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Some observations on the reproductive biology of The sixgill shark Hexanchus griseus (Bonnaterre, 1788) from southern African waters
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: D. A. EbertObservations are made of the maturation status of 81 male and 88 female sixgill sharks Hexanchus griseus from southern African waters. Males mature at about 310 cm total length (TL) with the calcification of the terminal cartilage elements of the... -
Age and growth of the spinner shark Carcharhinus brevipinna (Müller and Henle, 1839) off the KwaZulu-Natal coast, South Africa
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: B. R. Allen S. P. WintnerAge and growth of the spinner shark Carcharhinus brevipinna off the KwaZulu-Natal coast of South Africa was investigated from vertebral growth ring counts of 67 specimens (54–213 cm precaudal length, PCL). Counts were made from sectioned vertebral centra by two... -
The diet of the ragged-tooth shark Carcharias taurus Rafinesque 1810 in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MJ SmaleThe ragged-tooth shark Carcharias taurus is a large predator of inshore coastal waters in the Eastern Cape, South Africa. Born at about 1m long and attaining approximately 3m, stomach content analyses have shown that it feeds largely on teleosts and... -
Shark fishing effort and catch of the ragged-tooth shark Carcharias taurus in the South African competitive shore-angling fishery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Dicken MJ Smale AJ BoothAn integrated telephone and on-site questionnaire survey was used to estimate total shark fishing effort and specific catch of the ragged-tooth shark Carcharias taurus by coastal club-affiliated shore-anglers, primarily along the east coast of South Africa. Mean total shark fishing... -
White shark and other chondrichthyan interactions with the beach-seine (treknet) fishery in False Bay, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SJ LamberthPublic perception has been that an apparent increase in the nearshore occurrence of white sharks Carcharodon carcharias in False Bay, on the south coast of South Africa, can at least be partly attributed to beach-seine (treknet) operations attracting sharks into... -
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... -
The frequency and effect of shark-inflicted bite injuries to the reef manta ray Manta alfredi
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AD Marshall --- School of Biomedical Sciences, Australia MB Bennett --- School of Biomedical Sciences, AustraliaShark bite injuries on reef manta rays Manta alfredi off the coast of Inhambane, Mozambique, were examined over a three-year period (2003–2006). The frequency and seasonality of attacks, the rate of wound healing, and the possible identities of attackers were... -
First documented southern transatlantic migration of a blue shark Prionace glauca tagged off South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C da Silva --- Branch Fisheries, Department of Agriculture, Forestry and Fisheries, South Africa SE Kerwath --- Branch Fisheries, Department of Agriculture, Forestry and Fisheries, South Africa CG Wilke --- Branch Fisheries, Department of Agriculture, Forestry and Fisheries, South Africa M Meÿer --- Oceans and Coasts, Department of Environmental Affairs, South Africa SJ Lamberth --- Branch Fisheries, Department of Agriculture, Forestry and Fisheries, South AfricaThe first documented recapture of a South African-tagged juvenile blue shark Prionace glauca off Uruguay lends weight to the hypothesis of a single blue shark population in the South Atlantic. The presence of neonate blue sharks with umbilical scars and... -
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... -
Liver lipids of Indian and Atlantic Ocean spinner Carcharhinus brevipinna and blacktip Carcharhinus limbatus sharks
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Davidson --- , Netherlands Antilles M Zayed --- , Netherlands Antilles S Zayed --- , Netherlands Antilles G Cliff --- , South AfricaShark liver oils are rich in polyunsaturated fatty acids, especially the n3 moieties. Data on the liver fatty acids of sharks from African waters, however, are limited. Liver samples from sharks from the western Indian Ocean off the east coast... -
Noteworthy elasmobranch records from Oman
