LaMunyon C W, Eisner T
Section of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853-2702.
Proc Natl Acad Sci U S A. 1994 Jul 19;91(15):7081-4. doi: 10.1073/pnas.91.15.7081.
Female Utetheisa ornatrix exercise postcopulatory mate selection, favoring sperm of larger males. Larger males also produce larger spermatophores, raising the question whether males are selected on the basis of body size or the size of their spermatophore. We here present evidence, based on matings in which males were induced to deliver spermatophores disproportionate in size to body mass, that the determinant is spermatophore mass.
雌性华丽金斑蛾会在交配后进行配偶选择，更青睐体型较大雄性的精子。体型较大的雄性也会产生更大的精包，这就引发了一个问题，即雄性是基于体型还是精包大小被选择的。我们在此提供证据，基于诱导雄性排出与体重不成比例大小精包的交配实验，表明决定因素是精包质量。
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