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  • Individual variation and repeatability in urinary corticosterone metabolite responses to capture in the cane toad (Rhinella marina)

    Author(s)
    Narayan, Edward
    Molinia, Frank
    Cockrem, John
    Hero, Jean-Marc
    Griffith University Author(s)
    Hero, Jean-Marc
    Narayan, Edward J.
    Cockrem, John
    Year published
    2012
    Metadata
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    Abstract
    Urinary corticosterone metabolite enzyme-immunoassay (EIA) can be used for the non-invasive assessment of baseline levels and corticosterone responses in amphibians. In this study, urinary corticosterone responses of wild male cane toads (Rhinella marina) to confinement and repeated handling were measured to quantify individual variation in corticosterone responses for the first time in an amphibian species. Urine samples were collected at 0 h in the wild, hourly from 2 to 8 h after transfer into captivity, and again at 12 and 24 h in captivity. Toads were then held in captivity and subjected to the same sampling protocol ...
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    Urinary corticosterone metabolite enzyme-immunoassay (EIA) can be used for the non-invasive assessment of baseline levels and corticosterone responses in amphibians. In this study, urinary corticosterone responses of wild male cane toads (Rhinella marina) to confinement and repeated handling were measured to quantify individual variation in corticosterone responses for the first time in an amphibian species. Urine samples were collected at 0 h in the wild, hourly from 2 to 8 h after transfer into captivity, and again at 12 and 24 h in captivity. Toads were then held in captivity and subjected to the same sampling protocol on three occasions at 14 days intervals to quantify variation in corticosterone metabolite responses within and between toads. Baseline and individual corticosterone metabolite responses in male cane toads were generally consistent, with high statistical repeatabilities for 0 h (r = 0.630), 6 h (r = 0.793), 12 h (r = 0.652) and 24 h (r = 0.721) corticosterone metabolite concentrations, and for the total and corrected integrated corticosterone responses (r = 0.567, p = 0.033; r = 0.728, p = 0.014 respectively). Urinary corticosterone responses appear to be a stable, repeatable trait within individuals. Corticosterone responses in amphibians can be more readily measured when urine rather than plasma samples are collected, and the protocol established in the current study can now be applied to the study of variation in corticosterone responses in other amphibians.
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    Journal Title
    General and Comparative Endocrinology
    Volume
    175
    DOI
    https://doi.org/10.1016/j.ygcen.2011.11.023
    Subject
    Biochemistry and Cell Biology not elsewhere classified
    Physiology not elsewhere classified
    Physiology
    Zoology
    Veterinary Sciences
    Publication URI
    http://hdl.handle.net/10072/45838
    Collection
    • Journal articles

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