ABSTRACT 



Qualitative vitamin requirements of silver salmon ( Oncorhynchus 

 kisutch ) were determined by feeding groups of fingerlings a complete vitamin 

 test diet (casein 54, gelatin 15, com oil 7, cod liver oil 2, dextrin 8, miner- 

 als 4, methionine 1.0, tryptophan 0.5, celluflour plus crystalline vitamins 

 8.5) as the control diet; and deleting one water-soluble vitamin at a some from 

 the ration for the respective deficient lots. A 16 -week feeding period resulted 

 in vitamin deficiency syndromes appearing in thiamine, pyridoxine, folic acid, 

 biotin, pantothenic acid, inositol and choline deficient groups. Nicotinic acid, 

 riboflavin and cyanocobalamine deficient lots gave inconclusive results, and 

 under experimental conditions used no deficiency syndromes were observed 

 for fish without ascorbic acid in the diet. 



