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Adjusting Faustmann's Formula for a Dynamic Financial Environment
Item type: Journal Article • Journal: South African Forestry Journal • Authors: H. J.E. Uys --- Department of Forest Science,The well-known LEV criterion or Faustmann's formula which evolved in the static financial environment of the nineteenth century is adjusted to take account of the changes in the dynamic financial environment of today. A previous incorrect attempt to adjust LEV... -
A New Form of Internal Rate of Return
Item type: Journal Article • Journal: South African Forestry Journal • Authors: H. J.E. Uys --- Department of Forest Science,When the Internal Rate for Return (IRR) of a forestry project is calculated by means of traditional methods which ignore real price changes, the IRR for one rotation of the project is identical to the IRR for an infinite series... -
Evaluating Forestry Land During Inflationary Times
Item type: Journal Article • Journal: South African Forestry Journal • Authors: H. J.E. Uys --- Department of Forest Science,The Land Expectation Value criterion has been used since 1849 to calculate the value of forestry land. It was, however, developed in a static financial environment, and is no longer suitable for land valuation in today's dynamic financial environment. This... -
The Influence of Site Factors on the Foliar Nutrient Content of Eucalyptus grandis in Natal
Item type: Journal Article • Journal: South African Forestry Journal • Authors: M.A. Herbert --- Institute for Commercial Forestry Research, South AfricaAlthough foliar analysis is commonly used to diagnose the nutritional status of trees and their ability to respond to fertilising, it is also a measure of site type and quality. The availability of nutrients in the soil varies with climatic... -
Determination of the Long-term Profitability of Forestry Projects
Item type: Journal Article • Journal: South African Forestry Journal • Authors: H.J.E Uys --- Department of Forest Science, J.H. Nel --- Department of Water Affairs and Forestry,A planned forestry project which appears to be profitable for one rotation will not necessarily be profitable in the long term. It can change to an unprofitable project after a number of profitable rotations. Sustained profitability will depend on the... -
Exploring the potential of the descending‐point method to measure utilization in karoo veld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: F.O. Hobson --- Department of Agriculture (eastern Cape Region), A.S.J. Baarnhoorn --- Department of Agriculture (Karoo Region),The descending‐point method of vegetation survey proved effective in measuring meaningful plant cover changes during a grazing period. No significant changes in basal cover or plant height were detected. Changes in canopy spread and canopy cover could only be used... -
Lime and phosphorus effects on the dry matter production of eragrostis curvula on dystrophic clay soils
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Miles --- Department of Soil Science and Agrometeorology, J.M. de Villiers --- Department of Soil Science and Agrometeorology,The dry matter yield responses of Eragrostis curvula to P and lime over two seasons on Balmoral and Balgowan soil series in the Natal Mistbelt are discussed. With this work forming part of a study aimed at characterizing P fixation... -
Relations between soil factors and herbage yields of natural grassland on sandy soils in the south‐eastern Transvaal
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 Africa M. Swart --- Department of Agricultural Development (Transvaal Region), Republic of South Africa M.F. Smith --- , Republic of South Africa G.H. Wiltshire --- , Republic of South AfricaForty systematically‐placed observation points were established in a 1.5‐ha area of floristically unifoim veld in which productivity varied spatially. At each point grass yields were determined by harvesting quadrats at eight‐week intervals during the growing season, and the volumetric water... -
Relationship between cation exchange capacity, clay content and water retention of Highveld soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AstridM. Lambooy --- ,Water in the soil is held by capillary and adsorption forces. These forces are mainly a function of clay content and mineralogy. To neglect the influence of clay mineralogy when estimating the water-holding properties of soil, implies that only a... -
Measurement of exchangeable aluminium in soils and clay minerals by isotopic exchange
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. A.G. Kotzé --- , Marlise Joubert --- , Johannes.F. de Villiers --- , M. van der Westhuizen --- , D. van der Bank --- ,Isotopically exchangeable Al was determined in soils and clay minerals by equilibration with 28Al. Best results were obtained with a weak extractant and an equilibration time of eight min. The calculated amount of isotopically exchangeable Al was independent of the... -
Effect of moisture supply on CAM in Opuntia aurantiaca (jointed cactus)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B.H. Whiting --- Department of Botany, E.E. Campbell --- Department of Botany,The patterns of gas exchange exhibited by Opuntia aurantiaca under controlled conditions (photoperiod 12 h; day/night temperature regime 30/15°C) were investigated for plants subjected to various levels of moisture stress. Unstressed plants exhibited a typical full-CAM pattern of gas exchange... -
A proposed mechanism for the volatilization of ammonia from fertilized neutral to alkaline soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.C. du Preez --- Department of Soil Science, R. du T. Burger --- Department of Soil Science,Ammonia volatilization from five soils, ranging in clay content from 7,6 to 49,9%, were determined after pH values of the soils were adjusted to 8,0. Ammonium sulphate, limestone ammonium nitrate, urea, monoammonium phosphate and diammonium phosphate were applied on the... -
Kleimineralogie, katioonuitruilkapasiteit en waterhouvermoë van grondvorms in die Hoëveldstreek
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AstridM. Hattingh --- Hoëveldstreek, Departement van Landbou en Watervoorsiening,Kleimineralogiese data vir 12 grondvorms, wat algemeen in die Hoëveldstreek voorkom, is ondersoek. Die persentasie monsters waarin 'n bepaalde kleimineraal voorkom, is bereken. Daaruit is dit duidelik dat smektiet algemeen in gronde van die Arcadia-, Bonheim, en Rensburgvorms voorkom, maar... -
Effects of clay mineralogy and soil sodicity on soil infiltration rate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.J. Levy --- , Republic of South Africa H. v.H. van der Watt --- Department of Soil Science and Plant Nutrition, Republic of South AfricaCrust formation and infiltration rates and their dependence on the exchangeable sodium percentage (ESP) of South African (SA) soils, with kaolinite and illite as the dominant clay minerals, were studied by subjecting them to simulated rain. The final infiltration rate... -
Comparison of methods for estimating cation exchange capacity of orchard soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marie Conradie --- , Republic of South Africa W. A.G. Kotze --- , Republic of South AfricaVarious methods for estimating soil cation exchange capacity (CEC) were compared. CEC obtained by the sum of extractable cations and the Adams-Evans buffer method were considerably higher than those obtained by saturation and displacement of either NH4 + or Na+... -
The effect of lime, KCl and parent material on the cation exchange capacity of some acid subsoils of the western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South AfricaCation exchange capacity (CEC) values obtained by 22Na dilution for a number of mineralogically diverse acid subsoils reflected positive responses to lime and to treatment with KCl such that: CEC (unlimed, no KCl) < (unlimed + KCl) < (limed, no... -
Die verwantskap tussen maksimum nitrifikasietempo en relevante eienskappe van gronde vanaf die sentrale besproeiingsgebiede in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Laubscher --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie oogmerk van die studie was om die verwantskappe tussen maksimum nitrifikasietempo (Kmaks) en relevante eienskappe van die gronde vanaf die sentrale besproeiingsgebiede uit te wys. Die verloop van nitrifikasie is in agt gronde, afkomstig van die gebiede, gemonitor na... -
Urease-aktiwiteite in gronde van die sentrale besproeiingsgebiede in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F. P.J. Thormählen --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie oogmerk met die studie was om die omvang van urease-aktiwiteite in die besproeide gronde vas te stel en watter grondparameters dit beïnvloed. Die verloop van hidrolise is in agt gronde, afkomstig van die sentrale besproeiingsgebiede, gemonitor na toediening van... -
Polymer effect on infiltration and erosion of sodic soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. Gal --- , Republic of South Africa R. Stern --- , Republic of South Africa J. Levin --- , Republic of South Africa M. Ben-Hur --- , Republic of South AfricaRunoff from irrigated sodic soils is a common phenomenon in arid and semi-arid climates. The effect of a low-charge polysaccharide (LCCP) on infiltration rate (IR) and runoff on two red apedal soils was studied using an irrigation simulator. One was... -
A comparison of methods used for the extraction of K in soils of the Western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.R. Thompson --- Department of Agricultural Development, Republic of South AfricaA number of common soil extractants, mainly those used for soil P, were used to extract K from a range of widely differing soils which occur in the Western Cape; the objective being to evaluate the simultaneous determination of P... -
Ceramic suction samplers: A reliable method for extracting soil solutions for analysis
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. Grobler --- Department of Plant Production and Soil Science, South Africa A.S. Claassens --- Department of Plant Production and Soil Science, South Africa J.G. Annandale --- Department of Plant Production and Soil Science, South AfricaCeramic samplers are used to extract soil solutions at different depths from the soil profile for chemical analysis. The advantage of this method is that samples can be taken at any time provided that the soil water potential is high... -
Ameliorative effects of calcium on growth and mineral uptake of salt-stressed amaranth
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E.N. Ornami --- Department of Plant Production and Soil Sciences, South Africa P.S. Hammes --- Department of Plant Production and Soil Sciences, South AfricaThe detrimental effects of salinity stress in plants may be ameliorated by calcium. However, little is known concerning the efficacy of different calcium sources, especially in amaranth. Two amaranth genotypes (Amaranthus tricolor and A. cruentus) were grown in a greenhouse... -
Multivariate analysis of selected allied chemical properties of soils 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 statistical relationships between base saturation percent (BSP), cation exchange capacity (CEC), pH(water) and electrical conductivity (EC) in soils within close proximity to the abandoned Kgwakgwe Mn oxide ore mine, Botswana. Four hundred soil samples... -
Physiological traits associated with drought tolerance in bread wheat (Triticum aestivum L.) under tropical conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.K. Kimurto --- Department of Crop and Soil Sciences, Kenya J.B.O. Ogola --- Department of Plant Production, South Africa M.G. Kinyua --- Department of Crop Science and Biotechnology, Kenya J.M. Macharia --- Department of Botany, Kenya P.N. Njau --- , KenyaAlthough it is generally accepted that drought tolerance is a critical agronomic trait, efficient and predictable improvement in drought tolerance in bread wheat (Triticum aestivum L.), in varying drought stress conditions, has not been fully achieved. This study aimed at... -
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,... -
POPULATION DYNAMICS AND DEMOGRAPHY OF AN ESTUARINE COPEPOD (PSEUDODIAPTOMUS EESSEI) IN LAKE SIBAYA, A SUBTROPICAL FRESHWATER COASTAL LAKE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: RC Hart --- , South AfricaPopulation size and stage structure of Pseudodiaptomus hessei (Mrázek) was studied over 27 months at a single site in subtropical Lake Sibaya. Population density varied seasonally from about 1 to 4 individuals per litre, but a fairly stable population structure... -
STUDIES ON THE ZOOBENTHOS OF SOME SOUTHERN CAPE COASTAL LAKES. SPATIAL AND TEMPORAL CHANGES IN THE BENTHOS OF SWARTVLEI, SOUTH AFRICA, IN RELATION TO CHANGES IN THE SUBMERGED LITTORAL MACROPHYTE COMMUNITY
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.R. Davies --- , South AfricaMajor changes in the benthic macro-invertebrate community of the littoral zone of Swartvlei, South Africa, took place between January and April 1978, and the equivalent months of 1980. These changes, which were associated with a collapse of the submerged littoral... -
THE ZOOBENTHOS OF THE TOUW RIVER FLOODPLAIN
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.R. DAVIES --- Institute for Freshwater Studies, Republic of South AfricaAn eighteen month study (January 1979 - June 1980) of the sediment, emergent and submerged plant-associated benthic macro-invertebrates of the western sector of the Touw River Flood-plain is reported for four study sites: Wilderness Lagoon, the Touw River and East... -
NUTRIENT CYCLING IN MARINE ECOSYSTEMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: P. Chapman --- , South AfricaThe overall cycles of nitrogen, phosphorus and silicon in the sea are described and compared. Data on the fluxes and rates of change between various pools of each nutrient are given, where available, and gaps in knowledge are pointed out... -
A LIMNOLOGICAL SYNOPSIS OF BHANGAZI SOUTH, A DYSTROPHIC COASTAL LAKE IN THE GREATER ST LUCIA WETLAND PARK (KWAZULU/NATAL), WITH COMMENTS ON ITS CONSERVATION VALUE.
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R. C. Hart --- , , South Africa C. C. Appleton --- , , South AfricaBase-line limnological and biological data are given for Lake Bhangazi South, a small lake on the coastal plain of Kwazulu-Natal, South Africa. This shallow (Zmax < 6 m), subtropical lake is a warm and seemingly continuously polymictic system, but experiences... -
Impacts of non-selective grazing on cover, composition, and productivity of Nama-karoo grassy shrubland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C. Beukes R.M. CowlingThe non-selective rotational grazing system has undergone a long and controversial development. The merits of this grazing system, where relatively large numbers of livestock are herded into numerous small paddocks for short timespans with long rests between grazings, have not... -
Predicting the extent of succulent thicket under current and future climate scenarios
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MP Robertson AR PalmerUsing data from the distribution records of the facultative CAM succulent shrub Portulacaria afra, and high resolution climate response surfaces, we developed a spatially explicit model of the potential distribution of the species in the Thicket Biome of the eastern... -
Response to elevated CO2 from a natural spring in a C4-dominated grassland depends on seasonal phenology
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SJE Wand GF Midgley WD StockA South African C4-dominated grassland was exposed to twice-ambient atmospheric CO2 concentration using gas emitted by a natural CO2 spring and distributed over a 7m x 7m plot. A similar control plot was established 20m away at near-ambient CO2 concentrations... -
Mineral element status of soils, native pastures and cattle blood serum in the mid-altitude of western Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lemma Gizachew Adane Hirpha Fikadu Jalata G N SmitDespite the crucial role of mineral elements in animal production and health, their status in soil, native pasture and animal body tissues or fluids in the mid-altitude of Ethiopia has had little study. To determine the concentration of mineral elements... -
A comparison of the effects of different rangeland management systems on plant species composition, diversity and vegetation structure in a semi-arid savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Smet D WardMost of South Africa's land surface is arid or semi-arid rangeland. Three management systems exploit these areas: commercial livestock ranching, communal livestock ranching and game ranching. The ways in which these management systems affect rangeland ecology is contentious due to... -
Factors affecting in sacco dietary degradation by Ankole cattle grazing natural range pastures in Uganda
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S Okello EN Sabiiti HJ SchwartzThe in sacco disappearance of dietary dry matter after 48h of incubation in the rumen (DMd) was examined for its relationship with seasonal changes in neutral detergent fibre (NDFd), crude protein (CPd), cellulose (CELL), hemicellulose (HCELL), acid detergent lignin (ADLd)... -
Impact of sustained drought on a semi‐arid Colophospermum mopane savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T.G. O'Connor --- Department of Range and Forage Resources, Republic of South AfricaVegetation change on different substrate types was measured over 15 years in semi‐arid Mopani Veld. Baseline data were collected in the terminal year (1982) of a decade of above‐average rainfall, whilst the period of monitoring was characterised by below‐average rainfall,... -
Phenology of woody plants in riverine thicket and its impact on browse availability to game species
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: BB Janecke --- Animal, Wildlife and Grassland Sciences, South Africa GN Smit --- Animal, Wildlife and Grassland Sciences, South AfricaThe study area was located in the central Free State Grassland biome, but the vegetation partially represented riparian thicket. Leaf carriage patterns of deciduous species were determined from September 2004 to August 2008. Similarities existed between Acacia karroo and Diospyros... -
Climate change perceptions, drought responses and views on carbon farming amongst commercial livestock and game farmers in the semiarid Great Fish River Valley, Eastern Cape province, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: CL Clarke --- Department of Environmental Science, South Africa SE Shackleton --- Department of Environmental Science, South Africa M Powell --- Department of Environmental Science, South AfricaThere is increasing evidence that climate change will be one of the primary challenges facing future development and agriculture. Farmers, whether crop or livestock farmers, will be faced with tradeoffs and constraints as climate change exposes them to greater risk... -
The Effect of Real Price Changes on the Valuation of Timber Plantations
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: H. J.E. Uys --- Department of Forest Science,The well-established method which is applied in South Africa to determine the value of timber plantations ignores real or relative price changes. The omission of real price changes from a plantation valuation can seriously understate or overstate the true value... -
Adjusting Faustmann's formula for the South African forestry environment
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Eksteen Uys --- Department of Forest Science, South AfricaThe forestry industry in South Africa is characterised by frequent changes in land ownership and the valuation of forestry land consequently forms a regular task of forestry valuers. Traditionally the value of bare forestry land was determined by calculating the... -
Challenging the Frontiers of Community Psychology: A South African Experience
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ilse Ruane --- Department of Psycology, South AfricaThe development of community psychology is of vital importance in South Africa because of the historical context, questions about the relevance of mainstream western psychology and the current social change in the country in the post-apartheid era. Accordingly successful community... -
The Impact of Changes in the Work Environment on the Place-Identity of Academics: An Exploratory Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Puleng Segalo --- University of South Africa,The study examined the impact of changes in the work environment on the construction of place-identity among university academics. Data were collected from five academics at a large distance learning university in South Africa. The institution was undergoing major structural... -
Lay Perceptions of Psychotherapists in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Elza Venter --- University of South Africa, Elsabe Roets --- University of South Africa,The study investigated South African layperson perceptions of psychotherapists. Participants were 10 males and 25 females (Whites = 23, Blacks = 10, Coloreds = 2; age range 20 to 59). Semi structured interviews were used to study expectations, attitudes and... -
The State of the Skills Development Expectations and Obligations of Municipal Employees
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bennie J. Linde --- WorkWell Research Unit for Economic and Management Sciences, South Africa Carmen Maritz --- WorkWell Research Unit for Economic and Management Sciences, South AfricaIn this study the psychological contract effects of skills development expectations and obligations of municipal employees in the South African province of the North West were explored. The participants were 547 municipal employees (females = 46%) of all levels. Data... -
Perceived Work Uncertainties and Expectancy-Value as Predictors of Postgraduate Intentions
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sheriffa Mahama --- University of Ghana, Ghana Rainer K. Silbereisen --- Friedrich-Schiller University, Germany Jacquelynne S. Eccles --- University of Michigan,Current globalized labor market trends have been associated with protracted and uncertain work environments for youth and consequently, prolonged periods spent in education. To investigate this association, we assessed work demands which is the perception of growing work-related uncertainties, expectancies,... -
AIDS communications through social networks: catalyst for behaviour changes in Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Daniel Low-Beer RandL StoneburnerObjective: To investigate distinctive communications through social networks which may be associated with population behaviour changes and HIV prevalence declines in Uganda compared to other countries. -
Understanding fatalism in HIV/AIDS protection: the individual in dialogue with contextual factors
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Anna Meyer-WeitzMany people remain at risk of becoming HIV-infected despite large-scale prevention efforts. An exploratory study was conducted to investigate the determinants of a fatalistic attitude towards protecting the self from HIV/AIDS. The study utilised the Human Sciences Research Council's national,... -
Community impact of HIV status disclosure through an integrated community home-based care programme
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Busisiwe Ncama Leana UysThe integration of HIV-prevention activities into care has received little attention within or outside formal healthcare settings. The contribution of community home-based care services in facilitating disclosure of HIV status and reducing stigma have also not been described. This study... -
The influence of peers and other significant persons on sexuality and condom-use among young adults in northern Tanzania
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Bernard Njau Sabina Mtweve Longin Barongo Rachel Manongi Juliet Chugulu Marcelina Msuya Stella Mwampeta Bertha Kiwale Joseph Lekule Hector JalipaSexual behaviour change remains a primary goal of HIV prevention efforts globally. It is a complex issue influenced by numerous unpredictable variables such as individual desires, social and cultural relationships, and environmental and economic dynamics. This study in northern Tanzania... -
HIV/AIDS messages in Malawi and their implications for effective responses
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Vanessa Houston Alice HovorkaThis paper explores the nature of HIV/AIDS education and information networks in Malawi, with a focus on Dedza district. We consider the role of institutional and personal actors involved in Malawi's recently instated and decentralised behaviour-change intervention strategy, as well... -
The effects of gender and socioeconomic status on youth sexual-risknorms: evidence from a poor urban community in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Michael Rogan --- Health Economics and HIV/AIDS Research Division (HEARD), South Africa Michaela Hynie --- Department of Psychology, Canada Marisa Casale --- Health Economics and HIV/AIDS Research Division (HEARD), South Africa Stephanie Nixon --- Department of Physical Therapy, Canada Sarah Flicker --- Faculty of Environment Studies, Canada Geoff Jobson --- Health Economics and HIV/AIDS Research Division (HEARD), South Africa Suraya Dawad --- Health Economics and HIV/AIDS Research Division (HEARD), South AfricaHIV and AIDS remains one of the most serious problems facing youths in many sub-Saharan African countries. Among young people in South Africa, gender is linked with a number of HIV-risk behaviours and outcomes. The literature suggests that factors such... -
Exploring the role of cognitive and structural forms of social capital in HIV/AIDS trends in the Kagera region of Tanzania – a grounded theory study
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Gasto Frumence --- Department of Development Studies, Tanzania Malin Eriksson --- Department of Public Health and Clinical Medicine, Sweden Lennarth Nystrom --- Department of Public Health and Clinical Medicine, Sweden Japhet Killewo --- Department of Biostatistics and Epidemiology, Tanzania Maria Emmelin --- Department of Public Health and Clinical Medicine, SwedenThe article presents a synthesis of data from three village case studies focusing on how structural and cognitive social capital may have influenced the progression of the HIV epidemic in the Kagera region of Tanzania. Grounded theory was used to... -
The rise and fall of HIV prevalence in Zimbabwe: the social, political and economic context
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Stephen O'Brien --- School of Social Science, Australia Alex Broom --- School of Social Science, AustraliaFor more than 10 years Zimbabwe has experienced social, political and economic instability, including the near collapse in 2008 of its health system. Paradoxically, this period has also seen a fall in estimated HIV prevalence, from 25.6% in 1996 to... -
Fear appeals in HIV-prevention messages: young people's perceptions in northern Tanzania
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Sheri Bastien --- Faculty of Medicine, Institute for Basic Medical Sciences, NorwayThe aims of the study were to elicit the perceptions of young people in Tanzania on the role of fear appeals in HIV-prevention messages and to identify important contextual factors that may influence young people's perceptions of HIV-prevention posters. A... -
Obstacles to creating an environment conducive to HIV prevention for young people
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Roselyn Nm Kareithi --- Adolescent Health Research Unit, South Africa Crick Lund --- Department of Psychiatry and Mental Health, Centre for Public Mental Health, South AfricaThe external environment of an organisation influences the desired goals and interventions of that organisation in many ways. However, strategies for influencing the external context to create a more enabling environment for the interventions of non-governmental organisations (NGOs) are often... -
Have the educated changed HIV risk behaviours more in Africa?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Elizabeth Gummerson --- Centre for Social Science Research, Leslie Social Sciences Building, South AfricaTheory predicts that when new health information becomes available, more educated individuals may adopt healthy behaviours sooner, resulting in lower morbidity and mortality among the highly educated. This may be the case for HIV in sub-Saharan Africa: Recent empirical work... -
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... -
Relationship between water temperature predictability and aquatic macroinvertebrate assemblages in two South African streams
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BR Eady --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South Africa NA Rivers-Moore --- Centre for Water Resources Research, South Africa TR Hill --- Discipline of Geography, School of Agricultural, Earth and Environmental Sciences, South AfricaVariable seasonal stream temperatures are a critical factor in maintaining aquatic invertebrate community patterns. We investigated whether the degree of predictability in a stream's water temperature profile provides insights into the structure and functional predictability of macroinvertebrate communities. Quarterly macroinvertebrate... -
Variations and changes in habitat, productivity, composition of aquatic biota and fisheries of the Kyoga lake system: lessons for management
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Ogutu-Ohwayo --- National Fisheries Resources Research Institute, Uganda K Odongkara --- National Fisheries Resources Research Institute, Uganda W Okello --- National Fisheries Resources Research Institute, Uganda D Mbabazi --- National Fisheries Resources Research Institute, Uganda SB Wandera --- National Fisheries Resources Research Institute, Uganda LM Ndawula --- National Fisheries Resources Research Institute, Uganda V Natugonza --- National Fisheries Resources Research Institute, UgandaThe Kyoga lake system, which is c. 4 m deep, originally had a diverse fish fauna, extensive macrophytes and wetlands. Most (82%) of its water comes from Lake Victoria, is controlled through three dams and has a short residence time... -
Ostrich recruitment dynamics in relation to rainfall in the Mara–Serengeti ecosystem
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: JosephO Ogutu --- Institute of Crop Science, Germany Hans-Peter Piepho --- Institute of Crop Science, Germany HollyT Dublin --- Species Survival Commission, International Union for Conservation of Nature and Natural Resources, c/o Centre for Biodiversity Conservation, South AfricaAnimal population dynamics can be driven by rainfall variability through its influence on habitat suitability, availability and nutritional sufficiency of forage. To understand how rainfall influences ostriches, we related changes in ostrich recruitment in the Mara–Serengeti ecosystem to rainfall. Over... -
Diurnal patterns of mass gain in tropical granivores suggest avoidance of high midday temperatures during foraging, rather than the starvation–predation risk trade-off
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Shiiwua Manu --- AP Leventis Ornithological Research Institute, Nigeria Will Cresswell --- School of Biology, UKDiurnal patterns of body mass gain in small temperate birds are of theoretical interest because they are largely a consequence of the starvation vs predation risk trade-off. In tropical birds, diurnal variation in body mass may also be influenced by... -
A Statistical Model for Stock Assessment of Southern Bluefin Tuna with Temporal Changes in Selectivity
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D. S. Butterworth J. N. Ianelli R. HilbornAssessment of the status of southern bluefin tuna (SBT) by Australia and Japan has used a method (ADAPT) that imposes a number of structural restrictions, and is similar to methods used for a number of stocks world-wide. A flexible method... -
Changes in the epibenthos of Saldanha Bay, South Africa, between the 1960s and 2001: an analysis based on dredge samples
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Kruger GM Branch CL Griffiths JG FieldSaldanha Bay, which lies on the south-west coast of South Africa, has undergone major development over the past 30 years, including breakwater and harbour construction, harbour extension, dredging, mining, fishing, fish processing and mussel culture. This study examines whether the... -
The 26 December 2004 Sumatra tsunami recorded on the coast of West Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Joseph JT Odametey EK Nkebi A Pereira RG Prabhudesai P Mehra AB Rabinovich V Kumar S Prabhu-Desai P WoodworthAnalysis of sea-level data obtained from the Atlantic Global Sea Level Observing System (GLOSS) sea-level station at Takoradi, Ghana, West Africa, clearly reveals a tsunami signal associated with the Mw = 9.3 Sumatra earthquake of 26 December 2004 in the... -
