Convergent Gains of Red Carotenoid-Based Coloration in the New World Blackbirds

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dc.contributor.authorFriedman, Nicholas R.
dc.contributor.authorKiere, Lynna M.
dc.contributor.authorOmland, Kevin E.
dc.date.accessioned2018-11-09T17:35:52Z
dc.date.available2018-11-09T17:35:52Z
dc.date.issued2011-08-19
dc.description.abstractMany birds have colorful plumage ornaments that utilize carotenoid pigments, and these are often displayed in signaling contexts. Researchers in behavioral ecology have focused on examining carotenoids in general, and red carotenoids in particular, because they may be an honest index of individual condition or quality. However, few studies have examined the evolutionary changes in carotenoid-based coloration across a phylogeny. We used reflectance spectrometry to examine carotenoid-based coloration across the New World blackbirds (Icteridae). We scored discrete character states based on these measurements and mapped them onto the icterid phylogeny. Our results indicate that red coloration has been gained six times in the blackbirds from a common ancestor that exhibited yellow ornamentation. This result was supported by both parsimony and likelihood methods of ancestral state reconstruction and by each of three different scoring methods. Thus, multiple lineages of icterids have convergently evolved red patches from a common ancestor that most likely used yellow. Several other studies have observed repeated gains of red coloration, which suggests that our observations may reflect a directional trend common among avian clades.en_US
dc.description.sponsorshipWe thank S. Lanyon and K.Barker for allowing us the use of their phylogeny for the Icteridae. K.E.O. was supported by a National Science Foundation CAREER grant DEB-0347083.en_US
dc.description.urihttp://americanornithologypubs.org/doi/pdf/10.1525/auk.2011.11117en_US
dc.format.extent10 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/M22R3P16M
dc.identifier.citationNicholas R. Friedman Lynna M. Kiere and Kevin E. Omland, Convergent Gains of Red Carotenoid-Based Coloration in the New World Blackbirds, The Auk 128(4):678-687. 2011, https://doi.org/10.1525/auk.2011.11117en_US
dc.identifier.urihttps://doi.org/10.1525/auk.2011.11117
dc.identifier.urihttp://hdl.handle.net/11603/11934
dc.language.isoen_USen_US
dc.publisherAmerican Ornithological Societyen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Biological Sciences Department Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsAttribution-NonCommercial-NoDerivs 2.0 Generic (CC BY-NC-ND 2.0)*
dc.rights© The American Ornithologists’ Union, 2008
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/2.0/*
dc.subjectancestral state reconstructionen_US
dc.subjectcarotenoidsen_US
dc.subjectconvergent evolutionen_US
dc.subjectIcteridaeen_US
dc.subjectplumage colorationen_US
dc.titleConvergent Gains of Red Carotenoid-Based Coloration in the New World Blackbirdsen_US
dc.typeTexten_US

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