Toxicity of Various Refinery Materials to Fresh Water Fish

Because the killing of fish is the most obvious evidence of injury to aquatic life the toxicity of various chemicals and materials to the fresh water fish commonly known as bluegill sunfish was investigated. The practicial use of the results obtained requires considerable caution because of the influence of local conditions on the toxicity of a specific material to fish. Nevertheless, data obtained from procedures developed afford the best means known at this time for determining probable toxic effects on fish. After permissible concentrations of toxic materials have been determined by bioassay procedures, the more simple and less costly chemical test may be used for control purposes. 5 references, 5 figures, 5 tables.