A spatial- and age-structured assessment model to estimate the impact of illegal fishing and ecosystem change on the South African abalone Haliotis midae resource
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ÉE Plagányi --- Department of Mathematics and Applied Mathematics, South Africa DS Butterworth --- Department of Mathematics and Applied Mathematics, South AfricaThe management of abalone stocks worldwide is complicated by factors such as illegal fishing combined with the difficulties of assessing a sedentary (but not immobile) resource that is often patchily distributed. The South African abalone Haliotis midae fishery is faced... -
Coastal oceanic climate change and variability from 1982 to 2009 around South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Rouault --- Department of Oceanography, Marine Research Institute, South Africa B Pohl --- Centre de Recherches de Climatologie, France P Penven --- , FranceChanges and fluctuations in sea surface temperature (SST) around the South African coast are analysed at a monthly scale from 1982 to 2009. There is a statistically significant negative trend of up to 0.5 °C per decade in the southern... -
Cross-shelf observations of diet and diel feeding behaviour of the bearded goby Sufflogobius bibarbatus off Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Hundt --- Department of Biology, Norway AC Utne-Palm --- Department of Biology, Norway MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaThe diet of the bearded goby Sufflogobius bibarbatus was studied at two 48 h stations off the Namibian coast. The inner station (120 m) was characterised by a deep layer of low-oxygen bottom water (<0.5 ml DO l−1 or <10%... -
Changes in demersal fish assemblages on the west coast of South Africa, 1986–2009
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LJ Atkinson --- , South Africa RW Leslie --- Fisheries Branch, Department of Agriculture, South Africa JG Field --- , South Africa A Jarre --- , South AfricaResearch survey data collected over 24 years (1986–2009) were used to explore long-term changes in demersal fish assemblages on the west coast of South Africa. Differences in spatial (latitude and depth) and temporal (seasonal and annual) factors were examined using... -
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... -
Temporal variability of a temperate fish assemblage in Africa's oldest marine protected area
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NC James --- , South Africa A Götz --- Elwandle Node, South African Environmental Observation Network (SAEON), South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South Africa PD Cowley --- , South AfricaA standardised research-based, shore-angling survey was conducted in the 47-year-old Tsitsikamma National Park Marine Protected Area (MPA) between 1998 and 2005. The aim of this study was to examine variability in community structure, relative abundance (catch per unit effort, CPUE)... -
South African kelp moving eastwards: the discovery of Ecklonia maxima (Osbeck) Papenfuss at De Hoop Nature Reserve on the south coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JJ Bolton --- Botany Department and Marine Research Institute, South Africa RJ Anderson --- Botany Department and Marine Research Institute, South Africa AJ Smit --- School of Biological and Conservation Sciences, Faculty of Science, South Africa MD Rothman --- Botany Department and Marine Research Institute, South AfricaHistorical and recent evidence is documented to demonstrate that the eastern limit of the major kelp-bed forming seaweed Ecklonia maxima has moved c. 73 km eastward along the south coast of South Africa since 2006, after remaining unchanged for almost... -
Variability in estuarine water temperature gradients and influence on the distribution of zooplankton: a biogeographical perspective
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TH Wooldridge --- Department of Zoology, South Africa SHP Deyzel --- , South AfricaStructure and variability of water temperature gradients and potential influence on distribution of two tropical zooplankters (the mysid Mesopodopsis africana and the copepod Acartia natalensis) and their temperate congenerics (M. wooldridgei and A. longipatella) was investigated over a 10-year period... -
St Helena Bay (southern Benguela) then and now: muted climate signals, large human impact
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Hutchings --- Department of Environmental Affairs, South Africa A Jarre --- Marine Research (MA-RE) Institute, South Africa T Lamont --- Department of Environmental Affairs, South Africa M van den Berg --- Department of Environmental Affairs, South Africa SP Kirkman --- Department of Environmental Affairs, South AfricaThe development of suitable reference states for ecosystem-based management requires documentation of changes in structure and functioning of marine ecosystems, including assessment of the relative importance of bottom-up and top-down processes as drivers of change. We used monitoring data available... -
Human-mediated drivers of change — impacts on coastal ecosystems and marine biota of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Mead --- Centre for Invasion Biology, South Africa C L Griffiths --- Centre for Invasion Biology, South Africa G M Branch --- Department of Biological Sciences, South Africa C D McQuaid --- Department of Zoology and Entomology, South Africa L K Blamey --- Department of Biological Sciences, South Africa J J Bolton --- Department of Biological Sciences, South Africa R J Anderson --- Department of Biological Sciences, South Africa F Dufois --- Marine Research Institute, South Africa M Rouault --- Marine Research Institute, South Africa P W Froneman --- Department of Zoology and Entomology, South Africa A K Whitfield --- South African Institute for Aquatic Biodiversity, South Africa L R Harris --- Department of Zoology, South Africa R Nel --- Department of Zoology, South Africa D Pillay --- Department of Biological Sciences, South Africa J B Adams --- Department of Botany, South AfricaCoastal ecosystems are highly vulnerable to human-mediated drivers of global change because they are located at the land–ocean interface and often host centres of urbanisation and development. The South African coastline comprises several distinct coastal ecoregions that support a wide... -
Reviewing evidence of marine ecosystem change off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C L Moloney --- Department of Biological Sciences, South Africa S T Fennessy --- Oceanographic Research Institute, South Africa M J Gibbons --- Department of Biodiversity and Conservation Biology, South Africa A Roychoudhury --- Department of Earth Sciences, South Africa F A Shillington --- Marine Research Institute, South Africa B P von der Heyden --- Department of Earth Sciences, South Africa K Watermeyer --- Department of Biological Sciences, South AfricaRecent changes have been observed in South African marine ecosystems. The main pressures on these ecosystems are fishing, climate change, pollution, ocean acidification and mining. The best long-term datasets are for trends in fishing pressures but there are many gaps,... -
Relations Key to Innovations – Peasants, Institutions and Technical Change on the Mossi Plateau in Burkina Faso
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mats Hårsmar --- , SwedenHow can technical changes within food crop cultivation in a country like Burkina Faso be explained? This is an important question for the reduction of poverty, for enhanced food security as well as for economic growth. Poor countries, where agriculture... -
Agriculture and Climate Change in Cameroon: An Assessment of Impacts and Adaptation Options
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yong D. Ngondjeb --- , CameroonThis study aims to assess the economic impact of climate change on crop farming activities in the Sudano-Sahelian Area of Cameroon. The study uses the Ricardian model and is based on farm data generated from a survey carried out in... -
Studying Issues Related to Industry and Technology: A Journey into Interdisciplinarity
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Manik Kher [d858024e18]No research can be perfect without an interdisciplinary approach, especially in studies related to industry, which is the most dynamic of all societal aspects. Industry is sensitive to socio-economic and political scenarios. The legal system also is not free from... -
A Conceptual Framework for Implementing Sustainable Livelihoods and Innovation in Biofuel Production among Smallholder Farmers
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chipo Nyamwena-Mukonza --- , South AfricaThere has been renewed interest in biofuel production globally as a response to the continuous increase in oil prices, the depletion of fossil fuels and as nations move towards a low carbon economy. The paper is a work in progress... -
A Rapid Solar Transition is not only Possible, it is Imperative!
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: David Schwartzman --- Department of Biology, USA Peter Schwartzman --- Department of Environmental Studies, USACatastrophic climate change (C3) is inevitable if carbon emissions to the atmosphere are not rapidly reduced and the now unsafe atmospheric level (400 ppm) CO2 (and rising) is not brought down by sequestration technologies to below 350 ppm. C3 prevention is possible... -
Lasiodiplodia species associated with dying Euphorbia ingens in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JA van der Linde --- Department of Microbiology and Plant Pathology, DST/NRF Centre of Excellence in Tree Health Biotechnology, Forestry and Agricultural Biotechnology Institute, South Africa DL Six --- College of Forestry and Conservation, Department of Ecosystem and Conservation Sciences, USA MJ Wingfield --- Department of Microbiology and Plant Pathology, DST/NRF Centre of Excellence in Tree Health Biotechnology, Forestry and Agricultural Biotechnology Institute, South Africa J Roux --- Department of Microbiology and Plant Pathology, DST/NRF Centre of Excellence in Tree Health Biotechnology, Forestry and Agricultural Biotechnology Institute, South AfricaVarious species of Euphorbia occur in South Africa, including herbaceous, succulent and woody types. The largest of the succulent Euphorbia spp. in South Africa is Euphorbia ingens. These trees have been dying at an alarming rate in the Limpopo province... -
Nutrient fluxes in rainfall, throughfall and stemflow in Eucalyptus stands on the Zululand coastal plain, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: SB Dovey --- , South Africa B du Toit --- Department of Forest and Wood Science, South Africa W de Clercq --- Department of Soil Science, South AfricaAtmospheric deposition was assessed at two sites over a four-year period in post-canopy-closure (mature) Eucalyptus stands in the northern Dukuduku and southern KwaMbonambi commercial plantation forestry areas of Zululand, South Africa. The aim of this study was to determine the... -
The strategic importance of applied tree conservation programs to the forest industry in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: WS Dvorak --- College of Natural Resources, Department of Forestry and Environmental Resources, USABecause of anticipated adverse climatic change and resulting increases in disease and insect attacks in forest plantations in the future, forest industries must maintain broad genetic bases for adaptability and pest resistance. Since the early 1980s, the South African forest... -
Early growth results of three Eucalyptus grandis × Eucalyptus nitens hybrid clonal trials and their response to snow events
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Iain M Thompson --- Forest Technology Services, South AfricaEucalyptus grandis × Eucalyptus nitens (G×N) hybrid clones are selected to combine complimentary characteristics of E. nitens and E. grandis. G×N hybrid clones also have the potential to increase growth rates and provide adaptability to a changing climate. A series... -
Building partnerships to support community-led HIV/AIDS management: a case study from rural South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Yugi Nair Catherine CampbellThe importance of partnerships between marginalised communities and support agencies (from the public sector, private sector and civil society) is a pillar of HIV/AIDS management policy. Such alliances are notoriously difficult to promote and sustain. We present a case study... -
Sexual activity and condom use among people living with HIV in Swaziland
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: AgostinoM ZamberiaA number of studies have shown strong evidence of the association between HIV testing and an increase in consistent condom use. These studies have shown that HIV testing has contributed to a reduction in risk behaviours, since knowledge of HIV... -
Temporal trends in total phosphorus, temperature, oxygen, chlorophyll a and phytoplankton populations in Hartbeespoort Dam and Roodeplaat Dam, South Africa, between 1980 and 2000
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CarinE van Ginkel MichaelJ SilberbauerEutrophication, phytoplankton blooms and changes to the phytoplankton composition are some of the problems facing the managers of Hartbeespoort Dam and Roodeplaat Dam. Trends, both decreasing and increasing, are visible in the phosphorus concentrations, temperatures, dissolved oxygen concentrations and chlorophyll... -
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... -
Mass on arrival of rockhopper penguins at Marion Island correlated with breeding success
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford AB Makhado L Upfold BM DyerFor rockhopper penguins Eudyptes chrysocome at Marion Island, there were significant decreases over time in the numbers breeding and breeding success at three monitored colonies from 1985/1986 to 2006/2007, and in mass on arrival for breeding of both males and... -
Recent distributional changes of seabirds in South Africa: is climate having an impact?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford AJ Tree PA Whittington J Visagie L Upfold KJ Roxburg AP Martin BM DyerThere have been recent changes in the distributions of several seabirds in South Africa. In the mid-1990s, breeding of Leach's storm petrel Oceanodroma leucorhoa was recorded in the Western Cape, the first record for the Southern Hemisphere. There was a... -
Variation in population structure and life-history parameters of steentjies Spondyliosoma emarginatum: effects of exploitation and biogeography
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KL Tunley --- Marine Research Institute and Department of Zoology, South Africa CG Attwood --- Marine Research Institute and Department of Zoology, South Africa CL Moloney --- Marine Research Institute and Department of Zoology, South Africa L Fairhurst --- , South AfricaThe size and age structures, sex ratio, size- and age-at-sex-change, growth and mortality rate of the protogynous hermaphrodite, steentjie Spondyliosoma emarginatum, were compared to determine the effects on population structure and life-history parameters of exploitation (comparing an unexploited reserve and... -
Climate change and desertification in South Africa—science and response
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: ERM Archer --- Climate Change, South Africa MA Tadross --- Climate Systems Analysis Group, South AfricaDespite significant attention paid to desertification and climate change in the last few decades, interactions between the phenomena, as well as implications thereof, have received less of a focus. Such a trend is particularly marked in the science– policy arena,... -
The impact of indigenous ungulate herbivory over five years (2004–2008) on the vegetation of the Little Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MT Hoffman --- Plant Conservation Unit, Botany Department, South Africa CF Madden --- Plant Conservation Unit, Botany Department, South Africa K Erasmus --- Sanbona Wildlife Reserve, South Africa N Saayman --- Department of Agriculture: Western Cape, South Africa JC Botha --- Department of Agriculture: Western Cape, South AfricaThis study investigated the impact of rainfall and herbivory by indigenous herbivores over five years (2004–2008) on the vegetation of the Sanbona Wildlife Reserve (SWR), a 54 000 ha privately owned conservation area in the Little Karoo. Changes in floristic... -
Restoring bare patches in the Nama-Karoo of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: N Visser C Morris MB Hardy JC BothaOften veld degrades to a point beyond which vegetation cover, plant density and species composition do not recover despite the removal of the grazing impact. In such cases restoration interventions become necessary to assist with the re-establishment of vegetation. The... -
Water location, piospheres and a review of evolution in African ruminants
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JF Derry AJ DougillThe main radiation of large mammalian herbivores in Africa took place in the Pliocene–Pleistocene, when a long-term trend towards aridification promoted grasslands and the diversification of ruminant grazers. Traditional models of this evolution identify habitat fragmentation in response to climate... -
Potential impacts of climate change on the climatically suitable growth areas of Pinus and Eucalyptus: results from a sensitivity study in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: ML Warburton RE SchulzeGlobal average surface temperature has increased by approximately 0.74 °C over the most recent 100-year period. At a regional level in South Africa, detectable changes in both the rainfall and temperature patterns have occurred in the past 50 years. Climate... -
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... -
Responses of the Serengeti avifauna to long-term change in the environment
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Anthony RE Sinclair --- Beaty Biodiversity Research Centre, Canada Ally Nkwabi --- Serengeti Biodiversity Program, Tanzania Simon AR Mduma --- Beaty Biodiversity Research Centre, Canada Flora Magige --- Department of Zoology and Wildlife Conservation, TanzaniaIn this paper we examine how climate change interacts with other disturbances to alter the functioning of a tropical ecosystem, the Serengeti in Tanzania. Tropical Africa has increasing temperatures and changes in rainfall. Long-term data have shown how the avifauna... -
Water temperature affects life-cycle duration of tadpoles of Natal cascade frog
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- Centre for Water Resources Research, South Africa RJ Karssing --- Ezemvelo KZN Wildlife, South AfricaDirect and indirect effects of climate change on amphibians include range shifts and changes in community structure. The Natal cascade frog Hadromophryne natalensis has an altitudinal range of some 2 400 m in KwaZulu-Natal, and presents an opportunity to assess... -
The impact of land use on woody plant cover and species composition on the Grahamstown municipal commonage: implications for South Africa's land reform programme
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: James R Puttick --- Plant Conservation Unit, Department of Biological Sciences, South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South Africa James Gambiza --- Department of Environmental Science, South AfricaUsing an analysis of aerial photographs from 1942, 1985 and 2004 we assessed the impact of changing land tenure and land-use regimes on the cover of thicket vegetation on the Grahamstown commonage. Land-use impacts were examined by comparing plant species... -
A century of woody plant encroachment in the dry Kimberley savanna of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: David Ward --- School of Life Sciences, South Africa M Timm Hoffman --- Plant Conservation Unit, Botany Department, South Africa Sarah J Collocott --- School of Life Sciences, South AfricaWoody plant encroachment is frequent in dry savannas. Grazing is often considered to be a major cause of encroachment in dry savannas because grasses are removed by livestock, leaving bare areas for trees to colonise in wetter years. Earlier experiments... -
Obesity and dietary behavioural changes
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: G Jardine --- Registered dietitian in private practice,Obesity is a multifactorial condition involving genetic, environmental and behavioural factors. For most people wanting to lose weight, little can be done to alter genetics or their environment. What is generally required is a change in behaviour that will result... -
Observational study of choice of anaesthesia and outcome in patients with severe pre-eclampsia who present for emergency Caesarean section
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: K Keerath --- King Edward VIII Hospital, L Cronje --- King Edward VIII Hospital,Objectives: Recent evidence in the literature suggests that regional anaesthesia may be the preferred choice over general anaesthesia for patients with severe pre-eclampsia who present for a Caesarean section. This study was conducted to determine if this applied to our... -
Managing chronic conditions in a South African primary care context: exploring the applicability of Brief Motivational Interviewing
Item type: Journal Article • Journal: South African Family Practice • Authors: RJ Mash --- Department of Family Medicine and Primary Care, S Allen --- Child, Youth & Family Development,Background: Brief Motivational Interviewing (BMI) is an approach to motivating behaviour change in general health care settings. The relevance and applicability of BMI has not been fully assessed in low- or middle-income country settings. This study explored the application of... -
Unveiling the physical therapies
Item type: Journal Article • Journal: South African Family Practice • Authors: L Alford --- School of Allied Health Professions, University of East Anglia, United KingdomEither through referral by a medical practitioner or self-referral many patients with musculoskeletal problems receive some form of physical therapy. There are several highly trained professional groups who deliver this treatment. Due to lack of regulation, however, there are also... -
Chronic diseases, climate change and complexity: the hidden connections
Item type: Journal Article • Journal: South African Family Practice • Authors: R Mash --- Division of Family Medicine and Primary Care, South AfricaIn this paper the argument is presented that we can expect an increase in chronic diseases within developing countries such as South Africa and that this is largely due to changes in lifestyle, such as diet and exercise. While these... -
Lifestyle changes for hypertension
Item type: Journal Article • Journal: South African Family Practice • Authors: V Mungal-Singh --- Heart and Stroke Foundation South Africa, -
Geology and groundwater regions to quantify primary salinity, sodicity and alkalinity in South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johannes P Nell --- Agricultural Research Council–Institute for Soil, Climate and Water, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Science, South AfricaAlthough anthropogenic salinisation and sodification has been researched extensively, little is known about the primary salinity in South Africa. This paper therefore aimed to determine the primary salinity, sodicity and alkalinity conditions for South African soils, based on geological units... -
Understanding the combined effect of soil properties on gully erosion using quantile regression
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: George M van Zijl --- Department of Soil Science, South Africa Freddie Ellis --- Department of Soil Science, South Africa Andrei Rozanov --- Department of Soil Science, South AfricaThe individual effects of soil properties on soil erodibility are well understood. It is also known that various interactions between these properties exist, which creates the need for unique investigations into how soil properties influence soil stability. Quantile regression was... -
On law and legality in post-apartheid South Africa: insights from a migrant street trader
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Jürgen Schraten --- The Human Economy Project, Faculty of Humanities, South AfricaThis article focuses on the experience of law and legality by a migrant street trader in post-apartheid South Africa. The experiences of this stall vendor are analysed alongside theoretical notions of law and the legal system. The ways that law... -
Institutions and social change: a case study of the South African National AIDS Council
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Theodore Powers --- The Human Economy Project, Faculty of Humanities, South AfricaInstitutions play an important role in the success or failure of social models, as they promote or limit particular political and economic activities. Central to this point is the understanding that institutions and traditions are in a constant state of... -
Towards a human economy: reflections on a new project
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: John Sharp --- Department of Anthropology and Archaeology, South AfricaThe University of Pretoria's Human Economy project began at the end of 2010. To date it has involved eighteen post-doctoral fellows, drawn from around the world, and eight doctoral candidates, all from Africa. This paper reviews the project's progress, drawing... -
Planned intervention and organisational development: the role of leadership in change initiatives
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Victor E. Dike --- National University,Every system - organisation or human being - has the tendency of striving to change for the better. Although the process can be planned or unplanned, it involves continuous adjustment to a new environment. This paper focuses on the role... -
Repeat photography as a tool for detecting and monitoring historical changes in South African coastal habitats
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Reimers --- Centre for Invasion Biology and Department of Biological Sciences, South Africa CL Griffiths --- Centre for Invasion Biology and Department of Biological Sciences, South Africa MT Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South AfricaRepeat photography was used to illustrate long-term changes occurring in coastal habitats in the Western Cape, South Africa. Historic images were sourced from books and theses, the public and subject specialists, and repeat photographs were then taken from the same... -
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... -
Adopting latecomers' strategies for the development of renewable energy technology in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria Oluwatosin G Oladipo --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria Ibikunle O Ogundari --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, Nigeria O Titilayo Aladesanmi --- National Centre for Technology Management, Federal Ministry of Science and Technology, Obafemi Awolowo University, NigeriaThe overall objective of this paper is to develop strategies on how renewable energy technology could be used to abate climate change impacts in Africa. While assessing the potential impacts of climate change in Africa, the paper asserts that renewable... -
Optimising drought adaptation by small-scale farmers in southern Africa through integration of indigenous and technologically-driven practices
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Rudzani A. Makhado --- Unit Manager, Research & Evaluation Section, South Africa Amani T. Saidi --- Stakeholder Manager, South African Environmental Observation Network, South Africa Phumudzo P. Tshikhudo --- Scientist, Plant Health Directorate, Department of Agriculture, South AfricaThis paper reviews and synthesises research-based literature on drought adaptation practices among small-scale farmers in southern Africa. The paper reviews the existing literature in order to identify ways in which small-scale poor farmers in southern Africa adapt to the effects... -
Growth and structural change in Africa: development strategies for the learning economy
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bengt-Åke Lundvall --- Department of Management and Business Studies, Denmark Rasmus Lema --- Department of Management and Business Studies, DenmarkThis paper discusses opportunities and policy options for African countries seeking innovation and learning based development strategies. What kind of policies and institutions are necessary in order to transform the current increase in rents from commodities exports into industrial investment... -
Foreign direct investment and local technological capabilities in least developed countries: some evidence from the Tanzanian manufacturing sector
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bitrina Diyamett --- Science, Technology and Innovation Policy Research Organisation (STIPRO), Tanzania Musambya Mutambla --- Science, Technology and Innovation Policy Research Organisation (STIPRO), TanzaniaForeign direct investment has been found to be one of the very important ways of building local technological capabilities for developing countries, and an important channel through which international diffusion of knowledge and technology takes place. While this has been... -
The state and innovation policy in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Banji Oyelaran-Oyeyinka --- UN-HABITAT, Nairobi. Kenya and UNU-MERIT, The NetherlandsThis paper examines the role of African states in the process of industrialisation. It sets out to examine the nexus of state capacity, innovation policy and the dynamics of development. The methodology is largely qualitative through which a historical narrative... -
Bird diversity and land use on the slopes of Mt Kilimanjaro and the adjacent plains, Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: Eija Soini --- World Agroforestry Centre (ICRAF), KenyaThis study of bird distribution in the main land-use categories of the slopes of Mt Kilimanjaro, Tanzania, aims at understanding potential impacts of the land-use changes on birds. A land-use map of the study area was derived from a Landsat... -
Decline of large mammals in the Katavi-Rukwa ecosystem of western Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: Tim Caro --- Department of Wildlife, Fish and Conservation Biology, U.S.A.In the Katavi-Rukwa ecosystem of western Tanzania, aerial censuses carried out between 1988 and 2002 show that populations of several large ungulate species had declined. Five competing factors that could be responsible for these changes were investigated. (i) Rainfall increased... -
Macrofaunal community structure in the littoral zone of a freshwater-deprived, permanently open Eastern Cape estuary
Item type: Journal Article • Journal: African Zoology • Authors: T.O. Henninger --- Department of Zoology and Entomology, South Africa P.W. Froneman --- Department of Zoology and Entomology, South AfricaSpatial patterns in the macrofauna community structure within four distinct zones of the permanently open, freshwater-deprived Kariega Estuary on the southeastern coastline of southern Africa were investigated in March–May 2010. The zones within the littoral zone comprised a band of... -
Integrating research with management: the case of Katavi National Park, Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: T. Caro --- Department of Wildlife, Fish and Conservation Biology, U.S.A. M. Elisa --- Katavi National Park, Tanzania J. Gara --- Katavi National Park, Tanzania D. Kadomo --- Katavi National Park, Tanzania A. Martin --- Department of Wildlife, Fish and Conservation Biology, U.S.A. D. Mushi --- Katavi National Park, Tanzania C. Timbuka --- Katavi National Park, TanzaniaMany protected areas in Africa and elsewhere suffer from several external pressures making it difficult for management to set priorities. For example, aerial censuses show that many mammal populations in the Katavi-Rukwa ecosystem of western Tanzania are declining. Vehicle transect... -
High population connectivity and Pleistocene range expansion in the direct-developing plough shell Bullia rhodostoma along the South African coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Muteveri --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa CA Matthee --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa RCK Bowie --- Museum of Vertebrate Zoology and Department of Integrative Biology, USA S von der Heyden --- Evolutionary Genomics Group, Department of Botany and Zoology, South AfricaPleistocene climatic and oceanographic changes have influenced the distribution of marine biodiversity in southern Africa. Most evidence, however, has been derived from rocky shore or demersal taxa; data on sandy shore species are limited, despite severe threats to many sandy... -
Can behaviour buffer the impacts of climate change on an arid-zone bird?
