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家鱼的性腺发育,是随着季节而进行周期变化的。在一年中,家鱼的性腺从进入成熟期直至开始退化前,亲鱼对外源激素具有敏感反应,这个时期称为家鱼的催产期。由于亲鱼的性腺发育,不仅与各地的气侯、水温变化密切相关,而且与亲鱼饲养条件的优劣而有所不同,因而催产期的提前和推后,受许多因素的影响。在亚热带地区家鱼的催产期,往往是始于4月下旬,延至5月下旬或6月上旬。而以5月上、中旬为催产盛期。按农历以立夏前后为催产的好季节,南方可适当提早,北方可适当推迟。总之各地每年选择具体催产日期时,一定要从当地的水温和亲鱼性成熟发育状况出发。催产
Gonadal development of domestic fish, is cyclical changes with the seasons. During the year, the broodstock has a sensitive reaction to exogenous hormones before entering the mature period until the gonads of the fish begin to degenerate. This period is called the period of domestic production of the fish. Due to the gonadal development of broodstock, it is not only closely related to the changes of climate and water temperature in different places, but also different from the breeding conditions of broodstock. Therefore, the advance and postponement of brooding period are affected by many factors. In the subtropical areas of domestic fish during the period of production, often from late April, late May or early June. And in May, mid-term for the period of oxytocin. According to the lunar calendar, before and after the beginning of summer, a good season for oxytocia, the south may be appropriate early, the north may be postponed properly. In short, each year throughout the year to choose a specific oxytocin date, we must start from the local water temperature and maternal sexual maturity status. OTC