The extent of population genetic subdivision differs among four co-distributed shark species in the Indo-Australian archipelago

Ovenden, J. R., Kashiwagi, T., Broderick, D., Giles, J. and Salini, J. (2009) The extent of population genetic subdivision differs among four co-distributed shark species in the Indo-Australian archipelago. BMC Evolutionary Biology, 9 40: x-x. doi:10.1186/1471-2148-9-40


Author Ovenden, J. R.
Kashiwagi, T.
Broderick, D.
Giles, J.
Salini, J.
Title The extent of population genetic subdivision differs among four co-distributed shark species in the Indo-Australian archipelago
Journal name BMC Evolutionary Biology   Check publisher's open access policy
ISSN 1471-2148
Publication date 2009-02
Year available 2009
Sub-type Article (original research)
DOI 10.1186/1471-2148-9-40
Open Access Status DOI
Volume 9
Issue 40
Start page x
End page x
Total pages 15
Place of publication United Kingdom
Publisher BioMed Central Ltd.
Collection year 2010
Language eng
Subject 960503 Ecosystem Assessment and Management of Coastal and Estuarine Environments
060801 Animal Behaviour
060205 Marine and Estuarine Ecology (incl. Marine Ichthyology)
C1
Abstract Background: The territorial fishing zones of Australia and Indonesia are contiguous to the north of Australia in the Timor and Arafura Seas and in the Indian Ocean to the north of Christmas Island. The area surrounding the shared boundary consists of a variety of bio-diverse marine habitats including shallow continental shelf waters, oceanic trenches and numerous offshore islands. Both countries exploit a variety of fisheries species, including whaler (Carcharhinus spp.) and hammerhead sharks (Sphyrna spp.). Despite their differences in social and financial arrangements, the two countries are motivated to develop complementary co-management practices to achieve resource sustainability. An essential starting point is knowledge of the degree of population subdivision, and hence fisheries stock status, in exploited species. Results: Populations of four commercially harvested shark species (Carcharhinus obscurus, Carcharhinus sorrah, Prionace glauca, Sphyrna lewini) were sampled from northern Australia and central Indonesia. Neutral genetic markers (mitochondrial DNA control region sequence and allelic variation at co-dominant microsatellite loci) revealed genetic subdivision between Australian and Indonesian populations of C. sorrah. Further research is needed to address the possibility of genetic subdivision among C. obscurus populations. There was no evidence of genetic subdivision for P. glauca and S. lewini populations, but the sampling represented a relatively small part of their distributional range. For these species, more detailed analyses of population genetic structure is recommended in the future. Conclusion: Cooperative management between Australia and Indonesia is the best option at present for P. glauca and S. lewini, while C. sorrah and C. obscurus should be managed independently. On-going research on these and other exploited shark and ray species is strongly recommended. Biological and ecological similarity between species may not be a predictor of population genetic structure, so species-specific studies are recommended to provide new data to assist with sustainable fisheries management.
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Biomedical Sciences Publications
 
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Created: Thu, 10 Sep 2009, 11:57:31 EST by Cameron Harris on behalf of School of Biomedical Sciences