Estimation of jellyfish patch density and bay-scale abundance using aerial photography and numerical model
| 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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Report
(4 results)
Research Products
(10 results)
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[Presentation] Observation of Moon Jellyfish Spatial Distribution Using a Scientific Echo Sounder and Underwater Camera2016
Author(s)
Mano, T., Guo, X., Fujii, N., Yoshie, N., and Takeoka, H.
Organizer
2016 Ocean Science Meeting
Place of Presentation
New Orleans, USA
Year and Date
2016-02-23
Related Report
Int'l Joint Research
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