长江水生生物多样性保护
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长江水利委员会组织实施首次中华鲟自然产卵生态调度试验
Shui Li Bu Wang Zhan· 2026-02-27 02:26
Core Insights - The successful ecological scheduling experiment for the Chinese sturgeon marks a significant breakthrough in species protection, transitioning from artificial breeding to natural spawning in the wild [1][2] Group 1: Experiment Overview - The experiment was conducted by the Yangtze River Water Resources Commission in collaboration with the Three Gorges Group, resulting in the collection of approximately 300 fertilized eggs and over 30 fry in the Yanzhiba water area of Yichang, Hubei [1] - The ecological scheduling involved innovative methods such as "open channel diversion + flow pumps + ecological flow supplementation" to create suitable conditions for natural reproduction while balancing multiple demands including water supply, ecology, navigation, and power supply [1] Group 2: Operational Details - From November 25 to December 8, 2025, the Three Gorges and Gezhouba cascade hydropower stations optimized their scheduling plan, increasing the outflow from Gezhouba to 8,000-10,000 cubic meters per second, successfully adjusting the water flow speed in the Yanzhiba test area to the suitable range of 0.5-1.0 meters per second [2] - This experiment not only demonstrated the successful spawning of artificially bred sturgeon in a natural environment but also validated the wild breeding potential of these fish, marking a critical transition in the conservation efforts for the Chinese sturgeon [2] Group 3: Future Directions - The Yangtze River Water Resources Commission plans to continue collaborating with the Three Gorges Group to deepen research on water conditions, temperature, and fish behavior, while optimizing the ecological scheduling experiment for natural spawning [2] - The ongoing efforts aim to enhance the comprehensive benefits of water engineering, strengthen the ecological safety barrier of the Yangtze River, and promote biodiversity protection and ecological restoration in aquatic life [2]
新华全媒头条|长江禁渔五年,发生了哪些变化?
Xin Hua She· 2026-01-08 09:45
Core Viewpoint - The Yangtze River's ten-year fishing ban, initiated on January 1, 2021, has shown significant progress in restoring aquatic biodiversity, improving the livelihoods of fishermen, and maintaining stable management of fishing bans over the past five years [1][2][3]. Group 1: Aquatic Biodiversity Restoration - The Yangtze River, once a cradle of freshwater fisheries, has seen a recovery in aquatic biodiversity due to the fishing ban, with the biological integrity index improving from a historically poor "no fish" level [2][3]. - The population of the Yangtze River dolphin has increased, with the distribution range expanding and the number of dolphins rising from 1,012 in 2017 to a historic recovery [2]. - The monitoring from 2021 to 2024 recorded 344 native fish species, an increase of 36 species compared to the previous monitoring period [3]. Group 2: Fishermen's Transition - The fishing ban has transformed fishermen from being solely reliant on fishing to becoming protectors and entrepreneurs, supported by training and policy measures [4][5]. - In the Bai Shui Port village, all 186 retired fishermen transitioned to new occupations, with collective income reaching 1.01 million yuan in 2025 and per capita income rising from 20,000 yuan in 2019 to nearly 30,000 yuan [4]. - The Ministry of Agriculture and Rural Affairs reported a nearly 100% employment rate for retired fishermen, with many receiving social security benefits [5]. Group 3: Ongoing Challenges - Despite the progress, challenges remain, including the low overall aquatic biodiversity and the continued existence of illegal fishing activities [6][7]. - The biological integrity index is still rated as "poor," and many historically present fish species have not been monitored since the ban [6]. - Illegal fishing has become more organized and covert, complicating enforcement efforts, necessitating enhanced regulatory measures and habitat restoration [7].