Rearing Pacific Salmon In Saltwater Ponds Fertilized With Domestic Wastewater: July-September, 1974

During the summer of 1974, yearling coho salmon (Oncorhynchus kisutch), fingerling chinook salmon (O. tchawystcha), yearling cutthroat trout Salmo clarki), and steelhead trout fry (S. gairdneri) were reared in the system (Experiment VIII). This is the third attempt at summer rearing. Our first experiment in the summer of 1971 was completely unsuccessful, while our second attempt in the summer of 1972 (Experiment III) produced a 4 percent survival of coho fingerlings reared over a 45-day period. The results of warm-weather rearing successfully completed during the summer of 1974 are of major importance to an assessment of the system as an alternate culture method for salmonids to be made at the completion of the 74-75 project year, This data report covers only studies completed during the summer of 1974 (Experiment VIII).