Acoustic survey of baiji in their historic habitat of the Yangtze River

2010 Fiscal Year Final Research Report

• Project/Area Number: 19405005
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Resource conservation science
• Research Institution: Fisheries Research Agency
• Principal Investigator: AKAMATSU Tomonari Fisheries Research Agency, 漁業生産・情報工学部, 生物音響技術研究チーム長 (00344333)
• Project Period (FY): 2007 – 2010
• Keywords: 稀少動物の保全 / 絶滅危惧種 / イルカ / スナメリ

Research Abstract

Distribution of endangered freshwater cetaceans was revealed by cutting-edge underwater acoustic technology. Macro scale distribution of cetaceans in the entire Yangtze River and micro scale distribution in a high density area were provided. Historic habitat of baiji and Yangtze finless porpoises were surveyed from Yichang, nearby three gorges dam, to Shanghai, using towing type underwater microphone. Results suggested extinction of baiji and quick reduction of finless porpoises. Log-term stationary acoustic observation had been conducted at the hot spot, high density waters, in the middle of the Yangtze River. Using the outcomes, a model to convert acoustic detection rate to real density of existing number of animals was proposed. Extensive towing acoustic survey was conducted in the same section and provided detail map of distribution of porpoises. In the last year, periodical automatic surveys using a cargo ship as a platform of the acoustic device were conducted from Wuhan to Shanghai, 1100km stretch of the middle and lower reached of the Yanzgter River. This method is cost effective and useful for range-wide monitoring of small odontocetes, which has been applied worldwide in these days.

Research Products

• [Journal Article] Widespread passive acoustic detection of Yangtze finless porpoise using miniature stereo acoustic data-loggers : A review. (2010)
  • Author(s): Li S., Akamatsu T., Dong L., Wang K., Wang D., Kimura S.
  • Journal Title: J.Acoust.Soc.Am. Vol.128 Pages: 1476-1482
  • Peer Reviewed
• [Journal Article] Density estimation of Yangtze finless porpoises using passive acoustic sensors and automated click train detection. (2010)
  • Author(s): Kimura S., Akamatsu T., Li S. Dong S., Dong L., Wang K., Wang D., Arai N.
  • Journal Title: j.Acoust.Soc.Am. Vol.128 Pages: 1435-1445
  • Peer Reviewed
• [Journal Article] Seasonal and diurnal presence of finless porpoises at a corridor to the ocean from their habitat. (2010)
  • Author(s): Akamatsu T., Nakamura, K., Kawabe, R., Furukawa, S., Murata,H., Kawakubo, A., Komaba, M.
  • Journal Title: Marine Biology VOl.157 Pages: 1879-1887
  • Peer Reviewed
• [Journal Article] Scanning sonar of rolling porpoises during prey capture dives. (2010)
  • Author(s): Akamatsu T., Wang D., Wang K, Li S., Dong S.
  • Journal Title: j.Exp.Biol Vol.213 Pages: 146-152
  • Peer Reviewed
• [Journal Article] Detection probability of vocalizing dugongs during playback of conspecific call. (2009)
  • Author(s): Ichikawa, K., Akamatsu T., Shinke, T., Sasamori, K., Miyauchi, Y., Abe, Y., Adulyanukosol, K., Arai, N.
  • Journal Title: j.Acoust.Soc.Am Vol.126 Pages: 1954-1959
  • Peer Reviewed
• [Journal Article] Localization and tracking of phonating finless porpoises using towed stereo acoustic data-loggers. (2009)
  • Author(s): 李松海, 赤松友成, 王丁, 王克雄
  • Journal Title: j.Acoust. Soc. Am Vol.126 Pages: 468-475
  • Peer Reviewed
• [Journal Article] Comparison of stationary acoustic monitoring and visual observation of finless porpoises (Neophocaena phocaenoides). (2009)
  • Author(s): Kimura S., Akamatsu T., Wang K., Wang D., Li S., Dong, S., Arai, N.
  • Journal Title: j.Acoust.Soc.Am Vol.125 Pages: 547-553
  • Peer Reviewed
• [Journal Article] Abundance and conservation status of the Yangtze finless porpoise in the Yangtze River China (2008)
  • Author(s): Zhao, X., Barlow, J., Taylor, B., Pitman, R., Wang K., Wei, Z., Stewart, B., Turvey, S., Akamatsu T., Reeves, R., Wang D.
  • Journal Title: Biological Conservation Vol.141 Pages: 3006-3018
  • Peer Reviewed
• [Journal Article] Simultaneous production of low-and high-frequency sounds in neonatal finless porpoises. (2008)
  • Author(s): Li S., Wang K., Dong S., Wang D., Akamatsu T.
  • Journal Title: j.Acoust.Soc.Am Vol.124、No2 Pages: 716-718
  • Peer Reviewed
• [Journal Article] Evidence of nighttime movement of finless porpoises through Kanmon Strait monitored using a stationary acoustic recording device (2008)
  • Author(s): Akamatsu,T., Nakazawa, I., Tsuchiyama, T., Kimura, N
  • Journal Title: Fisheries Science Vol.74 Pages: 970-976
  • Peer Reviewed
• [Journal Article] Estimation of the detection probability for Yangtze finless porpoises(Neophocaena phocaenoides asiaeorientalis) with a passive acoustic method (2008)
  • Author(s): Akamatsu T., Wang D., Wang K., Li S., Dong, S.,Zhao, X.,Barlow, J., Stewart, B.S.,Richlen, M
  • Journal Title: j.Acoust. Soc. Am Vol.123、No.6 Pages: 4403-4411
  • Peer Reviewed
• [Journal Article] INDIRECT EVIDENCE OF BOAT AVOIDANCEBEHAVIOR OF YANGTZE FINLESS PORPOISE (2008)
  • Author(s): Li S., Akamatsu T., Wang D., Wang K., Dong, S., Zhao, X., Wei, Z., Zhang, Z., Taylor, B., Barrett, L.A., Turvey, S.T., Reeves, R.R., Stewart, B.S., Richlen, M., Brandon, J.R.
  • Journal Title: Bioacoustics The International Journal of Animal Sound and its Recording Vol.17 Pages: 174-176
  • Peer Reviewed
• [Journal Article] Echolocation click sounds from wild inshore finless porpoise (Neophocaena phocaenoides sunameri)with comparisons to the sonar of riverine N. p. asiaeorientalis (2007)
  • Author(s): Li,S., 王丁, Wang,K., Akamatsu T., Ma., Z., Han, J.
  • Journal Title: j.Acoust. Soc. Am Vol.121、No.6 Pages: 3938-3946
  • Peer Reviewed
• [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., Barret t,L.A., Zhao,X., Reeves,R.R., Stewar t, B.S., Wang K., Wei,Z., Zhang, X., Pusser,L.T., Richlen,M., Brandon, J.R., Wang,D.
  • Journal Title: Biology Letters Vol.3、No.5 Pages: 537-540
  • 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 Vol.34、No.4 Pages: 260-265
• [Presentation] 揚子江におけるスナメリの分布変化 (2011)
