EFFECTS OF GRAIN DIAMETER OF BOULDERS IN SLOPES ON CLIMBING CHARACTERISTICS OF <i>ANGUILLA JAPONICA</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 建設社会工学科

• KUNISAKI Kouhei

  新日鐵住金株式会社

• TAKEDA Tomohide

  九州工業大学大学院 工学府建設社会工学専攻

• IZUMI Kousuke

  九州工業大学大学院 工学府建設社会工学専攻

Bibliographic Information

Other Title

• 斜面に設置した粗石の粒径がウナギの登坂特性に及ぼす影響
• シャメン ニ セッチ シタ ソセキ ノ リュウケイ ガ ウナギ ノ トウザカ トクセイ ニ オヨボス エイキョウ

Abstract

 Populations of Anguilla japonica have been decreasing in recent years. The reasons of the population decreasing are overfishing of Anguilla japonica, the deterioration of the river environment and so on. However, in the present circumstances, studies on the ecology of eels and fish ladder for eels mostly haven't advanced. Fish ladders for eels have been designed by considering that not only swimming capacity of eels, but also climbing capacity on a slope. In the present study, an investigation on climbing characteristics of Anguilla japonica was conducted under the condition that grain diameter of boulders in slopes are changed at a constant slope. As a result, it was found that climbing success rate is the maximum at 20mm of major axis. Also, Anguilla japonica climbed while using boulders by serpentine movement, and the averaged climbing speed has been decreasing with the increase of major axis.

Journal

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

  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 73 (7), III_345-III_350, 2017

  Japan Society of Civil Engineers

Keywords

• Anguilla japonica
• slope
• boulder
• grain diameter
• climbing
• fish ladder for eels

Details

• CRID: 1390001205359554048
• NII Article ID: 130006602868
• NII Article ID: 120006492527
• ISSN: 13415115
• ISSN: 21856648
• DOI: 10.2208/jscejer.73.iii_345
• HANDLE: 10228/00006867
• NDL BIB ID: 032622190
• Web Site: https://kyutech.repo.nii.ac.jp/records/5656
• Web Site: http://id.ndl.go.jp/bib/032622190
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I032622190
• Web Site: https://www.jstage.jst.go.jp/article/jscejer/73/7/73_III_345/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed