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随着水产养殖产业结构的不断调整，特种水产品的养殖品种和面积越来越多，尤其是河蟹养殖业更是快速发展，其养殖的面积、产量、效益在逐年提高。但是近２年来，由于早繁蟹苗规模的扩大，仅注重养殖面积、产量的提高，忽视了河蟹的上市规格，致使河蟹养殖效益下滑，有少数养蟹
With the constant adjustment of aquaculture industry structure, the breeding varieties and area of special aquatic products are more and more, especially the crab aquaculture industry is developing rapidly. The area, yield and benefit of aquaculture are increasing year by year. However, in the recent 2 years, due to the expansion of early-crab-raising crab size, only focusing on the cultivation area and output, ignoring the listing requirements of crabs and crabs, the benefits of crab farming have declined, and a few crabs