Life history differences between fat and lean morphs of lake charr (Salvelinus namaycush) in Great Slave Lake, Northwest Territories, Canada
作者： Michael J. Hansen , Nancy A. Nate , Louise Chavarie , Andrew M. Muir , Mara S. Zimmerman
DOI: 10.1007/S10750-015-2633-2
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摘要: Life history characteristics (size, age, plumpness, buoyancy, survival, growth, and maturity) were compared between fat lean morphs of lake charr Salvelinus namaycush in Great Slave Lake, Canada, to determine if differences may reflect effects resource polymorphism. Lake sampled using graded-mesh gill nets set three depth strata. Of 236 captured, 122 a morph 114 morph. Males females did not differ from each other any attributes for either or morphs. The averaged 15 mm longer, 481 g heavier, 4.7 years older than the 26% heavier 48% more buoyant at length Survival was 1.7% higher that grew slower annual rate shorter asymptotic Fat matured similar lengths ages. We concluded connection polymorphism life histories versus suggests morph-specific restoration objectives be needed lakes where diversity is considered goal.
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