The spawning ecology of Japanese eels
| Project/Area Number |
26450268
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Aquatic bioproduction science
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| Research Institution | Kindai University (2016)
Nihon University (2014-2015) |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | ニホンウナギ / 卵 / 内部潮汐 / UNA-CAM / ポップアップタグ / 日周鉛直移動 / 光 / 水温 / 産卵時刻 / 産卵回遊 / 産卵場所 / 環境DNA / 産卵地点 / 回遊行動 / プレレプトセファルス / なつしま航海 / 塩分フロント |
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| Outline of Final Research Achievements |
Our analysis of the oceanic migratory behavior of large female Anguilla japonica silver eels with pop-up satellite archival tags found that they first use the Kuroshio Current and then go south into the open sea near the Ogasawara Islands. The daily rhythm of diel vertical migration of Japanese eels observed in the open sea and their spawning area was the same behavior found in all areas during their spawning migration. A clear relationship between the upper and lower limits of migration and the sun and moon light and water temperature was found. Their experienced temperatures estimated from the development rate of collected eggs was not significantly different from the environmental temperature from CTD data, only if spawning occurred at 1:00 at night 3 days before new moon in all cases. Therefore, we hypothesize that Japanese eels spawn at about 1:00 a.m. and internal tide patterns may contribute to the mechanisms that determine the places they spawn in the open ocean.
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Report
(4 results)
Research Products
(60 results)
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[Journal Article] High biodiversity of leptocephali in Tomini Bay Indonesia in the center of the coral triangle2016
Author(s)
Miller Michael J., Sam Wouthuyzen, Hagi Y. Sugeha, Mari Kuroki, Atsushi Tawa, Shun Watanabe, Augi Syahailatua, Sasanti Suharti, Fadly Y. Tantu, Tsuguo Otake, Katsumi Tsukamoto and Jun Aoyama
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Journal Title
Regional Studies in Marine Science
Volume: 9
Pages: 99-113
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Geographic analyses of stable isotopic and fatty acid composition of three families of anguilliform leptocephali in the western South Pacific2016
Author(s)
Lienart C, Feunteun E, Miller MJ, Aoyama J, Mortillaro JM, Hubas C, Kuroki M, Watanabe S, Dupuy C, Carpentier A, Otake T, Tsukamoto K, Meziane T
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Journal Title
Marine Ecology Progress Series
Volume: 544
Pages: 225-241
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Stable isotopic composition of anguilliform leptocephali and other food web components from west of the Mascarene Plateau2015
Author(s)
Feunteun E, Miller MJ, Carpentier A, Aoyama J, Dupuy C, Kuroki M, Pagano M, Reveillac E, Sellos D, Watanabe S, Tsukamoto K, Otake T
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Journal Title
Progress in Oceanography
Volume: 137
Pages: 235-246
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Biodiversity and distribution of leptocephali west of the Mascarene Plateau in the southwestern Indian Ocean2015
Author(s)
Miller MJ, Feunteun E, Aoyama J, Watanabe S, Kuroki M, Lecomte-Finiger R, Minegishi Y, Robinet T, Reveillac E, Gagnaire PA, Berrebi P, Tsukamoto K, Otake T
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Journal Title
Progress in Oceanography
Volume: 137
Pages: 84-102
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Early life history of the Luzon mottled eel Anguilla luzonensis recruited to the Cagayan River, Luzon Island, the Philippines2015
Author(s)
Shinoda A, Yoshinaga T, Aoyama J, Tsuchida G, Nakazato S, Ishikawa M, Matsugamoto Y, Watanabe S, Azanza RV, Tsukamoto K
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Journal Title
Coastal Marine Science
Volume: 38
Pages: 21-26
NAID
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] 産卵生態研究のフロンティア2015
Author(s)
渡邊 俊
Organizer
鹿児島県ウナギ資源・増殖のための勉強会
Place of Presentation
ホテルウェルビューかごしま (鹿児島県鹿児島市)
Year and Date
2015-10-29
Related Report
Invited
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