Variation of dietary protein/lipid levels used in postlarvae of freshwater prawn Macrobrachium rosenbergii cultured in a biofloc system

A 70-day experimental trial was performed to evaluate the contribution of biofloc nutrition Macrobrachium rosenbergii 15 days old postlarvae (PL) (average 82.00 ± 19.71 mg) fed different crude protein (P) and lipids (L) levels in zero-water exchange culture tanks. Six treatments (BFT) as diets with 15, 20, or 25% P 5 8% L were managed: BFT-15/5; BFT-15/8; BFT-20/5; BFT-20/8; BFT-25/5; BFT-25/8, a clear-water control without (CW-25/8). The experiment done triplicate 21-60 plastic tanks containing 10 prawns tank-1. At end experiment, survival above 66%, no significant differences among groups (P > 0.05). best growth performance observed maintained BFT-20/5, BFT-20/8, BF-25/5, BFT-25/8 compared < 0.001). feed conversion rate BFT-20/5 significantly lower than that 0.001); efficiency ratio productive value all BFT Results showed it is feasible use low concentrations (20%) (5%) grow giant freshwater prawn PL system. also demonstrated contributes requirements cultured PL, indicated by improved utilization, retention, performance.