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Die effek van plantpopulasie op die saadopbrengs van sonneblomkultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.L. Loubser --- , C.L. Grimbeek --- , L. A.S. Robertson --- , Beulah Bronkhorst --- , C. Serfontein --- , J.C. van der Sandt --- ,'n Aantal sonneblombasters is vergelyk by drie plantpopulasies oor twee seisoene te Ermelo, Sandvet en Warmbad. Die doel was om die kompensasievermoë van kultivars te bepaal vir 'n swak stand. Onder laepotensiaal-toestande was die kultivar X plantpopulasie-interaksie nie beduidend nie,... -
South African Journal of Plant and Soil Instructions to Authors
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.S. Hammes --- Department of Plant Production, Republic of South Africa B. Kriel --- Department of Plant Production, Republic of South Africa E.A. Beyers --- Department of Plant Production, Republic of South AfricaSingle maize plants (Zea mays L cv. SNK 2244) were grown in sand culture in polyethylene tubes (300 mm × 110 mm diam.) in a glasshouse. Apparent photosynthetic rate was determined at intervals during the growing period, using a portable... -
Die invloed van plantpopulasie op opbrengs en kwaliteit van katoen (Gossypium hirsutum L.) in die Vaalharts- en Sandvetbesproeiingsgebiede
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.P. de Bruyn --- Landboufakulteit, Republiek van Suid-Afrika J. de Kock --- Departement Landbou en Watervoorsiening, Kleingraansentrum, Republiek van Suid-Afrika J.J. Human --- Landboufakulteit, Republiek van Suid-AfrikaDie invloed van plantdigtheid op die opbrengs en kwaliteit van katoen is vir die Vaalharts- en Sandvetbesproeiingsgebiede ondersoek. Aangesien hoër plantpopulasies hoër eise aan water- en stikstofvoorsiening stel, is hierdie effek by verskillende peile van besproeiing en stikstofbemesting uitgetoets. Individuele... -
Refinement and validation of the PUTU wheat crop growth model 2. Leaf area expansion
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Singels --- Department of Agrometeorology, Republic of South Africa J.M. de Jager --- Department of Agrometeorology, Republic of South AfricaA refined leaf growth submodel was incorporated in an existing wheat crop growth model. The submodel calculated daily green leaf area expansion per plant by taking into account plant population, crop age, interplant competition, temperature and crop water status. After... -
The effect of plant density on the injuriousness of Busseola fusca (Fuller) (Lepidoptera: Noctuidae) in grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. van den Berg --- , Republic of South Africa J. B.J. van Rensburg --- , Republic of South Africa J.H. Giliomee --- Department of Entomology and Nematology, Republic of South AfricaThe influence of five different plant densities on whorl damage, internal damage, tillering and yield of grain sorghum under attack by Busseola fusca was evaluated over two seasons, using artificial infestation of three egg batches (90 eggs) per 5-m row... -
Maize response to plant population and soil water supply: I. Yield of grain and total above-ground biomass
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. van Averbeke --- Department of Agronomy, J.N. Marais --- Department of Agronomy,The effect of the level of water deficit on the yield of grain and total above-ground biomass of maize planted at greatly differing densities was investigated in a strictly controlled field experiment, repeated for four seasons. Differences in water supply... -
Maize response to plant population and soil water supply II. Plant barrenness and harvest index
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. van Averbeke --- Department of Agronomy, Ciskei J.N. Marais --- Department of Agronomy, CiskeiThe effects of level of water deficit and plant population density on plant barrenness and harvest index were investigated in a strictly controlled field experiment, repeated for four seasons. Differences in soil water supply were obtained by the seasonal variation... -
Pentachlorophenol-contaminated soil bioremediation: survival and efficacy of monoculture inoculants and enrichment of indigenous catabolic populations
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. D.K. McBain --- Department of Bioscience and Biotechnology, United Kingdom M.S. Salkinoja-Salonen --- Department of Applied Chemistry and Microbiology, Finland E. Senior --- , South Africa C.A. du Plessis --- Department of Microbiology and Biochemistry, South Africa A. Paterson --- Department of Bioscience and Biotechnology, United Kingdom I.A. Watson-Craik --- Department of Bioscience and Biotechnology, United KingdomSurvival and efficacy of monoculture inoculants of Flavobaderium sp. and Rhodococcus chlorophenolicus to bioremediate PCP-contaminated soil were examined under sterile and non-sterile conditions. Both species effected ≥ 40% catabolism in four weeks although inoculant survival was significantly higher with R... -
Effects of plant population density and cultivar on growth, yield and yield components in groundnut (Arachis hypogaea 1.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. J.P. Tarimo --- Department of Crop Science and Production, Tanzania F.P. Blarney --- Department of Agriculture, AustraliaAn experiment was conducted at the University of Queensland Redland bay Farm (27°37′ S, 153°17′ E) in southeast Queensland, Australia to study response of groundnut cultivars [Improved Virginia Bunch, NC-7, Q18801 (Virginia types), TMV-2, McCubbin and Red Spanish (Spanish types)]... -
The effect of plant population on the quality of sunflower seed for processing
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Nel --- , Republic of South Africa H.L. Loubser --- , Republic of South Africa P.S. Hammes --- Department of Plant Production and Soil Science, Republic of South AfricaAmong other disadvantages, low hullability of sunflower seed results in oil cake with a high fibre and low protein content. Hullability is known to increase with increased seed size. Seed size generally decreases with an increase in plant density. The... -
Growth and yield compensation in sorghum (Sorghum bicolor L. Moench) as a function of planting density and nitrogen fertilizer in semi-arid areas of northeastern Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Wondimu Bayu --- Department of Plant Production and Soil Science, South Africa N. F.G. Rethman --- Department of Plant Production and Soil Science, South Africa P.S. Hammes --- Department of Plant Production and Soil Science, South AfricaAn experiment was conducted at two locations in northeastern (NE) Ethiopia to determine the effect of population density on the growth, yield and nitrogen use efficiency of sorghum (Sorghum bicolor L. Moench) under two levels of nitrogen fertilizer application. Eight... -
The prediction of best line combiners and heterosis in Tanzanian maize breeding lines through the use of Amplified fragment length polymorphism (AFLPs)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B.A. Kiula --- Dakawa Agricultural Research Center, Tanzania A-M. Botha --- Department of Genetics, South Africa N.G. Lyimo --- , TanzaniaAmplified fragment length polymorphism DNA markers have been used to assist plant breeders in the choice of maize parents for commercial hybrid production. However, maize yield in Tanzania is significantly reduced by gray leaf spot (GLS) disease, which is now... -
Effect of plant spacing on growth and yield of lettuce (Lactuca sativa L.) in a soilless production system
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Maboko --- , C.P. Du Plooy --- ,Lettuce production in re-circulating hydroponic systems is done on a limited scale in South Africa with conflicting information on the recommended spacing for optimal yield and quality in such systems. The development and yield of four lettuce (Lactuca sativa L.)... -
Seasonal and varietal effects on tiller population development of sugarcane (Saccharum Officinarum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.M. Zhou --- , M.D. Shoko --- , ZimbabweTillers carry leaves, determine leaf area index and indirectly influence the amount of photosynthetically active radiation (PAR) intercepted by the sugarcane canopy. Tillers develop into stalks, the sink for the products of photosynthesis. The objective of this study was to... -
Recent population trends of African penguins Spheniscus demersus in Namibia
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: J. Kemper J-P. Roux P. A. Bartlett Y. J. Chesselet J. A. C. James R. Jones S. Wepener F. J. MolloyThe African penguin Spheniscus demersus is endemic to southern Africa and is listed overall as "vulnerable". Over the past century, however, the Namibian population has been severely reduced and is currently listed as "critically endangered". Recent trends at Possession, Halifax,... -
The impact of emigration on population estimates of deep-sea red crab Chaceon maritae off Namibia
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: L. Le RouxUnderwater photography and tag-recapture methods have previously been found to be the most accurate means of assessing the size of the population of Chaceon maritae off southern Africa. However, recent population estimates made by the tag-recapture method appear to be... -
Population genetic studies of horse mackerel Trachurus trecae and Trachurus trachurus capensis off Angola
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: M. I. Sardinha G. NævdalGenetic variability of the Kunene horse mackerel Trachurus trecae and the Cape horse mackerel Trachurus trachurus capensis was examined using starch gel electrophoresis of enzymatic proteins on individuals collected along the Angolan coast. Six polymorphic enzyme loci were found in... -
Genetic and morphological variation of the lanternfish Lampanyctodes hectoris (Myctophiformes: Myctophidae) off southern Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: W. K. Florence P. A. Hulley B. A. Stewart M. J. GibbonsGenetic and morphological variation within the southern African population of Lampanyctodes hectoris was analysed. A total of 15 enzymes, encoding 22 isozyme loci, was examined (n = 327); seven were polymorphic. The percentage of polymorphic loci ranged from 13.6 to... -
Aspects of the population biology of Octopus vulgaris in False Bay, South Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: C. D. Smith C. L. GriffithsThe population biology of the octopus Octopus vulgaris was studied from specimens collected by SCUBA in False Bay, South Africa, between 1997 and 1998. In all, 83% of the specimens collected were found in shelter. Small octopuses were more active... -
ON THE STATUS OF CLARIAS GARIEPINUS (BURCHELL) IN LARGE MAN-MADE LAKES IN RHODESIA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B.E. Marshall --- Department of National Parks and Wildlife Management, RhodesiaData from some large man-made lakes in Rhodesia suggest that the populations of Clarias gariepinus have declined in these lakes. The reasons for this are not clear although commercial fishing does not appear to be responsible. -
OBSERVATIONS ON THE THREE ALLOPATRIC POPULATIONS OF THE MALUTI MINNOW,
OREODAIMON QUATHLAMBAE (BARNARD) WITH NOTES ON ITS EVOLUTION, ECOLOGY, SPAWNING, AND CONSERVATIONItem type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: S.R. Gephard --- , LesothoMeristics and pigmentation of specimens of Oreodaimon quathlambae from the three known populations were compared to determine whether the species has experienced divergent evolution. Pigmentation was found to vary substantially but meristics counts did not. A proposal is made-to recognise... -
VIABLE HETEROTROPHIC BACTERIAL POPULATION STRUCTURE OF A TURBID MAN-MADE IMPOUNDMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: D.F. Toerien --- , Republic of South Africa D.N. Sadie --- , Republic of South Africa H. J.J. van Vuuren --- Department of Microbiology, Republic of South Africa R.P. Tracey --- Department of Microbiology, Republic of South AfricaSeventy one heterotrophic bacterial isolates were obtained from Wuras Dam, phenotypically characterized and clustered with the unweighted-pair group method. Three groups were obtained of which the first contained 59 members in several clusters. Overall this group was characterized by a... -
POST-IMPOUNDMENT TRENDS IN THE FISH POPULATIONS OF THE HENDRIK VERWOERD DAM, SOUTH AFRICA
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K. C.D. Hamman --- Department of Nature and Environmental Conservation, South AfricaFish population changes in the Hendrik Verwoerd Dam are presented as sampled with a series of multifilament gill nets from Spring 1971 to Summer 1977. During this period, species such as Barbus halubi (smallmouth yellowfish), B. kimberleyensis (largemouth yellowfish), Labeo... -
POPULATION DYNAMICS AND DEMOGRAPHY OF AN ESTUARINE COPEPOD (PSEUDODIAPTOMUS EESSEI) IN LAKE SIBAYA, A SUBTROPICAL FRESHWATER COASTAL LAKE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: RC Hart --- , South AfricaPopulation size and stage structure of Pseudodiaptomus hessei (Mrázek) was studied over 27 months at a single site in subtropical Lake Sibaya. Population density varied seasonally from about 1 to 4 individuals per litre, but a fairly stable population structure... -
RELATIVE FISH POPULATION DENSITY CHANGES IN THE P.K. LE ROUX DAM DURING THE FIRST THREE YEARS AFTER INUNDATION
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: I.G. Gaigher --- Department of Nature and Environmental Conservation, South Africa K. C.D. Hamman --- Department of Nature and Environmental Conservation, South Africa S.C. Thorne --- Department of Nature and Environmental Conservation, South AfricaBefore inundation in September 1976 Barbus holubi and Labeo capensis were the dominant species each making up 46% of the total catch. Immediately after impoundment the relative density of B. holubi increased to 75% while that of L. capensis dropped... -
PRODUCTION OF THE AFRICAN CATFISH (CLARIAS GARIEPINUS) I. GROWTH, MORTALITY AND YIELD SOUTH OF THE ZAMBEZI
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Douglas Clay --- Marine Fish Division, Department of Fisheries and Oceans, CanadaClarias gariepinus were sampled from eight water bodies in southern Africa between 1973 and 1975. Aging results indicate a similar growth pattern for most areas with a near linear age-length relationship. Between year growth compensation was found to be present... -
EFFECT OF PROGRAMMED CIRCADIAN TEMPERATURE FLUCTUATIONS ON POPULATION DYNAMICS OF BULINUS TROPICUS (KRAUSS) AND LYMNAEA NATALENSIS KRAUSS (GASTROPODA: MOLLUSCA)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K.N. de Kock --- Department of Zoology, South AfricaUntil now all life-table studies on Bulinus tropicus (Krauss) and Lymnaea natalensis Krauss involving temperature as the variable factor have been conducted at constant temperatures. This study evaluates the effect of programmed, circadian temperature fluctuations, ranging from 18 to 28... -
EFFECT OF CONSTANT TEMPERATURE ON POPULATION DYNAMICS OF BULINUS TROPICUS (KRAUSS) AND LYMNAEA NATALENSIS KRAUSS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: K.N. de Kock --- Snail Research Unit of the South African Medical Resesrch Council, South Africa J.A. van Eeden --- Snail Research Unit of the South African Medical Resesrch Council, South AfricaLife-tables were compiled for cohorts of the two freshwater snail species Bulinus tropicus (Krauss) and Lymnaea natalensis Krauss at six different constant temperatures from 17 to 32 °C under identical conditions of crowding, feeding and chemical composition of the water... -
SUITABILITY OF TROPICAL FISH FOODS FOR LABORATORY CULTURE OF FOUR SPECIES OF FRESHWATER SNAILS ACTING AS INTERMEDIATE HOSTS FOR ECONOMICALLY IMPORTANT HELMINTH PARASITES IN SOUTH AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: K.N. de Kock --- Department of Zoology, South Africa P.H. Joubert --- , South AfricaFour different kinds of tropical fish food from Tetra Werke, West Germany, as well as a mixture of two of these, were evaluated as possible nutrients for the laboratory culture and maintenance of four freshwater snail species of economic importance... -
NEW DISTRIBUTION RECORDS FOR CLARIAS THEODORAE WEBER 1897, BARBUS EUTAENIA BOULENGER 1904, BARBUS POLYLEPIS BOULENGER 1907 AND OPSARIDIUM ZAMBEZENSE (PETERS 1852) FROM THE WATERBERG, TRANSVAAL, SOUTH AFRICA.
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: C.J. Kleynhans --- , South Africa A. Hoffman --- , South AfricaNew distribution records for four fish species in the Waterberg mountains of the Transvaal were established during surveys since 1987–92. Clarias theodorae was previously reported from one locality each in the Waterberg and Soutpansberg. The current survey disclosed its presence... -
PRELIMINARY OBSERVATIONS ON THE FISH POPULATIONS OF THE RECENTLY-IMPOUNDED KATSE RESERVOIR, LESOTHO
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: D. Tweddle --- , South Africa M. T.T. Davies --- , , South AfricaKatse is a new 35 km long impoundment on the Malibamatso River, a highland tributary of the Orange River in Lesotho. Two fishing surveys in 1996 yielded Barbus aeneus, Labeo capensis, Oncorhynchus mykiss and the occasional Austroglanis sclateri. Length frequency... -
Effects of previous cultivation on regeneration of Julbernadia globiflora and Brachystegia spiciformis in grazing areas of Mupfurudzi Resettlement Scheme, Zimbabwe
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T Chinuwo --- Faculty of Agriculture, Science and Technology, South Africa E Gandiwa --- , Zimbabwe PH Mugabe --- Institute of Environmental Studies, Zimbabwe IDT Mpofu --- Animal Science Department, Faculty of Agriculture and Natural Resources, Namibia E Timpong-Jones --- College of Agriculture, Agricultural Research Centre, GhanaWe investigated the effects of previous cultivation on regeneration potential under miombo woodlands in a resettlement area, a spatial product of Zimbabwe's land reforms. We predicted that cultivation would affect population structure, regeneration, recruitment and potential grazing capacity of rangelands... -
Transformation of a savanna grassland by drought and grazing
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T.G. O'Connor --- , Republic of South AfricaThe relative effects of drought and heavy grazing on the floristic composition, population size and structure, and basal cover of an African savanna grassland were differentiated by comparing changes over eight years, which included a severe drought year, across a... -
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,... -
Alcohol Use, Problem Drinking and Health Risk Factors Among South African Youths
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- Human Sciences Research Council, South Africa Shandir Ramlagan --- Human Sciences Research Council, South Africa Mpho Satekge --- Human Sciences Research Council, South AfricaThe aim of this study was to assess the prevalence and associated factors of problem drinking among South African youth (18–24 years). A cross-sectional population-based household survey was conducted using a multi-stage stratified cluster sampling approach. The total sample included... -
Constructions of Students as Clients or Partners in Knowledge Creation
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Birgit Schreiber --- University of the Western Cape,This study explored notions of ‘the student’ within the South African higher education context. Qualitative data from interviews with twenty-three executive and senior Student Affairs staff and practitioners were collected from three higher education institution in South Africa. The data... -
AIDS, individual behaviour and the unexplained remaining variation
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Alison Katz --- , SwitzerlandFrom the start of the AIDS pandemic, individual behaviour has been put forward, implicitly or explicitly, as the main explanatory concept for understanding the epidemiology of HIV infection and in particular for the rapid spread and high prevalence in sub-Saharan... -
Catchments as conservation units for riverine biodiversity
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MJ WishartThe geological structure and longitudinal nature of river systems provide a possible barrier to the dispersal of lotic organisms. This has the potential to drive evolutionary processes such as genetic differentiation and subsequent allopatric speciation. In the conservation of lotic... -
Fish as a resource in a rural river catchment in the Northern Province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BCW van der WaalThe rural population in the Mutshindudi River valley, in the north-eastern corner of the Northern Province, accept locally-caught freshwater fish as food (85%), but tinned pilchards are the most commonly eaten fish. Fishing gear was recorded in 70% of the... -
An assessment of the fish population of the lower reaches of the Sanyati River, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: W MhlangaThe fish population of the lower reaches of the Sanyati River was studied using multifilament gillnets and monthly sampling was conducted over 13 consecutive months. A total of 15 fish species belonging to seven families were collected and variations in... -
Population demographics of Palaemon peringueyi (Macpherson 1990) (Decapoda: Palaemonidae) in a small intermittently open Eastern Cape estuary
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW FronemanThe population demographics of the caridean shrimp Palaemon peringueyi was investigated monthly at four sites over a period of one year in the small, intermittently-open Grants River Estuary situated on the south-east coastline of southern Africa. Mean total abundance and... -
The distribution and abundance of the endangered Knysna seahorse Hippocampus capensis (Pisces: Syngnathidae) in South African estuaries
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JacquelineF Lockyear Thomas Hecht Horst Kaiser PeterR TeskeThe occurrence, distribution and abundance of the endangered Knysna seahorse Hippocampus capensis in 10 estuaries on South Africa's warm temperate south coast, were investigated. Seahorses were found only in the Knysna, Swartvlei and Keurbooms estuaries. Sex ratios were even and,... -
A preliminary quantitative assessment of gillnet fishing in subtropical Lake Tzaneen, Northern Province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NN Nicolaai --- Department of Zoology and Biology, South Africa A Jooste --- Department of Zoology and Biology, South AfricaBetween January 1998 and January 1999 a quantitative investigation was done on the fish populations of Lake Tzaneen, Northern Province, South Africa. Two graded series of multi-filament gillnets were set overnight every six weeks capturing 14 species of fish. Of... -
Reproductive strategy of Labeo senegalensis Valenciennes 1842 (Teleostei: Cyprinidae) in the Ouémé basin, Benin
