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一、亲鱼培育是关键。亲鱼来源于冬季捕捞的体重在1kg以上的个体,或直接在网箱中选择,雌雄比3:2为宜。培育亲鱼的鱼池水质必须清新,排注水方便,或在网箱中培育。饵料鱼应与亲鱼同时进池,比例为1:1。每2—3周检查一次,及时补充适口的饵料鱼。开春后于4月上旬对亲鱼进行催熟,雌鱼剂量0.5—1mg鱼脑垂体/kg或3—5μgLRH—A/kg,雄鱼减半。条件好的单位如能结合对鱼池进行降水增温、注水保温、流水刺激等生态催熟方法,亲鱼发育会更加理想。
First, broodstock breeding is the key. Broodstock from winter fishing in the weight of more than 1kg individuals, or directly in the cage to choose, male to female ratio of 3: 2 is appropriate. Fish ponds to cultivate broodstock must have fresh water quality, easy watering, or breeding in cages. Fish and fish should be the same time into the pool, a ratio of 1: 1. Check every 2-3 weeks, timely replenishment of bait fish. Early spring in early April after the broodstock ripening, female fish dose 0.5-1mg pituitary gland / kg or 3-5μgLRH-A / kg, male reduced by half. If the conditions of good units such as combining precipitation on the fish pond warming, water insulation, water stimulation and other ecological methods of maturation, broodstock will be more ideal.