Assessment of the impact of global warming on sex determination in coastal marine fish
| Project/Area Number |
15K18728
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Aquatic bioproduction science
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| Research Institution | Tokyo University of Marine Science and Technology |
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Principal Investigator |
Yamamoto Yoji 東京海洋大学, 学術研究院, 助教 (10447592)
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| Project Period (FY) |
2015-04-01 – 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 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 地球温暖化 / 気候変動 / 指標生物 / 温度依存型性決定機構 / 性分化 / 性転換 / ギンイソイワシ / トウゴロウイワシ目魚類 / 遺伝型性決定機構 |
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| Outline of Final Research Achievements |
To assess impacts of global warming on sex determination in marine fish, we selected cobaltcap silverside as an indicator species and screened wild populations for the presence of sex-reversals. Relatively low numbers of sex-reversals (~20%) from both sexes were detected in each area/year, except the population of Tokyo Bay in 2016 (40%~ XX-males observed). To assess the relationship between high temperature and observed XX-males, we conducted otolith increment analysis using fish from 2014-2016 in Tokyo Bay and estimated the hatching date/period and the temperature each individual experienced shortly after hatching from thermal records for the region. The results showed that fish were born later and experienced higher temperatures during the first weeks of life in 2016 than in other years and suggested that exposure to relatively low and high water temperatures had induced development of XY-females and XX-males, respectively, and thus TSD is occurring in wild cobaltcap silverside.
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Report
(4 results)
Research Products
(22 results)
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[Presentation] Temperature-dependent sex determination in wild cobaltcap silverside Hypoatherina tsurugae, an atherinid fish from the Northwest Pacific ocean2018
Author(s)
Yamamoto, Y., Miyoshi, K., Bej, Dilip., Hattori, R.S., Strussmann, C.A.
Organizer
8th International Symposium on Vertebrate Sex Determination
Related Report
Int'l Joint Research
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[Presentation] Development of methods to identify the sex chromosomal genotype (XX, XY, YY) in pejerrey and its application in a field survey of sex-reversals and super-males2016
Author(s)
Yoji Yamamoto, Seiya Tashiro, Ricardo S. Hattori, Yan Zhang, Leandro A. Miranda, Dario C. Colautti, Gustavo E. Berasain, and Carlos A. Strussmann
Organizer
8th International Symposium on Fish Endocrinology
Place of Presentation
Goteborg, Sweden
Related Report
Int'l Joint Research
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