Effect Evaluation of Gymnocypris Przewalskii Enhancement Release from 2002 to 2023
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.
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