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Strategic female reproductive investment in relation to male attractiveness in birds

Horvathova, Terezia; Nakagawa, Shinichi and Uller, Tobias LU (2011) In Royal Society of London. Proceedings B. Biological Sciences 272(1726). p.163-170
Abstract
Life-history theory predicts that individuals should adjust their reproductive effort according to the expected fitness returns on investment. Because sexually selected male traits should provide honest information about male genetic or phenotypic quality, females may invest more when paired with attractive males. However, there is substantial disagreement in the literature whether such differential allocation is a general pattern. Using a comparative meta-regression approach, we show that female birds generally invest more into reproduction when paired with attractive males, both in terms of egg size and number as well as food provisioning. However, whereas females of species with bi-parental care tend to primarily increase the number of... (More)
Life-history theory predicts that individuals should adjust their reproductive effort according to the expected fitness returns on investment. Because sexually selected male traits should provide honest information about male genetic or phenotypic quality, females may invest more when paired with attractive males. However, there is substantial disagreement in the literature whether such differential allocation is a general pattern. Using a comparative meta-regression approach, we show that female birds generally invest more into reproduction when paired with attractive males, both in terms of egg size and number as well as food provisioning. However, whereas females of species with bi-parental care tend to primarily increase the number of eggs when paired with attractive males, females of species with female-only care produce larger, but not more, eggs. These patterns may reflect adaptive differences in female allocation strategies arising from variation in the signal content of sexually selected male traits between systems of parental care. In contrast to reproductive effort, female allocation of immune-stimulants, anti-oxidants and androgens to the egg yolk was not consistently increased when mated to attractive males, which probably reflects the context-dependent costs and benefits of those yolk compounds to females and offspring. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Royal Society of London. Proceedings B. Biological Sciences
volume
272
issue
1726
pages
163 - 170
publisher
Royal Society
external identifiers
  • scopus:81855224802
ISSN
1471-2954
DOI
10.1098/rspb.2011.0663
language
English
LU publication?
no
id
4728ad21-c31d-49d4-87dc-767b2726a381 (old id 4739008)
date added to LUP
2014-11-10 11:41:45
date last changed
2017-10-22 04:07:32
@article{4728ad21-c31d-49d4-87dc-767b2726a381,
  abstract     = {Life-history theory predicts that individuals should adjust their reproductive effort according to the expected fitness returns on investment. Because sexually selected male traits should provide honest information about male genetic or phenotypic quality, females may invest more when paired with attractive males. However, there is substantial disagreement in the literature whether such differential allocation is a general pattern. Using a comparative meta-regression approach, we show that female birds generally invest more into reproduction when paired with attractive males, both in terms of egg size and number as well as food provisioning. However, whereas females of species with bi-parental care tend to primarily increase the number of eggs when paired with attractive males, females of species with female-only care produce larger, but not more, eggs. These patterns may reflect adaptive differences in female allocation strategies arising from variation in the signal content of sexually selected male traits between systems of parental care. In contrast to reproductive effort, female allocation of immune-stimulants, anti-oxidants and androgens to the egg yolk was not consistently increased when mated to attractive males, which probably reflects the context-dependent costs and benefits of those yolk compounds to females and offspring.},
  author       = {Horvathova, Terezia and Nakagawa, Shinichi and Uller, Tobias},
  issn         = {1471-2954},
  language     = {eng},
  number       = {1726},
  pages        = {163--170},
  publisher    = {Royal Society},
  series       = {Royal Society of London. Proceedings B. Biological Sciences},
  title        = {Strategic female reproductive investment in relation to male attractiveness in birds},
  url          = {http://dx.doi.org/10.1098/rspb.2011.0663},
  volume       = {272},
  year         = {2011},
}