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  • Contrasting intraspecific dietary shifts in two terapontid assemblages from Australia's wet-dry tropics

    Author(s)
    Davis, Aaron M
    Pusey, Bradley J
    Pearson, Richard G
    Griffith University Author(s)
    Pusey, Bradley J.
    Year published
    2012
    Metadata
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    Abstract
    This study assessed the size-related patterns of dietary resource use in terapontid assemblages from two north Australian wet-dry tropical river systems exhibiting contrasting long-term flow regimes. Substantially higher size-related dietary divergence in the form of additional trophic guilds and lower levels of dietary overlap were evident among terapontids from the comparatively stable Daly River system, particularly during the dry season. Relatively restricted expression of size-related dietary shifts in conjunction with higher levels of dietary overlap and no significant seasonal effects on dietary overlap were features ...
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    This study assessed the size-related patterns of dietary resource use in terapontid assemblages from two north Australian wet-dry tropical river systems exhibiting contrasting long-term flow regimes. Substantially higher size-related dietary divergence in the form of additional trophic guilds and lower levels of dietary overlap were evident among terapontids from the comparatively stable Daly River system, particularly during the dry season. Relatively restricted expression of size-related dietary shifts in conjunction with higher levels of dietary overlap and no significant seasonal effects on dietary overlap were features of assemblage interaction in the highly variable Burdekin River. Results highlight size-related dietary shifts as a complex aspect of terapontid trophic habits, and one that can exhibit considerable spatial dynamism.
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    Journal Title
    Ecology of Freshwater Fish
    Volume
    21
    Issue
    1
    DOI
    https://doi.org/10.1111/j.1600-0633.2011.00521.x
    Subject
    Ecosystem function
    Ecology
    Zoology
    Fisheries sciences
    Publication URI
    http://hdl.handle.net/10072/48697
    Collection
    • Journal articles

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