| Project/Area Number |
26660151
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Aquatic bioproduction science
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| Research Institution | Hokkaido University |
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Principal Investigator |
MUKAI TOHRU 北海道大学, 水産科学研究院, 教授 (60209971)
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| Co-Investigator(Kenkyū-buntansha) |
澤田 浩一 国立研究開発法人水産研究・教育機構, 水産工学研究所, グループ長 (30372080)
山本 潤 北海道大学, 北方生物圏フィールド科学センター, 助教 (10292004)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | トワイライトゾーン / 動物プランクトン / デジタルカメラ / 音響的手法 / 光学的手法 / 定量化 / 魚群探知機 / 音響反射率 / 音響散乱 / モニタリング / 姿勢観察 / 浮遊状態 / 海洋トワイライトゾーン |
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| Outline of Final Research Achievements |
This application was aimed at developing a method of quantifying zooplankton inhabiting the ocean twilight zone with depths of 200 to 500 meters using a combination of the acoustic and the optical method. Using the acoustic method, besides krill, which has many examples of measurements up to now, it was also possible to measure the acoustic scattering cross-section which is the scale factor in quantification for copepods and amphipods. On the other hand, with the optical method, it was possible to photograph zooplankton at depths of up to 100 meters using a general-purpose digital camera with external flash. Further shooting at greater depths could not be realized due to troubles in the equipment.
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