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COUNTING NATURAL POPULATIONS OF MICROCYSTIS AERUGINOSA: A SIMPLE METHOD FOR COLONY DISRUPTION INTO SINGLE CELLS AND ITS EFFECT ON CELL COUNTS OF OTHER SPECIES
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Tamar Zohary --- , Arcangela M. Pais Madeira --- ,A rapid, high-speed blending method for disrupting colonies of the cyanobacterium Microcystis aeruginosa to single cells in preparation for cell counts is described. Cell counts obtained for treated samples of natural populations of M. aeruginosa from Hartbeespoort Dam did not... -
Long-Term Antelope Population Monitoring in Southern Cape Forests
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Armin H.W. Seydack --- Department of Water Affairs and Forestry, Republic of South Africa Johan Huisamen --- Department of Water Affairs and Forestry, Republic of South Africa Rynhard Kok --- Department of Water Affairs and Forestry, Republic of South AfricaThe results of population monitoring of two forest antelope species in the Knysna forests (South Africa), the bushbuck (Tragelaphus scriptus) and blue duiker (Philantomba monticola) are presented. Most monitoring was done by faecal pellet group counting, but some track counts,... -
Factors affecting first-month adherence to antiretroviral therapy amongHIV-positive adults in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Dikokole Maqutu --- School of Statistics and Actuarial Science, South Africa Temesgen Zewotir --- School of Statistics and Actuarial Science, South Africa Delia North --- School of Statistics and Actuarial Science, South Africa Kogieleum Naidoo --- Centre for the AIDS Programme of Research in South Africa (CAPRISA), South Africa Anneke Grobler --- Centre for the AIDS Programme of Research in South Africa (CAPRISA), South AfricaThis study explores the influence of baseline factors on first-month adherence to highly active antiretroviral therapy (HAART) among adults. The study design involved a review of routinely collected patient information in the CAPRISA AIDS Treatment (CAT) programme, at a rural... -
Bacterial levels in the Nyl River system, Limpopo province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Greenfield --- Centre for Aquatic Research, Department of Zoology, South Africa JHJ van Vuren --- Centre for Aquatic Research, Department of Zoology, South Africa V Wepener --- Centre for Aquatic Research, Department of Zoology, South AfricaBecause water quantity and quality are of great importance in the arid Limpopo province, the bacterial content of water in the Nyl River System and its possible origins were assessed at five sites. Quarterly surveys took place between April 2001... -
COUNTING NATURAL POPULATIONS OF MICROCYSTIS AERUGINOSA: A SIMPLE METHOD FOR COLONY DISRUPTION INTO SINGLE CELLS AND ITS EFFECT ON CELL COUNTS OF OTHER SPECIES
Item type: Journal Article • Journal: Southern African Journal of Child and Adolescent Mental Health • Authors: Tamar Zohary --- , ArcangelaM. Pais Madeira --- ,A rapid, high-speed blending method for disrupting colonies of the cyanobacterium Microcystis aeruginosa to single cells in preparation for cell counts is described. Cell counts obtained for treated samples of natural populations of M. aeruginosa from Hartbeespoort Dam did not... -
Towards the declaration of a large marine protected area: a subtidal ichthyofaunal survey of the Pondoland coast in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann L Celliers ST Fennessy S Bailey AD WoodA subtidal marine ichthyofaunal survey was carried out on shallow reefs (1–30m deep) in the Pondoland region between the Mtamvuna River and Port St Johns in the Eastern Cape, South Africa. The purpose of this survey was to provide the... -
Recolonisation of the Robberg Peninsula (Plettenberg Bay, South Africa) by Cape fur seals
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Huisamen --- , South Africa SP Kirkman --- Department of Environmental Affairs, South Africa LH Watson --- , South Africa VG Cockcroft --- Department of Zoology, South Africa PA Pistorius --- Department of Zoology, South AfricaThe Cape fur seal Arctocephalus pusillus pusillus colony at Robberg Peninsula, Plettenberg Bay, on the south-east coast of South Africa, was driven to extinction by indiscriminate harvesting by the late 1800s. Seals only began to recolonise this site in the... -
Comparative morphology of the oropharyngeal cavity of clinid fish (Perciformes: Clinidae), with particular attention to the form, number and distribution of taste buds, and dentition
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: O Gon L Fishelson Y DelareaThe present study compares the form, number and distribution of taste buds (TB) in the oropharyngeal cavity (OC) of 17 species of clinid fish (Perciformes, Blennioidei, Clinidae) from different geographical regions (Australia, Taiwan, South Africa), and includes observations on dentition... -
Teachability of collocations: The role of word frequency counts
Item type: Journal Article • Journal: Southern African Linguistics and Applied Language Studies • Authors: Déogratias Nizonkiza --- School of Languages, Potchefstroom Campus, Kris Van de Poel --- School of Languages, Potchefstroom Campus,This study aims to gain insights into which collocations to teach at which proficiency levels by answering the following questions: (i) Of the Verb+Noun and Adjective+Noun types of collocations, which one is more difficult (and should therefore come at a... -
Fluctuations in bird numbers on sewage treatment ponds in an arid environment, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: W Richard J Dean --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Suzanne J Milton --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Hugh P Forsyth --- , South Africa Dorrien R Tissiman --- , South AfricaRegular twice-monthly counts of birds associated with water at the Prince Albert sewage disposal facility recorded 69 species, of which 16 species (23.5%) were waterbirds (ducks, Red-knobbed Coot Fulica cristata and Little Grebe Tachybaptus ruficollis) and 21 species were shorebirds... -
Shipwreck survivor camps: A neglected terrestrial component of maritime archaeology in South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Elizabeth van Tonder --- Department of Anthropology and Archaeology, South AfricaIn South Africa there has been limited systematic investigation of shipwreck survivor camps as an archaeological phenomenon. In most cases these sites are investigated purely as an adjunct to work on the associated wreck. The aim of this paper is... -
Comparative performance of four survey methods for assessing Lilian’s Lovebird abundance in Liwonde National Park, Malawi
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tiwonge I Mzumara --- School of Life Sciences, South Africa Michael R Perrin --- School of Life Sciences, South Africa Colleen T Downs --- School of Life Sciences, South AfricaMonitoring abundance of threatened species is important for conservation planning. Lilian’s Lovebird Agapornis lilianae is a near-threatened small parrot found in mopane Colophospermum mopane woodland. Its population has not been investigated in any part of its range. We investigated the... -
The relationship between the management of payables and the return to investors
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: T. Moodley --- Gordon Institute of Business Science, South Africa M. Ward [cor1] C. Muller --- Gordon Institute of Business Science, South AfricaEffective working capital management assists a firm in achieving improved liquidity through the management of the components of receivables, inventory, and payables. Previous studies have established that changes in working capital have a strong positive correlation to profitability and that... -
Premiums and discounts of exchanged-traded funds
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Wessel M. Badenhorst [cor1]The objective of this study is to determine whether the spread in underlying exchange-traded fund (ETF) investments is a significant cause of the premium/discount of the ETF. Spreads of underlying investment portfolios are alternatively calculated using weighted bid-ask and bid-close... -
The benefit of guest loyalty programmes
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Fleur La Rose --- Stenden Hotel Management School, The Netherlands Bill Rowson --- Stenden Hotel Management School, The NetherlandsThe aim of this research is to find out what kind of guest loyalty programme Apollo Hotels and Resorts should implement for their individual leisure guests in order to gain more loyal leisure guests. In the literature review of this... -
Trends in shore-based angling effort determined from aerial surveys: a case study from KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- , South Africa JB Mann-Lang --- , South AfricaUnderstanding the spatiotemporal characteristics of effort is a critical component of managing fisheries. Recreational shore-angling is the largest sector of the linefishery and one of the primary recreational activities undertaken along the coast of KwaZulu-Natal (KZN), South Africa. The aim... -
Distribution and abundance of African elephants in Ngorongoro Crater, northern Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: John Kioko --- , Tanzania Alanna Horton --- , United States Margo Libre --- , United States Jennifer Vickers --- , United States Emma Dressel --- , United States Heather Kasey --- , United States Pastory M Ndegeya --- , Tanzania Donatus Gadiye --- , Tanzania Bernard Kissui --- , Tanzania Christian Kiffner --- , TanzaniaWe studied the distribution and abundance of African elephants in Ngorongoro Crater (NC), northern Tanzania to test whether male and female elephants select different habitats and to assess whether elephant abundance was related to monthly precipitation. From 2016 to 2017,... -
Road counts reveal The Gambia’s West Coast region still has the densest population of Hooded Vultures Necrosyrtes monachus in Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mawdo Jallow --- , The Gambia Momodou L Dibba --- , The Gambia Fagimba Camara --- , The Gambia David R Barber --- , United States Keith L Bildstein --- , United States Lindy J Thompson --- , United StatesRoad surveys are a useful tool for comparing vulture population trends. Here we present data from road surveys to count Hooded Vultures Necrosyrtes monachus in The Gambia in 2017 and 2021. In the first nationwide road survey in November 2017... -
Estimates of eligibility for antiretroviral treatment (ART) and projected ART impact on AIDS mortality among South African educators
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Thomas M Rehle --- HSRC's Social Aspects of HIV/AIDS and Health Programme, Olive Shisana --- South African Human Sciences Research Council,The study assessed the proportion of HIV-infected educators that need antiretroviral treatment (ART) according to current criteria, and estimated the impact of ART on AIDS mortality by modelling scenarios with and without access to ART. Specimens for HIV testing were... -
Counting Common Starlings: is Sturnus vulgaris invasive in rural South Africa?
