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为促进产漂流性卵鱼类自然繁殖，2018、2021、2023和2024年汉江中下游实施了4次梯级联合生态调度试验。期间，在钟祥、沙洋、仙桃段开展鱼类早期资源调查，并在兴隆闸下开展鱼类溯流集群情况监测。结果表明：（1）4次生态调度期间共采集鱼卵种类41种（属），其中产漂流性卵鱼类27种（属）；（2）鱼卵总径流量为21.70亿粒，主要产卵区域分布在襄阳至仙桃江段，每年产卵场和产卵规模随水文条件的改变而变化；（3）2018、2021和2024年生态调度水文参数基本符合笔者前期提出的敞泄调度水文控制指标，对产漂流性卵鱼类自然繁殖具有良好的促进作用。
Abstract：To promote the natural reproduction of pelagophilic fish, joint ecological operations of cascaded hydraulic hubs were conducted in the middle and lower reaches of the Hanjiang River in 2018, 2021,2023, and 2024. Surveys of early-life fish resources in the Zhongxiang, Shayang and Xiantao sections and monitoring of upstream fish migration aggregations below Xinglong dam were conducted during the regulation periods. Based on the results, we analyzed the species composition of early-life fish resources, the distribution and scale of spawning grounds, and the ecological effects of joint ecological regulation on reproduction of fish species with drifting eggs. Results show that:(1) A total of 41 fish taxa(species/genera)were identified from the collected eggs, including 27 fish species(genera) with drifting eggs.(2) The total egg flux reached 2.17 billion, with primary spawning grounds distributed in the Xiangyang-Xiantao section. Both spawning grounds and scales varied annually with hydrological conditions.(3) The hydrological parameters during the ecological regulation in 2018, 2021, and 2024 generally met the hydrological control criteria for sluice gate opening(unrestricted discharge operation) proposed by the authors in previous research and effectively promoted the natural reproduction of fish species that produce pelagic eggs.Redundancy analysis(RDA) indicated that the primary factors affecting the average daily egg runoff volume of the four major Chinese carps were water level rise amplitude, duration of water level rise, and the average daily increase in water level, with respective contribution rates of 39.75%, 27.76%, and 10.64%.Among these factors, the average daily egg runoff volume of the four major Chinese carps was significantly correlated with water level rise amplitude, and there were positive correlations with the rate and duration of water level increase.
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基本信息:
DOI：10.15928/j.1674-3075.202505060001
中图分类号:S931.1
引用信息:
[1]雷欢,黄耿,陆俞廷,等.汉江中下游梯级枢纽联合生态调度对产漂流性卵鱼类繁殖的生态效应研究[J].水生态学杂志,2025,46(06):22-34.DOI:10.15928/j.1674-3075.202505060001.
基金信息:
国家重点研发计划课题（2022YFC3202102）; 武汉市知识创新专项（2023020201020301）