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Henderson --- Department of Marine Science and Fisheries, Sultanate of Oman AJ ReeveRecords of 11 elasmobranch species previously unreported from, or uncommon in, Omani waters are presented. Records new to Oman include Carcharhinus altimus, C. leiodon, Centrophorus isodon, Ctenacis fehlmanni, Himantura fai, Mobula eregoodootenke and Sphyrna zygaena, whereas noteworthy records of uncommon... -
Distribution and movement of scalloped hammerhead Sphryna lewini and smooth hammerhead Sphyrna zygaena sharks along the east coast of southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: KM Diemer --- Great Lakes Institute of Environmental Research, Canada BQ Mann --- , South Africa NE Hussey --- Great Lakes Institute of Environmental Research, CanadaKnowledge of population distribution and movement is crucial for the conservation and management of shark species occurring in coastal waters. From 1984 to 2009, 641 scalloped hammerheads Sphyrna lewini, 1 342 smooth hammerheads Sphyrna zygaena and 1 352 unspecified hammerheads... -
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... -
A first description of the artisanal shark fishery in northern Madagascar: implications for management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Robinson --- Department of Ichthyology and Fisheries Science, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South AfricaIn the past two decades, small, targeted artisanal shark fisheries have developed in the extreme north of Madagascar, largely in response to the shark fin trade. Few studies have been undertaken to assess the biological characteristics and impact of these... -
Composition of elasmobranch landings in Bahrain
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ABM Moore --- RSK Environment Ltd, UK R Peirce --- Shark Conservation Society, UKThe first detailed elasmobranch fisheries data for the Kingdom of Bahrain are presented, based on surveys of fish markets in April 2012. At least 25 species were recorded, including undescribed taxa. The milk shark Rhizoprionodon acutus was the most frequently... -
A preliminary study of allozyme differences amongst Carcharhinus sharks from the continental slope near Abidjan, Côte d'lvoire
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Béatrice Adepo-Gourène Lounès Chikhi Jean-François Agnèse Germain Gourène Alain HervéGenetic variability of fifty-five shark specimens from the genus Carcharhinus was analysed using 18 allozyme loci. Sixteen loci were polymorphic either within, or between, species. Levels of genetic polymorphism, as measured by observed heterozygosity values, ranged from 0.008 (±0.008) to... -
Spatial distribution of Nemesis lamna Risso 1826 (Copepoda: Siphonostomatoida: Eudactylinidae) on the gills of white sharks Carcharodon carcharias off KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Dippenaar R van Tonder S Wintner P ZunguThe selection of a specific site of attachment by a copepod parasite is determined by a set of mostly unknown factors. The spatial distribution of Nemesis lamna on the gill filaments of white sharks Carcharodon carcharias was investigated. The complete... -
Socio-economic aspects of the tiger shark diving industry within the Aliwal Shoal Marine Protected Area, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Dicken --- Department of Development Studies, School of Economics, Development and Tourism, South Africa SG Hosking --- Department of Business Studies, School of Economics, Development and Tourism, South AfricaUnderstanding socio-economic aspects of the tiger shark Galeocerdo cuvier diving industry, including information on participant expectations, experiences and expenditure, is necessary for the effective management of the Aliwal Shoal Marine Protected Area on the east coast of South Africa. Between... -
Size distributions and sex ratios of sharks caught by Oman's artisanal fishery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Henderson --- Department of Marine Science and Fisheries, College of Agricultural and Marine Sciences, Sultanate of Oman JL McIlwain --- Department of Marine Science and Fisheries, College of Agricultural and Marine Sciences, Sultanate of Oman HS Al-Oufi --- Department of Marine Science and Fisheries, College of Agricultural and Marine Sciences, Sultanate of Oman S Al-Sheile --- Department of Marine Science and Fisheries, College of Agricultural and Marine Sciences, Sultanate of Oman N Al-Abri --- Department of Marine Science and Fisheries, College of Agricultural and Marine Sciences, Sultanate of OmanOman's fishery resources are exploited by artisanal and industrial fisheries, but the former accounts for almost 90% of landings. Within the artisanal fishery, sharks have traditionally been harvested for their flesh, but the development of a valuable export market for... -
