Precise abundance estimation method by cetacean sighting surveys

2008 Fiscal Year Final Research Report

• Project/Area Number: 19780156
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: General fisheries
• Research Institution: Fisheries Research Agency
• Principal Investigator: 岡村 寛 Fisheries Research Agency, 遠洋水産研究所外洋資源部, 主任研究員 (40371942)
• Project Period (FY): 2007 – 2008
• Keywords: 水産資源学 / 水産資源管理 / 数理モデル / 鯨 / 目視

Research Abstract

本研究では,最新の統計技法を使用して,南氷洋ミンククジラの個体数をより精度良く推定する方法を開発した.開発したモデルをIWCから提供を受けた南氷洋ミンククジラの実際の目視データに当てはめることにより,偏りの小さい南氷洋の個体数推定値を得た.その結果,従来の方法で知られているよりも,個体数の変動は小さいことが明らかになった.

Research Products

• [Journal Article] A resource selection model for analyzing pseudoreplicated data due to grouping behavior of animals (2008)
  • Author(s): Okamura, H., Kiyota, M., and Kitakado, T.
  • Journal Title: Journal of Agricultural, Biological, and Environmental Statistics 13(3) Pages: 294-312
  • Peer Reviewed
• [Journal Article] Toward sustainable management of small cetacean fisheries around Japan (2008)
  • Author(s): Okamura, H., Iwasaki, T., and Miyashita, T.
  • Journal Title: Fisheries Science 74(4) Pages: 718-729
  • Peer Reviewed
• [Journal Article] Estimation of g(0) in Korean line transect surveys (2007)
  • Author(s): Okamura, H. and An, Y. -R.
  • Journal Title: Journal of Cetacean Research and Management 9 Pages: 186-187
• [Presentation] The simulation-based management of small cetacean fisheries around Japan (2008)
  • Author(s): Okamura, H., Hiramatsu, K., and Miyashita, T.
  • Organizer: 5th World Fisheries Congress Program & Abstract
  • Place of Presentation: Yokohama
  • Year and Date: 20081020-25
• [Presentation] Potential difficulties and challenging issues in line transect surveys for the estimation of whale abundance (2008)
  • Author(s): Kitakado, T., Okamura, H., Shimada, H., and Miyashita, T.
  • Organizer: 5th World Fisheries Congress Program & Abstract
  • Place of Presentation: Yokohama
  • Year and Date: 20081020-25
• [Presentation] 小型鯨類の管理方法の検討 (2007)
  • Author(s): 岡村 寛
  • Organizer: 東京大学海洋研究所共同利用研究集会「シミュレーションを用いた水産資源の管理 -不確実性への挑戦-」
  • Place of Presentation: 東京
  • Year and Date: 20071114-19
• [Presentation] シミュレーションモデルによる小型鯨類捕獲の影響評価 (2007)
  • Author(s): 岡村 寛・岩崎俊秀・宮下富夫
  • Organizer: 平成19年度日本水産学会秋季大会講演要旨集
  • Place of Presentation: 函館
  • Year and Date: 20071000
• [Remarks] Okamura, H. and Kitakado, T. (2007)Abundance estimates of Southern Hemisphere minke whales from the IDCR/SOWER surveys using a hazard probability model. 第59回国際捕鯨委員会科学委員会提出論文(SC/59/IA14), 29pp.
• [Remarks] Okamura, H., and Kitakado, T. (2008) The specifications of the hazard probability model to estimate the abundances of Southern Hemisphere minke whales from the historical IDCR/SOWER survey data. SOWER abundance workshop (SC/F08/A2). 19pp.
• [Remarks] Okamura, H. and Kitakado, T. (2008) Abundance estimates of Antarctic minke whales from the historical IDCR/SOWER survey data using the OK method. 第60回国際捕鯨委員会提出文書 (SC/60/IA8), 19pp.