Shrimp growth and production
The average body weight and survival of the shrimp were recorded fortnightly in all the ponds throughout the culture period. Cast net was used to haul a minimum of 100 shrimp randomly to measure the individual weight of shrimp every fortnightly. Four hauls of animals by cast net were used for estimation of survival on and from 45th day to 105th DOC. Health of shrimp and abnormality were recorded during each fortnightly sampling. Average body weight, average daily growth, survival rate, feed conversion and production yield of P. monodon during culture were estimated following the conventional formulae (Hasan et al. 2011).