George J. Devlin and Phillip W. Bettoli, Tennessee Cooperative Fisheries Research Unit, Tennessee Technological University, Box 5114, Cookeville, TN 38501

Francis C. Fiss, Tennessee Wildlife Resources Agency, PO Box 40747, Nashville, TN 37204

Population characteristics of rainbow trout (Oncorhynchus mykiss) and brown trout (Salmo trutta) stocked into the Caney Fork River below Center Hill Dam in 1997 were investigated. Three cohorts of rainbow trout (N 7,000) and one cohort of brown trout (N = 16,500) were microtagged and stocked during the spring and summer of 1997. The river was sampled monthly by electrofishing to assess the survival, growth, condition, and movement of trout. Electrofishing catch per unit of effort (CPUE) for rainbow trout stocked in March declined linearly (r² = 0.92) and CPUE reached zero within 167 days. The CPUE for rainbow trout stocked in June declined rapidly (r² = 0.93) and approached zero within 102 days. Brown trout stocked in May did not exhibit a decline (r² = 0.07) in CPUE. Early stocked rainbow trout grew faster (13 mm and 21 g/month) than later stocked rainbow trout (8 mm and 5 g/month). Brown trout grew 10 mm and 9 g/month. All tagged cohorts exhibited a decline in condition throughout the study. Brown trout stocked at the lower end of the tailwater exhibited continual upstream movement; rainbow trout displayed little appreciable movement. A mark-recapture experiment in April 1997 estimated that 2,826 brown trout and 4,818 rainbow trout overwintered.