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Ecological effects of nighttime artificial lighting on decapod crustaceans

Research Project

Project/Area Number 19K06192
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 40030:Aquatic bioproduction science-related
Research InstitutionKagoshima University

Principal Investigator

Doi Wataru  鹿児島大学, 農水産獣医学域水産学系, 准教授 (70456325)

Co-Investigator(Kenkyū-buntansha) 大富 潤  鹿児島大学, 農水産獣医学域水産学系, 教授 (10253915)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords光害 / オカガニ / 巣穴 / 南西諸島 / 甲殻類 / オカガニ類 / 人工光 / 行動 / 分光視感度特性 / 網膜電図 / 西表島 / 地表活動 / 幼生放出 / 降海移動
Outline of Research at the Start

近年、夜間の人工光が野生動植物に様々な影響を及ぼしていることがわかってきた。夜行性の半陸性甲殻類であるオカガニ類には、人工光の設置によって個体群維持に重要な繁殖行動に変化が起きている可能性が示唆されている。そこで、本研究は、道路照明などがミナミオカガニの生態に対してどのような影響があるのかを明らかにすることを目的に、石垣島・西表島の野外で観察・実験・シミュレーションを3年間で実施する。

Outline of Final Research Achievements

Surveys and experiments were undertaken on Satsuma Peninsula and Amami Oshima Island in Kagoshima Prefecture, as well as on Senagajima, Ishigakijima, and Iriomotejima Islands in Okinawa Prefecture, in order to elucidate the ecological impacts of artificial nocturnal illumination on terrestrial brachyurans. The distribution of the crabs predominantly occurred within natural habitats characterized by minimal nocturnal luminosity. However, on Senagajima Island, burrows were also detected in areas characterized by elevated levels of illumination and traffic. Although these crabs display diurnal activity outside their burrows, their behavior primarily manifests during the nocturnal hours, thereby implicating nocturnal lighting as a potential constraint on their activity.

Academic Significance and Societal Importance of the Research Achievements

夜間の人工照明が野生生物に与える影響は昆虫や鳥類では明らかにされているが、本研究では陸生カニ類に注目した。陸生カニ類は、日中は掘った巣穴の内部に潜み、主に夜間に活動するため、光害の影響を受けやすいと考えられる。実際、ほとんどの調査地において照明付近に巣穴は分布していなかった。南西諸島の陸生甲殻類には希少種も多いため、本研究の成果はそれらの保全にもつながると期待される。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2022 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Mating and burrow plugging behavior of <i>Cardisoma carnifex</i> on the Iriomote-jima Island in Japan2022

    • Author(s)
      Wataru Doi, Ren Kikuchi, Akira Mizutani, Hiroyoshi Kohno
    • Journal Title

      Crustacean Research

      Volume: 51 Issue: 0 Pages: 137-145

    • DOI

      10.18353/crustacea.51.0_137

    • ISSN
      0287-3478, 2189-5317
    • Year and Date
      2022-12-06
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 夜間の人工照明が海岸の甲殻類の繁殖行動に与える影響2020

    • Author(s)
      土井 航
    • Journal Title

      鹿児島大学環境報告書

      Volume: 2020 Pages: 19-20

    • Related Report
      2020 Research-status Report
  • [Journal Article] Reproductive biology of the land crab Epigrapsus politus Heller, 1862 (Brachyura: Gecarcinidae) on Iriomote-jima, Japan2020

    • Author(s)
      Doi Wataru、Itoh Daiki、Kato Shunsuke、Mizutani Akira、Kohno Hiroyoshi
    • Journal Title

      Journal of Crustacean Biology

      Volume: 40 Issue: 2 Pages: 200-208

    • DOI

      10.1093/jcbiol/ruaa003

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 西表島網取湾におけるミナミオカガニの巣穴の利用生態2019

    • Author(s)
      土井 航・中村聡佑・伊藤洸太・水谷 晃・河野裕美
    • Organizer
      日本甲殻類学会第57回大会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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