当前长江中下游的蟹种培育，由于饲养方法失误，往往造成大批一龄蟹种的性早熟（俗称小绿蟹），通常体重在15－35克。目前人工繁殖的蟹苗供应时间比天然苗早15-60天，更有大量的一龄蟹性早熟。性早熟中华绒塑蟹翌年大批死亡，严重影响群众养蟹的经济效益，致使中华绒资蟹上市规 At present, the breeding of crabs in the middle and lower reaches of the Yangtze River often leads to the precocious puberty (commonly known as small green crabs) of a large number of first-age crab species, usually weighing 15-35 g, due to mistakes in breeding methods. At present, artificial propagation of crabs supply time 15-60 days earlier than natural seedlings, but also a large number of one-crab precocious puberty. Precocious crab next year a large number of deaths, a serious impact on the economic benefits of raising crabs, resulting in the listing of Chinese crabs