Entrainment and impingement of juvenile silver perch, Bidyanus bidyanus, and golden perch, Macquaria ambigua, at a fish screen: effect of velocity and light

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    Abstract

    Entrainment and impingement of two non-salmonid species susceptible to entrainment at irrigation diversions, silver perch, Bidyanus bidyanus (Mitchell), and golden perch, Macquaria ambigua (Richardson), were examined at an experimental intake screen in a laboratory flume under a range of velocities and light levels. The presence of an intake screen significantly reduced entrainment, in some cases reducing mortality from over 90% (unscreened) to less than 2% (when screened). Although some differences in behaviour existed between species, approach velocities (measured 8 cm in front of the screen) up to 0.4 m s-1 effectively reduced entrainment, with very little injury or mortality resulting from incidental screen contacts or impingement. Both species used visual cues to negotiate the screen face, thereby increasing their ability to avoid contact at higher velocities. In the absence of these visual cues, positive rheotactic behaviour was enhanced and fish mostly avoided approaching the screen. These results demonstrate that fish screens operated at approach velocities of up to 0.4 m s-1 have great potential for the protection of silver perch and golden perch juveniles at irrigation intakes.
    Original languageEnglish
    Pages (from-to)362-373
    Number of pages12
    JournalFisheries Management and Ecology
    Volume20
    Issue number4
    DOIs
    Publication statusPublished - Aug 2013

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    Bidyanus bidyanus
    perch
    silver
    entrainment
    visual cue
    fish
    irrigation
    mortality
    Macquaria ambigua
    effect

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    @article{b4ef8bdf5f6d4d82ac37096d8fc44849,
    title = "Entrainment and impingement of juvenile silver perch, Bidyanus bidyanus, and golden perch, Macquaria ambigua, at a fish screen: effect of velocity and light",
    abstract = "Entrainment and impingement of two non-salmonid species susceptible to entrainment at irrigation diversions, silver perch, Bidyanus bidyanus (Mitchell), and golden perch, Macquaria ambigua (Richardson), were examined at an experimental intake screen in a laboratory flume under a range of velocities and light levels. The presence of an intake screen significantly reduced entrainment, in some cases reducing mortality from over 90{\%} (unscreened) to less than 2{\%} (when screened). Although some differences in behaviour existed between species, approach velocities (measured 8 cm in front of the screen) up to 0.4 m s-1 effectively reduced entrainment, with very little injury or mortality resulting from incidental screen contacts or impingement. Both species used visual cues to negotiate the screen face, thereby increasing their ability to avoid contact at higher velocities. In the absence of these visual cues, positive rheotactic behaviour was enhanced and fish mostly avoided approaching the screen. These results demonstrate that fish screens operated at approach velocities of up to 0.4 m s-1 have great potential for the protection of silver perch and golden perch juveniles at irrigation intakes.",
    keywords = "Approach velocity, Intake screen, Irrigation diversion, Murray-Darling Basin",
    author = "C.A. Boys and Lee Baumgartner and M. Lowry",
    note = "Imported on 12 Apr 2017 - DigiTool details were: month (773h) = August; Journal title (773t) = Fisheries Management and Ecology. ISSNs: 0969-997X;",
    year = "2013",
    month = "8",
    doi = "10.1111/fme.12026",
    language = "English",
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    pages = "362--373",
    journal = "Fisheries Management and Ecology",
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    publisher = "Wiley-Blackwell",
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    TY - JOUR

    T1 - Entrainment and impingement of juvenile silver perch, Bidyanus bidyanus, and golden perch, Macquaria ambigua, at a fish screen

    T2 - effect of velocity and light

    AU - Boys, C.A.

    AU - Baumgartner, Lee

    AU - Lowry, M.

    N1 - Imported on 12 Apr 2017 - DigiTool details were: month (773h) = August; Journal title (773t) = Fisheries Management and Ecology. ISSNs: 0969-997X;

    PY - 2013/8

    Y1 - 2013/8

    N2 - Entrainment and impingement of two non-salmonid species susceptible to entrainment at irrigation diversions, silver perch, Bidyanus bidyanus (Mitchell), and golden perch, Macquaria ambigua (Richardson), were examined at an experimental intake screen in a laboratory flume under a range of velocities and light levels. The presence of an intake screen significantly reduced entrainment, in some cases reducing mortality from over 90% (unscreened) to less than 2% (when screened). Although some differences in behaviour existed between species, approach velocities (measured 8 cm in front of the screen) up to 0.4 m s-1 effectively reduced entrainment, with very little injury or mortality resulting from incidental screen contacts or impingement. Both species used visual cues to negotiate the screen face, thereby increasing their ability to avoid contact at higher velocities. In the absence of these visual cues, positive rheotactic behaviour was enhanced and fish mostly avoided approaching the screen. These results demonstrate that fish screens operated at approach velocities of up to 0.4 m s-1 have great potential for the protection of silver perch and golden perch juveniles at irrigation intakes.

    AB - Entrainment and impingement of two non-salmonid species susceptible to entrainment at irrigation diversions, silver perch, Bidyanus bidyanus (Mitchell), and golden perch, Macquaria ambigua (Richardson), were examined at an experimental intake screen in a laboratory flume under a range of velocities and light levels. The presence of an intake screen significantly reduced entrainment, in some cases reducing mortality from over 90% (unscreened) to less than 2% (when screened). Although some differences in behaviour existed between species, approach velocities (measured 8 cm in front of the screen) up to 0.4 m s-1 effectively reduced entrainment, with very little injury or mortality resulting from incidental screen contacts or impingement. Both species used visual cues to negotiate the screen face, thereby increasing their ability to avoid contact at higher velocities. In the absence of these visual cues, positive rheotactic behaviour was enhanced and fish mostly avoided approaching the screen. These results demonstrate that fish screens operated at approach velocities of up to 0.4 m s-1 have great potential for the protection of silver perch and golden perch juveniles at irrigation intakes.

    KW - Approach velocity

    KW - Intake screen

    KW - Irrigation diversion

    KW - Murray-Darling Basin

    U2 - 10.1111/fme.12026

    DO - 10.1111/fme.12026

    M3 - Article

    VL - 20

    SP - 362

    EP - 373

    JO - Fisheries Management and Ecology

    JF - Fisheries Management and Ecology

    SN - 0969-997X

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    ER -