| Project/Area Number |
25550014
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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 |
Environmental dynamic analysis
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| Research Institution | Ehime University |
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Principal Investigator |
Guo Xinyu 愛媛大学, 沿岸環境科学研究センター, 教授 (10322273)
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| Co-Investigator(Kenkyū-buntansha) |
TAKEOKA Hidetaka 愛媛大学, 沿岸環境科学研究センター, 教授 (90116947)
YOSHIE Naoki 愛媛大学, 沿岸環境科学研究センター, 講師 (50374640)
FUJII Naoki 佐賀大学, 低平地沿岸海域研究センター, 助教 (10403859)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | ミズクラゲ / 集群 / 計量魚探探査機 / 水中カメラ / 空間分布 / 時間変化 / 現存量 / 魚探 |
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| Outline of Final Research Achievements |
To know bay-scale abundance of moon jellyfishes, spatial distribution and swimming features of individual jellyfish in its aggregations in Uwa Sea, we carried out a monitoring by a camera fixed at a highland and three times of ship-based observations using underwater camera and echo sounder. We found the presence of hollow structure in the vertical distribution of jellyfish density inside the aggregations that usually presents a spherical or zonal shape at sea surface. We also demonstrated a well matching of echo sounder based jellyfish density to that given by an underwater camera in all three field observations. Therefore, the echo sounder scanning over a bay is an efficient way for knowing the abundance of jellyfish in the bay and will serve as a good tool for understanding the formation mechanism of a hollow structure inside the aggregation of jellyfish that was also reported in the western coast of American recently.
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