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目前我省大部分鱼种场亲鱼培育采用的是春季强化培育,其他季节只采用一般培育的方式。这样虽然能把亲鱼培育成熟,达到人工繁殖的目的,但亲鱼的有效繁殖力即产卵率、受精率、出苗率均偏低,其实际的产卵量远没有达到亲鱼应有的产卵量。因为亲鱼性腺发育是个渐进的过程,在整个卵细胞的生长发育过程中都要有充足的营养(主要有蛋白质、脂肪、糖类等)。在池养条件下,亲鱼性腺发育所必须的营养主要来自人工投饵或施肥培育的天然饵料,这就要求人们必须按照亲鱼性腺发育规律,坚持常年培育。具体做法可按“产后补偿体力消耗,秋季积累营养,春季性腺大生长”的原则,采取如下措施:
At present, most fish species broodstock breeding in our province is intensive cultivation in spring, and the other seasons only adopt the method of general breeding. Although it can cultivate the broodstock mature, to achieve the purpose of artificial reproduction, but the broodstock effective fertility that spawning rate, fertilization rate, emergence rate are low, the actual fecundity far less than the pro-fish should have the amount of eggs . Because the progenitor gonadal development is a gradual process, in the growth and development of the entire egg cells have adequate nutrition (mainly protein, fat, carbohydrates, etc.). Under the condition of pond raising, the nutrition essential for the gonadal development of the broodstock mainly comes from the natural bait which is artificially fed or fertilized, which requires that one must adhere to the perennial breeding according to the gonadal development of the broodstock. Specific methods can be “postpartum compensation for physical exertion, accumulation of nutrition in the fall, gonad growth in spring” principle, take the following measures: