保护濒危和重要经济鱼类以及控制入侵鱼类是全世界水利工程的巨大挑战.人们已经认识到流速会影响鱼类在河流中的产卵.但是,目前缺乏可靠的科学支持和相关机制,以综合考虑产卵、受精、孵化、存活等因素,建立流速与鱼类繁殖之间的定量关系.本研究通过实验室控制实验和野外现场实验,量化了流速与家鱼繁殖率之间的关系.结果表明,促发家鱼产卵需要一个最小的速度,并且需要一定的速度范围以维持其产卵过程.但是,实验发现随着流速的增加,家鱼的胚胎孵化和仔鱼发育会受到抑制.综合考虑产卵和孵化以及仔鱼存活需求,本文确定了河流中家鱼繁殖的优化流速过程.该发现对改进水库运行以构建合理、精确的生态流量来调控鱼类繁殖具有重要意义,并在三峡工程应用中取得了有前景的效果.“,”Conservation of endangered or economic fish and control of invasive fish is a great challenge of hydraulic engineering worldwide. Flow velocity has been recognized to affect the spawning of fishes delivering drifting eggs in rivers. However, solid scientific supports and associated mechanisms to establish quan-titative relations between flow velocity and fish reproduction, taking into account spawning, fertilizing, hatching, as well as surviving, are lacking. In this paper, we quantified the relationship between flow velocity and reproduction of Chinese carps through both lab and field experiments. The results showed that a minimum velocity was required to trigger Hypophthalmichthys molitrix (H. molitrix) releasing eggs, and a velocity range was preferred to sustain spawning activity. However, the embryo incubation and lar-vae development of H. molitrix were found to be inhibited with the increase in flow velocity. Considering the requirements of spawning and hatching, as well as larvae surviving, an optimized flow velocity pro-cesses was identified for the reproduction of H. molitrix in rivers. These findings were of great significance to the adaptive operation of reservoirs to create reasonable and precise ecological flows for managing fish reproduction, as shown by the promising results in the engineering application to the Three Gorges Reservoir.