  • Author(s): 木村里子
  • Organizer: 平成23年度日本水産学会春季大会
  • Place of Presentation: 東京海洋大学品川キャンパス
  • Year and Date: 20110327-20110331
• [Presentation] スナメリの音響・目視発見確率の予備的推定 (2011)
  • Author(s): 白木原国雄
  • Organizer: 平成23年度日本水産学会春季大会
  • Place of Presentation: 東京海洋大学品川キャンバス
  • Year and Date: 20110327-20110331
• [Presentation] Long-term passive acoustic monitoring of the moving patterns of cetaceans in the istanbul strait. (2011)
  • Author(s): Dede, A.
  • Organizer: The 25th Annual Conference of the European Cetacean Society.
  • Place of Presentation: Cadiz Spain
  • Year and Date: 20110321-20110323
• [Presentation] Scanning sonar of rolling porpoises during prey capture dives. (2011)
  • Author(s): Akamatsu, T.
  • Organizer: Fourth Internationl Science Symposium on Bio-logging 2011.
  • Place of Presentation: Hobart, Australia.
  • Year and Date: 20110314-20110318
• [Presentation] Seasonal behavior, and their influence on tidal behavior of Chinese white dolphins (Sousa chinensis) at Xinhuway River Estuary (2011)
  • Author(s): Lin, T. H.
  • Organizer: Symposium on Animal Behavior,Ecology and Environmental Education. Taiwan
  • Place of Presentation: Tainan, Taiwan
  • Year and Date: 20110100
• [Presentation] A review of passive acoustic monitoring methods for the detection of cetaceans in southeastern Asia region. (2010)
  • Author(s): Akamatsu, T.
  • Organizer: The Fourth Annual Meeting of Asian Fisheries Acoustics Society, AFAS 2010.
  • Place of Presentation: Eastin Hotel, Penang, Malaysia.
  • Year and Date: 20101214-20101216
• [Presentation] Seasonal and diurnal presence of finless porpoises at the corridor to the ocean from a semi-closed bay habitat. (2010)
  • Author(s): Akamatsu,T.
  • Organizer: 159th Meeting of the Acoustical Society of America.
  • Place of Presentation: Baltimore, Maryland.
  • Year and Date: 20100419-20100423
• [Presentation] Diurnal behavior pattern of Ganges river dolphins (Platanista gangetica gangetica) observed by stationed stereo acoustic data loggers. (2009)
  • Author(s): Yamamoto Y.
  • Organizer: The Society for Marine Mammalogy 18th Biennial Conference .Quebec
  • Place of Presentation: Quebec City.QC.Canada.
  • Year and Date: 20091012-20091016
• [Presentation] Vaquita Expedition 2008 : science for immediate management needs. (2009)
  • Author(s): Taylor B.L.
  • Organizer: The Society for Marine Mammalogy 18th Biennial Conference-Quebec
  • Place of Presentation: Quebec City.QC.Canada.
  • Year and Date: 20091012-20091016
• [Presentation] Presence pattern of Yangtze finless porpoises at a geographical bottleneck area of the Yangtze River system. (2009)
  • Author(s): 木村里子
  • Organizer: The Society for Marine Mammalogy 18th Biennial Conference-Quebec
  • Place of Presentation: Quebec City.C.Canada.
  • Year and Date: 20091012-20091016
• [Presentation] Scanning sonar of rolling porpoises during prey capture. Invited (2009)
  • Author(s): Akamatsu, T.
  • Organizer: The 5th Animal Sonar Symposium
  • Place of Presentation: Doshisha Univ.Kyoto. Japan.
  • Year and Date: 20090914-20090918
• [Presentation] Vocal hot spots of dugongs (Dugong dugon)monitored using simultaneous passive acoustic methods and visual observations in Thai waters.
  • Author(s): Ichikawa K.
  • Organizer: The Society for Marine Mammalogy 18th Biennial Conference-Quebec、Quebec City. QC. Canada.
  • Place of Presentation: Quebec City.QC.Canada.
• [Presentation] Development of high frequency signals in neonatal finless porpoises
  • Author(s): Li, S.
  • Organizer: The 5th Animal Sonar Symposium
  • Place of Presentation: Doshisha Univ.Kyoto. Japan.
• [Book] Biosonar and auditory system of the yangtze finless porpoise, In : Endangered Species: New Research (2009)
  • Author(s): Li, S., Wang,D., Wang,K., Akamatsu,T., Supin, A.Y., Popov, V.V.、Eds : A.Columbus L. Kuznetsov.
  • Total Pages: 1-13
  • Publisher: Nova Science Publishers, Inc
• [Book] In Biology, Evolution and Conservation of River Dolphins Within South America and Asia(Wild Protection,Destruction and Extinction)
  • Author(s): Li, S., Dong, S., Kimura, Akamatsu,T., Kexiong Wang, Ding Wang
  • Total Pages: 343-355
  • Publisher: Nova Science Pub Inc.、Detection of Yangtze finless porpoise in the Poyang Lake mouth area via passive acoustic data-loggers.
• [Remarks]
  • URL: http://cse.fra.affrc.go.jp/akamatsu/at/homepage.html