江苏南京：长江禁渔5年，中华鲟入海率提升约20倍

Core Insights - The implementation of a fishing ban in the Yangtze River has significantly improved the release and survival rates of the Chinese sturgeon, with an increase in marine entry rates by approximately 20 times since the ban began five years ago [1][2]. Group 1: Monitoring and Research - The Nanjing Institute of Geography and Lake Research has reported that the Yangtze River's Jiangsu section has the highest number of monitored Chinese sturgeons, with 54 individuals recaptured in the last two years, excluding the release points in Hubei [1]. - Starting in 2024, the Nanjing Institute will lead systematic monitoring of the Chinese sturgeon in the Jiangsu section, collaborating with the Jiangsu Freshwater Fisheries Research Institute to track migration patterns and health status [2]. - Monitoring data indicates that the sturgeons take an average of 49 days to migrate from release points in Yichang and Jingzhou to the Nanjing section, with an average migration speed of 29.5 kilometers per day [2]. Group 2: Conservation Efforts - The Chinese sturgeon, known for its long maturation period of 18 years, has not been observed to reproduce naturally since 2017, making population recovery challenging [3]. - The increase in marine entry rates and the significant number of monitored sturgeons in the Jiangsu section provide essential scientific support for optimizing release strategies to enhance population recovery [3].