عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Using live food is very important to make the best quality in aquaculture. Vitamins in the diet are necessary for survive, growth and reproduction of fish. The necessity of dietary vitamins is related to age, growth rate, physiologic and health parameters and diet combination. This study estimates the enrichment effects of Daphnia magna by Vitamin C, on growth and survival increases in perck fish (Esox Lucius) and gain the best dietary vitamin C dose. For aim to this goal, the perck larvae with initial average weight 0.26 + 0.07 g feed by Daphnia magna without Vitamin C, and different doses of Vitamin C(5% , 15%). The results showed that there were significant differences in average weight and length of different treatments (p <0/05), but no significant differences were observed between different treatments in survival rate (p > 0/05).The most weight and length gain was observed in the treatment which fed enriched Daphnia magna by 5% Vitamin C. Also the most SGR (2.85) and FCR (1.21) were observed in control and the most IWG (42.68), BWG (80.33), WC (1.06) and CF (0.86) were observed in second treatment. Also the results showed that the second treatment (Daphnia magna enriched by 5% Vitamin C) was the best diet for perck larvae.