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Susan J Cunningham --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Rowan O Martin --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaBehavioural thermoregulation, particularly the use of cool microclimates, is one method by which organisms could avoid the worst effects of climate warming. However, retreat into cool microsites, e.g. shady vegetation or burrows, may carry important lost-opportunity costs. These could include... -
Elevated temperatures drive fine-scale patterns of habitat use in a savanna bird community
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Rowan O Martin --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Susan J Cunningham --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- ,Many animals use thermally buffered microhabitats, e.g. patches of shade within trees, to avoid temperature extremes. These ‘thermal refugia’ may mediate the impact of climate change on animals. Predicting how species and communities will respond to rising temperatures therefore requires... -
The interstices of hospitality
Item type: Journal Article • Journal: • Authors: Luiz Octávio de Lima Camargo --- School of Hospitality and Tourism, Anhembi Morumbi University, São Paulo, BrazilThis paper is a review of previous works, and it shows the notion of hospitality situated at the confluence of the concepts of interpersonal relationships, virtue, rites and commercial/non-commercial exchange. In doing so it discusses the most significant authors who... -
Mangrove expansion and population structure at a planted site, East London, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sabine CL Hoppe-Speer --- Department of Botany, South Africa Janine B Adams --- Department of Botany, South Africa Anusha Rajkaran --- Department of Botany, South AfricaAvicennia marina (Forrsk.) Vierh. was planted in 1969 at Nahoon Estuary, East London, followed a few years later by the planting of Bruguiera gymnorrhiza (L.) Lam. and Rhizophora mucronata (L.) among the larger A. marina trees. This study tested the... -
Assessment of the effects of climate change on the performance of pavement subgrade
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: M.B. Mndawe --- Department of Civil Engineering, South Africa J.M. Ndambuki --- Department of Civil Engineering, South Africa W.K. Kupolati --- Department of Civil Engineering, South Africa A.A. Badejo --- Department of Civil Engineering, South Africa R. Dunbar --- Royal Haskoning DHV, South AfricaThis research investigated the effects of future climate change on pavement life in South Africa by simulating prolonged moisture presence in the pavement subgrade. The study was conducted on roads P435 and P443 within uMkhanyakude District Municipality. Climatic data were... -
The realignment of international stock markets after the 1987 crash, with special reference to the Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: G D I Barr --- Department of Statistical Science, L Sharp --- Department of Economics,This paper investigates stock price associations between the world’s sixteen largest international markets in the period immediately before and after the 1987 market crash, as well as in a more recent post-crash period. The analysis suggests that the crash had... -
Employing the prespecified variable approach to APT factor identification on the segmented Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Paul van Rensburg --- Department of Accounting and Finance,Prior research has provided evidence that the return generating process on the Johannesburg Stock Exchange (JSE) is dichotomous in nature (Campbell, 1979; Gilbertson and Goldberg, 1981;Carter, 1983; Page, 1986, 1989; Venter, Bradfield and Bowie, 1992). More specifically, this prior work... -
Unifying the factor analytic and prespecified variable approaches to APT factor identification on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: P van Rensburg --- Department of Accounting and Finance,This paper reviews recent empirical work concerning the number and macroeconomic nature of the priced Arbitrage Pricing Theory (APT) factors on the Johannesburg Stock Exchange (JSE). As a consolidation of prior factor analytic and prespecified variable findings, a brief empirical... -
Price earnings ratios on the Johannesburg Stock Exchange - Are they a guide to value?
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: G D I Barr --- Department of Statistical Science and Economics, B S Kantor --- Department of Economics,This paper tests whether there is an equilibrium relationship between prices and earnings on the Johannesburg Stock Exchange (JSE). Such a relationship would hold if the JSE Index and index earnings were cointegrated, A full explanation of the technique of... -
Uncertainty, cost of capital and financial disclosure: A review of the theory and some evidence
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: M Negash --- University of the Witwatersrand,This paper contains a critical review of the uncertainty research, and reports on the relationship between corporate disclosure and the adverse selection component of the buy-sell (bid-ask) spread of stock prices. Order processing and holding costs will be decoupled from... -
The effect on taxpayers of new tax legislation regarding foreign exchange transactions
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: R Oberholzer --- Department of Taxation, J S Wilcocks --- School of Applied Accountancy,Numerous problems have been encountered with the practical application of the new taxation legislation relating to foreign currency transactions. The purpose of this paper is to analyse the amendments relating to foreign exchange transactions and to illustrate, by using examples,... -
Predictors of management accounting change in South Africa: Evidence from five retail companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: N M Waweru --- Department of Accounting, E Uliana --- Department of Accounting,There is limited knowledge of management accounting practices and change in developing countries. This paper explores the processes of management accounting change in five South African retail companies by means of case studies. A number of factors have been identified... -
An analysis of underpricing and aftermarket performance of initial public offerings on the Alternative Exchange (AltX)
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: C. Correia --- Department of Accounting, G. Holman --- Department of Accounting,This paper reviews the international evidence of underpricing of Initial Public Offerings and analyses IPO underpricing by companies listing on the South African Alternative Exchange (AltX). Underpricing is indicated by measuring the percentage difference between the initial offer price and... -
Do dividends matter? Some evidence from an emerging market
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: N M Waweru --- School of Administrative Studies,This study investigated the information content theory of dividends in the Kenyan Stock market. Data was obtained from the Nairobi Stock Exchange (NSE) hand book for the period 2001–2007. Using regression analysis, the study attempted to determine the factors that... -
The relative tracking ability of South African exchange traded funds and index funds
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Barry Strydom --- School of Accounting, Economics and Finance, Pietermaritzburg Campus, South Africa Ailie Charteris --- School of Accounting, Economics and Finance, Pietermaritzburg Campus, South Africa Kerry McCullough --- School of Accounting, Economics and Finance, Pietermaritzburg Campus, South AfricaThe Efficient Market Hypothesis holds that it is not possible to ‘beat the market’ and that a passive investment strategy is optimal. Traditionally investors have been able to do this by investing in index funds replicating an index, but the... -
Basic Financial Statements: Objectives, Categories, Principles and Presentation
Item type: Journal Article • Journal: De Ratione • Authors: J.A. Miller --- University of Natal,Objectives ae suggested for each of the basic financial statements in the annual report of a business entity. Categories of information required and the principles used in their classification, are identified and defined. A suggested presentation reflects cash flow alongside... -
A review of capital market theory from a South African Perspective
Item type: Journal Article • Journal: De Ratione • Authors: D.J. Bradfield --- University of Cape Town,The vast quantity of finance literature dealing with Capital Market Theory on the New York Stock Exchange (NYSE) is evidence of the demand for research in this area. Until very recently, almost no research In this area has been conducted... -
Insider dealing in South Africa – the criminal aspects
Item type: Journal Article • Journal: De Ratione • Authors: R.D Jooste --- University of Cape Town,The new criminal provisions aimed at the regulation of insider dealing In South Africa, although an improvement on the old, are of dubious merit, This article purports to show how the Legislature, through suspect draftmanship, conceptual deficiencies and an over-generous... -
Insider dealing in South Africa – the civil aspects
Item type: Journal Article • Journal: De Ratione • Authors: R.D. Jooste --- University of Cape Town,What are the civil consequence of insider dealing? is civil action a reality? This article examines these issues in the light of recent legislative amendments and attempts to show that, in most instances, neither the common law nor the new... -
A review of the efficiency of the Johannesburg Stock Exchange
Item type: Journal Article • Journal: De Ratione • Authors: Narendra Bhana --- Graduate School of Business University of Durban-Westville Private Bag,In recent years there has been considerable evidence which contradicts the efficient market hypothesis. This evidence is reviewed with particular attention to the JSE, The efficiency of the JSE is evaluated by using an efficiency scale which ranges from perfect... -
Macroeconomic variables and the Johannesburg Stock Exchange: A multifactor approach
Item type: Journal Article • Journal: De Ratione • Authors: Paul Van Rensburg --- Department of Accounting,This study estimates the simultaneous relationship between a number of selected macroeconomic variables and share prices on the Johannesburg Stock Exchange (JSE). A linear factor model identical in form to that assumed by the arbitrage pricing theory (APT) is estimated... -
The accounting function of John Company’s Cape of Good Hope factory 1812–1813, during the second British occupation of the Cape colony – observations and comments
Item type: Journal Article • Journal: De Ratione • Authors: J G Samkin --- Department of Accountancy,This paper reviews and makes observations on the accounting functions of the Cape of Good Hope factory of the English East India Company during the period 1812–1813. In particular, the accounting records maintained by the Cape factory are examined. By... -
Imagine staying in a Shanghai hotel bedroom in 2050?
Item type: Journal Article • Journal: • Authors: Tan Li Yu Rebecca --- Victoria Management School, PO Box 600, Wellington 6135, New Zealand Ian Yeoman --- Victoria Management School, PO Box 600, Wellington 6135, New ZealandWill the future hotels of Shanghai emphasise a world of contemporary design, sustainability and technological innovations in order to deal +with the growing pains of pollution, competition of urban land and decreasing availability of clean water, which will impact on... -
An analysis of the development of home exchange organisations
Item type: Journal Article • Journal: • Authors: Alexander Grit --- Stenden University, Qatar Paul Lynch --- Strathclyde University, GlasgowThis paper contributes to a better understanding of the home exchange phenomenon by considering the historical development of the home exchange intermediation processes, membership profiles and the role of the media. The Internet has enabled a more interactive process and... -
The influence of gender roles and traditional healing on cervical screening adherence amongst women in a Cape Town peri-urban settlement
Item type: Journal Article • Journal: South African Family Practice • Authors: Despina Learmonth --- Department of Psychology, South Africa Anica Jansen van Vuuren --- Department of Psychology, South Africa Chantelle De Abreu --- Department of Psychology, South AfricaBackground: Cervical cancer is the third most common gynaecologic malignancy worldwide and is the second most common cancer among South African women. Although entirely preventable, cervical cancer is responsible for the death of approximately 3 027, 53% of those diagnosed,... -
An unusual conduit for a paediatric tracheostomy tube exchange
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: BS Küsel --- Anaesthesia Registrar, South Africa RE Hodgson --- Inkosi Albert Luthuli Central Hospital, Durban, South Africa and Department of Anaesthesia and Critical Care, South AfricaThis case report demonstrates the challenges of the paediatric airway, and useful, practical solutions in the management of tracheostomies in children. A six-year-old child underwent a tracheostomy, where an inappropriately large tracheostomy tube was inserted. The choice was guided by... -
Dissemination effort, innovation attributes, and variations in innovation dissemination rate
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mawuena Aggey --- Process Technology and Innovation Research, Ghana Nana Kwamina Tekyi Ghartey --- Centre for Development Studies, Ghana Charles Kweku Brown --- Centre for Development Studies, GhanaInnovation-decision type, communication channels, social system, and change agents’ promotion effort influence innovation adoption, but 49–87% of variance in adoption rates is explained by perceived innovation attributes (Rogers 1995). Relationships between adoption rates and these variables are much researched but... -
Uncertainty, cost of capital and financial disclosure: A review of the theory and some evidence
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: M Negash --- University of the Witwatersrand,This paper contains a critical review of the uncertainty research, and reports on the relationship between corporate disclosure and the adverse selection component of the buy-sell (bid-ask) spread of stock prices. Order processing and holding costs will be decoupled from... -
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... -
Remuneration Committees in South African Listed Companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: D Penkin Kenneth --- Master of Commerce of the University of Cape Town in Financial Management (2009),This article examines the administration of executive compensation in listed South African companies in order to understand the background to the emotive expressions by the public concerning the amount of executive earnings. It conducts research in order to ascertain whether... -
Silvopastoral system based on Ficus thonningii: an adaptation to climate change in northern Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mulubrhan Balehegn --- Animal Rangeland and Wildlife Sciences, Ethiopia Lars O Eik --- Department of International Environment and Development Studies, Ås, Norway Yayneshet Tesfay --- International Livestock Research Institute (ILRI), EthiopiaThis study in northern Ethiopia investigated local people's perception of climate change and the role of indigenous silvopastoralism in adaptation to that change. Two hundred and forty respondents participated in a questionnaire survey and group discussions. Local communities perceive climate... -
The evaluation of development projects. A South African anthropological perspective
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: RD Coertze --- Centre for Indigenous Law, South AfricaThe need to equate development with a process of self-directed westernisation in the present time is explained initially in this discussion. This is followed by a discussion on the involvement of the Ethnological Section of the former Department of Development... -
Monica Wilson (1908–1982) and social change
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: David Brokensha --- Department of Social Anthropology,Monica Wilson's writings contain a wealth of material on social change, on how institutions and groups and values change. Based on extensive fieldwork among the Pondo of the Eastern Cape and the Nyakyusa of Tanzania, her ethnographies and many articles... -
On law and legality in post-apartheid South Africa: insights from a migrant street trader
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Jürgen Schraten --- The Human Economy Project, Faculty of Humanities, South AfricaThis article focuses on the experience of law and legality by a migrant street trader in post-apartheid South Africa. The experiences of this stall vendor are analysed alongside theoretical notions of law and the legal system. The ways that law... -
Institutions and social change: a case study of the South African National AIDS Council
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Theodore Powers --- The Human Economy Project, Faculty of Humanities, South AfricaInstitutions play an important role in the success or failure of social models, as they promote or limit particular political and economic activities. Central to this point is the understanding that institutions and traditions are in a constant state of... -
Towards a human economy: reflections on a new project
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: John Sharp --- Department of Anthropology and Archaeology, South AfricaThe University of Pretoria's Human Economy project began at the end of 2010. To date it has involved eighteen post-doctoral fellows, drawn from around the world, and eight doctoral candidates, all from Africa. This paper reviews the project's progress, drawing... -
Temporal changes in cranial size in South African vlei rats (Otomys): evidence for the ‘third universal response to warming’
Item type: Journal Article • Journal: African Zoology • Authors: Aluwani Nengovhela --- Department of Ecology and Resource Management, School of Environmental Sciences, South Africa Roderick M Baxter --- Department of Ecology and Resource Management, School of Environmental Sciences, South Africa Peter J Taylor --- South African Research Chair on Biodiversity Value and Change in the Vhembe Biosphere Reserve, School of Mathematics and Natural Sciences, South AfricaUsing museum collections and recently collected specimens we studied geographical and temporal (from 1906 to 2013) changes in skull size of two sibling species of rodents, Otomys auratus and O. angoniensis, in northern South Africa occupying distinct temperate grassland (O... -
Characteristics and landcover of estuarine boundaries: implications for the delineation of the South African estuarine functional zone
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DA Veldkornet --- Department of Botany, South Africa JB Adams --- Department of Botany, South Africa L van Niekerk --- Department of Botany, South AfricaThis study investigated whether the current lateral boundary for estuaries in South Africa, i.e. the estuarine functional zone (EFZ), includes all estuarine habitats. The EFZ covers 173 930 ha in 304 estuaries/outlets nationally. Field surveys and analysis of available aerial... -
Invasion of sandflats in Langebaan Lagoon, South Africa, by the alien mussel Mytilus galloprovincialis: size, composition and decline of the populations
Item type: Journal Article • Journal: African Zoology • Authors: N. Hanekom --- South African National Parks, South Africa P. Nel --- West Coast National Park, South AfricaSince the 1980s the introduced Mediterranean mussel (Mytilus galloprovincialis) has successfully invaded the southern African coastline and has become the dominant species on rocky intertidal shores of the west coast. This study investigates a recent extension of its distribution into... -
Impacts of climatic changes on small mammal communities in the Sahel (West Africa) as evidenced by owl pellet analysis
Item type: Journal Article • Journal: African Zoology • Authors: Massamba Thiam --- IRD, CBGP (UMR 022: IRD/INRA/CIRAD/SupAgroMontpellier), Centre ISRA/IRD de Dakar Bel Air, Sénégal Khalilou Bâ --- IRD, CBGP (UMR 022: IRD/INRA/CIRAD/SupAgroMontpellier), Centre ISRA/IRD de Dakar Bel Air, Sénégal Jean-marc Duplantier --- IRD, CBGP( UMR 022: IRD/INRA/CIRAD/SupAgroMontpellier), Campus International de Baillarguet, FranceTo evaluate the impact of climatic change on rodent sahelian communities, we analysed the contents of over 2500 barn owl (Tyto alba) pellets collected along the Senegal river between 1989 and 2003, and from the Ferlo sahelian area in 2003... -
Ekerekeia nom. nov., a replacement name for Farquharsonia Currie, 1928 (Echinodermata: Euechinoidea), preoccupied by Farquharsonia Collin, 1922 (Insecta: Diptera)
Item type: Journal Article • Journal: African Zoology • Authors: Hüsey¥n Özd¥kmen --- Department of Biology, Science and Arts Faculty, Turkey Abel Udo Udoh --- Department of Biology, TurkeyA junior homonym was detected among fossil echinoid genera and the following replacement name is proposed: Ekerekeia nom. nov. for Farquharsonia Currie, 1927 (nec Collin, 1922). Accordingly, new combinations are herein proposed for the species currently included in this genus:... -
Ecophysiology of Acacia species in wet–dry tropical plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Alieta Eyles --- Tasmanian Institute of Agriculture, University of Tasmania, Australia Paul Drake --- Cooperative Research Centre for Forestry, Australia Le Thanh Quang --- Forest Science Sub-Institute of South Vietnam, Vietnam Pham Van Bon --- Forest Science Sub-Institute of South Vietnam, Vietnam Daniel Mendham --- CSIRO Ecosystems Sciences, Australia Don White --- CSIRO Ecosystems Sciences, Australia Kieu Tuan Dat --- Forest Science Sub-Institute of South Vietnam, Vietnam Pham The Dung --- Forest Science Sub-Institute of South Vietnam, Vietnam Chris Beadle --- Tasmanian Institute of Agriculture, University of Tasmania, AustraliaSelected tropical Acacia species are used extensively for short-rotation plantation forestry in many parts of Asia and, to a limited degree, in Australia. We explored leaf-level photosynthetic activity and leaf water potential (Ψleaf) of three field-grown Acacia tree species (aged... -
“Giving God his due?” Understanding tithing and its function within the Seventh-Day Adventist Church
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Evan Carl Edward Jacobs --- NRF Chair in History Programme: “Local Histories and Present Realities,”, South AfricaThis paper focuses on the practice of tithing as an extraordinary form of religious giving. Tithing involves habitually giving ten percent of one's income to the church, and since this is such a significant portion of a person's income, its... -
Urban cemeteries in Swaziland: materialising dignity
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Casey Golomski --- Department of Social Anthropology, South AfricaThis photo essay traces the materiality of urban cemeteries in Swaziland to underscore the production of dignity in contemporary funeral culture. Increasingly, death and burial in town are realities for many people who have lost social ties or land tenure... -
Job stress and attitudes toward change: The mediating effect of psychological attachment
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Melinde Coetzee --- Department of Industrial and Organisational Psychology, South Africa Pamela J.J. Chetty --- Department of Industrial and Organisational Psychology, South AfricaThe present study explores the indirect effect of job stress on attitudes toward change through individuals’ psychological attachment (organisational commitment mindsets and job embeddedness). The sample comprised N = 350 employees (black African: 67%; males: 69%; 26–40 years: 67%) who... -
Effects of short-term water deficit stress on physiological characteristics of Bambara groundnut (Vigna subterranea (L.) Verdc.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Yusuf Y Muhammad --- School of Biosciences, Malaysia Sean Mayes --- Plant and Crop Sciences, School of Biosciences, UK Festo Massawe --- School of Biosciences, MalaysiaBambara groundnut (Vigna subterranea (L.) Verdc.) is an annual leguminous food crop native to Africa. The crop is grown in marginal soils and it is considered to be a drought-resistant species. However, there is limited information on the ways Bambara... -
The mediating effect of leader-member exchange between strengths use and work engagement
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Crizelle Els --- WorkWell Research Unit, South Africa Jolandie Viljoen --- School of Human Resource Sciences, South Africa Leon de Beer --- WorkWell Research Unit, South Africa Lelani Brand-Labuschagne --- WorkWell Research Unit, South AfricaThis study investigated the mediating effect of leader-member exchange (LMX) (as perceived by subordinates) in the relationship between strengths use and work engagement. Participants numbered 213 employees in a South African financial organisation (females=53.10%, blacks=19.40%). Data on their perceptions of... -