Pelagic shark bycatch in the tuna- and swordfish-directed longline fishery off southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SL Petersen --- , South Africa MB Honig --- , South Africa PG Ryan --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa LG Underhill --- Animal Demography Unit, Department of Zoology, South Africa LJV Compagno --- , South AfricaThe capture of pelagic sharks as bycatch of the South African pelagic longline fleet targeting tuna Thunnus spp. and swordfish Xiphias gladius was investigated during the period 1998-2005. In all, 26 species were caught, of which six are listed by... -
Confirmation of the occurrence of a second killer whale morphotype in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PB Best --- Mammal Research Institute, Whale Unit, South Africa MA Meÿer --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa M Thornton --- Mammal Research Institute, Whale Unit, South Africa PGH Kotze --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa SM Seakamela --- Branch: Oceans and Coasts, Department of Environmental Affairs, South Africa GJG Hofmeyr --- Port Elizabeth Museum at Bayworld, Port Elizabeth, and Department of Zoology, South Africa S Wintner --- KwaZulu-Natal Sharks Board, Umhlanga Rocks, and Biomedical Resource Unit, South Africa CD Weland --- Canadian Centre for DNA Barcoding, Biodiversity Institute of Ontario, Canada D Steinke --- Canadian Centre for DNA Barcoding, Biodiversity Institute of Ontario, CanadaKiller whales Orcinus orca occur worldwide in a number of morphotypes that differ in size, pigmentation, acoustic behaviour, food type and genetics – some may indeed warrant subspecific or even specific status. Until recently, all killer whales in South African... -
Assessing the suitability of commercial fisheries data for local-scale marine spatial planning in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Chalmers --- Department of Ichthyology and Fisheries Science, South Africa A Oosthuizen --- Park Planning and Development, South African National Parks, South Africa A Götz --- Department of Ichthyology and Fisheries Science, South Africa A Paterson --- South African Institute for Aquatic Biodiversity, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South AfricaThis study integrates fisheries logbook data with observer and vessel monitoring system (VMS) data in order to assess the accuracy of reported data and to develop high-resolution spatial data suitable for use in local-scale marine spatial planning analyses. Spatial assessments... -
White shark (Carcharodon carcharias)-inflicted bite wounds observed on Cape fur seals (Arctocephalus pusillus pusillus) at Black Rocks, Algoa Bay, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Matthew L. Dicken --- KwaZulu-Natal Sharks Board, South Africa Michelle Bradshaw --- Port Elizabeth Museum, South Africa Malcolm J. Smale --- Port Elizabeth Museum, South AfricaThis paper presents the first quantitative study on the seasonal occurrence and body location of white shark (Carcharodon carcharias)-inflicted injuries on Cape fur seals (Arctocephalus pusillus pusillus) at Black Rocks, in Algoa Bay. Between January 2010 and October 2011, 22... -
The evolution of chondrichthyan research through a metadata analysis of dedicated international conferences between 1991 and 2014
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Huveneers --- School of Biological Sciences, Flinders University, Australia DA Ebert --- Pacific Shark Research Center, Moss Landing Marine Laboratories, USA SFJ Dudley --- Branch: Fisheries Management, Department of Agriculture, South AfricaScience is continually evolving, with recent developments in some fields, such as conservation biology, leading to shifts in priorities and needs. Recent international conferences focused on chondrichthyan research provide an opportunity to assess how the research environment of chondrichthyan science... -
The current status and management of South Africa's chondrichthyan fisheries
