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Genetic Improvement of Timber Yield and Wood Quality in Eucalyptus Grandis (Hill) Maiden
Item type: Journal Article • Journal: South African Forestry Journal • Authors: G. van Wyk --- Division of Forest Science and Technology,Results of a partial diallel progeny test of Eucalyptus grandis assessed at ages 5, 36, 60 and 105 months are presented. Large genetic variations among full-sib families were found for all traits studied, e.g. the mean tree volume per family... -
The Hydrological Effects of a Wildfire in a Eucalypt Afforested Catchment
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.F. Scott --- Division of Forest Science and Technology, Jonkershoek Forestry Research Centre, RSA R.E. Schulze --- Department of Agricultural Engineering, RSAA high-intensity wildfire through a humid, upland catchment which was partially afforested to Eucalyptus fastigata, markedly increased stormflows and caused high soil losses off the afforested slopes. Total streamflow yield was unchanged but baseflow was reduced after the fire. The... -
The performance of tropical pastures in the drier phase of the Highland sourveld of Natal
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.M. Brockett --- Department of Agriculture (Natal Region), N.N. Gray --- Department of Agriculture (Natal Region),Several tropical grasses (Acroceras macrum, Cenchrus ciliaris, Cyndon sp., Digitaria sp. and Pennisetum clandestinum) and legumes (Desmodium uncinatum and Lotononis bainesii) were evaluated at the Kokstad Research Station (Bioclimatic sub‐region 4f of Natal) over a period of seven years. The... -
Recent trends in grazing management philosophy in South Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N.M. Tainton --- Department of Grassland Science,Reasoned argument by researchers in veld management in South Africa and elsewhere has not generally supported a number of contentious recommendations made in recent years in the popular and semi‐popular press. The only major changes to general management thinking has... -
A preliminary investigation of area‐selective grazing in the Southern Tall Grassveld of Natal
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.P. Hatch --- Department of Grassland Science, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaThe consequences of area‐selective grazing by cattle under three stocking rates and at two sites in the Southern Tall Grassveld of Natal were investigated. Soil compaction was found to significantly distinguish area‐selected patches from non‐selected veld (P≤0.01), while non‐significant differences... -
Habitat preferences of twenty‐three grass species in the Bankenveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: F.P. Jordaan --- Department of Agricultural Development, Highveld Region, Republic of South Africa A.S. de Beer --- Department of Agricultural Development, Highveld Region, Republic of South AfricaSome grass species occur more frequently in certain habitats than in others. There is, however, uncertainty as to exactly which factors are responsible for this phenomenon. Species composition as well as habitat data were collected from plots situated on the... -
Preliminary studies on the inheritance of atrazine tolerance in maize (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.R. Le Court De Billot --- Department of Plant Production, A.P. Fourie --- Department of Plant Production, P.C. Nel --- Department of Plant Production,Thirty-three maize (Zea mays L.) inbreds were screened for tolerance to atrazine (2-chloro-4-ethylamino-6- isopropylamino-1,3,5-triazine) in a glasshouse using a sand culture technique. Tolerance ranged from 95,7–51,0% of the control. The continuous pattern of tolerance exhibited by the inbreds indicated polygenic... -
Proposed regression model for calculating optimum crop levels of apple trees
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O. Bergh --- , Republic of South AfricaThe value per ton of Golden Delicious, Granny Smith, Starking and Starkrimson fruit was calculated by assigning values per carton to each of six size groups of fruit harvested from individual trees in experimental orchards during the four seasons 1978/79... -
Inheritance of atrazine tolerance in South African maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.R. Le Court De Billot --- , Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South Africa H.O. Gevers --- , Republic of South AfricaForty-five maize (Zea mays L.) inbreds were screened for tolerance to atrazine (2-chloro-4-ethylamino-6- isopropylamino-1, 3, 5-triazine) in a glasshouse using a sand culture technique. Ten inbreds displaying a spectrum of tolerance were hybridized in all possible combinations including reciprocals to... -
Effect of triadimefon on fruit set and seed development of ‘Starking Delicious’ apple
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G. Jacobs --- Department of Horticulture, Republic of South Africa L. Gouws --- Department of Horticulture, Republic of South Africa D.K. Strydom --- Department of Horticulture, Republic of South AfricaSpray applications of triadimefon (TDF) (1–4 chlorophenoxy 3,3 dimethyl 1–1-H-1,2,4 triazol 1-yl-2 butanone) (5% W.P.) at 100 mg dm−3 active ingredient at full bloom and pre- and/or post-full bloom on ‘Starking Delicious’ apple trees (Malus domestica Borkh.) increased fruit set... -
Effects of 2,4-D iso-octyl ester on the morphology, chlorophyll content and dry mass of lettuce and tomato seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.R. Meinhardt --- Department of Agricultural Development, Republic of South Africa L.P. van Dyk --- Department of Agricultural Development, Republic of South AfricaTomato and lettuce seedlings were exposed to 1 or 3 mm of simulated rainfall containing the auxin-type herbicide 2,4-D iso-octyl ester. They were then evaluated weekly for damage according to symptoms and chlorophyll content. In addition, dry matter production was... -
Maize response to Langebaan rock phosphate—superphosphate mixtures under glasshouse conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.R. Thibaud --- Summer Grain Sub-Centre, Republic of South Africa M. P.W. Farina --- Summer Grain Sub-Centre, Republic of South Africa J.C. Hughes --- Department of Agronomy, Republic of South Africa M.A. Johnston --- Department of Agronomy, Republic of South AfricaA previous investigation showed that Langebaan rock phosphate (Langfos) was not an effective substitute for superphosphate. However, in the light of reports that P availability is enhanced when phosphate rock (PR) and monocalcium phosphate are combined, an improvement in Langfos... -
Stimulation and suppression of mineralisation and nitrification in incubated soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Agrella --- Department of Plant Production and Soil Science, South Africa P. Boeckx --- Department of Applied Analytical and Physical Chemistry, Belgium A.S. Claassens --- Department of Plant Production and Soil Science, South Africa O. Van Cleemput --- Department of Applied Analytical and Physical Chemistry, BelgiumPriming, induced through the addition of oxidisable organic matter, releases or immobilises nitrogen and other nutrients in the soil. Moisture plays a very important role in priming as it stimulates microbial activity after a dry soil is wetted, especially with... -
Winter cover crops and fertiliser effects on the weed seed bank in a low-input maize-based conservation agriculture system
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E Dube --- Department of Agronomy, Faculty of Science and Agriculture, South Africa C Chiduza --- School of Agricultural Sciences, Faculty of Agriculture, Science and Technology, South Africa P Muchaonyerwa --- School of Agricultural, Earth and Environmental Sciences, South Africa M Fanadzo --- Department of Agronomy, Faculty of Science and Agriculture, South Africa TS Mthoko --- Department of Agronomy, Faculty of Science and Agriculture, South AfricaThis study investigated the effects of grazing vetch (Vicia dasycarpa L.) and oat (Avena sativa L.) cover crops and fertiliser on the seed bank of some problematic weeds in a maize-based conservation agriculture system. Soil sampling for seed bank analysis... -
Changes in abundance of the northern Benguela sardine stock during the decade 1990–2000, with comments on the relative importance of fishing and the environment
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: D. C. Boyer H. J. Boyer I. Fossen A. KreinerThe northern Benguela stock of sardine Sardinops sagax used to be considered one of the major clupeoid stocks of the world; it supported an average annual catch of >700 000 tons throughout the 1960s. The stock has been in a... -
TOXIN EXTRACTION FROM THE BLUE-GREEN ALGA MICROCYSTIS AERUGINOSA BY DIFFERENT EXTRACTION MEDIA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: A.J. van der Westhuizen --- Department of Botany, South Africa J.N. Eloff --- Department of Botany, South AfricaThe extractability of toxin from Microcystis aeruginosa isolate UV-006 by different extraction media such as O, 1N HC1, 2N CH3COOH, Triton X-100 and water at different pH levels was investigated. The best recovery of toxin was achieved with water at... -
THE ZOOBENTHOS OF THE TOUW RIVER FLOODPLAIN
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.R. DAVIES --- Institute for Freshwater Studies, Republic of South AfricaAn eighteen month study (January 1979 - June 1980) of the sediment, emergent and submerged plant-associated benthic macro-invertebrates of the western sector of the Touw River Flood-plain is reported for four study sites: Wilderness Lagoon, the Touw River and East... -
THE BENTHIC MACROINVERTEBRATE FAUNA OF A SOUTH AFRICAN MOUNTAIN STREAM AND ITS RESPONSE TO FIRE
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: D.L. Britton --- Freshwater Research Unit, Zoology Department, South AfricaThe effects of a late-summer prescribed burn on the temperature and benthic macroinvertebrate fauna of a south-western Cape mountain stream were investigated over a period of 12 months. Temperature and discharge regimes appear well-defined and relatively predictable from year to... -
Effect of Balanites glabra canopy cover on grass production, organic matter and soil moisture in a southern Kenyan rangeland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: VO Wasonga RK Ngugi DM Nyariki G Kironchi TJ NjokaA study was undertaken in Kenya's southern savanna rangelands to determine the seasonal effect of Balanites glabra canopy cover on aboveground grass biomass, grass species composition, soil organic matter and soil moisture content. The study was conducted during the period... -
Research note: Quantification of the effects of defoliation on grass vigour
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: K.P. Kirkman --- Department of Agriculture, Republic of South Africa A. Moore --- , Republic of South AfricaThe quantification of defoliation effects on grass vigour is important in understanding veld response to differential management. Effect of grazing on vigour can be determined by measuring regrowth during the season following grazing and comparing treatments with an undefoliated control... -
Violence Against Children and the Effect on Education
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Jane Amunga --- Masinde Muliro University of Science and Technology, Kenya Julius Maiyoa --- Masinde Muliro University of Science and Technology, Kenya Judy Achokaa --- Masinde Muliro University of Science and Technology, Kenya Irene Ashioya --- Masinde Muliro University of Science and Technology, KenyaThe study investigated the types of violence and the effect on children's education in Kakamega district, Kenya. Participants were 150 children (58 males, 92 females; age range up to 17 years). Data were collected using a questionnaire. Analysis was done... -
The Transportability and Utility of Cognitive Therapy in South African Contexts: A Review
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Charles Young --- Rhodes University, South AfricaCognitive therapy could be more widely promoted in South Africa given the great disparity between the need and provision of psychological therapies. Three possible objections to the promotion of cognitive therapy are considered: uncertainty surrounding the effectiveness of cognitive therapy... -
Aspects of Alcohol Use at a South African University Campus
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Almon Shumba --- Central University of Technology, South Africa Sikhululekile Ncube --- University of Fort Hare, South AfricaThis study sought to investigate aspects of alcohol use by students attending a South African university. A convenience sample of 40 students (20 male, 20 female; aged 20–30 years.) participated. Data were collected using a self-administered questionnaire and interviews in... -
Lived Experiences of Informal Settlers in Peri-Urban Districts in Zimbabwe
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Excellent Chireshe --- Great Zimbabwe University, Zimbabwe Takupiwa Nyanga --- Great Zimbabwe University, Zimbabwe John S. Mapfumo --- Africa University, Zimbabwe Regis Chireshe --- University of South Africa,The study explored the lived experiences of informal settlers in two peri-urban cities of Zimbabwe (n=53, males=19, females=34; Age range 18 to 76 years). The settlers self-reported on aspects of wellbeing, including perceived neighborliness of habitats. Data were thematically analyzed... -
Workplace ART programmes: Why do companies invest in them and are they working?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Gavin GeorgePrevalence data indicates that certain sectors within the private sector are particularly affected by HIV/AIDS. Companies in southern Africa began implementing treatment programmes in early 2002 as the corporate sector came to realise the financial imperative of offsetting employee morbidity... -
The making of vulnerabilities: understanding the differentiated effects of HIV and AIDS among street traders in Warwick Junction, Durban, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: May Chazan Alan WhitesideThe end of apartheid in South Africa has led to political-economic transition, the deregulation of cities, and increased population mobility, with growing numbers of people living and working in sub-standard and 'informal' urban conditions. These processes have created a fertile... -
Personal coping strategies for managing the side effects of antiretroviral therapy among patients at an HIV/AIDS clinic in Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Rogers Kyajja --- , Uganda Joshua Kanaabi Muliira --- , Uganda Elizabeth Ayebare --- , UgandaThe side effects of antiretroviral (ARV) medications negatively impact patients’ quality of life and adherence to treatment. This study describes the burden of side effects from ARV treatment as experienced by a sample of HIV/AIDS patients and identifies the personal... -
Determinants of age at sexual debut and associated risks among South African youths
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Khangelani Zuma --- , South Africa Thembile Mzolo --- , South Africa Elias Makonko --- , South AfricaThe research uses data from a representative national survey to explore the determinants of age at sexual debut among South African youths in the age group 15–24 years. A random sample of 5 708 youths were interviewed and 92% responded... -
Risk management in HIV/AIDS: ethical and economic issues associated with restricting HAART access only to adherent patients
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Richard Chawana --- , South Africa Donna Knapp van Bogaert --- , South AfricaLike many other developing nations, South Africa faces the challenge of mobilising resources in response to the HIV pandemic. There is a large budget gap between the ideal and the actual amount of funding needed to achieve universal access to... -
