Coevolution of parental investment and sexually selected traits drives sex-role divergence
Fromhage, Lutz; Jennions, Michael D. (2016). Coevolution of parental investment and sexually selected traits drives sex-role divergence. Nature Communications, 7 (0), 12517. DOI: 10.1038/ncomms12517
Published inNature Communications
© the Authors, 2016. This is an open access article distributed under the terms of a Creative Commons Attribution 4.0 International License.
Sex-role evolution theory attempts to explain the origin and direction of male-female differences. A fundamental question is why anisogamy, the difference in gamete size that defines the sexes, has repeatedly led to large differences in subsequent parental care. Here we construct models to confirm predictions that individuals benefit less from caring when they face stronger sexual selection and/or lower certainty of parentage. However, we overturn the widely cited claim that a negative feedback between the operational sex ratio and the opportunity cost of care selects for egalitarian sex roles. We further argue that our model does not predict any effect of the adult sex ratio (ASR) that is independent of the source of ASR variation. Finally, to increase realism and unify earlier models, we allow for co-evolution between parental investment and investment in sexually selected traits. Our model confirms that small initial differences in parental investment tend to increase due to positive evolutionary feedback, formally supporting long-standing, but unsubstantiated, verbal arguments. © The Author(s) 2016. ...
PublisherNature Publishing Group
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland
Funding program(s)Research costs of Academy Research Fellow, AoF
Additional information about fundingAcademy of Finland (L.F.; grant 283486)
Except where otherwise noted, this item's license is described as © the Authors, 2016. This is an open access article distributed under the terms of a Creative Commons Attribution 4.0 International License.
Showing items with similar title or keywords.
The relative roles of natural and sexual selection in the evolution of tardigrade gamete morphology Ryndov, Serge (2021)Siittiösolut ovat eläinkunnassa esiintyvistä solutyypeistä monimuotoisin ryhmä. Siittiösoluissa esiintyvän muuntelun on useissa eläintaksoneissa havaittu olevan yhteydessä parittelun jälkeisen seksuaalivalinnan tasoon sekä ...
Uusi-Heikkilä, Silva (Wiley-Blackwell, 2020)Fisheries often combine high mortality with intensive size‐selectivity and can, thus, be expected to reduce body size and size variability in exploited populations. In many fish species, body size is a sexually selected ...
Fox, Rebecca J.; Fromhage, Lutz; Jennions, Michael D. (2019)In a rapidly changing environment, does sexual selection on males elevate a population's reproductive output? If so, does phenotypic plasticity enhance or diminish any such effect? We outline two routes by which sexual ...
Jennions, Michael D.; Fromhage, Lutz (Royal Society, 2017)The term ‘sex roles’ encapsulates male–female differences in mate searching, competitive traits that increase mating/fertilization opportunities, choosiness about mates and parental care. Theoretical models suggest that ...
Gerber, Nina; Kokko, Hanna; Ebert, Dieter; Booksmythe, Isobel (The Royal Society Publishing, 2018)The timing of sex in facultatively sexual organisms is critical to fitness, due to the differing demographic consequences of sexual versus asexual reproduction. In addition to the costs of sex itself, an association of sex ...