INFLUENCE OF WALL COLOR ON MIGRATION CHARACTERISTIC OF <i>PLECOGLOSSUS ALTIVELIS ALTIVELIS</i>

• ONITSUKA Kouki

  九州工業大学大学院 建設社会工学研究系

• AKIYAMA Juichiro

  九州工業大学大学院 建設社会工学研究系

• TAKAMATSU Shuhei

  九州工業大学大学院 工学府建設社会工学専攻

Bibliographic Information

Other Title

• 階段式魚道の壁面色がアユの遡上特性に及ぼす影響

Abstract

 Most of fishways installed in Japanese rivers belong to the pool-and-weir fishway type. This fishway is usually made by concrete, so that the color of the pool side-wall and bed are gray. It has been found that ayu (Plecoglossus Altivelis Altivelis)'s evasion color is red, however, preference color has been unknown. In this study, it have been tried to improve migration rate of ayu with the color of sidewall were changed. It was found that most preference color was yellow for ayu. It was found that the migration rate increases by painting upstream sidewall and right bank sidewall in yellow. It's because ayu prefer painted upstream sidewall and right bank sidewall in yellow, and center of fish's school is located nearby upstream notch.

Journal

• Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)

  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 72 (6), II_127-II_132, 2016

  Japan Society of Civil Engineers

Keywords

• pool-and-weir fishway
• color
• fish migration
• ayu

Details

• CRID: 1390282680334559616
• NII Article ID: 130005589398
• DOI: 10.2208/jscejer.72.ii_127
• ISSN: 21856648
• Web Site: https://www.jstage.jst.go.jp/article/jscejer/72/6/72_II_127/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed