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

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dc.citation.firstpage4819
dc.citation.issueNumber21
dc.citation.journalTitleEcology and Evolution
dc.citation.lastpage4828
dc.citation.volumeNumber5
dc.contributor.authorDowney, Michelle H.
dc.contributor.authorSearle, Rebecca
dc.contributor.authorBellur, Sunil
dc.contributor.authorGeiger, Adam
dc.contributor.authorMaitner, Brian S.
dc.contributor.authorOhm, Johanna R.
dc.contributor.authorTuda, Midori
dc.contributor.authorMiller, Tom E.X.
dc.date.accessioned2016-01-19T19:19:42Z
dc.date.available2016-01-19T19:19:42Z
dc.date.issued2015
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.
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.
dc.identifier.doihttp://dx.doi.org/10.1002/ece3.1753
dc.identifier.urihttps://hdl.handle.net/1911/87880
dc.language.isoeng
dc.publisherWiley
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.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject.keywordBean beetle
dc.subject.keywordinbreeding
dc.subject.keywordmating system
dc.subject.keywordpolygyny
dc.subject.keywordsex-biased dispersal
dc.titleA comparative approach to testing hypotheses for the evolution of sex-biased dispersal in bean beetles
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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