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Catch-and-effort estimates for the gillnet and beach-seine fisheries in the Western Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: K. Hutchings S. J. LamberthTotal catch and effort for the inshore net-fisheries in the Western Cape, South Africa, were estimated by means of face-to-face questionnaire, telephone and access point surveys, analysis of factory records and compulsory catch returns. In most areas, gillnet fishing effort... -
Bycatch in the gillnet and beach-seine fisheries in the Western Cape, South Africa, with implications for management
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: K. Hutchings S. J. LamberthInterview questionnaires and access point surveys were conducted in order to describe and quantify the catch composition of the inshore net-fisheries in the Western Cape, South Africa. A total of 138 562 fish, representing 29 species from 20 families, was... -
Socio-economic characteristics of gillnet and beach-seine fishers in the Western Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: K. Hutchings S. J. Lamberth J. K. TurpieData collected by questionnaire and telephone surveys conducted during 1998 and 1999 are used to describe the socio-economic characteristics of inshore netfishers in the Western Cape. Approximately two-thirds of netfishers work or have worked in other fishing sectors and a... -
ASPECTS OF THE FISHERIES OF LAKE LIAMBEZI, CAPRIVI
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: B. C.W. van der Waal --- Department of Co-operation and Development, South AfricaLake Liambezi, situated in the Linyanti Swamp, Caprivi, is inhabited by 43 fish species. Population estimates with seine nets, rotenone and explosives gave values of 74 to 157 kg ha−1. The composition of seine net catches differed markedly from gill... -
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... -
Towards the development of a macroinvertebrate sampling technique for palustrine wetlands in South Africa: a pilot investigation in the KwaZuluNatal midlands
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Rebecca Bowd DonovanC Kotze CraigD Morris NevilW QuinnA study was undertaken in November 2003 to derive a suitable sampling technique for collecting a representative sample of aquatic macroinvertebrates from a selected emergent vegetation biotope in a palustrine wetland, Melmoth Vlei, KwaZulu-Natal, South Africa. The aim was to... -
A study of the ichthyofauna of a small tropical reservoir, south-eastern lowveld, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Dalu --- Department of Biological Sciences, Zimbabwe BW Clegg --- Malilangwe Wildlife Reserve, Zimbabwe T Nhiwatiwa --- Department of Biological Sciences, ZimbabweFish diversity in Malilangwe Reservoir in the south-eastern lowveld of Zimbabwe was investigated in 2011 to determine the community structure. The aim of this study was to determine the current status of an artificial fish community in a small reservoir... -
Sharks caught in the protective gill nets off KwaZulu-Natal, South Africa. 10. The dusky shark Carcharhinus obscurus (Lesueur 1818)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SFJ Dudley G Cliff MP Zungu MJ SmaleBetween 1978 and 1999, a total of 5 626 dusky sharks Carcharhinus obscurus, constituting 20% of the total shark catch, was caught in the protective nets off KwaZulu-Natal, South Africa. The mean annual catch was 256 sharks (SD = 107.5,... -
Sharks caught in the protective gill nets off KwaZulu-Natal, South Africa. 11. The scalloped hammerhead shark Sphyrna lewini (Griffith and Smith)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: P de Bruyn SFJ Dudley G Cliff MJ SmaleBetween 1978 and 1998, a total of 3 385 scalloped hammerhead sharks Sphyrna lewini was caught in the protective nets off KwaZulu-Natal. The mean annual catch was 166 sharks (range 60–279). There was a significant decrease in catch rate with... -
Sharks caught in the protective gill nets off KwaZulu-Natal, South Africa. 12. The African angel shark Squatina africana (Regan)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: RL Shelmerdine G CliffBetween 1980 and 2001, a total of 661 African angel sharks Squatina africana was caught in the protective nets off KwaZulu-Natal, South Africa. The mean annual catch was 30 sharks (range = 11–69, SD = 12.4), with no trend in... -
Influence of the annual sardine run on catches of large sharks in the protective gillnets off KwaZulu-Natal, South Africa, and the occurrence of sardine in shark diet
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SFJ Dudley --- , South Africa G Cliff --- , South AfricaShark catches in the protective nets set off the beaches of KwaZulu-Natal (KZN), South Africa, are strongly influenced by the sardine run, the winter influx of shoals of Sardinops sagax from the south-west. The effect of the sardine run, which... -
Gear selectivity of large-mesh nets and drumlines used to catch sharks in the Queensland Shark Control Program
