh Al-Faryan --- University of Portsmouth, UKThis study examines the risk spillovers among the world’s top oil & gas firms, accounting for the role of environmental fiscal policies, economic policy uncertainty (EPU), and regulatory quality. We find evidence of high risk spillovers among the oil &... -
Arenicolidae (Annelida) in Norwegian waters: species occurrence, bathymetric distribution and identification of juvenile specimens
Item type: Journal Article • Journal: African Zoology • Authors: Marthe R Dille --- Norwegian University of Science and Technology, NTNU University Museum, Norway Jon A Kongsrud --- University Museum of Bergen, University of Bergen, Norway Martin M Hektoen --- Norwegian University of Science and Technology, NTNU University Museum, Norway Torkild Bakken --- Norwegian University of Science and Technology, NTNU University Museum, NorwayThe two species of Arenicolidae, Arenicola marina and Arenicolides ecaudata, are common along the Norwegian coast. Juveniles and anterior fragments are often encountered when grab sampling, making traditional morphological characteristics insufficient for species identification. This study examined the robustness of... -
Stability and performance of Bambara groundnut (Vigna subterranea (L.) Verdc.) genotypes in different South African environments
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sithembile Kunene --- University of KwaZulu-Natal, Pietermaritzburg campus, College of Agriculture, Engineering and Science, School of Agricultural Earth, and Environmental Sciences, South Africa Abe Shegro Gerrano --- Agricultural Research Council, Vegetable, Industrial and Medicinal Plants, South Africa Alfred Oduor Odindo --- University of KwaZulu-Natal, Pietermaritzburg campus, College of Agriculture, Engineering and Science, School of Agricultural Earth, and Environmental Sciences, South AfricaGlobal food security faces challenges arising from population growth, climate change, and the prevalence of monoculture agriculture. In addressing these concerns, Bambara groundnut (Vigna subterranean (L.) Verdc.) emerges as a promising crop due to its nutritional richness and resilience in... -
Amplifying success in SMEs: Harnessing the joint power of social capital and new product development capability in developing economies
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Ahmed Agyapong --- Kwame Nkrumah University of Science and Technology, Ghana Patrick A. Akanpaaba --- Accra Business School, Ghana Tesfalidet Tukue --- Southern University, USA Amo Sarpong --- Kwame Nkrumah University of Science and Technology, GhanaThis study examines the ongoing debate in scholarly literature regarding the role of firm-specific resources and capabilities – namely, social capital (SC) and new product development capability (NPDC) – in influencing firm performance. Addressing a critical gap, the research explores... -
Tracing the evolution of environmental practices research in the hotel industry: a mixed-review perspective
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Christopher Mensah --- Ho Technical University, Ghana Edem M. Azila-Gbettor --- Ho Technical University, Ghana Divine Tuinese Novieto --- Ho Technical University, Ghana George Harrison Coffie --- Ho Technical University, Ghana Eric Kodzo Adzivor --- Ho Technical University, GhanaThe purpose of the study is to map the terrain of extant literature on green hotel practices conducted over 40 decades (1983–2020) and identify the gaps to be addressed by future research. The study examines the content of 561 articles... -
Green practice implementation strategies and sustainability: a case of Kenya’s city hotels
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Elizabeth Kamunzyu --- The Technical University of Kenya, Kenya Josephine Opondo --- Jaramogi Oginga Odinga University of Science and Technology, Kenya Richard Makopondo --- The Technical University of Kenya, KenyaDespite hotels pursuing sustainability through the adoption of green practices, how the adoption is implemented has not attracted much research attention. Thus, this study explores the implementation strategies employed by city hotels in Kenya in their adoption of green practices,... -
Techno-economic and environmental assessment of battery integrated wind farm siting across offshore Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Gbubemi Kevin Akporhonor --- Energy and Environment Cranfield University, United KingdomThis study investigates the economic, technical, and environmental impacts of integrating a battery energy storage system (BESS) with an offshore wind farm near Koko Sea Port, Nigeria. As renewable energy curtailment increases and Nigeria’s energy demand grows, energy storage systems... -
Provenance variation, genetic parameters, and potential gains in Eucalyptus viminalis subsp. nobilis tested in two high altitude cool temperate sites in the summer rainfall region of South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Christopher Komakech --- , South Africa Annabel Fossey --- , South AfricaOver the past 50 years, commercial forestry in South Africa has expanded into mid and high altitude summer rainfall regions, predominantly planting Eucalyptus nitens and Eucalyptus macarthurii. However, the suitability of these sites is increasingly threatened by projected climate changes... -
Role of subregional cooperation towards environmental conservation
