| Budget Amount *help |
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2022: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Outline of Final Research Achievements |
The phenomenon of “menopause,” is an extremely rare and evolutionarily stable trait previously observed only in humans and cetaceans. The evolutionary origins of menopause in humans remain poorly understood. Even in chimpanzees and bonobos, the closest living relatives of humans, the presence or absence of menopause remains unresolved. In this study, we conducted a non-invasive analysis of sex hormone dynamics using urine samples collected from wild chimpanzees in the Kalinzu Central Forest Reserve in Uganda and wild bonobos in the Luo Scientific Reserve in the Democratic Republic of the Congo. We investigated age-related changes in sexual physiology and the presence or absence of menopause. The findings were presented at academic conferences, and I contributed to a book chapter on hormone dynamics in wild bonobos.
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