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: E Montchowui --- Behavioural Biology Unit and Laboratory of Fish Demography and Hydroecology, Belgium P Lalèyè --- Laboratory of Hydrobiology and Aquaculture, Benin P Poncin --- Behavioural Biology Unit and Laboratory of Fish Demography and Hydroecology, Belgium J-C Philippart --- Behavioural Biology Unit and Laboratory of Fish Demography and Hydroecology, BelgiumAspects of the reproductive biology and population structure of Labeo senegalensis were investigated in the Ouémé River between April 2005 and March 2006. Reproductive strategy was investigated using gonadosomatic index, ovarian structure and fecundity. Average size-at-first-maturity (L 50) was estimated... -
Phytoplankton responses to changes in macrophyte density in a tropical artificial pond in Zaria, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AM Chia --- Department of Biological Sciences, Nigeria DN Iortsuun --- Department of Biological Sciences, Nigeria BJ Stephen --- Department of Biological Sciences, Nigeria AE Ayobamire --- Department of Biological Sciences, Nigeria Z Ladan --- , NigeriaThe response of phytoplankton population dynamics to changes in densities of Nymphaea lotus L. and Polygonum limbatum Meisn. was studied in an artificial pond in Zaria, Nigeria, from June to November 2007. Antagonistic effects of these macrophytes on Netrium sp.,... -
An experimental study on food and salinity preferences of two Brachionus plicatilis rotifer strains from Iran
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Malekzadeh Viayeh --- Artemia and Aquatic Animals Research Institute, Iran H Mohammadi --- Department of Fisheries, Faculty of Natural Resources, IranEffects of feeding on four algal species (Chlorella vulgaris, Nannochloropsis oculata, Isochrysis galbana and Scenedesmus obliques) at salinities of 5, 15 and 25 on the population growth parameters of two Iranian strains of the widespread rotifer species Brachionus plicatilis were... -
A morphological study on species of African Mormyrus (Teleostei: Mormyridae) and their electric organ discharges
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B Kramer --- Zoological Institute, GermanyFive species of Mormyrus Linné 1758, three from West Africa and one each from East and southern Africa, were compared morphologically, and their electric organ discharges (EODs) recorded in the field. The five species were morphologically well differentiated in terms... -
Response of mangroves to drought and non-tidal conditions in St Lucia Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SCL Hoppe-Speer --- Botany Department, South Africa JB Adams --- Botany Department, South Africa A Rajkaran --- Botany Department, South AfricaThe effect of a prolonged closed-mouth state on the condition of mangrove habitats was studied in May 2010 at St Lucia Estuary, KwaZulu-Natal. The mouth had been closed to the sea since 2002 as a result of artificial mouth closure... -
Estimating population size of Saddle-billed Storks Ephippiorhynchus senegalensis in southern Kruger National Park, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Marcelle van den Hoven --- Endangered Wildlife Trust, South Africa Brian Reilly --- Department of Nature Conservation, South AfricaCounting Saddle-billed Storks in a study area the size of the Kruger National Park, at 2.2 million ha, is difficult because the birds are long-lived, sparse in the landscape and have large home ranges. Aerial surveys conducted to date provide... -
Population estimates of three vulture species in Kruger National Park, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Campbell Murn --- , UK Leigh Combrink --- , South Africa G Scott Ronaldson --- , South Africa Charles Thompson --- , South Africa André Botha --- , South AfricaVultures are globally threatened, yet reliable population data on these birds are few, thus measuring their response to change is difficult. Kruger National Park (KNP) in South Africa is an important stronghold for many avian species, particularly vultures. In this... -
The vulnerable Osprey breeding population of the Al Hoceima National Park, Morocco: present status and threats
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Flavio Monti --- Centre d'Ecologie Fonctionnelle et Evolutive (CNRS UMR5175), France Houssine Nibani --- Association de Gestion Intégrée des Ressources (AGIR), Morocco Jean-Marie Dominici --- Rèserve Naturelle Scandola, Parc Naturel Règional de Corse, France Hamid Rguibi Idrissi --- University Chouaib Doukkali, Faculty of Sciences, Morocco Mathieu Thévenet --- , France Pierre-Christian Beaubrun --- Centre d'Ecologie Fonctionnelle et Evolutive (CNRS UMR5175), France Olivier Duriez --- Centre d'Ecologie Fonctionnelle et Evolutive (CNRS UMR5175), FranceIn the Mediterranean, most areas belonging to the initial distribution range of the Osprey Pandion haliaetus have been lost and local populations have disappeared in recent decades because of persecution. Even though direct management actions have allowed local partial recovery,... -
Observations on the Ecology of Pleurobrachia Pileus (Ctenophora) in the Southern Benguela Ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M. J. Gibbons E. Buecher D. Thibault-BothaThe vertical distribution, abundance and size composition of a population of Pleurobrachia pileus was studied during a six-day drogue study conducted off the west coast of South Africa in February 1995. The population was centred in deep water, possibly because... -
Stock Structure of Snoek Thyrsites Atun in the Benguela: A New Hypothesis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M. H. GriffithsIt has long been accepted that snoek Thyrsites atun in the Benguela system constitute a single stock that undergoes seasonal longshore migration in waters between southern Angola and the west coast of South Africa. Based on a review of past... -
Populations of Surface-nesting Seabirds at Marion Island, 1994/95–2002/03
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford J. Cooper B. M. Dyer M. D. Greyling N. T. W. Klages P. G. Ryan S. L. Petersen L. G. Underhill L. Upfold W. Wilkinson M. S. De Villiers S. Du Plessis M. Du Toit T. M. Leshoro A. B. Makhado M. S. Mason D. Merkle D. Tshingana V. L. Ward P. A. WhittingtonDuring the 1990s and early 2000s, populations of surface-nesting seabirds at Marion Island showed different trends, but for the majority of species numbers decreased. Reduced numbers of gentoo penguins Pygoscelis papua, eastern rockhopper penguins Eudyptes chrysocome filholi, Crozet shags Phalacrocorax... -
Population and Breeding of the Gentoo Penguin Pygoscelis Papua at Marion Island, 1994/95 – 2002/03
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford J. Cooper M. Du Toit M. D. Greyling B. Hanise C. L. Holness D. G. Keith J. L. Nel S. L. Petersen K. Spencer D. Tshingana A. C. WolfaardtThe numbers of gentoo penguins Pygoscelis papua breeding at subantarctic Marion Island fell by 40% from 1994/95 to 2002/03, from 1 352 pairs to 806 pairs. Apart from a slight increase in 1998/99, there was a steady decrease in numbers... -
Population of the Macaroni Penguin Eudyptes Chrysolophus at Marion Island, 1994/95–2002/03, with Information on Breeding and Diet
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford J. Cooper B. M. DyerThere is indication that numbers of macaroni penguins Eudyptes chrysolophus at subantarctic Marion Island have decreased since the early 1980s. Estimates of the population at the island fell from about 405 000 pairs in 1983/84 and 434 000 pairs in... -
Decrease in Numbers of the Eastern Rockhopper Penguin Eudyptes Chrysocome Filholi at Marion Island, 1994/95–2002/03
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford J. Cooper B. M. Dyer M. D. Greyling N. T. W. Klages D. C. Nel J. L. Nel S. L. Petersen A. C. WolfaardtThe number of eastern rockhopper penguins Eudyptes chrysocome filholi breeding at subantarctic Marion Island decreased from about 173 000 pairs in 1994/95 to about 67 000 pairs in 2001/02. During 1994/95 – 2002/03 pairs fledged on average 0.40 chicks per... -
Population Dynamics of the Wandering Albatross Diomedea Exulans at Marion Island: Longline Fishing and Environmental Influences
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D. C. Nel F. Taylor P. G. Ryan J. CooperThe subantarctic Prince Edward Islands (Marion and Prince Edward) support the largest breeding population of the Vulnerable wandering albatross Diomedea exulans. The number of birds breeding at Marion Island has fluctuated over the past three decades apparently as a result... -
Exchange of the Wandering Albatross Diomedea Exulans Between the Prince Edward and Crozet Islands: Implications for Conservation
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J. Cooper H. WeimerskirchExchange of 61 wandering albatrosses Diomedea exulans has been recorded between the French Crozet Islands and the South African Prince Edward Islands, 1 068 km apart in the Southern Ocean. Most movements of banded birds (57) have been westwards, from... -
Population, Breeding, Diet and Conservation of the Crozet Shag Phalacrocorax [atriceps] Melanogenis at Marion Island, 1994/95–2002/03
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. Crawford J. Cooper B. M. Dyer A. C. Wolfaardt D. Tshingana K. Spencer S. L. Petersen J. L. Nel D. G. Keith C. L. Holness B. Hanise M. D. Greyling M. Du ToitThe number of Crozet shags or cormorants Phalacrocorax [atriceps] melanogenis breeding at subantarctic Marion Island decreased by 68% from 841 pairs in 1994/95 to 272 pairs in 2002/03. The mean number of pairs at colonies also decreased and was significantly... -
Population Numbers of Fur Seals at Prince Edward Island, Southern Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M. N. Bester P. G. Ryan B. M. DyerDuring the period 17–22 December 2001, the onshore distribution and the abundance of Antarctic fur seals Arctocephalus gazella and Subantarctic fur seals A. tropicalis were determined for Prince Edward Island. Two breeding colonies of Antarctic fur seals were located on... -
Accounting for food requirements of seabirds in fisheries management – the case of the South African purse-seine fishery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. CrawfordIn South Africa, four of the seabirds that feed mainly on sardine Sardinops sagax and anchovy Engraulis encrasicolus have an unfavourable conservation status or a small population: African penguin Spheniscus demersus, Cape gannet Morus capensis, Cape cormorant Phalacrocorax capensis and... -
Bayesian analysis of allozyme markers indicates a single genetic population of kingklip Genypterus capensis off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WS Grant RW LeslieKingklip Genypterus capensis inhabit deep continental shelf and slope waters off southern Africa and are now largely harvested as a bycatch in trawl and longline fisheries for Cape hakes Merluccius spp. Regional differences in growth, vertebral count and otolith morphology... -
Temporal and spatial variability in the characteristics of Alexandrium fundyense blooms in the coastal zone of the Bay of Fundy, eastern Canada
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: FH Page JL Martin A Hanke MM LeGresleyThe abundance of the dinoglagellate Alexandrium fundyense has been monitored at four locations in the Bay of Fundy, eastern Canada, at weekly to monthly intervals since 1988. The date of first appearance of A. fundyense varied each year from Day... -
Euphausiid population structure and grazing in the Antarctic Polar Frontal Zone — austral autumn 2004
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ATF Bernard PW FronemanThe euphausiid community structure and grazing dynamics were investigated in the West Indian sector of the Polar Frontal Zone during the austral autumn 2004. Subsurface (200m) temperature profiles indicated that an intense frontal feature, formed by the convergence of the... -
Regionally coherent trends in colonies of African penguins Spheniscus demersus in the Western Cape, South Africa, 1987–2005
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LG Underhill RJM Crawford AC Wolfaardt PA Whittington BM Dyer TM Leshoro M Ruthenberg L Upfold J VisagieFrom 1987 to 2005, numbers of African penguins Spheniscus demersus breeding in South Africa's Western Cape Province increased by about 50%. Numbers decreased at the four northernmost colonies in the region: Lambert's Bay and the three colonies in Saldanha Bay,... -
Distribution patterns of striped mullet Mugil cephalus in mangrove creeks, Zanzibar, Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AW Mwandya --- Department of Animal Sciences and Production, Tanzania YD Mgaya --- Department of Aquatic Sciences and Technology, Tanzania MC Öhman --- Department of Zoology, Sweden I Bryceson --- , Norway M Gullström --- Department of Zoology, SwedenSpatial and seasonal variations in density of striped mullet Mugil cephalus were investigated in four mangrove creeks in Zanzibar, Tanzania, during a one-year cycle. Fish were collected monthly in the lower, intermediate and upper reaches of each creek using a... -
The dispersion of red knots Calidris canutus in Africa—is southern Africa a buffer for West Africa?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RW Summers --- , UK LG Underhill --- Animal Demography Unit, Department of Zoology, South Africa M Waltner --- , UKThe Siberian subspecies of the red knot Calidris canutus canutus spends the non-breeding season largely in West Africa (Mauritania and Guinea Bissau), where approximately half a million occurred in the 1980s. It was a rarely seen in southern Africa in... -
Analysing environmental and fishing effects on a short-lived species stock: the dynamics of the octopus Octopus vulgaris population in Senegalese waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Thiaw --- , Sénégal D Gascuel --- , France D Thiao --- , Sénégal OT Thiaw --- , Sénégal D Jouffre --- , SénégalShort-lived species are extremely dependent on the seasonal and interannual variability of environmental conditions, and determining their stock status is often difficult. This study investigates the effects of environmental variability and fishing pressure on the stock of octopus Octopus vulgaris... -
The reproductive style of Diplodus capensis (Sparidae) in southern Angola: rudimentary hermaphroditism or partial protandry?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TJ Richardson --- Department of Ichthyology and Fisheries Science, PO Box 94, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, PO Box 94, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, PO Box 94, South AfricaThe reproductive style of Diplodus capensis was examined in an unexploited coastal area in southern Angola. The mean length of females was significantly greater than that of males and, although not significant, females dominated the older age classes. The overall... -
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... -
The Marine Mammal Programme at the Prince Edward Islands: 38 years of research
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MN Bester --- Department of Zoology and Entomology, University of Pretoria, South Africa PJN de Bruyn WC Oosthuizen CA Tosh T McIntyre RR Reisinger M Postma DS van der Merwe M WegeThe Marine Mammal Programme (MMP) conducts research on pinnipeds and killer whales Orcinus orca at Marion Island, Prince Edward Islands, under the auspices of the Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria. The history of the... -
Population dynamics of southern elephant seals: a synthesis of three decades of demographic research at Marion Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PA Pistorius --- Department of Zoology, South Africa PJN de Bruyn --- Department of Zoology and Entomology, University of Pretoria, South Africa MN Bester --- Department of Zoology and Entomology, University of Pretoria, South AfricaSouthern elephant seal Mirounga leonina numbers declined precipitously throughout most of their circumpolar distribution since the 1950s. A long-term intensive demographic programme was initiated in 1983 on the relatively small population of southern elephant seals at sub-Antarctic Marion Island in... -
The biology of Barnard's dentex, Dentex barnardi (Teleostei: Sparidae), in southern Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TJ Richardson --- Department of Ichthyology and Fisheries Science, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South AfricaBarnard's dentex Dentex barnardi is a relatively slow-growing, late-maturing species with an intermediate longevity (maximum recorded age = 13 years). The length and age structures of the population were similar for males and females; however, the sex ratio was female... -
Chromosomal population structuring in carangids (Perciformes) between the north-eastern and south-eastern coasts of Brazil
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: IV Accioly --- Departamento de Biologia Celular e Genética, Centro de Biociências, Brasil LAC Bertollo --- Departamento de Genética e Evolução, Brasil GWWF Costa --- Departamento de Biologia Celular e Genética, Centro de Biociências, Brasil UP Jacobina --- Departamento de Biologia Celular e Genética, Centro de Biociências, Brasil WF Molina --- Departamento de Biologia Celular e Genética, Centro de Biociências, BrasilThe family Carangidae comprises 151 species, of which only 19 have been so far karyotyped, including a few representatives from the Western Atlantic Ocean. This study compared the cytogenetic features of three Atlantic carangids, Chloroscombrus chrysurus, Trachinotus goodei and T... -
Trends in numbers of crowned cormorants in South Africa, with information on diet
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Oceans and Coasts, Department of Environmental Affairs, South Africa BM Dyer --- Oceans and Coasts, Department of Environmental Affairs, South Africa D Geldenhuys --- , South Africa AB Makhado --- Oceans and Coasts, Department of Environmental Affairs, South Africa RM Randall --- , South Africa L Upfold --- Oceans and Coasts, Department of Environmental Affairs, South Africa J Visagie --- , South Africa L Waller --- Animal Demography Unit, South AfricaDuring 2008–2012, the number of crowned cormorants Phalacrocorax coronatus breeding in South Africa was c. 1 900 pairs, compared to 1 700 pairs for 1977–1981. Numbers at 10 islands in the Western Cape province fluctuated around a level of 1... -
Significant population genetic structuring of the holoplanktic scyphozoan Pelagia noctiluca in the Atlantic Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BJ Miller --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa S von der Heyden --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa MJ Gibbons --- Department of Biodiversity and Conservation Biology, South AfricaPelagia noctiluca is thought to have a global distribution, yet our understanding of genetic connectivity across the range of this problem animal is poor. Here, we investigate the genetic structure of populations off southern Africa using mitochondrial COI and nuclear... -
Evidence of deep genetic divergence between populations of an important recreational fishery species, Lichia amia L. 1758, around southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Henriques --- Centre for Ecology, Evolution and Behaviour, School of Biological Sciences, UK WM Potts --- Department of Ichthyology and Fisheries Science, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South Africa PW Shaw --- Institute of Biological, Environmental and Rural Sciences (IBRS), UKLichia amia is an important coastal recreational fishery species with a cosmopolitan distribution in the eastern Atlantic. In southern Africa, it is distributed from southern Angola to northern KwaZulu-Natal in South Africa. A recent biological survey revealed differences between Angolan... -
A review of the Oceanographic Research Institute's Cooperative Fish Tagging Project: 27 years down the line
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SW Dunlop --- , South Africa BQ Mann --- , South Africa RP van der Elst --- , South AfricaThe Oceanographic Research Institute's (ORI) Cooperative Fish Tagging Project was initiated in 1984 and is one of the most enduring and successful environmental projects of its kind in South Africa. By the end of 2011, 5 130 anglers had joined... -
South Africa's coastal-breeding white-breasted cormorants: population trends, breeding season and movements, and diet
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa RM Randall --- South African National Parks, South Africa PA Whittington --- East London Museum, South Africa L Waller --- CapeNature, South Africa BM Dyer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa DG Allan --- Durban Natural Science Museum, South Africa C Fox --- Ezemvelo-KZN Wildlife, South Africa AP Martin --- Department of Zoology, South Africa L Upfold --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa J Visagie --- CapeNature, South Africa S Bachoo --- Ezemvelo KZN Wildlife, South Africa M Bowker --- School of Life Sciences, South Africa CT Downs --- School of Life Sciences, South Africa R Fox --- Addo Elephant National Park, South African National Parks, South Africa J Huisamen --- CapeNature, South Africa AB Makhado --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa WH Oosthuizen --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, South Africa RH Taylor --- School of Life Sciences, South Africa JK Turpie --- Anchor Environmental Consultants, South AfricaWhite-breasted cormorants Phalacrocorax [carbo] lucidus breed around South Africa's coast and at inland localities. Along the coasts of the Northern, Western and Eastern Cape provinces, numbers breeding were similar during the periods 1977–1981 (1 116 pairs at 41 localities) and... -
Bottlenose dolphin Tursiops truncatus at São Tomé Island (São Tomé and Príncipe) — relative abundance, site fidelity and social structure
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Pereira --- Escola de Mar, Portugal F Martinho --- Escola de Mar, Portugal C Brito --- Escola de Mar, Portugal I Carvalho --- Escola de Mar, PortugalAlthough the bottlenose dolphin Tursiops truncatus is one of the most common cetacean species around São Tomé Island, Gulf of Guinea, little research has focused on this species in this region. This study investigated the population of bottlenose dolphins around... -
A bootstrap method for estimating bias and variance in statistical fisheries modelling frameworks using highly disparate datasets
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BÞ Elvarsson --- Science Institute, Iceland L Taylor --- Science Institute, Iceland VM Trenkel --- Ifremer [French Research Institute for the Exploitation of the Sea], France V Kupca --- HPC2N [High Performance Computing Center North], Umeå University, Sweden G Stefansson --- Science Institute, IcelandStatistical models of marine ecosystems use a variety of data sources to estimate parameters using composite or weighted likelihood functions with associated weighting issues and questions on how to obtain variance estimates. Regardless of the method used to obtain point... -
