Efficient food supply is the most important factors which must be considered to introduction of white fish (Rutilus frisii kutum) in an aquaculture system

Therefore, in order to evaluate the effect of dietary protein and zinc on the growth performance and survival of this species, 360 pieces of white fish with an average weight of 0.5 ± 0.56 g were placed in twelve tanks (60 liters) .Juvenile fish was fed with four different levels of protein diets (36 and 44%) and zinc (50 and 200 mg kg feed) for 83 days.

The results showed that the growth and survival of Kutum significantly affected by different levels of protein and dietary zinc.

The highest weight gain (0.79 ± 0.06), percent of  weight gain (154.88 ± 8.7) and specific growth rate (1.13 ± 0.04) were observed in fish which  fed  with a diet containing 44 % protein and 0.005% zinc, But the diet containing 36% protein and 0.02 zinc  96.67 ± 0.00 percent) was revealed the highest survival rate. High With increasing levels of protein in the diet, whole-body protein contents are promoted. Overall, relativity the better response base on growth and body composition was observed in juvenile fish which with fed a diet containing 44% protein and 50 mg per kg zinc.