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WD Sumpton --- Queensland Department of Employment Economic Development and Innovation, Australia SM Taylor --- Queensland Department of Employment Economic Development and Innovation, Australia NA Gribble --- Queensland Department of Employment Economic Development and Innovation, Australia G McPherson --- Queensland Department of Employment Economic Development and Innovation, Australia T Ham --- Queensland Department of Employment Economic Development and Innovation, AustraliaCatches of sharks and bycatch in large-mesh nets and baited drumlines used by the Queensland Shark Control Program were examined to determine the efficacy of both gear types and assess fishing strategies that minimise their impacts. There were few significant... -
Trends and interventions in large whale entanglement along the South African coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MA Meÿer --- Department of Environmental Affairs, South Africa PB Best --- , South Africa MD Anderson-Reade --- , South Africa G Cliff --- , South Africa SFJ Dudley --- , South Africa SP Kirkman --- Department of Environmental Affairs, South AfricaThe major causes of large whale entanglement in South Africa are static fishing gear, especially the type associated with the West Coast rock lobster Jasus lalandii industry, and large-mesh gillnets that are set off the coast of KwaZulu-Natal (KZN) to... -
Evidence of recovery of the linefishery in the Berg River Estuary, Western Cape, South Africa, subsequent to closure of commercial gillnetting
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Hutchings BM Clark LJ Atkinson CG AttwoodA total of 248 roving creel surveys along the length of the Berg River Estuary, in the Western Cape, South Africa, recorded 626 shore-angler and 88 boat-angler outings over the period December 2002–November 2005. Catch-and-effort information was obtained from catch... -
Assessing the utility of a continuous, underway fish egg sampler (CUFES) for sampling zooplankton
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Sono --- Department of Zoology, South Africa CL Moloney --- Marine Research Institute and Department of Zoology, South Africa CD van der Lingen --- Department of Environmental Affairs, South AfricaThe accuracy of using a continuous underway fish egg sampler (CUFES) to sample zooplankton was assessed by comparing CUFES samples with those collected using a vertically towed bongo net. Samples were collected concurrently by the two samplers along four inshore-offshore... -
Abundance, composition and distribution of solid wastes in the Tanzanian waters of Lake Victoria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GW Ngupula --- Tanzania Fisheries Research Institute (TAFIRI), Tanzania RJ Kayanda --- Tanzania Fisheries Research Institute (TAFIRI), Tanzania CA Mashafi --- Tanzania Fisheries Research Institute (TAFIRI), TanzaniaThe abundance, composition and distribution of solid waste in the Tanzanian waters of Lake Victoria were quantified during surveys in May and October 2013 at 68 stations in six depth strata using the bottom trawl swept area method. By weight,... -
Dynamics of recruitment of larval and juvenile Cape stumpnose Rhabdosargus holubi (Teleostei: Sparidae) into the Swartkops and Sundays estuaries, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Y Kisten --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa P Pattrick --- Department of Zoology, South Africa NA Strydom --- Department of Zoology, South Africa R Perissinotto --- DST/NRF Research Chair in Shallow Water Ecosystems, South AfricaRecruitment of early life stages into estuaries is an integral part of the life cycle of many marine fish species. Although estuaries are naturally environmentally dynamic, they also are subject to anthropogenic disturbances, including land use and climate change, which... -
Morphometric variation in the cutlassfish Trichiurus lepturus on the Kenyan coast: implications for stock identification and management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SM Mwakiti --- University of Eldoret, Kenya B Kaunda-Arara --- University of Eldoret, Kenya CM Mlewa --- Pwani University, Kenya R Ruwa --- Kenya Marine Fisheries Research Institute, KenyaMorphometric variation was used to study population structure of the cutlassfish Trichiurus lepturus on the Kenyan coast. In all, 16 morphometric measurements taken from 193 individuals from six sites were subjected to multivariate statistical analysis in order to determine possible... -
Sharks caught in the KwaZulu-Natal bather protection programme, South Africa. 13. The tiger shark Galeocerdo cuvier
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Dicken --- KwaZulu-Natal Sharks Board, Umhlanga Rocks, South Africa G Cliff --- KwaZulu-Natal Sharks Board, Umhlanga Rocks, South Africa H Winker --- South African National Biodiversity Institute, South AfricaThe current study provides long-term catch rate and biological data for tiger sharks Galeocerdo cuvier caught in the KwaZulu-Natal bather protection programme. Between 1978 and 2014, 1 760 G. cuvier were caught in nets and between 2007 and 2014, 108... -
Focusing on monofilament nets while overlooking the priorities of artisanal fisheries governance in Senegal