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Robita Lee Robinson --- Universiti Malaya, Malaysia Angathevar Baskaran --- Universiti Malaya, Malaysia Sonia Kumari Selvarajan --- Universiti Malaya, MalaysiaThis study examines the role of subregional cooperation in advancing environmental conservation within the ASEAN framework, focusing specifically on the Indonesia-Malaysia-Thailand Growth Triangle (IMT-GT) and its institutional body, the Centre for IMT-GT Subregional Cooperation (CIMT). Through qualitative analysis based on... -
Influence of water physico-chemical properties and vegetation type on the distribution of schistosomiasis intermediate host snails in Nelson Mandela Bay, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PS Campbell --- Nelson Mandela University, South Africa JB Adams --- Institute for Coastal and Marine Research and Department of Botany, Nelson Mandela University, South Africa M Thwala --- Nelson Mandela University, South Africa O Oyedele --- Nelson Mandela University, South Africa PE Melariri --- Nelson Mandela University, South AfricaSchistosomiasis is an infectious water-borne disease transmitted by Schistosoma flatworms. Humans become infected through skin penetration following exposure to water contaminated with schistosome cercariae. This study assessed the physico-chemical properties of the water bodies, vegetation type, distribution and habitat presence... -
Occurrence and persistence of Blacksmith Lapwings Vanellus armatus and Crowned Lapwings V. coronatus and their reproductive success in an urban mosaic landscape
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Feziwe Phoswa --- School of Life Sciences, University of KwaZulu-Natal, South Africa S Thobeka Gumede --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaUrbanised landscapes continue to expand globally, leading to increased habitat fragmentation, which creates a mosaic of natural and managed landscapes. These environmental changes have an impact on bird populations, and are reflected in the declining populations of open-habitat species. Despite... -
III. Responsive feeding: establishing healthy eating behaviour early on in life
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Harbron J --- Division of Human Nutrition, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Booley S --- Division of Human Nutrition, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Najaar B --- Division of Human Nutrition, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Day CE --- Division of Human Nutrition, Department of Human Biology, Faculty of Health Sciences, University of Cape Town,Responsive feeding (RF) refers to a reciprocal relationship between an infant or child and his or her caregiver that is characterised by the child communicating feelings of hunger and satiety through verbal or nonverbal cues, followed by an immediate response... -
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... -
Sediment dynamics in the Roman Rock area of False Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Terhorst --- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia M de Vos --- University of Connecticut, United States C Rautenbach --- Waikato Regional Council, New ZealandThis study investigated sediment dynamics in the Roman Rock area of False Bay, South Africa, by integrating sediment grain size data with hydrodynamic and wave modelling. We examined two significant events: a long-period southwesterly swell in 2008, and a prolonged... -
Effects of diamond mining on sandy beaches in southern Namibia – the use of Tylos granulatus (Isopoda: Oniscidea) as an indicator species
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Hutchings --- , South Africa A Rees --- , South Africa A Pulfrich --- , South Africa BM Clark --- , South AfricaSandy beaches provide vital ecosystem services and support diverse ecological communities but are increasingly threatened by anthropogenic pressures. In particular, intertidal mining disrupts sandy beaches and challenges their resilience, yet these ecosystems retain some capacity for environmental recovery. This study... -
Comparing seismic survey mitigation regulations: lessons for South Africa from international frameworks
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Purdon --- Tshwane University of Technology, South Africa MJ Somers --- University of Pretoria, South Africa FW Shabangu --- University of Pretoria, South Africa Y Doh --- , France J Scheun --- Tshwane University of Technology, South AfricaUnderwater seismic surveys generate high-intensity, low-frequency noise that can negatively affect a range of marine fauna. As a result, countries have implemented mitigation regulations to reduce the potential impacts of this activity. This study examines seismic survey mitigation regulations from... -
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... -
Prediction of ambient air pollution with regression approach using machine learning
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bachandeep Singh Bhathal --- University Institute of Computing, Chandigarh University, India Gaurav Gupta --- Punjabi University, India Brahmaleen Kaur Sidhu --- Punjabi University, IndiaAccurate air quality prediction is vital for managing pollution and protecting public health. This study evaluates the performance of three machine learning models – Decision Tree Regression (DTR), Linear Regression (LR), and Random Forest Regression (RFR) – to forecast the... -
Environmental innovation and green total factor productivity: What role does government environmental attention play?