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C da Silva --- Branch: Fisheries Management, Department of Agriculture, South Africa AJ Booth --- Department of Ichthyology and Fisheries Science, South Africa SFJ Dudley --- Branch: Fisheries Management, Department of Agriculture, South Africa SE Kerwath --- Branch: Fisheries Management, Department of Agriculture, South Africa SJ Lamberth --- Branch: Fisheries Management, Department of Agriculture, South Africa RW Leslie --- Branch: Fisheries Management, Department of Agriculture, South Africa ME McCord --- South African Shark Conservancy (SASC), South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South Africa T Zweig --- South African Shark Conservancy (SASC), South AfricaChondrichthyans (sharks, skates, rays and chimaeras) are captured in many marine fisheries. Management and research efforts directed at chondrichthyan fishing are often neglected because of low product value, taxonomic uncertainty, low capture rates, and harvesting by multiple fisheries. In South... -
Pelagic shark fisheries of Indonesia's Eastern Indian Ocean Fisheries Management Region
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Fahmi --- Research Centre for Oceanography, Indonesian Institute of Sciences, Indonesia Dharmadi --- Research Centre for Fisheries Management and Conservation, Ministry of Marine Affairs and Fisheries, IndonesiaSharks are commonly caught in Indonesian waters both by target fisheries and as bycatch. Fishers targeting sharks mostly employ drift longlines, whereas tuna longlines and gillnets are the gear mostly responsible for shark bycatch. Our studies on shark fisheries have... -
Fisheries management and conservation of sharks in Indonesia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: Dharmadi --- Research Centre for Fisheries Management and Conservation, Indonesia Fahmi --- Research Centre for Oceanography, Indonesia F Satria --- Research Centre for Fisheries Management and Conservation, IndonesiaIndonesian waters have a high diversity of sharks and rays, with at least 118 species belonging to 25 families found throughout the vast archipelago. Indonesia also has the highest shark landings globally and nearly all high‑value shark species are overexploited... -
Seasonal variability of bull and tiger shark presence on the west coast of Reunion Island, western Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Blaison --- IRD La Réunion, UMR MARBEC (IRD/IFREMER/UM/CNRS), France S Jaquemet --- Université de La Réunion, France D Guyomard --- Comité Régional des Pêches Maritimes et des Elevages Marins de La Réunion (CRPMEM), France G Vangrevelynghe --- Squal'Idées, Stella, France T Gazzo --- WEST, Saint Gilles, France G Cliff --- KwaZulu-Natal Sharks Board, South Africa P Cotel --- IRD La Réunion, UMR MARBEC (IRD/IFREMER/UM/CNRS), France M Soria --- IRD La Réunion, UMR MARBEC (IRD/IFREMER/UM/CNRS), FranceA fisheries‑independent survey using longlines and drumlines, and an acoustic telemetry study, revealed that bull sharks Carcharhinus leucas and tiger sharks Galeocerdo cuvier occur throughout the year off the west coast of Reunion Island. The research, which commenced in 2011,... -
Molecular species identification and population genetics of chondrichthyans in South Africa: current challenges, priorities and progress
Item type: Journal Article • Journal: African Zoology • Authors: Aletta E Bester-van der Merwe --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa Katie S Gledhill --- South African Shark Conservancy, South AfricaMolecular genetic techniques, such as DNA barcoding and genotyping, are increasingly being used to assist with the conservation and management of chondrichthyans worldwide. Southern Africa is a shark biodiversity hotspot, with a large number of endemic species. According to the... -
Kroyeria deetsi n.sp. (Kroyeriidae: Siphonostomatoida), a parasitic copepod infecting gills of spinner sharks, Carcharhinus brevipinna (Müller & Henle, 1839), in the Indian Ocean
Item type: Journal Article • Journal: African Zoology • Authors: Susan M. Dippenaar --- Department of ZoologyandBiology, South Africa George W. Benz --- Tennessee Aquarium and Southeast Aquatic Research Institute, U.S.A. Pieter A.S. Olivier --- Department of ZoologyandBiology, South AfricaKroyeria deetsi n.sp. (Kroyeriidae: Siphonostomatoida) is described from both sexes collected from the gills of spinner sharks, Carcharhinus brevipinna (Müller & Henle, 1839), captured in the Indian Ocean off the coast of South Africa. Kroyeriadeetsi n.sp. can easily be distinguished... -
