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Environmental monitoring of mesopelagic ecosystem using marine top predators as an indicator

Research Project

Project/Area Number 17K12813
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Environmental dynamic analysis
Research InstitutionThe University of Tokyo

Principal Investigator

Aoki Kagari  東京大学, 大気海洋研究所, 助教 (60526888)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords海生哺乳類 / 高次捕食者 / 鯨類 / 海洋生態系 / 中深層生態系 / バイオロギング / 肥満度 / 採餌行動 / 採餌生態 / 浮力 / 移動 / 体密度 / マッコウクジラ / ヒレナガゴンドウ / データロガー / コビレゴンドウ / 環境変動
Outline of Final Research Achievements

Behavioral responses and body conditions of marine top predators can be good indicators of environmental changes in marine ecosystem. However, it is challenging to investigate the body conditions of free-ranging whales in the ocean without killing them. In addition, deep-diving toothed whales, that reciprocate between the sea surface and the mesopelagic zone, can be an efficient platform to monitor the surrounding environment. Here we focused on the three topics to establish a method to measure the environmental responses of cetaceans: 1) non-invasive monitoring methods to estimate seasonal changes in body condition of humpback whales at feeding grounds using aerial photogrammetry and tag-derived tissue density, 2) long-term monitoring behaviors of sperm whales and 3) monitoring feeding behavior of toothed whales using animal-born recorders. Our final goal is to establish to monitoring methods of ocean health via the environmental responses of marine top predator as indicators.

Academic Significance and Societal Importance of the Research Achievements

広大な海洋で、動物が変化する環境にどのように応答するのか把握することは難しい。動物に記録計を装着しその行動を記録するバイオロギングは、動物の環境応答を直接計測できる。
また、一部の鯨類ではかつての商業捕鯨により個体数が激減し、さらに近年では海中騒音や漁業による混獲など、人間活動の影響を大きく受ける。海洋生態系のピラミッドを上位から支える役割を持つ高次捕食者が危機的な状況に追い込まれると、その影響が生態系下位の動植物の増減に影響を及ぼし、海洋生態系全体のバランスが崩れ壊滅的な影響を被る恐れがある。海洋の高次捕食者である鯨類の栄養状態や動態を知ることにより、海洋の健全性を評価できると考えられる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (16 results)

All 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 4 results) Book (1 results)

  • [Int'l Joint Research] University of St Andrews(英国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of St Andrews(英国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Breathing patterns indicate cost of exercise during diving and response to experimental sound exposures in long-finned pilot whales2018

    • Author(s)
      Saana Isojunno, Kagari Aoki, Charlotte Cure, Petter Helgevold Kvadsheim and Patrick James O’Malley Miller.
    • Journal Title

      Frontiers in Physiology

      Volume: 9 Pages: 1462-1462

    • DOI

      10.3389/fphys.2018.01462

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Body density of humpback whales (Megaptera novaeangliae) in feeding aggregations estimated from hydrodynamic gliding performance2018

    • Author(s)
      Tomoko Narazaki, Saana Isojunno, Douglas P Nowacek, Rene Swift, Ari S Friedlaender, Christian Ramp, Sophie Smout, Kagari Aoki, Volker B Deecke, Katsufumi Sato, Patrick JO Miller.
    • Journal Title

      PLOS ONE

      Volume: 13 Issue: 7 Pages: 0200287-0200287

    • DOI

      10.1371/journal.pone.0200287

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High diving metabolic rate indicated by high-speed transit to depth in negatively buoyant long-finned pilot whales2017

    • Author(s)
      Aoki Kagari、Sato Katsufumi、Isojunno Saana、Narazaki Tomoko、Miller Patrick J. O.
    • Journal Title

      The Journal of Experimental Biology

      Volume: 220 Issue: 20 Pages: 3802-3811

    • DOI

      10.1242/jeb.158287

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Photogrammetry supports tag-derived tissue density as a proxy for body condition: Seasonal and locational changes in body condition of humpback whales on their feeding grounds.2019

    • Author(s)
      Aoki K, Isojunno S, Charlotte B, Iwata T, Kershaw J, Martin Lopez LM, Ramp C, Biuw M, Akiyama Y, Swift R, Wensveen P, Narazaki T, Sato K, Miller PJO.
    • Organizer
      The 23nd Biennial Conference on the Biology of Marine Mammals, Spain, December 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 採餌海域におけるザトウクジラの行動時間配分と活動様式.2019

    • Author(s)
      秋山優, 赤松友成, Marianne H. Rasmussen, 岩田高志, 青木かがり, Patrick Miller, Martin Biuw, Christian Ramp, 佐藤克文.
    • Organizer
      平成31年度日本水産学会春季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 採餌海域におけるシロナガスクジラの唸り.2019

    • Author(s)
      11)岩田高志,赤松友成,Marianne Rasmussen,Joseph Schnitzler,青木かがり,佐藤克文,Johannes Baltzer,Magnus Wahlberg,Ursula Siebert.
    • Organizer
      日本生態学会第66回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 採餌海域におけるザトウクジラの行動時間配分と活動様式.2019

    • Author(s)
      21)秋山優, 赤松友成, Marianne H. Rasmussen, 岩田高志, 青木かがり, Patrick Miller, Martin Biuw, Christian Ramp, 佐藤克文.
    • Organizer
      平成31年度日本水産学会春季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Does buoyancy affect optimal swim speed? High-speed transits to depth in negatively buoyant long-finned pilot whales2017

    • Author(s)
      Kagari Aoki, Katsufumi Sato, Saana Isojunno, Tomoko Narazaki, Patrick J. O. Miller
    • Organizer
      The 6th International Bio-logging Science Symposium
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Breathing patterns indicate recovery time and exercise modulated diving costs in long-finned pilot whales2017

    • Author(s)
      Saana Isojunno, Kagari Aoki, Patrick Miller.
    • Organizer
      The 6th International Bio-logging Science Symposium
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] A Humpback Whale Utilize Fishing Boats to Foraging on Herring2017

    • Author(s)
      Iwata T., Aoki K., Miller PJO., Biuw M., Williamson M and Sato K
    • Organizer
      The 22nd Biennial Conference on the Biology of Marine Mammals
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] グライド中の加速度から推定した採餌期ザトウクジラの体密度2017

    • Author(s)
      楢﨑友子,Saana Isojunno, Douglas Nowacek, Rene Swift, Ari Friedlaender, Christian Ramp, Sophie Smout, 青木かがり,佐藤克文,Patrick Miller
    • Organizer
      第13回日本バイオロギング研究会シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] 太ったザトウクジラは採餌しない?2017

    • Author(s)
      青木かがり,岩田高志,Joanna Kershaw, Martin Biuw, 秋山優,佐藤克文,Patrick Miller
    • Organizer
      第13回日本バイオロギング研究会シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] ザトウクジラの休息時間はなぜ陸棲大型草食動物のように短いのか2017

    • Author(s)
      秋山優,赤松友成,Marianne H. Rasmussen,岩田高志,楢崎友子, 青木かがり, Patrick Miller, Martin Biuw, 佐藤克文
    • Organizer
      第65回日本生態学会
    • Related Report
      2017 Research-status Report
  • [Book] 旅する動物図鑑③海の生きもの2018

    • Author(s)
      青木かがり他 荒井修亮監修
    • Total Pages
      39
    • Publisher
      筑摩書房
    • ISBN
      4480860886
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2023-01-30  

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