Development of the optimum fishing strategies from the post-disaster and spatial bio economic analysis; building the resilience of fisheries

• Project/Area Number: 17K07903
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Aquatic bioproduction science
• Research Institution: Iwate University
• Principal Investigator: ISHIMURA GAKUSHI 岩手大学, 農学部, 准教授 (50524815)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 最適化 / 空間生物経済分析 / 漁獲行動最適化 / 漁場経済推定 / 震災復興 / 漁場 / 空間分析 / 市場分析 / 漁業者行動 / 漁場分析 / 漁業 / 漁業経済 / レジリアンス / 不確実性

Outline of Final Research Achievements

This study utilizes operational and market data provided by the Kesennuma offshore longline fisheries to explore optimum fishing strategies. By using the spatial cluster analysis based on the spatial information of the operational data, haul value & weight and the composition of the catch fish species. With identified fishing grounds with the probability distributions of catch, value and species compositions, this study conducted stochastic simulations for fishing strategies to explore the optimal fishing strategies.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果は、東日本大震災後の気仙沼近海はえ縄船団の操業・市場データを元にした空間的漁場把握と把握されたそれぞれの漁場の漁獲及び経済特性を明らかにした上でし、航海日数を限定した時期別の操業確率シミュレーションを各漁場選択を考慮し行うことで様々な不確実性に強い最適漁獲戦略を探求した。不確実性に強い最適操業戦略の提示は気仙沼近海延縄漁船団のみならず、日本の漁業新しい可能性を示す。これは学術的意義以上に不確実性に強い漁業構築に向けた研究の社会実装へと繋がる。

Research Products

• [Int'l Joint Research] the Norwegian School of Economics(ノルウェー)
• [Int'l Joint Research] the University of British Columbia(カナダ)
• [Int'l Joint Research] University of Washington(米国)
• [Presentation] 空間操業分析と航海最適化探求 (2020)
  • Author(s): 佐々木皓文（岩手大学農）・阿部景太（the Norwegian School of Economics 経済）・石村学志（岩手大学農・国立環境研究所）
  • Organizer: 日本水産学会
• [Presentation] Developing a regional fishery portfolio for alternative policies: An upside-bioeconomic analysis for Japanese fisheries (2019)
  • Author(s): Ishimura, Gaku, Kawamura, Kei Tokunaga, Kanae, Otsuka, Kazuhiko, Abe, Keita
  • Organizer: 2019 North America Association of Fisheries Economics
  • Int'l Joint Research
• [Presentation] Optimal Spatial Strategy of the Fishing Efforts for Heterogeneous Fishing Grounds (2018)
  • Author(s): Gakushi Ishimura, Ren Odaira,Keita Abe
  • Organizer: International Institute of Fishery Economics and Trade
  • Int'l Joint Research
• [Presentation] Optimizing fishing strategies and spatial management by linking spatial abundance information and economic indicators (2017)
  • Author(s): Gakushi Ishimura, Keita Abe
  • Organizer: IMBIZO 5: Marine biosphere research for a sustainable ocean: Linking ecosystems, future states and resource management
  • Int'l Joint Research