The effect of different level of lipid on growth performance and chemical composition of juvenile oriental river prawn Macrobrachium nipponense (De Haan, 1849)

A 60 day trial was conducted in order to determine optimum level of lipid for oriental river prawn. 5 treatments containing 0, 3, 6, 9 and 12% lipid added to diets with iso protein (40%) were formulated. Juvenile prawns with initial average weight of 0.967 g were randomly stocked between 15 glass aquariums. The juvenile prawns were fed at satiation in three times (8, 12 and 18 hrs). Growth performances in the term of average weight (WG), survival rate (SR), food conversion ratio (FCR), condition factor (CF), lipid productive value (LPV), specific growth rate (SGR) and protein efficiency ratio (PER) were evaluated. Generally, the best growth performances were at 9% lipid added diet (i.e. 11.27) and were significant with others (P < 0.05). With increasing lipid in diets, the moisture was decreasing while lipid was moderately increased. In spite of the diets being iso protein, the body protein was increased in treatments 9 and 12%.