Culture potential of fresh water giant prawn (Macrobrachium rosenbergii) with tiger shrimp (Penaeus monodon) and green back mullet (Chelon subviridis) in poly culture

Abstract

To investigate the growth and production potentials of freshwater giant prawn (Macrobrachium rosenbergii) in polyculture with tiger shrimp (Penaeus monodon) and green back mullet ( Chelon subviridis) a six month long experiment was conducted in six on-station ponds having an area of 0.1 ha each, with two replications in Brackish water station of Bangladesh Fisheries Research Institute. Overall stocking densities were different in three treatments. Stocking densities of shrimp and mullet were fixed in each treatment and that was 25,000 and 5,000 per hector respectively. Whereas, stocking density of prawn was maintained at 10,000, 15,000 and 20,000 per ha in T1, T2 and T3 respectively. After 90 days of culture final weight of shrimp was highest in T2 (30.77 g) while after 178 days of culture, final weights of prawn (64.73 g) and mullet (29.0 g) were highest in T1 than other treatments. Survival of shrimp (81.59%) and prawn (80.98%) was highest in T2 whereas, survival of mullet (97.67%) was highest in T1 than other treatments. Final weight (64.73 g) of prawn was found significantly (p