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Adrian JFK Craig --- Rhodes University, South Africa Shelley Edwards --- Rhodes University, South AfricaThe numbers of Common Starlings Sturnus vulgaris and indigenous starling species, as well as a subset of other common birds, were recorded from October 2006 to January 2020 at 72 point-count sites along four routes (two urban and two rural)... -
Hooded Vultures Necrosyrtes monachus are still declining in West Africa: a nearly 50-year assessment study (1969–2019)
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Clément Daboné --- University Centre of Tenkodogo/University Thomas Sankara, Burkina Faso Idrissa Ouédraogo --- University Joseph Ki-Zerbo, Burkina Faso Adama Ouéda --- University Joseph Ki-Zerbo, Burkina Faso Lindy J Thompson --- , South Africa Peter DM Weesie --- University of Groningen, The NetherlandsLarge-scale declines in vulture populations have been recorded in West Africa. One concern is that the current trend in Hooded Vulture Necrosyrtes monachus populations in West Africa is poorly known. To help fill this knowledge gap, we conducted nationwide road... -
A conservation assessment of birds in the Karoo region of South Africa: densities, populations, ranges, and trend estimates
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Alan TK Lee --- University of Cape Town, South Africa Dale R Wright --- RMIT University, AustraliaThe Karoo region of South Africa, which includes the Succulent and Nama Karoo biomes, supports a unique avian fauna, with ten bird species occurring exclusively in this arid-zone region and many others exhibiting a strong preference for this habitat. To... -
The Africa Bird Data packages: African citizen science bird data in R
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Francisco Cervantes --- University of Cape Town, South Africa Alan TK Lee --- University of Cape Town, South Africa Dominic AW Henry --- University of Cape Town, South Africa Michael Brooks --- University of Cape Town, South Africa Vernon Visser --- University of Cape Town, South Africa Ané Cloete --- University of Cape Town, South Africa Nancy Job --- South African National Biodiversity Institute, South Africa Res Altwegg --- University of Cape Town, South AfricaThe African Bird Atlas Project (ABAP) and the Coordinated Waterbird Counts (CWAC) are the main citizen science bird monitoring programmes in southern Africa. ABAP data are collected by volunteers that compile bird lists over a grid of geographic areas known... -
Cape Gannet Morus capensis year-round presence off the southern Cape coast of South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Zanri Strydom --- , South Africa Tiaan Strydom --- , South AfricaThe year-round presence and abundance of Cape Gannets Morus capensis in the greater Wilderness waters (Western Cape, South Africa) were monitored through a land-based observational study, 330 km (straight-line distance) from the nearest breeding colony, Bird Island Algoa Bay. Between... -
Updates on population status of vultures in Nazinga Game Ranch, Burkina Faso
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Clément Daboné --- Animal Biology and Ecology, University Centre of Tenkodogo/Thomas Sankara University, Burkina Faso Idrissa Ouédraogo --- Laboratory of Animal Biology and Ecology, Joseph Ki-Zerbo University, Burkina Faso Idrissa Ouédraogo --- Laboratory of Animal Biology and Ecology, Joseph Ki-Zerbo University, Burkina Faso Adama Ouéda --- Laboratory of Animal Biology and Ecology, Joseph Ki-Zerbo University, Burkina Faso Wendengoudi Guenda --- Laboratory of Animal Biology and Ecology, Joseph Ki-Zerbo University, Burkina Faso Peter DM Weesie --- Integrated Research on Energy, Environment and Society, University of Groningen, The NetherlandsIn the early 2000s, the ornithological community was alerted to the vulture population decline in West Africa. Since then, the situation of vultures in this area has not been updated, specifically in Burkina Faso’s protected areas. To find out more,...
