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The effect of sea lice (Lepeophtheirus salmonis) on juvenile pink salmon (Oncorhynchus gorbuscha) swimming endurance

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The swimming endurance of naturally and experimentally infected juvenile pink salmon (Oncorhynchus gorbuscha) was measured to determine the effects of sea lice (Lepeophtheirus salmonis). Salmon naturally infected with adult male and preadult stage lice did not appear to have a reduced swim performance, but when experimentally infected with adult female lice, juvenile salmon showed a reduced ability to swim compared with uninfected control fish, and this effect increased with lice load. A reduced swimming endurance is not only likely to influence predation risk for salmon, but may have other ecological implications, such as slower seaward migration.

Nous avons mesuré l'endurance à la nage de jeunes saumons roses (Oncorhynchus gorbuscha) infectés naturellement et expérimentalement pour mesurer les effets des poux de mer (Lepeophtheirus salmonis). Les saumons infectés naturellement avec des stades adultes mâles et pré-adultes des poux ne semblent pas avoir une performance de nage réduite; par contre, une fois infectés expérimentalement avec des poux adultes femelles, les jeunes saumons affichent une capacité de nage réduite par comparaison aux poissons témoins non infectés et l'effet augmente en fonction de la charge de poux. Une endurance réduite à la nage risque non seulement d'affecter la probabilité de prédation chez les saumons, mais peut avoir d'autres conséquences écologiques, telles qu'une migration plus lente vers la mer.

Document Type: Research Article

Publication date: December 1, 2010

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  • Published continuously since 1901 (under various titles), this monthly journal is the primary publishing vehicle for the multidisciplinary field of aquatic sciences. It publishes perspectives (syntheses, critiques, and re-evaluations), discussions (comments and replies), articles, and rapid communications, relating to current research on cells, organisms, populations, ecosystems, or processes that affect aquatic systems. The journal seeks to amplify, modify, question, or redirect accumulated knowledge in the field of fisheries and aquatic science. Occasional supplements are dedicated to single topics or to proceedings of international symposia.
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