Fish fauna of Outaki stream of the Kiso River in central Nagano prefecture [Japan]
2005
Kitano, S.(Nagano-ken. Nature Conservation Research Inst. (Japan)) | Yagyu, M. | Akiyama, H. | Kobayashi, S. | Ichikawa, H. | Endo, S. | Yamamoto, S.
Freshwater fish fauna of upper Outaki stream, a tributary of the Kiso River running through the western Nagano prefecture, was surveyed by electrofishing on August and October, 2004. A total of 285 individuals (6 species) were captured at the 7 sites located on 1,000-1,480 m in altitude around the Miure Dam, where fewer species were distributed at higher sites. The fish assemblages were characterized by fluvial salmonid fish in the upper reach, and stream loach or cyprinid fish in middle or lower reaches. Spawning season of White-spotted charr in the Hondani stream was around mid-October. They attained sexual maturity at over 20 cm in fork length.
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