四、采卵授精: 1.亲鱼暂养:每年初春,在上游河口处,用张网、抬网、拉网捕捞池沼公鱼,经过挑选后,把成熟好的亲鱼暂养在小网箱中,其规格为120×80×80厘米,网目0.8～1.0厘米,每箱可暂养40～50公斤,水面上有浮冰时,要把暂养箱放入深水处。当水温升高时,有条件的可在箱内放些冰块避免亲鱼在箱内自产。 2.用挂网捕捞亲鱼:使用一般密眼白条挂网捕捞,网在水中设置的时间1～1.5小时就要起网一 IV. Oocyte Insemination: 1. Pro-nocturnal feeding: early spring each year, at the upper reaches of the estuary, with a net, net, net fishing pool marsh fish, after selection, the mature broodstock temporarily housed in small cages , Its specifications for the 120 × 80 × 80 cm, mesh 0.8 ~ 1.0 cm, holding 40 to 50 kg per case, floating ice on the surface of the water, the holding tank should be placed in deep water. When the water temperature rises, the conditional can put some ice in the box to avoid broodstock in the box for their own production. 2 with the net fishing broodstock: the use of generally dense white striped fishing nets, the net set in the water for 1 to 1.5 hours will be a net one