水生生物学报2025，Vol.49Issue(10)：36-45,10.DOI:10.3724/1000-3207.2025.2024.0488
溪洛渡-向家坝梯级水库生态调度对长江上游江津江段四大家鱼繁殖的影响
ECOLOGICAL SCHEDULING OF XILUODU-XIANGJIABA CASCADE RESER-VOIRS ON THE REPRODUCTION OF THE FOUR MAJOR CHINESE CARPS IN THE JIANGJIN SECTION OF THE UPPER YANGTZE RIVER
摘要
Abstract
To mitigate the negative effects of hydropower operation on fish reproduction in the downstream river and maximize reservoir ecological benefits,the Xiluodu-Xiangjiaba joint ecological scheduling has been implemented since 2017.Based on early resource survey data from the Jiangjin section of the upper Yangtze River from 2017 to 2022,this study evaluates the effects of cascade reservoir joint ecological scheduling on the natural spawning of the four major Chinese carps in the downstream river section and identifies key hydrological indicators that affect the natural spawn-ing of the four major Chinese carps.The results showed that the total egg production of four major Chinese carps in the Jiangjin section ranged from 42 to 401 million from 2017 to 2022,exhibiting a general fluctuating trend with a peak of approximately 401 million in 2022.Over the six-year period,25 spawning peaks were observed,mainly concentrated from early June to early July.During ecological scheduling periods,the egg runoff volumes ranged from 0.001 to 108.8 million,accounting for 0.06%to 34.47%of annual totals-exceeding 30%in 2022 and 10%in 2018.In terms of ecologi-cal scheduling effectiveness,the breeding peak period that coincided with ecological scheduling accounted for 16%of the total breeding peak period,indicating that ecological scheduling effectively promoted the natural breeding activities in the downstream Jiangjin section.Hydrological demand analysis showed that the suitable flow range for spawning of the four major Chinese carps in the Jiangjin section was 6000-15000 m3/s,with a suitable water temperature of 21-23℃.Correlation analysis further demonstrated that spawning amount had a significant positive correlation with the peak flow,flow increment,and flow increase rate(P<0.05).Based on these results,the study recommends conduct-ing 2-3 ecological scheduling events in mid-late May and early June,maintaining rising water conditions in the Jiangjin section for more than 3d,and ensuring a daily fiow increase rate of at least 900 m3/s to facilitate the large-scale reproduction.The results provide a scientific basis for formulating scheduling strategies for the Jinsha River cascade reservoir system.关键词
梯级水库/自然繁殖/联合生态调度/四大家鱼/水文指标Key words
Cascade reservoirs/Natural propagation/Joint ecological scheduling/Four major Chinese carps/Hydrolo-gical index分类
农业科技引用本文复制引用
姜伟,田辉伍,蒲艳,邓华堂,俞立雄,杨浩,戴凌全,李莎,段辛斌,刘璇..溪洛渡-向家坝梯级水库生态调度对长江上游江津江段四大家鱼繁殖的影响[J].水生生物学报,2025,49(10):36-45,10.基金项目
中国长江三峡集团公司项目(202303297) （202303297）
国家自然科学基金联合基金(U2240214) （U2240214）
中国水产科学研究院创新团队项目(2020TD09) （2020TD09）
中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金(YFI202402)资助Supported by the Project of China Three Gorges Corporation(202303297) （YFI202402）
National Natural Science Foundation of China Joint Foundation Program(U2240214) （U2240214）
The Innovation Team Project of Chinese Academy of Fishery Sciences(2020TD09) （2020TD09）
Central Public Interest Scien-tific Institution Basal Research Fund,CAFS(YFI202402) （YFI202402）
