内蒙古凉城县岱海自1985年移植大银鱼后,产量几起几落。2000年岱海大银鱼产量又创历史新高,产量高达540ｔ,冬季人工采集大银鱼受精卵14亿粒全部投入湖中。根据这几年的研究经验,大银鱼过度高产将破坏湖中的基础饵料,造成产量大幅下降。2001年岱海大银鱼没有形成产量,浮游生 Daihai County, Inner Mongolia Lianghai since 1985, transplanting big silverfish, the output of a few drops. 2000 Daihai silverfish production hit a record high, the output as high as 540t, winter artificial collection 1.4 billion silver carp fertilized eggs all put into the lake. According to the past few years of research experience, excessive production of big whitebait will destroy the basic food in the lake, resulting in a sharp decline in output. Daihai silverfish in 2001 did not form a yield, plankton