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(1)人工繁殖。优质的亲鱼是人工繁殖成败的关键。亲本个体重应在10cm以上,在亲鱼培育期间可投喂鲜活饲料,如小杂鱼虾、畜禽内脏等,也可投喂人工配合饲料,要求粗蛋白含量达40％以上。定期冲水,特别是临产前1个月要加大冲水量,增加其流水刺激。当水温适宜时,选择腹部膨大、松软,腹面可看到明显的卵巢轮廓,生殖孔扩张而呈红色的雌鱼,轻压腹部有精液外流的雄鱼进行催产。采用人工授精法时,雌雄比为2∶1;自然产卵
(1) Artificial breeding. High-quality broodstock is the key to the success or failure of artificial breeding. Parents of individual weight should be more than 10cm, in the broodstock breeding period can be fed live feed, such as small trash shrimp, animal offal, etc., but also fed artificial feed, requiring crude protein content of 40% or more. Regular flushing, in particular, one month before labor to increase the amount of flushing, increase its water stimulation. When the water temperature is appropriate, select the abdomen enlargement, soft, ventral surface can be seen obvious outline of the ovary, reproductive gonopore expansion of the red females, light pressure abdomen sperm outflow of male for oxytocin. When using artificial insemination, the ratio of male to female is 2: 1; natural spawning