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  • Trophic polymorphism and water clarity in northern Australian Scortum (Pisces: Terapontidae)

    Author(s)
    Davis, AM
    Pusey, BJ
    Griffith University Author(s)
    Pusey, Bradley J.
    Year published
    2010
    Metadata
    Show full item record
    Abstract
    The diets and relative intestinal length of two typically herbivorous terapontid fish from contrasting high and low clarity environments were compared. Fish of both species collected from high clarity habitats were almost exclusively herbivorous, whereas conspecifics from low clarity habitats were omnivores. Relative intestinal lengths in both species were significantly shorter in low clarity environments. Pronounced contrasts in water transparency have the apparent capacity to produce dietary niche shifts in these two species that in turn induce and maintain trophic polymorphisms in a riverine environment.The diets and relative intestinal length of two typically herbivorous terapontid fish from contrasting high and low clarity environments were compared. Fish of both species collected from high clarity habitats were almost exclusively herbivorous, whereas conspecifics from low clarity habitats were omnivores. Relative intestinal lengths in both species were significantly shorter in low clarity environments. Pronounced contrasts in water transparency have the apparent capacity to produce dietary niche shifts in these two species that in turn induce and maintain trophic polymorphisms in a riverine environment.
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    Journal Title
    Ecology of Freshwater Fish
    Volume
    19
    Issue
    4
    DOI
    https://doi.org/10.1111/j.1600-0633.2010.00448.x
    Subject
    Ecology
    Zoology
    Fisheries sciences
    Fisheries sciences not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/37585
    Collection
    • Journal articles

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