Factors associated with HIV infection among sexually experienced adolescents in Africa: a pooled data analysis
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Stella Babalola --- Johns Hopkins Bloomberg School of Public Health, United StatesThe article examines the factors associated with HIV status among adolescents aged 15–19 years in 13 African countries: Côte d'Ivoire, Democratic Republic of Congo, Guinea, Kenya, Liberia, Mali, Malawi, Rwanda, Sierra Leone, Swaziland, Tanzania, Zambia and Zimbabwe. The data were... -
Evaluating adverse drug reactions among HAART patients in a resource-constrained province of South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Viloshini Krishna Manickum --- School of Health Sciences, South Africa Fatima Suleman --- School of Health Sciences, South AfricaThe high prevalence of HIV in KwaZulu-Natal Province, South Africa, has greatly increased the demand for antiretroviral therapy (ART), resulting in an exponential increase in the number of patients initiated on highly active antiretroviral treatment (HAART). However, little information about... -
Cost-effectiveness analysis of infant feeding strategies to prevent mother-to-child transmission of HIV in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Mandy Maredza --- MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, South Africa Melanie Y Bertram --- MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, South Africa Haroon Saloojee --- Division of Community Paediatrics, School of Clinical Medicine, Faculty of Health Sciences, South Africa Matthew F Chersich --- Centre for Health Policy, School of Public Health, Faculty of Health Sciences, South Africa Stephen M Tollman --- MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, South Africa Karen J Hofman --- MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, South AfricaDespite increasing availability of perinatal interventions to prevent mother-to-child transmission (MTCT) of HIV in South Africa, MTCT remains high due to breastfeeding. To inform policy decisions in the country, cost-effectiveness of alternative infant-feeding interventions was conducted. Mathematical modelling was used... -
Effects of human activities on the Waterval River, Vaal River catchment, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TK Gyedu-Ababio F van WykRand Water's chemical water quality data from 1991 to 2000 were used to assess the water quality of the Waterval River, which contributes about 111 x 106m3 of water to the Vaal River annually. Due to a biological community's ability... -
Effects of the 2000 southern Mozambique floods on a marginal coral community: the case at Xai-Xai
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MarcosAM Pereira Paulo MiguelB GonçalvesIn early 2000 the southern part of Mozambique suffered the worst flooding in 50 years, causing fatalities and considerable material loss. This study aimed to investigate the impact of this flood on the coral communities in Xai-Xai lagoon. Benthic cover... -
Gill damage, metallothionein gene expression and metal accumulation in Tilapia sparrmanii from selected field sites at Rustenburg and Potchefstroom, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Daléne van Heerden Peet Jansen van Rensburg Mikko Nikinmaa André VoslooFish were collected from field sites in the mining and agricultural areas of Potchefstroom and Rustenburg, North-West Province, South Africa. Water and sediment samples from each site, together with fish muscle and gills, were analysed by Inductively Coupled Plasma Mass... -
Functionality evaluation of the Xikundu fishway, Luvuvhu River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PSO Fouché --- Zoology Department, South Africa RG Heath --- Golder Associates Africa, South AfricaThe Xikundu fishway, in the Luvuvhu River near Thohoyandou, was monitored for 23 months in 2004–2006. Adults and juveniles of 60% of the expected fish species were collected in the fishway, and two major upstream migrations occurred. Most Labeo and... -
Determining the minimum effective dose of rotenone for eradication of alien smallmouth bass Micropterus dolomieu from a South African river
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MS Jordaan --- CapeNature Scientific Services, South Africa OLF Weyl --- South African Institute for Aquatic Biodiversity, South AfricaIn February 2012 the Rondegat River, in the Cape Floristic Region, was the first river in South Africa where the piscicide rotenone was used to remove an alien invasive fish, smallmouth bass Micropterus dolomieu. In preparation for this treatment, the... -
MICROCRYSTALLINE CELLULOSE POWDERS, PROPERTIES AND POSSIBLE APPLICATIONS IN NUTRITION
Item type: Journal Article • Journal: South African Forestry Journal • Authors: H. Steege B. Phillipp R.E. Nest G. Magister H.J. Lewerenz D. Bleyl Reeves -
Overland Flow on Small Plots at the Jonkershoek Forestry Research Station
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.B. Versfeld --- Department of Environment Affairs,Overland flow was found to be negligible on small plots at Jonkershoek in the Western Cape. Treatments such as the burning or hoeing of fynbos and the thinning of a plantation had no significant effect on this phenomenon and the... -
The Effect of Season on the Root Growth Capacity of One-Year-Old Pinus radiata Seedlings
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D. G.M. Donald --- ,The effect of season on the Root Growth Capacity (RGC) of conditioned Pinus radiata D.D. seedlings was tested for three years. Results indicate that although the species grows actively throughout the year there is still a marked seasonal fluctuation in... -
Temporal changes in kelp forest benthic communities following an invasion by the rock lobster Jasus lalandii
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LK Blamey --- , South Africa GM Branch --- , South Africa KE Reaugh-Flower --- , South AfricaThe rock lobster Jasus lalandii expanded its centre of distribution south-eastwards into an area known as ‘East of Cape Hangklip’ on the south-west coast of South Africa in the early 1990s. Using historical and present data, we analysed differences in... -
Allozyme and mtDNA variation of white seabream Diplodus sargus populations in a transition area between western and eastern Mediterranean basins (Siculo-Tunisian Strait)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Kaouèche --- Unité de Recherche de Biologie, Ecologie et Parasitologie des Organismes Aquatiques, Tunis L Bahri-Sfar --- Unité de Recherche de Biologie, Ecologie et Parasitologie des Organismes Aquatiques, Tunis M González-Wangüemert --- Departamento de Ecología e Hidrología, Facultad de Biología, Spain Á Pérez-Ruzafa --- Departamento de Ecología e Hidrología, Facultad de Biología, Spain OK Ben Hassine --- Unité de Recherche de Biologie, Ecologie et Parasitologie des Organismes Aquatiques, TunisTo investigate the possible influence of the Siculo-Tunisian Strait on the genetic structure of white seabream Diplodus sargus, 13 polymorphic allozyme loci and a fragment of the cytochrome b mito-chondrial DNA were analysed. Allozyme data indicated a moderate but significant... -
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... -
Assessing the ecosystem effects of the abalone Haliotis midae from its diet and foraging behaviour
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Z Zeeman --- Department of Zoology and Marine Research Institute, South Africa GM Branch --- Department of Zoology and Marine Research Institute, South Africa TP Peschak --- Department of Zoology and Marine Research Institute, South Africa D Pillay --- Department of Zoology and Marine Research Institute, South AfricaThe South African abalone Haliotis midae is commercially exploited and seriously threatened by overfishing. This not only affects the species itself but potentially the functioning of the ecosystem because of associated changes in community structure. The nature of effects that... -
Can anchovy age structure be estimated from length distribution data collected during surveys?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C L de Moor --- Marine Resource Assessment and Management Group (MARAM), Department of Mathematics and Applied Mathematics, South Africa D S Butterworth --- Marine Resource Assessment and Management Group (MARAM), Department of Mathematics and Applied Mathematics, South Africa J C Coetzee --- Branch Fisheries Management, Department of Agriculture, South AfricaHistorically, a time-series of proportions-at-age 1 from annual November hydro-acoustic surveys has been used to inform the assessment of, and in particular the choice of appropriate values for juvenile and adult natural mortality for, the South African anchovy Engraulis encrasicolus... -
Pelagic fish species assemblages in the southern Benguela
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GG Louw --- Branch: Fisheries Management, Department of Agriculture, South Africa P Fréon --- CRHMT [Tropical Fish and Mediterranean Research Center], France G Huse --- Institute of Marine Research, Norway MR Lipiński --- Department of Ichthyology and Fisheries Science, South Africa JC Coetzee --- Branch: Fisheries Management, Department of Agriculture, South AfricaPatterns in the co-occurrence of small pelagic fish species within single shoals were investigated using data from 6 814 throws of commercial purse-seiners in South Africa. Assuming that the throw composition reflected the true composition of the assemblage, it was... -
Occurrence of larval fishes in a rocky shore-associated nursery area in temperate South Africa, with emphasis on temperature-related growth in dominant Sparidae
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NA Strydom --- Nelson Mandela Metropolitan University, South Africa AJ Booth --- Department of Ichthyology and Fisheries Science, South Africa A McLachlan --- Nelson Mandela Metropolitan University, South AfricaLarval fishes were studied in Shark Bay on the warm, temperate south-east coast of South Africa. The bay is a small, shallow, subtidal area associated with a rocky shore. Sampling took place fortnightly for a period of one year (September... -
Stand basal area model for Cunninghamia lanceolata (Lamb.) Hook. plantations based on a multilevel nonlinear mixed-effect model across south-eastern China
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: LiFang Zhao --- Center for Earth Observation and Digital Earth, China ChunMing Li --- Institute of Forest Resource Information Techniques, ChinaBased on a multilevel nonlinear mixed-effect model approach, a stand basal area model was developed for Cunninghamia lanceolata (Lamb.) Hook. plantations belonging to the National Forest Inventory in China. The database consists of 583 plots embracing 18 different blocks within... -
Generic linear mixed-effects individual-tree biomass models for Pinus massoniana in southern China
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Liyong Fu --- Research Institute of Forest Resource Information Techniques, China Weisheng Zeng --- Academy of Forest Inventory and Planning, State Forestry Administration, China Huiru Zhang --- Research Institute of Forest Resource Information Techniques, China Guangxing Wang --- Research Center of Forestry Remote Sensing and Information Engineering, China Yuancai Lei --- Research Institute of Forest Resource Information Techniques, China Shouzheng Tang --- Research Institute of Forest Resource Information Techniques, ChinaQuantification of forest biomass is important for practical forestry and for scientific purposes. It is fundamental to develop generic individual-tree biomass models suitable for large-scale forest biomass estimation. However, compatibility of forest biomass estimates at different scales may become a... -
Use and neglect of best-practice HIV/AIDS programme guides by South African companies
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ronald Whelan David Dickinson Tessa MurrayNumerous guidelines set out best-practice policies for HIV/AIDS interventions in the workplace. This study analysed 14 recognised codes and guidelines to gain an understanding of the theoretical consensus regarding the key components of best-practice workplace HIV/AIDS interventions. Nine key components... -
Anaemia in the freshwater catfish Clarias albopunctatus (Teleostei: Clariidae) exposed to brewery wastewater effluent
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NS OluahHaematological changes were studied in freshwater catfish Clarias albopunctatus exposed for 20 days to 25%, 50% and 100% concentrations of brewery wastewater prepared by dilution using tap water. Haemoglobin, haematocrit and erythrocyte counts in fish exposed to wastewater were significantly... -
Impact of flipper-banding on breeding success of African penguins Spheniscus demersus at Robben Island: comparisons among silicone rubber bands, stainless-steel bands and no bands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PJ Barham LG Underhill RJM Crawford TM Leshoro DA BoltonFrom 2001 to 2006, two new designs of flipper bands made from silicone rubbers were tested on African penguins Spheniscus demersus at 365 nests on Robben Island, South Africa. We compared, over six years, the breeding success, from hatching to... -
Effects of fishing on a temperate reef community in South Africa 1: ichthyofauna
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Götz --- , South Africa SE Kerwath --- Department of Environmental Affairs, South Africa CG Attwood --- Marine Research Institute, Department of Zoology, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South AfricaExploitation of temperate reef fish not only affects the target species but potentially changes the composition of reef fish assemblages. This study investigated the effect of fishing on the ichthyofaunal community at protected and exploited sites around the Goukamma Marine... -
Effects of fishing on a temperate reef community in South Africa 2: benthic invertebrates and algae
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Götz --- , South Africa SE Kerwath --- Department of Environmental Affairs, South Africa CG Attwood --- Marine Research Institute, Department of Zoology, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South AfricaThe effect of fishing on benthic reef communities was studied by comparing reefs within and outside the Goukamma Marine Protected Area (MPA) on the South African warm-temperate south coast. Although study sites were similar in terms of bathymetry and oceanographic... -
Tree taper models for Cupressus lusitanica plantations in Ethiopia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Leakemariam Berhe Göran ArnoldssonTo provide a taper model for planning and management of Cupressus lusitanica plantations in Ethiopia, seven taper models were compared. Four performance indicator statistics were used for comparing the models in their ability to estimate tree diameter, and total and... -
Genotype × environment interactions and yield stability of stress-tolerant open-pollinated maize varieties in the Eastern Cape province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vimbayi GP Chimonyo --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Charles S Mutengwa --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Cornelius Chiduza --- Department of Agronomy, Faculty of Science and Agriculture, South AfricaGenotype × environment interactions are inherent in multilocational trials and complicate identification of superior genotypes. The aim of the study was to determine yield performance and stability of 13 maize genotypes in five locations of the Eastern Cape province, South... -
Setting glycaemic targets in patients with type 2 diabetes. Where to now?
