Effect of different level of carbohydrate on growth indices and body composition of oriental river prawn (Macrobrachium nipponense)

In order to improving suitable growing condition for cultured species، knowledge of energy yielding nutrients، especially information about carbohydrate requirement are of oriental river prawn is essential، since there is not exclusive studies about carbohydrate requirement about this species، hence an nutritional experiments was conduct in order to find out the optimum level of carbohydrate. Five treatments with levels 15، 20، 25، 30 and 35 percent with iso- nitrogenous (35%) and iso- lipidic (8. 5%) we formulate each treatment was conducted in triplicate. Two hundred and twenty five juvenile prawn (of size 1. 5±0. 33g) were randomly distributed between 15 aquarium tank of 200 L capacity. The juvenile prawns which fed diet containing 30% carbohydrate were shown optimum condition in growth indices and was significant with other treatments (P < 0. 05>. growth Treatments 2 and 3 (20 and 25%) had not showed any significant differences in growth indices (P≥0. 05). The comparison of mean body chemical comparison of juvenile prawns carcass in tested diets in treatments 1، 2 & 3 had not showed significant differences in the amount of crude protein، lipid، total ash، and moisture (P>0. 05): however، treatments 1 & 5 had higher amount of moisture، with lower amount of protein and lipid value in their body composition (P<0. 05).