Effects of exotic salmonids on juvenile Atlantic salmon behaviour |
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| Authors: | R J Scott M S Poos D L G Noakes F W H Beamish |
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| Institution: | Department of Zoology, Axelrod Institute of Ichthyology, University of Guelph, Guelph, Ontario, Canada;, Present address: Department of Zoology, University of Toronto, 25 Harbord Street, Toronto, Ontario, Canada M5S 3G5;, Present address: Department of Biology, Faculty of Science, Burapha University, Bang Saen, Chon Buri 20131, Thailand |
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| Abstract: | Abstract – We examined the effects of two salmonid species, chinook salmon ( Oncorhynchus tschwaytscha ) and brown trout ( Salmo trutta ), both exotic species to Lake Ontario, on behaviour and foraging success of juvenile Atlantic salmon ( S. salar ), a native species to Lake Ontario, in an artificial stream. We found that both exotic species have effects on Atlantic salmon behaviour, but that neither had an effect on foraging success. These results may explain why the Atlantic salmon re-introduction programme in Lake Ontario has had little success, as more than 3 million exotic salmonids are released in Lake Ontario streams annually. |
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| Keywords: | chinook salmon brown trout competition foraging behaviour agonistic artificial stream juvenile native biodiversity |
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