The purpose of this study was to gain insight into rainbow trout production capabilities of Mission Creek and to assist in development of enhancement alternatives for increasing recruitment to Okanagan Lake. Life history characteristics of rainbow trout in Mission Creek were investigated through reading and back-calculation of both adult and juvenile scales. Thirty-one and 65% of the 1978 trout spawning populations of Mission Creek entered Okanagan Lake as age 1 and age 2 migrants, respectively. A critical minimum size for survival at lake entry appeared to be from 75 to 80 mm, while optimum size for lake survival was from 115 to 125 mm. Percent survival from lake entry to returning adult was estimated at 10% for age 2 migrants and 1.2% for age 1 migrants based on estimated annual production of migrant trout from Mission Creek. Length of residence in Okanagan Lake ranged from 1 to 6 years, averaged 3 years, and was apparently independent of juvenile age and size at time of lake entry. Total age ranged from 2
Sebastian, D.C.. 1979. Life History Characteristics of Mission Creek Rainbow Trout Based on Scale Analysis. Ministry of Environment. Fisheries Management Report. FMR74
Topic: Fish and Fish Habitats
Keywords: rainbow trout, Mission Creek, production, survival, Okanagan Lake, management
Scientific Name: Oncorhynchus mykiss
English Name: Rainbow Trout
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