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Thiao --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal A Mbaye --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal M Dème --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal HD Diadhiou --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), SenegalDespite its legal prohibition since 1998, the nylon monofilament net is still widely used in Senegalese artisanal fisheries. To achieve a complete ban on monofilament use, it is necessary to understand the main arguments for its continued use and what... -
Sharks caught in the KwaZulu-Natal bather protection programme, South Africa. 14. The smooth hammerhead shark Sphyrna zygaena (Linnaeus)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Dicken --- KwaZulu-Natal Sharks Board, South Africa H Winker --- Branch: Fisheries Management, Department of Agriculture, South Africa MJ Smale --- Port Elizabeth Museum, South Africa G Cliff --- KwaZulu-Natal Sharks Board, South AfricaThe current study provides long-term catch-rate, biological and feeding data for smooth hammerhead sharks, Sphyrna zygaena, caught in South Africa’s KwaZulu-Natal bather protection programme. In total, 2 512 S. zygaena were caught in net installations between 1978 and 2014, and... -
Age, growth and per-recruit stock assessment of southern mullet Chelon richardsonii in Saldanha Bay and Langebaan Lagoon, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Horton --- Department of Biological Sciences, South Africa D Parker --- Department of Biological Sciences, South Africa H Winker --- Branch: Fisheries Management, Department of Agriculture, South Africa SJ Lamberth --- Branch: Fisheries Management, Department of Agriculture, South Africa K Hutchings --- Anchor Environmental Consultants, South Africa SE Kerwath --- Department of Biological Sciences, South AfricaThe southern mullet Chelon richardsonii (Mugilidae) is the main target species of the inshore net fishery (gillnet and beach-seine) on the west coast of South Africa. The stock has displayed symptoms of overfishing, with a 28% reduction in the standardised... -
Local ecological knowledge demonstrates shifting baselines and the large-scale decline of sawfishes (Pristidae) in Tanzania
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: G Braulik --- University of St Andrews, United Kingdom M Kasuga --- Wildlife Conservation Society Tanzania Program, Tanzania G Majubwa --- Ambakofi, TanzaniaSawfishes are coastally distributed rays that grow to very large sizes. All five species are assessed as Endangered or Critically Endangered as a result of population declines caused mainly by entanglements in fishing gear and by habitat degradation. Three species... -
Food insecurity among students living with HIV: Strengthening safety nets at the Nelson Mandela Metropolitan University, South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: L. Steenkamp --- , , South Africa A. Goosen --- , , South Africa D. Venter --- , South Africa M. Beeforth --- , , South AfricaThe HIV prevalence in South Africa among students at higher education institutions (HEIs) in 2008 was reported to be 3.4%, with the highest HIV prevalence found in the Eastern Cape Province. Students at these facilities are also increasingly affected by... -
Net convergence structures with applications to vector lattices
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: M. O’Brien --- University of Alberta, Canada V.G. Troitsky --- University of Alberta, Canada J.H. van der Walt --- University of Pretoria, South AfricaConvergence is a fundamental topic in analysis that is most commonly modeled using topology. However, there are many natural convergences that are not given by any topology; e.g., convergence almost everywhere of a sequence of measurable functions and order convergence... -
A tree-level analysis of baboon damage in commercial forest stands using deep learning techniques
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Regardt Ferreira --- Nelson Mandela University, South Africa Kabir Peerbhay --- , South Africa Josua Louw --- Nelson Mandela University, South Africa Ilaria Germishuizen --- Institute for Commercial Forestry Research, South Africa Andrew Morris --- Institute for Commercial Forestry Research, South Africa Romano Lottering --- University of KwaZulu-Natal, South AfricaCommercial forest plantations in South Africa are homogeneous monocultures of highly bred exotic species grown to deliver timber products of the best potential quality. As such, these stands are susceptible to adverse effects of biotic and abiotic factors, and therefore... -
Cape Gannet Morus capensis year-round presence off the southern Cape coast of South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Zanri Strydom --- , South Africa Tiaan Strydom --- , South AfricaThe year-round presence and abundance of Cape Gannets Morus capensis in the greater Wilderness waters (Western Cape, South Africa) were monitored through a land-based observational study, 330 km (straight-line distance) from the nearest breeding colony, Bird Island Algoa Bay. Between...
