| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
Male and female reproductive strategies are likely to coevolve through sperm transfer. While most existing theories examine the strategies of either sex, “sperm economy theory” investigates the interaction of the two sexes’ strategies. In the present project, we focused on sex ratios in the populations, which are predicted to influence of the evolution of the strategies, and empirically examined the predictions of the theory in a parasitoid wasp, a lady bird, and a butterfly species. We also develop a theoretical model to apply the theory to the situation with nuptial gifts.
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