| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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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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