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2007 Fiscal Year Annual Research Report

ヨウスコウカワイルカ保全のための揚子江全域音響調査

Research Project

Project/Area Number 19405005
Research InstitutionFisheries Research Agency

Principal Investigator

赤松 友成  Fisheries Research Agency, 水産工学研究所・水産情報工学部, 主任研究員 (00344333)

Keywords稀少動物の保全 / 絶滅危惧種 / イルカ / スナメリ / 個体数推定 / 受動的音響手法 / 生物ソナー / エコーロケーション
Research Abstract

平成19年度は、揚江水に生息する小型鯨類の分布域である三峡ダム下流の宜昌市から上海市までの流域1700kmを、動物の発する声をたよりに曳航式水中マイクロホンにより探査し、ヨウスコウカワイルカとスナメリの分布を明らかにすることを目的とした。小型鯨類は水の中で周辺を探索できる生物ソナー音を頻繁に発している。濁った揚水江では、目視調査による動物の発見には限界がある。そこで本研究では、鯨類のソナー音を受信することで広大な揚子江に生息する2種のイルカを探知した。中国揚水江の水位が下がりイルカの発見が容易になる乾期に、ステレオ式水中マイクロホンを曳航し、1kHzから150kHzまでの広い周波数帯域の音波をモニタしながらヨウスコウカワイルカとスナメリの声を探索した。同時に行った目視調査は、米海洋大気庁と中国科学院水生生物研究所の研究者・学生らによって実施された。3名が1チーム構成し、2名が左右両舷に浮上したイルカの種類、頭数、方位、距離を観察し、1名が現場でのデータ打ち込みを担当した。全域調査の結果から、ヨウスコウカワイルカはほぼ絶滅の可能性が示唆された(Turvey, et. al.2007)。一方スナメリについては武漢から南京までの広い範囲でいくつかの密度が濃いホットスポットが同定された(Zhao, et. al.submitted)。なかでも江西省湖口市付近の揚子江本流(八里江口地域)およびその上流側のポーヤン湖に非常に密度の高い水域が存在することを確認した。

  • Research Products

    (22 results)

All 2008 2007 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (14 results) Book (1 results) Remarks (1 results)

  • [Journal Article] First human-caused extinction of a cetacean species?2007

    • Author(s)
      Turvey, S.T., Pitman, R.L. Taylor, B.L., Barlow, J., Akamatsu, T., Barrett, L.A., Zhao, X., Reeves, R.R., Stewart, B.S., Wang, K., Wei,Z., Zhang, X., Pusser, L.T., Richlen, M., Brandon, J.R., and Wang,D.
    • Journal Title

      Biology Letters 3

      Pages: 537-540

    • Peer Reviewed
  • [Journal Article] Indirect evidence of boat avoidance behavior of Yangtze finless porpoises2007

    • Author(s)
      Li, S. Akamatsu, T., Wang, D., et. al.
    • Journal Title

      Bioacoustics The International Journal of Animal Sound and its Recording 17

      Pages: 174-176

    • Peer Reviewed
  • [Journal Article] The ontogeny of echolocation in a Yangtze finless porpoise(Neophocaen a phocaenoides asiaeorientalis)2007

    • Author(s)
      Li,S., Wang, D., Wang,K., Xiao,J., Akamatsu, T.
    • Journal Title

      J. Acoust. Soc. Am. 122

      Pages: 715-718

    • Peer Reviewed
  • [Journal Article] Comparison of echolocation behaviour between coastal and riverine porpoises2007

    • Author(s)
      Akamatsu, T., Teilmann, J., Miller, L.A., Tougaard, J., Dietz, R., Wang, D., Wang, K., Siebert, U., and Naito, Y.
    • Journal Title

      Deep-Sea Research II 54

      Pages: 290-297

    • Peer Reviewed
  • [Journal Article] Echolocation click sounds from wild inshore finless porpoise(Neophocaena phocaenoides sunameri)with comparisons to the sonar of riverine N. p. asiaeorientalis2007

    • Author(s)
      Li,S., Wang, D., Wang,K., Akamatsu, T., Ma., Z., and Han, J.
    • Journal Title

      J. Acoust. Soc. Am. 121

      Pages: 3938-3946

    • Peer Reviewed
  • [Journal Article] 音響観測門によるスナメリの地域的行動観測2007

    • Author(s)
      木村里子,赤松友成,王丁,王克雄,李松海
    • Journal Title

      海洋音響学会誌 34

      Pages: 260-265

    • Peer Reviewed
  • [Presentation] 揚子江全域におけるバイジーとスナメリの音響調査2008

    • Author(s)
      赤松友成, ら
    • Organizer
      日本水産学会春期大会
    • Place of Presentation
      静岡県静岡市
    • Year and Date
      2008-03-28
  • [Presentation] イルカの音響探索能力と行動決定2008

