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Marine Biology

, Volume 158, Issue 4, pp 903–915 | Cite as

Population genetic structure and genetic diversity of three critically endangered Pristis sawfishes in Australian waters

  • Nicole M. Phillips
  • Jennifer A. Chaplin
  • David L. Morgan
  • Stirling C. Peverell
Original Paper

Abstract

Northern Australia is considered to be one of the last strongholds for three critically endangered sawfishes, Pristis zijsron, Pristis clavata, and Pristis microdon, making these populations of global significance. Population structure and levels of genetic diversity were assessed for each species across northern Australia using a portion of the mitochondrial control region. Statistically significant genetic structure was detected in all three species, although it was higher in P. microdon (F ST = 0.811; N = 149) than in either P. clavata (F ST = 0.419; N = 73) or P. zijsron (F ST = 0.202; N = 49), possibly due to a much higher and/or localized level of female philopatry in P. microdon. The overall levels of haplotype diversity in P. zijsron (h = 0.555), P. clavata (h = 0.489), and P. microdon (h = 0.650) were moderate, although it appears to be reduced in the assemblages of P. zijsron and P. clavata in the Gulf of Carpentaria (h = 0.342 and h = 0.083, respectively). Since female migration (replenishment) between regions is unlikely, conservation plans should strive to maintain current levels of diversity and abundances in the regional assemblages of each species.

Keywords

Control Region West Coast Haplotype Diversity North Coast Mismatch Distribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This study was funded by the Australian Government Department of the Environment, Water, Heritage and the Arts and Murdoch University. Thank you to all of the people who donated tissue samples. Thanks also to the Western Australian Department of Fisheries (Rory McAuley and Justin Chidlow), Cairns Marine (Lyle Squire Jnr), Northern Territory Department of Fisheries (Grant Johnson), the Museum and Art Gallery of the Northern Territory (Helen Larson), the Western Australian Museum (Glenn Moore and Sue Morrison), the Australian National Museum (Jeff Johnson), and the Australian Institute of Marine Science (Iain Field). Thank you also to all the people who provided assistance in sample collection including Jeff Whitty, James Tweedley, Dean Thorburn, Simon Visser, Jenny Giles, and William White. We would also like to thank the Yiriman Rangers including, Travis Fazeldean, Cannie, Nyaburu and Kimberley Watson, Josh Albert and Simon Keenan for help with sample collections. Lastly, we would like to thank Michelle Gardner, Glenn Moore, and the anonymous reviewers for comments and suggestions that have improved the quality of this manuscript.

Supplementary material

227_2010_1617_MOESM1_ESM.doc (130 kb)
Supplementary material 1 (DOC 129 kb)

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Nicole M. Phillips
    • 1
  • Jennifer A. Chaplin
    • 1
  • David L. Morgan
    • 1
  • Stirling C. Peverell
    • 2
  1. 1.Centre for Fish and Fisheries ResearchMurdoch UniversityMurdochAustralia
  2. 2.Queensland Department of Primary Industries and Fisheries, Sustainable Fisheries, Northern Fisheries CentreCairnsAustralia

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