||Oklahoma Cooperative Fishery Unit, Stillwater.;Office of Water Resources Research, Washington, D.C.;Robert S. Kerr Environmental Research Lab., Ada, Okla. Treatment and Control Research Program.;Environmental Protection Agency, Washington, D.C. Office of Research and Monitoring.
Part A of the report examines the feasibility of using dried paunch at 10, 20, and 30% levels in feed for pond-rearing yearling channel catfish to market-size, and at a 10% level for cage-culture of yearling catfish. Part B describes the effects of fish culture, using standard feeds and paunch-containing feeds, on water quality of fish ponds. In all, one physical, one bacteriological, and fifteen chemical parameters were measured. Regardless of feed type, pond-reared fish grew faster than the cage-reared fish. There was no significant difference in final weights attained by fish given standard, and 10 and 20% paunch feeds but fish given 30% paunch were significantly smaller. Neither the pond culture nor the cage culture caused deterioration in water quality in any of the ponds to any appreciable degree in one growing season of 24 weeks. (Modified author abstract)