Fisheries Research Search Report No.1874, 1979

Michigan Department of Natural Resources
Fisheries Research Search Report No.1874, 1979
Extensive Culture of Walleye Fry in Ponds at the Wolf Lake Hatchery, 1975-1978

George B. Beyerle

Abstract.-Over a 4-year period extensive culture techniques were refined so that walleye fry stocked at the rate of 3. 5 per cubic meter in naturally fertile ponds at Wolf Lake Hatchery could be raised in 6 to 7 weeks to a mean length of 50 mm with a survival of 90% or more. The principal food item for the walleyes during the entire rearing cycle, Daphnia pulex, was maintained best by weekly applications of horse or sheep manure (3 2 ppm) and torula or brewer's yeast (5. 3 ppm). A recommended step-by-step procedure is presented.