金沙江水富段向家坝库区邵女坪库汊人工鱼巢布设效果研究

Study on the effect of artificial fish nest layout in Shaonvping Branch of Xiangjiaba Reservoir in Shuifu Section of Jinsha River

向家坝水电站的建设,给金沙江下游段鱼类的产卵场及栖息地造成了严重破坏,渔业资源日渐衰减。为探索人工鱼巢建设对渔业资源保护的效果,2022年2月至4月在金沙江下游水富段向家坝库区水富邵女坪库汊进行人工鱼巢的布设和效果检测。2022年2月14日~28日开展人工鱼巢布设,3月4日~4月29日进行效果检测。检测结果显示,布设人工鱼巢面积7000 m^(2),产卵5批次,累计1.7亿粒以上,孵化率达到38.9%。3月份产卵量显著高于4月份。该研究结果为电站修建后鱼类多样性保护和重要生境修复措施的制定提供了科学依据。

The construction of Xiangjiaba Hydropower Station has caused serious damage to the spawning ground and habitat of fish in the lower reaches of Jinsha River,and the fishery resources are decreasing day by day.In order to explore the effect of artificial fish nest construction on the protection of fishery resources,the layout and effect testing of artificial fish nests were carried out in Shaonvping Branch of Xiangjiaba Reservoir in the lower Shuifu Section of Jinsha River from February to April 2022.The artificial fish nest will be laid from February 14 to 28,2022,and the effect will be tested from March 4 to April 29,2022.The test results showed that the artificial fish nest area was 7,000 m^(2),spawning 5 batches,accumulating more than 170 million grains,and the hatching rate reached 38.9%.The amount of eggs laid in March was significantly higher than that in April.The results of this study provide a scientific basis for the conservation of fish diversity and the formulation of important habitat restoration measures after the construction of the power station.