Reflooding the Faguibine floodplain system, northern Mali: potential benefits and challenges
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: O Hamerlynck --- Kenya Wetlands Biodiversity Research Team, Kenya SA Moulaye Zeine --- Global Monitoring, Mauritania JY Mutua --- Kenya Wetlands Biodiversity Research Team, Kenya LV Mukhwana --- Kenya Wetlands Biodiversity Research Team, Kenya M Yéna --- Direction Nationale de l’Hydraulique du Mali, MaliThe Faguibine system, northern Mali, consists of a series of interconnected floodplains of which the flooded surface area declined from about 1 000 km² in the late 19th century to only some 90 km² in 2010. Flood extent depends on... -
Mangrove reforestation: greening or grabbing coastal zones and deltas? Case studies in Senegal
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MC Cormier-Salem --- IRD, UMR PALOC, Senegal J Panfili --- IRD, UMR MARBEC, FranceBesides their important contribution to global biodiversity, mangroves provide many services. Nevertheless, due to an increase of human activities and to climate change, in less than 20 years these ecosystems have lost one fifth of their global surface area. In... -
Acute management of hyperlipaemic pancreatitis: a successful reduction in triglyceride levels with simultaneous insulin infusion and plasma exchange
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: A Korb --- Specialist Physician in Private Practice, South Africa PH Sonnekus --- Specialist Physician in Private Practice, South Africa JD Botha --- Specialist Physician in Private Practice, South AfricaWe report on a case in which a combination of an insulin infusion and plasma exchange were successfully used in the acute management of hyperlipaemic pancreatitis. -
Improvement noted after a multifaceted approach to diabetes mellitus management
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: S Pillay --- Department of Internal Medicine, South Africa C Aldous --- School of Clinical Medicine, University of KwaZulu-Natal, South Africa F Mahomed --- Department of Internal Medicine, South AfricaBackground: Optimal control of diabetes mellitus remains elusive, especially in developing countries. A comprehensive and standardised approach, coupled with intensive patient and clinician education, may provide the solution. -
Influence of local environmental conditions and bleaching histories on the diversity and distribution of Symbiodinium in reef-building corals in Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LJ Chauka --- Institute of Marine Sciences, Tanzania G Steinert --- Institute for Chemistry and Biology of the Marine Environment (ICBM), Germany MSP Mtolera --- Institute of Marine Sciences, TanzaniaPollution, turbidity and coral bleaching history, as well as coral diversity, vary along the Tanzanian coastline. Prior to this study, it was not known whether exposure to such environmental variation might have influenced the diversity and distribution of Symbiodinium along... -
Hospitableness and sustainable development: New responsibilities and demands in the host-guest relationship
Item type: Journal Article • Journal: • Authors: Arjan van Rheede --- Research Centre, Hotelschool, The Hague, The Netherlands Daphne Maria Dekker --- Research Centre, Hotelschool, The Hague, The NetherlandsHow does the current paradigm of the host-guest relationship cause the hospitality industry to lag behind in sustainable development? Hospitality is often defined as “a feeling of being welcome”. It is about “welcoming the stranger: a person who comes today... -
The role of snail aestivation in transmission of schistosomiasis in changing climatic conditions
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: O Rubaba --- College of Health Sciences, South Africa MJ Chimbari --- College of Health Sciences, South Africa S Mukaratirwa --- School of Life Sciences, South AfricaSchistosomiasis vector snails are subjected to extreme seasonal changes, particularly in ephemeral rivers and lentic waterbodies. In the tropics, aestivation is one of the adaptive strategies for survival and is used by snails in times of extremely high temperatures and... -
Development of a Malian food exchange system based on local foods and dishes for the assessment of nutrient and food intake in type 2 diabetic subjects
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: A. Coulibaly --- Département des sciences des aliments et de nutrition, Faculté des sciences de l’agriculture et de l’alimentation, Canada Ht O’Brien --- Département des sciences des aliments et de nutrition, Faculté des sciences de l’agriculture et de l’alimentation, Canada I. Galibois --- Département des sciences des aliments et de nutrition, Faculté des sciences de l’agriculture et de l’alimentation, CanadaObjective: To develop exchange lists for the assessment of food and nutrient intakes for people with diabetes in Mali. -
Green economy transition and the sustainability of the Nigerian aquaculture industry: Policy perspectives and the way forward
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Zelda A. Elum --- College of Agriculture and Environmental Sciences, South Africa Vuyo Mjimba --- Institute for Corporate Citizenship, South AfricaSustainable development and green economy transition call for innovations that address the simultaneous realisation of economic growth, and improved human and environmental well-being. A holistic and appropriate policy and legislative regime is important to ensure the efficacy of these innovations... -
An analysis of director interlocks on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: J. J. Williams --- Ernst & Young, South Africa J. Deodutt --- School of Accounting, Economics and Finance, South Africa L. J. Stainbank --- School of Accounting, Economics and Finance, South AfricaDirector interlocks, which occur when companies have directors in common, have concerned shareholders, the public and legislators since the early 1900s. The purpose of this paper is to analyse the interlocking directorships of the Top 40 companies listed on the... -
Suspended silt and salinity tolerances of the first zoeal stage of the fiddler crab Uca annulipes (Decapoda: Brachyura) and why marine connectivity is essential to the survival of the species
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Peer --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa NAF Miranda --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa R Perissinotto --- DST/NRF Research Chair in Shallow Water Ecosystems, South AfricaFiddler crabs (Uca spp.) undergo the zoeal stage of development in open-ocean waters, where they experience stable salinity levels, low turbidity and reduced predation. The St Lucia estuarine system has undergone many geomorphological changes, both natural and anthropogenic, and the... -
Workplace ethics culture and work engagement: The mediating effect of ethical leadership in a developing world context
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jeremy Mitonga-Monga --- Department of Industrial & Organisational Psychology, South Africa Aden-Paul Flotman --- Department of Industrial & Organisational Psychology, South Africa Frans Cilliers --- Department of Industrial & Organisational Psychology, South AfricaThis study examined the mediating effect of ethical leadership on the relationship between workplace ethics culture and work engagement among employees in a railway transport organisation in the Democratic Republic of the Congo (DRC). The sample consisted of permanently employed... -
Long-term landscape changes in vegetation structure: fire management in the wetlands of KwaMbonambi, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LB Luvuno --- School of Life Sciences, South Africa DC Kotze --- Centre for Water Resources Research, School of Agricultural, Earth and Environmental Sciences, South Africa KP Kirkman --- School of Life Sciences, South AfricaIn wetlands the effects of fire on vegetation dynamics are somewhat uncertain. A change detection analysis in the herbaceous wetlands of KwaMbonambi, South Africa, which were subject to frequent fires, revealed that in 1937 the study area comprised grassland (69%),... -
Cape cormorants decrease, move east and adapt foraging strategies following eastward displacement of their main prey
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Branch: Oceans & Coasts, Department of Environmental Affairs, South Africa RM Randall --- South African National Parks, South Africa TR Cook --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa BM Dyer --- Branch: Oceans & Coasts, Department of Environmental Affairs, South Africa R Fox --- Addo Elephant National Park, South African National Parks, South Africa D Geldenhuys --- CapeNature, Voëlklip, South Africa J Huisamen --- CapeNature, Voëlklip, South Africa C McGeorge --- CapeNature, Voëlklip, South Africa MK Smith --- South African National Parks, South Africa L Upfold --- Branch: Oceans & Coasts, Department of Environmental Affairs, South Africa J Visagie --- CapeNature, Scientific Services, Assegaaibosch Nature Reserve, South Africa LJ Waller --- CapeNature, Voëlklip, South Africa PA Whittington --- Department of Zoology, South Africa CG Wilke --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, South Africa AB Makhado --- Branch: Oceans & Coasts, Department of Environmental Affairs, South AfricaNumbers of Cape cormorants Phalacrocorax capensis breeding in South Africa decreased by nearly 50% from approximately 107 000 pairs in 1977–1981 to 57 000 pairs in 2010–2014. Although four colonies had >10 000 pairs in 1977–1981, there was just one... -
The case for behavioural change counselling for the prevention of NCDs and improvement of self-management of chronic conditions
Item type: Journal Article • Journal: South African Family Practice • Authors: KM Murphy --- Department of Medicine, South Africa R Mash --- Division of Family Medicine and Primary Care, South Africa Z Malan --- Division of Family Medicine and Primary Care, South AfricaBrief behaviour change counselling (BBCC) that is integrated into routine health care has been shown to be effective in helping patients modify risk behaviours for non-communicable disease (NCD), improve self-management of chronic conditions, as well as produce clinically meaningful improvements... -
The relationship between HIV and AIDS and water scarcity in Nyamakate resettlements land, north-central Zimbabwe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Alexio Mbereko --- University of KwaZulu-Natal, South Africa Dianne Scott --- University of KwaZulu-Natal, South Africa Moses John Chimbari --- University of KwaZulu-Natal, South AfricaHIV and AIDS and water variability have been studied separately, yet, they impact on rural households simultaneously in an interactive manner. The study provide narratives on various realities from a study in the Nyamakate community that illustrates the dialectical relationship... -
Climate change and intellectual property rights in Africa: Environmental necessity-economic opportunity
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- National Centre for Technology Management, Federal Ministry of Science and Technology, Nigeria Caleb M. Adelowo --- National Centre for Technology Management, Federal Ministry of Science and Technology, Nigeria David A. Ogunkanbi --- National Centre for Technology Management, Federal Ministry of Science and Technology, Nigeria Adesina A. Oyewale --- National Centre for Technology Management, Federal Ministry of Science and Technology, Nigeria Abolaji D. Dada --- Department of Entrepreneurship Management Technology, Nigeria Bamidele R. Muritala --- National Centre for Technology Management, Federal Ministry of Science and Technology, NigeriaPromoting the development of clean technologies is critical in achieving a low-carbon economy in Africa. The objective of this paper is to shed more light on the role of IPRs in the efforts to mitigate climate change in Africa. This... -
Farmer perceptions of climate change impacts on Swaziland’s sugar industry
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bon’sile Faith Nicollete Mhlanga-Ndlovu --- Department of Environmental Science, South Africa Godwell Nhamo --- Institute for Corporate Citizenship, University of South Africa, South AfricaThis study investigates the perceptions of sugarcane farmers on climate change impacts and their potential alternative livelihoods in the Lowveld of Swaziland with the objective of informing research and policy initiatives. The study obtained data mainly from a survey involving... -
An analysis of the development of home exchange organisations
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Alexander Grit --- Stenden University, Qatar Paul Lynch --- Strathclyde University,This paper contributes to a better understanding of the home exchange phenomenon by considering the historical development of the home exchange intermediation processes, membership profiles and the role of the media. The Internet has enabled a more interactive process and... -
Imagine staying in a Shanghai hotel bedroom in 2050?
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Tan Li Yu Rebecca --- Victoria Management School, New Zealand Ian Yeoman --- Victoria Management School, New ZealandWill the future hotels of Shanghai emphasise a world of contemporary design, sustainability and technological innovations in order to deal with the growing pains of pollution, competition of urban land and decreasing availability of clean water, which will impact on... -
The interstices of hospitality
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Luiz Octávio de Lima Camargo --- School of Hospitality and Tourism, Anhembi Morumbi University, BrazilThis paper is a review of previous works, and it shows the notion of hospitality situated at the confluence of the concepts of interpersonal relationships, virtue, rites and commercial/non-commercial exchange. In doing so it discusses the most significant authors who... -
Hospitableness and sustainable development: New responsibilities and demands in the host-guest relationship
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Arjan van Rheede --- Research Centre, Hotelschool, The Netherlands Daphne Maria Dekker --- Research Centre, Hotelschool, The NetherlandsHow does the current paradigm of the host-guest relationship cause the hospitality industry to lag behind in sustainable development? Hospitality is often defined as “a feeling of being welcome”. It is about “welcoming the stranger: a person who comes today... -
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... -
Premiums and discounts of exchanged-traded funds
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Wessel M. Badenhorst [cor1]The objective of this study is to determine whether the spread in underlying exchange-traded fund (ETF) investments is a significant cause of the premium/discount of the ETF. Spreads of underlying investment portfolios are alternatively calculated using weighted bid-ask and bid-close... -
A review of carbon dynamics and assessment methods in the miombo woodlands
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ferdinand Handavu --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, South Africa Paxie W Chirwa --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, South Africa Stephen Syampungani --- Department of Environmental and Plant Sciences, Zambia Larwanou Mahamane --- African Forest Forum, c/o World Agroforestry Centre (ICRAF), KenyaProvision of accurate carbon (C) measurements and analysis are critical components in quantification of C stocks. The objectives of this review were to (1) compile and synthesise current knowledge of available methods for C stock estimation, (2) examine socio-economic drivers... -
Forests, people and environment: some African perspectives
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Paxie W Chirwa --- Forest Science Postgraduate Programme, Department of Plant and Soil Sciences, South Africa Larwanou Mahamane --- African Forest Forum, c/o World Agroforestry Centre (ICRAF), Kenya Godwin Kowero --- African Forest Forum, c/o World Agroforestry Centre (ICRAF), KenyaForests in Africa support the livelihoods of millions of people through provision of timber and non-timber forest products, food and nutrition, energy and payment of environmental services. However, mismanagement of forests has resulted in deforestation and forest degradation, thereby contributing... -
Constructing a positive narrative for African sport consumerism
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Frederick W. Stander --- Optentia Research Focus Area, South AfricaSport consumerism is a burgeoning field of practice and serves both the utilitarian and behaviouristic goals. The utilitarian aspects are aligned to derivatives of value generated through the sport consumption effort. Behaviourism in the consumer context suggests a communal narrative,... -
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... -
A review of interprovincial variations in HIV prevalence rates in Zimbabwe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Elisa Sibanda --- Department of Development Studies, South Africa Prudence Khumalo --- Department of Public Administration, South AfricaDespite the proven remarkable decline of HIV prevalence in the sub-Saharan Africa region, both sub-regional and within-country disparities in HIV prevalence persist. This paper is a survey of literature on HIV prevalence and spread in Zimbabwe, focusing on provincial differences... -
Improvement of spatial modelling of crop suitability using a new digital soil map of Tanzania
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Kristin Piikki --- International Center for Tropical Agriculture (CIAT), Kenya Leigh Winowiecki --- World Agroforestry Centre (ICRAF), Kenya Tor-Gunnar Vågen --- World Agroforestry Centre (ICRAF), Kenya Julian Ramirez-Villegas --- International Center for Tropical Agriculture (CIAT), Colombia Mats Söderström --- International Center for Tropical Agriculture (CIAT), KenyaClimate change is projected to have widespread impacts on the climate suitability and geographical distribution of agricultural crops. Simulations were conducted on the suitability of common beans (Phaseolus vulgaris L.) in Tanzania under progressive climate change, taking into account a... -
Longer rest periods for intensive rotational grazing limit diet quality of sheep without enhancing environmental benefits
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Warwick B Badgery --- Orange Agricultural Institute, AustraliaIntensive rotational grazing systems (also called cell grazing, holistic grazing or time-controlled grazing) are often implemented to improve production and environmental outcomes. Over recent years there has been considerable interpretation and adaption of the holistic principles that guide the management... -
Eucalypt plantation management in regions with water stress
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: José LM Gonçalves --- Department of Forest Science, Brazil Clayton A Alvares --- Institute of Forest Research and Study, Brazil José HT Rocha --- Department of Forest Science, Brazil Carolina B Brandani --- Department of Forest Science, Brazil Rodrigo Hakamada --- Department of Forest Science, BrazilMost eucalypt plantations are managed in short rotations (6–8 years) and are established in regions with water and nutritional stresses of varying degrees. The mean annual increment in these regions ranges from 20 to 45 m3 ha−1 y−1 depending on... -
HIV stigma experiences and stigmatisation before and after a HIV stigma-reduction community “hub” intervention
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Catharina Dorothea Prinsloo --- Africa Unit for Transdisciplinary Health Research (AUTHeR), Faculty of Health Sciences, South Africa Minrie Greeff --- Africa Unit for Transdisciplinary Health Research (AUTHeR), Faculty of Health Sciences, South Africa Annamarie Kruger --- Africa Unit for Transdisciplinary Health Research (AUTHeR), Faculty of Health Sciences, South Africa Itumeleng Paul Khumalo --- Optentia Research Focus Area, South AfricaThis study sought to explore, describe and determine whether an HIV stigma-reduction community “hub” intervention would change the HIV stigma experiences of people living with HIV (PLWH) and the stigmatisation by the community in an urban area in South Africa... -
“We have heard it together”: a qualitative analysis of couple HIV testing and counselling recruitment in Malawi’s Option B+ programme
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Nora E Rosenberg --- University of North Carolina Project, Malawi Rebecca Gross --- University of North Carolina Project, Malawi Tiwonge Mtande --- University of North Carolina Project, Malawi Suzanne Maman --- School of Public Health, USA Carol E Golin --- School of Medicine, USA Friday Saidi --- University of North Carolina Project, Malawi Olivia Manthalu --- University of North Carolina Project, Malawi Irving Hoffman --- University of North Carolina Project, Malawi Mina C Hosseinipour --- University of North Carolina Project, Malawi William C Miller --- University of North Carolina Project, MalawiEncouraging HIV-infected pregnant women to recruit male partners for couple HIV testing and counselling (CHTC) is promoted by the World Health Organization, but remains challenging. Formal strategies for recruiting the male partners of pregnant women have not been explored within... -
Prospective conceptual model of Tomatis® method effects on students’ self-regulation
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Annelize Bonthuys --- Community Psychosocial Research (COMPRES), Department of Psychology, South Africa Karel Botha --- Community Psychosocial Research (COMPRES), Department of Psychology, South Africa Anneke Stols --- African Unit of Transdisciplinary Health Research (AUTHeR), South AfricaThis study aimed to develop a preliminary conceptual model that explains the perceived effect of the Tomatis® method on university students’ self-regulation for study course learning. Seven beginning graduate students (6 female; 3 black, 4 white) with a large South... -
Vicarious traumatisation experiences among South African Police Service members in a rural setting: An exploratory study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Masefako Andronica Gumani --- Department of Psychology, South AfricaThe objective of this study was to explore the vicarious traumatisation experiences of South African Police Service members serving in a rural community. The participants consisted of 17 purposively selected police members (females = 4; age range 27 to 55;... -
Deforestation since independence: a quantitative assessment of four decades of land-cover change in Malawi
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rachel A Bone --- Centre for Environmental Sciences, Faculty of Engineering and the Environment, UK Kate E Parks --- Centre for Environmental Sciences, Faculty of Engineering and the Environment, UK Malcolm D Hudson --- Centre for Environmental Sciences, Faculty of Engineering and the Environment, UK Mathews Tsirinzeni --- LEAD Southern and Eastern Africa, Chancellor College, Malawi Simon Willcock --- Centre for Biological Sciences, Faculty of Natural and Environmental Sciences, UKLand cover has changed rapidly across the tropics over the past century; however, detailed historical information describing the extent and possible drivers of such change is widely lacking. Here, we constructed a history of land-cover change at the district level... -
Love matters: exploring conceptions of love in Rwanda and Swaziland and relationship to HIV and intimate partner violence
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Allison Ruark --- Department of Medicine, USA Erin Stern --- Department of Global Health and Development, UK Thandeka Dlamini-Simelane --- Institute for Health Measurement, Swaziland Marie Fidele Kakuze --- Independent Consultant, SwazilandHealth risks such as intimate partner violence (IPV) and HIV infection often occur within intimate sexual relationships, yet the study of love and intimacy is largely absent from health research on African populations. This study explores how women and men... -
Making Sense of Africa's Emerging Digital Transformation and its Many Futures
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Bitange Ndemo --- School of Business, Kenya Tim Weiss --- Department of Management Science and Engineering, USADigital technologies have spread across the African continent at an inexorable pace. Widely cited data on adoption rates suggest that digital technologies are making their way into every facet of life in African societies — a broader change process cast... -
