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大きく変動しうる河川環境のもとでアユ個体群を管理するための堅牢な接近手法の確立

Research Project

Project/Area Number 17J09125
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Rural environmental engineering/Planning
Research InstitutionKyoto University

Principal Investigator

八重樫 優太  京都大学, 農学研究科, 特別研究員(DC1)

Project Period (FY) 2017-04-26 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2019: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2018: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2017: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywordsアユ / カワウ / 個体群管理 / 確率制御 / 食害 / インパルス制御 / ハミルトン・ヤコビ・ベルマン方程式 / 内水面漁業 / 最適制御 / 数理モデル / 河川管理
Outline of Annual Research Achievements

今年度は昨年度開発したモデルをより現実に近いモデルとするために,確率インパルス制御にもとづいたカップリングモデルの構築と,それに対する数値計算手法の開発およびカップリングモデルの数値解析に取り組んだ.これにより,アユの成長や匹数の季節変化を考慮した,より現実的なカワウ個体群管理の閾値と駆除幅を決定することができるようになった.また,高次元のハミルトン・ヤコビ・ベルマン準変分不等式を安定して数値的に求解できる手法を開発した.応用として,滋賀県琵琶湖流域を対象として,カップリングモデルの数値解析を行なった.構築したモデルを適用した結果,各時刻において現存するアユの匹数に対するカワウ駆除の閾値および駆除規模が求められた.これにより地方自治体や漁業協同組合が「いつ・どの程度カワウ駆除を行なうべきか」を知ることが可能なった.

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (53 results)

All 2020 2019 2018 2017

All Journal Article (25 results) (of which Peer Reviewed: 25 results,  Open Access: 5 results,  Acknowledgement Compliant: 2 results) Presentation (28 results) (of which Int'l Joint Research: 9 results)

  • [Journal Article] Biological population management based on a Hamilton-Jacobi-Bellman equation with boundary blow up2020

    • Author(s)
      Yoshioka H., Yaegashi Y., Yoshioka Y., and Fujihara, M.
    • Journal Title

      International Journal of Control

      Volume: -

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analysis and computation of probability density functions for a 1-D impulsively controlled diffusion process2019

    • Author(s)
      Yaegashi Yuta、Yoshioka Hidekazu、Tsugihashi Kentaro、Fujihara Masayuki
    • Journal Title

      Comptes Rendus Mathematique

      Volume: 357 Issue: 3 Pages: 306-315

    • DOI

      10.1016/j.crma.2019.02.007

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optimal harvesting policy of an inland fishery resource under incomplete information2019

    • Author(s)
      Yoshioka H., Yaegashi Y., Yoshioka Y., and Tsugihashi, K.
    • Journal Title

      Applied Stochastic Models in Business and Industry

      Volume: 35 Issue: 4 Pages: 939-962

    • DOI

      10.1002/asmb.2428

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An exact viscosity solution to a Hamilton-Jacobi-Bellman quasi-variational inequality for animal population management2019

    • Author(s)
      Yaegashi Y., Yoshioka H., Tsugihashi K., and Fujihara M.
    • Journal Title

      Journal of Mathematics in Industry

      Volume: 9 Issue: 1

    • DOI

      10.1186/s13362-019-0062-y

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A primitive model for stochastic regular-impulse population control and its application to ecological problems2019

    • Author(s)
      Yoshioka H., Yaegashi Y., Yoshioka Y., Hamagami K., and Fujihara M.
    • Journal Title

      Advanced Controls for Applications

      Volume: 1 Issue: 1

    • DOI

      10.1002/adc2.16

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mathematical Modeling for Decision-Making of Observation Timing and Workload for Cost-Effective River Environmental Management2019

    • Author(s)
      吉岡秀和,辻村元男,八重樫優太,藤原正幸
    • Journal Title

      Journal of Real Options and Strategy

      Volume: 11 Issue: 0 Pages: 25-37

    • DOI

      10.12949/realopn.11.25

    • NAID

      130007769830

    • ISSN
      1881-5774, 1884-1635
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Non-Local Fokker-Planck Equation of Imperfect Impulsive Interventions and its Effectively Super-Convergent Numerical Discretization2019

    • Author(s)
      Yoshioka Hidekazu、Yaegashi Yuta、Tsujimura Motoh、Fujihara Masayuki
    • Journal Title

