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Construction of acoustic library and species classifier of Japanese bats for acoustic monitoring

Research Project

Project/Area Number 16K00568
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Environmental impact assessment
Research InstitutionThe University of Tokyo

Principal Investigator

Fukui Dai  東京大学, 大学院農学生命科学研究科(農学部), 助教 (60706670)

Co-Investigator(Kenkyū-buntansha) 松井 孝典  大阪大学, 工学研究科, 助教 (30423205)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsコウモリ / エコーロケーション / 種判別 / 音声モニタリング / 音声データベース / エコーロケーションコール / 機械学習
Outline of Final Research Achievements

A bat echolocation call library was constructed by collecting 1,400 reference calls from 30 species. These call files were converted into spectrogram images. By using the Convolutional Neural Network (CNN), we aimed to develop a species classifier that is highly accurate and robust against call variability and noise. The mean correct answer rate was 98.1% in the 10-fold cross validation. As results of test acoustic monitoring conducted in Hokkaido, 169,240 bat calls were detected in June and 296,730 bats in July. The sample size is huge, applying the classifier developed above to these is still in progress.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果から、これまで非効率な捕獲調査に頼らざるを得なかったり、音声モニタリングを行っても種識別が不可能であった地域でも、コウモリ類の種ごとの音声モニタリングが可能になる。これにより、コウモリ類の利用環境調査の効率が飛躍的に向上すると同時に、その情報量も格段と増える。例えば、風力発電施設建設に伴う環境影響評価など、調査の効率化と高精度化が求められているような領域にブレークスルーをもたらし、ひいては野生動物保全と人間活動の共生という、社会的課題の解決に大きな貢献をすることが期待できる。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (13 results)

All 2020 2019 2018 2017 2016

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] Environmental reservoir dynamics predict global infection patterns and population impacts for the fungal disease white-nose syndrome2020

    • Author(s)
      Hoyt Joseph R.、Langwig Kate E.、Sun Keping、Parise Katy L.、Li Aoqiang、Wang Yujuan、Huang Xiaobin、Worledge Lisa、Miller Helen、White J. Paul、Kaarakka Heather M.、Redell Jennifer A.、Gorfl Tamas、Boldogh S?ndor Andr?s、Fukui Dai、et al.
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 117 Issue: 13 Pages: 7255-7262

    • DOI

      10.1073/pnas.1914794117

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Molecular evidence of bird-eating behavior in Nyctalus aviator2019

    • Author(s)
      Heim Olga、Puisto Anna I. E.、Fukui Dai、Vesterinen Eero J.
    • Journal Title

      acta ethologica

      Volume: 22 Issue: 3 Pages: 223-226

    • DOI

      10.1007/s10211-019-00319-5

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Bat species classification by echolocation call using a machine learning system2017

    • Author(s)
      増田 圭祐, 松井 孝典, 福井 大, 福井 健一, 町村 尚
    • Journal Title

      Honyurui Kagaku (Mammalian Science)

      Volume: 57 Issue: 1 Pages: 19-33

    • DOI

      10.11238/mammalianscience.57.19

    • NAID

      130005745600

    • ISSN
      0385-437X, 1881-526X
    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] コウモリ類の音声調査の現状と課題2017

    • Author(s)
      福井 大
    • Journal Title

      JEAS NEWS

      Volume: 154 Pages: 10-11

    • Related Report
      2017 Research-status Report
  • [Journal Article] 機械学習法を用いたエコーロケーションコールによるコウモリの種判別2017

    • Author(s)
      増田 圭祐・松井 孝典・福井 大・福井 健一・町村 尚
    • Journal Title

      哺乳類科学

      Volume: 印刷中

    • NAID

      130005745600

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] 和歌山県におけるコウモリ類の記録2016

    • Author(s)
      福井 大
    • Journal Title

      南紀生物

      Volume: 58 Pages: 162-171

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Presentation] SDGsの目標達成に向けた環境音識別技術の開発 ― 深層学習を用いた日本産コウモリ30種の種判別システムの構築 ―2020

    • Author(s)
      小林啓悟,芳賀智宏,松井孝典,福井大,町村尚
    • Organizer
      聴覚研究会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Effects of forest disturbance on bat assemblages in Japan as revealed by acoustic monitoring.2019

    • Author(s)
      Fukui D. and Matsui T.
    • Organizer
      18th International Bat Research Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of Japanese bat species identification system by echolocation calls using deep learning and evaluation of increasing images by GAN.2019

    • Author(s)
      Kobayashi K., Matsui T., Fukui D.
    • Organizer
      The 6th Annual Meeting of the Society for Bioacoustics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CNNを用いたエコーロケーションコールによる日本産コウモリ類の種判別システムの開発2019

    • Author(s)
      小林 啓悟, 松井 孝典, 福井 大, 町村 尚
    • Organizer
      音学シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Deep Convolutional Neural Networkを用いたコウモリ種判別システムの開発と音声モニタリングへの応用2018

    • Author(s)
      増田圭佑, 松井孝典, 福井大, 町村尚
    • Organizer
      日本生態学会第65回全国大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 畳み込みニューラルネットワークを用いたエコーロケーションコールによるコウモリの種判別2017

    • Author(s)
      増田圭祐・松井孝典・福井 大・町村 尚
    • Organizer
      2017年度人工知能学会全国大会
    • Related Report
      2017 Research-status Report
  • [Book] 生き物と音の事典2019

    • Author(s)
      生物音響学会
    • Total Pages
      464
    • Publisher
      朝倉書店
    • ISBN
      9784254171679
    • Related Report
      2019 Annual Research Report

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Published: 2016-04-21   Modified: 2021-02-19  

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