The impact of river flooding and high flow on the demersal fish assemblages of the freshwater-dominated Great Fish Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P Nodo --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa A-R Childs --- Department of Ichthyology and Fisheries Science, South Africa MDV Nakin --- Department of Biological and Environmental Sciences, South AfricaFreshwater inflow has a strong impact on the biological, chemical and physical characteristics of estuaries, which in turn affect the distribution and abundance of estuarine organisms. Increased climatic variability associated with climate change is predicated to modify precipitation patterns, which... -
Fair value accounting by listed South African companies in the non-financial sector
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: M. H.Y. Razak --- School of Accounting, Economics and Finance, South Africa L. J. Stainbank --- School of Accounting, Economics and Finance, South AfricaThis study uses a content analysis of 82 listed South African companies’ annual reports to determine the extent to which South African listed companies in the non-financial sector choose optional fair value accounting (FVA). The study found that almost all... -
In search of conclusive evidence on the trade-off and pecking order theories of capital structure: Evidence from the Johannesburg Stock Exchange
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Chimwemwe Chipeta --- School of Economic and Business Sciences, South Africa David McClelland --- School of Economic and Business Sciences, South AfricaThis paper tests the validity of the trade-off and pecking order theories of capital structure for non-financial firms listed on the Johannesburg Stock Exchange. Firstly, we find that the pecking order model is superior than the partial adjustment regressions at... -
Change as a travel benefit: Exploring the impact of travel experiences on Italian youth
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Simona Staffieri --- Italian National Institute of Statistics, Italy Elena Cavagnaro --- Academy of International Hospitality Research, The Netherlands Bill Rowson --- Academy of International Hospitality Research, The NetherlandsThis paper aims, firstly, at identifying the main dimensions of perceived change induced in young people by a travel experience and, secondly, at understanding which dimensions of the tourism experience have the greatest influence on this change. A survey was... -
Psychological empowerment and organisational change among hotel employees in Egypt
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Mohamed A. Nassar --- Hotel Studies Department, Faculty of Tourism and Hotels, EgyptEmpowering employees can have a significant impact on increasing job satisfaction, efficiency and productivity in the hotel industry. This paper aims to investigate the effect of empowerment on readiness for and acceptance of organisational changes among employees in Egyptian chain... -
Population connectivity of an overexploited coastal fish, Argyrosomus coronus (Sciaenidae), in an ocean-warming hotspot
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Henriques --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South Africa CV Santos --- Faculdade de Ciências da Universidade Agostinho Neto (FCUAN), Angola WHH Sauer --- Department of Ichthyology and Fisheries Science, South Africa PW Shaw --- Department of Ichthyology and Fisheries Science, South AfricaThe West Coast dusky kob Argyrosomus coronus is a commercially exploited fish with a distribution confined to the Angola–Benguela Frontal Zone (ABFZ) of the southeastern Atlantic Ocean. A previous study revealed that during a recent period of local warming the... -
Terrestrial discharge influences microbioerosion and microbioeroder community structure in coral reefs
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SA Mwachireya --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya M Carreiro-Silva --- Department of Oceanography and Fisheries (IMAR network), Portugal BE Hartwick --- Department of Biological Sciences, Canada TR McClanahan --- Wildlife Conservation Society, Marine Programs, USAMicrobioerosion rates and microbioeroder community structure were studied in four Kenyan protected coral-reef lagoons using shell fragments of Tridacna giant clams to determine their response to the influence of terrestrial run-off. Fourteen different microbioeroder traces from seven cyanobacteria, three green... -
The 39 Country Initiative and Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Paul W. Beamish --- International Business Institute, Ivey Business School, CanadaManagement education in Africa’s poorest countries suffers from the greatest resource constraints of any continent on earth. At least three major challenges exist: lack of current teaching material; very expensive books/photocopies, making an insufficient quantity of materials available; and too... -
Predicting staff retention from employee motivation and job satisfaction
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Michelle De Sousa Sabbagha --- Department of Industrial and Organisational Psychology, South Africa Ophillia Ledimo --- Department of Industrial and Organisational Psychology, South Africa Nico Martins --- Department of Industrial and Organisational Psychology, South AfricaThis study investigated the role of employee motivation and job satisfaction as predictors of staff retention in a foreign exchange bank. Participants were 341 employees of a South African foreign exchange bank division (female = 62.8%; black = 31.1%; managers = 37%, mean years of experience = 10... -
Temperature control of the distributional range of five C3 grass species in the uKhahlamba-Drakensberg Park, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Luke K Bentley --- South African Environmental Observation Network, South Africa Tim G O’Connor --- South African Environmental Observation Network, South AfricaGlobal climate change is expected to influence the distribution of global biodiversity. C4 and C3 perennial grasses co-occur in the fire-prone KwaZulu-Natal uKhahlamba-Drakensberg grasslands, with C3 grass species occurring at cooler locations in the mountain range and C4 grass species... -
Oat silage for grazing dairy cows in small-scale dairy systems in the highlands of central Mexico
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Victor Andrés Burbano-Muñoz --- Instituto de Ciencias Agropecuarias y Rurales, Mexico Felipe López-González --- Instituto de Ciencias Agropecuarias y Rurales, Mexico Julieta Gertrudis Estrada-Flores --- Instituto de Ciencias Agropecuarias y Rurales, Mexico Pedro Alan Sainz-Sánchez --- Institut für Tropische Agrarwissenschaften (Hans-Ruthenberg-Institute), Fachgebiet Tierernährung und Weidewirtschaft in den Tropen und Subtropen, Germany Carlos Manuel Arriaga-Jordán --- Instituto de Ciencias Agropecuarias y Rurales, MexicoThe objective was to evaluate the provision of oat silage (Avena sativa) to supplement grazing dairy cows on pastures of perennial ryegrass (Lolium perenne), festulolium (Lolium multiflorum × Festuca pratense) and white clover (Trifolium repens) during the dry season when... -
Determinants of market participation and marketing channels in smallholder groundnut farming: A case of Mudzi district, Zimbabwe
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nelson Mango --- International Centre for Tropical Agriculture, Zimbabwe Clifton Makate --- International Centre for Tropical Agriculture, Zimbabwe Nicola Francesconi --- Technical Center for Agricultural and Rural Cooperation (CTA), The Netherlands Matthias Jager --- International Centre for Tropical Agriculture (CIAT), Colombia Mark Lundy --- International Centre for Tropical Agriculture (CIAT), ColombiaThis paper investigates the factors that are associated with market participation and choice of marketing channels by smallholder groundnut farmers in a semi-arid district of Zimbabwe. It contributes to the existing body of knowledge on groundnuts, especially the marketing aspect... -
The Folktale and Social Values in Traditional Africa
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Enongene Mirabeau Sone --- Department of Arts (English), South AfricaAfricans, like people elsewhere in the world, have a set of values which they consider worthwhile and necessary for the preservation and wellbeing of their culture. In this way, it may be said that societal values are embodied in and... -
Latitudinal gradients and poleward expansion of mangrove ecosystems in South Africa: 50 years after Macnae’s first assessment
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Peer --- DST/NRF Research Chair in Shallow-Water Ecosystems, South Africa A Rajkaran --- Department of Biodiversity and Conservation Biology, South Africa NAF Miranda --- DST/NRF Research Chair in Shallow-Water Ecosystems, South Africa RH Taylor --- Department of Hydrology, South Africa B Newman --- CSIR Natural Resources and the Environment, South Africa F Porri --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa JL Raw --- Department of Botany, South Africa SP Mbense --- Department of Botany, South Africa JB Adams --- Department of Botany, South Africa R Perissinotto --- DST/NRF Research Chair in Shallow-Water Ecosystems, South AfricaMangroves occur in South African estuaries at their poleward distribution limits, extending into temperate habitats. In 1963, William Macnae published the first comprehensive assessment of mangrove swamps in South Africa and made firsthand observations of these mangrove ecosystems. This article... -
Effects of exposure to an intensive HIV-prevention programme on behavioural changes among female sex workers in Nairobi, Kenya
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ravi Prakash --- Karnataka Health Promotion Trust (KHPT), India Parinita Bhattacharjee --- Department of Community Health Sciences, Canada Andrea Blanchard --- Department of Community Health Sciences, Canada Helgar Musyoki --- National AIDS and STI Control Programme (NASCOP), Ministry of Health, Kenya John Anthony --- Department of Community Health Sciences, Canada Joshua Kimani --- Department of Community Health Sciences, Canada Gloria Gakii --- Partners for Health and Development in Africa (PHDA), Kenya Martin Sirengo --- National AIDS and STI Control Programme (NASCOP), Ministry of Health, Kenya Nicholas Muraguri --- Ministry of Health (MoH), Kenya Elizabeth Mziray --- The World Bank, USA Lombe Kasonde --- The World Bank, USA James Blanchard --- Department of Community Health Sciences, Canada Shajy Isac --- Department of Community Health Sciences, Canada Stephen Moses --- Department of Community Health Sciences, CanadaWhile Kenya has had a long-standing national HIV-prevention programme, evidence on the level of exposure to its interventions and related effects on behavioural changes among female sex workers (FSWs) is limited. Using cross-sectional behavioural data collected in 2013 from 1... -
Promoting mental health of students living with HIV using appreciative inquiry
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Teolene Diedricks --- Department of Educational Psychology, South Africa Christoffel Myburgh --- Department of Educational Psychology, South Africa Marie Poggenpoel --- Department of Educational Psychology, South AfricaLiving with HIV poses many challenges. This is especially true for students living with HIV (SLHIV) within a university setting. The challenges faced by SLHIV makes it difficult for them to see new possibilities in living with the virus. The... -
A reflection on a visual ethnography of Namibia
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Rosa Persendt --- Contemporary Social Issues Unit, Office of the Pro-Vice-Chancellor (Academic Affairs), NamibiaIn this essay, Rosa Persendt reflects on Gregor Dobler's photo essay “Presence and Absence: Shops as Traces of Hopes in Apartheid Namibia” which deals with ethnographic photos taken of empty cucu [trading stores] opened in the early 1950s and the... -
Ostrich, Southern Ostrich or Common Ostrich? The ‘eternal vexed question’ of English bird names and name changes in southern Africa through eight editions of Roberts field guides, 1940–2016
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Eckhart J Buchmann --- Faculty of Health Sciences, South Africa Colleen T Downs --- School of Life Sciences, South AfricaA set of stable simple common bird names helps non-ornithologist birders, who contribute to conservation by visiting protected areas and participating in citizen science projects. Changes in English bird names have caused discomfort in the local birding community, especially those... -
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... -
Courage and confidence to stop lying: caregiver perspectives on a video to support paediatric HIV disclosure in Kampala, Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Sonja Klingberg --- Medical Research Council Epidemiology Unit & UK Clinical Research Collaboration Centre for Diet and Activity Research, United Kingdom Rachel King --- Global Health Sciences, Uganda Janet Seeley --- Department of Global Health and Development, United Kingdom Resty Lubwama --- Makerere University–Johns Hopkins University Research Collaboration, Uganda Margaret Namuganga --- Makerere University–Johns Hopkins University Research Collaboration, Uganda Barbara Nabiryo --- Makerere University–Johns Hopkins University Research Collaboration, Uganda Monica Etima --- Makerere University–Johns Hopkins University Research Collaboration, Uganda Philippa Musoke --- Makerere University–Johns Hopkins University Research Collaboration, Uganda Lisa M. Butler --- Institute for Collaboration on Health, Intervention and Policy, ConnecticutThe World Health Organization (WHO) recommends that HIV-positive children are told their diagnosis by age 12 years. However, most perinatally-infected children reach adolescence without being told their HIV status. Effective strategies are needed to promote disclosure, and optimise children’s health... -
Mapping dynamics of low-carbon energy innovation for small hydropower technology in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- National Centre for Technology Development, Federal Ministry of Science and Technology, NigeriaThe urgent need for clean innovative energy systems is widely recognized amidst increasing concerns over energy insecurity, climate change and other environmental impacts of a carbon-constrained economy. Several renewable energy technologies such as small hydropower (SHP) are poised to play... -
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... -
Soil organic carbon storage in a tropical freshwater wetland: the influence of vegetation type
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: David Were --- , Ethiopia Frank Kansiime --- , Uganda Tadesse Fetahi --- , Ethiopia Thomas Hein --- , AustriaThe impact of different vegetation communities on soil organic carbon (SOC) in a tropical freshwater wetland in Uganda was investigated. SOC content, density and storage potential were determined under three different dominant vegetation communities: Cyperus papyrus L., Typha latifolia L... -
Mapping tree aboveground biomass and carbon in Omo Forest Reserve Nigeria using Landsat 8 OLI data
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Iveren B Chenge --- Department of Forest Resources Management, Nigeria Johnson SA Osho --- Department of Forest Resources Management, NigeriaProtected areas in Nigeria are important ecosystems for carbon storage. The aim of this study was to estimate and map tree aboveground biomass (TAGB) and carbon (TAGC) within a tropical forest in Nigeria. Stepwise regression analysis was implemented to develop... -
Cold storage for low-cost air-conditioning
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel M. Madyira --- Department of Mechanical Engineering Science, South AfricaBuilding heating, ventilation and air-conditioning (HVAC) consumes 50% of the building energy consumption. Such high costs are based on the conventional HVAC cycles for air cooling based on grid connected buildings. However, there are alternative passive and active cold storage... -
Long-term changes in land use, land cover and vegetation in the Karoo drylands of South Africa: implications for degradation monitoring
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Timm Hoffman --- Department of Biological Sciences, South Africa Andrew Skowno --- South African National Biodiversity Institute, South Africa Wesley Bell --- Department of Biological Sciences, South Africa Samukele Mashele --- Department of Biological Sciences, South AfricaWe used several large data sets at a range of temporal and spatial scales to document the land-use/land-cover change (LULCC) dynamics of the semi-arid Succulent Karoo and Nama-Karoo biomes of South Africa. More than 95% of the Karoo is comprised... -
Drivers and trajectories of social and ecological change in the Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Cherryl Walker --- Department of Sociology and Social Anthropology, South Africa Suzanne J Milton --- Wolwekraal Conservation and Research Organisation, South Africa Tim G O’Connor --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Judy M Maguire --- unaffiliated, South Africa W Richard J Dean --- Wolwekraal Conservation and Research Organisation, South AfricaThis review article explores past, present and possible future drivers of change in Karoo social-ecological systems. Biogeographically, the Karoo comprises the arid Succulent Karoo and Nama-Karoo biomes covering significant portions of the Northern Cape, Eastern Cape and Western Cape provinces... -
Biological soil crusts of the Succulent Karoo: a review
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Bettina Weber --- Max Planck Institute for Chemistry, Germany Alexandra Tamm --- Max Planck Institute for Chemistry, Germany Stefanie Maier --- Max Planck Institute for Chemistry, Germany Emilio Rodríguez-Caballero --- Department of Desertification and Geo-Ecology, Experimental Station of Arid Zones (EEZA-CSIC), SpainThe Succulent Karoo is characterised by a dense coverage of biological soil crusts (biocrusts) belonging to different types and successional stages. Whereas the Soebatsfontein region hosts cyanobacteria-dominated and minor amounts of lichen- and bryophyte-dominated biocrusts, the Knersvlakte comprises a rich... -
Effects of short-term intensive trampling on Karoo vegetation
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jeannine McManus --- Landmark Foundation, South Africa Stefan A Goets --- Landmark Foundation, South Africa William J Bond --- Department of Biological Sciences, South Africa Joh R Henschel --- South African Environmental Observation Network (SAEON): Arid Lands Node, South Africa Bool Smuts --- Landmark Foundation, South Africa Suzanne J Milton --- South African Environmental Observation Network (SAEON): Arid Lands Node, South AfricaPlant growth forms likely respond differently to disturbances such as trampling. We investigated the trampling effect of 1 600 sheep encamped at night in temporary enclosures (kraals, corrals or pens), which were relocated weekly. To examine trampling effects and regeneration... -
Vegetation responses to seasonal weather conditions and decreasing grazing pressure in the arid Succulent Karoo of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ute Schmiedel --- Institute for Plant Science and Microbiology, Germany Jens Oldeland --- Institute for Plant Science and Microbiology, GermanyThe Succulent Karoo biome is a renowned centre of biodiversity and endemism in the arid winter rainfall region of South Africa that is threatened by climate change. On 20 permanently marked plots within a biodiversity observatory, species richness and cover... -
Reflections on the Karoo Special Issue: towards an interdisciplinary research agenda for South Africa’s drylands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South Africa Cherryl Walker --- Department of Sociology and Social Anthropology, South Africa Joh R Henschel --- South African Environmental Observation Network (SAEON): Arid Lands Node, South AfricaWe begin this essay with reflections on major research themes highlighted by the Karoo Special Issue (KSI). These include concerns over land-use change, long-term monitoring, climate change, governance and the need for more interdisciplinary research. We also identify some of... -
The presence of artificial water points structures an arid-zone avian community over small spatial scales
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Salamatu Abdu --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Alan TK Lee --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Susan J Cunningham --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaWater plays a key role in avian thermoregulation, especially when environmental temperatures approach or exceed body temperature. Birds living in arid environments need to either be adapted to life with unreliable access to water, or engage in large-scale movements to... -
Comparison of physiological responses to high temperatures in juvenile and adult Cape Rockjumpers Chaetops frenatus
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Krista N Oswald --- Department of Zoology, South Africa Alan TK Lee --- Fitzpatrick Institute of African Ornithology, DST/NRF Centre of Excellence, South Africa Ben Smit --- Department of Zoology, South AfricaConcerns about climate change have led to an increase in studies on physiological mechanisms birds possess to cope with increasing temperatures. For range-restricted species such as Cape Rockjumpers Chaetops frenatus, whose population declines are correlated with habitat warming, we identified... -
Climate change and adaptation-induced engineering design and innovations in water development projects in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Berhanu F. Alemaw --- Department of Geology, Botswana Nako M. Sebusang --- Department of Civil Engineering, BotswanaIn this paper, a framework for best practice for incorporating climate change and adaption in Africa is presented from mainly the water resources design and management perspectives to chart systematically ways of incorporating climate change in engineering design of water... -
Sustaining African water resources under climate change: Emerging adaptation measures from UNFCCC national communications
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Shepherd Muchuru --- Institute for Corporate Citizenship, University of South Africa, South Africa Godwell Nhamo --- Institute for Corporate Citizenship, University of South Africa, South AfricaThe changing climate is expected to affect the demand for and availability of water resources. The African continent is known to be water scarce with highly temporal and spatially variable rainfall. This paper explores climate-induced challenges faced in the water... -
Allometric equations from a non-destructive approach for biomass prediction in natural forest and plantation in West Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: SA Hamzath Kora --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, Benin GH Sabin Guendehou --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, Benin Cédric A Goussanou --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, Benin Achille E Assogbadjo --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, Benin Brice Sinsin --- Laboratory of Applied Ecology, Faculty of Agronomic Sciences, BeninAllometric equations are required for a rapid estimation of commercial timber volume and forest biomass stocks. In order to preserve the forest ecosystem, this study applied a non-destructive sampling approach to measure biophysical properties of living trees. From these measurements,... -
Exchange rate impact on output and inflation: A historical perspective from Zimbabwe
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nyasha Mahonye --- School of Economic and Business Sciences (SEBS), South Africa Tatenda Zengeni --- Competition and Tariff Commission of Zimbabwe, Harare, ZimbabweThis research looks at the inflationary effect of currency devaluation and its contractionary effect on real output growth in Zimbabwe. The study uses quarterly data from 1990 to 2006 and utilizes the Johansen co-integration regression test and vector error correction... -
Investor sentiment, stock returns, and analyst recommendation changes: The KOSPI stock market
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Karam Kim --- College of Economics, Republic of Korea Doojin Ryu --- College of Economics, Republic of Korea Heejin Yang --- Department of Global Economics and Commerce, Republic of KoreaBy analysing daily data on the KOSPI stock market, we examine how investor sentiment and stock market returns respond to announcements of changes in analysts’ recommendations. In addition, we examine the effect of these announcements on the relationship between investor... -
The taste of a healthy and sustainable diet: What is the recipe for the future?