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: LA Distiller --- Centre for Diabetes and Endocrinology, South Africa -
Morphine sparing effect of low dose ketamine during patient controlled analgesia
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: FJ Smith --- Department of Anaesthesiology, CGJ Briel --- Department of Anaesthesiology, PJ Becker --- Unit for Biostatistics, South AfricaObjective: To compare the quality of intravenous patient controlled analgesia (PCIA) of low dose morphine plus ketamine with morphine. Design: Double blind case control study. Setting: Academic hospital. Patients: Thirty-six patients scheduled for elective abdominal hysterectomy were randomly divided into... -
Neurophysiological foundations of organ electrodermal diagnostics, acupuncture, TENS and other reflexive therapies
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: JZ Szopinski --- Pain Clinic, South Africa T Sierak --- Department of Medical Biophysics, Poland GP Lochner --- Department of Electronic Engineering, South AfricaThe nervous system is the primary computing system of the human body. The sensory nervous system detects any damage done to the body from both outside and inside and sends the information, at the earliest stage of pathology, to the... -
Safety of pain control with morphine: new (and old) aspects of morphine pharmacokinetics and pharmacodynamics
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: JF Coetzee --- Department of Anesthesiology and Critical Care,Background: A 26-year-old, 59 kg female was administered morphine 10 mg during tonsillectomy, and 5 mg in the recovery room. She died 5 hours after the operation. Hypoxic cerebral injury, arising from morphine side-effects, was pronounced the cause of death,... -
Effective teaching through active learning
Item type: Journal Article • Journal: South African Family Practice • Authors: T Gibbs --- Bute Medical School, University of St Andrews, Scotland D Brigden --- Faculty of Health Sciences, UK D Hellenberg --- University of Cape Town,There can be very few practitioners whose daily working life is not involved someway in teaching or learning. Used in its broadest sense, we engage teaching everyday in our advice to patients, and conversely we learn from each of our... -
Medical students' use of caffeine for ‘academic purposes’ and their knowledge of its benefits, side-effects and withdrawal symptoms
Item type: Journal Article • Journal: South African Family Practice • Authors: K-H Lee --- Faculty of Health Sciences, South Africa GP Human --- Faculty of Health Sciences, South Africa JJ Fourie --- Faculty of Health Sciences, South Africa WAN Louw --- Faculty of Health Sciences, South Africa CO Larson --- Department of Basic Medical Sciences, Faculty of Health Sciences, South Africa G Joubert --- Department of Biostatistics, Faculty of Health Sciences, South AfricaBackground: Caffeine is often used for its benefits, which include increased vigilance. It does have side-effects, however, such as palpitations and withdrawal symptoms that include headaches and drowsiness. Tertiary education often requires students to study for extended hours, especially during... -
Common and less common adverse effects of antihypertensives: a general practitioner's perspective
Item type: Journal Article • Journal: South African Family Practice • Authors: Y Trinder --- Division of Nephrology and Hypertension, -
Acute pain management in general practice: steps to effective pain control
Item type: Journal Article • Journal: South African Family Practice • Authors: K Koch [AN0001]Pain is one of the most common complaints that general practitioners encounter in everyday practice. The swift and effective management of pain is a medical mandate, not only to fulfil an ethical obligation to the patient, but also to prevent... -
Adverse effects profile of multidrug-resistant tuberculosis treatment in a South African outpatient clinic
Item type: Journal Article • Journal: South African Family Practice • Authors: TQ Jacobs --- Department of Family Medicine, A Ross --- Department of Family Medicine,Background: Highly active antiretroviral therapy (HAART) and drugs that are used to treat multidrug-resistant tuberculosis have potentially overlapping adverse effects. Few South African studies have documented adverse effects in the multidrug-resistant tuberculosis population. This study examined the adverse effects profile... -
Acute pain management in general practice: steps to effective pain control
Item type: Journal Article • Journal: South African Family Practice • Authors: K Koch [AN0001]Pain is one of the most common complaints that general practitioners encounter in everyday practice. The swift and effective management of pain is a medical mandate, not only to fulfil an ethical obligation to the patient, but also to prevent... -
Closing the prevention of mother-to-child transmission gap in Nigeria: an evaluation of service improvement intervention in Nigeria
Item type: Journal Article • Journal: South African Family Practice • Authors: ON Chabikuli --- Family Health International 360, U Gwarzo --- Family Health International 360, Nigeria A Olufunso --- Family Health International 360, Nigeria D Reidpath --- Jeffrey Cheah School of Medicine and Health Services, Monash University, Malaysia P Allotey --- Jeffrey Cheah School of Medicine and Health Sciences, Monash University, Malaysia M Ibrahim --- Family Health International 360, Nigeria C Hamelmann --- United Nations Development Program,Objectives: The objective was to assess improvement, or lack thereof, in the uptake of prevention of mother-to-child transmission (MTCT) services at selected sites supported sites by the Global HIV/AIDS Initiative Nigeria (GHAIN). -
The ethics of placebos
Item type: Journal Article • Journal: South African Family Practice • Authors: D Knapp van Bogaert --- Centre for Applied Ethics, GA Ogunbanjo --- Department of Family Medicine and Primary Health Care,The word “placebo”, first used during funeral ceremonies in the 14th century, is derived from old Latin and means “I shall please”. At the time, it was practice among Roman Catholics to hire professional mourners to wail vespers for the... -
The promise and limitations of cash transfer programs for HIV prevention
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: John Fieno --- Regional HIV/AIDS Program, US Agency for International Development, South Africa Suzanne Leclerc-Madlala --- Office of HIV/AIDS, US Agency for International Development, USAAs the search for more effective HIV prevention strategies continues, increased attention is being paid to the potential role of cash transfers in prevention programming in sub-Saharan Africa. To date, studies testing the impact of both conditional and unconditional cash... -
The economics, financing and implementation of HIV treatment as prevention: What will it take to get there?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: David Wilson --- The World Bank Group, USA Jessica Taaffe --- The World Bank Group, USA Nicole Fraser-Hurt --- The World Bank Group, USA Marelize Gorgens --- The World Bank Group, USAThe 2013 Lancet Commission Report, Global Health 2035, rightly pointed out that we are at a unique place in history where a “grand convergence” of health initiatives to reduce both infectious diseases, and child and maternal mortality – diseases that... -
Cardiovascular effects and the use of nonsteroidal anti-inflammatory drugs
Item type: Journal Article • Journal: South African Family Practice • Authors: N Schellack --- Department of Pharmacy, Faculty of Health Sciences,Nonsteroidal anti-inflammatory drugs (NSAIDs) include the nonselective and the cyclo-oxygenase-2-specific inhibitors. These agents are used for pain associated with musculoskeletal conditions. The nonselective anti-inflammatory drugs are still widely used, and are also freely available as over-the-counter analgesics. However, they carry... -
Single parenting effects: resource access and coping of children in Swaziland
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: S'lungile K. Thwala --- Educational Foundations Department, Kayi Ntinda --- Educational Foundations Department, Ntombifuthi Mabuza --- Educational Foundations Department,This study investigated single parenting influences on the psychosocial development of children in Swaziland. Participants were a convenience sample of 24 students attending eight urban and rural schools (females = 54%; males =46%; age range 13–21). Data on experiences of single parenthood... -
Experiences of stereotyping among individuals employed in selected South African organisations
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Lizelle Brink --- Faculty of Economic and Management Sciences, South Africa Jan Alewyn Nel --- Faculty of Economic and Management Sciences, South AfricaThis study investigated the effects of stereotypes among individuals working in selected South African organisations. The participants were 336 employees within the following sectors: banking (n = 40), higher education institutions (n = 72), mining (n = 63), municipalities (n = 24), nursing (n = 4), police services (n = 20), schools... -
The effectiveness of the implementation of the Cape Triage Score at the emergency department of the National District Hospital, Bloemfontein
Item type: Journal Article • Journal: South African Family Practice • Authors: SAN Gordon --- Faculty of Health Sciences, Department of Family Medicine, South Africa H Brits --- Faculty of Health Sciences, Department of Family Medicine, South Africa JE Raubenheimer --- Faculty of Health Sciences, Department of Biostatistics, South AfricaBackground: The need for an appropriate South African triage system led to the development of the Cape Triage Score (CTS), a system to prioritise emergency departments’ workloads. This study evaluated the effectiveness of the CTS at the National District Hospital... -
Debiasing the curse of knowledge and audit judgement: Experience reconsidered
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: R Reeve --- Department of Accounting and Finance, Australia H Holmes --- Department of Accounting and Finance, Australia P Li --- Department of Accounting and Finance, Australia C Patel --- Department of Accounting and Finance, AustraliaThis study contributes to the research related to judgment biases in auditing by examining the extent to which relevant audit experience debiases (mitigates) the “curse of knowledge” (outcome knowledge bias} in audit judgements. Auditors, with a wide range of experience,... -
Value and size investment strategies during the global financial crisis: evidence from the South African equity market
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: K. J. Barnard --- Department of Accounting, South Africa M. B. Bunting --- Department of Accounting, South AfricaValue/growth and size investment strategies involve the creation of equity portfolios on the bases, respectively, of intrinsic value relative to market value and market capitalisation. The propositions that a portfolio of high relative intrinsic value shares anomalously outperforms a low... -
On pricing kernels, information and risk
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Diane L. Wilcox --- School of Computational & Applied Mathematics, South Africa Tim J. Gebbie --- School of Computational & Applied Mathematics, South AfricaThis paper compares out-of-sample, ex-ante risk and returns of arbitrage pricing theory (APT) risk-factor based, zero-cost portfolios with characteristic-based, zero-cost portfolios. In particular the Haugen and Baker characteristic-based model framework is used in a comparison with the capital asset pricing... -
Participation schemes in the South African Mining Industry: The impact of managerial accounting, communication and control systems
Item type: Journal Article • Journal: De Ratione • Authors: Jeremy Lord --- Department of Accounting at the University of Natal,The relationships between employees’ job satisfaction and their perceived extent of participation in profits, and budget-setting and other job-related decision-making, were examined in a profitable South African mining company. Using the statistical technique of Moderated Multiple Regression, it was established... -
Reforming taxation of business for rationalisation and inflation-neutrality
Item type: Journal Article • Journal: De Ratione • Authors: Wesley J Gavin --- Professor in the Department of Accounting at Rhodes University,Taxation of business in South Africa needs reforming to avoid inflationary distortions and investment disincentives. Inflation adjusted income has largely been abandoned as a feasible tax base. Taxing both corporate and non-corporate business income at a flat rate on the... -
Efficacy of intrathecal midazolam versus fentanyl for endoscopic urology surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Neerja Bharti --- Department of Anesthesia & Intensive Care, India Yatindra K Batra --- Department of Anesthesia & Intensive Care, India Sunder L Negi --- Department of Anesthesia & Intensive Care, IndiaBackground: This prospective randomized double-blind study was designed to compare the analgesic efficacy and safety of intrathecal midazolam versus fentanyl as an adjunct to bupivacaine for endoscopic urology surgery. -
Health-related factors associated with intimate partner violence in women attending a primary care clinic in south-western Nigeria
Item type: Journal Article • Journal: South African Family Practice • Authors: AA Silva --- Family Medicine Department, Nigeria A Irabor --- Family Medicine Department, Nigeria OO Olowookere --- Family Medicine Department, Nigeria E Owoaje --- Department of Community Medicine, College of Medicine, Nigeria LA Adebusoye --- Family Medicine Department, NigeriaBackground: Intimate partner violence (IPV) relates to poor physical and mental health in women. Women who have experienced it access healthcare facilities more frequently with symptoms that are often unrelated to violence. The objective of the study was to determine... -
Country selection strategies based on value, size and momentum
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Adam Zaremba --- Poznań University of Economics, PolandThis study provides convincing evidence that stock markets with low capitalisation, low valuation ratios and high momentum tend to outperform country markets with high capitalisation, high valuation ratios and low momentum. Based on sorting procedures and cross-sectional tests conducted across... -
Debiasing the curse of knowledge and audit judgement: Experience reconsidered
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: R Reeve --- Department of Accounting and Finance, Australia H Holmes --- Department of Accounting and Finance, Australia P Li --- Department of Accounting and Finance, Australia C Patel --- Department of Accounting and Finance, AustraliaThis study contributes to the research related to judgment biases in auditing by examining the extent to which relevant audit experience debiases (mitigates) the “curse of knowledge” (outcome knowledge bias) in audit judgements. Auditors, with a wide range of experience,... -
Incorporating stable isotopes into a multidisciplinary framework to improve data inference and their conservation and management application
