Effects of varying salinities on Lepeophtheirus salmonis survival on juvenile pink and chum salmon

Authors

  • B. M. Connors,

    Corresponding author
    1. * Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6 Canada and Department of Statistics and Actuarial Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6 Canada
      †Tel.: +1 604 202 6051; fax: +1 778 782 3496; email: bconnors@sfu.ca
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  • E. Juarez-Colunga,

    1. * Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6 Canada and Department of Statistics and Actuarial Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6 Canada
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  • L. M. Dill

    1. * Behavioural Ecology Research Group, Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6 Canada and Department of Statistics and Actuarial Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6 Canada
    Search for more papers by this author

†Tel.: +1 604 202 6051; fax: +1 778 782 3496; email: bconnors@sfu.ca

Abstract

Survival of the sea louse Lepeophtheirus salmonis on juvenile Pacific salmon Oncorhynchus gorbuscha and Oncorhynchus keta was examined with respect to salinity (0, 7, 14, 21 and 28). Rapid mortality was observed in fresh water (0) but motile stage sea lice tolerated higher salinities (7, 14, 21 and 28) for up to 7 days. These findings suggest that salinities juvenile Pacific salmon typically encounter during early marine residence have little affect on motile sea louse survival.

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