我们认为 ,搞好河蟹育苗 ,应把好“五关” :1　布卵关　布卵密度要按水质环境、饵料供应及育苗配套设施标准等实际情况确定。生产条件好、设备标准高的育苗室 ,布卵密度可适当提高 ,否则要适当降低。目前的育苗水平是 :从布卵到大眼幼体出池 ,一般育成率为 1 0 %～ 2 5% ,单方 We believe that to improve crab nursery should be a good “five off”: a cloth omen ovulation density according to the water quality and environment, food supply and nursery facilities standards and other practical conditions to determine. Production conditions are good, high standard equipment nursery room, cloth density may be appropriate to increase, otherwise it should be properly reduced. The current level of nursery is: from ovum to ovum larvae out of the pool, the general breeding rate of 10% to 25%, unilateral