"The compact, freshwater migrations" for the general mechanisms of the fish migrations

我们观察到接吻泥鳅和其他一些淡水鱼从主要河流迁移到洪水地区产卵。这些洪水区是不稳定和短暂的，但是，它们包含很少的水生捕食者和大量的食物适合胚胎/青少年的发展。本研究提供了第一个证据，接吻泥鳅的产卵迁移是由降雨和随后的水位上升，以及新月刺激。由于类似的观察报告下游洄游的鲑鱼，这些刺激可能作为一般线索的鱼类在河流中的迁移。洪水区形成后，吻吻鳅的产卵在时空上受到严格限制。近年来，我们成功地证明了水质的变化直接诱导洄游和产卵行为，这表明某些特定的气味物质可能是环境的近因。

We have observed that kissing loach and some other freshwater fishes migrate from the main stream of rivers to spawn in flood areas. These flood areas are unstable and ephemeral, however, they contain few aquatic predators and a large amount of food suitable for the development of embryos/juveniles. The present study provides the first evidence that the spawning migration of kissing loach is stimulated by rainfall and the subsequent rise in water level, as well as the new moon. Since similar observations have been reported for downstream migrations of salmonids, these stimuli may serve as general cues for migrations of fishes in rivers. Furthermore, the spawning of kissing loach is rigidly limited spacio-temporally after the formation of flood areas. Recently we have successfully demonstrated that changes in water quality directly induce migration and spawning behavior, suggesting some particular odoriferous substances may be the environmental proximate factors.