Extensive feeding on sockeye salmon Oncorhynchus nerka smolts by bull trout Salvelinus confluentus during initial outmigration into a small, unregulated and inland British Columbia river
作者： N. B. Furey , S. G. Hinch , A. G. Lotto , D. A. Beauchamp
DOI: 10.1111/JFB.12567
关键词: Trout 、 Oncorhynchus 、 Fishery 、 Feeding ecology 、 Salvelinus confluentus 、 Biology 、 Predation
摘要: Stomach contents were collected and analysed from 22 bull trout Salvelinus confluentus at the edge of Chilko Lake River in British Columbia, Canada, during spring outmigration sockeye salmonOncorhynchus nerka smolts. Twenty ( >90%) stomachs contained prey items, virtually all identifiable items outmigrant O. smolts stomach represented a large portion (0 ⋅0–12 ⋅6%) estimated S. mass. The results demonstrate nearly exclusive intense feeding by on smolts, support recent telemetry observations high disappearance rates leaving natural lake systems prior to entering high-order unregulated river systems.
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