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  • Age structure of the Australian lungfish (Neoceratodus forsteri)

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    Bond157921.pdf (6.791Mb)
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    Version of Record (VoR)
    Author(s)
    Fallon, Stewart J
    Mcdougall, Andrew J
    Espinoza, Tom
    Roberts, David T
    Brooks, Steven
    Kind, Peter K
    Kennard, Mark J
    Bond, Nick
    Marshall, Sharon M
    Schmidt, Dan
    Hughes, Jane
    Griffith University Author(s)
    Kennard, Mark J.
    Bond, Nick R.
    Hughes, Jane M.
    Schmidt, Daniel J.
    Year published
    2019
    Metadata
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    Abstract
    The Australian lungfish has been studied for more than a century without any knowledge of the longevity of the species. Traditional methods for ageing fish, such as analysis of otolith (ear stone) rings is complicated in that lungfish otoliths differ from teleost fish in composition. As otolith sampling is also lethal, this is not appropriate for a protected species listed under Australian legislation. Lungfish scales were removed from 500 fish from the Brisbane, Burnett and Mary rivers. A sub–sample of scales (85) were aged using bomb radiocarbon techniques and validated using scales marked previously with oxytetracycline. ...
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    The Australian lungfish has been studied for more than a century without any knowledge of the longevity of the species. Traditional methods for ageing fish, such as analysis of otolith (ear stone) rings is complicated in that lungfish otoliths differ from teleost fish in composition. As otolith sampling is also lethal, this is not appropriate for a protected species listed under Australian legislation. Lungfish scales were removed from 500 fish from the Brisbane, Burnett and Mary rivers. A sub–sample of scales (85) were aged using bomb radiocarbon techniques and validated using scales marked previously with oxytetracycline. Lungfish ages ranged from 2.5–77 years of age. Estimated population age structures derived using an Age Length Key revealed different recruitment patterns between river systems. There were statistically significant von Bertalanffy growth model parameters estimated for each of the three rivers based on limited sample sizes. In addition, length frequency distributions between river systems were also significantly different. Further studies will be conducted to review drivers that may explain these inter-river differences.
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    Journal Title
    PLOS ONE
    Volume
    14
    Issue
    1
    DOI
    https://doi.org/10.1371/journal.pone.0210168
    Copyright Statement
    © 2019 Fallon, et. al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
    Subject
    Biological Sciences
    Publication URI
    http://hdl.handle.net/10072/382878
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    • Journal articles

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