Influence of Hansenula anomala yeast intake on the liver and kidney metabolism of the trout (Salmo gairdneri).

The nutritional and metabolic effects of the use of Hansenula anomala yeast as the only protein source were studied in the trout. Food intake, weight and length increments significantly decreased in trout fed on yeast diet. Hepatosomatic index did not suffer any change. Soluble protein content in liver and kidney rose significantly. Liver alkaline phosphatase activity increased significantly. Liver lactate dehydrogenase (LDH) activity did not change in the experimental conditions. Glutamic-oxalacetic transaminase (GOT) activity appeared as the most affected parameter in both organs, increasing significantly in those trout fed on yeast diet.