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鱼类生活在水中,因环境影响和生活要求,在一定时间、季节条件下,集群由一处出发沿着一定的途径,从一个水域向另一个水域做有规律的游动,这种现象称之为洄游。 洄游的原因是由于鱼类寻求适宜的场所,进行生殖、发育、生长和越冬。鱼类的洄游根据发生的原因按方向可分为向陆洄游、远陆洄游和垂直洄游。按性质可分为生殖洄游、索饵洄游和越冬洄游。 生殖洄游就是鱼类到生殖期间,集合成群游向适宜的产卵地
Fish living in the water, due to environmental impact and life requirements, under certain conditions of time and season, the cluster from a starting point along a certain way, from one waters to another to do regular swimming, this phenomenon said It is migratory. The reason for migration is due to the fish seeking suitable places for reproduction, development, growth and wintering. According to the reasons for the occurrence of fish migration can be divided into the direction of migratory, far-migratory and vertical migration. By nature can be divided into reproductive migratory, bait migration and migratory winter migration. Reproductive migration is the fish to reproductive period, the group gathered to swim to the appropriate spawning grounds