Blood parasite infection differentially relates to carotenoid-based plumage and bill color in the American goldfinch

Title:
Blood parasite infection differentially relates to carotenoid-based plumage and bill color in the American goldfinch
Authors:
Lumpkin, David C.; Murphy, Troy G.; Tarvin, Keith A.
Abstract:
Male and female American goldfinches (Spinus tristis) express condition-dependent carotenoid-based plumage and bill coloration. Plumage color is relatively static, as pigments incorporated into feathers during the spring molt cannot be mobilized thereafter. In contrast, bill color is dynamic, reflecting changes in condition over short time periods. Previous studies have shown that male and female ornaments, though similar in expression, are differentially related to measures of immunocompetence, suggesting that the relationship between ornamentation and parasite infection may differ between the sexes. In this study, we evaluate the relationship between condition-dependent ornamentation (plumage and bill color) and blood parasite infection in male and female American goldfinches. We captured goldfinches after completion of the pre-alternate molt and prior to the onset of nesting and assessed prevalence of Trypanosoma parasites via blood smears. Plumage color strongly predicted trypanosome infection: Birds with more colorful plumage were less likely to present infections. In contrast, we detected no relationship between infection and bill color, which in other studies has been shown to dynamically reflect current condition. Sex did not affect the relationship between infection status and either ornament. Together, these results suggest that physiological pathways linking carotenoid ornamentation and infection may vary even within a single species.
Citation:
Lumpkin, D.C., T.G. Murphy, and K.A. Tarvin. August 2014. "Blood parasite infection differentially relates to carotenoid-based plumage and bill color in the American goldfinch." Ecology and Evolution 4(16): 3210-3217.
Publisher:
Wiley Open Access
DATE ISSUED:
2014-08
Department:
Biology
Type:
Article
PUBLISHED VERSION:
10.1002/ece3.1164
PERMANENT LINK:
http://hdl.handle.net/11282/566774

Full metadata record

DC FieldValue Language
dc.contributor.authorLumpkin, David C.en
dc.contributor.authorMurphy, Troy G.en
dc.contributor.authorTarvin, Keith A.en
dc.date.accessioned2015-08-13T10:33:46Zen
dc.date.available2015-08-13T10:33:46Zen
dc.date.issued2014-08en
dc.identifier.citationLumpkin, D.C., T.G. Murphy, and K.A. Tarvin. August 2014. "Blood parasite infection differentially relates to carotenoid-based plumage and bill color in the American goldfinch." Ecology and Evolution 4(16): 3210-3217.en
dc.identifier.issn2045-7758en
dc.identifier.urihttp://hdl.handle.net/11282/566774en
dc.description.abstractMale and female American goldfinches (Spinus tristis) express condition-dependent carotenoid-based plumage and bill coloration. Plumage color is relatively static, as pigments incorporated into feathers during the spring molt cannot be mobilized thereafter. In contrast, bill color is dynamic, reflecting changes in condition over short time periods. Previous studies have shown that male and female ornaments, though similar in expression, are differentially related to measures of immunocompetence, suggesting that the relationship between ornamentation and parasite infection may differ between the sexes. In this study, we evaluate the relationship between condition-dependent ornamentation (plumage and bill color) and blood parasite infection in male and female American goldfinches. We captured goldfinches after completion of the pre-alternate molt and prior to the onset of nesting and assessed prevalence of Trypanosoma parasites via blood smears. Plumage color strongly predicted trypanosome infection: Birds with more colorful plumage were less likely to present infections. In contrast, we detected no relationship between infection and bill color, which in other studies has been shown to dynamically reflect current condition. Sex did not affect the relationship between infection status and either ornament. Together, these results suggest that physiological pathways linking carotenoid ornamentation and infection may vary even within a single species.en
dc.language.isoen_USen
dc.publisherWiley Open Accessen
dc.identifier.doi10.1002/ece3.1164en
dc.subject.departmentBiologyen
dc.titleBlood parasite infection differentially relates to carotenoid-based plumage and bill color in the American goldfinchen
dc.typeArticleen
dc.identifier.journalEcology and Evolutionen
dc.subject.keywordAmerican goldfinchen
dc.subject.keywordBill coloren
dc.subject.keywordBlood parasitesen
dc.subject.keywordCarotenoid-based ornamentationen
dc.subject.keywordPlumage coloren
dc.subject.keywordSpinus tristisen
dc.subject.keywordTrypanosomaen
dc.identifier.volume4en
dc.identifier.issue16en
dc.identifier.startpage3210en
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