Arnesen P ; Krogdahl A ;

Aquaculture Nutrition vol. 1 (4)   pp. 201-211, 1995

BioMar AS, P.O. Box 2871, Solli, N-0230 Oslo, Norway

Five oat products, whole oats, oat groats, rolled oats, oat meal and oat bran were tested at five inclusion levels. A growth and a digestibility trial were carried out with rainbow trout, Oncorhynchus mykiss (Walbaum), of 100 g initial mean weight. Protein, lipid and ash digestibilities were only marginally affected by dietary oat levels. Dry matter content of faeces was not affected by any of the oat products. Starch digestibility was high and showed no reduction with increased dietary content. Moderate levels of oats increased weight gain (60-170 g/kg), whereas the highest level tested (400 g/kg), appeared to cause a decrease in gain. Fat content in fish showed a slight increase as dietary incorporations of whole oats, oat bran and oat meal increased. Dressed percentage, however, was only marginally decreased. In fish fed whole oat or oat groat, plasma glucose levels increased as oat inclusion increased. Liver glycogen increased with increasing oat level. There were no clear associations between concentrations of pancreatic hormones and level of oat incorporation

Diets ;  Nutritional requirements ;  Growth ;  Carbohydrates ;  Feeding experiments ;  Fish culture ;  Hormones ;  Oncorhynchus mykiss ;