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    The identity of the Depuch Island rock-wallaby revealed through ancient DNA

    Access Status
    Fulltext not available
    Authors
    Haouchar, D.
    Haile, J.
    Spencer, P.
    Bunce, Michael
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Haouchar, D. and Haile, J. and Spencer, P. and Bunce, M. 2013. The identity of the Depuch Island rock-wallaby revealed through ancient DNA. Australian Mammalogy. 35: pp. 101-106.
    Source Title
    Australian Mammalogy
    DOI
    10.1071/AM11044
    ISSN
    03100049
    School
    Department of Environment and Agriculture
    URI
    http://hdl.handle.net/20.500.11937/49636
    Collection
    • Curtin Research Publications
    Abstract

    Ancient DNA is becoming increasingly recognised as a tool in conservation biology to audit past biodiversity. The widespread loss of Australian biodiversity, especially endemic mammal populations, is of critical concern. An extreme example occurred on Depuch Island, situated off the north-west coast of Western Australia, where an unidentified species of rock-wallaby (Petrogale sp.) became extinct as a result of predation by red foxes. Two potential candidate species, Petrogale lateralis and P. rothschildi, both have ranges adjacent to Depuch Island, making identification based on geography difficult. A museum bone (one of the only surviving Depuch Island specimens) was subjected to standard ancient DNA analyses and procedures. Mitochondrial DNA cytochrome b and hypervariable control region were targeted for species identification.AncientDNAwas successfully recovered from the bone: 200 base pairs (bp) of control region and 975 bp of the cytochrome b gene. Bayesian phylogenetic analyses were employed to model the Depuch Island rock-wallaby DNA sequences together with sequences of other rock-wallaby taxa from GenBank. Evidence suggests that of the two Petrogale lateralis subspecies proposed to have inhabited Depuch Island, Petrogale lateralis lateralis was identified as the most likely. The identification of the Depuch Island rock-wallaby population may assist in the reintroduction of an insurance population of Petrogale lateralis lateralis, which is becoming increasingly threatened on mainland Australia.

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