A breeding strategy for Acacia mearnsii (black wattle) in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: R. W. Dunlop --- , R. D. Bairnes --- , UK K. M. Nixon --- , S. F. Hagedorn --- ,The black wattle breeding programme that has served the wattle bark industry ofSouth Africa for the past five decades putlittleemphasis on improvingthe yield and quality ofthe timber, as timberwas not the product ofimportance. Today the timber is as important, ifnot... -
Low genetic diversity and high genetic differentiation among severely fragmented populations of the critically endangered tree Talbotiella gentii (Fabaceae)
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: D Dompreh --- School of Biological Sciences, UK MD Swaine --- School of Biological Sciences, UK A Price --- School of Biological Sciences, UKThe genetic diversity among 17 populations (including 10 newly discovered) of Talbotiella gentii (Fabaceae, Caesalpinioideae), a rare tree species endemic to Ghana, was assessed using random amplified polymorphic DNA (RAPD). A total of 80 polymorphic bands were generated from eight... -
Migration, pastoralists, HIV infection and access to care: the nomadic Fulani of northern Nigeria
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Abdulrazaq Garba Habib Jibril JumareThe burden of HIV infection among the nomadic Fulani of northern Nigeria is unknown. Migration — a way of life for this population — is known to increase the rate of HIV transmission and may limit individuals' access to treatment... -
Experiences of collaboration, coordination and efficiency in the delivery of HIV/AIDS home-based care in Zimbabwe
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: John Mazzeo --- Department of Anthropology, United States Loveness Makonese --- Department of Sociology and Anthropology, South AfricaThe difficulties of achieving successful collaboration between stakeholders can lead to uncoordinated and fragmented outcomes for HIV/AIDS programming, which has consequences for the immediate health and livelihood security of the intended beneficiaries. This article examines the collaboration between local, national... -
Amplified Fragment Length Polymorphism markers reveal population structuring in Dimidiochromis kiwinge (Teleostei: Cichlidae), a commercially-exploited species from Lake Malawi
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Daud Kassam Shingo Seki Kosaku YamaokaThe understanding of between- and within-population genetic variation and its partitioning on the basis of geographic origin is crucial in designing efficient fishing and conservation strategies of populations and/or species. However, for Lake Malawi's cichlid species, such population genetic studies... -
Variation in benthic macroinvertebrate assemblages in Ologe Lagoon, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TundeOT ImoobeThe community structure, diversity and seasonal variation of the benthic macroinvertebrates in Ologe Lagoon were studied at four sites during the dry and wet seasons of 2003 to provide environmental baseline data for the lagoon. The community comprised 29 taxa... -
Maturity, age and growth of Oreochromis karongae (Teleostei: Cichlidae) in Lakes Malawi and Malombe, Malawi
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Fanuel Kapute Emmanuel Kaunda Moses Banda Sinshuke MoriokaSize-at-50% maturity, age and growth, of Oreochromis (Nyasalapia) karongae ('chambo') in Lakes Malawi and Malombe were studied. Oreochromis karongae, a major component of the chambo species flock, attained 50% maturity at 225 mm TL in Lake Malawi and at 203... -
Phylogeographic structure of the caridean shrimp Palaemon peringueyi in South Africa: further evidence for intraspecific genetic units associated with marine biogeographic provinces
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PR Teske PW Froneman NP Barker CD McQuaidRecent genetic studies have shown that most widely distributed, passively dispersing invertebrates in southern Africa have regional intraspecific units that are associated with the three main marine biogeographic provinces (cool-temperate, warm-temperate and subtropical). The caridean shrimp Palaemon peringueyi also occurs... -
Long current to nowhere? — Genetic connectivity of Jasus tristani populations in the southern Atlantic Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S von der Heyden JC Groeneveld CA MattheeThe commercially exploited spiny lobster Jasus tristani has a disjunct distribution in the southern Atlantic Ocean, with populations occurring at the Tristan da Cunha Archipelago, Gough Island and on Vema Seamount. A distance of 2 000km separates Vema and the... -
Divergent trends in bank cormorants Phalacrocorax neglectus breeding in South Africa's Western Cape consistent with a distributional shift of rock lobsters Jasus lalandii
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford AC Cockcroft BM Dyer L UpfoldIn South Africa's Western Cape Province, numbers of bank cormorants Phalacrocorax neglectus breeding at 11 localities decreased from above 500 pairs during 1978–1987 to 350 pairs from 1995 to 2006. The most northern colony (Lambert's Bay) was extinct by 1999... -
Comparison of moult phenology of African penguins Spheniscus demersus at Robben and Dassen islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Wolfaardt LG Underhill RJM CrawfordDassen and Robben islands are approximately 50 km apart, and currently support the largest and third largest populations of African penguins Spheniscus demersus respectively. At both islands, moult is the most synchronised and seasonal activity of the annual cycle. The... -
Why do we need to integrate population genetics into South African marine protected area planning?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S von der Heyden --- Evolutionary Genomics Group, Department of Botany and Zoology, South AfricaSouth Africa is home to a wide variety of marine flora and fauna distributed over at least three biogeo-graphic provinces. Currently, 9% of the coastline is protected by ‘no-take’ marine protected areas (MPAs), but the distribution of MPAs is uneven... -
Recent population estimates and trends in numbers of albatrosses and giant petrels breeding at the sub-Antarctic Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PG Ryan --- , South Africa MGW Jones --- , South Africa BM Dyer --- Department of Environmental Affairs, South Africa L Upfold --- Department of Environmental Affairs, South Africa RJM Crawford --- Department of Environmental Affairs, South AfricaThe second mid-summer survey of surface-nesting seabirds at the Prince Edward Island group (Marion and Prince Edward islands) was conducted during December 2008, seven years after the initial mid-summer survey. Wandering albatrosses Diomedea exulans may have decreased slightly at Prince... -
Recent trends in numbers of four species of penguins at the Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Department of Environmental Affairs, South Africa PA Whittington --- , South Africa L Upfold --- Department of Environmental Affairs, South Africa PG Ryan --- , South Africa SL Petersen --- , South Africa BM Dyer --- Department of Environmental Affairs, South Africa J Cooper --- Animal Demography Unit, Department of Zoology, South AfricaFour species of penguin breed regularly at South Africa's Prince Edward Islands: king penguin Aptenodytes patagonicus, gentoo penguin Pygoscelis papua, macaroni penguin Eudyptes chrysolophus and southern rockhopper penguin E. chrysocome. In December 2008, it was estimated that some 65 000... -
Recent trends in numbers of Crozet shags breeding at the Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Department of Environmental Affairs, South Africa PG Ryan --- , South Africa BM Dyer --- Department of Environmental Affairs, South Africa L Upfold --- Department of Environmental Affairs, South AfricaNumbers of Crozet shags Phalacrocorax [atriceps] melanogenis breeding at Marion Island decreased by more than 70% from 840 pairs in 1994/1995 to 220 pairs in 2003/2004 and then increased to some 500 pairs in 2008/2009. The trends are thought to... -
A tale of two islands: contrasting fortunes for Subantarctic skuas at the Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PG Ryan --- , South Africa PA Whittington --- , South Africa RJM Crawford --- Department of Environmental Affairs, South AfricaSubantarctic skuas Catharacta antarctica are key predators of burrowing petrels at sub-Antarctic islands, and can be used to monitor the health of burrowing petrel populations. A survey of skuas at the Prince Edward Islands was conducted during December 2008, repeating... -
Estimates of numbers of kelp gulls and Kerguelen and Antarctic terns breeding at the Prince Edward Islands, 1996/1997–2008/2009
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PA Whittington --- , South Africa RJM Crawford --- Department of Environmental Affairs, South Africa BM Dyer --- Department of Environmental Affairs, South Africa PG Ryan --- , South AfricaBreeding numbers of Laridae and other surface-nesting seabirds have been monitored at sub-Antarctic Marion Island since 1996/1997 and counts of breeding birds were made at nearby Prince Edward Island in December 2001 and December 2008. Four species are regular breeders... -
Summer survey of fur seals at Prince Edward Island, southern Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MN Bester --- Mammal Research Institute, Department of Zoology and Entomology, South Africa PG Ryan --- , South Africa J Visagie --- , South AfricaThe onshore distributions and the abundances of Antarctic fur seals Arctocephalus gazella and Subantarctic fur seals A. tropicalis were determined at Prince Edward Island during 16-20 December 2008. This repeats a survey conducted in December 2001 and extends the area... -
RAPD markers demonstrate genetic diversity in Pterocarpus angolensis from Zimbabwe and Zambia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: E Chisha-Kasumu S Woodward A PriceUnderstanding the availability, extent and apportionment of genetic variability in natural populations of the southern African savanna tree Pterocarpus angolensis can provide reliable information on the evolutionary history and phylogenetic relationships of P. angolensis populations. This information will aid strategies... -
A comparison of deterministically predicted genetic gains with those realised in a South African Eucalyptus grandis breeding program
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: SD Verryn CL Snedden KA EatwellTree breeders attempt to predict the genetic gains that are likely to be achieved through selection and breeding of new generations, using stochastic or deterministic modelling. There are many factors that may cause a discrepancy between the predicted and realised... -
Historic and recent (2006) state of mangroves in small estuaries from Mlalazi to Mtamvuna in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: A Rajkaran --- Botany Department, South Africa J Adams --- Botany Department, South Africa R Taylor --- , South AfricaThe new forest type classification considers mangroves to be the rarest and most threatened of forest types in South Africa. The aim of this study was to determine the change in distribution and the current population and community structure of... -
Female-biased mortality in African penguins
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Pichegru --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, Department of Zoology, South Africa NJ Parsons --- Southern African Foundation for the Conservation of Coastal Birds, South AfricaSex-biased mortality can increase the risk of extinction of threatened populations. Numbers of the endangered African penguin Spheniscus demersus are decreasing rapidly and the smaller size of females, associated with their higher foraging effort during the breeding season, may place... -
Congruent, decreasing trends of gentoo penguins and Crozet shags at sub-Antarctic Marion Island suggest food limitation through common environmental forcing
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa BM Dyer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa L Upfold --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa AB Makhado --- Branch: Oceans and Coasts, Department of Environmental Affairs, South AfricaNumbers of gentoo penguins Pygoscelis papua and Crozet shags Phalacrocorax [atriceps] melanogenis breeding annually at Marion Island, one of South Africa's Prince Edward Islands in the South-West Indian Ocean, were strongly correlated over 19 split-years from 1994/1995 to 2012/2013. Both... -
Wind farms threaten southern Africa's cliff-nesting vultures
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ian Rushworth --- Scientific Services, South Africa Sonja Krüger --- Scientific Services, South AfricaWind farms have been shown to cause bird mortality in many studies. Proposals for the development of wind farms in Lesotho, which is core habitat for small and declining populations of the regionally Endangered Bearded Vulture Gypaetus barbatus meridionalis and... -
Prevalence of chronic kidney disease in a Nigerian family practice population
Item type: Journal Article • Journal: South African Family Practice • Authors: MO Afolabi --- Department of Family Medicine, Nigeria EA Abioye-Kuteyi --- Department of General Medical Practice, Nigeria FA Arogundade --- Department of Medicine, Renal Unit, Nigeria IS Bello --- Department of General Medical Practice, NigeriaBackground: Chronic kidney disease (CKD) is a global public health problem, with a greater burden and prohibitive cost of care particularly in developing countries. This study determined the prevalence of chronic kidney disease and identified its associated risk factors in... -
Prevalence of raised body mass indices and the association with high blood pressure and hyperglycaemia in the rural black population of Ga-Mothapo village, Capricorn District of Limpopo province
Item type: Journal Article • Journal: South African Family Practice • Authors: DG Sengwayo --- Department of Biomedical Sciences, MM Moraba --- Department of Medical Science, SCKM Motaung --- Department of Biomedical Sciences,Objective: To assess the prevalence of elevated body mass index and to establish whether there was an association between raised body mass index (BMI) and high blood pressure (BP) and hyperglycaemia in the rural population of Ga-Mothapo village, Limpopo province. -
HIV risk after release from prison: a pilot case-control study in Canada, France, Ivory Coast and South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Evelyne Vallières --- LICEF, Canada Karl Peltzer --- Human Sciences Research Council, South Africa Rémi Dongo Kouabenan --- Université Pierre Mendès France, France Denis Dagou Koménan --- Université Félix Houphouët-Boigny Cocody, Ivory Coast Sid Abdellaoui --- Université de Paris, France François Joseph Azoh --- École normale supérieure, Ivory Coast Pierre McDuff --- Université de Montréal, Canada Jacques Bergeron --- Université de Montréal, Canada Safiétou MBaye --- Électricité de France (EDF), FranceThis study aimed to assess HIV knowledge, risk perception and risk behaviour of ex-offenders at risk of new infection and to compare them with the general population. A case-control interview study was conducted with conveniently sampled ex-offenders and persons with... -
Sexual orientation and HIV risk among youth in South Africa: a brief report
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- Human Sciences Research Council, South AfricaThis study investigated the prevalence of homosexual orientation and HIV risk in a population-based survey among youth in South Africa. A cross-sectional population-based household survey was conducted using a multi-stage stratified cluster sampling approach. The total sample included 1859 sexually... -
Abundance of the Indo-Pacific bottlenose dolphin Tursiops aduncus off south-west Mauritius
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Webster --- Mauritius Marine Conservation Society, Mauritius VG Cockcroft --- Centre for Dolphin Studies, Department of Zoology, South Africa A Cadinouche --- SEABIOME, MauritiusThe abundance of Indo-Pacific bottlenose dolphins Tursiops aduncus off the south-west coast of Mauritius was estimated using capture-mark-recapture modelling. Over the past two decades this population has been subjected to ongoing anthropogenic disturbance in the form of extensive coastal development... -
Genetic diversity and gene flow in Clarias gariepinus from Lakes Victoria and Kanyaboli, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JE Barasa --- Department of Fisheries and Aquatic Sciences, Kenya R Abila --- Department of Fisheries Management and Aquaculture Technology, Kenya JP Grobler --- Department of Genetics, South Africa OG Dangasuk --- Department of Biological Sciences, Molecular Genetics Section, Kenya MN Njahira --- Biosciences eastern and central Africa - International Livestock Research Institute Hub (BecA-ILRI Hub), Kenya B Kaunda-Arara --- Department of Fisheries and Aquatic Sciences, KenyaThe African catfish Clarias gariepinus is an important species in the rapidly expanding aquaculture industry in East Africa. Most Kenyan catfish farmers use stocks with unknown genetic characteristics, with uncertified seeds and inter-basin exchange of brood stocks threatening the genetic... -
Winners and losers – responses to recent environmental change by South African seabirds that compete with purse-seine fisheries for food
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robert JM Crawford --- Branch Oceans and Coasts, South Africa Azwianewi B Makhado --- Branch Oceans and Coasts, South Africa Lauren J Waller --- CapeNature, South Africa Philip A Whittington --- Department of Zoology, South AfricaThere were recent changes in the distributions of the main prey of four seabirds off South Africa, with sardine Sardinops sagax and anchovy Engraulis encrasicolus shifting from South Africa's north-west coast towards the south-east. This contributed to numbers of African... -
Congregations of wintering Egyptian Vultures Neophron percnopterus in Afar, Ethiopia: present status and implications for conservation
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Volen Arkumarev --- Bulgarian Society for Protection of Birds/BirdLife Bulgaria, Bulgaria Vladimir Dobrev --- Bulgarian Society for Protection of Birds/BirdLife Bulgaria, Bulgaria Yilma D Abebe --- Ethiopian Wildlife and Natural History Society, Ethiopia Georgi Popgeorgiev --- Bulgarian Society for Protection of Birds/BirdLife Bulgaria, Bulgaria Stoyan C Nikolov --- Bulgarian Society for Protection of Birds/BirdLife Bulgaria, BulgariaThe Endangered Egyptian Vulture Neophron percnopterus congregates in communal roosts in the wintering areas and where food availability is high, where even a single threat might lead to substantial population declines. Thus, more research on the congregation sites is needed... -
Temporal and spatial variability in the abundance, biomass and distribution of Palaemon peringueyi (Decapoda: Crustacea) are influenced by biological but not physico-chemical factors in the permanently open Kariega Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NP Nyalungu --- South African National Parks, Cape Research Centre, South Africa AN Hodgson --- Department of Zoology and Entomology, South Africa PW Froneman --- Department of Zoology and Entomology, South Africa M Dopolo --- South African National Parks, Cape Research Centre, South Africa M Masubelele --- South African National Parks, Cape Research Centre, South AfricaBiological and physico-chemical factors affecting abundance and biomass of shrimp Palaemon peringueyi were investigated in 2010–2011 in the lower, middle and upper reaches of the freshwater-deprived permanently open Kariega Estuary. Shrimp abundance and biomass ranged from 0 to 88 ind... -
Fifteen years of annual Cape Parrot Poicephalus robustus censuses: current population trends and conservation contributions
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Colleen T Downs --- School of Life Sciences, South Africa Morgan Pfeiffer --- School of Life Sciences, South Africa Lorinda A Hart --- School of Life Sciences, South AfricaThe Cape Parrot Poicephalus robustus is endemic to South Africa and numbers have reportedly declined since the early 1900s. It is a forest specialist and food nomadic, moving between patches depending on fruit availability. This makes it difficult to estimate... -
Genetic variability of South African fiscal shrikes (Lanius collaris) across an altitudinal gradient
Item type: Journal Article • Journal: African Zoology • Authors: S. Soobramoney --- School of Biological & Conservation Sciences, University of KwaZulu-Natal, South Africa G.K. Campbell --- School of Life and Environmental Sciences, University of KwaZulu-Natal, South Africa C.T. Downs --- School of Biological & Conservation Sciences, University of KwaZulu-Natal, South Africa N.J. Adams --- School of Biological & Conservation Sciences, University of KwaZulu-Natal, South AfricaAn electrophoretic allozyme study of the fiscal shrike Lanius collaris, a widely distributed sub-Saharan passerine, was undertaken to investigate altitudinal variation in genetic structure within this species. It is a sedentary bird with limited dispersal so that subpopulations may be... -
The Mollusca inhabiting rice fields in northern Cameroon and their role as intermediate hosts for schistosomes
Item type: Journal Article • Journal: African Zoology • Authors: A. Ndassa --- General Biology Laboratory, Faculty of Science, Cameroon R. Mimpfoundi --- General Biology Laboratory, Faculty of Science, CameroonA systematic account is given of the freshwater gastropod and bivalve fauna of Ouro-Doukoudje, northern Cameroon, based on a survey conducted from July 2000 to June 2001 at 12 sites in rice fields spanning 800 ha. In total, 14 species... -
Aspects of the biology and ecology of the estuarine cirolanid isopod, Cirolana fluviatilis
Item type: Journal Article • Journal: African Zoology • Authors: Brent K. Newman --- Department of Zoology, South Africa Tristram H. Wooldridge --- Department of Zoology, South Africa Andy C. Cockcroft --- Department of Environmental Affairs and Tourism, Marine and Coastal Management Branch, South AfricaTrends in the distribution, population dynamics and reproductive biology of the estuarine cirolanid isopod, Cirolana fluviatilis, were investigated over a 12-month period in the warm–temperate Gamtoos River Estuary, by means of baited traps. Tolerance of adult isopods to combinations of... -
Ecological conditions for spread of the invasive snail Physa marmorata (Pulmonata: Physidae) in the Ivory Coast
Item type: Journal Article • Journal: African Zoology • Authors: Y. K. Bony --- Université de Perpignan, France N. C. Kouassi --- Station de Recherche en Pisciculture, CNRA, Ivory Coast D. Diomandé --- Université d’Abobo-Adjamé, Ivory Coast G. Gourene --- Université d’Abobo-Adjamé, Ivory Coast M. Verdoit-Jarraya --- Université de Perpignan, France J. P. Pointier --- Université de Perpignan, FrancePhysa marmorata, originally described from the Lesser Antilles, was introduced into Africa before 1900 and has previously been reported from Bénin, Togo, Ghana, Nigeria and South Africa. Here we show that it is also common in temporary ponds, fish ponds,... -
