2009 Fiscal Year Final Research Report
Influences of female and male parents on adaptive manipulation of offspring sex ratios
| Project/Area Number |
19570015
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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 | Tokyo Gakugei University |
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Principal Investigator |
KARINO Kenji Tokyo Gakugei University, 教育学部, 准教授 (40293005)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 行動生態 / 性比 / 性淘汰 / 産子調節 / 配偶者選択 / 性的魅力 |
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| Research Abstract |
In the guppy Poecilia reticulata, females that mated with attractive males produced offspring with more male-biased sex ratios than those that mated with less attractive males. Since sexual attractiveness of male guppies is a heritable trait, such manipulation of offspring sex ratios depending on male attractiveness may be adaptive. In order to clarify whether female or male parents execute the offspring sex ratio manipulation, an examination in which the relative attractiveness of males was manipulated was conducted. Results of this study indicate that female parents have responsible for offspring sex ratio manipulation.
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