A comparative approach to testing hypotheses for the evolution of sex-biased dispersal in bean beetles

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dc.citation.firstpage4819en_US
dc.citation.issueNumber21en_US
dc.citation.journalTitleEcology and Evolutionen_US
dc.citation.lastpage4828en_US
dc.citation.volumeNumber5en_US
dc.contributor.authorDowney, Michelle H.en_US
dc.contributor.authorSearle, Rebeccaen_US
dc.contributor.authorBellur, Sunilen_US
dc.contributor.authorGeiger, Adamen_US
dc.contributor.authorMaitner, Brian S.en_US
dc.contributor.authorOhm, Johanna R.en_US
dc.contributor.authorTuda, Midorien_US
dc.contributor.authorMiller, Tom E.X.en_US
dc.date.accessioned2016-01-19T19:19:42Zen_US
dc.date.available2016-01-19T19:19:42Zen_US
dc.date.issued2015en_US
dc.description.abstractUnderstanding the selective forces that shape dispersal strategies is a fundamental goal of evolutionary ecology and is increasingly important in changing, human-altered environments. Sex-biased dispersal (SBD) is common in dioecious taxa, and understanding variation in the direction and magnitude of SBD across taxa has been a persistent challenge. We took a comparative, laboratory-based approach using 16 groups (species or strains) of bean beetles (generaﾠAcanthoscelides,ﾠCallosobruchus, andﾠZabrotes, including 10 strains of one species) to test two predictions that emerge from dominant hypotheses for the evolution of SBD: (1) groups that suffer greater costs of inbreeding should exhibit greater SBD in favor of either sex (inbreeding avoidance hypothesis) and (2) groups with stronger local mate competition should exhibit greater male bias in dispersal (kin competition avoidance hypothesis). We used laboratory experiments to quantify SBD in crawling dispersal, the fitness effects of inbreeding, and the degree of polygyny (number of female mates per male), a proxy for local mate competition. While we found that both polygyny and male-biased dispersal were common across bean beetle groups, consistent with the kin competition avoidance hypothesis, quantitative relationships between trait values did not support the predictions. Across groups, there was no significant association between SBD and effects of inbreeding nor SBD and degree of polygyny, using either raw values or phylogenetically independent contrasts. We discuss possible limitations of our experimental approach for detecting the predicted relationships, as well as reasons why single-factor hypotheses may be too simplistic to explain the evolution of SBD.en_US
dc.identifier.citationDowney, Michelle H., Searle, Rebecca, Bellur, Sunil, et al.. "A comparative approach to testing hypotheses for the evolution of sex-biased dispersal in bean beetles." <i>Ecology and Evolution,</i> 5, no. 21 (2015) Wiley: 4819-4828. http://dx.doi.org/10.1002/ece3.1753.en_US
dc.identifier.doihttp://dx.doi.org/10.1002/ece3.1753en_US
dc.identifier.urihttps://hdl.handle.net/1911/87880en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsThis is an open access article under the terms of theﾠCreative Commons AttributionﾠLicense, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.subject.keywordBean beetleen_US
dc.subject.keywordinbreedingen_US
dc.subject.keywordmating systemen_US
dc.subject.keywordpolygynyen_US
dc.subject.keywordsex-biased dispersalen_US
dc.titleA comparative approach to testing hypotheses for the evolution of sex-biased dispersal in bean beetlesen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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