Evidence for density dependent population regulation in southern elephant seals in the southern Indian Ocean
Item type: Journal Article • Journal: African Zoology • Authors: P. A. Pistorius --- Department of Zoology and Entomology, South Africa F. E. Taylor --- Department of Zoology and Entomology, South Africa M. N. Bester --- Department of Zoology and Entomology, South Africa G. J. G. Hofmeyr --- Department of Zoology and Entomology, South Africa S. P. Kirkman --- Department of Zoology and Entomology, South AfricaThe means by which populations are regulated form a central theme in conservation biology, and much debate has revolved around density dependence as a mechanism driving population change. Marion Island (46°54‘S, 37°45‘E) is host to a relatively small breeding population... -
Decline of large mammals in the Katavi-Rukwa ecosystem of western Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: Tim Caro --- Department of Wildlife, Fish and Conservation Biology, U.S.A.In the Katavi-Rukwa ecosystem of western Tanzania, aerial censuses carried out between 1988 and 2002 show that populations of several large ungulate species had declined. Five competing factors that could be responsible for these changes were investigated. (i) Rainfall increased... -
Cryptic lineages of little free-tailed bats, Chaerephon pumilus (Chiroptera: Molossidae) from southern Africa and the western Indian Ocean islands
Item type: Journal Article • Journal: African Zoology • Authors: Peter John Taylor --- Durban Natural Science Museum, South Africa Jennifer Lamb --- University of KwaZulu-Natal, South Africa Devendran Reddy --- University of KwaZulu-Natal, South Africa Theshnie Naidoo --- University of KwaZulu-Natal, South Africa Fanja Ratrimomanarivo --- Vahatra, Madagascar Steven M. Goodman --- Vahatra, MadagascarWe investigate mitochondrial DNA and craniometric variation in southern African and Malagasy populations of the small and morphologically variable, house-roosting molossid bat, Chaerephon pumilus in relation to Malagasy populations of the related, smaller-sized species, C. leucogaster. Both cytochrome b and... -
Life history strategy and population characteristics of an unexploited riverine cyprinid, Labeo capensis, in the largest impoundment in the Orange River Basin
Item type: Journal Article • Journal: African Zoology • Authors: Henning Winker --- Department of Ichthyology and Fisheries Science, South Africa Olaf L.F. Weyl --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa Anthony J. Booth --- Department of Ichthyology and Fisheries Science, South Africa Bruce R. Ellender --- Department of Ichthyology and Fisheries Science, South AfricaThe life history of an endemic riverine African cyprinid, Labeo capensis, that dominates the larger ichthyofauna in a large impoundment in the Orange River Basin four decades after damming, was investigated. Both sexes grew at a similar rate until the... -
Integrating research with management: the case of Katavi National Park, Tanzania
Item type: Journal Article • Journal: African Zoology • Authors: T. Caro --- Department of Wildlife, Fish and Conservation Biology, U.S.A. M. Elisa --- Katavi National Park, Tanzania J. Gara --- Katavi National Park, Tanzania D. Kadomo --- Katavi National Park, Tanzania A. Martin --- Department of Wildlife, Fish and Conservation Biology, U.S.A. D. Mushi --- Katavi National Park, Tanzania C. Timbuka --- Katavi National Park, TanzaniaMany protected areas in Africa and elsewhere suffer from several external pressures making it difficult for management to set priorities. For example, aerial censuses show that many mammal populations in the Katavi-Rukwa ecosystem of western Tanzania are declining. Vehicle transect... -
Faecal progestagen profiles in wild southern white rhinoceros (Ceratotherium simum simum)
Item type: Journal Article • Journal: African Zoology • Authors: A. C. van der Goot --- School of Animal Biology, University of Western Australia, Australia F. Dalerum --- Department of Zoology and Entomology, South Africa A. Ganswindt --- Department of Zoology and Entomology, South Africa G. B. Martin --- School of Animal Biology, University of Western Australia, Australia R. P. Millar --- Department of Zoology and Entomology, South Africa M. C. J. Paris --- School of Animal Biology, University of Western Australia, AustraliaKnowledge of the reproductive biology of wild animals can provide valuable information for the development of appropriate in situ and ex situ management plans. The present study aimed to establish a non-invasive protocol for monitoring faecal progestagen metabolite (FPM) patterns... -
Chondrichthyan occurrence and abundance trends in False Bay, South Africa, spanning a century of catch and survey records
Item type: Journal Article • Journal: African Zoology • Authors: Lauren N. Best --- Percy FitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, University of Cape Town, South Africa Colin G. Attwood --- MA-RE Institute, Zoology Department, South Africa Charlene da Silva --- Department of Agriculture, South Africa Stephen J. Lamberth --- Department of Agriculture, South AfricaCommercial fishing in False Bay, South Africa, began in the 1600s. Today chondrichthyans are regularly taken in fisheries throughout the bay. Using a combination of catch, survey and life history data, the occurrence and long-term changes in populations of chondrichthyans... -
Fragmented populations of leopards in West-Central Africa: facing an uncertain future
Item type: Journal Article • Journal: African Zoology • Authors: Pauline Toni --- Université de Rennes 1, France Thierry Lodé --- Université de Rennes 1, FranceDuring recent decades, most endangered species have suffered serious population declines. Little has been documented on leopards inWest-Central Africa and as a result the efficiency of protection measures and wildlife managing practices can be questioned. Using 416 occurrences of leopards,... -
Spatial genetic pattern in an economically beneficial insect, the cyclical African wild silk moth (Gonometa postica)
Item type: Journal Article • Journal: African Zoology • Authors: Timothy C. Bray --- Department of Zoology and Entomology, South AfricaThe African wild silk moth (Gonometa postica) exhibits large inter-annual population size fluctuations in the Kalahari region of southern Africa. Spent cocoons from this species are currently being utilized in a local silk industry. An understanding of the recolonization dynamics... -
Microsatellite markers for population genetic studies of the rock firefinch, Lagonosticta sanguinodorsalis
Item type: Journal Article • Journal: African Zoology • Authors: Jacinta Abalaka --- Department of Genetics, South Africa Bengt Hansson --- Department of Biology, SwedenWe identified the first set of microsatellites for use in the rock firefinch (Lagonosticta sanguinodorsalis). First, we tested existing passerine microsatellite loci for cross-species amplification success in a small sample of rock firefinches and identified 10 loci that were seemingly... -
High population connectivity and Pleistocene range expansion in the direct-developing plough shell Bullia rhodostoma along the South African coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Muteveri --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa CA Matthee --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa RCK Bowie --- Museum of Vertebrate Zoology and Department of Integrative Biology, USA S von der Heyden --- Evolutionary Genomics Group, Department of Botany and Zoology, South AfricaPleistocene climatic and oceanographic changes have influenced the distribution of marine biodiversity in southern Africa. Most evidence, however, has been derived from rocky shore or demersal taxa; data on sandy shore species are limited, despite severe threats to many sandy... -
Spinner dolphins Stenella longirostris off south-west Mauritius: abundance and residency
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Webster --- Mauritius Marine Conservation Society, Mauritius VG Cockcroft --- Centre for Dolphin Studies, Department of Zoology, South Africa A Cadinouche --- SEABIOME, MauritiusSpinner dolphins Stenella longirostris longirostris off the south-west coast of Mauritius are subject to ongoing anthropogenic disturbance in the form of daily dolphin tourism, which has intensified since 1998. Abundance of this species was estimated using photo-identification data and mark-recapture... -
Solving the challenges of monitoring mobile populations: insights from studies of waterbirds in southern Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Hannah L Thomas --- Percy FitzPatrick Institute, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- Percy FitzPatrick Institute, DST–NRF Centre of Excellence, South Africa Graeme S Cumming --- Percy FitzPatrick Institute, DST–NRF Centre of Excellence, South AfricaHighly mobile species are difficult to monitor. It is often unclear from abundance estimates whether a population is genuinely declining or simply elsewhere. If the spatial and temporal scales of monitoring are inadequate, the data will only be useful if... -
Year-round territoriality in long-lived birds: rethinking the concept of carrying capacity
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Douglas Loewenthal --- , Dane M Paijmans --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- ,Adult African Black Oystercatchers Haematopus moquini are sedentary and territorial year round, with juveniles expressing strong natal philopatry. At four South African study sites (two mainland and two islands) breeding numbers more than doubled between the late 1970s/early 1980s and... -
Population metrics for fynbos birds, South Africa: densities, and detection and capture rates from a Mediterranean-type ecosystem
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Alan TK Lee --- Kirstenbosch Research Centre, South African National Biodiversity Institute, South Africa Phoebe Barnard --- Kirstenbosch Research Centre, South African National Biodiversity Institute, South Africa Philip AR Hockey --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaEstimates of bird numbers through quantification of density and range sizes are necessary for decisions regarding conservation status, yet counts of birds are often confounded by uncertainty of detection. The status of the endemic birds of the Fynbos biome is... -
Trends in African Black Oystercatcher Haematopus moquini populations between the early 1980s and early 2000s, with consideration of the influence of protected habitats and food availability
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Douglas Loewenthal --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Dane M Paijmans --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip W Haupt --- Seychelles Islands Foundation, Republic of Seychelles Philip AR Hockey --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaThe African Black Oystercatcher Haematopus moquini is classified as Near Threatened because the population size is small (<10 000) and numbers have decreased or were previously recorded as decreasing. Although human activity has increased in many parts of the species’... -
The status of the Damara Tern in the Eastern Cape, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Philip A Whittington --- East London Museum, South Africa Anthony J Tree --- Department of Zoology, South Africa Maëlle Connan --- Department of Zoology and Entomology, South Africa Elizabeth G Watkins --- , South AfricaThe Eastern Cape population of the Damara Tern Sternula balaenarum was estimated to be 25–29 pairs in the 2008/09 and 2009/10 breeding seasons. The population appears to be stable and has probably increased slightly since the early 1990s. An eastward... -
Mangrove expansion and population structure at a planted site, East London, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Sabine CL Hoppe-Speer --- Department of Botany, South Africa Janine B Adams --- Department of Botany, South Africa Anusha Rajkaran --- Department of Botany, South AfricaAvicennia marina (Forrsk.) Vierh. was planted in 1969 at Nahoon Estuary, East London, followed a few years later by the planting of Bruguiera gymnorrhiza (L.) Lam. and Rhizophora mucronata (L.) among the larger A. marina trees. This study tested the... -
Attracting female sex workers to HIV testing and counselling in Ethiopia: a qualitative study with sex workers in Addis Ababa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Wole Ameyan --- Liverpool School of Tropical Medicine, UK Caroline Jeffery --- Liverpool School of Tropical Medicine, UK Kassahun Negash --- Amref Health Africa, Ethiopia Etsegenet Biruk --- Amref Health Africa, Ethiopia Miriam Taegtmeyer --- Liverpool School of Tropical Medicine, UKDespite growing efforts to increase HIV testing and counselling (HTC) services for most at risk populations in Ethiopia, the use of these services by female sex workers (FSWs) remains low. With rising numbers of FSWs in Addis Ketema and concerns... -
On the road again: concurrency and condom use among Uganda truck drivers
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Elizabeth C Costenbader --- FHI 360 Headquarters, Kathryn Lancaster --- FHI 360 Headquarters, Leonard Bufumbo --- FHI 360 Uganda Country Office, Uganda Angela Akol --- FHI 360 Uganda Country Office, Uganda Greg Guest --- FHI 360 Headquarters,Long-distance truck drivers have been shown to be a critical population in the spread of HIV in Africa. In 2009, surveys with 385 Ugandan long-distance truck drivers measured concurrency point prevalence with two methods; it ranged from 37.4% (calendar-method) to... -
Reconsidering displacement in southern Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Chris de Wet --- Department of Anthropology, South AfricaIn the light of developments in the southern African region over the last number of years, the paper argues for a reconsideration, and an extension, of the way in which the concept of ‘displacement’ has conventionally been understood. It considers... -
Current conservation status of the Blue Swallow Hirundo atrocaerulea Sundevall 1850 in Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Steven W Evans --- SARCHI Chair on Biodiversity Value and Change, School of Mathematical and Natural Sciences, South Africa Ara Monadjem --- Department of Biological Sciences, South Africa Lizanne Roxburgh --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Andrew E McKechnie --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, Department of Zoology and Entomology, South Africa Ellizabeth M Baker --- Tanzanian Bird Atlas Project, United Republic of Tanzania Robert B Kizungu --- Organisation of Biodiversity Information and Conservation in Congo Kinshasa, Democratic Republic of Congo Ian T Little --- Endangered Wildlife Trust, South Africa Fadzai Matsvimbo --- BirdLife Zimbabwe, Zimbabwe Ronald K Mulwa --- National Museums of Kenya and Nature Kenya, Kenya Daniel Mwizabi --- Zambian Wildlife Authority, Zambia Dianah Nalwanga --- Nature Uganda, Uganda Kariuki Ndang'ang'a --- BirdLife International, Africa Partnership Secretariat, Kenya Leigh Combrink --- Endangered Wildlife Trust, South AfricaThe global Blue Swallow Hirundo atrocaerulea was classified as Vulnerable in 2010 on account of its small and rapidly declining population estimated at less than 1 500 pairs. We undertook this study to gain a better understanding of the current... -
Population increase and nest-site selection of Cattle Egrets Bubulcus ibis at a new colony in drylands of north-east Algeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Majda Sbiki --- Department of Natural and Life Sciences, Algeria Haroun Chenchouni --- Department of Natural and Life Sciences, Algeria Abdelkrim Si Bachir --- Department of Natural and Life Sciences, AlgeriaColony occupation by Cattle Egrets Bubulcus ibis at an arid location in north-east Algeria lasted from mid-March or April to August. The colony, which was founded in 2003, increased from 124 pairs in 2007 to 250 pairs in 2011 and... -
Inferring the links between breeding and wintering grounds in a Palearctic– African migratory bird, the Great Reed Warbler, using mitochondrial DNA data
Item type: Journal Article • Journal: African Zoology • Authors: Naglaa El-Arabany --- Department of Biology, Sweden Marjorie Sorensen --- Department of Zoology, UK Bengt Hansson --- Department of Biology, SwedenUnderstanding spatial connections between breeding and wintering populations is critical for developing sound conservation plans in migratory animals. However, for long-distance migratory songbird species wintering in sub-Saharan Africa, many of which are in a state of population decline, information on... -
Photo-identification and habitat use of Atlantic humpback dolphins Sousa teuszii around the Río Nuñez Estuary in Guinea, West Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CR Weir --- Ketos Ecology, UKEcological data for the Atlantic humpback dolphin Sousa teuszii are scant. Six on-effort Sousa teuszii sightings were recorded during 817.6 km of boat-based effort in the Río Nuñez region of Guinea during October and November 2013. Two incidental sightings were also... -
Spatial and seasonal patterns of European short-snouted seahorse Hippocampus hippocampus distribution in island coastal environments
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Otero-Ferrer --- Grupo de Investigación en Acuicultura, Spain R Herrera --- Dirección General de Ordenación del Territorio, Spain VM Tuset --- Instituto de Ciéncias del Mar (CSIC), Spain J Socorro --- Grupo de Investigación en Acuicultura, Spain L Molina --- Grupo de Investigación en Acuicultura, SpainThis study represents the first report on seahorses in the Macaronesian islands (North-East Atlantic), determining the spatial and seasonal abundance, population structure and physical appearance of European short-snouted seahorse Hippocampus hippocampus. Animals were surveyed off Gran Canaria Island in two... -
Abundance and degree of residency of humpback dolphins Sousa plumbea in Mossel Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BS James --- Mammal Research Institute, South Africa MN Bester --- Mammal Research Institute, South Africa GS Penry --- Mammal Research Institute, South Africa E Gennari --- Oceans Research, South Africa SH Elwen --- Mammal Research Institute, South AfricaIndian Ocean humpback dolphins Sousa plumbea inhabit nearshore waters from South Africa to eastern India. Humpback dolphins are vulnerable to conservation threats due to their naturally small population sizes and use of nearshore habitats, where human activities are highest. We... -
Human papillomavirus DNA testing on self-collected vaginal tampon samples as a cervical cancer screening test in a Gauteng population
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: E F Mnisi --- Gynaecological Oncology Unit, Department of Obstetrics and Gynaecology, G Dreyer --- Gynaecological Oncology Unit, Department of Obstetrics and Gynaecology, K L Richter --- Department of Medical Virology, University of Pretoria; Tshwane Academic Division, A Horton --- Department of Anatomical Pathology, University of Pretoria; Tshwane Academic Division, L C Snyman --- Gynaecological Oncology Unit, Department of Obstetrics and Gynaecology,Background: There is a need to simplify cervical cancer screening to reach more women. Tampon-collected specimens can be tested using molecular methods, but this type of self-screening has not been properly evaluated as a screening method in South Africa before... -
Dominance and population structure of freshwater crabs (Potamonautes perlatus Milne Edwards)
Item type: Journal Article • Journal: South African Journal of Zoology • Authors: M.J. Somers --- Department of Zoology, University of Stellenbosch, South Africa J.A.J. Nel --- Department of Zoology, University of Stellenbosch, South AfricaAlthough freshwater crabs, Potamonautes spp, are abundant (up to 23 crabs m-2) in southern African freshwater systems and form a major part of the diet of many vertebrates, little is known about their biology. Understanding crab population dynamics and behaviour,... -
Skull morphometrics of male Subantarctic fur seals (Arctocephalus tropicalis) from Marion and Gough Islands
Item type: Journal Article • Journal: African Zoology • Authors: Graham I.H. Kerley --- Zoology Department, South Africa Bryce R. Allen --- Zoology Department, South Africa Marthán N. Bester --- Department of Zoology and Entomology, South AfricaSkull morphometrics of two populations of Subantarctic fur seal (Arctocephalus tropicalis) were compared in order to identify possible geographic variation as an indicator of gene flow between the populations, as well as a potential tool to identify the source of... -
Killer whales (Orcinus orca) at Marion Island, Southern Ocean
Item type: Journal Article • Journal: African Zoology • Authors: M. Keith --- Mammal Research Institute, University of Pretoria, South Africa M.N. Bester --- Mammal Research Institute, University of Pretoria, South Africa P.A. Bartlett --- Mammal Research Institute, University of Pretoria, South Africa D. Baker --- Mammal Research Institute, University of Pretoria, South AfricaKiller whales (Orcinus orca) were studied using data obtained on an opportunistic basis between 1973 and 1996 at Marion Island (46°54’S, 37°45’E) in the Southern Indian Ocean. A clear seasonal pattern of occurrence with the main peak between October and... -
Estimation of the lion (Panthera leo) population in the southwestern Kgalagadi Transfrontier Park using a capture–recapture survey
Item type: Journal Article • Journal: African Zoology • Authors: J.G. Castley --- Conservation Services, South African National Parks, South Africa M.H. Knight --- Conservation Services, South African National Parks, South Africa M.G.L. Mills --- Conservation Services, South African National Parks, Endangered Wildlife Trust, and Mammal Research Institute, University of Pretoria, South Africa C. Thouless --- Department of Wildlife and National Parks, BotswanaA previous estimate of the lion (Panthera leo) population in the southwestern Kgalagadi Transfrontier Park (KTP) was made over 20 years ago. This together with increased fears regarding the viability of the population as a result of recent killings of... -
Juvenile survival and population regulation in southern elephant seals at Marion Island
Item type: Journal Article • Journal: African Zoology • Authors: P.A. Pistorius --- Mammal Research Institute, South Africa M.N. Bester --- Mammal Research Institute, South AfricaWe examined annual juvenile survival in southern elephant seals (Mirounga leonina) at Marion Island for the period 1994–1999 during which time the population was stable. Using mark–recapture models, we tested for age- and sex-specific differences in survival rates over the... -
Population status of black and white colobus monkeys (Colobus guereza) in Kakamega Forest, Kenya: are they really on the decline?
