在鱼类人工繁殖特别是四大家鱼人工繁殖过程中,对亲鱼拉网集鱼,性腺发育程度的检查、挑选,催产剂一次或多次注射,人工挤卵受精等一系列操作,极大地损害了亲鱼的健康尤其是十几斤甚至于几十斤重的青、草鲢鳙,活动力不强,造成了催产后亲鱼极高的死亡率,特别是对于培育了多年,性腺才能成熟的亲鱼这样的伤亡是人工繁殖的一大损失。研究证明亲鱼死亡的原因,除体表机械损伤继而细菌感染外,主要是细菌侵入体内所致。注射抗菌药物是提高亲鱼产后成活率,减少死亡的有效途径。因此在家鱼人工繁殖教材或操作技术规程中都明确提到,为提高成活率应对产后亲鱼注射青霉素等抗菌药物,具体剂量 In artificial propagation of fish, especially in the process of artificial reproduction of four major domestic fish, a series of operations, such as inspection and selection of degree of gonad development, one or more injections of oxytocin, and artificial squeezing and egg fertilization, are greatly damaged The health of broodstock, especially a dozen pounds or even a few pounds of heavy green, grass carp and bighead carp, the motility is not strong, resulting in a high mortality rate of broodstock after oxytocin, especially for many years of breeding, gonads to mature broodstock Such casualties are a big loss of artificial reproduction. Studies have shown that the cause of death of broodstock, in addition to mechanical damage after body surface bacterial infection, the main reason is the bacteria invade the body. Antimicrobial drugs injection is to improve the survival rate of broodstock postnatal and effective way to reduce death. Therefore, artificial reproduction of domestic fish teaching materials or technical procedures are clearly mentioned, in order to improve the survival rate of postpartum broodstock injection of penicillin and other antibiotics, the specific dose