Extensive genetic population structure in the Indo-West Pacific spot-tail shark, Carcharhinus sorrah

Giles, Jenny L., Ovenden, Jennifer R., Dharmadi, AlMojil, Dareen, Garvilles, Elaine, Khampetch, Kanok-on, Manjebrayakath, Hashim and Riginos, Cynthia (2014) Extensive genetic population structure in the Indo-West Pacific spot-tail shark, Carcharhinus sorrah. Bulletin of Marine Science, 90 1: 427-454. doi:10.5343/bms.2013.1009

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Author Giles, Jenny L.
Ovenden, Jennifer R.
Dharmadi
AlMojil, Dareen
Garvilles, Elaine
Khampetch, Kanok-on
Manjebrayakath, Hashim
Riginos, Cynthia
Title Extensive genetic population structure in the Indo-West Pacific spot-tail shark, Carcharhinus sorrah
Formatted title
Extensive genetic population structure in the Indo–West Pacific spot-tail shark, Carcharhinus sorrah
Journal name Bulletin of Marine Science   Check publisher's open access policy
ISSN 0007-4977
1553-6955
Publication date 2014-01-01
Sub-type Article (original research)
DOI 10.5343/bms.2013.1009
Open Access Status DOI
Volume 90
Issue 1
Start page 427
End page 454
Total pages 28
Place of publication Miami, FL, United States
Publisher Rosenstiel School of Marine and Atmospheric Science
Language eng
Formatted abstract
Carcharhinus sorrah (Mülle and Henle, 1839) is a coastal pelagic shark of the tropical and subtropical Indo–West Pacific, reaching 1.6 m total length. The species is widely harvested in line, net, and trawl fisheries over tropical continental shelves. We investigated mtDNA genetic differentiation in C. sorrah across the majority of the species' range, and examined the importance of six major historical and contemporary biogeographic features in shaping population genetic structure in this species. The present study includes dense sampling for a shark species across the Indo–West Pacific, with 349 specimens sampled from 21 collection locations from the northwestern Indian Ocean, Southeast Asia, New Caledonia, and to southerly distribution limits in Australia. Based on 469 base pairs of the control region, we found extensive genetic population structure, with allopatric lineages confined to Australia, New Caledonia, and the remaining surveyed area. Significant genetic subdivisions were observed over stretches of deep water dividing shelf habitat, particularly the Indonesian Throughflow–Timor Passage and Coral Sea, consistent with strong shelf habitat associated dispersal. Male length at maturity was consistent with a larger size throughout Southeast Asia and the Arabian Sea than known from Australia. Carcharhinus sorrah currently is assessed range-wide on the IUCN Red List (Near Threatened) based largely on Australian demographic data, which may under-represent overharvest risk in other parts of the species' range. The present study highlights the need for independent risk assessment and management for C. sorrah in Australia, Southeast Asia and the northwestern Indian Ocean, and New Caledonia.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Biological Sciences Publications
 
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Created: Thu, 13 Feb 2014, 17:36:43 EST by Gail Walter on behalf of School of Biological Sciences