Graduate School of Env.Science / Faculty of Env.Earth Science
A research team of Assoc. Prof. Itsuro Koizumi and his graduate students (Division of Biosphere Science) revealed that, in winter, more than 10,000 juvenile fishes that include species not only with high swimming ability (Japanese dace and non-native rainbow trout) but also with low swimming ability (Siberian stone loach) immigrated to a small stream that had once dried up in summer. This result suggests that apparently negligible stream may provide critical overwintering habitats for some fishes. This research outcome is published in Ichthyological Research, an academic journal of the Ichthyological Society of Japan.
Please visit links below to view the press release (Japanese version only).
Research Press Release (PDF)
Graduate School of Environmental Sceince, Hokkaido University