Effects of temperature on the fast-start swimming performance of an Australian freshwater fish

Authors

  • J. P. Lyon,

    1. Department of Sustainability and Environment, Arthur Rylah Institute for Environmental Research, Heidelberg, Vic., Australia
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  • T. J. Ryan,

    1. Department of Sustainability and Environment, Arthur Rylah Institute for Environmental Research, Heidelberg, Vic., Australia
    2. PO Box 86, Queenscliff 3225, Vic., Australia
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  • M. P. Scroggie

    1. Department of Sustainability and Environment, Arthur Rylah Institute for Environmental Research, Heidelberg, Vic., Australia
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Jarod Lyon, Department of Sustainability and Environment, Freshwater Ecology Section, Arthur Rylah Institute for Environmental Research, 123 Brown St, Heidelberg 3084, Vic., Australia; e-mail: jarod.lyon@dse.vic.gov.au

Abstract

Abstract –  The fast-start swimming performance of juveniles of an Australian freshwater (warm-water) fish, golden perch, was examined in the laboratory at six water temperatures ranging between 10 and 25 °C. Fast-start swimming performance of fish was considerably reduced at temperatures less than 15.5 °C. Temperatures of less than 15 °C are typical of the thermal regime downstream of large dams in south-eastern Australia, where conditions are more suited to introduced cold-water fish species. We conclude that the swimming performance of native warm-water fish such as golden perch is likely to be negatively affected by cold-water releases from deep outlets in thermally stratified dams.

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