Studies on temporal water area producing diversity of freshwaterfish: environmental property and function for fish reproduction.

降雨形成的临时水域为某些鱼类提供了重要的繁殖环境。为了掌握临时水域的环境容量和鱼类在临时水域繁殖的生理生态信息，进行了临时水域的环境研究和鱼类的成熟度调查。虽然在一些临时水域的水质中没有观察到明显的特征，但这表明作为鱼类幼虫食物的浮游生物从恒定水域增加。此外，还表明在临时水域繁殖的鱼类繁殖期持续较长（春至秋）。

The temporal water area formed by rainfall provides important breeding environmentfor some fishes. Environmental research of the temporal water area and maturationinvestigation of fishes were conducted for the purpose of grasping the environmentalcapability and the physiological and ecological information of the fishes which breed in the temporal water area. Although the conspicuous feature was not observed in thewater quality of some temporary water areas, it was suggested that the plankton usedas the food for larvae of fish increased from a constant water area. Furthermore, it wassuggested that the breeding period of fish which breeds in the temporal water areacontinues comparatively long (spring to autumn).