Grid type culture of Portunus trituberculatus in a recirculating aquaculture system

Traditional Portunus trituberculatus culture in pond,isolated net,cage and basket are subject to the natural environment and are characterized by poor controllability,great labor intensity,low yield. In this study,a grid type culture of P. trituberculatus in a recirculating aquaculture system was explored,which have advantages of avoiding cannibolism,sunshade and heat preservation,aeration and decontamination. Crabs at stage of C8-C9 were moved into the grid type recirculating culture system and cultured for 113 days to commercial crab at stage of C11-C12,the carapace breadth and body weight reached to 168 mm and 253 g respectively. And the average yield reached to 3. 054 kg / m2 with survival rate of 75. 4%. Compared to the traditional culture model, the average yield of grid type recirculating culture system has significantly increased.