Abstract

Abstract Rainbow trout (Salmo gairdneri) were reared in cages in dugout farm ponds in eastcentral South Dakota during 1982 and 1983 to determine growth and survival, optimal feeding rate and stocking density, and economic feasibility. Trout had 1.9-4.2% daily weight gains and 93-100% survival. The optimal feeding rate was 3-4% of body weight daily. The high cost of fingerlings ($35/100 for 66-g rainbow trout) was the greatest expense in a hypothetical cage-culture operation, but the study demonstrated that an owner of dugout ponds could economically produce a large weight of acceptably sized rainbow trout in a relatively small cage (about 10 m3) over a short time period.

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