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Individual quality and reproductive effort mirrored in white wing plumage in both sexes of south polar skuas

Hanssen, Sveinn Are; Bustnes, Jan O.; Tveraa, Torkild; Hasselquist, Dennis LU ; Varpe, Oystein and Henden, John-Andre (2009) In Behavioral Ecology 20(5). p.961-966
Abstract
It is well established that female choice may lead to sexual selection on quality-revealing ornaments in males. However, in many species, both sexes display conspicuous characters, which may reflect individual quality and condition. We examined the correlations between measures of individual condition, reproductive performance and variation in size and whiteness of white wing patches in both sexes of the south polar skua (Catharacta maccormicki). Females with a whiter patch had a lower mean clutch size and higher survival, and males with whiter patches had higher immune responses against the injected immunogen tetanus. Birds with a larger white patch, on the other hand, had a higher mass loss, and females with large white patches laid... (More)
It is well established that female choice may lead to sexual selection on quality-revealing ornaments in males. However, in many species, both sexes display conspicuous characters, which may reflect individual quality and condition. We examined the correlations between measures of individual condition, reproductive performance and variation in size and whiteness of white wing patches in both sexes of the south polar skua (Catharacta maccormicki). Females with a whiter patch had a lower mean clutch size and higher survival, and males with whiter patches had higher immune responses against the injected immunogen tetanus. Birds with a larger white patch, on the other hand, had a higher mass loss, and females with large white patches laid larger eggs and had reduced survival probability. Thus, variation in 2 measured aspects of the wing patches in the south polar skua seems to mirror a gradient of reproductive investment strategies; from 1) reduced reproductive investment, better immune defense, and higher survival in birds with more intensely white wing patches to 2) high reproductive investment but survival costs in birds with larger patches. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
diphtheria, immune function, male, sexual selection, ornament, female, tetanus
in
Behavioral Ecology
volume
20
issue
5
pages
961 - 966
publisher
Oxford University Press
external identifiers
  • wos:000269956400008
  • scopus:70349452085
ISSN
1045-2249
DOI
10.1093/beheco/arp084
language
English
LU publication?
yes
id
053bcc93-1fa6-452a-b0e6-e7dbb586c287 (old id 1490789)
date added to LUP
2009-10-19 11:11:14
date last changed
2017-05-28 03:50:57
@article{053bcc93-1fa6-452a-b0e6-e7dbb586c287,
  abstract     = {It is well established that female choice may lead to sexual selection on quality-revealing ornaments in males. However, in many species, both sexes display conspicuous characters, which may reflect individual quality and condition. We examined the correlations between measures of individual condition, reproductive performance and variation in size and whiteness of white wing patches in both sexes of the south polar skua (Catharacta maccormicki). Females with a whiter patch had a lower mean clutch size and higher survival, and males with whiter patches had higher immune responses against the injected immunogen tetanus. Birds with a larger white patch, on the other hand, had a higher mass loss, and females with large white patches laid larger eggs and had reduced survival probability. Thus, variation in 2 measured aspects of the wing patches in the south polar skua seems to mirror a gradient of reproductive investment strategies; from 1) reduced reproductive investment, better immune defense, and higher survival in birds with more intensely white wing patches to 2) high reproductive investment but survival costs in birds with larger patches.},
  author       = {Hanssen, Sveinn Are and Bustnes, Jan O. and Tveraa, Torkild and Hasselquist, Dennis and Varpe, Oystein and Henden, John-Andre},
  issn         = {1045-2249},
  keyword      = {diphtheria,immune function,male,sexual selection,ornament,female,tetanus},
  language     = {eng},
  number       = {5},
  pages        = {961--966},
  publisher    = {Oxford University Press},
  series       = {Behavioral Ecology},
  title        = {Individual quality and reproductive effort mirrored in white wing plumage in both sexes of south polar skuas},
  url          = {http://dx.doi.org/10.1093/beheco/arp084},
  volume       = {20},
  year         = {2009},
}