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  • Murray cod an apex predator in the Murray River, Australia

    Author(s)
    Ebner, B.
    Griffith University Author(s)
    Ebner, Brendan C.
    Year published
    2006
    Metadata
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    Abstract
    To determine if the Murray cod Maccullochella peelii peelii is an apex predator in the lowland rivers of the Murray-Darling Basin, its feeding ecology was compared with that of the sympatric top predator, golden perch Macquaria ambigua ambigua based on samples supplied by recreational anglers. Diet and prey size were reconstructed from alimentary tract contents of Murray cod (N 젳9) and golden perch (N 젵2), and their feeding morphology was assessed and included calculation of length- gape relationships and relative gut index. Both species fed principally on fish and decapods although Murray cod was the more piscivorous ...
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    To determine if the Murray cod Maccullochella peelii peelii is an apex predator in the lowland rivers of the Murray-Darling Basin, its feeding ecology was compared with that of the sympatric top predator, golden perch Macquaria ambigua ambigua based on samples supplied by recreational anglers. Diet and prey size were reconstructed from alimentary tract contents of Murray cod (N 젳9) and golden perch (N 젵2), and their feeding morphology was assessed and included calculation of length- gape relationships and relative gut index. Both species fed principally on fish and decapods although Murray cod was the more piscivorous (frequency of occurrence 44% versus 6%, total number 50% versus 2%, total weight 90.4% versus 16.0%). Based on reconstructions of prey sizes, fishes up to 1 kg in weight were preyed on by Murray cod, distinguishing it from other top predatory fishes in the Murray-Darling Basin and supporting its classification as an apex predator.
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    Journal Title
    Ecology of Freshwater Fish
    Volume
    15
    Issue
    4
    DOI
    https://doi.org/10.1111/j.1600-0633.2006.00191.x
    Subject
    Freshwater Ecology
    Ecology
    Zoology
    Fisheries Sciences
    Publication URI
    http://hdl.handle.net/10072/28684
    Collection
    • Journal articles

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