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  • Fate of 2 year-old, hatchery-reared trout cod Maccullochella macquariensis (Percichthyidae) stocked into two upland rivers

    Author(s)
    Ebner, B.
    Thiem, J.
    Lintermans, M.
    Griffith University Author(s)
    Ebner, Brendan C.
    Year published
    2007
    Metadata
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    Abstract
    Radio-tracking was used in monitoring the reintroduction of on-grown 2 year-old trout cod Maccullochella macquariensis (Percichthyidae) (a nationally endangered freshwater fish) in both a large and small upland river. Thirty-six radio-tagged M. macquariensis were stocked into a site in each of the Murrumbidgee and Cotter Rivers (Australian Capital Territory). Restricted dispersal occurred in both rivers, with both samples of M. macquariensis remaining within 5 km of the release site for the duration of the study. Mortality was rapid and 1 month after release 61 and 31% of the sample was alive in the Murrumbidgee and Cotter ...
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    Radio-tracking was used in monitoring the reintroduction of on-grown 2 year-old trout cod Maccullochella macquariensis (Percichthyidae) (a nationally endangered freshwater fish) in both a large and small upland river. Thirty-six radio-tagged M. macquariensis were stocked into a site in each of the Murrumbidgee and Cotter Rivers (Australian Capital Territory). Restricted dispersal occurred in both rivers, with both samples of M. macquariensis remaining within 5 km of the release site for the duration of the study. Mortality was rapid and 1 month after release 61 and 31% of the sample was alive in the Murrumbidgee and Cotter Rivers, respectively. In the Murrumbidgee River, complete mortality had occurred 6 months after release. An individual survived in the Cotter River until 7 months after release. Predation by cormorants Phalacrocorax spp. and predation or scavenging by the common water rat Hydromys chrysogaster were the probable causes of mortality. Predator-assisted movement of radio-tags by cormorants occurred in both groups and had the potential to confound interpretation of active dispersal movements.
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    Journal Title
    Journal of Fish Biology
    Volume
    71
    Issue
    1
    DOI
    https://doi.org/10.1111/j.1095-8649.2007.01481.x
    Subject
    Freshwater Ecology
    Ecology
    Zoology
    Fisheries Sciences
    Publication URI
    http://hdl.handle.net/10072/28683
    Collection
    • Journal articles

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