Performance of freshwater prawn under carp polyculture system in farm ponds in Sivaganga district, Tamil Nadu

Frontline demonstrations (FLDs) were carried out at 5 farmers’ farm ponds in Sivaganga district, Tamil Nadu to study the performance of freshwater prawn under carp polyculture system. Results revealed that survival rate was higher in treatment ponds and during the 6 months culture period catla, rohu and prawn grew to a size of 525, 450 and 44 g respectively. FLD farm ponds of 0.1 ha recorded higher fish yield of 147.00, 53.32 and 67.76 kg of catla, rohu and prawn respectively in comparison to control pond which recorded 129.60, 78.75 and 27.60 kg of catla, rohu and prawn respectively. Under FLDs farmers could realize a net return of Rs 1,74,332/ha with a benefit-cost ratio of 2.29.