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    Evaluating the effectiveness of teeth and dorsal fin spines for non-lethal age estimation of a tropical reef fish, coral trout Plectropomus leopardus

    225667_225667.pdf (1.120Mb)
    Access Status
    Open access
    Authors
    Hobbs, Jean-Paul
    Frisch, A.
    Mutz, S.
    Ford, B.
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Hobbs, J. and Frisch, A. and Mutz, S. and Ford, B. 2014. Evaluating the effectiveness of teeth and dorsal fin spines for non-lethal age estimation of a tropical reef fish, coral trout Plectropomus leopardus. Journal of Fish Biology. 84: pp. 328-338.
    Source Title
    Journal of Fish Biology
    DOI
    10.1111/jfb.12287
    ISSN
    00221112
    Remarks

    This is the accepted version of an article which has been published in final form as: Hobbs, J. and Frisch, A. and Mutz, S. and Ford, B. 2014. Evaluating the effectiveness of teeth and dorsal fin spines for non-lethal age estimation of a tropical reef fish, coral trout Plectropomus leopardus. Journal of Fish Biology. 84: pp. 328-338. http://doi.org/10.1111/jfb.12287

    URI
    http://hdl.handle.net/20.500.11937/27114
    Collection
    • Curtin Research Publications
    Abstract

    This study investigated whether teeth and dorsal fin spines could be used as non-lethal methods ofage estimation for a vulnerable and highly valued tropical fisheries species, coral trout Plectropomus leopardus. Age estimation of individuals from 2 to 9 years old revealed that dorsal spines represent an accurate ageing method (90% agreement with otoliths) that was more precise [average per cent error (APE)=4·1, coefficient of variation (c.v.)=5·8%] than otoliths (APE = 6·2, c.v. = 8·7%). Of the three methods for age estimation (otoliths, dorsal spines and teeth), spines were the most time and cost efficient. An aquarium-based study also found that removing a dorsal spine or tooth did not affect survivorship or growth of P. leopardus. No annuli were visible in teeth despite taking transverse and longitudinal sections throughout the tooth and trialling several different laboratory methods. Although teeth may not be suitable for estimating age of P. leopardus, dorsal spines appear to be an acceptably accurate, precise and efficient method for non-lethal ageing of individuals from 2 to 9 years old in this tropical species.

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