性早熟蟹种是指当年生产的个体较大(通常在20g以上),性腺已发育成熟的蟹。用这种蟹种养殖商品蟹,死亡率达60%￣90%。当年池塘培育的蟹种,大约20%达到性早熟。识别性早熟蟹种,一是看雌蟹腹部,雄蟹交接器变化。如雌蟹腹部已成团脐、雄蟹交接器变成坚硬骨质化的管状体,则表明性早 Sexual precocious species of crabs are the larger individuals (usually above 20g) produced in the current year, and mature crabs of the gonads. Crab breeds of commercial crabs with this mortality rate of 60% ~ 90%. Pond nurturing the year crab species, about 20% of sexual precocity. Identification of precocious crab species, one is to see the female crab abdomen, male crab connector changes. If the female crab abdomen has become a group umbilical, male crab connector into a hard bone of the body, it shows that early