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  • Growth dynamics of freshwater crocodiles (Crocodylus johnstoni) in the Lynd River, Queensland

    Author(s)
    Tucker, Anton D
    Limpus, Colin J
    McDonald, Keith R
    McCallum, Hamish I
    Griffith University Author(s)
    McCallum, Hamish
    Year published
    2006
    Metadata
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    Abstract
    We analysed growth models for a population of Australian freshwater crocodiles (Crocodylus johnstoni). Competing growth models were tested with two data sets: individuals of known-age, and growth interval data from capture-recapture records. A von Bertalanffy function provided the best empirical fit of several growth models. The estimated asymptotic lengths (snout-vent length of males = 125.3 cm; females = 97.4 cm) agreed well with average lengths of the ten largest males and females in the population. Sexual size dimorphism in this species resulted from a combination of smaller mean length at maturity for females and a ...
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    We analysed growth models for a population of Australian freshwater crocodiles (Crocodylus johnstoni). Competing growth models were tested with two data sets: individuals of known-age, and growth interval data from capture-recapture records. A von Bertalanffy function provided the best empirical fit of several growth models. The estimated asymptotic lengths (snout-vent length of males = 125.3 cm; females = 97.4 cm) agreed well with average lengths of the ten largest males and females in the population. Sexual size dimorphism in this species resulted from a combination of smaller mean length at maturity for females and a subsequent decline in female growth rate. Size dimorphism may result from individual trade-offs in age v. length at maturity as a consequence of sexual selection.
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    Journal Title
    Australian Journal of Zoology
    Volume
    54
    Issue
    6
    Publisher URI
    http://www.publish.csiro.au/nid/90.htm
    DOI
    https://doi.org/10.1071/ZO06099
    Subject
    Environmental sciences
    Biological sciences
    Agricultural, veterinary and food sciences
    Publication URI
    http://hdl.handle.net/10072/27915
    Collection
    • Journal articles

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