Published in Scientific Papers. Series D. Animal Science, Vol. LXII, Issue 2
Written by Anca Nicoleta CORDELI (SĂVESCU), Mirela CREŢU, Lucian OPREA
This experiment aimed to determine the optimum dietary protein level for common carp fry (Cyprinus carpio L.), with the average initial body weight of 2,98 g ±0,05 g (W) and the total length of 5,42±1,17mm (TL). The experiment was conducted for 31 days in a recirculating aquaculture system (RAS). The fish were divided into four experimental groups, in duplicate: V1-30% crude protein and 7% lipids, V2-44% crude protein and 22% lipids, V3-45% crude protein and 16% lipids, and V4- 50% crude protein and 14% lipids.Weight gain (WG) and SGR significantly increased (p<0.05) as dietary protein levels increased.Feed conversion recorded the best values at 50% protein diets, the values being considerably lower than those from V1, V2,and V3 variants. Based on the obtained data, it was estimated that the optimal level of protein for fry carps weighing between 2,9 g and 7 g was 50%.
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