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We collected and summarized data from 30 studies from the literature to assess the effects of stream restoration efforts on densities of salmonid fish and therefore potential production benefits. This synthesis indicates, in general, that stream restoration efforts provide significant increases in the densities of salmonid fish in streams. This was true for both the juveniles of anadromous salmonids (coho salmon, chinook salmon, and steelhead trout) and total numbers of non-anadromous or resident salmonids (brook, brown, cutthroat and rainbow trout). Similarly, the numbers of catchable-sized resident fish (³ 15 cm) also appear to increase significantly after stream rehabilitation. Areas of spawnable gravel tend to increase from restoration efforts which should provide more area for spawning fish. Provided assessments of limited spawning area are accurate, restorations may increase the numbers of anadromous salmonids that spawn but do not rear in streams for extended periods (chum, pink and sockeye salmon)...
Keeley, E.R., Slaney, P.A.; Zaldokas, D.. 1996. Estimates of Production Benefits for Salmonid Fishes from Stream Restoration Initiatives. Ministry of Environment, Lands and Parks. Watershed Restoration Management Report. WRMR04
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