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二、池养鲶鱼的人工繁殖 (一)鲶亲鱼的培育 1.亲鱼的来源:一种来源于人工繁殖的鲶鱼,在池塘中培育3年达性成熟,体重0.5～1.5kg以上,体长在30cm以上。另一种来源于江河野生鲶鱼,体表无伤,体质健壮,年龄在4年以上,体重0.75kg～1.5kg的鲶鱼为亲鱼。 2.鲶亲鱼产前培育:亲鱼在5月1日前从越冬池捕出后,进行产前一个月左右的强化培育,随着水温的回升,亲鱼加速生长发育,食欲日益旺盛,投喂含蛋白质35％左右的人工颗粒饲料,投喂量为体重的8％。培育期间最好投喂部分动物性饵料或放养部分野生杂鱼。亲鱼培育池面积1～3亩,水源充足,水质符合渔业水质标准,水深1.5m左右,水温在6℃以上时开始投喂少量的颗
Second, the pond catfish artificial breeding (a) catfish broodstock breeding 1 source of broodstock: a catfish derived from artificial reproduction in the pond for 3 years of sexual maturity, body weight 0.5 ~ 1.5kg or more, body length 30cm above. Another source of wild catfish from the rivers, no injury to the surface, physical fitness, age 4 years, weighing 0.75kg ~ 1.5kg catfish broodstock. 2. Catfish broodstock prenatal breeding: broodstock caught in the overwintering pool before May 1 for about a month prenatal intensive breeding, with the rise of the water temperature, the accelerated growth and development of broodstock, the appetite is growing, fed with protein About 35% of the artificial pellet feed, fed a weight of 8%. During breeding, it is best to feed part of the animal feed or stocking some wild trash fish. Broodstock breeding pool area of 1 to 3 acres, adequate water, water quality in line with the fishery water quality standards, water depth of about 1.5m, when the water temperature above 6 ℃ began to feed a small amount of particles