2023 Fiscal Year Final Research Report
Enhancing multi-species aquaculture in an inner bay through the integration of ecosystem ecology and mathematical optimization
| Project/Area Number |
19KT0006
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Multi-year Fund |
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| Section | 特設分野 |
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| Research Field |
Agricultural Resources for the Next Generation
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
林 俊介 法政大学, 理工学部, 教授 (20444482)
藤林 恵 九州大学, 工学研究院, 助教 (70552397)
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| Project Period (FY) |
2019-07-17 – 2024-03-31
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| Keywords | 生態学的環境容量 / 無給餌養殖 / マガキ / 温湯処理 / 付着物除去 / 志津川湾 |
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| Outline of Final Research Achievements |
1) Seasonal cycles of the chemical composition of particulate organic matter (POM) in Shizugawa Bay, and spatial distribution characteristics from the inner bay to the mouth of the bay, were elucidated. The fluxes and chemical composition of POM sinking to the bottom layer in the bay area and within aquaculture facilities were also clarified. 2) The effects of removing fouling organisms on cultivated oysters’ growth and POM settling flux were quantified through field experiments. Additionally, parameters for the individual growth model of cultured oysters were determined based on surveys and experimental results in the bay. Using these models, changes in the effectiveness of attached organism removal according to variations in feed concentration and fouling biomass were revealed. 3) A mathematical optimization algorithm was developed to explore operation cycles for maximizing oyster aquaculture production.
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| Free Research Field |
生態工学，水環境工学
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| Academic Significance and Societal Importance of the Research Achievements |
無給餌養殖漁業における付着物対策や生産サイクルの修正などの取り組みが，海域・養殖場内の有機物フローに有意に作用し，養殖生産性の改善や底層環境へのインパクト軽減につながることが定量的に示された．また，志津川湾での調査に基づき本研究が提示する環境容量の中での養殖漁業の生産効率最大化へのアプローチは，他海域にも適用可能と考えられる．さらに本成果は，海域における物質動態の調査，養殖生物と付着生物の関係についての生態学的な調査・実験・モデル化，数理最適化など幅広い研究アプローチを組み合わせて生み出された．多くの研究分野が，一次生産業の持続性・生産性向上に貢献可能であることを示している．
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