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HM Christiansen --- Great Lakes Institute for Environmental Research, Canada AT Fisk --- Great Lakes Institute for Environmental Research, Canada NE Hussey --- Great Lakes Institute for Environmental Research, CanadaThrough its ability to address complex ecological questions and the possibility of analysing large sample sizes to understand population‑level processes, the use of stable isotope analysis (δ13C and δ15N) has grown rapidly in recent years. Importantly, it is now becoming... -
Acceptability of human papillomavirus vaccination among academics at the University of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Muhammad Ehsanul Hoque --- Graduate School of Business and Leadership, South AfricaBackground: The South African Government has recently implemented the human papillomavirus (HPV) vaccination programme through the school health system. For the vaccination programme to be effective, it is important to investigate the acceptability of the vaccines among university academics. The... -
Agronomic performance of new cream to yellow-orange sweetpotato cultivars in diverse environments across South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sunette M Laurie --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Sidwell S Tjale --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Andre A van den Berg --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Musa M Mtileni --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute (ARC-VOPI), South Africa Maryke T Labuschagne --- Department of Plant Sciences, South AfricaSweetpotato is grown in diverse environments of South Africa by both commercial and subsistence farmers. The aim of the present study was to assess the stability, agronomic performance and palatability of new ARC cultivars bred for the informal market, and... -
Modelling primary branch growth based on a multilevel nonlinear mixed‑effects model: a Pinus koraiensis plantation case study in north‑east China
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Lingbo Dong --- Department of Forest Management, College of Forestry, China Zhaogang Liu --- Department of Forest Management, College of Forestry, China Fengri Li --- Department of Forest Management, College of Forestry, China Lichun Jiang --- Department of Forest Management, College of Forestry, ChinaOn the basis of a multilevel nonlinear mixed‑effects model approach, branch diameter and length growth models were developed for a Pinus koraiensis plantation in north‑east China. The models developed were able to better capture the residual variation successfully by partitioning... -
Living with the late effects of cervical cancer treatment: a descriptive qualitative study at an academic hospital in Gauteng
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: SN Ntinga --- Oncology Nurse Cancer Diseases Hospital, Zambia JE Maree --- Department of Nursing Education, Faculty of Health Sciences,Objective: The late effects of cervical cancer and its treatment are well known. However, qualitative research describing how women experience these effects seems to be unavailable. The purpose of our study was to describe how women experienced the late effects... -
Invasion of Langebaan Lagoon, South Africa, by Mytilus galloprovincialis – effects on natural communities
Item type: Journal Article • Journal: African Zoology • Authors: T.B. Robinson --- Zoology Department and Marine Biology Research Institute, South Africa C.L. Griffiths --- Zoology Department and Marine Biology Research Institute, South AfricaIn 1992 the invasive mussel Mytilus galloprovincialis began establishing beds on the centre sandbanks of Langebaan Lagoon. This global invader had previously been restricted to rocky shores along the South African coastline. In order to investigate the effect of the... -
>Utilization of shallow subtidal bays associated with warm temperate rocky shores by the late-stage larvae of some inshore fish species, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Nadine A. Strydom --- South African Institute for Aquatic Biodiversity, South Africa>This work describes the utilization of shallow, subtidal bays, associated with rocky shores, by the late-stage larvae and early juveniles of some common inshore fishes. Larval and early juvenile fishes were collected in seven small bays (30–50 m wide) between... -
Person-environment fit, job satisfaction and intentions to leave: The moderating effect of leader empowering behaviour
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Kleinjan Redelinghuys --- Department of Industrial Psychology, Optentia Research Focus Area, South Africa Elrie Botha --- Department of Industrial Psychology, Optentia Research Focus Area, South AfricaThis study sought to determine the possible indirect effect of person-environment (PE) fit on intentions to leave via job satisfaction and the moderating effect of leader empowering behaviour on job satisfaction and intentions to leave the work organisation. Participants were... -
Alcohol metabolism and health hazards associated with alcohol abuse in a South African context: a review
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Pt Pisa --- Centre of Excellence for Nutrition, T Loots Du --- Centre of Excellence for Nutrition, C Nienaber --- Centre for Human Metabonomics,The World Health Organization recently stated that alcohol consumption is the fifth leading cause of death worldwide and that intakes are increasing, especially in developing countries. Alcohol-related effects are major threats to global public health. There is growing recognition of... -
Early rheumatoid arthritis: focus on RA in the developing world
Item type: Journal Article • Journal: South African Family Practice • Authors: Mahmood MTM Ally --- Faculty of Health Sciences, Department of Internal Medicine, South Africa Pieter WA Meyer --- Faculty of Health Sciences, Department of Immunology, South Africa Ronald Anderson --- Faculty of Health Sciences, Department of Immunology, South AfricaA review was undertaken of pathogenic mechanisms in early rheumatoid arthritis (RA) and strategies for cost-effective management of RA in the developing world. Pitfalls in early disease are explored and the importance of aggressive measurable disease control is emphasised. -
Endogeneity in CEO power: A survey and experiment
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Frank Li --- Finance, CanadaThe endogeneity problem has always been one, if not the only, obstacle to understanding the true relationship between different aspects of empirical corporate finance. Variables are typically endogenous, instruments are scarce, and causality relations are complicated. As the first attempt... -
Size and value effects in equity hedge funds
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Jung-Min Kim --- College of Business Administration, Republic of KoreaContrary to the findings in mutual funds, both size and value effects appear in equity hedge funds. Small-cap/value funds outperform large-cap/growth funds. Both asset and share liquidity measures show that small-cap/value funds manage less liquid assets and are more likely... -
The role of dexamethasone in peripheral and neuraxial nerve blocks for the management of acute pain
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: KG Gordon --- Department of Anaesthetics, South Africa S Choi --- Department of Anesthesia, Canada RN Rodseth --- Nelson R. Mandela School of Medicine, South AfricaDexamethasone has an emerging role as an additive in regional anaesthesia for the management of acute pain. However, outcomes in terms of improvement and prolongation of analgesia, as well as the methods of administration and potential adverse effects, have yet... -
Effectiveness and efficiency of national systems of innovation: A comparative analysis of Ghana and Kenya
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Frank L. Bartels --- Innov-8 Policy Advisory Services Ltd, Austria Ritin Koria --- Innov-8 Policy Advisory Services Ltd, Austria Liliana Andriano --- Department of Sociology, United KingdomThis paper presents a comparative analysis of the determinants of the effectiveness and efficiency of the Ghana National System of Innovation (GNSI) and the Kenya National System of Innovation (KNSI) for crafting evidence-based policy. Two regression analyses are performed respectively... -
Potential use of wood ash in South African forestry: a review
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Gerhardus P Scheepers --- Department of Forestry and Wood Science, South Africa Ben du Toit --- Department of Forestry and Wood Science, South AfricaThe use of landfills as a disposal method for wood ash is costly, environmentally detrimental and is pitted against increasingly stern environmental regulations. Literature has shown that wood ash has the potential to be used as a forest fertiliser and... -
Livestock grazing has minimal effect on the species richness and diversity of semi-arid shrubland in the Western Little Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Nelmarie Saayman --- Directorate of Plant Sciences, Western Cape Department of Agriculture, South Africa Craig Morris --- Agricultural Research Council–Livestock Business Division, Range and Forage Unit, c/o School of Biological and Conservation Sciences, South Africa Hannes Botha --- Directorate of Plant Sciences, Western Cape Department of Agriculture, South AfricaThe Succulent Karoo, one of two arid biodiversity hotspots in the world, is known for its high plant species richness, but little is known about the influence of topography and how it mediates the potentially deleterious effects of grazing. Changes... -
Merger imbalance and returns in international equity markets
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Adam Zaremba --- Department of Investment and Capital Markets, Poland Przemyslaw Grobelny --- Department of Investment and Capital Markets, PolandAt the global level, the mispricing theory of mergers by Shleifer and Vishny (2003) may imply that a significant number of targets acquired in a given country is a sign of market-wide undervaluation whereas intense acquisition activity indicates overvaluation. The... -
Psychological validation of the Rosenberg Self-Esteem Scale (RSES) in South Africa: Method effects and dimensionality in black African and white university students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Malose Makhubela --- Department of Psychology, Solomon Mashegoane --- Department of Psychology,The study examined the factor structure and cross-cultural validity of the Rosenberg Self-esteem Scale (RSES) in a sample of South African students (N = 862; black African = 67%, female = 71.5%). Alternative a priori CFA models (unidimensional, bi-dimensional and... -
Univariate tests of momentum on the JSE
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Daniel Page --- Finance Division, School of Economic & Business Sciences, South Africa Christo Auret --- Finance Division, School of Economic & Business Sciences, South AfricaThis study intends to test whether medium-term price momentum is present on the cross-section of shares listed on the JSE. Using the methodology of Jegadeesh and Titman (1993; 2001), shares are sorted applying four estimation periods (E = 3, 6,... -
Diversification and the realised volatility of equity portfolios
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Hannes du Plessis --- Department of Finance and Tax, South Africa Paul van Rensburg --- Department of Finance and Tax, South AfricaIn Markowitz’s (1952) portfolio theory, a reduction in volatility for a given level of expected return is implied as being equivalent to an increase in diversification. The recent development of risk-based portfolio construction methods, which emphasise diversification separately from volatility... -
The disposition effect, price performance and fundamentals of IPOs: Evidence from Taiwan
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Chien-Feng Huang --- Department of Computer Science and Information Engineering, Taiwan, ROC Chih-Hsiang Chang --- Department of Finance, Taiwan, ROC Li-Min Kuo --- Department of Computer Science and Information Engineering, Taiwan, ROC Tsung-Nan Hsieh --- Department of Computer Science and Information Engineering, Taiwan, ROCThis study investigates whether the difference of the IPO issuing companies’ fundamentals impacts their price performance after listing and the significance of the disposition effect. Empirical results show that the IPO issuing companies’ fundamentals drive their first-day post-listing returns, one-year... -
Do mutual fund flows drive the disposition behaviour of fund managers?
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Min-Hsien Chiang --- Institute of International Business, Taiwan Hsin-Yi Huang --- Department of Finance, TaiwanThis study examines the relationship between fund flows and the disposition behaviour of fund managers. During our sample period of 1996–2014, we find that the disposition biases of fund managers are significantly and negatively correlated with unexpected fund flows but... -
Fishery benefits from exploiting spawning aggregations not solely dependent on enhanced fish density
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Robinson --- Australian Research Council (ARC) Centre of Excellence for Coral Reef Studies, Australia NAJ Graham --- Australian Research Council (ARC) Centre of Excellence for Coral Reef Studies, Australia A Grüss --- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, USA C Gerry --- Seychelles Fishing Authority, Seychelles J Bijoux --- Seychelles Fishing Authority, SeychellesThe vulnerability of spawning aggregations to exploitation varies among fisheries as a result of differences in the population-density changes associated with this behaviour. However, vulnerability to fishing is also influenced by technology, environmental factors, and fish and fisher behaviours. Focusing... -
Adverse developmental experiences and risky health behaviours among black South African university students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Solomon Mashegoane --- Department of Psychology, South Africa Malose Makhubela --- Department of Psychology, South AfricaThis study examined the relationship between adverse developmental experiences (ADEs) and risky health behaviours among a cross-sectional sample of black South African students (n = 393; females = 58%, Mage = 20.5 years, SD = 2.9). Binary logistic regression was... -
Sample-size determination and adherence in randomised controlled trials published in anaesthetic journals
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: M Nontshe --- Metropolitan Department of Anaesthetics, Critical Care and Pain Management, South Africa S Khan --- Metropolitan Department of Anaesthetics, Critical Care and Pain Management, South Africa T Mandebvu --- Metropolitan Department of Anaesthetics, Critical Care and Pain Management, South Africa B Merrifield --- Metropolitan Department of Anaesthetics, Critical Care and Pain Management, South Africa RN Rodseth --- Metropolitan Department of Anaesthetics, Critical Care and Pain Management, South AfricaBackground: Sample-size calculations are critical to ensure that randomised control trials return robust and reliable results. The estimated treatment effects used in these calculations is often significantly different from the actual treatment effect and can dramatically impact trial validity. -
