Alternative oils in cod diet: Effect on fish performance

A study was conducted to investigate the effect of different sources of feed oils in the diet for cod. During the experiment we tested four types of feed. The content of protein (53%) and starch (8.5%) were the same in all four diets, while fat percentages FORO diet 19.1 %, SO-L diet 17.8 %, SO-H 17.2 %, FO 20.2 % and the type of oils was different in all dietary groups.Particular, focus was given to evaluate the different type of oils used; a rapeseed oil/fish oil blend (FORO), salmon oil of low quality (SO-L), salmon oil of high quality (SO-H) and normal fish oil (FO). We wanted to evaluate how the different oils affected the growth performance, the lipid and fatty acids composition of the cod liver and health parameters of the experimental fish. In our study, we showed that none of the tested oils had negative effects on growth, feed efficiency and health parameters of the fish, in despite of higher tendencies to peroxidation processes in SO-H and SO-L groups