随着鱼类养殖事业的迅猛发展,养殖水面不断增加,鱼苗、鱼种的需求量也逐年递增。尤其是苗种不能自给的场户,每年都必须外购一些苗种。在北方,由于气候寒冷,当地产鱼苗要比南方晚1～2个月。为了提早进入生产,每年的春天也需从南方空运鱼苗,以补充当地苗种的不足。苗种运输过程中 With the rapid development of fish farming, the water level of farmed fish is constantly increasing. The demand for fry and fish species also increases year by year. In particular, the field can not be self-sufficient seed, every year must buy some seed. In the north, because of the cold climate, fry on the land is about 1 to 2 months behind the South. In order to get into production early, fish fry are also required to be flown from the south every spring to supplement the lack of local seedlings. Seed in transit