在人工孵化过程中,常遇到家鱼卵提前脱膜现象。鱼卵的提早脱膜致使胚胎畸形率增加,孵化率降低,鱼苗成活率低,提前脱膜的因素很多。与鱼卵本身的卵膜质量和水质条件有关,另外如果循环使用孵化用水或将两批发育期相差很远的鱼卵放在同一容器中孵化,也是导致早脱膜的原因之一。因为循环使用的孵化水中含有的孵化酶或是较早一批的鱼胚孵化释放出的孵化酶都会溶解卵膜,引起提早脱膜。为预防鱼卵的早脱膜,可采取如下措施: 1:为确保鱼卵卵膜质量,一般采用每立方米 In the process of artificial hatching, often encounter the phenomenon of early release of fish eggs. Early removal of fish eggs caused embryo abnormality rate increases, hatching rate decreased, the survival rate of fry is low, there are many factors in advance of the release. It is also related to the egg quality and water quality of the eggs themselves. It is also one of the reasons that lead to early release if the hatching water is circulated or two pairs of fish eggs far apart in development period are incubated in the same container. Because hatching enzymes contained in the recycled hatching water or hatching enzymes released by earlier hatching of the fish embryos dissolve the egg membrane, causing premature release. To prevent the early release of fish eggs, take the following measures: 1: In order to ensure the quality of eggs oval, generally used per cubic meter