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Peter R Klosse --- Gastronomy, Hotel Management School Maastricht, The NetherlandsThe world faces serious challenges and many of those involve current food behaviour. People have been seduced into liking food and drinks that are neither healthy nor good for the environment. Clearly we need a robust food system that is... -
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... -
Vegetation dynamics in the face of a major land-use change: a 30-year case study from semi-arid South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Olli Hyvärinen --- FitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South Africa Chevonne Reynolds --- FitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, South AfricaAlthough wildlife production is widely considered beneficial for semi-arid environments, few studies have reported on the long-term environmental effects of converting from livestock production to game ranching. Asante Sana Game Reserve in South Africa was stocked with domestic livestock for... -
The driving forces behind the home bias phenomenon: Evidence from Israel
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Sivan Riff --- University of Haifa, Israel Joseph Yagil --- University of Haifa and Western Galilee College, IsraelThe home bias phenomenon is a widely investigated puzzle that is still not completely resolved. Home bias is the tendency of investors to invest excessively in domestic assets, in contradiction to the traditional optimal portfolio theories. This research attempts to... -
Ethiopian immigrants to Israel: The persistence and transformation of African values and practices in art and life
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Patricia M. Greenfield --- Department of Psychology, USA Oshrat Sulika Rotem --- Department of Education, Israel Michael Weinstock --- Department of Education, IsraelWe present a qualitative interdisciplinary study of seven Ethiopian potters who immigrated to Israel as adults. Data sources include cultural products (their clay sculptures), interviews, and archival photos at the time of immigration. Together these data sources show how these... -
Geographical and temporal variation in the diet of Bank Cormorants Phalacrocorax neglectus in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: BM Dyer --- Department of Environment, South Africa J Cooper --- Department of Botany and Zoology, South Africa RJM Crawford --- Department of Environment, South Africa RB Sherley --- Environment and Sustainability Institute, University of Exeter, United Kingdom S Somhlaba --- Department of Environment, South Africa A Cockcroft --- Department of Environment, South Africa L Upfold --- Department of Environment, South Africa AB Makhado --- Department of Environment, South AfricaThe Bank Cormorant Phalacrocorax neglectus is endemic to the Benguela upwelling ecosystem off southwest Africa and is classified as Endangered owing to a recent large reduction in its number. It is thought that food scarcity, including a decreased abundance of... -
Innovation financing and public policy dilemmas in the Economic Community of West African States (ECOWAS)
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Joseph Ato Forson --- Department of Banking and Finance, GhanaAs part of efforts to change the structure of economies in sub-Saharan Africa from agrarian dominated to a more diversified one that will add value to exports and create more job opportunities, countries in the region have intensified strategies through... -
Leader-member exchange and organisational citizenship behaviour: The mediating and moderating effects of role ambiguity
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Leigang Zhang --- School of Teacher Education, China Huaibin Jiang --- School of Education, China Tingting Jin --- Intensive Care Unit, Shaoxing People’ Hospital, ChinaThis study investigated the mediating and moderating effects of role ambiguity (RA) on the relationship between leader- member exchange (LMX) and organisational citizenship behaviour (OCB). Participants were 426 nurses recruited from 12 public hospitals in China (female = 99.1%; mean... -
Megaherbivore response to droughts under different management regimes: lessons from a large African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Izak PJ Smit --- , South Africa Mike JS Peel --- , South Africa Sam M Ferreira --- , South Africa Cathy Greaver --- , South Africa Danie J Pienaar --- , South AfricaDroughts are predicted to increase in frequency and intensity for large parts of Africa. It is unclear how this may impact native grazers in protected areas, and how these outcomes may differ under contrasting management approaches. Reducing artificial water sources... -
Drought challenges for nature tourism in the Sabi Sands Game Reserve in the eastern region of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Tamzyn Smith --- , South Africa Jennifer M Fitchett --- , South AfricaThe Lowveld of South Africa, a savanna biome region economically dominated by nature tourism, has experienced a prolonged dry period beginning in approximately 2015. Despite emerging literature on climate and tourism in southern Africa, the challenges to tourism in the... -
Observations on the natural history of a savanna drought
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Izak PJ Smit --- , South Africa William J Bond --- , South AfricaDrought studies are often opportunistic and post hoc, where a drought fortuitously occurs during a research project that was not specifically designed to study the drought, but where researchers capitalised on the opportunity. These studies often lack focus on formulating... -
Forb community responses to an extensive drought in two contrasting land-use types of a semi-arid Lowveld savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: F Siebert --- , South Africa J Klem --- , South Africa H Van Coller --- , South AfricaProjected increases in the frequency and severity of drought events are expected to impose changes in the ecology of native forb communities in semi-arid ecosystems. We examined the state of forb communities during, and directly after an extreme drought event... -
Effect of drought on communal livestock farmers in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S Vetter --- , South Africa VL Goodall --- , South Africa R Alcock --- , South AfricaDespite the size of the informal small-scale farming sector and its livestock holdings in South Africa, there has been little detailed work to assess how livestock populations are affected by drought. South Africa experienced a major drought in 2015–2016. We... -
Physico-chemical and microalgal gradients change rapidly in response to mouth closure in a predominantly open estuary
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DA Lemley --- Botany Department and the Institute for Coastal and Marine Research, South Africa JB Adams --- Botany Department and the Institute for Coastal and Marine Research, South AfricaA third of South Africa’s freshwater flow no longer reaches the coast, yet few systems have shifted from being permanently open to temporarily closed. For the first time since 1969, the Gamtoos Estuary mouth closed in June 2018, because of... -
Biomass partitioning in an endemic southern African salt marsh species Salicornia tegetaria (Chenopodiaceae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CE Brown --- Department of Biodiversity and Conservation Biology, South Africa A Rajkaran --- Department of Biodiversity and Conservation Biology, South AfricaThe below ground biomass of salt marsh species accounts for more than half of the total plant biomass in salt marsh systems, yet no biomass data exist for salt marsh species in South Africa. The aims of the current study... -
High flow variability and storm events shape the ecology of the Mbhashe Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NC James --- South African Institute for Aquatic Biodiversity, South Africa JB Adams --- Institute for Coastal and Marine Research, South Africa AD Connell --- South African Institute for Aquatic Biodiversity, South Africa SJ Lamberth --- South African Institute for Aquatic Biodiversity, South Africa CF MacKay --- Oceanographic Research Institute, South Africa GC Snow --- Institute for Coastal and Marine Research, South Africa L van Niekerk --- Institute for Coastal and Marine Research, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity, South AfricaThe possible impacts of extreme events on the ecology of selected aquatic biota within the Mbhashe Estuary were investigated during a four year (2010–2013) spring sampling programme. During periods of low to average flow conditions the estuary is shallow, turbid... -
Interactive effects of pH and temperature on native and alien mussels from the west coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MP Emanuel --- Marine Research Institute, Department of Biological Sciences, South Africa D Pillay --- Marine Research Institute, Department of Biological Sciences, South Africa M van der Merwe --- Centre for Higher Education Development, South Africa GM Branch --- Marine Research Institute, Department of Biological Sciences, South AfricaGlobal warming and ocean acidification influence marine calcifying organisms, particularly those with external shells. Among these, mussels may compensate for environmental changes by phenotypic plasticity, but this may entail trade-offs between shell deposition, growth and reproduction. We assessed main and... -
The influence of the market on inflation, not the other way around
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Carlos de Jesus --- , Gizelle D. Willows --- , Alison M. Olivier --- , South AfricaThe study of return prediction is fundamental to investors. However, inconclusive evidence exists as to whether returns on the South African (SA) stock market may be explained by movements in SA or international macroeconomic variables. This study investigates integration between... -
Carbon stock in the community managed Sal (Shorea robusta) forests of Dadeldhura district, western Nepal
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Suresh Prashad Bhatta --- , Nepal Anjana Devkota --- , NepalFour community-managed Sal forests in Dadeldhura district of Nepal were selected for the assessment of carbon stock. The stratified random sampling method was applied to measure the field data from 105 sample plots of 100 m2. The carbon stock of... -
Body mass and condition of a fynbos bird community: investigating impacts of time, weather and raptor abundance from long-term citizen- science datasets
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Alan Tristram Kenneth Lee --- , South Africa Phoebe Barnard --- , South Africa Mike Fraser --- , South Africa Chris Lennard --- , South Africa Ben Smit --- , South Africa Hans-Dieter Oschadleus --- , South AfricaVariation in body size, especially mass, is a function of local environmental conditions for any given species. Recent recorded decreases in body size of endotherms have been attributed to climate change in some cases. This prediction is based on the... -
Trends in savannah waterbirds: protected area effect and influence of global threats on differing guilds
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tawanda Tarakini --- , Zimbabwe Peter Mundy --- , Zimbabwe Hervé Fritz --- , FranceUnderstanding species threats is underpinned by information on their population trends. We investigated the contribution of population drivers associated with 86 waterbird species’ trends at a local scale, Hwange National Park (HNP) and a national scale (Zimbabwe). We used logistic... -
Trends in populations of Blue Crane Anthropoides paradiseus in agricultural landscapes of Western Cape, South Africa, as measured by road counts
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Donella J Young --- , South Africa James A Harrison --- , South AfricaPopulation trends of the Blue Crane Anthropoides paradiseus were monitored by volunteers participating in Coordinated Avifaunal Roadcounts (CAR) in the Overberg and Swartland agricultural regions of the Western Cape province from 1993 and 1996, respectively, until 2019 in the Overberg... -
Impact of climate change on yield and water use efficiencies of potato in different production regions of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AC Franke --- , South Africa LN Muelelwa --- , South Africa JM Steyn --- , South AfricaIn South Africa, the potato is produced in regions with different climates. Climate change is expected to result in higher temperatures, thus increasing the incidence of heat stress, but lowering the risk of frosts in mid-altitude areas. Increasing ambient carbon... -
Clean energy transition in a developing society: Perspectives on the socioeconomic determinants of Solar Home Systems adoption among urban households in southeastern Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Edlyne Eze Anugwom --- , Nigeria Kenechukwu Nwakego Anugwom --- , Nigeria Oliver Ifeanyi Eya --- , NigeriaThis study identifies factors that constrain the adoption of clean energy sources by urban households in southeastern Nigeria, using the Solar Home Systems (SHS) as a case study. It is premised on the assumption that adoption of innovation is affected... -
Tailoring conservation farming to climate change in the smallholder farming sector: Case of lowveld areas in Zimbabwe
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Christopher Tafara Gadzirayi --- , Zimbabwe Desmond Manatsa --- , Zimbabwe Edward Mutandwa --- , ZimbabweThis study on tailoring conservation farming to climate change attempted to design and proffer ways that enhance the application of climate information in managing climate-related production risks among smallholder farmers. The study characterized climate hazards related to crop and livestock... -
Characterisation of ecosystem-based adaptations to drought in the central cattle corridor of Uganda
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Susan Nanfuka --- , Uganda David Mfitumukiza --- , Uganda Anthony Egeru --- , UgandaEcosystems provide climate-change adaptation opportunities including ecosystem services, adaptation benefits and livelihood improvement especially for natural resource dependent communities. To contribute to the understanding of location specific adaptation processes of predominantly agro-pastoralists, a study was carried out in the central... -
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... -
Tracking error vs tracking difference: Does it matter?
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Ailie Charteris --- , South Africa Kerry McCullough --- , South AfricaFund fact sheets are intended to provide investors with information necessary to make investment decisions. For passive funds, the inclusion of cumulative returns for the fund and benchmark enable investors to measure the fund’s tracking performance using tracking difference. However,... -
Inter-annual growth response of three Miombo tree species to climatic effects
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Francis Munalula --- , South Africa Thomas Seifert --- , South Africa Martina Meincken --- , South AfricaMiombo woodlands cover a large part of Southern Africa and contribute an important wood source for the local wood industry. The already observed and further predicted changes in climatic patterns can be expected to affect the wood properties of Miombo... -
Application of metaheuristic algorithms in DC-optimal power flow
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Oluwafemi Ajayi --- , South Africa Nnamdi Nwulu --- , South Africa Uyikumhe Damisa --- , South AfricaThis paper presents the application of two metaheuristic algorithms (Exchange Market Algorithm and Ant Lion Optimizer) in solving the DC optimal power flow problem. The objective of this study is to minimize fuel costs associated with electricity generation. Advanced Interactive... -
Social exchange influences on ethical leadership and employee commitment in a developing country setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jeremy Mitonga-Monga --- , South AfricaThis study examined the extent to which social exchange moderates the relationship between ethical leadership and perceptions of organisational commitment. Participants were 355 employees (women = 39%) from a Public Works Department in the Democratic Republic of Congo (DRC). The... -
Application of a general methodology to understand vulnerability and adaptability of the fisheries for small pelagic species in the Benguela countries: Angola, Namibia and South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KL Cochrane --- , South Africa K Ortega-Cisneros --- , South Africa JA Iitembu --- , Namibia CI dos Santos --- , Angola WHH Sauer --- , South AfricaThe fisheries for small pelagic species in Angola, Namibia and South Africa fulfil important social and economic roles but have undergone substantial changes in recent years, some of which are likely to be related to climate change. This assessment of... -
The impact of internal communication on customers’ perception of revenue strategies
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Marit de Vries --- , the Netherlands Bill Rowson --- , the Netherlands Xandra Vasse --- , the NetherlandsThis article focuses on communication, specifically internal communication, which is often underestimated when changes to management strategy affect both employees and customer perception. The article focuses on the front-office team in a hotel that is carrying out a new revenue... -
Mechanisms of drought response in Populus
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Lita Yi --- , China Bin Li --- , China Helena Korpelainen --- , Finland Fei Yu --- , China Lihong Wu --- , China Lingyun Tong --- , China Meihua Liu --- , ChinaDrought affects plant growth and has become a serious problem worldwide. Populus species have different drought tolerance and sensitivity abilities. In order to evaluate the mechanism of drought stress tolerance in different cultivated Populus species distributed in China, the response... -
Understanding the relevance of indigenous knowledge on climate change adaptation among mixed farmers in the Ngono River Basin, Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Theobald Frank Theodory --- , TanzaniaClimate change poses major threats to people and ecosystems. In many areas, climate change impacts have affected the availability of basic necessities including freshwater, food security, and energy. Developing countries are more adversely impacted by climate change and are less... -
Interannual variation in metal concentrations in surface waters of the Marico River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Pienaar --- , South Africa V Wepener --- , South Africa CT Wolmarans --- , South AfricaThis study was conducted to establish the interannual variation in the concentration of metals regarded as toxic to aquatic fauna in the Marico River of South Africa. Five surveys were conducted between 2013 and 2015 at six sites in the... -
Longitudinal species turnover rates are predictable and should guide location of sampling sites for South African river surveys to assess aquatic biodiversity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NA Rivers-Moore --- , South Africa FC de Moor --- , South AfricaRepresentative samples of biota collected relative to environmental gradients are important for measuring present distributions and predicting shifts in distribution of taxa in response to climate change or reduced river connectivity. Based on river ecology theory and established measures of... -
Frequent burning maintained a stable grassland over four decades in the Drakensberg, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Craig D Morris --- , South Africa Colin S Everson --- , South Africa Terry M Everson --- , South Africa Paul J Gordijn --- , South AfricaThe mesic montane grasslands of the uKhahlamba-Drakensberg, which produce cured flammable fuel, have evolved under and are sustained by recurrent fires. The Brotherton burning trial (12 replicated treatments) was established at Cathedral Peak (1 890 m asl) in 1980 to... -
Fire and the persistence, decline and extirpation of Protea roupelliae subsp. roupelliae trees in a montane grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: François R Smith --- , South Africa Timothy G O’Connor --- , South Africa James E Granger --- , South Africa Angela J Beaumont --- , South AfricaWe investigated long-term changes, from 1979 to 2015, in the abundance of Protea roupelliae subsp. roupelliae trees growing in a montane grassland of the uKhahlamba-Drakensberg mountains. The study involved counting the numbers of adults and juveniles (saplings and seedlings) in... -
Grass functional trait responses to experimental warming and fire in Afromontane grasslands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mariska te Beest --- , The Netherlands Anne Kleinjan --- , The Netherlands Veerle Tuijnman --- , The Netherlands Nicky Findlay --- , The Netherlands Thembeka Mvelase --- , South Africa Elizabeth le Roux --- , United Kingdom Michelle Tedder --- , South Africa Paul Gordijn --- , South Africa Susan Janse van Rensburg --- , South AfricaClimate change is one of the main challenges facing humanity in the coming century. To understand the impact of climate change on biodiversity and ecosystem functioning, we urgently require a better understanding of plant responses to climate change. To address... -
A case study of rangeland vegetation changes from 1979 to 2016 in the Middle Atlas Mountains of Morocco
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: A El Aich --- , Morocco ME Fernández-Giménez --- , United States M Rouzi --- , Morocco CL Alados --- , SpainThis case study assessed changes in vegetation composition of a 0.8 ha rangeland site over the past four decades, in relation to changes in temperature and to an increase in grazing pressure. The frequency and standing crop (biomass) of species... -
Modelling continental range shift of the African elephant (Loxodonta africana) under a changing climate and land cover: implications for future conservation of the species
Item type: Journal Article • Journal: African Zoology • Authors: Sintayehu W Dejene --- , Ethiopia Kudzai S Mpakairi --- , Rajapandian Kanagaraj --- , Germany Yussuf A Wato --- , Kenya Sewnet Mengistu --- , EthiopiaClimate and land use change are anticipated to alter the distribution of wildlife, due to their impact on the quantity and quality of forage availability, water cycle, as well as competition for key resources. Using an ensemble of species distribution... -
Tier 2 above-ground biomass expansion functions for South African plantation forests
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Steven Dovey --- , South Africa Ben du Toit --- , South Africa Jacob Crous --- , South AfricaCarbon stocks estimated for greenhouse gas emission reporting in South African plantation forests require improvement for local relevance. We developed biomass expansion and conversion factor (BECF) models to convert enumeration data to above-ground biomass (AGB) for major genera. Local biomass... -
South African raptors in urban landscapes: a review
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Shane C McPherson --- , South Africa Petra Sumasgutner --- , Austria Colleen T Downs --- , South AfricaGlobally, but especially in Africa, increasing human populations and anthropogenic land-use change are generally affecting diversity negatively. Urban environments in southern Africa typically comprise a mosaic landscape of anthropogenic infrastructure with some green spaces. These urban cities have a range... -
Assessing the impact of climate change on crop production in southern Africa: a review
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AC Franke --- , South AfricaThis paper provides a systematic review of studies assessing the impact of climate change on crop yields in southern Africa. Moreover, it synthesises the current knowledge of the impact of elevated ambient CO2 levels (eCO2) and temperatures on physiological processes,... -
Moving to design-based education in hotel management school: proof of success and beyond — a research journey
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Hanneke Assen --- , the Netherlands Marte Rinck de Boer --- , the Netherlands Macmillion B Fernandes --- , the NetherlandsNHL Stenden University of Applied Sciences adopted the innovative educational concept design-based education (DBE) in 2018. The Hotel Management School is one of the programmes that introduced a DBE curriculum. It is important to explore to what extent DBE is... -
BMI-based figure rating scale (FRS) as an adjunctive aid in nutritional screening and assessment in a resource-limited setting
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: E van Tonder --- , South Africa N Dihawa --- , South AfricaObjectives: Many existing malnutrition screening and diagnostic tools require body mass index (BMI) and quantification of weight change to detect malnutrition or risk thereof. This is often a challenge in South African public hospitals due to missing data, including patient... -
Perceived information communication and technology (ICT) demands and psychological well-being among Gabon civil servants: The moderating role of social support and organisational support
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Joseph Medzo-M’engone --- , FranceThis study examined the role of social and organisationnal support in the relationship between emloyee perceptions of information communication and technology (ICT) demands and psychological well-being. Civil service employees (N = 162) in a large public institution in Gabon were... -
Species-specific or assemblage-wide decline? The case of Arthroleptides dutoiti Loveridge, 1935 and the amphibian assemblage of Mount Elgon, Kenya
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jacob M Ngwava --- National Museums of Kenya, Kenya Christopher D Barratt --- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Germany Elizabeth Boakes --- University College London, United Kingdom Beryl A Bwong --- National Museums of Kenya, Kenya Alan Channing --- North-West University, South Africa Olivia Couchman --- Zoological Society of London, United Kingdom Stefan Lötters --- Trier University, Germany Patrick K Malonza --- National Museums of Kenya, Kenya Vincent Muchai --- National Museums of Kenya, Kenya Julius K Nguku --- National Museums of Kenya, Kenya Joash Nyamache --- National Museums of Kenya, Kenya Nisha Owen --- On the EDGE Conservation, United Kingdom Victor Wasonga --- National Museums of Kenya, Kenya Simon P Loader --- Natural History Museum, United KingdomThe frog Arthroleptides dutoiti Loveridge, 1935, endemic to Mount Elgon, East Africa was last collected in 1962 and has not been observed since. The species is regarded as Critically Endangered by the IUCN Red List and is a priority species... -
Potentials of leys or pasture-based forage production in Nigeria
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Saheed Olaide Jimoh --- , China Yunusa Muhammad Ishiaku --- , Nigeria Tracy Burnett --- , United States Ahmed Adeyemi Amisu --- , Nigeria Rasheed Adekunle Adebayo --- , South AfricaFulani pastoralists are widely distributed across the six geographical zones of Nigeria and migrate from north to south in search of natural grazing lands at times of forage scarcity. This migration leads annually to resource use conflict and deadly attacks... -
Investigating the effects of hypersalinity on the cardiac performance of the invasive gastropod Melanoides tuberculata (Müller, 1774)
Item type: Journal Article • Journal: African Zoology • Authors: TJ de Haas --- , South Africa LJ Connell --- , South Africa R Greenfield --- , South AfricaAnthropogenic activities have propelled the exploitation of natural environments, which along with climate change have resulted in salinity intrusion to freshwater ecosystems worldwide. To determine the extent the hypersalinity stressor has on freshwater ecosystems, physiological cardiac responses in the freshwater... -
Hot and bothered: alterations in faecal glucocorticoid metabolite concentrations of the sungazer lizard, Smaug giganteus, in response to an increase in environmental temperature
Item type: Journal Article • Journal: African Zoology • Authors: J Scheun --- , South Africa R Campbell --- , South Africa A Ganswindt --- , South Africa T McIntyre --- , South AfricaDespite the commonly held belief that reptiles are immune to extreme temperatures, global warming is predicted to result in the loss of 40% of all reptile species by 2080. In order to understand the effects of elevated temperature on African... -
