EVASION BEHAVIOR OF PLECOGLOSSUS ALTIVELIS ALTIVELIS AGAINST AIR BUBBLES IN OPEN-CHANNEL FLOWS

• ONITSUKA Kouki

  Graduate School, Kyushu Institute of Technology University

• AKIYAMA Juichiro

  Graduate School, Kyushu Institute of Technology University

• HIRANO Yoichi

  Graduate School, Kyushu Institute of Technology University

• KASUGAI Keisuke

  Graduate School, Kyushu Institute of Technology University

• FURUSATO Yoshiko

  Kyushu Institute of Technology University

• MOMOTANI Kazuya

  Kyushu Institute of Technology University

Bibliographic Information

Other Title

• 開水路流中の気泡に対するアユの忌避行動
• カイスイロリュウ チュウ ノ キホウ ニ タイスル アユ ノ キヒ コウドウ

Abstract

Fish sometimes enter into an intake gate of weirs and dams, so that a lot of released larval ayu (Plecoglossus altivelis altivelis) are lost. Some techniques with air bubbles, electricity and transmitted light have been developed to avoid fish from the intake gate. However, a lot of fisheries co-operative associations pointed out that the most of such techniques have no effect. It is qualitatively known that fish avoid the area which is included air bubbles. In this study, the air bubbles are injected from the bottom of channel with changing the flow velocity, and trajectories of fish are recorded. It was found that ayu avoid the bubble area with an increase of air quantity. The swimming speed of ayu is decreased in air bubble area. In addition, the increase of the flow velocity is promoted evasion behavior of ayu.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 71 (4), I_1093-I_1098, 2015

  Japan Society of Civil Engineers

Keywords

• air bubbles
• fish behavior
• Plecoglossus altivelis altivelis
• open-channel flow

Details

• CRID: 1390001205352083712
• NII Article ID: 130005123481
• NII Book ID: AN10426673
• ISSN: 18808751
• ISSN: 2185467X
• ISSN: 09167374
• DOI: 10.2208/jscejhe.71.i_1093
• NDL BIB ID: 026352661
• Web Site: http://id.ndl.go.jp/bib/026352661
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026352661
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/71/4/71_183/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed