Steelhead trout fry (Salmo gairdneri) were stocked in a small steep tributary of the Keogh River of Vancouver Island. Fry were dispersed manually throughout two fishless reaches of the stream at an initial size of 0.3 g and densities of 0.45/m2 (Reach C and D, 1978), 0.35/m2 (Reach D, 1979) and 1.1/m2 (Reach C, 1979). Survival, dispersal, growth and production were determined for ca. 1 1/2 years for the 1978 brood and to the end of the first summer for the 1979 brood. Standing crop for the two-year classes (0+ and 1+) was estimated from a repeated mark and recapture census and ranged from 36 kg/ha (low density stocking in 1978 and 1979) to 62 kg/ha (high density stocking in 1979), similar to sympatric populations of juvenile salmonids in other streams of Vancouver Island. Stocking to a maximum of 1.10 fry/m2 did not significantly affect survival during the three months of evaluations, but growth rate of the high density group was reduced markedly compared to fry stocked at 0.35 to 0.48/m2. Growth of parr (age
Slaney, P.A, Billings, S.J.; Smith, H.A.. 1980. Experimental Stocking of Steelhead Fry Above Barriers in a High Gradient Tributary of the Keogh River: Progress 1978 and 1979. Ministry of Environment. Fisheries Technical Circular. FTC48
Topic: Fish and Fish Habitats
Keywords: steelhead, Salmo gairdneri, fry, stocking, Keogh River, survival, growth, dispersal, production, standing crop, barriers, O'Connor Creek, management
Scientific Name: Oncorhynchus mykiss
English Name: Rainbow Trout
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