      Communications in Computer and Information Science

      Volume: 1094 Pages: 79-91

    • DOI

      10.1007/978-981-15-1078-6_7

    • NAID

      120006879525

    • ISBN
      9789811510779, 9789811510786
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A finite difference scheme for variational inequalities arising in stochastic control problems with several singular control variables2019

    • Author(s)
      Yoshioka H. and Yaegashi Y.
    • Journal Title

      Mathematics and Computers in Simulation

      Volume: 156 Pages: 40-66

    • DOI

      10.1016/j.matcom.2018.06.013

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hamilton-Jacobi-Bellman Quasi-Variational Inequality arising in an environmental problem and its numerical discretization2019

    • Author(s)
      Yoshioka H., Yaegashi Y., Yoshioka Y., and Hamagami K.
    • Journal Title

      Computers & Mathematics with Applications

      Volume: 77 Issue: 8 Pages: 2182-2206

    • DOI

      10.1016/j.camwa.2018.12.004

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Robust stochastic control modeling of dam discharge to suppress overgrowth of downstream harmful algae2018

    • Author(s)
      Yoshioka H. and Yaegashi Y.
    • Journal Title

      Applied Stochastic Models in Business and Industry

      Volume: 34 Issue: 3 Pages: 338-354

    • DOI

      10.1002/asmb.2301

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Unique solvability of a singular stochastic control model for population management2018

    • Author(s)
      Yaegashi Y. and Yoshioka H.
    • Journal Title

      Systems & Control Letters

      Volume: 116 Pages: 66-70

    • DOI

      10.1016/j.sysconle.2018.03.009

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 大きく不確実な環境下における適合的な付着藻類管理モデルの提案と斐伊川への応用2018

    • Author(s)
      吉岡 秀和, 八重樫 優太, 次橋 健太郎, 渡部 建志
    • Journal Title

      河川技術論文集

      Volume: 24 Pages: 291-296

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An optimal allocation model to release fish into a river system2018

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Journal Title

      Journal of Rainwater Catchment Systems

      Volume: 24 Pages: 1-8

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A singular stochastic control model for sustainable population management of the fish-eating waterfowl Phalacrocorax carbo2018

    • Author(s)
      Yaegashi Y, Yoshioka H, Unami K, Fujihara Masayuki
    • Journal Title

      Journal of Environmental Management

      Volume: 219 Pages: 18-27

    • DOI

      10.1016/j.jenvman.2018.04.099

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An optimal stopping approach for onset of fish migration2018

    • Author(s)
      Yoshioka H. and Yaegashi Y.
    • Journal Title

      Theory in Biosciences

      Volume: 137 Issue: 2 Pages: 1-18

    • DOI

      10.1007/s12064-018-0263-8

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stochastic differential game for management of non-renewable fishery resource under model ambiguity2018

    • Author(s)
      Yoshioka H. and Yaegashi Y.
    • Journal Title

      Journal of Biological Dynamics

      Volume: 12 Issue: 1 Pages: 817-845

    • DOI

      10.1080/17513758.2018.1528394

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impulse and singular stochastic control approaches for population management of a fish-eating bird2018

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Journal Title

      Springer Nature Switzerland AG

      Volume: 1 Pages: 493-500

    • DOI

      10.1007/978-3-030-00473-6_52

    • ISBN
      9783030004729, 9783030004736
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Wise-use of sediment for river restoration: numerical approach via HJBQVI2018

    • Author(s)
      Yoshioka H., Yaegashi Y., Yoshioka Y., Hamagami K., and Fujihara M.
    • Journal Title

      Communications in Computer and Information Science

      Volume: 946 Pages: 271-285

    • DOI

      10.1007/978-981-13-2853-4_21

    • ISBN
      9789811328527, 9789811328534
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Singular stochastic control model for algae growth management in dam downstream2018

    • Author(s)
      Yoshioka Hidekazu、Yaegashi Yuta
    • Journal Title

      Journal of Biological Dynamics

      Volume: 12 Issue: 1 Pages: 242-270

    • DOI

      10.1080/17513758.2018.1436197

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Optimization model to start harvesting in stochastic aquaculture system2017

