洄游鱼类 meaning in Chinese

migratory fish

In order to make the fishway design more reasonable and make the fish migration and semi - migration passing the fishway successfully , each country attaches great importance to research of fishway design
为了使鱼道设计更合理，使洄游、半洄游鱼类能顺利通过鱼道，各个国家都很重视鱼道设计的研究。
The main important protected species of water ecosystem of the yellow river should be valuable economic fishes , such as saury and carp and the main protected ecological zones include the wetlands in reservoir area , estuary and channel and water area for sight and recreation
黄河水生态系统中的主要保护物种应是珍贵经济鱼类北方铜鱼、河口洄游鱼类刀鱼、鲤鱼等，主要保护的生态区包括库区湿地、河口湿地、河道湿地以及景观娱乐水域等。