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Tingqian Pu --- Guizhou University of Commerce, People’s Republic of ChinaEnvironmental innovation (EI) has become an essential driver of sustainable development, yet its influence on green total factor productivity (GTFP) remains underexplored. This study examines how EI affects GTFP and evaluates the moderating role of government environmental attention (GEA). Using... -
The genetic control of early growth properties in Pinus patula × Pinus tecunumanii hybrid families
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JP de Villiers --- Sappi Shaw Research Centre, South Africa A Nel --- Sappi Shaw Research Centre, South Africa B du Toit --- University of Stellenbosch, South AfricaThe objective of this study was to determine the genetic control of growth properties in Pinus patula × Pinus tecunumanii hybrid families across seven sites planted in the summer rainfall region of southern Africa. Genetic material included in the analyses... -
Making and remaking life under threat: fenceline communities in eMalahleni, Mpumalanga
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Zaakiyah Rabbaney --- University of the Western Cape, South AfricaIn fenceline communities alongside coal extraction operations in South Africa, residents experience extreme environmental, social and economic conditions that can be traced to the country’s extractivist economy and race-based capitalist logic that created informal settlements in abandoned landscapes to which... -
Comparative benchmarking of fertiliser uses for oilseed crop production in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: HT Ottermann --- , South Africa SJ Haarhoff --- Stellenbosch University, South Africa KJ Truter --- , South Africa F Meyer --- , South Africa D van der Westhuizen --- , South Africa PA Swanepoel --- Stellenbosch University, South AfricaThis study comparatively benchmarks fertiliser use over two periods (2013–2015; 2021–2023) in South Africa's oilseed crop production [soybean (Glycine max), canola (Brassica napus) and sunflower (Helianthus annuus)] against global trends, with a focus on major oilseed exporters. It explores fertiliser... -
Physiological traits associated with drought tolerance in Moroccan chickpea
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Meriem Tabouktirt --- University Hassan II, Morocco Fatoumata Farida Traore --- University Hassan II, Morocco Sara Fahde --- , Morocco Ayyoub Ammar --- University Hassan II, Morocco Hasnae Choukri --- , Morocco Said Boughribil --- University Hassan II, MoroccoIn a greenhouse experiment conducted in Mohammedia, drought stress responses were evaluated under two treatments (100% and 50% of field capacity; FC) in six Moroccan chickpea varieties: Arifi, Bouchra, Farihane, Moubarak, Rizki, and Zahour. The susceptibility index (SI) clearly differentiated... -
Physico-chemical variables influencing the distribution and abundance of macroinvertebrates in salt marsh habitats of the Berg River Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NT Mngomezulu --- Department of Plant Sciences, University of the Free State, South Africa N Peer --- Department of Botany and Zoology, Stellenbosch University, South Africa A Rajkaran --- Department of Biodiversity and Conservation Biology, University of the Western Cape, South Africa DA Veldkornet --- Department of Plant Sciences, University of the Free State, South AfricaMacroinvertebrates such as snails and crabs influence aspects of salt marsh structure and function through herbivory and bioturbation. However, the effects of physico-chemical variables and habitat composition on their abundance and distribution remain underexplored. This study examined the influence of...