    • Author(s)
      Yoshioka H. and Yaegashi Y.
    • Journal Title

      Applied Stochastic Models in Business and Industry

      Volume: in press Issue: 5 Pages: 1-18

    • DOI

      10.1002/asmb.2250

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] An optimal management strategy for stochastic population dynamics of released Plecoglossus altivelis in rivers2017

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Journal Title

      International Journal of Modeling, Simulation, and Scientific Computing

      Volume: 8, No.1750039 Issue: 02 Pages: 1-16

    • DOI

      10.1142/s1793962317500398

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Optimal installation of overhead lines (Tegusu) to reduce predation from piscivorous birds to Plecoglossus altivelis (Ayu) taking into account of its decaying protection effect2017

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Journal Title

      Journal of Rainwater Catchment Systems

      Volume: 23 Pages: 13-18

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stochastic optimization model of aquacultured fish for sale and ecological education2017

    • Author(s)
      Yoshioka Hidekazu、Yaegashi Yuta
    • Journal Title

      Journal of Mathematics in Industry

      Volume: 7 Issue: 1 Pages: 1-23

    • DOI

      10.1186/s13362-017-0038-8

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] ダム直下における付着藻類の繁茂を抑制する流量管理方針のモデリング2017

    • Author(s)
      吉岡 秀和, 八重樫 優太
    • Journal Title

      河川技術論文集

      Volume: 23 Pages: 561-566

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mathematical analysis for management of released fish2017

    • Author(s)
      Yoshioka H.、Yaegashi Y.
    • Journal Title

      Optimal Control Applications and Methods

      Volume: 39 Issue: 2 Pages: 1141-1146

    • DOI

      10.1002/oca.2392

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] A discontinuous Hamiltonian approach for operating a dam-reservoir system in a river2020

    • Author(s)
      Yoshioka H., Yaegashi Y., and Yoshioka Y.
    • Organizer
      ICIAE2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Discrete costly observation model for early growth estimation in fisheries management: a case study in Plecoglossus altivelis altivelis2019

    • Author(s)
      Yoshioka H., Yoshioka Y., Yaegashi Y., Tanaka T., Horinouchi M., and Aranishi F.
    • Organizer
      平成31年度公益社団法人日本水産学会春季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Application of an adaptive viscosity scheme to discretization of the optimality equation for a discrete costly observation problem2019

    • Author(s)
      Yoshioka H., Tsujimura M., Yaegashi Y., Tanaka T., Yoshioka Y., and Fujihara M.
    • Organizer
      第24回計算工学講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 河川における生物ダイナミックスの管理方針に関わる確率過程モデリング:斐伊川の事例2019

    • Author(s)
      吉岡 秀和, 辻村 元男, 八重樫 優太, 吉岡 有美, 濱上 邦彦
    • Organizer
      日本応用数理学会2019年度年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Non-local Fokker-Planck equation of imperfect impulsive interventions and its effectively super-convergent numerical discretization2019

    • Author(s)
      Yoshioka H., Yaegashi Y., Tsujimura M., and Fujihara M.
    • Organizer
      AsiaSim2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical computation of the coefficients in an exact solution to an impulse control model for optimal population management2018

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Organizer
      第23回計算工学講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 河川清掃の変分不等式に対する有限差分近似2018

    • Author(s)
      吉岡 秀和, 白井 朋之, 田上 大助, 八重樫 優太
    • Organizer
      第23回計算工学講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 個体群管理のためのインパルス制御モデルにおける閾値の感度解析2018

    • Author(s)
      八重樫 優太, 吉岡 秀和, 宇波 耕一, 藤原 正幸
    • Organizer
      平成30年度農業農村工学会大会講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] A time-dependent stochastic optimal impulse control model for management of fish-eating bird2018

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Organizer
      第26回日本雨水資源化システム学会大会研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Stochastic optimal impulse control policy for management of seasonal fish-eating bird population dynamics2018

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Organizer
      IMI共同研究 一般研究_研究集会(II), 数理農学における時系列データのモデル化と解析
    • Related Report
      2018 Annual Research Report
  • [Presentation] Impulse and singular stochastic control approaches for population management of a fish-eating bird2018

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Organizer
      International Conference on Optimization and Decision Science
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A stochastic impulsive control model for population management of fish-eating bird Pharacrocorax carbo and its numerical computation2018

