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Various off-channel habitats along the Chilliwack-Vedder River were monitored during smolt migration in spring. Seven sites including four restored and three natural off-channel habitats were monitored using complete capture weirs located just upstream from their confluences with their parent streams. In 1997, salmonids were enumerated as migrants from these habitats. Their size and weight were sampled and possible factors affecting smolt migration were examined. Numbers of smolts captured of the two target species, coho salmon (Oncorhynchus kisutch) and steelhead trout (O. mykiss), ranged from 284 to 7176 and from 1 to 132, respectively in 1997. Coho smolt abundance from individual sites varied from <2 smolts • 100 m-2 to >50 smolts • 100 m-2. The factors that led to the variability in coho smolt production are complex and unclear. A comparison of observed and predicted coho smolt yield indicated that average biostandard estimates overestimated the numbers of smolts emigrating from the habitats in this study...
Blackwell, C.N., Picard, C.R.; Foy, M.. 1999. Smolt Productivity of Off-channel Habitat in the Chilliwack River Watershed. Ministry of Environment, Lands and Parks; Ministry of Forests. Watershed Restoration Project Report. WRPR14
Topic: Watershed Restoration Program
Keywords: habitat, off-channel, chilliwack-vedder river, restore
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