Effects of different levels of High Unsaturated Fatty Acids (HUFA) on fish growth, Hematocrit and some Biochemical blood parameters in kutum (Rutilus frisii kutum)

A 60 days feeding experiment was carried out on kutum (Rutilus frisii kutum) with 1.21±0.02 g (Mean±SD) to invastigate the effects of different levels of High unsaturated fatty acids (HUFA) on fish growth, hematocrit and some biochemical blood parameters. Six-hundred kutum were randomly distributed between four groups. Fish were fed with diets containing different levels (1.56, 3.26, 6.89 and 6.9 % of total fatty acids) of n-3 HUFA in diet. Weight gain, feed conversion ratio, specific growth rate and survival (%) were not significantly different in treatments (P>0.05). There was no significant difference between hematocrit, plasma protein, glucose and cholesterol contents of dietary treatments (P>0.05). The results of this study showed that diets with a minimum amount of HUFA, had no effect on kutum growth and n-3 HUFA was not a limiting factor in this fish.