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Sexual selection theory predicts a trade‐off between premating (ornaments and armaments) and postmating (testes and ejaculates) sexual traits, assuming that growing and maintaining these traits is costly and that total reproductive investments are limited. The number of males in competition, the reproductive gains from investing in premating sexual traits, and the level of sperm competition are all...
Variation in sexual size dimorphism (SSD) is a widespread phenomenon and is commonly attributed to variation in sex-specific patterns of selection. According to Rensch’s rule, SSD increases with increasing body size when males are the larger sex, and decreases when females are the larger sex. Using data from 17 populations of Andrew’s toad (Bufo andrewsi), we tested whether the patterns of SSD conform...
In amphibians, theory predicts that male mate choice with respect to female body size can be expected to occur when female fecundity is related to body size and when the time and energy invested into one mating are relatively large. Based on experimental observations, we tested whether male mate choice occurs in a population of the Andrew’s toad (Bufo andrewsi), a species in which both assumptions...
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