Reflection on the first five years of South Africa’s Acoustic Tracking Array Platform (ATAP): status, challenges and opportunities
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PD Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa RH Bennett --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa A-R Childs --- Department of Ichthyology and Fisheries Science, South Africa TS Murray --- South African Institute for Aquatic Biodiversity (SAIAB), South AfricaThe Acoustic Tracking Array Platform (ATAP) is a marine science programme that monitors the movements and migrations of inshore marine animals along the South African coastline. Acoustically tagged animals are monitored by an expanded network of approximately 100 automated data-logging... -
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... -
Genomic resources for the spotted ragged-tooth shark Carcharias taurus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JD Klein --- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, South Africa AE Bester-van der Merwe --- Molecular Breeding and Biodiversity Group, Department of Genetics, South Africa ML Dicken --- KwaZulu-Natal Sharks Board, South Africa A Emami-Khoyi --- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, South Africa KL Mmonwa --- KwaZulu-Natal Sharks Board, South Africa PR Teske --- Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, South AfricaGenomic data can be a useful tool in the management and conservation of biodiversity. Here, we report the development of genomic resources for the spotted ragged-tooth shark Carcharias taurus using genome-wide DNA data from Illumina next-generation sequencing. We explored two... -
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... -
All washed up: spatial and temporal variation in the wash-up and fate of chondrichthyan egg cases along a section of the Garden Route, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Schmöle --- , The Netherlands M Brown --- , South Africa M Witteveen --- , South AfricaWashed-up chondrichthyan egg cases were collected along three different sandy beaches around Plettenberg Bay, South Africa, between April 2016 and March 2017. GPS location was recorded upon collection, and, after being soaked in fresh water for 12 hours, egg cases... -
Large-scale movements and site fidelity of two bull sharks Carcharhinus leucas estimated from a double-tagging experiment at Réunion Island (southwest Indian Ocean)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Soria --- , France Y Tremblay --- , France A Blaison --- , France F Forget --- , France E Crochelet --- , Réunion L Dagorn --- , FranceSince 2011, the mean number of bites per year by bull sharks Carcharhinus leucas has increased markedly at Réunion Island. To predict areas and periods of increased risk, we need to better understand the space-use dynamics of individual sharks. In... -
Movement patterns and growth rate of the whitespotted wedgefish Rhynchobatus djiddensis in southern Africa based on tag-recapture data
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GL Jordaan --- , South Africa BQ Mann --- , South Africa R Daly --- , South Africa SW Dunlop --- , South Africa PD Cowley --- , South AfricaInformation on the movement ecology of endangered species is critical for the implementation of effective conservation measures. This study made use of a long-term dart tagging dataset to reveal the movement patterns and growth rates of two size classes of... -
Bull shark Carcharhinus leucas recruitment into the St Lucia Estuary, South Africa, after prolonged mouth closure, and the first observation of a neonate bull shark preyed on by a Nile crocodile Crocodylus niloticus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R Daly --- , South Africa P Le Noury --- , United Kingdom TN Hempson --- , Mozambique M Ziembicki --- , Mozambique JM Olbers --- , South Africa GM Brokensha --- , South Africa BQ Mann --- , South AfricaEstuaries provide critical nursery habitat for juvenile bull sharks Carcharhinus leucas, as they have the ability to withstand a wide range of salinities. St Lucia is the largest estuarine lake in Africa and was once a key nursery for bull... -
