Elisabeth Harley, Leanna M. Birge, Jennifer Small, Samuel J. Tazzyman, Andrew Pomiankowski and Kevin Fowler Ejaculate investment and attractiveness in the stalk-eyed fly, Diasemopsis meigenii Ecology and Evolution 3
Male attractiveness in stalk-eyed flies (large eyespan) is not associated with greater ejaculate transfer (spermatophore size or sperm number), despite attractive males having bigger testes and accessory glands. This does not support the hypothesis that females gain fertility benefits from mating with attractive males. Such males appear to restrict ejaculate allocation per mating so as to participate in a greater number of mating events.
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