Short-term recovery of macroinvertebrate communities following a flash flood in an urban river: a case study of the Palmiet River in Durban, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: N Khumalo --- , South Africa S Mdluli --- , South Africa J Lebepe --- , South AfricaExtreme floods have become frequent in the urban Palmiet River due to exacerbating climate change. Therefore, the current study aimed to explore a short-term recovery of macroinvertebrate communities following a flash flood in the Palmiet River, KwaZulu-Natal, South Africa. Different... -
Carbon production from seasonal litterfall in the Brazilian Atlantic Forest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Greyce CB Maas --- , Brazil Carlos R Sanquetta --- , Brazil Renato Marques --- , Brazil Sebastião do A Machado --- , Brazil Mateus NI Sanquetta --- , Brazil Ana Paula D Corte --- , Brazil Iara M Barberena --- , BrazilForests play an important role in climate change, acting as a source or sink of carbon. There is, however, a lack of data regarding the carbon production from litterfall in tropical forests. The Atlantic Forest is one of the most... -
Investigating climate change awareness and adaptation strategies among female farmers in the Lephalale municipal area in South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Michael Obisesan --- , South Africa Munyaradzi Chitakira --- , South AfricaThis study evaluated climate change awareness and adaptation strategies among female farmers in the Lephalale municipal area in the Limpopo province of South Africa. A concurrent mixed method research approach was undertaken. Qualitative data were obtained through five focus group... -
Phytoplankton community structure in relation to physico-chemical factors in a tropical soda lake, Lake Shala (Ethiopia)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Solomon Wagaw --- , Ethiopia Seyoum Mengistou --- , Ethiopia Abebe Getahun --- , EthiopiaPhytoplankton communities responses to physico-chemical factors were studied in Lake Shala from January to December 2018. Distinct spatial and seasonal variations were observed for all physico-chemical parameters, except DO (ANOVA: p < 0.05). In total, 72 taxa, Bacillariophyta (55 taxa),... -
Seasonal variation in water quality, plankton diversity and microbial load of tropical freshwater lakes in Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Ihuoma N Anyanwu --- , Nigeria Confidence A Ezema --- , Nigeria Sowechi Ebi --- , Nigeria Chinyere A Nwajiuba --- , Nigeria Okoro Nworie --- , Nigeria Chioma O Anorue --- , NigeriaSeasonal changes significantly affect tropical ecosystems; hence, verification of how these changes affect water quality is important for waterbodies that serve as water and food sources, particular as such changes are often associated with shifts in plankton diversity and microbial... -
How abusive supervision affects unethical pro-organisational behaviour: A moderated mediation examination of exchange and proactive personality
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jing Wang --- , China Gangqiang Wang --- , China Guoqin Liu --- , China Yalin Chu --- , China Li Zhou --- , ChinaIn this study, we examined how abusive supervision would be associated with unethical pro-organisational behaviour (UPB). Using a time-lag study design, we collect a sample of 322 working adults from a large bank in the south-west of China (female =... -
Institutional and technological innovation for the bamboo sector as an instrument for development and climate change resilience in Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Tefera Belay Endalamaw --- , Ethiopia Dietrich Darr --- , GermanyGiven a huge resource base, numerous product and service functions, bamboo can top many of the species recommended for integrated rural development in the context of climate change. Despite this potential, there is gap in knowledge and innovation to make... -
Unleashing traditional ecological knowledge for biodiversity conservation and resilience to climate change in Rwanda
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nathan Kanuma Taremwa --- , Rwanda Marie-Christine Gasingirwa --- , Rwanda Donat Nsabimana --- , RwandaThe purpose of this study was to assess how traditional ecological knowledge systems can be leveraged to achieve biodiversity conservation and build resilience to climate change. A sequential mixed methods approach was used to study 379 local people residing around... -
Could CO2-induced changes to C4 grass flammability aggravate savanna woody encroachment?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Sarah Lynn Raubenheimer --- , South Africa Kimberley Simpson --- , South Africa Richard Carkeek --- , South Africa Brad Ripley --- , South AfricaFire plays an important role in maintaining the savanna tree-grass balance by limiting the recruitment of heat-sensitive tree seedlings. However, fire behaviour may change under increasing CO2 concentrations, due to altered flammability of the grassy layer. Here, we determined the... -
Historic changes in the fire-rainfall relationship at a woodland-savanna transition zone in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T Hamilton --- , South Africa S Archibald --- , South Africa S Woodborne --- , South AfricaSouthern Africa is dominated by fire-prone arid and semi-arid landscapes that are expected to experience increased maximum temperatures, rainfall variation and frequency of extreme rainfall events in the future. These conditions will affect fire and vegetation dynamics, but feedback and... -
The effect of changes in human drivers on the fire regimes of South African grassland and savanna environments over the past 100 years
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: James R Puttick --- , South Africa M Timm Hoffman --- , South Africa Timothy G O’Connor --- , South AfricaFire is a key regulator of tree cover in grassy ecosystems, but century-long changes in fire regimes have not been explicitly quantified in South Africa. This study aimed to determine changes in the fire regimes of South Africa’s grassy biomes... -
Inclusive leadership and employee innovative work behaviours: Testing a psychological empowerment and leader-member exchange moderated-mediation model
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Bülent Çetinkaya --- , Turkey Tahir Yeşilada --- , TurkeyWe investigated the association between inclusive leadership and innovative work behaviours, and the role of psychological empowerment and leader-member exchange in that relationship. Participants were 508 employees from tourism, textile, and banking sectors in Turkey (female = 51.38%; age range... -
The potential effect of pre-exposure prophylaxis (PrEP) roll-out on sexual-risk behaviour among adolescents and young people in East and southern Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Andrew Sentoogo Ssemata --- , Uganda Richard Muhumuza --- , Uganda Lynda Stranix-Chibanda --- , Zimbabwe Teacler Nematadzira --- , Zimbabwe Nadia Ahmed --- , South Africa Stefanie Hornschuh --- , South Africa Janan Janine Dietrich --- , South Africa Gugulethu Tshabalala --- , South Africa Millicent Atujuna --- , South Africa Denis Ndekezi --- , Uganda Phiona Nalubega --- , Uganda Esther Awino --- , Uganda Helen A Weiss --- , United Kingdom Julie Fox --- , United Kingdom Janet Seeley --- , UgandaPre-exposure prophylaxis (PrEP) is an HIV-prevention strategy recommended for those at high-risk of infection, including adolescents and young people (AYP). We explored how PrEP roll-out could influence sexual risk behaviour among AYP in East and southern Africa. Twenty-four group discussions... -
First assessment of the blue carbon storage of Rhizophora and Bruguiera mangrove stands on the island of Mauritius (western Indian Ocean)
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Phanesh Raghbor --- , Mauritius Linisha Devi Seeruttun --- , Mauritius Chandani Appadoo --- , MauritiusBlue carbon has gained recognition as a strategy to mitigate climate change. Mangroves allow significant amounts of carbon to be sequestered and stored and are considered an important component in the offset of greenhouse gas emissions. Despite this, little is... -
Influence of burning and defoliation on Festuca costata (Nees) in the Drakensberg
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Kabemba Mwambilwa --- , South Africa Kevin P Kirkman --- , South Africa Zivanai Tsvuura --- , South AfricaFire occurs naturally in grasslands and savannas and it is commonly used as a management tool to influence structure and composition. The ability of a grass plant to recover from fire may be influenced by the fire frequency and intensity... -
Indigenous knowledge and science-based predictors reliability and its implication for climate adaptation in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel Adu Ankrah --- , Ghana Nana Afranaa Kwapong --- , Ghana Seth Dankyi Boateng --- , GhanaThe study examined the reliability of indigenous knowledge and science-based predictors of climate and how this influences smallholder farmers’ practices and adaptations in Ghana’s three regions (Northern, Western and Volta regions). Two districts were selected in each region: Builsa South... -
Assessing infant and young child feeding priorities to inform the development of a nutrition social and behaviour change communication (SBCC) strategy during a pandemic threat
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: T Turk --- , Pakistan A Poonawala --- , Switzerland S Shulman --- , USA P Sepoloane --- , Botswana -
Warming promotes growth of seedlings of a woody encroacher in grassland dominated by C4 species
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lusanda Ncisana --- , South Africa Ntuthuko R Mkhize --- , South Africa Peter F Scogings --- , South AfricaLittle is known of warming effects on growth and defence of woody seedlings that potentially invade grasslands. We predicted that elevated temperatures would increase growth and spine length of Vachellia sieberiana seedlings growing (1) with or without grass in the... -
Thirty years of amphibian surveys in the Ukagurus Mountains of Tanzania reveal new species, yet others are in decline
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: H Christoph Liedtke --- Estación Biológica de Doñana (CSIC), Spain John V Lyakurwa --- University of Dar es Salaam, Tanzania Lucinda P Lawson --- University of Cincinnati, USA Michele Menegon --- Manchester Metropolitan University, UK Marina Garrido-Priego --- Estación Biológica de Doñana (CSIC), Spain Jean Mariaux --- Natural History Museum of Geneva, Switzerland Wilirk Ngalason --- University of Dar es Salaam, Tanzania Alan Channing --- North-West University, South Africa Nisha R Owen --- On the EDGE Conservation, UK Gabriela B Bittencourt-Silva --- Estación Biológica de Doñana (CSIC), Spain Mark Wilkinson --- Natural History Museum, UK Joanna G Larson --- University of Notre Dame, USA Václav Gvoždík --- Institute of Vertebrate Biology of the Czech Academy of Sciences, Czech Republic Simon P Loader --- Natural History Museum, UKRecords of biodiversity over time are important resources for assessing conservation priorities. However, such baseline data are missing for regions of key biodiversity importance. The Eastern Arc Mountains of Tanzania are known for their species richness and endemism, but not... -
The Elephant Marsh, Malawi – Part 1: reconstruction of the historic hydromorphology
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AL Birkhead --- , South Africa CA Brown --- , South Africa H Bukhari --- , South Africa MK Reinecke --- , South Africa WO Mgoola --- , Malawi JK Nyirenda --- , MalawiThe Elephant Marsh lies on the floodplain of the lower Shire River, in southern Malawi. It is both a cultivated, seasonal floodplain and an area of permanent shallow lakes. The marsh is highly biodiverse, has a productive fishery and supports... -
The Elephant Marsh, Malawi – Part 2: two-dimensional hydrodynamic modelling in support of an eco-social assessment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AL Birkhead --- , South Africa MK Reinecke --- , South Africa CA Brown --- , South Africa WO Mgoola --- , Malawi JK Nyirenda --- , MalawiThe Elephant Marsh lies on the floodplain of the lower Shire River, in southern Malawi. It is both a cultivated, seasonal floodplain and a wetland, characterised by a complex mosaic of meandering channels, marshland and shallow lakes. In 2016, the... -
Analysts’ stock ratings and the predictive value of news and Twitter sentiment
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: John Garcia --- , USAThis study investigates the relationship between the stock ratings of professional analysts and company-level sentiment. I find that investor sentiment expressed in tweets and news articles displays a positive relationship with professional analysts’ stock ratings and that the sentiment conveyed... -
Heterogeneous investor attention to climate risk: Evidence from a unique dataset
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Hyejin Park --- , South Korea Minki Kim --- , South Korea Doojin Ryu --- , Republic of KoreaThe COVID-19 pandemic has led global investors to draw a parallel between pandemics and climate risk, focusing their attention on climate risk. We examine COVID-19’s effect on investors’ awareness of climate risk by analysing novel trading data for Korean-listed firms... -
The information content of bond rating changes and insider trading in Korea
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Heejin Yang --- , Korea Doowon Ryu --- , KoreaThis study examines differences in insider groups’ trading behaviours based on their characteristics. We use data on high-frequency insider trading and Korean bond rating change announcements. We find that insiders actively exploit their information advantage, and their transaction behaviour differs... -
Digital transformation and new dynamics of the triple helix model
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: María del Pilar Escott Mota --- Faculty of Accounting and Administration, México Xochitl Margarira Cruz Pérez --- Autonomous University of Querétaro, Mexico Rafael Palacios --- Innovation Hub Institute, GermanyThis paper is intended to be an extension of innovation studies on the complexity of technological change and its relationship with the dynamics of the triple helix actors. Therefore, the research question is how to reduce the complexity of digital... -
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... -
Impact of liming on extractable phosphorus, exchangeable base cations, and effective cation exchange capacity of eastern Free State soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: HJJ van Zyl --- University of the Free State, South Africa CC du Preez --- University of the Free State, South AfricaSoil acidity can adversely affect wheat production in the eastern Free State, South Africa. Liming of the soils is therefore essential. The aim of this study was to establish whether extractable phosphorus (P), exchangeable calcium (Ca), magnesium (Mg) and potassium... -
L'ascenseur et l'escalier — la lutte contre le SIDA au Cameroun
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Jacques-Philippe Tsala Tsala --- Department of Psychology, University of Yaoundé I and Catholic University of Central Africa, CameroonHIV/AIDS infection has spread like wildfire in the countries of sub-saharan Africa. In order to fight that pandemic, Cameroon has organised itself by setting up, with the assistance of bilateral and multilateral partners, a national structure with the aim to... -
Establishing support groups for HIV-infected women: Using experiences to develop guiding principles for project implementation
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Maretha Visser --- Department of Psychology, University of Pretoria, Jonathan Mundell --- Kalafong Hospital,HIV-infected women need support to deal with their diagnosis as well as with the stigma attached to HIV. As part of their practical training, Master's-level psychology students negotiated with the staff of four clinics in townships in Tshwane, South Africa,... -
Condom use as part of the wider HIV prevention strategy: Experiences from communities in the North West Province, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Marije Versteeg --- University of Pretoria, Montagu Murray --- Functional Household Programme at the Faculty of Theology, University of Pretoria,Correct and consistent condom usage remains a pivotal strategy in reaching the target set by the South African government to reduce new HIV infections by 50% in the next 5 years. Studies have found that there has been an increase... -
Social capital and the decline in HIV transmission – A case study in three villages in the Kagera region of Tanzania
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Gasto Frumence --- Department of Development Studies, Muhimbili University of Health and Allied Sciences, Tanzania Japhet Killewo --- Department of Biostatistics and Epidemiology, Muhimbili University of Health and Allied Sciences, Tanzania Gideon Kwesigabo --- Department of Biostatistics and Epidemiology, Muhimbili University of Health and Allied Sciences, Tanzania Lennarth Nyström --- Department of Public Health and Clinical Medicine, Epidemiology and Global Health, Umeå University, Sweden Malin Eriksson --- Department of Public Health and Clinical Medicine, Epidemiology and Global Health, Umeå University, Sweden Maria Emmelin --- Department of Public Health and Clinical Medicine, Epidemiology and Global Health, Umeå University, SwedenWe present data from an exploratory case study characterising the social capital in three case villages situated in areas of varying HIV prevalence in the Kagera region of Tanzania. Focus group discussions and key informant interviews revealed a range of... -
Developing teacher self-efficacy via a formal HIV/AIDS intervention
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Paul Webb --- Nelson Mandela Metropolitan University, Anita Gripper --- Nelson Mandela Metropolitan University,This study investigated the effects of a HIV/AIDS module on teachers' sense of self-efficacy regarding their ability to bring about behaviours in their learners which contribute to responsible living and a reduction of the spread of HIV in their communities... -
Researching to make a difference: Possibilities for social science research in the age of AIDS
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Naydene de Lange [d99e14]HIV and AIDS is recognized as one of the most devastating pandemics of sub-Saharan Africa, and South Africa in particular, with adverse effect on individuals, families, schools, communities and society at large. Research is therefore required to provide a deeper... -
Health behaviour change of people living with HIV after a comprehensive community-based HIV stigma reduction intervention in North-West Province in South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: H. Christa Chidrawi --- , , South Africa Minrie Greeff --- , , South Africa Q. Michael Temane --- , , South AfricaAll over the world, health behaviour is considered a complex, far reaching and powerful phenomenon. People's lives are influenced by their own or others' health behaviour on a daily basis. Whether it has to do with smoking, drinking, pollution, global... -
Risky sexual behaviours among young people in sub-Saharan Africa: how can parents use the Ottawa Charter for Health Promotion for change?
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Elvis Tarkang --- , , Ghana Lilian Pencille --- , Cameroon Hubert Amu --- , , Ghana Joyce Komesour --- , , Ghana Prosper Lutala --- , , MalawiDespite progress made in the treatment of HIV and AIDS by making available the antiretroviral treatment in Africa, youth are still struggling with inadequate knowledge, a negative attitude towards AIDS and high-risk sexual behaviour. All of these are compounded by... -
Assessing sexual practices and beliefs among university students in Khartoum, Sudan; a qualitative study
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Husameddin Farouk Elshiekh --- Maastricht University, The Netherlands Hein de Vries --- Maastricht University, The Netherlands Ciska Hoving --- Maastricht University, The NetherlandsUniversity students in Sudan are more at risk of contracting HIV than the general population, due to a high rate of sexual activity and low uptake of preventive measures such as condoms. Hence, they are considered an important target for... -
Anuran amphibians in a rapidly changing environment – revisiting Lamto, Côte d'Ivoire, 40 years after the first herpetofaunal investigations
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Patrick Joël Adeba --- University of Cocody, Philippe Kouassi --- University of Cocody, Mark-Oliver Rödel --- Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, GermanyWe reinvestigated the anuran amphibian fauna of the Lamto region in Central, Côte d'Ivoire, 40 years after this fauna was assessed for the first time. During this period, the region lost about 90% of the forest cover, resulting in an... -
Using modern models to test Poynton's predictions
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Clemens Schreiner --- Zoologisches Forschungmuseum Alexander Koenig, Germany Dennis Rödder --- Zoologisches Forschungmuseum Alexander Koenig, Germany G. John Measey --- Nelson Mandela Metropolitan University, South AfricaIn his seminal work ‘The Amphibia of southern Africa: a faunal study’, Poynton identified and contrasted two centres of amphibian importance, the temperate south-western Cape (“Cape”) and tropical northeast (“Tropical”). With reference to the dominant role of climate fluctuations resulting... -
Expansion of the Grassland Biome in the eastern Karoo corresponds with changes in rainfall and livestock numbers
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G Arena --- University of Cape Town, South Africa MT Hoffman --- University of Cape Town, South Africa H van der Merwe --- University of Cape Town, South Africa TG O’Connor --- , South AfricaThe persistent spread of shrublands is a global phenomenon observed across semiarid grassland-shrubland boundaries. Observations in South Africa, however, have detected a contrasting trend of increasing grass cover across the transition between the Nama-Karoo and Grassland Biomes over the last... -
Perceived impact of climate variability and change on livelihoods of smallholder farmers in Lesotho
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Christopher Dick-Sagoe --- University of Botswana, Botswana Kwame Nkrumah Hope --- Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development, Peter Asare-Nuamah --- University of Environment and Sustainable Development, GhanaLesotho is a poor country that heavily depends on rain-fed agriculture for socioeconomic growth and development. However, climate change threatens the agriculture sector, which has implications on the ability of the country to harness its development, especially among smallholder farmers,... -
Central bank policy rate announcements and high-frequency intra-day benchmark stock returns reaction dynamics: Evidence from South Africa
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Cyril May --- University of the Witwatersrand, South Africa Tatenda Ngandu --- University of the Witwatersrand, South AfricaThis paper investigates the chronological impact of South African Reserve Bank (SARB) repo rate announcements on the Financial Times Stock Exchange/Johannesburg Securities Exchange (FTSE/JSE) All Share Index (ALSI) returns and returns volatility. Covering the period 2012–2021, the study employs the... -
A natural terminal Pleistocene decline of African penguin populations enhances their anthropogenic extinction risk
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H Beckett --- Stellenbosch University, South Africa OK Hansen --- Stellenbosch University, South Africa S von der Heyden --- Stellenbosch University, South Africa GF Midgley --- Stellenbosch University, South AfricaThe African penguin Spheniscus demersus, endemic to the coast of southern Africa, has suffered anthropogenic-driven population declines since 1900 and is now listed as Endangered on the IUCN Red List. Conservation efforts currently underway are informed by the species’ adaptive... -
Eliahou number, Wilf function and concentration of a numerical semigroup
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Patricio Almirón --- Universidad Complutense de Madrid, Spain Julio José Moyano-Fernández --- Departamento de Matemáticas & Institut Universitari de Matemátiques i Aplicacions de Castelló, SpainWe give an estimate of the minimal positive value of the Wilf function of a numerical semigroup in terms of its concentration. We describe necessary conditions for a numerical semigroup to have a negative Eliahou number in terms of its... -
Evolution of innovation systems, economic growth, and sustainable competitiveness in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bernadin Géraud Comlan Ahodode --- University of Abomey-Calavi, Benin RepublicThis paper examines the systemic relationship between triple helix innovation systems and the gross domestic product per capita growth (GDPPC) in terms of sustainable competitiveness in Africa. To do this, the Generalized Moment Method on the panel vector autoregressive model... -
Corporate social responsibility and employee knowledge sharing: The roles of organisational trust and exchange quality
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Si Qian --- Beijing Technology and Business University, China Ke Ma --- Beijing Technology and Business University, China Siqi Guo --- Beijing Technology and Business University, ChinaDrawing on the social exchange theory, this study aimed to examine the relationship between perceived corporate social responsibility (CSR) and employee knowledge-sharing behaviour, including the roles organisational trust and exchange quality play in that relationship. Survey data were collected from... -
Drought as a driver of vegetation change in Succulent Karoo rangelands, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SJ Milton --- , South Africa H Petersen --- , South Africa G Nampa --- , South Africa H van der Merwe --- , South Africa JR Henschel --- , South AfricaWe document changes in rangeland during a prolonged drought in the arid Karoo. Rangeland in this arid region is species-rich and dominated by a mixture of long-lived succulent and non-succulent shrubs. Ranching has led to the domination of vegetation by... -
Long-term study of the drought impact on the phytoplankton concentration and assemblages in two water supply reservoirs in Namibia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Johannes Sirunda --- Namibia Water Corporation, Namibia Paul Oberholster --- University of the Free State, South Africa Gideon Wolfaardt --- Stellenbosch University, South Africa Christoff Truter --- Toronto Metropolitan University, Canada Sean van der Merwe --- University of the Free State, South AfricaRising temperatures and increased occurrences of droughts, brought on by climate change, are expected to affect reservoir water levels. We hypothesised that the decrease in reservoir volumes in dams with desert climates will favour the growth of phytoplankton biomass, measured... -
I’m betrayed and I’m gone – unless organizational leaders convince me otherwise: Perceived contract breaches, quitting intentions, and leader-related resources
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Dirk De Clercq --- Brock University, Canada Renato Pereira --- ISCTE Instituto Universitário de Lisboa, PortugalEmployees’ perceptions that their organization has not met its promises toward them (i.e., perceived contract breaches) might inform their turnover intentions, in a link that also could be moderated by four relevant leader-related resources – two that reflect how organizational... -
The influence of grass competition and soil moisture on the growth and phenology of Karoo shrubs in the Eastern Upper Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lisa Hebbelmann --- , South Africa Timothy G O’Connor --- , South Africa Justin CO du Toit --- Grootfontein Agricultural Development Institute, South AfricaRainfall in the Nama-Karoo is sporadic and a plant’s ability to access and utilise available soil moisture will determine its ability to persist in the system and to successfully recruit. When summer rainfall in the Eastern Karoo increases, grassiness increases... -
