| Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Outline of Final Research Achievements |
The author propose a new hypothesis that sexual traits of females evolve for mate choice with controlling male behaviours. This hypothesis was tested in a freshwater goby Rhinogobius kurodai which females exhibit blue nuptial color in aquariums with controlled light color condition. In contrast to blue light color aquarium (BLCA) where visual confirmation of the female blue nuptial color was low, in natural light color aquarium (NLCA), the number of males encountering females was high. In BLCA, females preferentially mated with larger males. On the other hand, in NLCA females preferred large males with high condition factor. These results suggest that female nuptial coloration increase an opportunity of encounter with potential mates, and females are able to adequately choose mates based on multiple traits of males. This study concludes that evolution of sexual traits of females can be explained in the context of female mate choice, which is traditional theory of sexual selection.
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