Application of DNA mini-barcoding reveals illegal trade in endangered shark products in southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: TA Asbury --- , South Africa R Bennett --- , United States AS Price --- , South Africa C da Silva --- , South Africa M Bürgener --- , South Africa JD Klein --- , South Africa SN Maduna --- , South Africa N Sidat --- , Mozambique S Fernando --- , Mozambique AE Bester-van der Merwe --- , South AfricaIn recent decades, a combination of increasing demand and economic globalisation has created a global market for elasmobranch products, especially the highly prized shark fins for Asian markets. Morphological species identification, as well as traditional cytochrome c oxidase subunit I... -
Distribution and community structure of at-risk and Data Deficient elasmobranchs in Zavora Bay, Mozambique
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B O’Connor --- , The Netherlands N Cullain --- , United StatesPersistent threats from fishing pressure and increasing habitat degradation, as well as slow recovery rates resulting from K-selected life histories, are putting increasing numbers of elasmobranch species (sharks, rays and skates) at risk of extinction worldwide. Global declines in elasmobranch... -
Network analysis of the endemic spotted gully shark Triakis megalopterus reveals spatial vulnerability to exploitation in the Western Cape, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Cottrant --- , South Africa NJ Drobniewska --- , South Africa TL Johnson --- , South Africa LG Underhill --- University of Cape Town, South Africa TS Murray --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa N Hammerschlag --- University of Miami, United States PS Albano --- University of Miami, United States C Elston --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa ME McCord --- , South Africa PD Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa C Fallows --- , South Africa TG Paulet --- , South AfricaThe spotted gully shark Triakis megalopterus (Triakidae) is a mesopredatory species endemic to southern Africa. It is currently listed as Least Concern on the IUCN Red List in accordance with an estimated increase in population size, general release by recreational... -
Further insights into killer whales Orcinus orca preying on white sharks Carcharodon carcharias in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Towner --- Rhodes University, South Africa P Micarelli --- University of Siena, Italy D Hurwitz --- , South Africa MJ Smale --- Nelson Mandela University, South Africa AJ Booth --- Rhodes University, South Africa C Stopforth --- , South Africa E Jacobs --- , South Africa FR Reinero --- Sharks Studies Centre – Scientific Institute, Italy V Ricci --- Sharks Studies Centre – Scientific Institute, Italy A Di Bari --- Sharks Studies Centre – Scientific Institute, Italy S Gavazzi --- Sharks Studies Centre – Scientific Institute, Italy G Carugno --- Sharks Studies Centre – Scientific Institute, Italy M Mahrer --- Claremont McKenna College, United States E Gennari --- Rhodes University, South AfricaPhotography and video footage, captured by researchers and tourists on board two vessels, provided insights into the predation techniques employed by an adult male killer whale Orcinus orca in Mossel Bay, South Africa. The incapacitation of its prey, a juvenile... -
Movement and growth of the spotted gully shark Triakis megalopterus in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- Oceanographic Research Institute (ORI), South Africa GL Jordaan --- Oceanographic Research Institute (ORI), South Africa WN Dalton --- Oceanographic Research Institute (ORI), South Africa R Daly --- Oceanographic Research Institute (ORI), South Africa M Soekoe --- Reel Science Coalition, South Africa WM Potts --- Rhodes University, South Africa MJ Smale --- Zoology Department and Institute for Coastal and Marine Research, Nelson Mandela University, South Africa L Swart --- Fisheries and the Environment (DFFE), South AfricaThe movement and growth of spotted gully sharks Triakis megalopterus (family Triakidae) along the coast of South Africa were investigated using external dart tagging. Of a total of 7 211 sharks tagged, 657 (9.1%) were recaptured over a 37-year period,... -
Assessing the socio-economic value of shark diving in the Protea Banks Marine Protected Area, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Dicken --- , South Africa AV Towner --- Rhodes University, South Africa B Mauz --- , South Africa R Mauz --- , South AfricaProtea Banks, a reef off the east coast of South Africa and a renowned dive destination, attained marine protected area (MPA) status in 2019. This study investigates the economic significance of the shark diving industry at this MPA and examines...