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    Genetic population structure of grey mackerel Scomberomorus semifasciatus in northern Australia

    Access Status
    Fulltext not available
    Authors
    Broderick, D.
    Ovenden, J.
    Buckworth, R.
    Newman, Stephen
    Lester, R.
    Welch, D.
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Broderick, D. and Ovenden, J. and Buckworth, R. and Newman, S. and Lester, R. and Welch, D. 2011. Genetic population structure of grey mackerel Scomberomorus semifasciatus in northern Australia. Journal of Fish Biology. 79 (3): pp. 633-661.
    Source Title
    Journal of Fish Biology
    DOI
    10.1111/j.1095-8649.2011.03055.x
    ISSN
    0022-1112
    School
    Department of Environment and Agriculture
    URI
    http://hdl.handle.net/20.500.11937/52092
    Collection
    • Curtin Research Publications
    Abstract

    This study used mtDNA sequence and microsatellite markers to elucidate the population structure of Scomberomorus semifasciatus collected from 12 widespread sampling locations in Australia. Samples (n = 544) were genotyped with nine microsatellite loci, and 353 were sequenced for the control (384 bp) and ATPase (800 bp) mtDNA gene regions. Combined interpretation of microsatellite and mtDNA data identified four genetic stocks of S. semifasciatus: Western Australia, north-west coast of the Northern Territory, Gulf of Carpentaria and the eastern coast of Queensland. Connectivity among stocks across northern Australia from the Northern Territory to the eastern coast of Queensland was high (mean F ST = 0·003 for the microsatellite data and F ST = 0·033 and 0·009 for control region and ATPase, respectively) leading to some uncertainty about stock boundaries. In contrast, there was a clear genetic break between the stock in Western Australia compared to the rest of northern Australia (mean F ST = 0·132 for the microsatellite data and F ST = 0·135 and 0·188 for control region and ATPase, respectively). This indicates a restriction to gene flow possibly associated with suboptimal habitat along the Kimberley coast (north Western Australia). The appropriate scale of management for this species corresponds to the jurisdictions of the three Australian states, except that authorities in Queensland and Northern Territory should co-ordinate the management of the Gulf of Carpentaria stock. © 2011 State of Queensland. Journal of Fish Biology © 2011 The Fisheries Society of the British Isles.

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