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如何加强亲鱼产前培育,获得性状优良的亲鱼,是搞好家鱼人工繁殖的前提。春季随着水温的回升,亲鱼加速了性腺发育,食欲日益旺盛。草、鳊鱼,应逐渐增加青饲料的投喂,减少精饲料。此阶段,草、鳊鱼每日食草量平均为其体重的40％左右。每日精饲料平均为其体重的1—2％,最好能搭配一些大麦芽、稻谷芽。鲢、鳙鱼,主要是经常追肥,保持肥水,以利于水中浮游生物的繁殖生长。培育管理以施肥为主,喂食为辅,中心环节是施肥和调节水质。做到“肥”、“活”、“嫩”、“爽”四个字。“肥”一水质肥沃,浮游生物丰富,易消化的浮游生物种类多。透明度保持在25—40厘米之间。“活”一水色不死滞,随光照和时间
How to strengthen broodstock prenatal breeding, access to good trait broodstock, is to do a good job of artificial reproduction of domestic fish premise. With the spring water temperature rise, broodstock accelerate the development of gonads, appetite is increasingly strong. Grass, anchovy, green feed should be gradually increased, reducing the fine feed. At this stage, grass, catfish daily herbivory average of about 40% of their body weight. The average daily feed concentrate 1-2% of its weight, it is best to mix some barley malt, rice buds. Silver carp, bighead carp, the main is often topdressing, maintaining fertilizer, in order to facilitate the breeding of plankton in water growth. Cultivation and management to fertilize the main feed supplement, the central part is the fertilization and regulation of water quality. Do “fat”, “live”, “tender”, “cool” four words. “Fertilizer” a fertile water, rich plankton, digestible plankton species. Transparency maintained at between 25-40 cm. “Live” a water color is not dead, with the light and time