千叶县水产试验场内水面分场已实验成功鳗鱼在水槽中产卵。在容积约一吨的水槽中饲养亲鳗,自九月末以来,大约每隔一周对五尾雌亲鳗注射了维生素E,西哪浩灵(防止流产的人体用激素制剂),DES(激素制剂)以及虹鳟鱼的脑下垂体等。结果在1970年12月23日开始发现一尾亲鱼产出游离卵,经查明,另外一尾亲鳗亦达 Chiba Prefecture Fisheries Experimental Field water sub-field experiments have been successful eel spawning in the sink. In a tank of about one ton in volume, the pro-eel is raised. Since late September, about five female eels have been injected with vitamin E approximately once every other week, with Westhorn (hormone-preventing body for abortion), DES ) And rainbow trout pituitary gland and so on. The results in December 23, 1970 began to find a pro-fish production of free eggs, found that the other one eel also reached