Correlation and path-coefficient analyses of root yield and related traits among selected sweetpotato genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Fekadu Gurmu --- South Agricultural Research Institute, Ethiopia Hussein A Shimelis --- African Centre for Crop Improvement, South Africa Mark D Laing --- African Centre for Crop Improvement, South AfricaThe objective of this study was to assess associations between yield and yield-related traits, and to identify the most efficient yield-predicting traits in sweetpotato for effective selection. Twenty-five newly developed sweetpotato genotypes were evaluated across six environments using a 5... -
The cost-effectiveness of using latrine dehydrated and pasteurization pellets and struvite: Experimental evidence from South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Benjamin Chapeyama --- School of Agricultural, Earth and Environmental Sciences, South Africa Edilegnaw Wale --- School of Agricultural, Earth and Environmental Sciences, South Africa Alfred Odindo --- School of Agricultural, Earth and Environmental Sciences, South AfricaFaecal sludge and urine can be recycled and processed into usable fertilizer products such as the latrine dehydrated and pasteurization (‘LaDePa’) pellets and struvite, respectively. To quantitatively determine the financial cost effectiveness of using LaDePa and struvite, a study was... -
Genetic variability of the Lessepsian migrant mussel Brachidontes pharaonis (Bivalvia: Mytilidae) in Tunisia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Antit --- UR11ES12 Biologie de la Reproduction et du Développement animal, Faculté des Sciences de Tunis, Tunisia N Amor --- KSU Mammals Research Chair, Department of Zoology, Saudi Arabia J Urra --- Oceanographic Center of Málaga–Spanish Institute of Oceanography, Spain AN Alagaili --- KSU Mammals Research Chair, Department of Zoology, Saudi Arabia S Farjallah --- Unité de Recherche de Biologie Intégrative et Ecologie Évolutive et Fonctionnelle des Milieux aquatiques, Faculté des Sciences Tunis, TunisiaThe present study used two mitochondrial markers (16S rRNA and COI) to assess the genetic diversity of a newly founded Lessepsian migrant mussel, Brachidontes pharaonis, in Tunisian waters. The species appears to be restricted to only one population in Rades... -
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... -
Physico-chemical water quality characteristics of upper Ebonyi River, Enugu State, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NO Nweze --- Department of Plant Science and Biotechnology, Nigeria EC Eze --- Department of Plant Science and Biotechnology, NigeriaThe physico-chemical characteristics of upper Ebonyi River, Nigeria were assessed at four locations, from September 2014 to December 2014, using standard methods, thereby providing information for documentation and the determination of pollution status in comparison with World Health Standards. Parameters,... -
Social support effects on diabetes management by South African emerging adults: A replication and extension study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Elné Visagie --- Compres, School for Psychosocial Health, South Africa Esmé van Rensburg --- Compres, School for Psychosocial Health, South Africa Elmarí Deacon --- Optentia, School for Psychosocial Health, South AfricaThis study aimed to explore and describe the role of social support in successful living with type 1 diabetes. Informants were eight emerging adults with well-controlled type 1 diabetes (females = 5; white = 7, African = 1; mean time since diagnosis = 8.5 years, SD time since... -
Population fluctuations of Cerithidea decollata (Gastropoda: Potamididae) in mangrove habitats of the St Lucia Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JL Raw --- , South Africa GM Rishworth --- , South Africa R Perissinotto --- , South Africa JB Adams --- , South AfricaMangrove macrobenthos species are used as ecological indicators as they are sensitive to changes in sediment properties. In this study, the population density of the common mangrove whelk Cerithidea decollata was assessed during different environmental conditions in the St Lucia... -
Distribution and habitat use of Indo-Pacific bottlenose dolphins Tursiops aduncus along the south coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: OA Vargas-Fonseca --- , South Africa SP Kirkman --- , South Africa D Conry --- , South Africa GM Rishworth --- , South Africa V Cockcroft --- , South Africa PA Pistorius --- , South AfricaThe distribution and habitat use of the Indo-Pacific bottlenose dolphin Tursiops aduncus along the south coast of South Africa was investigated using bi-monthly boat-based surveys, from 2013 to 2016, over a distance of 145 km between the Goukamma and Tsitsikamma... -
The influence of phosphorus and calcium application rates on the mineral composition of the perennial legume Macrotyloma axillare
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Karina Batista --- Instituto de Zootecnia, Brazil Luciana Gerdes --- Instituto de Zootecnia, Brazil Alessandra Aparecida Giacomini --- Instituto de Zootecnia, Brazil Waldssimiler Teixeira de Mattos --- Instituto de Zootecnia, Brazil Ivani Pozar Otsuk --- Instituto de Zootecnia, BrazilThe response of legumes to the supply of either phosphorus (P) or calcium (Ca) alone has been extensively investigated but no prior studies have evaluated their combinations in the perennial legume Macrotyloma axillare (Macrotyloma legume). This study assessed the mineral... -
Restorative effects of awe on negative affect after receiving negative performance feedback
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Cynthia Atamba --- Department of Business Administration, ChinaThe present study investigated the discrete positive effects of awe on negative job affect (NJA) arising from receiving negative performance feedback from a work supervisor or a co-worker. The participants were 131 business professionals and students at a large university... -
Nevirapine in African surface waters induces liver histopathology in Oreochromis mossambicus: A laboratory exposure study
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: UMC Nibamureke --- Department of Zoology, South Africa IEJ Barnhoorn --- Department of Zoology, South Africa GM Wagenaar --- Department of Zoology, South AfricaNevirapine (NVP) is one of the HIV antiretrovirals detected recurrently in African surface waters. Liver side effects in humans were reported. Because the effects on fish are unknown, this study investigated the potential effects of NVP on selected biometric indices... -
Growth and biomass partitioning of nine provenances of Quillaja saponaria seedlings to water stress
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos Magni --- Departamento de Silvicultura, Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Chile Sergio Espinoza --- Centro de Desarrollo para el Secano Interior, Facultad de Ciencias Agrarias y Forestales, Chile Paola Poch --- Departamento de Silvicultura, Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Chile Betsabé Abarca --- Departamento de Silvicultura, Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Chile Iván Grez --- Departamento de Silvicultura, Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Chile Eduardo Martínez --- Departamento de Silvicultura, Facultad de Ciencias Forestales y de la Conservación de la Naturaleza, Chile Marco Yáñez --- Núcleo Científico Multidisciplinario, Chile Rómulo Santelices --- Centro de Desarrollo para el Secano Interior, Facultad de Ciencias Agrarias y Forestales, Chile Antonio Cabrera --- Centro de Desarrollo para el Secano Interior, Facultad de Ciencias Agrarias y Forestales, ChileInformation on the morphological and physiological responses of seedlings to stressors, such as water stress, is required for successful early establishment of seedlings. We examined provenance variation in morphological and physiological traits of Quillaja saponaria Molina seeds from nine provenances... -
Developing a taper model for the Pinus elliottii × P. caribaea var. hondurensis hybrid in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Madeleen Algera --- Planning Department, Komatiland Forest, South Africa Christoph Kätsch --- Postgraduate Forest Programme, South Africa Paxie W Chirwa --- Postgraduate Forest Programme, South AfricaA relatively new hybrid, Pinus elliottii × P. caribaea var. hondurensis (Pexc), for which a taper model does not exist, is being planted commercially in South Africa. This study primarily focused on developing a taper model for Pexc in South... -
Mixed-effect non-linear modelling for diameter estimation along the stem of Tectona grandis in mid-western Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Luciano Rodrigo Lanssanova --- Postgraduate Program of Forestry Sciences, Department of Forest Engineering, Brazil Sebastião do Amaral Machado --- Postgraduate Program of Forestry Engineering, Department of Forest Engineering, Brazil Alexandre Techy de Almeida Garrett --- Postgraduate Program of Forestry Sciences, Department of Forest Engineering, Brazil Izabel Passos Bonete --- Postgraduate Program of Forestry Sciences, Department of Forest Engineering, Brazil Allan Libanio Pelissari --- Postgraduate Program of Forestry Engineering, Department of Forest Engineering, Brazil Afonso Figueiredo Filho --- Postgraduate Program of Forestry Sciences, Department of Forest Engineering, Brazil Franciele Alba da Silva --- Postgraduate Program of Forestry Engineering, Department of Forest Engineering, Brazil Lucas Dalmolin Ciarnoschi --- Postgraduate Program of Forestry Engineering, Department of Forest Engineering, BrazilThis study evaluated the efficiency of taper functions and the application of mixed-effect modelling for diameter estimation along the stems of Tectona grandis. We sampled 266 trees of Tectona grandis, measuring the diameter at relative heights for volume determination, grouping... -
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... -
Management of the Global Fund aid programme in Botswana: challenges and prospects for health services delivery
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Dintle Molosiwa --- Chemonics International Inc., Botswana Tyanai Masiya --- School of Public Management and Administration, South Africa Godfrey Maringira --- School of Humanities, Anthropology, South AfricaThis paper examines the institutional management of the Global Fund to Fight AIDS, Tuberculosis and Malaria (GFATM) in Botswana. We analyse the often contested roles of the state and non-governmental organisations (NGOs) as recipients of GFATM and partners in extending... -
Genetic diversity of endangered sandalwood (Osyris lanceolata) populations in Kenya using ISSR molecular markers
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: KP Andiego --- Department of Forestry and Wood Science, Kenya OG Dangasuk --- Department of Biological Sciences, Kenya DW Odee --- Biotechnology Laboratory, Kenya FS Omondi --- Biotechnology Laboratory, Kenya DF Otieno --- Department of Biological Sciences, Kenya BK Balozi --- Department of Forestry and Wood Science, KenyaOsyris lanceolata is an evergreen, drought tolerant tropical African tree species belonging to the family Santalaceae. It is endangered, owing to overexploitation for its essential oil used in cosmetics and pharmaceutical industries. The study aimed at determining: (1) the genetic... -
Corporate effective tax rates: An exploratory study of South African listed firms
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Cecileen Greeff --- School of Accountancy, Faculty of Economic and Management Sciences, South AfricaThe corporate effective tax rates (ETRs) of South African firms listed on the Johannesburg Stock Exchange (JSE) were examined for the period 2009 to 2017 to determine if there were any changes over this period. The study further investigated the... -
Do challenges still exist amongst HIV/AIDS patients in managing their condition? A cross-sectional study of 297 participants in the Ethekwini Metro of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Panjasaram Naidoo --- Pharmaceutical Sciences, School of Health Sciences, South Africa Rayanta Premdutt --- Pharmaceutical Sciences, School of Health Sciences, South AfricaBackground: South Africa has the largest HIV/AIDS epidemic globally and the largest anti-retroviral treatment (ART) programme in the world, yet HIV incidence is still chronically high in South Africa, especially in KwaZulu-Natal province (KZN). In light of this, a study... -
Genotype-by-environment interaction and yield stability of sunflower hybrids across production environments in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Safiah Ma’ali --- Agricultural Research Council–Grain Crops, South Africa William Makgoga --- Agricultural Research Council–Grain Crops, South Africa Jan Erasmus --- Agricultural Research Council–Grain Crops, South Africa Sophie Swanepoel --- Agricultural Research Council–Grain Crops, South AfricaGenotype-by-environment interaction (GEI) is typical in multi-environment trials, which complicates the identification of superior genotypes, making selection and recommendation of new sunflower genotypes for different environments challenging and expensive. The objectives of this study were to investigate the GEI, identify... -
Maize–Cassava Intercropping: An Effort to Increase Food and Feed Security and Incomes in Coastal Lowland Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: KK Lewa --- Kenya Agricultural and Livestock Research Organisation, Kenya WS Chivatsi --- Kenya Agricultural and Livestock Research Organisation, Kenya HM Saha --- Pwani University, Kenya RW Muinga --- Kenya Agricultural and Livestock Research Organisation, KenyaThe study was carried out at the Kenya Agricultural and Livestock Research Organisation (KALRO) Centre at Mtwapa to assess the effect of shade on the productivity of a maize–cassava intercropping system and on the contribution of the intercropping system to... -
The state of costing research for HIV interventions in sub-Saharan Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Drew B Cameron --- Health Policy and Management, USA Mohamed Mustafa Diab --- Institute for Health Policy Studies, USA Lauren N Carroll --- Institute for Health Policy Studies, USA Lori A Bollinger --- Avenir Health, USA Willyanne DeCormier Plosky --- Avenir Health, USA Carol Levin --- Department of Global Health, USA Benjamin Herzel --- Institute for Health Policy Studies, USA Elliot Marseille --- Health Strategies International, USA Lily Alexander --- Department of Global Health, USA Sergio Bautista-Arredondo --- Division of Health Economics and Health Systems Innovations, Mexico Carlos Pineda-Antunez --- Division of Health Economics and Health Systems Innovations, Mexico Diego Cerecero-García --- Division of Health Economics and Health Systems Innovations, Mexico Gabriela B Gomez --- London School of Hygiene and Tropical Medicine, United Kingdom William H Dow --- Health Policy and Management, USA James G Kahn --- Institute for Health Policy Studies, USAThe past decade has seen a growing emphasis on the production of high-quality costing data to improve the efficiency and cost-effectiveness of global health interventions. The need for such data is especially important for decision making and priority setting across... -
Can core self-evaluations promote employee strengths use?
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: He Ding --- School of Economics and Management, China Xinqi Lin --- School of Labor and Human Resources, ChinaThis study attempted to explore the impact of core self-evaluations (CSE) on employee strengths use, as well as the moderating effect of perceived organisational support for strengths use (POS for strengths use) on the relationship. We hypothesised and tested a... -
The firm’s asset volatility, effective tax rate and leverage effect: Evidence from Taiwan
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: An-Sing Chen --- Department of Finance, Taiwan Pham Tuan Anh --- National Chung Cheng University, Taiwan and Nguyen Tat Thanh University, VietnamThis paper examines firms’ asset volatility across a broad cross-section of publicly traded Taiwanese listed nonfinancial firms and its relationship with effective tax rate and equity volatility under the capital structure framework. By analysing the leverage effect hypothesis of firms... -
Self-esteem and psychological capital: Their mediation of the relationship between Big Five personality traits and creativity in college students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ming Hong --- Institute of Psychology, Belarus Dmitry G. Dyakov --- Institute of Psychology, Belarus Jianhong Zheng --- Department of Psychology, ChinaThis study examined self-esteem and psychological capital as a mediator of the relationship between Big Five personality traits and creativity. A convenience sample of 732 college students from Guangdong, Jiangsu, and Jiangxi provinces participated (females = 71.7%; mean age =... -
Monitoring the effects of spatial protection on the reef fish communities of the Pondoland Marine Protected Area, Eastern Cape Province, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- , South Africa JQ Maggs --- , New Zealand SN Porter --- , South Africa WN Dalton --- , South AfricaMonitoring marine protected areas (MPAs) is critical for evaluating their effectiveness and for improving management. In this study, a single-camera baited remote underwater video system (mono-BRUVS) was deployed quarterly at four sites (10–30-m depths) to quantify the reef fish communities... -
Biomarker responses in African sharptooth catfish, Clarias gariepinus (Burchell, 1822), as indicators of potential metal and organic pollution along the Vaal River system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LJ Connell --- , South Africa GR Jansen van Rensburg --- , South Africa A Avenant-Oldewage --- , South Africa R Greenfield --- , South AfricaThe Vaal River is of considerable economic and environmental importance. It flows through five provinces within South Africa and it is subject to numerous recreational and industrial activities, which often prove detrimental to the health of the system. To determine... -
Experiences of grandmothers caring for female adolescents living with HIV in rural Manzini, Eswatini: a caregiver stress model perspective
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Bonisile S Nsibandze --- , South Africa Charlene Downing --- , South Africa Marie Poggenpoel --- , South Africa Chris PH Myburgh --- , South AfricaThe HIV pandemic has immense effects on the Eswatini population. The burden of caregiving rests on women, typically grandmothers who are elderly and dealing with chronic diseases themselves. The purpose of this study was to explore and describe the experiences... -
Trends in chemical pollution and ecological status of Lake Ziway, Ethiopia: a review focussing on nutrients, metals and pesticides
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LB Merga --- , The Netherlands AA Mengistie --- , Ethiopia JH Faber --- , The Netherlands PJ Van den Brink --- , The NetherlandsAquatic ecosystems contribute to human well-being by delivering ecosystem services, but their protection has been given low priority in Africa. Lake Ziway in the Ethiopian Rift Valley basin provides services including irrigation, drinking water and fish food in the region... -
A simplified approach to estimate the sustainable lifestyle level for retirement planning
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Elze-Mari Roux --- , South Africa Johann de Villiers --- , South AfricaIn this article we offer a simplified version of the alternative retirement planning model we originally proposed (De Villiers & Roux, 2019). Our method focuses on determining the sustainable lifestyle level (SLL) that an individual can currently afford while still... -
Risk-based portfolio sensitivity to covariance estimation
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Hannes du Plessis --- , Paul van Rensburg --- ,Risk-based portfolio construction methods focus on optimally extracting information from the covariance matrix of asset returns, as opposed to utilising forecasts of expected returns, in determining the portfolio allocation. This improves their robustness to estimation error in means, but this... -
Small-minus-big predicts betting-against-beta: Implications for international equity allocation and market timing
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Adam Zaremba --- , PolandWe demonstrate a strong relationship between short-term small-firm premium and future low-beta anomaly performance. Rises (declines) in small-firm prices temporarily improve (deteriorate) funding conditions, benefiting (impairing) the short-run returns on the low-beta strategy. To investigate this phenomenon, we examine returns... -
The role of size and number of forest patches in the conservation of bird species in a fragmented landscape
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kwaku Brako Dakwa --- , Ghana Bright Opoku --- , Ghana Judith Toku --- , GhanaWe used presence data to evaluate the role of small patches in bird conservation in the Cape Coast Metropolis of Ghana by surveying 24 forest patches. Cumulative species-area and number curves were plotted by ordering patch size from large to... -
A business case argument for corporate social responsibility disclosure in Nigeria
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Inalegwu Ode-Ichakpa --- , UK Emmanuel Cleeve --- , UK Chibuzo Amadi --- , UK Godswill Osemeke --- , UKFrom the theoretical perspectives of stakeholder, agency and slack resources, and using fixed effects and random effects models, this study investigates the relationship between corporate social responsibility (CSR) and financial performance. The study adopts fixed and random effects panel estimates... -
Level of adherence and associated factors among HIV-positive adolescents on antiretroviral therapy in Cameroon
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Mbuwir Charlotte Bongfen --- , Ghana Kwasi Torpey --- , Ghana John Ganle --- , Ghana Augustine Ankomah --- , GhanaAim: Globally, there were over 250 000 new HIV infections among adolescents in 2017, with a higher proportion of these in sub-Saharan Africa. In Cameroon, UNICEF estimated over 4 200 new HIV infections in adolescents in 2015; by 2016, there... -
Acute effects of single-bout exercise in adults with type 2 diabetes: a systematic review of randomised controlled trials and controlled crossover trials
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Dominic Hicks --- , South Africa Robert C Hickner --- , South Africa Usha Govinden --- , South Africa Takshita Sookan --- , South AfricaBackground: Exercise interventions improve type 2 diabetes (T2D). Published randomised control trials and crossover control trials were systematically examined to establish the differences in the effect of single-bout exercise on glucose control and insulin sensitivity in individuals with type 2... -
Does perceived chess skills mediate the relationship between fluid intelligence and academic performance?
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Qiyang Gao --- , People’s Republic of China Yayi Feng --- , People’s Republic of China Wei Chen --- , People’s Republic of China Xianjie Ping --- , People’s Republic of ChinaWe analysed the association between chess skills and academic performance in primary school students. Additionally, we tested the potential mediating effect of fluid intelligence on this association. The sample consisted of 255 primary school students (48.2% girls), aged between 10... -
Correctional rehabilitation programmes’ effectiveness: A phenomenological study of recidivists in a South African setting
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ofhani P Musekwa --- , South Africa Tshilidzi M Mulaudzi --- , South Africa James F Takalani --- , South Africa Lufuno Makhado --- , South AfricaThis study sought to explore correctional rehabilitation effectiveness in a South African setting. Using a phenomenological approach, we interviewed ten parole recidivists who have been convicted more than twice on their rehabilitation service experiences. Interpretive phenomenological analysis of the data... -
Alone or in company? Cultural orientation, strategic response and COVID-19 outcomes
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Baniyelme D. Zoogah --- , USA Benedicta S. Quao --- , Ghana Vincent H. T. Musah --- , Ghana Patience O. Ahwireng --- , GhanaThe respiratory disease, Coronavirus Disease 2019 (COVID-19), which began in December 2019, and became a pandemic in early 2020, has posed critical challenges not only for nations and businesses but also individuals. As a result, management scholars are examining organizational... -
Potential impact of marine heatwaves on selected phytoplankton adapted to the Gulf of Guinea during stable hydrographic periods
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Acheampong --- , Ghana P Mantey --- , Ghana A Weremfo --- , GhanaReports suggest that the Gulf of Guinea (northeastern tropical Atlantic) frequently experiences marine heatwaves (MHW)—prolonged periods of anomalously warm seawater—of ≥1.5 °C above baseline. We assessed the likely impact of this anomaly on two microalgae, Thalassiosira weissflogii (diatom) and Gymnodinium... -
Daily hassles and depressive symptoms among COVID-19 home quarantined Chinese university students: The moderating effects of negative cognitive styles
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Junyi Wang --- , China Yinglu Zhou --- , USA Jinhong Ding --- , China Jing Xiao --- , ChinaThe current study examined the potential moderating effects of negative cognitive styles on the relationship between daily hassles and depressive symptoms among COVID-19 home quarantined university students. A total of 686 university students ranging in age from 16 to 23... -
Long-term wheat production management effects on soil fertility indicators in the semi-arid eastern Free State, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Palo Francis Loke --- , South Africa Johannes Jacobus Schimper --- , South Africa Elmarie Kotzé --- , South Africa Christiaan Cornelius du Preez --- , South AfricaThis study evaluated temporal effects of wheat production management practices on soil fertility under semi-arid conditions. Treatments applied for 37 years included straw management (unburned and burned), tillage practices (no-tillage, stubble mulch, and mouldboard ploughing) and weed control methods (chemical... -
Resilience to shocks and food insecurity: Determinants, and the impact of smallholder jatropha curcas cultivation in Southern Malawi
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Owen Y. Chamdimba --- , South Africa Gerald F. Ortmann --- , South Africa Edilegnaw Wale --- , South AfricaThis paper studied household resilience to food insecurity, its determinants, and the impact of shocks on welfare in Southern Malawi. The resilience concept is evolving. A crucial issue in scholarly and policy space is how it is measured. This paper... -
Social and economic effects of marine protected areas in South Africa, with recommendations for future assessments
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JB Mann-Lang --- , South Africa GM Branch --- , South Africa BQ Mann --- , South Africa KJ Sink --- , South Africa SP Kirkman --- , South Africa R Adams --- , South AfricaResearch on the socio-economic aspects of marine protected areas (MPAs) in South Africa is reviewed to guide evaluation and integration. After a brief international review, we used declaration notices and management plans to determine the extent to which social and... -
Parenting style effects on the mental health of college students: Their mediation by proactive personality and self-identity
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Ming Hong --- , Belarus Dmitry Grigoryevich Dyakov --- , BelarusWe examined the mediating role of proactive personality and self-identity on the relationship between mental health and parenting style among college students. Participants were 406 Chinese college students (female = 61.80%, mean age = 19.56 years, SD = 1.38 years)... -
Seasonal variation and drivers of zooplankton, macroinvertebrate and littoral fish communities from irrigation ponds in a semi-arid region in the Eastern Cape (South Africa)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mofu --- , South Africa T Dalu --- , South Africa RJ Wasserman --- , South Africa DJ Woodford --- , South Africa D Khosa --- , South Africa OLF Weyl --- , South AfricaIrrigation ponds are increasingly abundant globally, particularly in water-stressed countries with limited natural surface waters, yet knowledge of their ecology is limited. Here, we assessed zooplankton, macroinvertebrate, and littoral fish communities from irrigation ponds located in the Sundays River Valley... -
The relationship between tax transparency and tax avoidance
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Madeleine Stiglingh --- , South Africa Anna-Retha Smit --- , South Africa Anri Smit --- , South AfricaAll over the world, the tax avoidance practices of large multinational firms have received much media attention over the last few years, which has become a prominent reputational risk for many firms. In addition to the possible reputational risk stemming... -
Investigating the impact of country-by-country reporting on effective tax rates: Exploratory evidence from listed South African multinational groups
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Cara Thiart --- , South AfricaBackground: Following the global initiative to curb base erosion and profit shifting, South Africa introduced Country-by-Country (CbC) reporting standards for South African multinational groups with an effective date of 1 January 2016. -
Fire associated exertion myopathy as a mechanism contributing to mortality in Chamaesaura macrolepis (Cope 1862)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: PR Jordaan --- Scientific Technician, JCA Steyl --- University of Pretoria,Following a fire event, an abnormally high number of Chamaesaura macrolepis (Cope 1862) road mortalities were observed on two sections of tar road south of Maputo Special Reserve, Maputo Province, Mozambique. Although most specimens were driven over by vehicles, three... -
Mountain refugia limit anthropogenic suppression in a re-established felid population: the case of the Magaliesberg leopard population in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: R John Power --- , South Africa Matt S Rogan --- , South Africa Vincent N Naude --- , South AfricaAlthough highly adaptable, leopards incur substantial mortality in human-modified landscapes and generally subsist at lower densities than in protected areas. Leopard populations are difficult to enumerate across any landscapes, though there have been strides to improve upon this, particularly in... -
Effects of tropical rainforest fragmentation on bird species: a case study from the Bemanevika Protected Area, northwestern Madagascar
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Armand Benjara --- , Madagascar Lily-Arison Rene de Roland --- , Madagascar Marius Rakotondratsima --- , Madagascar Russell Thorstrom --- , United StatesThe effects of forest fragmentation on forest bird species in the Bemanevika Protected Area (PA), northwestern Madagascar, were investigated during two breeding seasons from October 2016 to January 2018. The forest of Bemanevika is composed of large patches of fragmented... -
Analysis of effectiveness of channels for information gathering and dissemination: Case of fisheries stakeholders in Mwanza and Mara regions of Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sadiki Lameck Kusyama --- , Tanzania Dina Machuve --- , Tanzania Michael Kisangiri --- , Tanzania Abswaid Mfanga --- , TanzaniaThe fisheries sub-sector in Tanzania is challenged with limited use of Information and Communication Technology (ICT) for information gathering and dissemination. Fishers obtain fisheries information from extension officers and their fellow fishers through mainly word of mouth in physical meetings... -
Business organisation performance behaviour indicators in Ghana and Kenya: A comparative analysis
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Solomon Abugre Anafo --- , China Yixiang Tian --- , China Bright Nana Kwame Ahia --- , ChinaWe examined business organisation performance indicators across two African countries (Ghana and Kenya) with diverse and volatile economic variables. Utilising secondary data from 2007 to 2017, we applied fixed-effect panel regression to predict profitability indicators from business operations. Our findings... -
Predicted future changes in ocean temperature and pH do not affect prey selection by the girdled dogwhelk Trochia cingulata
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Martin --- , South Africa S Clusella-Trullas --- , South Africa TB Robinson --- , South AfricaPredator–prey relationships can drive community dynamics in marine systems, but it remains unclear how future changes in seawater temperatures and pH will influence these relationships. This study assessed the effect of predicted future temperatures and pH on the prey choice... -
Social protection intervention and agricultural participation in West Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Romanus Osabohien --- , Nigeria Isaiah Olurinola --- , Nigeria Oluwatoyin Matthew --- , Nigeria Daniel E. Ufua --- , NigeriaThis study contributes towards the achievement of the United Nations (UN) 2030 Sustainable Development Goal (SDG) 1.3 which is to ‘implement appropriate social protection for all to mitigate risk and vulnerability’ by examining how social protection interventions contribute to agricultural... -
Impact of rural, non-farm activities on smallholder farmers’ income-poverty in Eastern zone of Tigray Region, Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yohannes Halefom Gebrtetsadik --- , EthiopiaThis study aims at assessing the impact of rural, non-farm activities on smallholder farmers’ income-poverty. It answers these research questions: Is there any significant difference in the poverty indices between the participants and non-participants of non-farm activities? What is the... -
