Different ornaments signal male health and MHC variation in two populations of a warbler

Molecular Ecology
Linda A WhittinghamPeter O Dunn

Abstract

Male traits that signal health and vigour are used by females to choose better quality mates, but in some cases the male trait selected by females differs among populations. Multiple male traits can be maintained through female mate choice if both traits are equally honest indicators of male quality, but tests of this prediction are rare. By choosing males based on such traits, females could gain direct benefits from males (assistance with parental care), but when females choose extra-pair mates based on these traits, females gain only male sperm, and potentially indirect genetic benefits for their offspring. In common yellowthroats (Geothylpis trichas), female choice of extra-pair mates targets two different plumage ornaments: the black mask in a Wisconsin population and the yellow bib in a New York population. Previously, we found that the black mask in Wisconsin is related to greater major histocompatibility complex (MHC) class II variation, which in turn signals better survival and disease resistance. In this study, we examined the signalling function of the yellow bib in New York to test whether it signals the same aspects of male quality as the black mask in Wisconsin. As predicted, we found that the yellow bib in New Yor...Continue Reading

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Citations

Oct 9, 2015·Nature·Amy Maxmen
Jul 28, 2016·Biological Reviews of the Cambridge Philosophical Society·Rebecca E KochGeoffrey E Hill
Feb 19, 2017·Molecular Ecology·Catherine E GrueberBruce C Robertson
Nov 10, 2017·Biology Letters·J W G SladeE A MacDougall-Shackleton
Apr 26, 2018·Molecular Ecology·László Zsolt GaramszegiSándor Zsebők
Jul 25, 2019·The Journal of Animal Ecology·Li SunSheng-Guo Fang
Oct 7, 2018·Oecologia·Corey R Freeman-Gallant, Conor C Taff

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