Impacts of the tsunami associated with the 2011Great Earthquake in East Japan on the populations of salmon and ayu in Sanriku coast of northern japan
Project/Area Number |
24380105
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
General fisheries
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Research Institution | The University of Tokyo |
Principal Investigator |
Otake Tsuguo 東京大学, 農学生命科学研究科, 教授 (20160525)
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Co-Investigator(Kenkyū-buntansha) |
SHIRAI Kotaro 東京大学, 大気海洋研究所, 助教 (70463908)
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Project Period (FY) |
2012-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2012: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
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Keywords | 東日本大震災 / サケ / アユ / 耳石 / 微量元素組成 / 安定同位体比 / 資源 / 三陸沿岸域 / 微量元素 / 母川回帰 / 遡上生態 |
Outline of Final Research Achievements |
Otolith chemical composition of juvenile chum salmon was found to well discriminate the juveniles from different hatcheries within the same area. The analysis through the life history for adult from Hokkaido coast and immature fish from the Bering Sea revealed that otolith Sr:Ba ratios periodically fluctuated. These suggest that otolith chemical analysis can provide important information to reveal the effects of the 2011 Tsunami of the Great East Japan Earthquake on the migration history and homing behavior. The upstream migrants of ayu immediately after the tsunami were found to be solely composed of fish hatched during October-November, whereas those before the tsunami were mostly composed of fish hatched in September. The shift of hatch dates was found to result of the selective mortality of early hatched fish occurred during the tsunami. The hatch date composition of upstream migrants returned to the state before the tsunami in 2013-2014, but the sizes were observed to decrease.
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Report
(5 results)
Research Products
(36 results)
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[Journal Article] Stable isotopic composition of anguilliform leptocephali and other food web components from west of the Masnarene Plateau2015
Author(s)
Feunteun E., Miller M.J., 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: 69-83
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Biodiversity and distribution of leptocephali west of the Mascarene Plateau in the sxouthwestern Indian Ocean2015
Author(s)
Miller M.J., Feunteun E., Aoyama J., Watanabe S., Kuroki M., Lecomte-Finger R., Minegishi Y., Robinet T., Reveilac E., Gagnaire P-A., Berrebi P., Tsukamoto K., Otake T.
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Journal Title
Progress in Oceanography
Volume: 137
Pages: 84-102
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Assessment of the mechanism of elemental incorporation into bivalve shells (Arctica islandica) based on elemental distribution at the microstructural scale2014
Author(s)
Shirai, K., Schöne, B.R., Miyaji, T., Radarmacher, P., Krause Jr., R.A. and Tanabe, K.
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Journal Title
Geochimica et Cosmochimica Acta
Volume: 126
Pages: 307-320
DOI
Related Report
Peer Reviewed / Open Access
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[Presentation] Otolith stable isotope and trace element analyses to reconstruct migration history of chum salmon Oncorhynchus keta2015
Author(s)
Kawakami T., Shimizu Y., Ogawa G., Saito T., Iida M., Sugihara N., Sato S., Ueda H.,Otake T.
Organizer
Symposium on growth-survival paradigm in early life stages of fish: controversy, synthesis, and multidisciplinary approach
Place of Presentation
中央水産研究所(横浜市)
Year and Date
2015-11-09
Related Report
Int'l Joint Research
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