title: Predictability of multispecies competitive interactions in three populations of Atlantic salmon Salmo salar.
abstract: Juvenile Atlantic salmon Salmo salar from three allopatric populations (LaHave, Sebago and Saint-Jean) were placed into artificial streams with combinations of four non-native salmonids: brown trout Salmo trutta, rainbow trout Oncorhynchus mykiss, Chinook salmon Oncorhynchus tshawytscha and coho salmon Oncorhynchus kisutch. Non-additive effects, as evidenced by lower performance than predicted from weighted summed two-species competition trials, were detected for S. salar fork length (LF ) and mass, but not for survival, condition factor or riffle use. These data support emerging theory on niche overlap and species richness as factors that can lead to non-additive competition effects.
authors.affiliation: Department of Biology, University of Western Ontario, London, ON, N6A 5B7, Canada.
authors.forename: A L S
authors.initials: AL
authors.lastname: Houde
authors.forename: C C
authors.initials: CC
authors.lastname: Wilson
authors.forename: B D
authors.initials: BD
authors.lastname: Neff
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D049628:Body Size; D003163:Competitive Behavior; D017684:Oncorhynchus kisutch / Q000502:physiology; D017686:Oncorhynchus mykiss / Q000502:physiology; D011157:Population Dynamics; D020317:Salmo salar / Q000502:physiology*; D012474:Salmon / Q000502:physiology
keywords: additive; growth; non-additive; re-introduction; resources; survival