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Evolution of patterned plumage as a sexual signal estrildid finches

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Title: Evolution of patterned plumage as a sexual signal estrildid finches
Authors: Soma, Masayo Browse this author →KAKEN DB
Garamszegi, Laszlo Zsolt Browse this author
Keywords: estrildid finch
phylogenetic comparison
plumage color pattern
sexual signal
Issue Date: May-2018
Publisher: Oxford University Press
Journal Title: Behavioral ecology
Volume: 29
Issue: 3
Start Page: 676
End Page: 685
Publisher DOI: 10.1093/beheco/ary021
Abstract: Color patterns, such as bars or dots that cover the body surface of animals are generally thought to play roles in signaling and camouflage. In birds, however, the macroscopic aspects of plumage coloration are less well understood, as past studies typically described plumage colorations by using spectrophotometric analyses. To provide insight into the evolution of plumage patterns as sexual signals, we characterized interspecific and intersexual variations in the plumage patterns of estrildid finches and tested their associations with other courtship signals and life-history traits using a comparative phylogenetic approach. Our results support the idea that plumage patterns in estrildids are favored by sexual selection because large-sized conspicuous plumage patterns are possessed by species with an elaborate courtship dance. These plumage patterns may also play roles in social signaling because patterns are more conspicuous in species with intraspecific brood parasitism. We predict that pattern traits can be favored by mate choice or intrasexual competition when they can serve as honest indicators of individual condition. As our results are consistent between the sexes, we suggest that the same selective force is acting on the evolution of plumage patterns in males and females in parallel. Finally, we also found a trade-off between large size and vivid color patterns, suggesting that too conspicuous patterns are costly, presumably because of the risk of catching the eyes of potential predators. Therefore, plumage patterns are also shaped by natural selection.
Rights: This is a pre-copyedited, author-produced version of an article accepted for publication in "Behavioral ecology" following peer review. The version of record Behavioral Ecology, Volume 29, Issue 3, 9 May 2018, Pages 676–685 is available online at:
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 相馬 雅代

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