ASTUDY OF THE RELATIONSHIP BETWEEN LONGITUDINAL CHANGES OF FISH FAUNAAND SEGMENT CLASSIFICATION

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  • 魚類相の縦断方向変化とセグメント区分に関する研究

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A large number of studies have been made on longitudinal changes of fish fauna, however, the relationship with the engineered viewpoint is little known. The purpose of this paper is to investigate relationship between longitudinal changes of fish fauna and segment classification defined from the viewpoint of flood control.<BR>We focused on 15 rivers in Kyushu and run TWINSPAN analysis to divide the fish fauna longitudinally and compared segment classification.<BR>The result of analysis showed that segment classification is largely corresponded with longitudinal changes of fish fauna and the values of longitudinal gradient which is the boundary of longitudinal fish fauna classification are 1/2000, 1/1000 and 1/100.

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