    • Author(s)
      赤松友成
    • Organizer
      日本動物学会関東支部第60回大会招待講演
    • Place of Presentation
      東京都目黒区
    • Year and Date
      2008-03-22
  • [Presentation] Comparison of echolocation behavior between coastal and riverine2007

    • Author(s)
      Akamatsu, et. al.
    • Organizer
      21st Annual Conference of the European Cetacean Society
    • Place of Presentation
      Sansebastian, Spain
    • Year and Date
      20070423-25
  • [Presentation] Probable extinction of the Baiji, Lipotes vexillifer2007

    • Author(s)
      Turvey, et. al.
    • Organizer
      17th biennial conference on the biology of marine mammals
    • Place of Presentation
      Cape town, South Africa
    • Year and Date
      2007-12-03
  • [Presentation] Acoustic survey of baiji and finless porpoises in their historic habitats in the Yangtze River2007

    • Author(s)
      Akamatsu, et. al.
    • Organizer
      17th biennial conference on the biology of marine mammals
    • Place of Presentation
      Cape town, South Africa
    • Year and Date
      2007-12-02
  • [Presentation] Stationary acoustic monitoring of finless porpoises between Poyang Lake and Yangtze River, China2007

    • Author(s)
      Kimura, et. al.
    • Organizer
      17th biennial conference on the biology of marine mammals
    • Place of Presentation
      Cape town, South Africa
    • Year and Date
      2007-12-01
  • [Presentation] Comparison of Dolphin and Bat Sonar: Do Physical and Ecological Constraints Make Them Different?2007

    • Author(s)
      Akamatsu T.
    • Organizer
      17th biennial conference on the biology of marine mammals
    • Place of Presentation
      Cape town, South Africa
    • Year and Date
      2007-11-28
  • [Presentation] Acoustic Monitoring of Small Odontocetes: From Social Behaviour to Abundance Estimation Applicable to African Populations2007

    • Author(s)
      Akamatsu T. and Wang D.
    • Organizer
      17th biennial conference on the biology of marine mammals
    • Place of Presentation
      Cape town, South Africa
    • Year and Date
      2007-11-27
  • [Presentation] Geographic differences of echolocation signals in the finless porpoise2007

    • Author(s)
      Li, et. al.
    • Organizer
      Japan-China Biologging Science Symposium
    • Place of Presentation
      Wuhan, China
    • Year and Date
      2007-11-07
  • [Presentation] Stationary acoustic monitoring of Yangtze finless porpoises at the mouth of poyang lake2007

    • Author(s)
      Dong, et. al.
    • Organizer
      Japan-China Biologging Science Symposium
    • Place of Presentation
      Wuhan, China
    • Year and Date
      2007-11-07
  • [Presentation] Small scale acoustic line transect focusing on hot spots of Yangtze finless porpoises2007

    • Author(s)
      Kimura, et. al.
    • Organizer
      Japan-China Biologging Science Symposium
    • Place of Presentation
      Wuhan, China
    • Year and Date
      2007-11-07
  • [Presentation] Acoustic biologging focusing on small cetaceans in China2007

    • Author(s)
      Wang, et. al.
    • Organizer
      Japan-China Biologging Science Symposium
    • Place of Presentation
      Wuhan, China
    • Year and Date
      2007-11-07
  • [Presentation] 揚子江-ポーヤン湖接続域におけるスナメリモニタリング2007

    • Author(s)
      木村里子, ら
    • Organizer
      第3回日本バイオロギング研究会シンポジウム
    • Place of Presentation
      北海道札幌市
    • Year and Date
      2007-09-08
  • [Presentation] Bilateral bioacoustics research of Chinese freshwater dolphins2007

    • Author(s)
      Akamatsu, et. al.
    • Organizer
      日中ジョイント音響シンポジウム(招待講演)
    • Place of Presentation
      宮城県仙台市
    • Year and Date
      2007-06-05
  • [Book] 分担執筆 章題 Underwater Acoustical Sensing Behavior of Porpoises 書名 Bio-mechanisms of Swimming and Flying2007

    • Author(s)
      Akamatsu,T., Wang,D., Wang,K., and Naito, Y.
    • Total Pages
      403
    • Publisher
      Springer
  • [Remarks]

    • URL

      http://cse.fra.affrc.go.jp/akamatsu/

URL: 

Published: 2010-02-04   Modified: 2016-04-21  

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