Abstract
Previously, we showed that virgin males of Papilio machaondeliver ejaculates that are twice as big as any ejaculates they transfer at later matings. Here, we investigate the consequences of these two size classes of ejaculates on female reproductive output and demonstrate that females that received one small ejaculate laid as many eggs, fertilized the same proportion of eggs, and lived as long as those that had received one big ejaculate. However, females that received big ejaculates laid heavier eggs, but only between the twelfth and the fifteenth days of egg-laying. We conclude that male-derived nutrients appear to have a limited effect on female reproductive output in P. machaonand that the large size of ejaculates delivered by male butterflies are determined primarily by selection on males to produce longer refractory periods in females.
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Svärd, L., Wiklund, C. The effect of ejaculate mass on female reproductive output in the european swallowtail butterfly,Papilio machaon (L.) (Lepidoptera: Papilionidae). J Insect Behav 4, 33–41 (1991). https://doi.org/10.1007/BF01092549
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DOI: https://doi.org/10.1007/BF01092549