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经过较长的孵化期,甲鱼受精卵完成了胚胎发育。当稚甲鱼行将出壳时,先以卵齿抵破卵壳,然后头和前肢伸出,经4—5分钟的紧张冲击后,则全身脱壳。刚出壳的稚甲鱼腹部的脐孔处残留着尿囊膜、羊膜和浆膜(统称胎膜),带着胎膜的稚甲鱼,从卵壳内爬出后,迅速逃循水中。稚甲鱼腹部还有豌豆大的卵黄囊,尚未完全吸收。在水盆中暂养的稚甲鱼,待卵黄囊吸收、胎膜脱落后,才转入稚甲鱼饲养池喂养。
After a long incubation period, turtles fertilized eggs completed embryonic development. When the juvenile turtle is about to emerge, the eggs first hit the egg shell, then the head and forelimb reach out. After 4-5 minutes of intense impact, the whole body is sheared. Juvenile soft-shelled turtles just leave the umbilicus at the umbilicus, where the allantoic membrane, amniotic membrane and serosal membrane (collectively, the fetal membrane) and the childish turtles with membranes are rapidly removed from the egg shell. Juvenile turtle abalone pea yolk sac, not yet fully absorbed. In the washbasin held in the soft-shelled turtles, until the yolk sac absorption, fetal membranes off, was transferred to the feeding of young turtle feeding ponds.