Bioreconnaissance in 1980 indicated Dolly Varden char in the Jordan River were below saturation compared to densities sampled in similar BC streams. An experimental fry stocking project was recommended to determine stream-specific carrying capacity. It is doubtful that saturation of selected sites has been achieved to date since viability of released fry has been suspect. Despite fish culture problems, follow-up assessment of 1981 and 1982 fry liberations show increasing densities to 0.25 fry/m2 from 0.03 fry/m2 in 1980. The Peterson Method (Ricker 1971) was used to separate wild and hatchery components in 1982 sampling. Char fry grew an average of 29 mm from date of release to attain a mean length of 72.9 mm (n=86) at recapture (mean = 0.47 mm/day). In order to develop a fish/habitat model capable of predicting maximum stocking density and ultimate production, fry stocking should continue at 1982 release sites until saturation ins assured (i.e., growth rate is not affected).
Russell, J.R.L... 1983. Experimental Dolly Varden Fry Plants in the Jordan River near Revelstoke (1981-1982). Ministry of Environment. Fisheries Report. FRN235
Topic: Fish and Fish Habitats
Keywords: Dolly Varden char, Jordan River, stocking, fry, density, growth, management
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