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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Phylogeography of the copper shark (Carcharhinus brachyurus) in the southern hemisphere: Implications for the conservation of a coastal apex predator
Marine and Freshwater Research, Volume 62, No. 7, Year 2011
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Description
The copper or bronze whaler shark (Carcharhinus brachyurus) is a large, coastal top predator that is vulnerable to overexploitation. We test the null hypothesis that copper sharks are panmictic throughout the southern hemisphere. We analysed part of the mitochondrial control region (mtCR) in 120 individuals from eight sampling areas, defining 20 mtCR haplotypes (h = 0.76 ± 0.06, π = 0.016 ± 0.0007). Significant genetic structure was detected among the following three major coastal regions separated by oceanic habitat: Australia-New Zealand, South Africa-Namibia and Per (AMOVA Φ ST=0. 95, P < 0.000001). A major phylogeographic discontinuity exists across the Indian Ocean, indicating an absence of at least female-mediated gene flow for ∼3 million years. We propose that this species originated in the Atlantic, experienced vicariant isolation of Pacific and Atlantic lineages by the rise of the Isthmus of Panama and, subsequently, dispersed across the Pacific to colonise Australasia. Oceanic expanses appear to be traversed over evolutionary but not ecological timescales, which means that regional copper-shark populations should be assessed and managed independently. © CSIRO 2011.
Authors & Co-Authors
Benavides, Martin T.
United States, Stony Brook
Stony Brook University
Feldheim, Kevin Andrew
United States, Chicago
Field Museum of Natural History
Duffy, Clinton A.J.
New Zealand, Wellington
Te Papa Atawhai
Wintner, Sabine P.
South Africa, Umhlanga Rocks
Natal Sharks Board
South Africa, Durban
University of Kwazulu-natal
Braccini, Matías
Canada, Vancouver
The University of British Columbia
Australia, Deception Bay
Southern Fisheries Centre
Boomer, Jessica J.
Australia, Sydney
Macquarie University
Huveneers, Charlie P.M.
Australia, Adelaide
South Australian Research and Development Institute
Australia, Adelaide
Flinders University
Rogers, Paul J.
Australia, Adelaide
South Australian Research and Development Institute
Australia, Adelaide
Flinders University
Mangel, Jeffrey C.
Peru, Lima
Pro Delphinus
United Kingdom, Exeter
University of Exeter
Alfaro-Shigueto, Joanna
Peru, Lima
Pro Delphinus
United Kingdom, Exeter
University of Exeter
Cartamil, Daniel P.
United States, La Jolla
Scripps Institution of Oceanography
Chapman, Demian D.F.
United States, Stony Brook
Stony Brook University
Statistics
Citations: 12
Authors: 12
Affiliations: 13
Identifiers
Doi:
10.1071/MF10236
Research Areas
Genetics And Genomics
Study Locations
Namibia
South Africa
Participants Gender
Female