Spatial dynamics of stream fish populations at a stream network scale in relation to patch mosaic structure of riparian forests

2016 Fiscal Year Final Research Report

• Project/Area Number: 26450197
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Forest science
• Research Institution: Ehime University
• Principal Investigator: Inoue Mikio 愛媛大学, 理工学研究科(理学系), 教授 (10294787)
• Research Collaborator: SUEKUNI Senri ; FUJITA Tomonori ; FUKE Yawara ; OKUYA Takahiro ; GOTO Shota ; ABE Hirofumi ; ICHIMORI Daisuke ; SHINOHARA Takuma
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 渓流魚 / アマゴ / 渓畔林 / 人工林 / 移動分散

Outline of Final Research Achievements

This study examined spatial dynamics of salmonid populations at a whole stream network scale in relation to patch mosaic structure of riparian forests (natural broadleaved forests / conifer plantation). The results illustrated that the distribution of spawning sites was highly heterogeneous, but that of young-of-the-year (YOY) fish became gradually homogenized during summer, owing to their density-dependent dispersal. The results also suggested that, in this process, natural forest patches functioned as a habitat where YOY fish attained higher growth rates.

Free Research Field

河川生態学