Population structure and connectivity of tiger sharks (Galeocerdo cuvier) across the indo-pacific ocean basin

Bonnie J Holmes; S M Williams; N M Otway; E E Nielsen; S L Maher; M B Bennett; J R Ovenden

doi:10.1098/rsos.170309

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Population structure and connectivity of tiger sharks (Galeocerdo cuvier) across the indo-pacific ocean basin

Journal article

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Population structure and connectivity of tiger sharks (Galeocerdo cuvier) across the indo-pacific ocean basin

Bonnie J Holmes, S M Williams, N M Otway, E E Nielsen, S L Maher, M B Bennett and J R Ovenden

Royal Society Open Science, Vol.4(7)

2017

DOI: https://doi.org/10.1098/rsos.170309

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Abstract

Galeocerdo cuvier

Indo-Pacific Ocean

microsatellite loci

population structure

tiger shark

Population genetic structure using nine polymorphic nuclear microsatellite loci was assessed for the tiger shark (Galeocerdo cuvier) at seven locations across the Indo-Pacific, and one location in the southern Atlantic. Genetic analyses revealed considerable genetic structuring (FST > 0.14, p < 0.001) between all Indo-Pacific locations and Brazil. By contrast, no significant genetic differences were observed between locations from within the Pacific or Indian Oceans, identifying an apparent large, single Indo-Pacific population. A lack of differentiation between tiger sharks sampled in Hawaii and other Indo-Pacific locations identified herein is in contrast to an earlier global tiger shark nDNA study. The results of our power analysis provide evidence to suggest that the larger sample sizes used here negated any weak population subdivision observed previously. These results further highlight the need for cross-jurisdictional efforts to manage the sustainable exploitation of large migratory sharks like G. cuvier.

Details

Title: Population structure and connectivity of tiger sharks (Galeocerdo cuvier) across the indo-pacific ocean basin
Authors: Bonnie J Holmes (Author) - University of Queensland
S M Williams (Author) - University of Queensland
N M Otway (Author)
E E Nielsen (Author) - University of Queensland
S L Maher (Author) - University of Queensland
M B Bennett (Author) - University of Queensland
J R Ovenden (Author) - University of Queensland
Publication details: Royal Society Open Science, Vol.4(7)
Publisher: Royal Society Publishing
Date published: 2017
DOI: 10.1098/rsos.170309
ISSN: 2054-5703
Copyright note: Copyright © 2017 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99451108102621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Marine & Freshwater Biology