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Do male ornaments signal immunity in the common yellowthroat?

Garvin, Julia C; Dunn, Peter O; Whittingham, Linda A; Steeber, Douglas A and Hasselquist, Dennis LU (2008) In Behavioral Ecology 19(1). p.54-60
Abstract
Male ornaments may advertise genetic benefits to females choosing mates. These benefits may come in the form of genes for resistance to parasites and disease. Thus, females that prefer more ornamented males as mates may receive genes for enhanced immune system function for their offspring. The common yellowthroat (Geothlypis trichas) is the only species to date in which a male plumage ornament (size of the black facial mask) is known to be related to extrapair mating, and extrapair young are more immunocompetent than their within-pair half-sibs (at least in colder years). To investigate whether male mask size signals superior immune function, we examined male ornaments (mask and bib size and color) in relation to measures of overall health... (More)
Male ornaments may advertise genetic benefits to females choosing mates. These benefits may come in the form of genes for resistance to parasites and disease. Thus, females that prefer more ornamented males as mates may receive genes for enhanced immune system function for their offspring. The common yellowthroat (Geothlypis trichas) is the only species to date in which a male plumage ornament (size of the black facial mask) is known to be related to extrapair mating, and extrapair young are more immunocompetent than their within-pair half-sibs (at least in colder years). To investigate whether male mask size signals superior immune function, we examined male ornaments (mask and bib size and color) in relation to measures of overall health (hematocrit) and immune system function (plasma immunoglobulin G [IgG] concentration and cutaneous immune activity). We also investigated the role that testosterone may play in mediating the relationship between ornaments and immunity. Male mask size was correlated positively with IgG level, suggesting that male mask size may indicate humoral immunity. However, mask size was correlated negatively with hematocrit and cutaneous immune activity (our measure of nestling immunocompetence). Bib size and color were not related to these indices of immune function or health. Plasma testosterone level was neither related to immune function or health nor to the expression of male ornaments. These results suggest that there might be a trade-off between immune system components, as well as between immunity and the production or advertisement of male ornaments. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
sexual selection, testosterone, secondary sexual traits, genetic benefits, mate choice, immune system
in
Behavioral Ecology
volume
19
issue
1
pages
54 - 60
publisher
Oxford University Press
external identifiers
  • wos:000252305000007
  • scopus:38149110478
ISSN
1045-2249
DOI
10.1093/beheco/arm099
language
English
LU publication?
yes
id
912c98b6-3626-4286-9d1c-3bd0d8185530 (old id 1200115)
date added to LUP
2008-09-12 11:06:22
date last changed
2017-04-09 03:52:49
@article{912c98b6-3626-4286-9d1c-3bd0d8185530,
  abstract     = {Male ornaments may advertise genetic benefits to females choosing mates. These benefits may come in the form of genes for resistance to parasites and disease. Thus, females that prefer more ornamented males as mates may receive genes for enhanced immune system function for their offspring. The common yellowthroat (Geothlypis trichas) is the only species to date in which a male plumage ornament (size of the black facial mask) is known to be related to extrapair mating, and extrapair young are more immunocompetent than their within-pair half-sibs (at least in colder years). To investigate whether male mask size signals superior immune function, we examined male ornaments (mask and bib size and color) in relation to measures of overall health (hematocrit) and immune system function (plasma immunoglobulin G [IgG] concentration and cutaneous immune activity). We also investigated the role that testosterone may play in mediating the relationship between ornaments and immunity. Male mask size was correlated positively with IgG level, suggesting that male mask size may indicate humoral immunity. However, mask size was correlated negatively with hematocrit and cutaneous immune activity (our measure of nestling immunocompetence). Bib size and color were not related to these indices of immune function or health. Plasma testosterone level was neither related to immune function or health nor to the expression of male ornaments. These results suggest that there might be a trade-off between immune system components, as well as between immunity and the production or advertisement of male ornaments.},
  author       = {Garvin, Julia C and Dunn, Peter O and Whittingham, Linda A and Steeber, Douglas A and Hasselquist, Dennis},
  issn         = {1045-2249},
  keyword      = {sexual selection,testosterone,secondary sexual traits,genetic benefits,mate choice,immune system},
  language     = {eng},
  number       = {1},
  pages        = {54--60},
  publisher    = {Oxford University Press},
  series       = {Behavioral Ecology},
  title        = {Do male ornaments signal immunity in the common yellowthroat?},
  url          = {http://dx.doi.org/10.1093/beheco/arm099},
  volume       = {19},
  year         = {2008},
}