Dingemanse, Niels J
Duckworth, Renée A
Kiere, Lynna Marie
AffiliationUniv Arizona, Dept Ecol & Evolutionary Biol
MetadataShow full item record
PublisherPUBLIC LIBRARY SCIENCE
CitationWang D, Forstmeier W, Valcu M, Dingemanse NJ, Bulla M, Both C, et al. (2019) Scrutinizing assortative mating in birds. PLoS Biol 17(2): e3000156. https://doi.org/10.1371/journal.pbio.3000156
Rights© 2019 Wang et al. This is an open access article distributed under the terms of the Creative Commons Attribution License.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractIt is often claimed that pair bonds preferentially form between individuals that resemble one another. Such assortative mating appears to be widespread throughout the animal kingdom. Yet it is unclear whether the apparent ubiquity of assortative mating arises primarily from mate choice ("like attracts like"), which can be constrained by same-sex competition for mates; from spatial or temporal separation; or from observer, reporting, publication, or search bias. Here, based on a conventional literature search, we find compelling meta-analytical evidence for size-assortative mating in birds (r = 0.178, 95% CI 0.142-0.215, 83 species, 35,591 pairs). However, our analyses reveal that this effect vanishes gradually with increased control of confounding factors. Specifically, the effect size decreased by 42% when we used previously unpublished data from nine long-term field studies, i.e., data free of reporting and publication bias (r = 0.103, 95% CI 0.074-0.132, eight species, 16,611 pairs). Moreover, in those data, assortative mating effectively disappeared when both partners were measured by independent observers or separately in space and time (mean r = 0.018, 95% CI -0.016-0.057). Likewise, we also found no evidence for assortative mating in a direct experimental test for mutual mate choice in captive populations of Zebra finches (r = -0.020, 95% CI -0.148-0.107, 1,414 pairs). These results highlight the importance of unpublished data in generating unbiased meta-analytical conclusions and suggest that the apparent ubiquity of assortative mating reported in the literature is overestimated and may not be driven by mate choice or mating competition for preferred mates.
NoteOpen access journal
VersionFinal published version
SponsorsMax Planck Society; China Scholarship Council (CSC); Universidad Nacional Autonoma de Mexico (PAPIIT) [IN211491, IN-200702-3, IN206610-3, IN205313]; Consejo Nacional de Cienciay Tecnologia (CONACYT) [81823, 47599, 34500-V, 4722-N9407, D112-903581, 31973H, 104313]; National Geographic Society; US National Science Foundation [DEB-0918095, DEB-1350107]; VIDI-grant from the Netherlands Organisation for Scientific Research (NWO); Academy of Finland ; Czech Science Foundation [15-11782S]; EU Horizon 2020 Marie Curie individual fellowship [4231.1 SocialJetLag]; Czech University of Life Sciences [CIGA 2018421]
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