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Organizer
      AsiaSim2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Wise-use of sediment for river restoration: numerical approach via HJBQVI2018

    • Author(s)
      Yoshioka H., Yaegashi Y., Yoshioka Y., Hamagami K., and Fujihara M.
    • Organizer
      AsiaSim2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dynamic decision-making model for stochastic population management with scheduled inspections2018

    • Author(s)
      Yoshioka H., Yaegashi Y., Yoshioka Y., Hamagami K., Fujihara M., and Tsugihashi K.
    • Organizer
      2018 Joint 10th International Conference on Soft Computing and Intelligent Systems and 19th International Symposium on Advanced Intelligent Systems
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 確率論的な特異制御問題に付随する変分不等式に対する有限差分法2018

    • Author(s)
      吉岡 秀和, 八重樫 優太
    • Organizer
      日本応用数理学会環瀬戸内応用数理研究部会第21回シンポジウム
    • Related Report
      2017 Annual Research Report
  • [Presentation] 魚食性鳥類カワウの駆除計画の策定を目的とした特異確率制御モデル2018

    • Author(s)
      八重樫 優太, 吉岡 秀和, 宇波 耕一, 藤原 正幸
    • Organizer
      数理農学の基盤づくりに向けて
    • Related Report
      2017 Annual Research Report
  • [Presentation] 島根県斐伊川における環境・生態の数理モデリング2018

    • Author(s)
      吉岡 秀和, 次橋 健太郎, 渡部 建志, 八重樫 優太
    • Organizer
      平成29年度生物資源科学部セミナーおよび島根県食品工業研究会との交流会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 有害生物個体群の駆除戦略を導く特異確率制御モデルの数値近似2017

    • Author(s)
      八重樫 優太, 吉岡 秀和, 宇波 耕一, 藤原 正幸
    • Organizer
      第22回計算工学講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 河床付着藻類の繁茂抑制に関する変分不等式の具体的な厳密解と漸近解2017

    • Author(s)
      吉岡 秀和, 八重樫 優太
    • Organizer
      日本応用数理学会2017年度年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 内水面水産資源の堅牢な管理指針を見出すための微分ゲーム理論2017

    • Author(s)
      吉岡 秀和, 八重樫 優太
    • Organizer
      ELR2017名古屋
    • Related Report
      2017 Annual Research Report
  • [Presentation] 河川水系の漁場特性を考慮したアユ放流量の最適配分モデル2017

    • Author(s)
      八重樫 優太, 吉岡 秀和, 宇波 耕一, 藤原正幸
    • Organizer
      第74回農業農村工学会京都支部講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Generalization of a singular stochastic control model for optimal suppression strategy of a fish-eating bird population2017

    • Author(s)
      八重樫 優太, 吉岡 秀和, 宇波 耕一, 藤原正幸
    • Organizer
      第25回日本雨水資源化システム学会大会研究発表会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Application of singular stochastic control theory to fish-eating waterfowl population management2017

    • Author(s)
      八重樫 優太, 吉岡 秀和, 宇波 耕一, 藤原 正幸
    • Organizer
      ファイナンスの数理解析とその応用
    • Related Report
      2017 Annual Research Report
  • [Presentation] Fish migration as a stochastic optimal stopping problem: application of the methodology in mathematical finance2017

    • Author(s)
      吉岡 秀和, 八重樫 優太
    • Organizer
      ファイナンスの数理解析とその応用
    • Related Report
      2017 Annual Research Report
  • [Presentation] 最適停止問題に基づく魚類回遊タイミングのモデリング2017

    • Author(s)
      吉岡 秀和, 八重樫 優太
    • Organizer
      日本応用数理学会2017年度年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Optimal policy of predator suppression for sustainable inland fishery management2017

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Organizer
      12th SDEWES Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical simulation of animal migration via a nonlinear degenerate elliptic free boundary problem2017

    • Author(s)
      Yoshioka H. and Yaegashi Y.
    • Organizer
      The 36th JSST Annual International Conference on Simulation Technology
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A two-variable stochastic singular control model for management of fishery resources under predation2017

    • Author(s)
      Yaegashi Y., Yoshioka H., Unami K., and Fujihara M.
    • Organizer
      The 36th JSST Annual International Conference on Simulation Technology
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research

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Published: 2017-05-25   Modified: 2024-03-26  

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