Calculating soil titratable acidity from routine soil analyses of cultivated South African soils using various model structures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: VG White --- Citrus Research International, South Africa PJ Raath --- Citrus Research International, South Africa AG Hardie --- Stellenbosch University, South Africa V van der Berg --- Stellenbosch University, South Africa GF Sutton --- Rhodes University, South AfricaSoil titratable acidity (TA) is determined through extraction with an acetate-buffered salt solution (potassium sulphate, K2SO4) and is routinely used to predict the soil lime requirement using the Eksteen method. Soil TA is not always reported by commercial soil testing... -
Experiencing the uncertainty of development: ethnographic notes from central and northern Mozambique
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Jose Adalima --- Eduardo Mondlane University, Mozambique Elísio Jossias --- Eduardo Mondlane University, MozambiqueIn this paper, we critically evaluate the insertion of anthropologists in the field in two locations in central and northern Mozambique, focusing on the negotiation and production of ethnographic data in contexts of uncertainty. The anthropologists entered the field sites... -
Quantile dependencies across BRICS currency markets in time of crisis: Analysis of the Russia–Ukraine war
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Oluwatomisin J. Oyewole --- Federal University of Agriculture, Nigeria Ismail O. Fasanya --- University of the Witwatersrand, South Africa Mamdouh Abdulaziz Saleh Al-Faryan --- School of Accounting, Economics and Finance, Faculty of Business and Law, University of Portsmouth, UK & Consultant in Economics and Finance, Saudi ArabiaThis paper examines the spillovers across BRICS currency markets during the Russia–Ukraine war. We observe that the connectedness across the BRICS currency markets is stronger during than before the war and the average-based connectedness framework shows a moderate level of... -
The effects of habitat loss and fragmentation on the relative abundance and conservation of Ludwig’s Bustard Neotis ludwigii in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Steven W Evans --- North-West University, South AfricaLudwig’s Bustard Neotis ludwigii is near-endemic to the semi-arid shrublands of southwestern southern Africa and is listed as Endangered. The primary threat to this species is collisions with overhead powerlines; however, loss and fragmentation of its habitat may contribute to... -
Job insecurity and employee commitment during COVID-19: mediating the role of quitting intention in family-owned hotels
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Esther Theresa Appaw-Agbola --- Ho Technical University, Ghana Jennifer Eyram Nkrow --- Ho Technical University, Ghana Elikem Krampa --- Ho Technical University, GhanaUsing the social exchange theory, this article explores how quitting intention mediates job insecurity and organisational commitment in family-owned hotels during the COVID-19 period in Ghana. A conceptual model was developed to give a clear perspective of the study. Literature... -
Humble leadership and follower strengths use: Leader-member exchange as a mediator and role overload as a moderator
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: --- School of Economics and Management, North China Electric Power University, China --- School of Economics and Management, North China Electric Power University, China --- School of Economics and Management, North China Electric Power University, ChinaBased on the conservation of resources (COR) theory, this study explores the mediating effect of leader-member exchange (LMX) and the moderating effect of role overload in the relationship between humble leadership and follower strengths use. We collected data from 230... -
Regenerative economy: A pathway to a future-ready, sustainable Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Judith L. Walls --- Institute for Economy and the Environment, University of St.Gallen, Switzerland Leo Luca Vogel --- University of St.Gallen, SwitzerlandAfrica is experiencing a period of rapid economic growth, booming population, and migration as biodiversity is deteriorating and the climate is warming. Together, these represent grand societal and environmental challenges. The African Union and the United Nations both promote sustainable... -
Dynamics of tall fescue (Festuca arundinacea) and Kikuyu grass (Cenchrus clandestinus) pastures associated with white clover (Trifolium repens) in small-scale dairy systems in the highlands of central Mexico
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: --- Instituto de Ciencias Agropecuarias y Rurales (ICAR), Universidad Autónoma del Estado de México (UAEM), México --- Instituto de Ciencias Agropecuarias y Rurales (ICAR), Universidad Autónoma del Estado de México (UAEM), México --- , México --- Instituto de Ciencias Agropecuarias y Rurales (ICAR), Universidad Autónoma del Estado de México (UAEM), MéxicoAn on-farm participatory study was undertaken to assess changes over seasons on the availability, botanical and morphological composition, and nutritive value of herbage from two pastures in small-scale dairy systems in the highlands of central Mexico. One pasture (TF-33) was... -
A systematic review of remote sensing and machine learning approaches for accurate carbon storage estimation in natural forests
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Collins Matiza --- University of KwaZulu-Natal, South Africa Onisimo Mutanga --- University of KwaZulu-Natal, South Africa Kabir Peerbhay --- University of KwaZulu-Natal, South Africa John Odindi --- University of KwaZulu-Natal, South Africa Romano Lottering --- University of KwaZulu-Natal, South AfricaThe assessment of carbon storage in natural forests is paramount in the ongoing efforts against climate change. While traditional field-based methods for quantifying carbon storage pose challenges, recent advancements in remote sensing and machine learning offer efficient and innovative alternatives... -
Woody biomass increases across three contrasting land uses in Hurungwe, mid-Zambezi valley, Zimbabwe
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Tatenda Gotore --- , Zimbabwe Sam Bowers --- University of Edinburgh, United Kingdom Hilton GT Ndagurwa --- National University of Science and Technology, Zimbabwe Shakkie Kativu --- University of Zimbabwe, Zimbabwe Anderson Muchawona --- , Zimbabwe Pomerayi Mutete --- , Zimbabwe Mduduzi Tembani --- , Zimbabwe Ruramai Murepa --- , Zimbabwe Admore Mureva --- Bindura University of Science Education, Zimbabwe Casey Ryan --- University of the Witwatersrand, South Africa Denis Gautier --- Université Montpellier, France Laurent Gazull --- Université Montpellier, FranceGlobally, Miombo woodlands store important quantities of carbon, with tree cover and carbon stocks strongly determined by human use. We assessed woodland cover and aboveground carbon (AGC) stocks of miombo along a utilisation gradient on three different land use types,... -
Farmers’ choices and factors driving adoption of climate change adaptation strategies in saline coastal area of Bangladesh
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mst. Esmat Ara Begum --- Bangladesh Agricultural Research Institute, Bangladesh Md. Abdur Rashid --- Bangladesh Agricultural Research Institute, Bangladesh Mohammad Ismail Hossain --- Bangladesh Agricultural University, Bangladesh Md. Anower Hossain --- Bangladesh Agricultural Research Institute, Bangladesh Md. Harunor Rashid --- Bangladesh Agricultural Research Institute, Bangladesh Mustafa Kamal Shahadat --- Bangladesh Agricultural Research Institute, Bangladesh Mohammed Mainuddin --- Water Security Program, CSIRO Environment, AustraliaGrowing climate change adaptation issues are driving the demand for efficient solutions in the agriculture sector, which will improve farmers’ livelihoods and economic situations. This study examined the perceptions of major climate risks and factors driving adoption of climate adaptation... -
Participatory establishment of Cenchrus ciliaris forage grass among pastoralists in a semi-arid rangeland area of eastern Tanzania
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Onesmo Damian Ngenzi --- Sokoine University of Agriculture, Tanzania Peter Rogers Ruvuga --- , Tanzania George Mutani Msalya --- Sokoine University of Agriculture, Tanzania David Dawson Maleko --- Sokoine University of Agriculture, TanzaniaIn the semi-arid areas of Africa many pastorallsts move their livestock to find better grazing when forage is scarce during the dry season. However, the practice of forage cultivation can sustain fodder supply for effective livestock feeding during these times... -
Integration of nutrition support using the FIGO nutrition checklist in the Bukhali trial: a dietitian’s perspective
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Lethabo Mogashoa --- University of the Witwatersrand, South Africa Shane A Norris --- University of the Witwatersrand, South Africa Khuthala Mabetha --- University of the Witwatersrand, South Africa Larske Soepnel --- University of the Witwatersrand, South Africa Catherine E Draper --- University of the Witwatersrand, South AfricaThe burden of malnutrition experienced globally, coupled with the increasing rate of micronutrient deficiencies, compromises the health and well-being of women during their reproductive years. Obesity places young South African women at particular risk during pregnancy, and increases obesity risk... -
Susceptibility of dwarf chameleons to climate and land use change: a vulnerability framework for conservation planning
Item type: Journal Article • Journal: African Zoology • Authors: Tyron K Clark --- University of the Witwatersrand, South Africa Graham J Alexander --- University of the Witwatersrand, South Africa Krystal A Tolley --- South African National Biodiversity Institute, South AfricaClimate and land use changes are eroding biodiversity globally, and reptiles are highlighted as being particularly susceptible. In South Africa, global changes threaten the persistence of an assemblage of dwarf chameleons (Bradypodion) located in a biodiversity hotspot. We used ecological... -
Quantile dependencies between exchange rate volatility and sectoral stock returns in South Africa
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Darren Mubaiwa --- University of the Witwatersrand, South Africa Ismail Fasanya --- University of the Witwatersrand, South AfricaThis study assesses the effect of USD-Rand exchange rate volatility on South African sectoral stock returns between 29 March 1996 and 28 July 2022. Using the quantile-on-quantile regression (QQR) technique, we uncover that, although each of the sectors exhibit important... -
Integrating “old” truths and “new” evidence to address people's evolving career counselling needs
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jacobus G. Maree --- University of Pretoria, South AfricaThe article examines the link between career counselling waves, helping models, theoretical foundations, and interventions. An adapted qualitative systematic literature review was conducted to facilitate examination of people's evolving career counselling needs during changes in the workplace with a view... -
Carbon storage in a dry Miombo woodland area in Tanzania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ezekiel Edward Mwakalukwa --- Sokoine University of Agriculture, Tanzania Henrik Meilby --- Copenhagen University, Denmark Thorsten Treue --- Copenhagen University, DenmarkA persistent need exists, both politically and academically, for knowledge on carbon storage and sequestration potentials of forest ecosystems and their contributions to the global carbon balance. This study assessed carbon stocks of a 6 065 ha dry Miombo woodland... -
Debt financing and growth of Ghanaian family-owned businesses: The dual role of family values
Item type: Journal Article • Journal: Africa Journal of Management • Authors: J. K. Dartey --- Doctorate Division, Nobel International Business School, Ghana J. Okeniyi --- Creative Enterprise Department, School of Business and Creative Industry, University of West of Scotland, UK S. E. Samuel --- School of Business, Law and Social Sciences, Abertay University, UK E. Peregrino-Dartey --- Business Administration, Walden University, USA C. Cobblah --- Doctorate Division, Nobel International Business School, GhanaThis study investigates how family values can create finance and growth challenges for family-owned businesses in emerging economies. Specifically, it explores the interplay between family values, debt financing, and firm growth, while also considering the moderating role of self-enhancement and... -
Repositioning ‘woman’ in Nwapa’s Efuru and Emecheta’s Joys of Motherhood
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Sifiso Sibanda --- North-West University, South AfricaThis paper focuses on Nwapa and Emecheta’s transformative representation of their heroines in Efuru and The Joys of Motherhood, respectively. In these two works, the authors seek to reposition ‘woman’ and inaugurate her as a formidable force of change. They... -
How open are African inventors? Open green technologies and patenting activities in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Maruf Sanni --- Obafemi Awolowo University, Nigeria Yeong Jae Kim --- KDI School of Public Policy and Management, Republic of KoreaOpen green innovation is essential to accelerate decarbonization in Africa. The dearth of empirical evidence on the current trajectory of green innovation in Africa often hinders appropriate green innovation policy design. This study investigates the incidence of collaboration in inventive... -
Wildlife corridors in a Southern African conservation landscape: the political ecology of multispecies mobilities along the arteries of anthropogenic conservation
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Michael Bollig --- University of Cologne, GermanyThe decline of biodiversity is a key topic in public discussions around the globe. These debates have triggered massive efforts to increase protected areas and to safeguard the corridors connecting them. The wildlife corridors dealt with in this article are... -
How does social media use affect employee voice behaviour?
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Guolong Zhao --- LNU & CAITEC China Business Development Institute (Beijing), ChinaSocial media has become an increasingly important tool for employees to communicate and share their opinions. Yet, there are still some gaps in the social media use research. We investigated leader–member exchange and voice efficacy mediation of social media use... -
Give full play to the overqualified individuals: Do job crafting and leader–member exchange matter?
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Xiaoyu Wu --- Business School, Beijing Technology and Business University, China Wenwen Han --- Business School, Beijing Technology and Business University, China Xiaoyan Zhang --- Business School, Beijing Technology and Business University, China Fang Ma --- Anqing Antong Construction Group Co., Ltd, ChinaDrawing upon psychological contract theory, this study investigated how and when perceived overqualification may affect employees’ creativity. Data were collected from 164 employees and their immediate supervisors in Chinese manufacturing, information technology (IT), and services companies (female = 53.05%; age... -
Variations in the heart rate of Mediterranean mussels Mytilus galloprovincialis and brown mussels Perna perna under thermal stress on rocky shores of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: K Beine --- University of Johannesburg, South Africa LJ Connell --- University of Johannesburg, South Africa R Greenfield --- University of Johannesburg, South AfricaIntertidal mussels experience prolonged emersion during low tide, followed by rapid submergence cooling during high tide, causing temperature-induced stress responses. This study examined variations in heart rate to investigate the relationship between emerged and submerged thermal stress in Mediterranean mussels... -
Using stakeholder knowledge to co-produce research priorities for a raptor species vulnerable to impacts of wind energy facilities
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Merlyn Nomusa Nkomo --- University of Cape Town, South Africa Megan Murgatroyd --- University of Cape Town, South Africa Samantha Ralston-Paton --- , South Africa Arjun Amar --- University of Cape Town, South AfricaThe global energy transition necessitates a rapid increase in infrastructure in developing countries, including for wind energy facilities (WEFs). Concerns arise regarding the negative impacts of WEFs on biodiversity, especially on birds of prey or raptors and other volant animals... -
Adapting Altman Z-score models for early warning signals: Evidence from delisted mining stocks on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Nigel Matanga --- University of Cape Town, South Africa Glen Holman --- University of Cape Town, South AfricaThe aim of the study is to measure the predictive prowess of adapting the Altman’s Z-score models when used to predict financial health and subsequent delisting of mining companies listed on the Johannesburg Stock Exchange between 1994 and 2021. The... -
Greenhouse gas concentrations in tropical wetlands of the Cross River estuary, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AB Andem --- University of Calabar, Nigeria OB Ojo --- University of Calabar, Nigeria RA Odey --- University of Calabar, Nigeria GE Eni --- University of Calabar, Nigeria OR Ibor --- University of Calabar, Nigeria IA Iwara --- University of Calabar, Nigeria VO Eyo --- Nigerian Maritime University, NigeriaThe Cross River estuary is a coastal wetland in the south-eastern part of the Niger Delta region of Nigeria with its hydrological cycle largely dependent on precipitation. The purpose of this study was to determine the greenhouse gas (GHG) concentrations... -
Calibration and evaluation of a CROPGRO Perennial Forage Model for Brachiaria humidicola yield simulation under future climate in subhumid environments of Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Fantahun Dereje --- Wallaga University, Ethiopia Ashenafi Mengistu --- Addis Ababa University, Ethiopia Diriba Geleti --- Ethiopian Institute of Agricultural Research, Ethiopia Fekede Feyissa --- Ethiopian Institute of Agricultural Research, Ethiopia Diriba Diba --- Wallaga University, Ethiopia Diego Pequeno --- , Mexico Buzunesh Tesfaye --- Wallaga University, EthiopiaCrop simulation models can be employed to assess the impacts of climate change and aid in strategic planning and decision making regarding forage strategies. This study focused on calibrating and assessing the performance of the CROPGRO Perennial Forage Model in... -
A review of the contribution of the Grassland Society of Southern Africa to understanding conservation and wildlife research and management in southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Mike JS Peel --- Agricultural Research Council – Animal Production Institute, South Africa Peter JK Zacharias --- , South AfricaWe identified 440 papers and 81 book reviews published chronologically by the Grassland Society of Southern Africa (GSSA) over 60 years, determined as making a contribution to understanding the drivers and response variables affecting the management and use of grassland... -
Adapting to climate change amidst innovation diffusion and declining indigenous agricultural knowledge and practices in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Pius Siakwah --- University of Ghana, Ghana Austin Dziwornu Ablo --- University of Ghana, Ghana Rosina Sheburah-Essien --- University of Ghana, Ghana Mariama Zaami --- University of Ghana, Ghana Joseph Awetori Yaro --- University of Ghana, GhanaThis paper examines how farmers adapt to climate change through innovation diffusion amidst declining indigenous agricultural knowledge and practices in Ghana. Small-scale farmers rely on indigenous practices and technological diffusion to cope with change even where the adoption levels of... -
Prevalence of mixed dermatophyte and non-dermatophyte onychomycosis in surveillance of patients with diabetes living in a sub-tropical climate and association with selected diabetes foot ulcer risk factors
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: AT Thompson --- University of KwaZulu-Natal, South Africa C Aldous --- University of KwaZulu-Natal, South Africa -
Nominalisation and semantic shift in selected isiXhosa nouns
Item type: Journal Article • Journal: South African Journal of African Languages • Authors: Andiswa Mvanyashe --- Nelson Mandela University, South AfricaThis study addresses the process of nominalisation in isiXhosa to establish its historical development and implications on the writing and sense of words. Nominalisation, an important feature of scientific writing, enables information concentration as well as grammatical functions such as... -
The incidence of Electrocardiographic (ECG) changes suggestive of myocardial infarction in patients attending Kalafong Provincial Tertiary Hospital diabetes clinic
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: BN Xhekwani --- Kalafong Provincial Tertiary Hospital, South Africa M de Villiers --- Kalafong Provincial Tertiary Hospital, South Africa DG van Zyl --- Kalafong Provincial Tertiary Hospital, South AfricaAims: This study aims to determine the incidence of new electrocardiographic (ECG) changes suggestive of myocardial infarction (MI) in diabetic patients, both with and without typical symptoms. Additionally, it seeks to identify other ECG abnormalities indicative of the effects of... -
Assessing the adoption potential of online currency exchange systems: A case study of currency dealers in Mogadishu, Somalia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mohamed Ibrahim Nor --- SIMAD University, Somalia Abdifatah Farah Ali --- SIMAD University, SomaliaThis study investigates the readiness of currency dealers in Somalia to adopt online currency exchange systems, addressing the research question: What factors influence the acceptance and adoption of online currency exchange platforms in an unregulated market? Using a quantitative approach,... -
Long-term temporal patterns of human-carnivore conflict in the Chobe Enclave, northern Botswana
Item type: Journal Article • Journal: African Zoology • Authors: Gosiame Neo-Mahupeleng --- Botswana University of Agriculture and Natural Resources, Botswana Richard Fynn --- Okavango Research Institute, University of Botswana, Botswana Moseki Ronald Motsholapheko --- Okavango Research Institute, University of Botswana, Botswana Matshelo Makondo --- , Botswana Kaelo Nkile --- , Botswana Reneilwe Dipheko --- , Botswana Graham IH Kerley --- Centre for African Conservation Ecology, Nelson Mandela University, South AfricaIn some areas, human and carnivore livelihoods overlap causing human-carnivore conflict (HCC), hence there is a need for carnivore conservation efforts. The decline of most large carnivore populations are linked to HCC, primarily due to the killing of carnivores by... -
Health promotion messaging reduces HIV risk behaviours and improves repeat testing among adolescent girls and young women in Kenya
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Marylyn Ochillo --- Impact Research and Development Organization, Kenya Risper Bosire --- Impact Research and Development Organization, Kenya Nicky Okeyo --- Impact Research and Development Organization, Kenya Jacob Onyango --- Impact Research and Development Organization, Kenya Kawango Agot --- Impact Research and Development Organization, Kenya Nok Chhun --- University of Washington, USA Samwel Rao --- Impact Research and Development Organization, Kenya Ann Kurth --- The New York Academy of Medicine (NYAM), USA Irene Inwani --- University of Nairobi, KenyaAdolescents and young people in sub-Saharan Africa account for about a third of persons newly diagnosed with HIV. Health communication, through mobile health (mHealth) can improve access to sexual and reproductive health information, health services and reduce risky sexual behaviours... -
The impact of entrepreneurial cognition on opportunity-capitalizing capabilities and business model change: Evidence from Egypt
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Nancy Bouchra Hanna --- Amity University Dubai, UAE Erich Zahn --- University of Stuttgart, Germany Hadia H. Abdel Aziz --- Universities of Canada, Egypt Christine Madonna Kirkland --- Western Carolina University, USA R. Michael Holmes --- Florida State University, USAThis study advances the upper echelons literature by examining the (a) cognitive microfoundations of business model change and (b) intervening organizational mechanisms that help to explain the influence of strategic leaders on firm outcomes. We develop our theory by considering... -
The influence of selected non-financial and macroeconomic determinants on delistings in South Africa
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Peter Lansdell --- University of Johannesburg, South Africa Ilse Botha --- University of Johannesburg, South Africa Ben Marx --- University of Johannesburg, South AfricaThis study explores the factors possibly driving delisting from the Johannesburg Stock Exchange (JSE) in South Africa, focusing on selected non-financial and macroeconomic determinants. Using data from 2010 to 2023, the analysis covers 302 delisted companies and a matched control... -
Factors driving pre-exposure prophylaxis uptake among students at six Gauteng province universities: An application of Pender’s Health Promotion Model
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Paul Potsane --- University of Johannesburg, South Africa Charlene Downing --- University of Johannesburg, South Africa Patrick Ndayizigamiye --- College of Business & Economics, University of Johannesburg, South AfricaBackground: South Africa has the world’s highest HIV prevalence rate (12.7%), with university students disproportionately affected. While HIV Pre-Exposure Prophylaxis (PrEP) is an effective preventive measure for high-risk individuals, its uptake among university students remains low, which hinders progress toward... -
Comparison of three methods to assess pre-harvest sprouting in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: SI Hull --- Stellenbosch University, South Africa PA Swanepoel --- Stellenbosch University, South Africa WC Botes --- Stellenbosch University, South Africa C Mutengwa --- University of Fort Hare, South AfricaPre-harvest sprouting (PHS) in wheat (Triticum aestivum L.) is an increasing concern, as climate variability alters rainfall patterns and air temperatures during harvest, intensifying risk in many cereal-producing regions. The untimely germination of the grain, PHS, is caused by germination... -
Phosphorus and nitrogen fertiliser effects on anion-exchange-resin phosphorus and sugarcane yield in Plinthic soils of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sandile Siphesihle Mthimkhulu --- Mangosuthu University of Technology, South Africa Sizwe Vincent Mbona --- Durban University of Technology, South AfricaEfficient phosphorus (P) extraction methods are vital for optimising sugarcane production, yet no single chemical extractant currently suits the diverse soil conditions across South Africa’s sugarcane regions. This study explored the potential of anion-exchange-resin phosphorus (AER-P) as a possible alternative... -
Macrofauna assemblages and their relationships with environmental parameters in mangroves of Kribi, Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Vanessa Maxemilie Ngo-Massou --- High Teacher’s Training College, University of Yaoundé I, Cameroon Ernest Flavien Kottè-Mapoko --- Institute of Fisheries and Aquatic Sciences at Yabassi, The University of Douala, Cameroon Guillaume Léopold Essomè-Koum --- Institute of Fisheries and Aquatic Sciences at Yabassi, The University of Douala, Cameroon Elegbede Isa Olalekan --- Lagos State University, Nigeria Boubakary --- The University of Maroua, Cameroon Laurant Nyamsi-Moussian --- The University of Douala, Cameroon Alphonse Konango-Samè --- The University of Douala, Cameroon Ophman Nsame-Bile --- The University of Douala, Cameroon Wendy Loys Keedi-A-Bougen --- The University of Douala, Cameroon Joseph Lebel Tamesse --- High Teacher’s Training College, University of Yaoundé I, Cameroon Ndongo Din --- The University of Douala, CameroonChanges in composition, abundance and distribution of macrofaunal assemblages are subject to environmental influences. However, the effects of ecological disturbance on mangrove habitats in Cameroon have not been sufficiently studied with regard to macrofaunal assemblages. This work aims to identify...