Item type: Journal Article • Journal: African Zoology • Authors: Peter J. Fashing --- Department of Ecology, Evolution, and Environmental Biology, U.S.AEastern black and white colobus monkeys, or guerezas (Colobus guereza), are among the few primate species that have traditionally been regarded as not being adversely affected by habitat degradation. This view was recently challenged by von Hippel et al. (2000)... -
Invasion of sandflats in Langebaan Lagoon, South Africa, by the alien mussel Mytilus galloprovincialis: size, composition and decline of the populations
Item type: Journal Article • Journal: African Zoology • Authors: N. Hanekom --- South African National Parks, South Africa P. Nel --- West Coast National Park, South AfricaSince the 1980s the introduced Mediterranean mussel (Mytilus galloprovincialis) has successfully invaded the southern African coastline and has become the dominant species on rocky intertidal shores of the west coast. This study investigates a recent extension of its distribution into... -
The effects of fences and lions on the ecology of African wild dogs reintroduced to Pilanesberg National Park, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Gus van Dyk --- Ecological Services, North West Parks and Tourism Board, South Africa Rob Slotow --- School of Life and Environmental Sciences, South AfricaWild dogs have been eradicated from most of South Africa. However, a large number of smaller isolated reserves offer the potential for metapopulation conservation management of this species through continued translocations among reserves. Wild dogs were released into the Pilanesberg... -
Genetic variation in three> Chersina angulata> (angulate tortoise) populations along the west coast of South Africa>
Item type: Journal Article • Journal: African Zoology • Authors: Mosa G.A. Lesia --- Department of Zoology, South Africa Margaretha D. Hofmeyr --- Department of Zoology, South Africa Maria E. D΄Amato --- Department of Zoology, South AfricaWe investigated genetic variation within and among three populations of Chersina angulata; two in the southwestern Cape (West Coast National Park and Dassen Island) of South Africa and Kleinzee in the northwestern parts of the species’ range. Mitochondrial DNA sequences... -
Age determination in jackals (Canis adustus Sundevall, 1846, andCanis mesomelas Schreber, 1778; Carnivora: Canidae) with reference to the age structure and breeding patterns of jackal populations in Zimbabwe
Item type: Journal Article • Journal: African Zoology • Authors: J. Bingham --- Central Veterinary Laboratory, Zimbabwe G.K. Purchase --- , ZimbabweMethods for determining the age of individual jackals using canine teeth were assessed as part of a study of the population structure of jackal species (side striped jackal, Canis adustus, and black backed jackal, Canis mesomelas), the main wildlife species... -
Distribution and status of the desert-dwelling giraffe (Giraffa camelopardalis angolensis) in northwestern Namibia
Item type: Journal Article • Journal: African Zoology • Authors: J.T. Fennessy [AN0001] K.E.A. Leggett --- Hoanib River Catchment Study, Namibia S. Schneider --- Hoanib River Catchment Study, NamibiaThe population density and distribution of desert dwelling giraffes was estimated in three study areas in the Hoanib River catchment, northwestern Namibia. Giraffe population densities (0.01 giraffe/km2) were equal to the lowest recorded in Africa with population numbers fluctuating over... -
Abundance and home ranges of feral cats in an urban conservancy where there is supplemental feeding: a case study from South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Jaclyn Tennent --- School of Biological and Conservation Sciences, South Africa Colleen T. Downs --- School of Biological and Conservation Sciences, South AfricaThere is much debate surrounding the impact of feral cats (Felis catus) on wildlife. Conservancies areusually areas where indigenous flora and fauna are protected and aliens excluded or managed. The University of KwaZulu-Natal’s Howard College campus (HCC) is an urban... -
Population surveys of the ice rat Otomys sloggetti robertsi in the Lesotho Drakensberg
Item type: Journal Article • Journal: African Zoology • Authors: Thabiso Mokotjomela --- School of Animal Plant and Environmental Sciences, South Africa Ute Schwaibold --- School of Animal Plant and Environmental Sciences, South Africa Neville Pillay --- School of Animal Plant and Environmental Sciences, South AfricaIncreasing environmental temperatures may lead to better survival of organisms that are usually susceptible to low temperatures. We investigated whether the numbers of the ice rat Otomys sloggetti robertsi, whose populations are regulated by low temperatures, have increased in the... -
Long-term response of an herbaceous sward to reduced grazing pressure and rainfall variability in a semi-arid South African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Tim G O'Connor --- SAEON, South AfricaReduced grazing pressure is expected to promote recovery of degraded semi-arid savanna. Transformation of degraded livestock ranches to a wildlife reserve in 1982 created a system with about one-third of the grazing pressure, which was maintained until 2011. Herbaceous composition... -
Estimating the effect of HIV/AIDS on fertility among Malawian women using demographic and health survey data
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Emmanuel Souza --- Department of Population Studies, Malawi Tom A Moultrie --- Centre for Actuarial Research, South AfricaSeveral studies have shown that HIV is an important distal factor that affects a woman's fertility. This study investigates the effect of HIV on fertility among Malawian women using data from the 2004 and 2010 demographic and health surveys. Specifically,... -
Using independent nest survey data to validate changes in reporting rates of Martial Eagles between the Southern African Bird Atlas Project 1 and 2
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Arjun Amar --- DST–NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa Daniël Cloete --- DST–NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa Madel Whittington --- Birds of Prey Programme, Endangered Wildlife Trust, Nossob camp, South AfricaRepeat monitoring is vital to measure biodiversity change. However, monitoring protocols may change, as survey techniques improve or different questions are asked. Such modifications may cause difficulties when examining changes in wildlife populations. The Southern African Bird Atlas Project (SABAP)... -
Assessing the value of wetlands to waterbirds: exploring a population-based index at flyway and regional levels
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Doug M Harebottle --- Animal Demography Unit, Department of Biological Sciences, South Africa Les G Underhill --- Animal Demography Unit, Department of Biological Sciences, South AfricaTraditionally, species richness, species diversity, total count, biomass, energy consumption and the Ramsar ‘1% threshold’ have been used to assess the importance of wetlands for waterbirds. Designation of wetlands of international importance (Ramsar sites) based on waterbirds has focused on... -
Current distribution and population size of the Blue Swallow Hirundo atrocaerulea in the southern Tanzanian highlands
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Steven W Evans --- SARCHI Chair on Biodiversity Value and Change, School of Mathematical and Natural Sciences, South Africa Elizabeth M Baker --- Tanzanian Bird Atlas Project, Tanzania Neil E Baker --- Tanzanian Bird Atlas Project, Tanzania Dirk Cilliers --- Unit for Environmental Sciences and Management (Zoology), South AfricaTwo surveys of Blue Swallows were conducted in the southern Tanzanian highland grasslands in order to determine the habitat preferences and estimate the size of this subpopulation. During the 2008/09 and 2012 surveys, a total distance of 3 635 km was... -
What does sustainability mean in the HIV and AIDS response?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Gemma Oberth --- Centre for Social Science Research (CSSR), South Africa Alan Whiteside --- Balsillie School of International Affairs, Waterloo, Canada and, South AfricaImmense progress has been made in the fight against HIV and AIDS. Achieving and exceeding the AIDS targets for the Millennium Development Goals (MDGs) was accomplished, in large part, due to an unprecedented financial investment from the international community. Following... -
Recent population trends of sooty and light-mantled albatrosses breeding on Marion Island
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Schoombie --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, South Africa RJM Crawford --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa AB Makhado --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, South Africa BM Dyer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, South AfricaSub-Antarctic Marion Island is one of the few islands where both species of Phoebetria albatrosses breed sympatrically. The last published assessment of their population trends, which reported counts up to 2008, concluded that the numbers of breeding pairs of sooty... -
Multiple cardiovascular disease risk factors in rural Kenya: evidence from a health and demographic surveillance system using the WHO STEP-wise approach to chronic disease risk factor surveillance
Item type: Journal Article • Journal: South African Family Practice • Authors: PM Chege --- Department of Family Medicine, KenyaBackground: To describe the distribution of obesity, hypertension, dysglycaemia and dyslipidaemia (which are risk factors for cardiovascular disease) using a Health and Demographic Surveillance System (HDSS) site in western Kenya. -
Indexing the human: from classification to a critical politics of transformation
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Thomas Cousins --- Department of Sociology and Social Anthropology, South Africa Lindsey Reynolds --- Department of Sociology and Social Anthropology, South Africa“Indexing the Human: From Classification to a Critical Politics of Transformation” consisted of a year-long programme of seminars, workshops and reading groups at Stellenbosch University in 2014–2015. The seminar series brought together local, regional and international scholars around four thematic... -
Inferring population trends of Araucaria angustifolia (Araucariaceae) using a transition matrix model in an old-growth forest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Giovani F Paludo --- Grupo Uso e Conservação dos Recursos Florestais, Brazil Miguel B Lauterjung --- Grupo Uso e Conservação dos Recursos Florestais, Brazil Maurício S dos Reis --- Núcleo de Pesquisas em Florestas Tropicais, Brazil Adelar Mantovani --- Grupo Uso e Conservação dos Recursos Florestais, BrazilMatrix population models may generate important information to prevent undesirable outcomes for endangered species. This is the case for Araucaria angustifolia, a Critically Endangered conifer, with little knowledge regarding its life history and trends in development over time. This study... -
Alcohol intake and micronutrient density in a population in transition: the transition and health during urbanisation in South Africa (THUSA) study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: M Serfontein --- Centre of Excellence for Nutrition, South Africa C Venter --- Centre of Excellence for Nutrition, South Africa A Kruger --- Centre of Excellence for Nutrition, South Africa U MacIntyre --- Institute of Human Nutrition, South Africa Pt Pisa --- Centre of Excellence for Nutrition, South AfricaObjective: To investigate the possibility of micronutrient dilution by alcohol in the diets of an adult population in nutrition transition. -
Current distribution, breeding population and habitat use of the globally threatened Grey-necked Picathartes Picathartes oreas in south-eastern Nigeria: a call for conservation action
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Fidelis Akunke Atuo --- Department of Natural Resource Ecology and Management, USA Samuel T Ivande --- AP Leventis Ornithological Research Institute (APLORI), Nigeria Zingfa J Wala --- AP Leventis Ornithological Research Institute (APLORI), Nigeria Shiiwa Manu --- AP Leventis Ornithological Research Institute (APLORI), Nigeria Timothy J O’Connell --- Department of Natural Resource Ecology and Management, USAThe Grey-necked Picathartes Picathartes oreas is a globally threatened bird species in Africa with a wild population of less than 10,000 individuals. The Nigerian population, which has been poorly studied, is restricted to the forest of Cross River. This study... -
Comparison of distance sampling estimates to a known population size of Ant-eating Chats Myrmecocichla formicivora
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ute Stenkewitz --- Icelandic Institute of Natural History, Iceland Eric Herrmann --- 48 Van Riebeeck Street, South AfricaLine-transect sampling was used to obtain abundance estimates of an Ant-eating Chat Myrmecocichla formicivora population to compare these with the true size of the population. The population size was determined by a long-term banding study, and abundance estimates were obtained... -
Grey Parrots Psittacus erithacus in Kampala, Uganda – are they becoming suburbanised?
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Immaculate-Odd Irumba --- Department of Biological Sciences, Uganda Derek Pomeroy --- Department of Biological Sciences, Uganda Michael Perrin --- Research Centre for African Parrot Conservation, School of Life Sciences, South AfricaThe globally Vulnerable Grey Parrot (Psittacus erithacus) has been seen in Kampala, Uganda’s capital city, in increasing numbers in recent years. This apparently new behaviour of a typically forest species is helped by the presence of many large trees, which... -
Mitochondrial DNA sequence variation in Hippopotamus amphibius from Kruger National Park, Republic of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Richard Beckwitt --- Department of Biology, USA Jessica Barbagallo --- Department of Biology, USA Nickolas Breen --- Department of Biology, USA Julia Hettinger --- Department of Biology, USA Angelo Liquori --- Department of Biology, USA Cesar Sanchez --- Department of Biology, USA Nathalia Vieira --- Department of Biology, USA William Barklow --- Department of Biology, USAPopulations of Hippopotamus amphibius have declined throughout Africa in recent years, and are expected to decline further. An understanding of the population genetics of individual populations of hippos is necessary for effective management. To that end, we sequenced a portion... -
Arm-associated measurements as estimates of true height in black and white young adults of both genders: an exploratory study, Pietermaritzburg, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Christen R Lahner --- Dietetics and Human Nutrition, School of Agricultural, Earth and Environmental Sciences, South Africa Susanna M Kassier --- Dietetics and Human Nutrition, School of Agricultural, Earth and Environmental Sciences, South Africa Frederick J Veldman --- Dietetics and Human Nutrition, School of Agricultural, Earth and Environmental Sciences, South AfricaObjective: To determine the accuracy of arm-associated anthropometric measurements as estimates of true height. -
Distribution patterns of the ghost crab Ocypode cursor on sandy beaches of a tropical island in the Cabo Verde archipelago, Eastern Central Atlantic
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Rodrigues --- Departamento de Engenharias e Ciências do Mar, R Freitas --- Departamento de Engenharias e Ciências do Mar, N de C Delgado --- Direcção Geral dos Recursos Marinhos, A Soares-Gomes --- Sediment Ecology Laboratory, Marine Biology Department, BrazilThe spatial distribution of the ghost crab Ocypode cursor was determined for beaches on eastern Boa Vista Island, Cabo Verde Archipelago. The main objectives were to analyse the across-shore distribution by means of burrow counts and to identify preferential zones... -
Ingestion rates and grazing impact of the brackwater mussel Brachidontes virgiliae in Lake St Lucia, iSimangaliso Wetland Park, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HA Nel --- School of Life Sciences, South Africa R Perissinotto --- School of Life Sciences, South Africa NK Carrasco --- School of Life Sciences, South AfricaBivalves feed on a combination of phytoplankton and zooplankton and have the potential to impact considerably the planktonic biomass, especially when they occur in high densities, such as in oyster and mussel beds. The brackwater mussel Brachidontes virgiliae is numerically... -
Lifetable demography and population growth of the rotifer Brachionus angularis in Kenya: influence of temperature and food density
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EO Ogello --- Graduate School of Fisheries and Environmental Sciences, Japan H-J Kim --- Graduate School of Fisheries and Environmental Sciences, Japan K Suga --- Graduate School of Fisheries and Environmental Sciences, Japan A Hagiwara --- Graduate School of Fisheries and Environmental Sciences, JapanLifetable demography and reproductive traits of a Kenyan strain of the rotifer Brachionus angularis were investigated using individual and small batch culture approaches. The rotifer was identified morphologically before conducting studies at 20, 25 and 30 °C, using Chlorella vulgaris... -
Cape cormorants decrease, move east and adapt foraging strategies following eastward displacement of their main prey
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RJM Crawford --- Branch: Oceans & Coasts, Department of Environmental Affairs, South Africa RM Randall --- South African National Parks, South Africa TR Cook --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa BM Dyer --- Branch: Oceans & Coasts, Department of Environmental Affairs, South Africa R Fox --- Addo Elephant National Park, South African National Parks, South Africa D Geldenhuys --- CapeNature, Voëlklip, South Africa J Huisamen --- CapeNature, Voëlklip, South Africa C McGeorge --- CapeNature, Voëlklip, South Africa MK Smith --- South African National Parks, South Africa L Upfold --- Branch: Oceans & Coasts, Department of Environmental Affairs, South Africa J Visagie --- CapeNature, Scientific Services, Assegaaibosch Nature Reserve, South Africa LJ Waller --- CapeNature, Voëlklip, South Africa PA Whittington --- Department of Zoology, South Africa CG Wilke --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries, South Africa AB Makhado --- Branch: Oceans & Coasts, Department of Environmental Affairs, South AfricaNumbers of Cape cormorants Phalacrocorax capensis breeding in South Africa decreased by nearly 50% from approximately 107 000 pairs in 1977–1981 to 57 000 pairs in 2010–2014. Although four colonies had >10 000 pairs in 1977–1981, there was just one... -
Spatial variability in branchial basket meristics and morphology of southern African sardine Sardinops sagax
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: I Idris --- Marine Research Institute and Department of Biological Sciences, South Africa CL Moloney --- Marine Research Institute and Department of Biological Sciences, South Africa CD van der Lingen --- Marine Research Institute and Department of Biological Sciences, South AfricaWe examined spatial variability in meristic and morphological characteristics of the branchial basket of sardine Sardinops sagax collected from four geographical regions around the southern African coast, namely Namibia and the South African west, south and east coasts. Our analysis... -
Community ecology of the metazoan parasites of snoek Thyrsites atun (Euphrasen, 1791) (Perciformes: Gempylidae) off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MAI Nunkoo --- Department of Biological Sciences, South Africa CC Reed --- Department of Biological Sciences, South Africa SE Kerwath --- Department of Biological Sciences, South AfricaThe parasite assemblage of snoek Thyrsites atun, a commercially important fish in the Benguela system, was examined over a one-year period. In all, 16 parasite taxa including eight new host records (Bolbosoma vasculosum, Caligus coryphaenae, Caligus dakari, Corynosoma australe, Hatschekia... -
Atlantic humpback dolphins Sousa teuszii in the Saloum Delta (Senegal): distribution, relative abundance and photo-identification
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CR Weir --- Ketos Ecology, UKDuring October and November 2015, the first systematic survey of Sousa teuszii was carried out in the Saloum Delta (Senegal, West Africa), comprising 1 617.5 km of boat-based survey coverage. Thirty sightings were recorded in the Saloum and Diomboss rivers,... -
Monitoring the recovery of a previously exploited surf-zone fish community in the St Lucia Marine Reserve, South Africa, using a no-take sanctuary area as a benchmark
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- Oceanographic Research Institute, South Africa H Winker --- South African National Biodiversity Institute, South Africa JQ Maggs --- Oceanographic Research Institute, South Africa SN Porter --- Oceanographic Research Institute, South AfricaLimiting accessibility to a fishing area can reduce fishing effort effectively and may therefore promote local recovery of depleted stocks. In January 2002, beach driving was banned in South Africa, thereby reducing angler access to large areas of the coastline,... -
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... -
Population estimates of the breeding birds of the Tinhosas islands (Gulf of Guinea), the only major seabird colony of the eastern tropical Atlantic
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Simon Valle --- Division of Biology and Conservation Ecology, School of Science and the Environment, UK Nuno Barros --- Portuguese Society for the Study of Birds, Marine Department, Portugal Iván Ramírez --- BirdLife International, Belgium Ross M Wanless --- Seabird Division, BirdLife South Africa, South AfricaThe Tinhosas islands, in São Tomé e Príncipe, host the most important seabird breeding colony in the Gulf of Guinea, but information on its conservation status was hitherto unpublished or anecdotal, the last assessment having been performed in 1997. A... -
Alarming decline and range reduction of the highly threatened Great Bustard Otis tarda in Morocco
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Juan Carlos Alonso --- Department of Evolutionary Ecology, Spain Carlos Palacín --- Department of Evolutionary Ecology, Spain Alejandro Onrubia --- Fundación MIGRES, Spain Rachid Aboulouafae --- SPCDRN/DREFLCD du Rif, Haut Commissariat aux Eaux et Forêts et à la Lutte Contre la Désertification (HCEFLCD), Morocco Mohamed Amezian --- GREPOM Unité régionale Tanger-Tétouan, Morocco Abdelaziz El Idrissi Essougrati --- GREPOM Unité régionale de Rabat, Morocco Rachid El Khamlichi --- GREPOM Unité régionale Tanger-Tétouan, Morocco Mohamed Noaman --- Service de la Conservation de la Flore et de la Faune Sauvage, MoroccoA Great Bustard Otis tarda survey carried out in spring 2015 in Morocco confirmed the decline of this highly endangered population. Bustards were only seen at two of the seven leks occupied ten years ago. The total number of birds... -
Assessing the accuracy of plotless density estimators using census counts to refine population estimates of the vultures of Kruger National Park
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Campbell Murn --- Hawk Conservancy Trust, UK André Botha --- Birds of Prey Programme, South AfricaBreeding population estimates for three vulture species in Kruger National Park (KNP), South Africa, were made in 2013 using data from aerial censuses and a plotless density estimator (PDE). PDEs are distance-based methods used to assess sparse populations unsuitable for... -
Selective predation and prey class behaviour as possible mechanisms explaining cheetah impacts on kudu demographics
Item type: Journal Article • Journal: African Zoology • Authors: Douglas F Makin --- Centre for African Conservation Ecology, South Africa Graham IH Kerley --- Centre for African Conservation Ecology, South AfricaA number of predator–prey studies show that certain prey demographic classes are targeted over others. The possible mechanisms driving these effects can be two-fold. Firstly, a preference for a certain demographic class results in selective predation by a predator. Secondly,... -
Characterisation of microsatellite markers in the Spotted Sand Lizard (Pedioplanis lineoocellata) shows low levels of inbreeding and moderate genetic diversity on a small spatial scale
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Krystal A. Tolley --- , , South Africa Ryan J. Daniels --- , , South Africa Kevin A. Feldheim --- , , USAPopulation genetic methods can be useful for understanding spatial genetic patterns, gene flow and diversity. While genetic markers such as gene sequences are useful for understanding broad scale phylogeographic patterns, microsatellite markers allow for inferences within species and on smaller... -
Sexual dimorphism in morphological traits and scaling relationships in two populations of Gallotia stehlini (Fam. Lacertidae: Squamata) from Gran Canaria
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Cristina Rivero Suárez --- , , Spain Miguel Angel Rodríguez-Domínguez --- , Miguel Molina-Borja --- , , SpainLizards of the genus Gallotia, endemic to the Canary Islands, show morphological and colouration varieties that are related to within island variation in orographic and climatic characteristics. This study examines sexual size dimorphism (SSD) within and between population variation in... -
Analysis of genetic diversity in Rose’s mountain toadlet (Capensibufo rosei) using novel microsatellite markers
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Jessica M. da Silva --- , South Africa Kevin A. Feldheim --- , USA Ryan J. Daniels --- , South Africa Shelley Edwards --- , South Africa Krystal A. Tolley --- , South AfricaOn the Cape Peninsula, Capensibufo rosei is known from only two isolated breeding populations within Table Mountain National Park. Because of its declining state, there is an urgent need to understand the genetic diversity, population structure and patterns of movement... -
Status of the Nile crocodile population in Pongolapoort Dam after river impoundment
