The processes and mechanisms of organ-number evolution : a comprehensive case study for insect genital structures
| Project/Area Number |
19770046
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Morphology/Structure
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| Research Institution | Keio University (2008-2009)
Hokkaido University (2007) |
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Principal Investigator |
KAMIMURA Yoshitaka Keio University, 商学部, 専任講師 (50366952)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥2,720,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥420,000)
Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | 昆虫 / 形態進化 / 交尾器形態 / 繁殖生態学 / 器官形成 / 器官の数の進化 / 生物多様性 / 繁殖生態 / 性選択 |
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| Research Abstract |
The number of organs varies among animal taxa. However, due to their scarcity, we have a poor understanding of why and how the number of organs evolutionarily changes. In the present study, a comprehensive information gathering has conducted about evolutionary changes in the numbers of insect reproductive/genital components. As a result, evolutionary changes in the number of male gonopore have been estimated to be occurred in at least seven insect orders. In addition to branching, degeneration, and fusion processes, "transfer of function" has been detected as a novel type of mechanisms for the evolution of organ number.
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Report
(4 results)
Research Products
(14 results)
