2002-2023年青海湖裸鲤增殖放流效果评估

Effect Evaluation of Gymnocypris Przewalskii Enhancement Release from 2002 to 2023

20世纪60-70年代因过度捕捞导致青海湖裸鲤资源量锐减,致使青海湖裸鲤种群结构遭到破坏。虽然1994年起青海省实施封湖育鱼政策,但鱼群自然恢复充满困难。因此,青海湖裸鲤救护中心从2002年开始实施增殖放流活动。文章对2002-2023年青海湖裸鲤增殖放流进行了评估,结果显示青海湖中裸鲤的资源总量从2149万尾、2592吨上升到5.6亿尾、11.4万吨,累计放流青海湖裸鲤原种种苗近2.2亿尾,人工增殖放流对青海湖裸鲤资源恢复的直接贡献率达到26%,增殖放流效果显著。

Overfishing of Gymnocypris Przewalskii in the 1960s and 1970s resulted in a sharp decline in its number.As a result,the population structure of Gymnocypris Przewalskii was destroyed.In 1994,the Qinghai Lake closure policy for fish breeding was implemented,but its recovery was extremely difficult.Therefore,the Gymnocypris Przewalskii Rescue Center started enhancement release activities in 2002.This study evaluated the Gymnocypris Przewalskii enhancement release from 2002 to 2023.The results showed that from 2002 to 2023,the total resources amount of Gymnocypris Przewalskii in Qinghai Lake increased from about 21.49 million and 2592 tons to about 560 million and 114,000 tons.The total number of original Gymnocypris Przewalskii released was nearly 220 million,and the direct contribution rate of artificial enhancement release to the recovery of Gymnocypris Przewalskii resources was 26%.and the effect of enhancement release is remarkable.