Item type: Journal Article • Journal: African Zoology • Authors: Garreth Champion --- School of Life Sciences, South Africa Colleen T Downs --- School of Life Sciences, South AfricaThe major Nile crocodile Crocodylus niloticus populations in South Africa are threatened by pollution, habitat alteration/destruction, and poaching. This has highlighted the importance of other minor populations. The Phongola River Nile crocodile population was previously considered as unsubstantial. Consequently, we... -
Broad- and narrow-sense heritabilities in a South African cloned open-pollinated Eucalyptus grandis breeding population
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: CL Snedden CZ Roux SD VerrynGenetic variances and heritabilities of a 66-month old cloned Eucalyptus grandis breeding population of families, derived from open-pollinated selections, were estimated. The genetic variance for the growth traits was largely additive genetic variance, whereas the proportion of non-additive genetic variance... -
Assessment of three-year DBH and height data and genetic gain prediction for five Acacia mearnsii (black wattle) subpopulations in South Africa using REML/BLUP
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: SL Beck J de Guisti AK Louw MDV ResendeRecent research has shown Acacia mearnsii (black wattle) to be a source of high-quality pulp. This led to a change in the emphasis in the breeding programme at the Institute for Commercial Forestry Research, from improving bark yield and quality,... -
Genetic stock structure of white steenbras Lithognathus lithognathus (Cuvier, 1829), an overexploited fishery species in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RH Bennett --- South African Institute for Aquatic Biodiversity, South Africa K Reid --- Molecular Ecology and Evolution Programme, Department of Genetics, South Africa G Gouws --- South African Institute for Aquatic Biodiversity, South Africa P Bloomer --- Molecular Ecology and Evolution Programme, Department of Genetics, South Africa PD Cowley --- South African Institute for Aquatic Biodiversity, South AfricaWhite steenbras Lithognathus lithognathus (Teleostei: Sparidae) is an overexploited marine fish species endemic to South Africa. Overexploitation in recreational, subsistence and commercial fisheries has resulted in stock collapse and the need for improved management of the species. Adults are thought... -
Kalahari vulture declines, through the eyes of meerkats
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jack B Thorley --- Department of Zoology, UK Tim Clutton-Brock --- Department of Zoology, UKVulture populations are experiencing rapid declines across the globe. While the declines have been most precipitous in Asia, recent reports suggest African populations are likewise imminently threatened. As the factors underlying these general population trends are multifaceted and will vary... -
The decline of an urban Hooded Vulture Necrosyrtes monachus population in Dakar, Senegal, over 50 years
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Wim C Mullié --- , Senegal François-Xavier Couzi --- Société d’Etudes Ornithologiques de la Réunion, France Moussa Sega Diop --- AfriWet Consultants, Senegal Bram Piot --- Cité Ndiatte Almadies, Senegal Theo Peters --- Royal Netherlands Embassy, Senegal Pierre A Reynaud --- 275 Rue Robert Schuman, France Jean-Marc Thiollay --- 2 Rue de la Rivière, FranceAs in many West African cities, in Dakar Hooded Vultures Necrosyrtes monachus have always been characteristic urban scavengers. The recent decline of Hooded Vultures in other parts of Africa, mainly eastern Africa, has been the reason in 2015 for up-listing... -
Productivity of the declining Bearded Vulture Gypaetus barbatus population in southern Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Sonja C Krüger --- Ezemvelo KZN Wildlife, South Africa Arjun Amar --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaRecent research has shown that anthropogenic influences are driving the abandonment of breeding territories in the declining southern African Bearded Vulture Gypaetus barbatus meridionalis population. Survival rates appear to be low (86% for adults) due to poisoning and collisions with... -
Does high-density stocking affect perennial forbs in mesic grassland?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Sindiso Chamane --- School of Life Sciences, South Africa Kevin P Kirkman --- School of Life Sciences, South Africa Craig Morris --- Agricultural Research Council–Animal Production Institute, c/o University of KwaZulu-Natal, South Africa Tim O’Connor --- South African Environmental Observation Network, South AfricaLivestock production is an appropriate land use for mainstreaming biodiversity conservation, but little is known about the impact of grazing strategies on forbs that contribute most species, in grasslands. This study compared the effects of high-density, short-duration stocking (HDG) with... -
Population structure of the sicklefin lemon shark Negaprion acutidens within the Curieuse Marine National Park, Seychelles
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RD Hodgkiss --- Global Vision International Seychelles, Seychelles A Grant --- Global Vision International Seychelles, Seychelles JHR McClelland --- Global Vision International Seychelles, Seychelles R Quatre --- Seychelles National Parks Authority, Seychelles B Rademakers --- Global Vision International Seychelles, Seychelles C Sanchez --- Nature Seychelles, Seychelles C Mason-Parker --- Global Vision International Seychelles, SeychellesThis study produced the first data on population parameters for sicklefin lemon shark Negaprion acutidens at the granitic Seychelles Islands, adding to a limited catalogue of species information. Juveniles at a site in the Curieuse Marine National Park were tagged... -
HIV prevention needs for men who have sex with men in Swaziland
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Bhekie Sithole --- Health Communication Capacity Collaborative, SwazilandMen who have sex with men (MSM) have a high HIV burden and also often face multiple other challenges accessing HIV services, including legal and social issues. Although Swaziland recently started responding with interventions for MSM, significant gaps still exist... -
Reassessing the invasion of South African waters by the European shore-crab Carcinus maenas
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CA Mabin --- Centre for Invasion Biology, Department of Botany and Zoology, South Africa JRU Wilson --- Centre for Invasion Biology, Department of Botany and Zoology, South Africa JJ Le Roux --- Centre for Invasion Biology, Department of Botany and Zoology, South Africa TB Robinson --- Centre for Invasion Biology, Department of Botany and Zoology, South AfricaThe European shore-crab Carcinus maenas has been present in South Africa since 1983. Despite this species’ international reputation as a biological invader, its distribution in this region has only been considered by three outdated ‘snapshot surveys.’ The present study is... -
Geostatistical modelling of the spatial life history of post-larval deepwater hake Merluccius paradoxus in the Benguela Current Large Marine Ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Jansen --- Benguela Current Commission, Namibia K Kristensen --- Technical University of Denmark – National Institute of Aquatic Resources (DTU Aqua), Denmark TP Fairweather --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa P Kainge --- Ministry of Fisheries and Marine Resources (MFMR), Namibia JN Kathena --- Ministry of Fisheries and Marine Resources (MFMR), Namibia MD Durholtz --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa JE Beyer --- Technical University of Denmark – National Institute of Aquatic Resources (DTU Aqua), Denmark UH Thygesen --- Technical University of Denmark – National Institute of Aquatic Resources (DTU Aqua), DenmarkOptimal and sustainable management of fish resources cannot be ensured without a thorough understanding of the migration patterns and population (demographic stock) structure. Recent studies suggest that these aspects of the economically and ecologically important deepwater hake Merluccius paradoxus are... -
Systematic reinstatement of Schilbe depressirostris (Peters, 1852), based on differences in DNA barcoding and morphology, from Schilbe intermedius Rüppell, 1832 (Siluriformes, Schilbeidae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HF van der Bank --- African Centre for DNA Barcoding, Kingsway Campus, South Africa BS Bezeng --- African Centre for DNA Barcoding, Kingsway Campus, South Africa PH Skelton --- South African Institute for Aquatic Biodiversity, South AfricaClimate change poses an unprecedented threat to biodiversity worldwide. Consequently, unrecognised taxa may not receive adequate conservation attention to survive. We used molecular and morphological data to address the challenge of species delimitation within the genus Schilbe. The presence or... -
Game fence presence and permeability influences the local movement and distribution of South African mammals
Item type: Journal Article • Journal: African Zoology • Authors: Tara J Pirie --- People and Wildlife Research Group, School of Biological Sciences, UK Rebecca L Thomas --- People and Wildlife Research Group, School of Biological Sciences, UK Mark DE Fellowes --- People and Wildlife Research Group, School of Biological Sciences, UKFences are utilised throughout the world to restrict the movements of wildlife, protecting them from threats and reducing human–wildlife conflict. In South Africa the number of privately-owned fenced game reserves has greatly increased in recent years, but little is known... -
Molecular research on the systematically challenging smoothhound shark genus Mustelus: a synthesis of the past 30 years
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SN Maduna --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa AE Bester-van der Merwe --- Molecular Breeding and Biodiversity Group, Department of Genetics, South AfricaThe species-rich genus Mustelus (smoothhounds) of the shark family Triakidae is one of the most bio-economically important groups of elasmobranchs in the world’s oceans. Despite the commercial value of Mustelus, the systematics of the group remains largely unresolved and there... -
Realised genetic gains and estimated genetic parameters of two Eucalyptus grandis × E. urophylla hybrid breeding strategies
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Gert J van den Berg --- Mondi Forests (Pty) Ltd, South Africa Steven D Verryn --- Faculty of Natural and Agricultural Sciences, South Africa Paxie W Chirwa --- Faculty of Natural and Agricultural Sciences, South Africa Francois van Deventer --- Mondi Forests (Pty) Ltd, South AfricaConventionally, Eucalyptus grandis × E. urophylla (GU) hybrid material is first tested as seedlings in progeny trials for at least four years before ortets are selected and ramets of the selected ortets are propagated to test in clonal trials. The... -
Population connectivity of an overexploited coastal fish, Argyrosomus coronus (Sciaenidae), in an ocean-warming hotspot
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Henriques --- Evolutionary Genomics Group, Department of Botany and Zoology, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South Africa CV Santos --- Faculdade de Ciências da Universidade Agostinho Neto (FCUAN), Angola WHH Sauer --- Department of Ichthyology and Fisheries Science, South Africa PW Shaw --- Department of Ichthyology and Fisheries Science, South AfricaThe West Coast dusky kob Argyrosomus coronus is a commercially exploited fish with a distribution confined to the Angola–Benguela Frontal Zone (ABFZ) of the southeastern Atlantic Ocean. A previous study revealed that during a recent period of local warming the... -
Survival estimates for the greater crested tern Thalasseus bergii in southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Payo-Payo --- Group of Ecology and Animal Demography (GEDA), Spain A Sanz-Aguilar --- Group of Ecology and Animal Demography (GEDA), Spain D Gaglio --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa RB Sherley --- Environment and Sustainability Institute, University of Exeter, United Kingdom TR Cook --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa R Altwegg --- Statistics in Ecology, Environment and Conservation, Department of Statistical Sciences, and African Climate and Development Initiative, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaThe nominate race of the greater crested tern Thalasseus bergii breeds only along the coast of the Benguela region (west coast) of southern Africa, where its population is increasing, in contrast to other species of breeding seabirds in the region... -
Multiple disturbance patterns and population structure of a tropical tree species, Afzelia africana (Leguminosae–Caesalpinioideae), in two contrasting bioclimatic zones of the Republic of Benin
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Ogoudje I Amahowe --- Laboratoire d’Ecologie, de Botanique et de Biologie végétale, Faculté d’Agronomie, République du Bénin Samadori SH Biaou --- Laboratoire d’Ecologie, de Botanique et de Biologie végétale, Faculté d’Agronomie, République du Bénin Armand K Natta --- Laboratoire d’Ecologie, de Botanique et de Biologie végétale, Faculté d’Agronomie, République du Bénin Rodrigue O Balagueman --- Laboratoire d’Ecologie, de Botanique et de Biologie végétale, Faculté d’Agronomie, République du BéninUnderstanding how multiple disturbances affect species population structure is crucial for designing a better conservation strategy of threatened species. In this paper, we assessed the disturbance patterns and evaluated their effects on the population structure of Afzelia africana, in two... -
Alcohol use and problem drinking in South Africa: Results from a national-population-based survey 2014-2015
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- HIV/AIDS/STIs/and TB (HAST), South Africa Supa Pengpid --- Department of Research and Innovation, South AfricaThe aim of this study was to estimate the pattern of alcohol use among South African adults by their socio-demographic and health status indicators. We analysed data from a 2014–2015 South African national population-based survey which sampled 22 752 adults... -
Genetic diversity and population connectivity of the sea urchin Tripneustes gratilla along the South African coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Brink --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa R Dale Kuys --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa C Rhode --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa BM Macey --- Branch: Fisheries Management, Department of Agriculture, South Africa KW Christison --- Branch: Fisheries Management, Department of Agriculture, South Africa R Roodt-Wilding --- Molecular Breeding and Biodiversity Group, Department of Genetics, South AfricaThe collector sea urchin Tripneustes gratilla has been identified as a species with potential for aquaculture production in South Africa. The species’ roe is considered a culinary delicacy in Asia and Europe. However, T. gratilla remains genetically uncharacterised in South... -
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... -
Programmatic mapping to determine the size and dynamics of sex work and injecting drug use in Mauritius
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Amita Pathack --- National AIDS Secretariat, Mauritius Ahmed Saumtally --- National AIDS Secretariat, Mauritius Sarah Soobhany --- National AIDS Secretariat, Mauritius Carly A Comins --- National AIDS Secretariat, Mauritius Said A H Kinoo --- National AIDS Secretariat, Mauritius Faran Emmanuel --- Centre for Global Public Health, CanadaHIV in Mauritius is in a concentrated phase. Most HIV infection is among key populations (KPs) including female sex workers (FSW), people who inject drugs (PWID), men who have sex with men (MSM), and transgender sex workers (TGSW). The objective... -
Hooded Vultures Necrosyrtes monachus nearly extirpated from Edo State, Nigeria: a report on the avian scavenger community
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Esther Nosazeogie --- AP Leventis Ornithological Research Institute, University of Jos, Nigeria Talatu Tende --- AP Leventis Ornithological Research Institute, University of Jos, Nigeria Ara Monadjem --- Department of Biological Sciences, SwazilandAvian scavengers, by feeding on carrion and other organic matter, provide critical ecosystem services. Vultures, the only obligate avian scavengers, have reportedly experienced massive population declines in Africa yet current knowledge regarding their status in most West African countries is... -
Population change in the Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Trevor Hill --- School of Agricultural Earth and Environmental Sciences, Discipline of Geography, South Africa Etienne Nel --- College of Business and Economics, South AfricaIn common with arid and semi-arid areas worldwide, South Africa’s Karoo has experienced significant population shifts over the last 100 years. These have been caused by a range of considerations related to advances in farming technology and changing labour needs,... -
Seabird breeding populantions decrease along the arid coastline of South Africa’s Northern Cape province
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robert JM Crawford --- Branch Oceans and Coasts, Department of Environmental Affairs, South Africa Bruce M Dyer --- Branch Oceans and Coasts, Department of Environmental Affairs, South Africa Louise Geldenhuys --- Northern Cape Department of Environment and Nature Conservation, South Africa W Herman Oosthuizen --- Branch Oceans and Coasts, Department of Environmental Affairs, South Africa Azwianewi B Makhado --- Branch Oceans and Coasts, Department of Environmental Affairs, South AfricaNumbers of eight seabird species that have bred in coastal areas of South Africa’s arid Northern Cape province have all shown substantial decreases since initial estimates of their abundance were made in the latter part of the twentieth century. Likely... -
Evaluating parents for cane yield in sugarcane breeding using best linear unbiased prediction analysis of progeny data derived from family plots
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Ntombokulunga W Mbuma --- South African Sugarcane Research Institute, South Africa Marvellous Zhou --- South African Sugarcane Research Institute, South Africa Rouxlene van der Merwe --- Department of Plant Sciences, South AfricaThe success of sugarcane breeding is determined by the choice of parents, crosses made and progeny testing. The objectives of this study were to use best linear unbiased prediction (BLUP) to evaluate parents using progeny data obtained from family plots... -
High genetic diversity of Fusarium circinatum associated with the first outbreak of pitch canker on Pinus patula in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Felix F Fru --- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Emma T Steenkamp --- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Michael J Wingfield --- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), South Africa Jolanda Roux --- Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), South AfricaThe disease known as pitch canker results from infection of Pinus species by the fungus Fusarium circinatum. This fungus also causes a serious root disease of Pinus seedlings and cuttings in forestry nurseries. Pinus radiata and P. patula are especially... -
Minimum population size and distribution of Grey Crowned Cranes Balearica regulorum in Rwanda: an aerial and ground survey
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Olivier Nsengimana --- Rwanda Wildlife Conservation Association, Rwanda Matthew Becker --- International Crane Foundation/Endangered Wildlife Trust Partnership, South Africa Deo Ruhagazi --- Rwanda Wildlife Conservation Association, Rwanda Jean Ferus Niyomwungeri --- Rwanda Wildlife Conservation Association, RwandaThe iconic Grey Crowned Crane Balearica regulorum is facing an increase in threats to its wetland habitat and poaching for the captive trade market. This has resulted in an enduring long-term decline in population numbers, which led to the species... -
Spatial variation in meristic and morphometric characteristics of sardine Sardinops sagax around the coast of southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Groenewald --- Marine Research Institute and Department of Biological Sciences, South Africa CL Moloney --- Marine Research Institute and Department of Biological Sciences, South Africa CD van der Lingen --- Marine Research Institute and Department of Biological Sciences, South AfricaSpatial variability in phenotypic characteristics within a fish population may be used to infer the existence of multiple stocks, and knowledge of the population structure of exploited species is important for their sustainable management. In this study we investigated geographic... -
Abundance estimates of an isolated population of common bottlenose dolphins Tursiops truncatus in Walvis Bay, Namibia, 2008–2012
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SH Elwen --- Mammal Research Institute, University of Pretoria, South Africa RH Leeney --- Natural History Museum, United Kingdoms T Gridley --- Centre for Statistics in Ecology, Environment and Conservation, Department of Statistical Sciences,The coastal population of common bottlenose dolphins Tursiops truncatus found in Namibia is regionally isolated and unique. This population faces several potential anthropogenic threats, especially in Walvis Bay, including boat-based tourism, a commercial harbour undergoing expansion, and aquaculture for oysters... -
The attitudes of riparian communities to the presence of water hyacinth in the Wouri River Basin, Douala, Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SN Kenfack Voukeng --- Department of Zoology and Entomology, South Africa P Weyl --- Department of Zoology and Entomology, South Africa MP Hill --- Department of Zoology and Entomology, South Africa N Chi --- Watershed Task Group Coordinator (WTG), CameroonSince publication of the first record of Eichhornia crassipes in Cameroon in 1997, the weed has become highly invasive in the Wouri River Basin. Between June and September 2014, a socio-economic survey using participatory and qualitative methods was undertaken in... -
Analyses of mathematical models for city population dynamics under heterogeneity
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: O.C. Collins --- Institute of Systems Science, South Africa T.S. Simelane --- Institute of Systems Science, South Africa K.J. Duffy --- Institute of Systems Science, South AfricaIn this study, a mathematical model which takes heterogeneity into account is presented to describe city population dynamics. Initial insight is gained by qualitative analyses of a homogeneous version of this model. To understand the population dynamics of South African... -
Mathematical model showing how socioeconomic dynamics in African cities could widen or reduce inequality
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Obiora Cornelius Collins --- Institute of Systems Science, South Africa Thokozani Silas Simelane --- Institute of Systems Science, South Africa Kevin Jan Duffy --- Institute of Systems Science, South AfricaCities are important forces of national socioeconomic development. Individuals in cities often belong to different socioeconomic statuses depending on their levels of income, education and nature of occupation. Income, employment and education opportunities are among the main attractions of most... -
Genetic diversity and population structure of Brachiaria brizantha (A.Rich.) Stapf accessions from Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Asheber Tegegn --- Ethiopian Institute of Agricultural Research, Ethiopia Martina Kyalo --- Biosciences Eastern and Central Africa–International Livestock Research Institute (BecA-ILRI) Hub, Kenya Collins Mutai --- Biosciences Eastern and Central Africa–International Livestock Research Institute (BecA-ILRI) Hub, Kenya Jean Hanson --- International Livestock Research Institute, Ethiopia Getnet Asefa --- Ethiopian Institute of Agricultural Research, Ethiopia Appolinaire Djikeng --- Biosciences Eastern and Central Africa–International Livestock Research Institute (BecA-ILRI) Hub, Kenya Sita Ghimire --- Biosciences Eastern and Central Africa–International Livestock Research Institute (BecA-ILRI) Hub, KenyaBrachiaria is a tropical, warm-season grass native to Africa. It is an extensively cultivated forage in the tropics with proven benefits on livestock productivity. Brachiaria is well-known for high biomass production, animal nutrition, carbon sequestration, biological nitrification inhibition, soil conservation,... -
Population biology of the woodland dormouse Graphiurus murinus in a riverine Combretum forest, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Zimkitha JK Madikiza --- School of Animal, Plant and Environmental Sciences, South Africa Sandro Bertolino --- Department of Life Sciences and Systems Biology, Italy Emmanuel Do Linh San --- Department of Zoology and Entomology, South AfricaUntil recently, very little was known of the biology and ecology of the woodland dormouse Graphiurus murinus, a nocturnal and arboreal rodent belonging to the family Gliridae. Here, we aimed to increase our knowledge on its population biology in a... -
A qualitative approach to assess innovation in small infant industries within developing countries: The case of pharmaceuticals in Tunisia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nejla Yacoub --- Faculty of Economics and Management of Mahdia, Monastir, TunisiaEmpirical methodologies to assess innovation are generally econometric models using ‘quantifiable’ variables. However, the innovation system approach shows that innovation is a social process. Its analysis needs to consider the influence of humans on the innovation system actors’ behaviours and... -
Growth and mortality parameters of the black-chinned tilapia Sarotherodon melanotheron melanotheron (Pisces: Cichlidae) in a small lagoon in the Central Region of Ghana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GA Tibu --- Department of Fisheries and Aquatic Sciences, Ghana DW Aheto --- Department of Fisheries and Aquatic Sciences, Ghana J Blay --- Department of Fisheries and Aquatic Sciences, GhanaThis study quantified growth, mortality, and exploitation rate of the black-chinned tilapia (Sarotherodon melanotheron melanotheron) population in Etsir Lagoon, a small brackish waterbody at Abandze (5°11′ N, 1°5′ W) in the Central Region of Ghana for management of the stock... -
Geographic variation in West African Agama picticauda: insights from genetics, morphology and ecology
