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How do cetaceans dive for a long time? Approach from cardiac function evaluation

Research Project

Project/Area Number 20K21362
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 42:Veterinary medical science, animal science, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Sakamoto Kentaro  東京大学, 大気海洋研究所, 准教授 (80374627)

Co-Investigator(Kenkyū-buntansha) 青木 かがり  東京大学, 大気海洋研究所, 助教 (60526888)
Project Period (FY) 2020-07-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords心電図 / 鯨類 / 潜水
Outline of Research at the Start

鯨類の潜水能力は哺乳類の中で最大である。潜水中には、心拍数を低下させるなど、何らかの循環器系の調節を行う事で、このような長期間の潜水を可能にしていると考えられている。これまでは水中で遊泳する鯨類の心機能を経時的に計測することが出来なかったため、その生理機能は謎に包まれていた。本研究では潜水を行う鯨類から長期間にわたって心電図計測を行い、鯨類の潜水能力を循環器系制御の側面から解明することを目指す。

Outline of Final Research Achievements

Since it has been difficult to directly observe cetaceans living in the water, the behavior and physiological functions are not fully understood. We conducted a study aimed at clarifying the functions related to the excellent diving ability of cetaceans by the approach of cardiac function evaluation. By attaching an accelerometer and an electrocardiogram recorder to Risso's dolphin, activity and heart rate were measured. From the obtained data, we found diel patterns of activity and heart rate fluctuations.

Academic Significance and Societal Importance of the Research Achievements

鯨類が卓越した潜水能力を持つことは昔から知られていたものの、自由に行動する個体から生理機能に関する知見を得ることが困難であったため、その能力は謎に包まれていた。そこで我々は遊泳時の鯨類から心拍数を計測する新たな計測手法を開発した。本研究では遊泳する鯨類から活動度と心電図を計測し、活動量と心拍数が一日の中で変動することを見出した。本研究で得られた成果は、鯨類の卓越した潜水能力を解明するうえで重要な知見になると期待される。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (9 results)

All 2022 2021

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] A non-invasive system to measure heart rate in hard-shelled sea turtles: potential for field applications2021

    • Author(s)
      Sakamoto Kentaro Q.、Miyayama Masaru、Kinoshita Chihiro、Fukuoka Takuya、Ishihara Takashi、Sato Katsufumi
    • Journal Title

      Philosophical Transactions of the Royal Society B: Biological Sciences

      Volume: 376 Issue: 1830 Pages: 20200222-20200222

    • DOI

      10.1098/rstb.2020.0222

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Towards non-invasive heart rate monitoring in free-ranging cetaceans: a unipolar suction cup tag measured the heart rate of trained Risso's dolphins2021

    • Author(s)
      Aoki Kagari、Watanabe Yurie、Inamori Daiki、Funasaka Noriko、Sakamoto Kentaro Q.
    • Journal Title

      Philosophical Transactions of the Royal Society B: Biological Sciences

      Volume: 376 Issue: 1831 Pages: 20200225-20200225

    • DOI

      10.1098/rstb.2020.0225

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The New Era of Physio-Logging and Their Grand Challenges2021

    • Author(s)
      Fahlman Andreas、Aoki Kagari、Bale Gemma、Brijs Jeroen、Chon Ki H.、Drummond Colin K.、F?re Martin、Manteca Xavier、McDonald Birgitte I.、McKnight J. Chris、Sakamoto Kentaro Q.、Suzuki Ippei、Rivero M. Jordana、Ropert-Coudert Yan、Wisniewska Danuta M.
    • Journal Title

      Frontiers in Physiology

      Volume: 12 Pages: 669158-669158

    • DOI

      10.3389/fphys.2021.669158

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ハナゴンドウの体温・活動量・ 心拍数の日内変動に関する研究2022

    • Author(s)
      阪井紀乃, 福井大祐, 白水博, 渡辺友梨絵, 稲森大樹, 船坂徳子, 青木かがり, 坂本健太郎
    • Organizer
      令和4年度日本水産学会春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Measuring electrocardiograms and heart rates of toothed whales using bio-logging devices2021

    • Author(s)
      Fujiki S, Aoki K, Sakamoto KQ, Inamori D, Watanabe Y, Funasaka N, Sato K
    • Organizer
      The 7th International Bio-Logging Science Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of a non-invasive method for measuring the heart rate of hard-shelled sea turtles swimming freely in the ocean2021

    • Author(s)
      Sakamoto KQ, Kinoshita C, Saito A, Miyayama M, Fukuoka T, Ishihara T, Sato K
    • Organizer
      The 7th International Bio-Logging Science Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Towards non-invasive heart rate monitoring in free-ranging cetaceans: a unipolar suction-cup tag reveals resting heart rate decreases with body mass2021

    • Author(s)
      Aoki K, Fujiki S, Inamori D, Watanabe Y, Funasaka N, Sato K, Sakamoto KQ
    • Organizer
      The 7th International Bio-Logging Science Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ゆっくり泳ぐか?速く泳ぐか?深海へ潜水する鯨類の潜水戦略:バイオメカニクスとスケーリングの視点から.2021

    • Author(s)
      青木かがり, Andreas Fahlman, 鈴木一平, 坂本健太郎, 稲森大樹, 渡辺友梨絵, 船坂徳子, 新妻靖章, 佐藤克文
    • Organizer
      第68回日本生態学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] バイオロギングによる飼育下ハクジラ類の心拍測定:クジラは心拍数を認知的にコントロールしているか?2021

    • Author(s)
      藤木早良, 青木かがり, 坂本健太郎, 稲森大樹, 渡辺友梨絵, 船坂徳子, 佐藤克文
    • Organizer
      第68回日本生態学会
    • Related Report
      2020 Research-status Report

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Published: 2020-08-03   Modified: 2023-01-30  

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