Estimation of pesticide mixture interaction in Nile tilapia (Oreochromis niloticus) using survival analysis
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: KC Kanu --- , Nigeria NH Amaeze --- , Nigeria AA Otitoloju --- , NigeriaThe acute toxicity of the pesticides atrazine, mancozeb, chlorpyrifos and lambda-cyhalothrin, acting singly and jointly, was assessed on Nile tilapia (Oreochromis niloticus) fingerlings. Median lethal concentration (LC50), median lethal time (LT50), and mixture interaction were estimated, whereas survival analysis was... -
Adoption of dual-purpose sweetpotato varieties under partial population exposure in Rwanda: Insights from an African plant breeding programme
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Gideon Danso-Abbeam --- , South Africa Lloyd J.S. Baiyegunhi --- , South Africa Mark D. Laing --- , South Africa Hussein Shimelis --- , South AfricaAs part of the Green Revolution, plant breeding programmes such as the African Centre for Crop Improvement have trained scientists to breed crop varieties in Africa to address the challenges of low productivity. However, exposure to and adoption of these... -
The Catalan tourism subsystem: applying the methodology of subsystems in the tourism sector
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Albert Vancells --- , Spain Juan Antonio Duro --- , SpainThe analysis of input-output is one of the methodologies most applied in tourism literature to the study of the impacts of tourism activity. In this article, we apply the input-output (IO) subsystems methodology. This methodology is a useful tool for... -
Fear at the top: killer whale predation drives white shark absence at South Africa’s largest aggregation site
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AV Towner --- , South Africa RGA Watson --- , South Africa AA Kock --- , South Africa Y Papastamatiou --- , United States M Sturup --- , South Africa E Gennari --- , South Africa K Baker --- , South Africa T Booth --- , South Africa M Dicken --- , South Africa W Chivell --- , South Africa S Elwen --- , South Africa T Kaschke --- , South Africa D Edwards --- , South Africa MJ Smale --- , South AfricaRisk-induced fear effects exerted by top predators are pervasive in terrestrial and marine systems, with lasting impacts on ecosystem structure and function. The loss of top predators can disrupt ecosystems and trigger trophic cascades, but the introduction of novel apex... -
Variation of the relationships between lengths and weights applied to 123 fish species observed at Réunion Island (Indian Ocean)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Roos --- , Réunion J Taconet --- , Réunion C Gentil --- , Réunion B Brisset --- , Réunion H Evano --- , Réunion Y Aumond --- , Réunion J Huet --- , Réunion C Lepetit --- , Réunion R Boymond-Morales --- , Réunion T Rungassamy --- , Réunion R Elleboode --- , France K Mahé --- , FranceBody length–weight (L–W) relationships of 123 fish species (122 Actinopterygii and 1 Elasmobranchii) were studied from 10 218 individuals caught around Réunion Island from 2000 to 2021. All species, except for 4 with a very small number of individuals and... -
Effectiveness of technology transfer in public research institutions in South Africa: A critical review of national indicators and implications for future measurement
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nazeem Mustapha --- , South Africa Gerard Ralphs --- , South AfricaSouth Africa’s poor economic performance in recent years has prompted calls by policymakers for structural transformation. To break the impasse, a stronger focus on innovation is one strategy the country has articulated through a new White Paper on Science, Technology... -
Lessons and insights from the global productivity slowdown: A research management agenda
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chris William Callaghan --- University of the Witwatersrand, South AfricaAccording to the Solow paradox, the impact of the computer age can be seen everywhere but in the productivity statistics. Despite much debate about productivity gains promised by technologies associated with the ‘fourth industrial revolution,’ these are largely yet to... -
Signalling of internal audit effectiveness
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Jabile Brenda Pooe --- , South Africa Karin Barac --- , South Africa Kato Plant --- , South Africa Blanche Steyn --- , South AfricaThe internal audit function is increasingly recognised as an important internal governance mechanism and consequently factors that contribute to its effectiveness are now an area of great interest to researchers and practitioners. This study draws on signalling theory to fill... -
Product-harm crisis and perceived betrayal: The moderating effect of cognitive bias
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Li Yalin --- Suqian University, China Zhao Min --- Hubei University of Economics, ChinaThis study utilised an experimental design to examine the moderating effect of cognitive biases (availability of information and herd effect) on the relationship between product-harm crisis and perceived betrayal. In a series of three studies involving 596 young adults (college... -
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... -
The role of culture in effective HIV/AIDS communication by theatre in South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Chijioke Uwah --- , , South AfricaThe need to effectively communicate HIV/AIDS messages in South Africa, given the high prevalence of the pandemic, cannot be overemphasised. Communication scholars have long emphasised the need to recognise adherence to cultural norms of target communities as catalyst for effective... -
Edge effect from paths on two chameleon species in Madagascar
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jessica Metcalf --- Imperial College, UK Nick Bayly --- The Wetland Trust, Michel Bisoa --- Faculté des Sciences, Madagascar Jeanneney Rabearivony --- Faculté des Sciences, Madagascar Alex Stewart‐Jones --- School of Biological Sciences, U.K.Edge effects are thought to be widespread in ecology and have important implications for forest fragmentation and conservation. Generally, however, large openings in the forest canopy are considered. Here we report a statistically robust edge effect from forest paths with... -
Customary ecological conservation of Mwanda-Marungu Pastoral Commons in Taita Hills, south-west Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Daniel Maghanjo Mwamidi --- Institute of Environmental Sciences and Technology (ICTA), Autonomous University of Barcelona, Spain Abdirizak Arale Nunow --- Moi University, Kenya Pablo Dominguez --- Institute of Environmental Sciences and Technology (ICTA), Autonomous University of Barcelona, SpainRural commons in East-Africa have historically played key socio-economic and environmental sustainability. Despite growing interest in this arena, there are still surprisingly few studies that examine rural customary management of pastoral communities in East Africa. This is striking given that... -
The classroom environment and college students’ being silent/hidden dropouts: The chain of mediating effects of college identification and academic achievement
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Yongtao Gan --- Shantou University, China Tian Zhang --- Shantou University, China Jian Gao --- Shantou University, China Yifei Li --- Universiti Malaya, College of Education, Malaysia Jing Zhang --- Shantou University, China Wenjun Wang --- Cleveland State University, USAThe present study investigated the relationship between the classroom environment (CE) and hidden dropout (HD), and the chain mediating role of college identification (CI) and academic achievement (AA) in that relationship. A total of 1 214 Chinese college students were... -
Purpose in life and academic performance: Grit mediation among Chinese college students
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Yungui Guo --- Hunan University of Science and Technology, China Shiyu Luo --- Hunan University of Science and Technology, China Yu Tan --- Hunan University of Science and Technology, ChinaThis study explored the mediating effect of grit (consistency of interest, perseverance of effort) on the association between purpose in life (meaningfulness, goal orientation, and beyond-the-self) and academic performance. Data were collected from 493 students from two universities in Hunan... -
Is the use of commercial organic ameliorants for cropping justified?
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T C Baloyi --- ARC-Grain Crops, South Africa F R Kutu --- ARC-Grain Crops, South Africa C C du Preez --- University of the Free State, South AfricaLarge areas of soils in sub-Saharan Africa are poor in organic matter and nitrogen-phosphorus-potassium (NPK) fertilisation is essential for cropping. Most farmers are smallholders who cannot afford NPK fertilisers but they could consider alternatives like commercial organic ameliorants.This applies also... -
Plantation water productivity (PWPWOOD) and not water-use efficiency (WUE) as the measure of commercial plantation yield improvement: a review
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Nkosinathi D Kaptein --- University of KwaZulu-Natal, South Africa Alistair D Clulow --- University of KwaZulu-Natal, South Africa Michele Toucher --- University of KwaZulu-Natal, South Africa Colin S Everson --- University of KwaZulu-Natal, South Africa Steven B Dovey --- Shaw Research Institute, South Africa Ilaria Germishuizen --- Institute for Commercial Forestry Research, South AfricaGlobal demand for forest products is ever-increasing, creating competition for water between downstream water users and commercial forest producers. Tree production should therefore aim at the effective use of water by producing maximum tree biomass from water used with the... -
Pandemic impact on the co-movement and hedging effectiveness of the global futures markets
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Ahmad Danial Zainudin --- CIMB Investment Bank Malaysia, Malaysia Azhar Mohamad --- International Islamic University Malaysia, MalaysiaThis paper examines the impact of COVID-19 on five of the world's most liquid futures markets. The results of our wavelet coherence analysis for spot futures reveal two important findings. First, spot futures coherence movements during the pandemic period are... -
Work engagement and job-related well-being: The moderation by public service work motivation
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Zhi Li --- Chongqing University, China Ni Chen --- Chongqing University, ChinaThis study examined the relationship between civil servants’ work engagement and job-related well-being, and how it is moderated by work motivation. Participant were 496 Chinese civil servants (female = 41.7%; mean age = 40.5 years, SD = 14.14 years, 93.3%... -
Forage yield and quality response of Napier grass (Cenchrus purpureus) to different dry season harvesting management under the subhumid agroecology of western Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Abuye Tulu --- Oromia Agricultural Research Institute, Ethiopia Mekonnen Diribsa --- Oromia Agricultural Research Institute, Ethiopia Worku Temesgen --- Oromia Agricultural Research Institute, EthiopiaA 3 × 2 factorial study was conducted in 2015, 2016 and 2017, to assess the impact of dry season cutting management on fodder yield and quality of Napier grass. Three harvesting times (November, January and March) and two stubble-... -
Self-esteem mediation of perceived social support and depression in university first-year students: A longitudinal study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Pei Jiang --- Hunan Normal University, China Zhihui Zhang --- Hunan Institute of Engineering, ChinaThis study aimed to explore the development of and change in perceived social support, self-esteem, and depression in college first-year students, as well as the relationships among them. A total of 509 Chinese college first-year students (females = 65.6%, mean... -
Lax comma categories of ordered sets
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Maria Manuel Clementino --- University of Coimbra, Portugal Fernando Lucatelli Nunes --- Universiteit Utrecht, NederlandLet Ord be the category of (pre)ordered sets. Unlike Ord/X , whose behaviour is well-known, not much can be found in the literature about the lax comma 2-category Ord//X . In this paper we show that the forgetful functor Ord//X... -
Social support and self-concept clarity as mediators between college students’ passive social network site use and loneliness
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: --- Shaoxing University, China --- Shaoxing University, China --- Shaoxing University, ChinaThe current study tested the mediating roles of social support and self-concept clarity in the relationship between passive social network site use and loneliness. A total of 709 undergraduate students (females = 44.15%, mean age = 19.10, SD = 0.95)... -
Perceived effects of COVID-19 on smallholder farmers’ agricultural production practices in Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Asrat Mulat Asegie --- Wollo University, Ethiopia Samuel Tadesse Adisalem --- Wollo University, Ethiopia Amogne Asfaw Eshetu --- Wollo University, EthiopiaThis study analyzed the perceived effects of COVID-19 on smallholder farmers’ agricultural production practices in the South Wollo and Oromo Administrative Zones of Ethiopia. Data were collected from 270 randomly selected respondents from September 5 to October 10, 2020. Data... -
Perceived teacher support and student engagement: The chain mediating effect of basic psychological needs satisfaction and learning drive
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Xiuni Xu --- Long Dong University, China Zhen Wu --- Tianjin University of Technology and Education, China Dongpo Wei --- Shandong Huayu University of Technology, ChinaThis study explored the relationship between perceived teacher support and student engagement, and the influence of the basic psychological needs satisfaction and learning drive in this relationship. We sampled 1 136 Chinese higher vocational students, and 1 031 students’ questionnaires... -
Genetic consequences in the southern African endemic seabream Polysteganus undulosus (Sparidae) after eight decades of overfishing
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CJ Oosthuizen --- University of Pretoria, South Africa BQ Mann --- Oceanographic Research Institute (ORI), South Africa P Bloomer --- University of Pretoria, South Africa TB Hoareau --- University of Pretoria, South AfricaThe Critically Endangered seventy-four seabream Polysteganus undulosus, a slow-growing sparid that forms spawning aggregations off South Africa, faced heavy exploitation from 1910 until a fishery moratorium was put in place in 1998. Utilising temporal samples from 1962/1963 (mid-collapse) and 2005/2006... -
The interconnectedness and spillover effects among economic uncertainty, energy-related risks and sovereign risk in BRICS economies
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Pascal Xavier Gnagne --- School of Economics, University of Johannesburg, South Africa Beatrice D. Simo-Kengne --- School of Economics, University of Johannesburg, South Africa Mathias Mandla Manguzvane --- School of Economics, University of Johannesburg, South AfricaEmerging economies experiencing energy-intensive growth face increased energy price volatility, which could fuel macroeconomic instability with possible implications on their debt repayment capacity. This study implements a quantile vector autoregressive model on a dataset collected between April 2011 and July... -
Long-term interannual temperature variability across the KwaZulu-Natal Bight as a technique for monitoring the complex uThukela Marine Protected Area, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Ramsarup --- University of Cape Town, South Africa T Morris --- , South Africa J Hermes --- University of Cape Town, South Africa M Dicken --- Institution for Coastal and Marine Research, Ocean Sciences Campus, Nelson Mandela University, South AfricaThe uThukela Marine Protected Area (MPA), situated on the continental shelf of the KwaZulu-Natal (KZN) Bight on the northeastern coast of South Africa, has been identified as a vital ecological region. Knowledge of the oceanographic dynamics in the region is... -
Determinants of the effective tax rate: Board composition of South African firms listed on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Cecileen Greeff --- School of Accountancy, Stellenbosch University, South AfricaMotivation: Numerous international studies have been conducted to determine the effect of board composition on tax aggressiveness, and ultimately the effective tax rate (ETR) of firms, but to the best of the author's knowledge, no similar research from a South... -
Research on the influence of fiscal policy uncertainty on corporate strategic investment – Evidence from China
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Xuejiao Yu --- Central University of Finance and Economics, China Xiaomin Cao --- Central University of Finance and Economics, China Junjian Gu --- Wuhan University of Technology, ChinaCorporations should pay attention to various policies issued by The Chinese government when making strategic investment. This paper discusses the influence of fiscal policy uncertainty on corporate strategic investment and its mechanism. The results show that the uncertainty of fiscal... -
The effectiveness of feedback channels in hotels in Malawi: perspectives of guests
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Dalitso Kalipalire --- Malawi University of Business and Applied Sciences, Malawi Chun Liu --- Beijing International Studies University, ChinaThis study investigates the perceptions of hotel guests of the effectiveness of feedback channels available in hotels in Malawi. The study found that suggestion boxes are the most common feedback channel in hotels. The telephone is the most preferred channel... -
Momentum trading: How it differs among investor segments
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Baki Cem Şahin --- Central Bank of Türkiye, TürkiyeThis study explores the momentum trading behaviours across different investor segments in the Turkish stock market. The empirical analysis confirms the positive return of the momentum strategy both in absolute terms and relative to the market benchmark, and the results... -
Does parental education moderate the association between personal growth initiative, purpose in life and subjective well-being among Chinese college students?
