Shark Conservation Society

Cornwall, United Kingdom

Shark Conservation Society

Cornwall, United Kingdom
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Moore A.B.M.,RSK Environment Ltd. | Moore A.B.M.,Bangor University | White W.T.,CSIRO | Ward R.D.,CSIRO | And 2 more authors.
Marine and Freshwater Research | Year: 2011

The smoothtooth blacktip shark, Carcharhinus leiodon, is one of the rarest whaler shark species of the genus Carcharhinus, previously known only from the holotype collected over 100 years ago from the Arabian Sea coast of Yemen. Recent market surveys in the Persian (Arabian) Gulf rediscovered 25 specimens (∼2% of individual sharks recorded) in Kuwait, ∼3000km away from the type location. This study combined morphometric and molecular approaches to provide a detailed redescription of this species based on new material, as well as the first information on fresh colouration, size range and maturity. Sequences from two separate regions of the mitochondrial genome (COI and ND2) support the identity of C. leiodon as a distinct species, closely related to C. limbatus, C. amblyrhynchoides and C. tilstoni. Carcharhinus leiodon is superficially similar to, but clearly distinct from, C. melanopterus and C. amblyrhynchoides. The previously uncertain type locality of C. leiodon is considered to be correct, and the narrow range and unusual disjunct distribution, relatively rare for a marine carcharhinid, is discussed. The Kuwait population of C. leiodon, including juveniles, is subject to fisheries by-catch and is in an area of extensive habitat alteration. As a result, C. leiodon is considered vulnerable, requiring urgent conservation action. © CSIRO 2011.

Moore A.B.M.,Bangor University | Moore A.B.M.,RSK Environment Ltd. | McCarthy I.D.,Bangor University | Carvalho G.R.,Bangor University | Peirce R.,Shark Conservation Society
Journal of Fish Biology | Year: 2012

This paper presents data from the first major survey of the diversity, biology and fisheries of elasmobranchs in the Persian (Arabian) Gulf. Substantial landings of elasmobranchs, usually as gillnet by-catch, were recorded in Kuwait, Qatar and the Emirate of Abu Dhabi (part of the United Arab Emirates), although larger elasmobranchs from targeted line fisheries were landed in Abu Dhabi. The elasmobranch fauna recorded was distinctive and included species that are undescribed, rare and have a highly restricted known distribution. Numerical abundance was dominated by sharks (c. 80%), of which carcharhinids were by far the most important. The milk shark Rhizoprionodon acutus and whitecheek shark Carcharhinus dussumieri together comprised just under half of all recorded individuals. Around 90% of recorded sharks were small (50-90 cm total length, L T) individuals, most of which were mature individuals of species with a small maximum size (<100 cm L T), although immature individuals of larger species (e.g. Carcharhinus sorrah and other Carcharhinus spp.) were also important. The most frequently recorded batoid taxa were cownose rays Rhinoptera spp., an undescribed whipray, and the granulated guitarfish Rhinobatos granulatus. The first size, sex and maturity data for a wide range of Gulf elasmobranch species are presented (including L T at 50% maturity for males of four shark species) and include some notable differences from other locations in the Indo-West Pacific Ocean. A number of concerns regarding the sustainability of the fishery were highlighted by this study, notably that most of the batoid species recorded are classed by the IUCN Red List as vulnerable, endangered, data deficient or not evaluated. Despite their considerable elasmobranch landings, none of the three countries sampled have developed a 'Shark Plan' as encouraged to do so under the FAO International Plan of Action: Sharks. Furthermore, Kuwait and Qatar currently report zero or no elasmobranch landings to the FAO. © 2012 The Authors. Journal of Fish Biology © 2012 The Fisheries Society of the British Isles.

Moore A.B.M.,Bangor University | Moore A.B.M.,RSK Environment Ltd. | White W.T.,CSIRO | Peirce R.,Shark Conservation Society
Zoology in the Middle East | Year: 2010

The diversity of the shark fauna of the Persian (Arabian) Gulf is poorly documented. Based on surveys of fish markets in Kuwait and Qatar we provide the first Gulf records of the Sliteye Shark Loxodon macrorhinus, and the first substantiated records of Snaggletooth Shark Hemipristis elongatus, Graceful Shark Carcharhinus amblyrhynchoides and Hardnose Shark C. macloti. Based on photographs of misidentified specimens in historical literature we also add the Grey Reef Shark C. amblyrhynchos and Sharptooth Lemon Shark Negaprion acutidens to the Gulf fauna. © Kasparek Verlag, Heidelberg.

Moore A.B.M.,RSK Environment Ltd | Moore A.B.M.,Bangor University | Peirce R.,Shark Conservation Society
African Journal of Marine Science | Year: 2013

The 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 recorded species; together with the Arabian smoothhound Mustelus mosis and banded eagle ray Aetomylaeus nichofii, these species comprised 53% of individual abundance. Sharks were almost entirely small individuals <1 m total length (TL). Males of small shark species were largely mature, whereas nearly all individuals of larger sharks were immature. For several elasmobranch species, landings were significantly biased towards males, which were largely mature. The species assemblage showed some notable differences in composition to that of adjacent Qatar, sampled at the same time of year, highlighting the importance of local data collection. © 2013 NISC (Pty) Ltd.

Moore A.B.M.,RSK Environment Ltd. | Moore A.B.M.,Bangor University | Ward R.D.,CSIRO | Peirce R.,Shark Conservation Society
Zootaxa | Year: 2012

The first evidence-based checklist of sharks of the Persian (Arabian) Gulf is presented based on appraisal of primary literature and new data, including identifications verified by COI barcoding. Evidence of the occurrence of 26 species in the Gulf is presented, and the possible presence of a further 17 species is discussed. Carcharhinidae is the most species-rich family (16 species) present. The first substantiated Gulf records of the spinner shark Carcharhinus brevipinna, blacktip reef shark C. melanopteruş and scalloped hammerhead Sphyrna lewini are provided, along with a new record of the rarely reported grey nurse shark Carcharias taurus. The diversity of the Gulf's shark fauna, and possible influences on it, are briefly discussed. © 2012 Magnolia Press.

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