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- W3199034340 abstract "Abstract Different reproductive modes are characterized by costs and benefits which often depend on ecological contexts. Benefits of sex are expected to increase under complex biotic interactions, whereas parthenogenesis can be beneficial for reproductive assurance when females are mate limited. Here, we study how different ecological contexts influence the frequency of sex or parthenogenesis in the facultatively parthenogenetic mayfly Alainites muticus . We first verified that high parthenogenetic frequencies translate into female-biased population sex ratios. We then measured the population sex ratio (a proxy for parthenogenetic capacities), density of individuals (mate limitation) and community diversity (biotic interaction complexity) for 159 A. muticus populations, and used structural equation modeling to investigate their direct and indirect influences on sex ratios. We found no effect of community diversity or altitude on sex ratios. Furthermore, even when females can reproduce parthenogenetically, they generally reproduce sexually, indicating that the benefits of sex exceed its costs in most situations. Sex ratios become female-biased in low population densities, as expected if mate limitation selects for parthenogenesis. Mate limitation might be widespread in mayflies because of their very short adult lifespan and limited dispersal, which can generate strong selection for reproductive assurance and may provide a steppingstone towards obligate parthenogenesis." @default.
- W3199034340 created "2021-09-27" @default.
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- W3199034340 date "2021-09-11" @default.
- W3199034340 modified "2023-09-26" @default.
- W3199034340 title "What ecological factors favor parthenogenesis over sexual reproduction? A study on the facultatively parthenogenetic mayfly <i>Alainites muticus</i> in natural populations" @default.
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- W3199034340 doi "https://doi.org/10.1101/2021.09.10.459770" @default.
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