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Enhancement of material cycle improvement by taper cultivation hanging facilities

Research Project

Project/Area Number 16K14975
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Aquatic bioproduction science
Research InstitutionFukui Prefectural University

Principal Investigator

seto masabumi  福井県立大学, 海洋生物資源学部, 教授 (60360020)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords養殖施設
Outline of Final Research Achievements

Water near sea bottom around the aquaculture grounds into which a lot of nutrients flow becomes deficient in oxygen during summer stratification. We described relationship between vertical mixing rate and taper ratio around taper cultivation hanging facilities. Vertical mixing of the facilities could be explained by the vertical variation of the vortex shedding frequency and wake volume of Karman vortex streets generated on the hanging direction of the facilities. Hypoxia water behavior of stratification stage and convection stage around the aquaculture site were investigated through the numerical simulation and observed analyzing data in Lake Notoro. Based on tolerance of scallop to low concentrations of dissolved oxygen and taper cultivation hanging facilities, we developed a method for adaptive management in aquaculture grounds for Japanese scallop Patinopecten yessoensis.

Academic Significance and Societal Importance of the Research Achievements

本研究は、垂下養殖施設の外形をテーパ化することで、施設自体に上下混合促進効果が発現し、動力装置や土木工事を伴わずに流れが緩やかな閉鎖性養殖海域の水質改善に寄与できる可能性が示唆された。垂下養殖施設を構成する網カゴは、養殖業者が使い慣れた漁具のため、維持管理に新たな技術や知識を必要とせず、貧酸素水塊挙動診断アプリを活用した養殖活動を通して、環境再生と持続的な安定生産を融合した環境再生型漁業の実現に貢献することが期待できる。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (3 results)

All 2018 2017 2016

All Presentation (3 results)

  • [Presentation] 非定常流場におけるテーパ円柱の上下混合促進機構2018

    • Author(s)
      瀬戸 雅文
    • Organizer
      日本水産工学会学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] 二枚貝中間育成における自律運用管理プロセスの確立2017

    • Author(s)
      瀬戸 雅文
    • Organizer
      日本水産学会中部支部大会
    • Related Report
      2017 Research-status Report
  • [Presentation] テーパ付き円柱構造物の上下混合促進機構2016

    • Author(s)
      瀬戸 雅文
    • Organizer
      日本水産工学会
    • Place of Presentation
      福井県立大学小浜キャンパス(福井県小浜市)
    • Year and Date
      2016-12-03
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2021-02-19  

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