Habitat segregation in a salt marsh among adult sticklebacks (Gasterosteidae) |
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Authors: | John P Worgan Gérard J FitzGerald |
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Institution: | (1) Département de biologie, Faculté des sciences et de génie, Université Laval, GIK 7P4 Québec, Canada |
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Abstract: | Synopsis The spatial distribution, seasonal abundance and diel activity of four sticklebacks,Gasterosteus aculeatus, G. wheatlandi, Pungitius pungitius, andApeltes quadracus. coexisting in a St. Lawrence salt marsh were examined to see how these closely related species share their habitat. While all four species breed in the Riviè des Vases, a tidal creek, only three species are found in the adjacent salt marsh pools,A. quadracus being absent. Results are interpreted in terms of avoidance of interspecific competition for space during the relatively short breeding season at this latitude. |
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Keywords: | Diel activity Tidal creek Ruppia pools Gasterosteus aculeatus G wheatlandi Pungitius pungitius Apeltes quadracus Interspecific competition |
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