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Sneha Krishnan --- , USA 80526, 4257858934 Caleb Ofori-Boateng --- , , Ghana Matthew K Fujita --- , , USA Adam D Leaché --- , USAWest Africa is a region characterised by high species diversity and endemism, making it an ideal region to study the evolution of genetic and phenotypic differentiation. Species in this region often vary in morphology and genetics; however, the specific drivers... -
Tolerance to salinity and dehydration in the Sahara Desert blue-eyed turtle, Mauremys leprosa saharica (Testudines: Geoemydidae) from a brackish pond in the Lower Draa basin, southern Morocco
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Soumia Loulida --- , , Morocco Mohammed Znari --- , , Morocco Mohamed Naimi --- , , Morocco Safaa Bendami --- , , MoroccoThe marginal populations of the Sahara blue-eyed pond turtle, Mauremys leprosa saharica, in the southern-most species distribution range in the pre-Saharan areas of north-west Africa, are faced with extreme environmental conditions of arid climate and anthropogenic and climate change mediated... -
Genetic structure associated with habitat diversification supports the independent evolution of ecomorphs in Bradypodion pumilum
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Krystal A Tolley --- , South Africa Kevin P Hopkins --- , South Africa Jessica M da Silva --- , South AfricaThere are notable examples of repeated evolution of ecomorphs within groups of closely related species, these are typically viewed as remarkable cases of natural selection. In most cases, directional selection for certain phenotypic traits under specific (and differing) environmental conditions... -
Using mark-recapture methods to estimate population size and survival of pyjama sharks Poroderma africanum in Mossel Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP Grusd --- Department of Biological Sciences and the Marine Research Institute, South Africa CL Moloney --- Department of Biological Sciences and the Marine Research Institute, South Africa G Distiller --- Statistics in Ecology, Environment and Conservation (SEEC), Department of Statistical Sciences, South Africa RGA Watson --- Oceans Research, South Africa PD Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa E Gennari --- Oceans Research, South AfricaThe pyjama shark Poroderma africanum (family Scyliorhinidae) is endemic to coastal waters of South Africa but its population characteristics are poorly known. This study aims to estimate baseline demographic parameters for P. africanum in Mossel Bay. We applied mark-recapture methods... -
Assessment of genetic diversity among low-nitrogen-tolerant early generation maize inbred lines using SNP markers
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sam O Ajala --- International Institute of Tropical Agriculture, Nigeria Muyideen O Olayiwola --- International Institute of Tropical Agriculture, Nigeria Oluyinka J Ilesanmi --- International Institute of Tropical Agriculture, Nigeria Melaku Gedil --- International Institute of Tropical Agriculture, Nigeria Anthony O Job --- International Institute of Tropical Agriculture, Nigeria Amudalat B Olaniyan --- Department of Agronomy, NigeriaLow soil nitrogen (low-N) level is responsible for yield reduction in maize (Zea mays L.) fields in sub-Saharan Africa. A clear understanding of the genetic diversity among early generation inbred lines selected from various elite low-N- tolerant populations offers an... -
Ecology, conservation, and phylogenetic position of the Madagascar Jacana Actophilornis albinucha
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Josephine D’Urban Jackson --- Milner Centre for Evolution, Department of Biology and Biochemistry, United Kingdom Sama Zefania --- Institut d’Enseignement Supérieur de Menabe, Madagascar Sebastien Moehy --- Institut d’Enseignement Supérieur de Menabe, Madagascar Andrew J Bamford --- Wildfowl and Wetlands Trust, United Kingdom Michael W Bruford --- Organisms and Environment Division, School of Biosciences, United Kingdom Tamás Székely --- Milner Centre for Evolution, Department of Biology and Biochemistry, United KingdomThe Madagascar Jacana Actophilornis albinucha (Jacanidae) is an endemic shorebird found in the threatened wetlands of western Madagascar. This species is presumed to exhibit classical polyandry; however, few data are available to support that assumption. More generally, a lack of... -
The status and conservation of the Cape Gannet Morus capensis
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Richard B Sherley --- Environment and Sustainability Institute/Centre for Ecology and Conservation, United Kingdom Robert JM Crawford --- Department of Environment, Forestry and Fisheries (DEFF), South Africa Bruce M Dyer --- Department of Environment, Forestry and Fisheries (DEFF), South Africa Jessica Kemper --- African Penguin Conservation Project, Namibia Azwianewi B Makhado --- Department of Environment, Forestry and Fisheries (DEFF), South Africa Makhudu Masotla --- Department of Environment, Forestry and Fisheries (DEFF), South Africa Lorien Pichegru --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Pierre A Pistorius --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Jean-Paul Roux --- Ministry of Fisheries and Marine Resources, Namibia Peter G Ryan --- DST-NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology, Department of Biological Sciences, South Africa Desmond Tom --- Ministry of Fisheries and Marine Resources, Namibia Leshia Upfold --- Department of Environment, Forestry and Fisheries (DEFF), South Africa Henning Winker --- Department of Environment, Forestry and Fisheries (DEFF), South AfricaThe Cape Gannet Morus capensis is one of several seabird species endemic to the Benguela upwelling ecosystem (BUS) but whose population has recently decreased, leading to an unfavourable IUCN Red List assessment. Application of ‘JARA’ (‘Just Another Red-List Assessment,’ a... -
The first range-wide assessment of Saddle-billed Stork Ephippiorhynchus senegalensis distribution
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jonah Gula --- Department of Biology, United States Floyd Weckerly --- Department of Biology, United States KS Gopi Sundar --- International Crane Foundation, United StatesThe Saddle-billed Stork Ephippiorhynchus senegalensis exemplifies a case in conservation research in which a species is assessed as Least Concern on the IUCN Red List and the resulting consideration of low conservation priority has precluded proper scientific study. As a... -
Mangrove colonisation of the Mlalazi Estuary, South Africa: a response to artificial breaching
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RH Taylor --- Hydrology Department, South AfricaThe Mlalazi Estuary has 40 ha of mangroves, but before the 1930s there were none. The purpose of this study is to understand why this change occurred, and how the understanding thus gained can provide ecological information that will help... -
Genetic structure of bloodworm, Arenicola loveni (Annelida; Arenicolidae) suggests risk of local extinction in the face of overexploitation is lower than expected
Item type: Journal Article • Journal: African Zoology • Authors: CA Simon --- , South Africa J Kara --- , South Africa C Naidoo --- , South Africa CA Matthee --- , South AfricaThe bloodworm, Arenicola loveni, is commonly used as bait by fishers and may be vulnerable to local extinction owing to its K-selected life history strategies and overexploitation. Accurate population data that can inform management is, however, outdated, whereas demand for... -
The influence of host dispersal on the gene flow and genetic diversity of generalist and specialist ectoparasites
Item type: Journal Article • Journal: African Zoology • Authors: Conrad A Matthee --- , South AfricaThe dispersal and subsequent gene flow within parasite species is the result of a complex interaction between parasite life history, host life history and abiotic environmental factors. To gain more insights into the drivers responsible for parasite dispersal, COI mtDNA... -
Status and population structures of three anthelmintic tree species along climatic gradient in Benin and the implications for conservation
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Géorcelin G Alowanou --- , Bénin Thierry D Houéhanou --- , Bénin Sylvanus Mensah --- , Bénin Bénoit K Alissou --- , Bénin Carlos C Ahoyo --- , Bénin Rauldin S Akpako --- , Bénin Faroukou Wabi --- , Bénin Marcel RB Houinato --- , Bénin Sylvie M Hounzangbé-Adoté --- , BéninSmallholder farmers make intensive use of anthelmintic plant species in the traditional treatment of animal parasitic infections. As a result, populations of these plant species are exposed to increased disturbances such as plant harvesting, threatening their stability. Information on population... -
Trends in savannah waterbirds: protected area effect and influence of global threats on differing guilds
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tawanda Tarakini --- , Zimbabwe Peter Mundy --- , Zimbabwe Hervé Fritz --- , FranceUnderstanding species threats is underpinned by information on their population trends. We investigated the contribution of population drivers associated with 86 waterbird species’ trends at a local scale, Hwange National Park (HNP) and a national scale (Zimbabwe). We used logistic... -
Potential release sites and strategies for a Bearded Vulture Gypaetus barbatus reintroduction in South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Christiaan W Brink --- , South Africa Sonja Krüger --- , South Africa Arjun Amar --- , South AfricaThe southern African population of Bearded Vultures Gypaetus barbatus has declined rapidly and it is threatened with extinction. In response to this decline and the additional threats of wind farm developments in the core of the species’ range, it has... -
Trends in populations of Blue Crane Anthropoides paradiseus in agricultural landscapes of Western Cape, South Africa, as measured by road counts
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Donella J Young --- , South Africa James A Harrison --- , South AfricaPopulation trends of the Blue Crane Anthropoides paradiseus were monitored by volunteers participating in Coordinated Avifaunal Roadcounts (CAR) in the Overberg and Swartland agricultural regions of the Western Cape province from 1993 and 1996, respectively, until 2019 in the Overberg... -
Genetic diversity assessment of sorghum (Sorghum bicolor (L.) Moench) landraces using SNP markers
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Girma Mengistu --- , South Africa Hussein Shimelis --- , South Africa Mark Laing --- , South Africa Dagnachew Lule --- , South Africa Ermias Assefa --- , Ethiopia Isack Mathew --- , South AfricaSystematic genetic profiling of the genetic pool is fundamental to select desirable parents for conventional and genomic-assisted breeding. The objective of this study was to assess genetic variation and population structure in a diverse population of sorghum (Sorghum bicolor (L.)... -
Observations of Southern Ground-Hornbill Bucorvus leadbeateri groups in the Kafue National Park, Zambia
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jonah Gula --- , United States Chaona G Phiri --- , United KingdomZambia represents a core part of the Southern Ground-Hornbill’s Bucorvus leadbeateri distribution, yet empirical information on the country’s population is scant. From February to September 2017, ground-hornbill sightings were recorded in Kafue National Park in western Zambia to describe population... -
High genetic diversity and limited spatial structure in an endangered, endemic South African sparid, the red steenbras Petrus rupestris
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Gouws --- , South Africa SE Kerwath --- , South Africa WM Potts --- , South Africa NC James --- , South Africa NG Vine --- , South Africa PD Cowley --- , South AfricaThe red steenbras Petrus rupestris is endemic to South Africa, occurring from False Bay in the Western Cape Province to St Lucia in the province of KwaZulu-Natal. This species, the largest member of the family Sparidae, has undergone a substantial... -
Movements and growth rates of the broadnose sevengill shark Notorynchus cepedianus in southern Africa: results from a long-term cooperative tagging programme
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TM Engelbrecht --- , South Africa AA Kock --- , South Africa MJ O’Riain --- , South Africa BQ Mann --- , South Africa SW Dunlop --- , South Africa A Barnett --- , AustraliaTop predators are important components of healthy ecosystems but are at risk of overexploitation due to insufficient data on life-history characteristics and population dynamics to guide management. We investigated the movements and growth rates of the broadnose sevengill shark Notorynchus... -
How do HIV/AIDS policies address access to HIV services among men who have sex with men in Botswana?
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Kgosiekae Maxwell Matlapeng --- , South Africa Gbotemi Bukola Babatunde --- , South Africa Olagoke Akintola --- , South AfricaThe study assessed Botswana government policies related to HIV/AIDS and international policy documents that were adopted to address the HIV epidemic. Studies have indicated that HIV surveillance among men who have sex with men (MSM) is poor and that they... -
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,... -
Increasing numbers of a threatened insular population of the Common Raven Corvus corax
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Manuel Siverio --- , Spain Felipe Siverio --- , Spain Beneharo Rodríguez --- , SpainUntil the middle of the 20th century, the Common Raven Corvus corax was an abundant bird in the Canary Islands. However, during recent decades, populations have decreased dramatically in the most densely populated islands, apparently because of changes in land... -
Population and breeding patterns of the pest rodent: Mastomys natalensis in a maize dominated agroecosystem in Lake Victoria crescent zone, Eastern Uganda
Item type: Journal Article • Journal: African Zoology • Authors: Alex Mayamba --- , Uganda Robert Modest Byamungu --- , Tanzania Herwig Leirs --- , Belgium Isabirye Moses --- , Uganda Rhodes H Makundi --- , Tanzania Didas N Kimaro --- , Tanzania Apia W Massawe --- , Tanzania David Kifumba --- , Uganda Alice Nakiyemba --- , Uganda Mshaka E Mdangi --- , Tanzania Brian E Isabirye --- , Kenya Loth S Mulungu --- , TanzaniaMultimammate mice (Mastomys natalensis) are a key rodent pest species to cereal crop production in Sub-Saharan Africa. This study aimed at generating information on the population fluctuation and breeding patterns of M. natalensis in a maize dominated agro-ecosystem in the... -
When the flathead mullet left St Lucia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AK Whitfield --- , South AfricaThe St Lucia estuarine system on the east coast of South Africa is a declared World Heritage Site and Ramsar Site of International Importance. A major ecological feature of St Lucia during the last century was the annual spawning migration... -
A decade of surf-zone linefish monitoring in the Dwesa-Cwebe Marine Protected Area, with a preliminary assessment of the effects of rezoning and resource use
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Bullock --- , South Africa A Wood --- , South Africa VA Dames --- , South Africa JA Venter --- , South Africa J Greeff --- , South AfricaAn 11-year assessment of surf-zone linefish (marine fish captured on hook and line) was carried out in the Dwesa-Cwebe Marine Protected Area (MPA) in the Eastern Cape, South Africa, by research fishing to determine species and size composition, movement and... -
A review of the populations of tilapiine species in lakes Victoria and Naivasha, East Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Edwine Yongo --- , Kenya Laurent Cishahayo --- , Peoples Republic of China Eunice Mutethya --- , Kenya Bonface Mnang’at Alkamoi --- , Kenya Kokwon Costa --- , Kenya Nzeyimana Jean Bosco --- , Peoples Republic of ChinaThis paper discusses the catch trends, population attributes and biological characteristics of tilapiine species that are both native and that have been introduced into Lake Victoria and Lake Naivasha. Predation by Lates niloticus, species hybridisation, overfishing, pollution and eutrophication have... -
Traditional belief systems and trade in vulture parts are leading to the eradication of vultures in Nigeria: an ethno-ornithological study of north-central Nigeria
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Michael M Williams --- , Nigeria Ulf Ottosson --- , Nigeria Talatu Tende --- , Nigeria Justus P Deikumah --- , GhanaThe population of various species of vultures are declining rapidly across Africa, with noticeable declines in most areas including protected areas. This sudden decline of vultures in African countries, especially Nigeria, is quite alarming. One of the most common species... -
Genetic diversity of the Ankober Serin (Crithagra ankoberensis) at Simien Mountains National Park and Guassa Community Conservation Area, Ethiopia
Item type: Journal Article • Journal: African Zoology • Authors: Abebayehu Dessalegn --- , Ethiopia Mundanthra Balakrishnan --- , Ethiopia Till Töpfer --- , Germany Lars Podsiadlowski --- , Germany Tilaye Wube --- , EthiopiaThe genetic diversity of the Ethiopian endemic Ankober Serin Crithagra ankoberensis was studied in two populations at Simien Mountains National Park and Guassa Community Conservation Area using five microsatellite markers. Blood samples were taken from 16 and 14 birds, respectively... -
Long-term field study of the behaviour of Xenopus laevis (Pipidae) in a small dam
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Andreas Elepfandt --- Humboldt-Universität zu Berlin, Inst. Biologie, Germany Alexander Gutsche --- Humboldt-Universität zu Berlin, Inst. Biologie, Germany Werner J Fischer --- Universität Konstanz, Fak. Biologie, Germany Wera Leujak --- Humboldt-Universität zu Berlin, Inst. Biologie, Germany Phillip J Bishop --- University of the Witwatersrand, South AfricaA study of the behaviour of Xenopus laevis in a small dam in South Africa was continued annually from 1992 until 1999. All individuals were tagged. The annual number of frogs varied between 22 and 109 by migration. The sex... -
Trends in mussel cover, density and size at exploited and unexploited intertidal reefs in eastern South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Steyn --- , South Africa JC Groeneveld --- , South Africa J Santos --- , Norway XI Mselegu --- , South AfricaThe brown mussel Perna perna is the dominant indigenous mussel along the east coast of South Africa, where it is harvested by recreational and subsistence fishers. High fishing pressure near urban areas led to declining abundance and consequently to the... -
Movement patterns and catch trends of the diamond ray Gymnura natalensis (Dasyatidae) in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Daly --- , South Africa GL Jordaan --- , South Africa D Parker --- , South Africa G Cliff --- , South Africa N Nkabi --- , South Africa R Kyle --- , South Africa ST Fennessy --- , South Africa BQ Mann --- , South AfricaThe diamond ray Gymnura natalensis is endemic to southern Africa where its preference for shallow coastal habitats makes it vulnerable to recreational shore-based angling. Although it makes up approximately 1% of the shore-based tag numbers, little is known about its... -
Preliminary assessment of the population status and diurnal activity pattern of common bushbuck (Tragelaphus scriptus decula Rüppell, 1835) in Maze National Park, Ethiopia
Item type: Journal Article • Journal: African Zoology • Authors: Eshetu Esatu --- , Ethiopia Abebayehu Desalegn Hailemariam --- , EthiopiaThe common bushbuck (Tragelaphus scriptus decula) is a widely distributed antelope species in Africa that utilises a variety of habitat types. A study was conducted on the population status and diurnal activity pattern of T. s. decula in Maze National... -
Assessments of range-wide distribution of six African storks and their relationships with protected areas
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jonah Gula --- , USA M Clay Green --- , USA Sarah Fritts --- , USA W Richard J Dean --- , South Africa KS Gopi Sundar --- , IndiaSpecies range maps provided by the IUCN and BirdLife International are recognised to sometimes mischaracterise distribution and have resulted in inaccurate status assessments. In this study we assessed distribution trends and relationships with protected area extent for six African storks,... -
Monitoring an isolated population of Cape Parrots Poicephalus robustus in the Limpopo province, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kate F Carstens --- , South Africa Kirsten Wimberger --- , South Africa Rowan Martin --- , United Kingdom David Letsoalo --- , South Africa Craig T Symes --- , South AfricaCape Parrots Poicephalus robustus inhabit forest patches in South Africa with <1 800 individuals remain in the wild. A small, genetically isolated population occurs in the northern part of its range in the Limpopo province. There, annual counts indicated ∼100... -
Factors associated with poor access to HIV and sexual and reproductive health services in Nigeria for women and girls living with HIV during the COVID-19 pandemic
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Morenike Oluwatoyin Folayan --- Obafemi Awolowo University, Nigeria Olujide Arije --- Institute of Public Health, College of Health Sciences, Obafemi Awolowo University, Nigeria Amaka Enemo --- , Nigeria Aaron Sunday --- , Nigeria Amira Muhammad --- Northern Nigerian Transgender Initiative, Nigeria Hasiya yunusa Nyako --- , Nigeria Rilwan Mohammed Abdullah --- , Nigeria Henry Okiwu --- , Nigeria Veronica Akwenabuaye Undelikwo --- University of Calabar, Nigeria Pamela Adaobi Ogbozor --- Enugu State University of Science and Technology, Nigeria Oluwaranmilowo Amusan --- , Nigeria Oluwatoyin Adedoyin Alaba --- Indiana University of Pennsylvania, USA Erik Lamontagne --- , SwitzerlandAim: To determine the proportion of women and girls living with HIV (WGLHIV) who had poor access to HIV, tuberculosis and sexual and reproductive health (SRH) services in Nigeria during the COVID-19 pandemic and associated factors. -
Acceptability and accessibility of HIV testing and treatment among men who have sex with men in Botswana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Kgosiekae Maxwell Matlapeng --- , South Africa Gbotemi Bukola Babatunde --- , South Africa Olagoke Akintola --- , South AfricaBackground: Although HIV testing and treatment are the cornerstones of a comprehensive prevention strategy, their acceptability and accessibility are complex within the healthcare system. -
An assessment of the medium-term reproductive success of an extralimital white rhinoceros population
Item type: Journal Article • Journal: African Zoology • Authors: Anja Truter --- , South Africa Nokubonga Mgqatsa --- , South Africa Daniel M Parker --- , South AfricaThe white rhinoceros (Ceratotherium simum) is threatened primarily due to continued poaching for its horns. In South Africa, partly to promote the conservation of the species, white rhinos have been introduced into areas where they did not occur historically (i.e... -
Distribution and breeding numbers of a recently split species, the West African Crested Tern Thalasseus albididorsalis
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Jan Veen --- Wenum-Wiesel, The Netherlands Ahmed Amarejeyat --- Scientific Institute, Mohammed V University, Morocco Mohamed Aziz el Agbani --- Scientific Institute, Mohammed V University, Morocco Mohamed Camara --- Banc d'Arguin National Park, Mauritania Hanneke Dallmeijer --- Wenum-Wiesel, The Netherlands Yelli Diawara --- Banc d'Arguin National Park, Mauritania Moussa Sega Diop --- , Senegal Abdou Diouf --- , Senegal Eelke Folmer --- , The Netherlands Nicolas Gomis --- , Senegal Valentin Mansali --- , Senegal Hamilton Monteira --- , Guinea Bissau Moussa Samb --- , Senegal Lamin Manneh --- , The Gambia Effoleming Manga --- , Senegal Thor Veen --- Quest University Canada, Canada Wim C Mullié --- , SenegalThis study investigated the distribution, numbers and conservation threats of the West African Crested Tern, which was recently elevated to full species after it was split from the Royal Tern with an American and African subspecies. In the period 1998–2019,... -
The African Bird Atlas Project: a description of the project and BirdMap data-collection protocol
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Michael Brooks --- University of Cape Town, South Africa Sanjo Rose --- University of Cape Town, South Africa Res Altwegg --- University of Cape Town, South Africa Alan TK Lee --- University of Cape Town, South Africa Henk Nel --- , South Africa Ulf Ottosson --- A.P. Leventis Ornithological Research Institute, Nigeria Ernst Retief --- , South Africa Chevonne Reynolds --- University of the Witwatersrand, South Africa Peter G Ryan --- University of Cape Town, South Africa Sidney Shema --- , Kenya Talatu Tende --- A.P. Leventis Ornithological Research Institute, Nigeria Les G Underhill --- University of Cape Town, South Africa Robert L Thomson --- University of Cape Town, South AfricaThe African Bird Atlas Project (ABAP) is a citizen-science bird-monitoring programme that relies on a robust, repeatable protocol (BirdMap) and allows insights into the distributions of African birds and their conservation. The protocol involves collecting bird lists within spatial sampling... -
Impact of COVID-19 public health responses on income, food security and health services among key and vulnerable women in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Hilton Humphries --- University of KwaZulu-Natal, South Africa Lara Lewis --- University of KwaZulu-Natal, South Africa Erik Lamontagne --- , Switzerland Shakira Choonara --- University of KwaZulu-Natal, South Africa Keabetswe Dikgale --- University of KwaZulu-Natal, South Africa Anna Yakusik --- , Switzerland Dianne Massawe --- , South Africa Ntombenhle Mkhize --- , South Africa Farai Mzungu --- , South Africa Quarraisha Abdool Karim --- University of KwaZulu-Natal, South AfricaGlobally, COVID-19 has impacted lives and livelihoods. Women living with HIV and/or at high risk of acquiring HIV are socially and economically vulnerable. Less is known of the impact of COVID-19 public health responses on women from key and vulnerable... -
Prevention of HIV and other STIs in rural Senegal: a study of prevention-related events collected by sentinel observers
