2012 Fiscal Year Final Research Report
An empirical study for clarifying roles of sexual selections in evolution of male traits of fiddler crabs using robots.
| Project/Area Number |
22570027
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Ecology/Environment
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| Research Institution | Iwate Medical University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
ASAMI Takahiro 信州大学, 理学部, 教授 (10222598)
MURAI Minoru 琉球大学, 熱帯生物圏研究センター, 名誉教授 (80117267)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 行動生態 / 左右不相称 / 同性間淘汰 / 配偶者選択 |
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| Research Abstract |
Field observations and experiments were conducted for fiddler crabs (genus Uca) with some comparisons in morphology of their chelae in order to clarify the effects of intra- and inter-sexual selections on evolutions of sexual ornaments and of the laterality. Although the experiments using robots that mimic courtship behaviors of crabs have been incomplete, we found that fights between hetero-claw males tend to last longer than those between homo-claw males in Uca lactea that exhibits developed social behaviors. The disagreement of this result for U. lactea with that for U. vomerisas well as difference in morphology of chelae between the species indicates that the mechanism for maintaining the laterality would differ between Uca species.
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