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Xiaoxia Huang --- Huzhou Vocational and Technical College, China Hong Li --- Zhoukou Vocational and Technical College, China Yungui Guo --- Hunan University of Science and Technology, ChinaWe investigated the moderating effect of parental education on the relationship between personal growth initiative, purpose in life, and subjective well-being. Two-wave time-lagged data with an interval of three months were collected from 491 students (mean age = 19.58 years,... -
Linking exploitative leadership and employees’ work–family conflict: The roles of employees’ power distance orientation and emotional exhaustion
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Lingnan Kong --- School of Economics and Management, North China Electric Power University, China He Ding --- School of Economics and Management, North China Electric Power University, China Shunkun Yu --- School of Economics and Management, North China Electric Power University, China Lining Wu --- Institute of Science and Technology, North China Electric Power University, ChinaWe explored the relationship between exploitative leadership on employees’ work–family conflict, as well as the mediating role of employees’ emotional exhaustion and the moderating role of employees’ power distance orientation in that relationship. Chinese employees (n = 325) working mainly... -
Historical trajectories and current perspectives on sub-Saharan wildland fire science and management in select scientific literature
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Devan Allen McGranahan --- Livestock and Range Research Laboratory, USDA Agricultural Research Service, USA Kevin P Kirkman --- Grassland Science, University of KwaZulu-Natal, South AfricaFire has long been a fixture on African landscapes to which ecosystems, wildlife and people have adapted. Not surprisingly, wildland fire science in Africa has also undergone substantial change and development. Three broad eras of wildland fire science and management... -
Stability and performance of Bambara groundnut (Vigna subterranea (L.) Verdc.) genotypes in different South African environments
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sithembile Kunene --- University of KwaZulu-Natal, Pietermaritzburg campus, College of Agriculture, Engineering and Science, School of Agricultural Earth, and Environmental Sciences, South Africa Abe Shegro Gerrano --- Agricultural Research Council, Vegetable, Industrial and Medicinal Plants, South Africa Alfred Oduor Odindo --- University of KwaZulu-Natal, Pietermaritzburg campus, College of Agriculture, Engineering and Science, School of Agricultural Earth, and Environmental Sciences, South AfricaGlobal food security faces challenges arising from population growth, climate change, and the prevalence of monoculture agriculture. In addressing these concerns, Bambara groundnut (Vigna subterranean (L.) Verdc.) emerges as a promising crop due to its nutritional richness and resilience in... -
First report of Dactylogyrus fimbriphallus (El Gharbi, Birgi & Lambert, 1994) infecting Luciobarbus biscarensis (Boulenger, 1911) in Oued Tadmit River of Djelfa Governorate (Algeria)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Djouhina Chabira --- University of Biskra, Algeria Badreddine Attir --- University of Biskra, Algeria Nurten Aydoğdu --- Balıkesir University, Türkiye Adel Mammeri --- University of Biskra, AlgeriaThis study aimed to determine the occurrence of dactylogyrid communities in Sahara barbel, Luciobarbus biscarensis (Boulenger, 1911), an endemic species to Algeria, according to season and host factors. A total of 78 samples of L. biscarensis were collected seasonally, over... -
The spillover and leverage effects and trading volume of FinTech Exchange-Traded Funds
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Sabbor Hussain --- Chung Yuan Christian University, Taiwan Jo-Hui Chen --- Department of Finance, Chung Yuan Christian University, TaiwanThis paper explores the spillover and leverage effects, as well as trading volume dynamics, of Financial, Technology, and FinTech Exchange-Traded Funds (ETFs) using ARMA-GARCH and ARMA-EGARCH models. The study indicates that these ETF sectors and the stock market index have... -
Opinion divergence, investor sentiment, and stock liquidity: Evidence from social media
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Gaoshan Wang --- Shandong University of Finance and Economics, China Mingyue Chen --- Shandong University of Finance and Economics, China Xiaomin Wang --- Shandong University of Finance and Economics, China Yilin Dong --- Shandong University of Finance and Economics, China Zhiyi Wang --- Shandong University of Finance and Economics, ChinaThis paper developed a mediating effect model of retail opinion divergence, investor sentiment, and stock liquidity to investigate how investor comments and bullish-bearish-polling activities on social media affect investors’ attitudes and behaviours, thus, the stock market. The paper first used... -
CEO-related announcements, trading activity, and calendar effects
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Katarzyna Byrka-Kita --- University of Szczecin, Poland Mateusz Czerwiński --- University of Szczecin, PolandThis study examines how abnormal trading volumes reflect new information, such as CEO-related announcements. Using hand-collected data on 1,236 CEO reappointments and turnovers from Polish firms listed on the Warsaw Stock Exchange, we show that investor reaction to CEO-related announcements... -
Unintended consequences of market-wide circuit breakers in China
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Xinru Wang --- University of Wollongong, Australia Maria H. Kim --- University of Wollongong, Australia Sandy Suardi --- University of Wollongong, Australia Jing Zhao --- La Trobe University, AustraliaThis study examines the effectiveness of market-wide circuit breakers in China, specifically on January 4 and 7, 2016, focusing on their impact on price discovery, volatility, and trader behaviour. Unlike previous research, it explores the broader implications of market-wide halts,... -
Integrating rainfall data into site-specific modelling to improve forest productivity estimation of eucalypt hybrid species in coastal Zululand, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Morries Chauke --- School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, South Africa Henry Mwambi --- School of Mathematics, Statistics and Computer Science, University of KwaZulu-Natal, South Africa Antonio C Ferraz-Filho --- Federal University of Piauí, BrazilThis study aimed to develop a dynamic dominant height model and explore the effects of rainfall on the growth dynamics of Eucalyptus grandis × Eucalyptus urophylla. This species is grown for wood production in South Africa, and accurately estimating site... -
Mixed-effect modelling of Tectona grandis L.f. yield at stand-level
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Lucas Araujo Moura --- Federal University of Paraná, Brazil Allan Libanio Pelissari --- Federal University of Paraná, Brazil Luan Demarco Fiorentin --- Federal University of Paraná, Brazil Vinicius Costa Cysneiros --- Federal University of Santa Catarina, Brazil Luciano Rodrigo Lanssanova --- Federal Institute of Science, Technology and Education of Mato Grosso, Brazil Sidney Fernando Caldeira --- Federal University of Mato Grosso, BrazilThe prediction of volume from commercial plantations is essential to manage Tectona grandis L.f. stands. However, the assumptions of regression, especially homoscedasticity and residual independence, are often ignored when fitting longitudinal regression models. Thus, this work aimed to build a... -
Effective descent morphisms of ordered families
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Maria Manuel Clementino --- University of Coimbra, CMUC, Portugal Rui Prezado --- University of Coimbra, CMUC, PortugalWe present a characterization of effective descent morphisms in the lax comma category Ord//X when X is a locally complete ordered set, as well as in the antisymmetric setting. -
Dung and carrion beetle diversity in small forest patches versus large continuous forest in the southern Cape, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Graham van Bergen --- Nelson Mandela University, South Africa Anina Coetzee --- Nelson Mandela University, South Africa Jan A Venter --- Nelson Mandela University, South Africa Francois Roets --- Stellenbosch University, South Africa Rudi C Swart --- Nelson Mandela University, South AfricaNaturally fragmented indigenous forests in the southern Cape of South Africa are particularly understudied in terms of beetle diversity. This study therefore aimed to determine whether southern Afrotemperate forest dung and carrion beetle diversity differs between continuous forest and naturally... -
Evaluating the histopathology, condition index and stress-on-stress response of caged brown mussels Perna perna for monitoring marine coastal pollution in Senegal
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Tabane --- Centre Régional de Recherche en Écotoxicologie et Sécurité Environnementale (CERES-Locustox), Unité Biologie, Senegal F Cazier --- Centre Commun de Mesures, Université du Littoral Côte d’Opale, France D Dewaélé --- Centre Commun de Mesures, Université du Littoral Côte d’Opale, France K Hylland --- University of Oslo, Norway CT Ba --- Université Cheikh Anta Diop, Senegal M Fall --- Université Cheikh Anta Diop, SenegalThis study is the first in a coastal West African country to evaluate the histopathology, condition index and stress-on-stress response time of caged brown mussels Perna perna for use in pollution monitoring of coastal ecosystems. Perna perna collected from an... -
Veld condition assessments are unrepresentative at the edges of rotational burn management blocks where grass community composition is atypical
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anne E Goodenough --- School of Education and Science, University of Gloucestershire, UK William S Carpenter --- School of Education and Science, University of Gloucestershire, UK Hannah Toms --- School of Education and Science, University of Gloucestershire, UK Benjamin A Bayliss --- School of Education and Science, University of Gloucestershire, UK Chloe J Cookes --- School of Education and Science, University of Gloucestershire, UK Lena Buerger --- School of Education and Science, University of Gloucestershire, UK Chloe L Cogdell --- School of Education and Science, University of Gloucestershire, UK Sara L Evans --- School of Education and Science, University of Gloucestershire, UK Tom Lancashire --- School of Education and Science, University of Gloucestershire, UK Fern D Kenyon-Hamp --- School of Education and Science, University of Gloucestershire, UK Ruari J MacGregor --- School of Education and Science, University of Gloucestershire, UK Sarah A Morshead --- School of Education and Science, University of Gloucestershire, UK Candace M Pattison --- School of Education and Science, University of Gloucestershire, UK Eli Shrubb --- School of Education and Science, University of Gloucestershire, UK Hannah D Upshall --- School of Education and Science, University of Gloucestershire, UK Charlene R Watts --- School of Education and Science, University of Gloucestershire, UK Lynne MacTavish --- Mankwe Wildlife Reserve, South Africa Melissa Dawson --- Mankwe Wildlife Reserve, South Africa Adam G Hart --- School of Education and Science, University of Gloucestershire, UKFenced reserves provide benefits for wildlife but are vulnerable to overgrazing. Accurate veld condition assessments are essential to inform stocking density, translocation/culling interventions and burn management decisions. Here, for the first time, we test whether atypical changes in the grass... -
Proxy variables to represent the productive capacity in a forest growth and yield model for eucalypt hybrid plantations in north-eastern Bahia, Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Mariana Futia Taquetti --- Universidade Federal de Viçosa, Brazil Carlos Pedro Boechat Soares --- Universidade Federal de Viçosa, Brazil Helio Garcia Leite --- Universidade Federal de Viçosa, Brazil Álvaro Augusto Vieira Soares --- Universidade Federal de Uberlândia, Instituto de Ciências Agrárias, Brazil Gilson Fernandes da Silva --- Universidade Federal do Espírito Santo, BrazilThe present study aimed to evaluate proxy variables to represent the productive capacity of the sites in a forest growth and yield model for plantations of Eucalyptus urophylla × Eucalyptus grandis hybrid, considering them in a linear and a linear... -
Deductibility of input tax on share issue costs in the context of the broad taxation principles
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Wilna Beukes --- Stellenbosch University, South Africa Andrea van der Merwe --- Stellenbosch University, South AfricaPurpose: The purpose of this article is to determine whether input tax on share issue costs incurred should be deductible, in consideration of the broad taxation principles of neutrality, efficiency, flexibility, certainty and simplicity and effectiveness and fairness. -
Contagion from crypto exchange hacks: Wealth effect or portfolio rebalancing?
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Dung Thi Ngoc Pham --- College of Technology and Design, University of Economics Ho Chi Minh City, Vietnam Chune Young Chung --- Ton Duc Thang University, Vietnam Doojin Ryu --- Sungkyunkwan University, KoreaThis study explores the contagion mechanism from the cryptocurrency market to stock markets of 30 countries with the highest Bitcoin trading volumes, focusing on cyberattacks targeting cryptocurrency exchanges. We identify investor-induced contagion through the wealth effect as the primary transmission... -
The genetic control of early growth properties in Pinus patula × Pinus tecunumanii hybrid families
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JP de Villiers --- Sappi Shaw Research Centre, South Africa A Nel --- Sappi Shaw Research Centre, South Africa B du Toit --- University of Stellenbosch, South AfricaThe objective of this study was to determine the genetic control of growth properties in Pinus patula × Pinus tecunumanii hybrid families across seven sites planted in the summer rainfall region of southern Africa. Genetic material included in the analyses... -
Analysis of wave energy distribution in the Gulf of Guinea based on reanalysis data from 1993 to 2019
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Dingong --- College of Marine Living Resource Sciences and Management, Shanghai Ocean University, China F Bonou --- International Chair of Physics, Mathematics and Applications, University of Abomey-Calavi, Benin Z Sohou --- International Chair of Physics, Mathematics and Applications, University of Abomey-Calavi, BeninThis study examined the geographical and seasonal distribution of wave parameters (significant height, period, direction) and wave energy in the Gulf of Guinea using MFWAM (Météo-France WAve Model) reanalysis data from 1993 to 2019. The model was validated utilising satellite,...
