Consideration Concerning The Changes in The Form and Environment about Kitadani River

Abstract

Our fishes research conducted on the Kitatani River found that the fish species have been reduced, compared with those around 1955. To determine the reasons for this decrease, we examined changes in the Form and water of the r i ver. As a result, we could speculate some phenomena. In particular, we recognized that changes in the form of the river caused by improvements could adversely affect the fishes. We also understood that changes in water temperature restricts the fishes inhabiting the river.