| Budget Amount *help |
¥45,110,000 (Direct Cost: ¥34,700,000、Indirect Cost: ¥10,410,000)
Fiscal Year 2023: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2022: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2021: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2020: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2019: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
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| Outline of Final Research Achievements |
This project consists of multiyear field surveys and laboratory experiments to assess the usefulness of atheriniform fishes, which are prone to temperature-induced reproductive disorders, as early indicators of the impacts of global warming and climate change on fish reproduction. The results showed that exposure to high temperature and short photoperiod during the critical period of gonadal sex determination induce masculinization while low temperature causes feminization in these fishes. This study also characterized several genetic markers for early detection of reproductive disorders and developed an algorithm for accurate estimation of the surface water temperatures remotely from satellite data. In conclusion, this research demonstrated the usefulness of atheriniform fishes as early warning indicators of the impacts of global warming and climate change on fish reproduction and developed core technologies that will contribute to improving the accuracy of impact assessments.
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