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8.第一次性成熟的家鱼,为什么催产效果差?第一次性成熟的家鱼,其性腺发育是不整齐的,一部分发育在第四期,一部分尚处于第二期。如果饲养条件良好,其第四期的比例要大些。针对这种情况,催产期要适当地延迟,宜在催产的中期或后期进行,并可适当增加脑垂体的用量和延长第一针与第二针相距的时间。经第一次注射后,自始至终保持微流水,这样有可能得到较好的产卵效果。此外,对来自水库等大水域的家鱼捕起进行催产时,如果采用上述措施,同样可以得到较好
8. The first sexual maturity of the fish, why the poor oxytocin? The first sexual maturity of the fish, the gonadal development is irregular, part of the development in the fourth period, some still in the second period. If the breeding conditions are good, the proportion of the fourth period larger. In view of this situation, the appropriate delay in oxytocin should be carried out in the middle or late oxytocin, and may be appropriate to increase the amount of pituitary and extend the first needle and the second needle away from the time. After the first injection, microfluid is maintained all the time, which may result in better spawning effect. In addition, when catches of domestic fish from large reservoirs such as reservoirs for oxytocin, if the above measures are taken, the same can be obtained