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Abdoulaye Sidibé Wade --- Division SIDA, Senegalese Ministry of Health, Catherine Enel [B0002] Emmanuel Lagarde --- French National Institute for Health research (INSERM),We conducted a study of AIDS/STI prevention-related events based on a network of sentinel observers over a 35-month period in three rural communities of Senegal (May 2000 – March 2003). In one of these communities we also conducted a population-based... -
Demand for programs for key populations in Africa from countries receiving international donor assistance
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Owen Ryan [d181e18] John Macom Michelle Moses-EisensteinThere has been increasing attention in recent years to the HIV prevention, treatment, and care needs of key populations in Africa, in particular men who have sex with men (MSM), injection drug users (IDU), and female sex workers (FSW). While... -
Understanding culture and HIV/AIDS in sub-Saharan Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Steven Sovran [d378e18]Early in the study of HIV/AIDS, culture was invoked to explain differences in the disease patterns between sub-Saharan Africa and Western countries. Unfortunately, in an attempt to explain the statistics, many of the presumed risk factors were impugned in the... -
Third-world realities in a first-world setting: A study of the HIV/AIDS-related conditions and risk behaviors of sex trade workers in Saskatoon, Saskatchewan, Canada
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Yelena Bird --- at the , Canada Mark Lemstra --- at the , Canada Marla Rogers --- at the , Canada John Moraros --- at the , CanadaThe transmission and prevalence of Human Immunodeficiency Virus (HIV) among those employed as sex trade workers (STW) is a major public health concern. The present study describes the self-reported responses of 340 STW, at-risk for contracting HIV. The participants were... -
Policy-maker attitudes to the ageing of the HIV cohort in Botswana
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Kabo Matlho --- , , Australia Refelwetswe Lebelonyane --- , Botswana Tim Driscoll --- , , Australia Joel Negin --- , , AustraliaBackground: The roll out of antiretroviral therapy in Botswana, as in many countries with near universal access to treatment, has transformed HIV into a complex yet manageable chronic condition and has led to the emergence of a population aging with... -
Factors associated with high HIV-related stigma among commuter populations in Johannesburg, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Peter S. Nyasulu --- Stellenbosch University, South Africa Ndumiso Tshuma --- Orange Grove, South Africa Lovemore N. Sigwadhi --- Stellenbosch University, South Africa Juliet Nyasulu --- University of the Witwatersrand, South Africa Modupe Ogunrombi --- Department of Clinical Pharmacology, School of Medicine, Sefako Makgatho Health Science University, South Africa Lucy Chimoyi --- The Aurum Institute, South AfricaStigma remains an important barrier to seeking and staying in care among individuals infected with Human Immunodeficiency Virus (HIV). Despite continued widespread information, education and communication campaigns to raise awareness about the infection. The aim of the study was to... -
Inter‐island variation and taxonomy of Seychelles Trachylepis
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Justin Gerlach --- University Museum of Zoology Cambridge, U.K.Skinks of the genus Trachylepis are geographically widespread and diverse. In the Seychelles islands two species are present, T. sechellensis and T. wrightii. All island populations of these two species were studied in 2000–2003 and the morphology of the populations... -
Population structure of the African Clawed Frog (Xenopus laevis) in maize‐growing areas with atrazine application versus non‐maize‐growing areas in South Africa
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: LouisH. Du Preez --- North‐West University, South Africa KeithR. Solomon --- University of Guelph, Canada JimA. Carr --- Texas Tech University, JohnP. Giesy --- Michigan State University, USA TimothyS. Gross --- Florida Caribbean Science Center‐USGS‐BRD, USA RonaldJ. Kendall --- Texas Tech University, USA ErnestE. Smith --- Texas Tech University, USA GlenL. Van der Kraak --- University of Guelph, Canada Ché Weldon --- North‐West University, South AfricaThe herbicide atrazine has been suggested to cause gonadal deformities in frogs and could possibly impact on reproduction. Since the early 1960s, atrazine has been used in large amounts in maize production areas of South Africa. These areas overlap with... -
Small, specialised and highly mobile? The tree-hole breeding frog, Phrynobatrachus guineensis, lacks fine-scale population structure
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Laura Sandberger --- Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, Germany Heike Feldhaar --- University of Osnabrück, Germany KathrinP. Lampert --- University of Bochum, Germany DunjaK. Lamatsch --- Austrian Academy of Sciences and Institute for Limnology, Austria Mark-Oliver Rödel --- Leibniz Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, GermanyData on population dynamics and distribution are of primary interest to biologists because they reveal information about the species' ecology and evolution and are thus essential for conservation efforts. Patchily distributed species are especially interesting for conservation studies, because of... -
Temporal changes in allelic variation among Cape Dwarf Chameleons, Bradypodion pumilum, inhabiting a transformed, semi-urban wetland
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Eric M. Katz --- , , South Africa Krystal A. Tolley --- , , South Africa Jacqueline M. Bishop --- , , South AfricaThe Cape Dwarf Chameleon, Bradypodion pumilum, is threatened by extensive habitat loss and transformation in the Western Cape Province of South Africa. As a result, the species exists as a collection of populations inhabiting an increasingly fragmented landscape within a... -
A photo-identification-based assessment model of southern right whales Eubalaena australis surveyed in South African waters, with a focus on recent low counts of mothers with calves
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Brandão --- University of Cape Town, South Africa A Ross-Gillespie --- University of Cape Town, South Africa E Vermeulen --- University of Pretoria, South Africa DS Butterworth --- University of Cape Town, South AfricaPhoto-identification data for southern right whale cow–calf pairs on the South African calving grounds provide one of the longest abundance time-series for any whale population worldwide. Following a very steady increase from a heavily depleted state, surveys since 2015 reflect... -
Effect of land use/land cover changes on water quality in the Upper Athi River sub-catchment in Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Margaret Waturu --- The Technical University of Kenya, Kenya Lewis Sitoki --- The Technical University of Kenya, Kenya Joseph Lalah --- The Technical University of Kenya, Kenya Stanley Chasia --- The Technical University of Kenya, Kenya Evance Mbao --- The Technical University of Kenya, KenyaThe unprecedented pollution of Athi River has negatively impacted the downstream communities who depend on the river's waters. Moreover, the Upper Athi River Catchment has recently experienced an increase in human population coupled with rapid industrialisation, which has led to... -
Assessment of genetic and morphological differentiation among populations of the Diederik Cuckoo Chrysococcyx caprius
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Rae M Smith --- South African National Biodiversity Institute (SANBI), South Africa Desiré L Dalton --- South African National Biodiversity Institute (SANBI), South Africa Monica Mwale --- South African National Biodiversity Institute (SANBI), South Africa Lisa J Nupen --- South African National Biodiversity Institute (SANBI), South Africa Chantelle Pretorius --- South African National Biodiversity Institute (SANBI), South Africa Jamie Bojko --- Teesside University, United Kingdom Kim Labuschagne --- South African National Biodiversity Institute (SANBI), South Africa Isa-Rita M Russo --- Cardiff University, United Kingdom Samuel T Osinubi --- FitzPatrick Institute of African Ornithology, University of Cape Town, South AfricaThe Diederik Cuckoo Chrysococcyx caprius is an African species widely distributed south of the Sahara, which migrates seasonally between breeding and nonbreeding sites. It is currently unknown whether the species consists of a single panmictic population or if it is... -
Status and density of the threatened Kori Bustard Ardeotis kori in a woodland savanna
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kathan Bandyopadhyay --- University of Wyoming, United States Bogdan Cristescu --- , Namibia Jeffrey L Beck --- University of Wyoming, United States John L Koprowski --- University of Wyoming, United States Laurie Marker --- , NamibiaMany grassland habitats have disappeared or undergone substantial change worldwide and many obligatory grassland animal species have populations that are at risk of extinction. The Kori Bustard Ardeotis kori is the largest flying bird native to Africa and an open... -
The avifauna of Niokolo-Koba National Park, Senegal: a review of historical and recent ornithological records
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: John B Rose --- , France Oliver JL Fox --- , The Gambia Bram Piot --- , Laos Philippe Delaporte --- , FranceWe present the results of a review of the bird species historically observed in Niokolo-Koba National Park, a World Heritage Site and 913 000 ha natural protected area in southeastern Senegal. In carrying out this work we consulted both formal... -
PrEP retention predictors among key populations in urban areas of Zimbabwe — a machine learning approach
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Bridgette Bero --- National University of Science and Technology, Zimbabwe Chipo Zidana --- Botswana International University of Science and Technology, Botswana Sarudzai Portia Showa --- National University of Science and Technology, ZimbabwePre-exposure prophylaxis (PrEP) success depends on adherence and hence retention in care. It is vital to find factors that affect PrEP retention to make this HIV-prevention method successful. The main objectives of this study were to identify the major determinants... -
Population status, distribution and seasonal range of Grevy’s zebra (Equus grevyi) in a protected savannah area
Item type: Journal Article • Journal: African Zoology • Authors: --- Samara University, Ethiopia --- Addis Ababa University, Ethiopia --- Addis Ababa University, EthiopiaThe genus Equus comprises six species and 22 subspecies. Ethiopia is the only country in the world that has all three surviving species of zebra. The population status, structure, and seasonal range of Grevy’s zebra (Equus grevyi) were studied in... -
Eelgrass Zostera capensis populations in KwaZulu-Natal, South Africa, harbour distinct genomic signals despite limited geographical distance
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SE Smit --- Stellenbosch University, South Africa R Henriques --- University of Pretoria, South Africa M Jackson --- Stellenbosch University, South Africa R Taylor --- , South Africa L Vivier --- University of Zululand, South Africa S von der Heyden --- Stellenbosch University, South AfricaSeagrasses are threatened by anthropogenic stressors and climate change, with numerous population declines reported. In South Africa, the eelgrass Zostera capensis is restricted to estuarine environments and has a disjunct distribution and declining status. With the majority of the distribution... -
Biology and ecology of the African blackspot shark Carcharhinus humani on the east coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Cliff --- KwaZulu-Natal Sharks Board, South Africa NG Booyens --- School of Life Sciences, University of KwaZulu-Natal, South Africa R Daly --- Oceanographic Research Institute (ORI), South Africa GL Jordaan --- Oceanographic Research Institute (ORI), South Africa N Nkabi --- KwaZulu-Natal Sharks Board, South Africa D Parker --- Commonwealth Scientific and Industrial Research Organization, Australia BQ Mann --- Oceanographic Research Institute (ORI), South AfricaThe African blackspot shark Carcharhinus humani (until now commonly known as Human’s whaler shark) is a small-sized requiem shark (family Carcharhinidae) found in tropical coastal waters of the western Indian Ocean as far south as Port St Johns on the... -
New distribution records and population density of the Critically Endangered Tarzan Chameleon (Calumma tarzan), eastern Madagascar
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Alain JV Rakotondrina --- Madagasikara Voakajy, Madagascar Raphali R Andriantsimanarilafy --- Madagasikara Voakajy, Madagascar Hanta J Razafimanahaka --- Madagasikara Voakajy, Madagascar Achille P Raselimanana --- , Madagascar Rikki Gumbs --- Zoological Society of London, United Kingdom Caleb Ofori-Boateng --- Zoological Society of London, United Kingdom Jody M Taft --- South African National Biodiversity Institute, Kirstenbosch Research Centre, South Africa Fanomezana M Ratsoavina --- Université d’Antananarivo, MadagascarThe distribution and population density of the Critically Endangered Tarzan Chameleon (Calumma tarzan) in eastern humid forests of Madagascar was studied using line transect-distance sampling. Based on the results from species distribution models, eight sites were visited over a four-month... -
Confirmed cases of Rüppell’s Vulture Gyps rueppelli breeding in Senegal: advocating systematic sampling to reassess the conservation status of the species in West Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Antonio-Román Muñoz --- Universidad de Málaga, Spain Juan Ramírez --- Universidad de Málaga, Spain Marina Guerrero --- Universidad de Málaga, Spain Francisco María Zufiaur --- , SpainVulture populations are declining across Africa and the conservation status of Rüppell’s Vulture Gyps rueppelli has changed from Near Threatened in 2007 to Critically Endangered in 2015. Its global population was estimated at 30 000 individuals in the early 1990s... -
Fermentation characteristics of maize–forage legume mixtures ensiled in small-scale silos
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: PE Mosebi --- University of Pretoria, South Africa IC Madakadze --- University of Pretoria, South Africa MP Ntakatsane --- National University of Lesotho, Lesotho R Ratsele --- , LesothoThis study was conducted to evaluate the ensiling characteristics of maize–forage legume mixtures in small-scale silos. Sole and intercrops forage materials were harvested 80 days after planting and ensiled in small-scale silos, that is: plastic bags, plastic drums, and small... -
Phylogeographic structuring in a widespread southern African grass snake (Psammophiinae: Psammophylax rhombeatus)
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: C. Keates --- Rhodes University, South Africa W. Conradie --- Port Elizabeth Museum (Bayworld), South Africa S. Edwards --- Rhodes University, South AfricaThe structural and environmental heterogeneity within southern Africa has given rise to many morphological forms of Psammophylax rhombeatus distributed throughout the country, with previous studies neglecting the associated molecular significance of these forms. The species’ widespread, generalist ecology coupled with... -
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 use of image classification to estimate flamingo abundance from aerial, drone and satellite imagery
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: RB Colyn --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, South Africa TA Anderson --- BirdLife South Africa, South Africa MD Anderson --- BirdLife South Africa, South Africa EF Retief --- BirdLife South Africa, South Africa EJ Van der Westhuizen-Coetzer --- , South Africa H Smit-Robinson --- BirdLife South Africa, South AfricaThe Lesser Flamingo Phoeniconaias minor is a Near Threatened species known to be highly gregarious and that can concentrate in large numbers at core foraging and breeding sites, yet is also known to disperse widely in search of suitable foraging... -
The African Penguin Spheniscus demersus should be considered Critically Endangered
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Richard B Sherley --- Environment and Sustainability Institute/Centre for Ecology and Conservation, University of Exeter, United Kingdom Azwianewi B Makhado --- , South Africa Robert JM Crawford --- , South Africa Christina Hagen --- , South Africa Jessica Kemper --- , Namibia Katrin Ludynia --- University of the Western Cape, South Africa Makhudu J Masotla --- , South Africa Alistair McInnes --- , South Africa Lorien Pichegru --- Institute for Coastal and Marine Research, Nelson Mandela University, South Africa Desmond Tom --- , Namibia Leshia Upfold --- , South Africa Lauren J Waller --- University of the Western Cape, South AfricaThe African Penguin Spheniscus demersus has been considered a threatened species since 1984 and, aside from a short period around 2000, its population has been in constant decline since at least the 1950s. By combining counts of the numbers of... -
Population trends of the Cape Parrot Poicephalus robustus in the Amatholes, Eastern Cape: trialling ground-based flock photography for demographic and health assessment
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Clare J Padfield --- , South Africa Kate F Carstens --- , South Africa Johann C Carstens --- , South Africa Francis R Brooke --- , South Africa Kirsten Wimberger --- , South AfricaGlobally, 60% of species in the order Psittaciformes are experiencing population declines. Understanding demographic and health trends in populations is vital for the prioritisation of limited conservation resources. The Cape Parrot Poicephalus robustus is a South African endemic forest species... -
Genome-wide genetic-marker variation uncovers potential stock structuring of oceanic tuna (skipjack) and coastal tuna (kawakawa) within the western Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: FA Mzingirwa --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya NJ McKeown --- Aberystwyth University, United Kingdom GM Okemwa --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya WHH Sauer --- Rhodes University, South Africa JS Halafo --- Instituto Oceanográfico de Moçambique (InOM), Mozambique JG Mshana --- Sokoine University of Agriculture, Tanzania JN Kamau --- Kenya Marine and Fisheries Research Institute (KMFRI), Kenya PW Shaw --- Rhodes University, South AfricaTuna and tuna-like species are highly mobile and migratory, and therefore assumed to have single highly connected populations over large ocean regions. However, empirical data on the genetic population structure of such species in the western Indian Ocean (WIO) remain... -
Littoral substrates and nest properties of Coptodon rendalli vary with distance from the shoreline in a tropical impoundment, southeast Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RJ Chateya --- National University of Science and Technology, Zimbabwe HGT Ndagurwa --- National University of Science and Technology, ZimbabweThe change in littoral substrates and Coptodon rendalli nest properties along the inshore–offshore gradient of Mushandike Dam in southeast Zimbabwe, impacted by long-term water-level fluctuations, were studied in March 2016. Substrate and nest properties were measured in four contiguous 25... -
Trends and population size of White-necked Rockfowl Picathartes gymnocephalus within the Nyamibe Bepo Forest Reserve in Ghana
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Joseph Kwasi Afrifa --- Ghana Wildlife Society, Accra Conservation Education Centre, Ghana Ernestina Ahema --- Ghana Wildlife Society, Accra Conservation Education Centre, Ghana Winston Kanyi --- Ghana Wildlife Society, Accra Conservation Education Centre, Ghana Gideon Nyamekye Osei --- Ghana Wildlife Society, Accra Conservation Education Centre, Ghana Darkwah Yaw Amoateng --- Ghana Wildlife Society, Accra Conservation Education Centre, Ghana Augustus Asamoah --- Proforest Africa Regional Office, GhanaThe White-necked Rockfowl Picathartes gymnocephalus (family Picathartidae) is endemic to the Upper Guinea forest and has a global population of <10 000 mature individuals. This species is listed as Vulnerable on the IUCN Red List owing to its declining population,... -
Evolution, population structure and morphology of the African Black Duck Anas sparsa and Yellow-billed Duck A. undulata
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Philip Lavretsky --- University of Texas at El Paso, United States Ramsey Russell --- , United States Sara Gonzalez --- University of Texas at El Paso, United States Vergie M Musni --- University of Texas at El Paso, United States Alexis Díaz --- Centro de Ornitología y Biodiversidad (CORBIDI), Peru Joshua I Brown --- University of Texas at El Paso, United StatesBiological conservation requires a fundamental understanding of evolutionary history and established contemporary population genetics. Here, we sequenced mitochondrial DNA (mtDNA) and thousands of nuclear loci across individuals of the African Black Duck Anas sparsa and Yellow-billed Duck A. undulata to... -
Intrapopulation isotopic niche structure in mammalian carnivores and herbivores across contrasting habitats
Item type: Journal Article • Journal: African Zoology • Authors: Chanel Lewis --- University of the Free State, South Africa Runè van der Merwe --- University of the Free State, South Africa Chabi AMS Djagoun --- University of Abomey-Calavi, Benin Etotépé A Sogbohossou --- University of Abomey-Calavi, Benin Daryl Codron --- University of the Free State, South AfricaNatural communities exhibit ecological gradients that result in a variety of competitive interactions and variations in niche patterns. Changes in resource availability affect the size of a species’ niche: it expands when a variety of resources are abundant and contracts... -
Surveys of Sooty Falcons Falco concolor wintering in Madagascar in 2023 and 2024
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Gilbert Razafimanjato --- , Madagascar Michael J McGrady --- International Avian Research, Austria Radoniaina Razafiherison --- , Madagascar Heritiana J Randriamanantena --- , Madagascar Marius PH Rakotondratsima --- , Madagascar Idéaly J Dinafitiavana --- , Madagascar Russell Thorstrom --- World Center for Birds of Prey, United States Lily-Arison Rene de Roland --- , MadagascarMadagascar is the non-breeding-season destination for a significant proportion of the global population of the migratory and Vulnerable Sooty Falcon Falco concolor. Here, we report on surveys of wintering birds in Madagascar, conducted in 2023 and 2024 over a total... -
High population differentiation of Okpe River Talbotiella gentii at Anum Boso, Ghana, uncovered by RAPD
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Daniel Dompreh --- Kwame Nkrumah University of Science and Technology, Ghana Adam Price --- University of Aberdeen, UK Michael David Swaine --- University of Aberdeen, UKTalbotiella gentii Hutch. & Greenway is an endemic, severely threatened and fragmented species in Ghana. Though it is a highly valued non-timber product, it faces the threat of extinction from wildfire, and exploitation for charcoal and fuelwood, agriculture and building... -
Breeding population status and nesting preferences of the White-backed Vulture Gyps africanus in western Serengeti, northern Tanzania
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Vainess Laizer --- Department of Wildlife Management, College of Forestry, Wildlife and Tourism, Sokoine University of Agriculture, Tanzania Peter S Goodman --- Grumeti Fund, Tanzania Noel Mbise --- Grumeti Fund, Tanzania Claire Bracebridge --- The Peregrine Fund, The World Center for Birds of Prey, United States Kate Tiedeman --- Max Planck Institute for Animal Behavior, Germany Corrine J Kendall --- The Peregrine Fund, The World Center for Birds of Prey, United States Robert Byamungu --- Department of Wildlife Management, College of Forestry, Wildlife and Tourism, Sokoine University of Agriculture, Tanzania Shombe N Hassan --- Department of Wildlife Management, College of Forestry, Wildlife and Tourism, Sokoine University of Agriculture, Tanzania Kristen D Snyder --- Grumeti Fund, TanzaniaThe White-backed Vulture Gyps africanus is Critically Endangered because of its decline across its range in Africa, largely due to poisoning. The western corridor of the Serengeti ecosystem in northern Tanzania hosts a significant number of individuals of this species... -
Reduced Blue Crane Grus paradisea breeding productivity in intensive agricultural landscapes
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Christie A Craig --- FitzPatrick Institute of African Ornithology, Department of Biological Sciences, University of Cape Town, South Africa Bradley K Gibbons --- African Crane Conservation Programme, Endangered Wildlife Trust/International Crane Foundation, South Africa Tanya Smith --- African Crane Conservation Programme, Endangered Wildlife Trust/International Crane Foundation, South Africa Glenn I Ramke --- African Crane Conservation Programme, Endangered Wildlife Trust/International Crane Foundation, South Africa Peter G Ryan --- FitzPatrick Institute of African Ornithology, Department of Biological Sciences, University of Cape Town, South AfricaWe compare Blue Crane Grus paradisea breeding productivity in the Western Cape wheatlands in Overberg and Swartland (2018–2021), Karoo (2009–2011) and eastern grasslands (2009–2011 and 2013). Productivity was higher in the grasslands (0.95 fledglings/attempt, 95% CI = 0.86–1.30, n =... -
Spatiotemporal shape variation in sagittal otoliths of spotted grunter Pomadasys commersonnii in South African estuaries
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: V Coetzee --- Department of Biological Sciences, University of Cape Town, South Africa S Kerwath --- Department of Biological Sciences, University of Cape Town, South Africa S Lamberth --- Department of Forestry, Fisheries and the Environment (DFFE), South Africa D Parker --- Department of Biological Sciences, University of Cape Town, South AfricaThe morphological structure of fish otoliths is under dual regulation by genetic and environmental factors, and has been successfully used to aid stock delineation. This study examined whether differences in sagittal otolith shape outlines could be used to delineate potential...
