我国沿海均有洄游的鳗苗,江淮以南是鳗苗适宜生长的广大地区,苗种资源丰富。及时组织捕捞,做好暂养、运输,提高成活率,对发展鳗鱼人工养殖,扩大外贸出口极为重要。一影响鳗苗溯河的因子鳗苗到达大陆沿岸时,便能匍于海底,白天潜入石缝、草丛、沙中,晚上出来活动,如环境条件合适便上溯到江河。影响鳗苗出现的时间和数量变动的因素有如下几点; Coastal China has migratory eel seedlings, south of Jianghuai eel suitable for growth in vast areas, rich seed resources. Timely organization of fishing, do a good job of keeping, transport, improve survival rate, the development of eel artificial breeding, expanding export is extremely important. A factor affecting the eel seedling upstream of the eel seedlings reach the mainland coast, they can creeping in the sea, sneaking into the crevices, grass, sand in the day and out activities at night, such as the appropriate environmental conditions back to rivers. The factors that affect the time and quantity of eel emergence are the following: