期刊
ECOLOGY OF FRESHWATER FISH
卷 13, 期 4, 页码 294-304出版社
WILEY
DOI: 10.1111/j.1600-0633.2004.00071.x
关键词
bull trout; radio telemetry; migration; spawning
Movement and habitat use by bull trout (Salvelinus confluentus) was examined using radio telemetry in the Morice River watershed, north-western British Columbia, between April 2000 and November 2001. Bull trout principally utilised mainstem habitat. Throughout the watershed, little movement was observed during the winter months. From June to September, movement increased and was correlated with migration into tributaries. We directly observed spawning bull trout only in tributaries of the Morice River and never in the mainstem. Many of the fish (N = 48) migrated to the nearest potential spawning sites, but a few fish (N = 7) made extensive migrations to other regions of the watershed to spawn. Fish that spawned in both years of the study returned to the same spawning location. Variation in spatial and movement data, therefore, appears to be linked to availability of suitable habitat and not differences in life history that have been observed in large bull trout.
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