| The purpose of this study is to understanding the characteristics of wintering habitats according to differences in river topography. In addition、 large riverbed stone were used to create wintering habitats.[*][*]The major findings of this study are as follows. [*]1.The characteristics of wintering habitats by the difference of river topography were shown、 in particular、 the existence of boulders in the river channel was verified to be important for the wintering environment of masu salmon.[*]2.The use large sized riverbed materials in the river channel created wintering habitats where ice and snow easily accumulate、 forming cover around these places、 and providing suitable wintering environments for masu salmon for long periods of time. Additionally、 a lot of created wintering habitat maintained the normal state after a flood occurred. |
