Crab species precocity is a large part of the crab species produced in the year, usually more than 20 grams, the gonads have matured, and the crabs cultivated with commercial crabs, the mortality rate as high as 60-90%. About 20% of the crab species cultivated in ponds reached precocious puberty.
Identification of precocious crab species, one is to look at female abdomen, male crab changes in the transfer device. If the abdomen of a female crab has become a umbilicus and the male crab-transformer becomes a rigid, osteogenic tubular body, sexual maturity is indicated. The second is to see if the male chelonian villus is dense and long and dark in color. If this criterion is met, it indicates that the gonads are mature. Look at the color of the crab head breastplate and the crab pattern. The back color of the normal crab head breastplate is light yellow, while the back of the sexually mature crab species is dark green or blue; the sinking crab species is relatively flat on the back, and the undulations are not obvious, whereas the precocious crab species have uneven backs. The fourth is to look at the gonadal development of crab species, open the head of the crab thoracic, such as the liver area to see two purple strips, and there are eggs, or there are two white mass that is the testis, then the gonad has been mature. If only the orange liver is seen, the gonads are immature.
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