抄録
The authors observed a white-spotted chaff Salvelinus leucomaenis redd in a small stream flowing into Lake Shikotsu, Hokkaido. The redd was located in the middle of a riffle with current velocity and average median gravel size being 0.4m/sec and 53mm, respectively. The spawning habitat of the white-spotted charr was different from that of Japanese charr, populations in mainland Japan, reported in the literature.
