Mate fidelity, senescence in breeding performance and reproductive trade-offs in the barn swallow
Article first published online: 19 APR 2002
Journal of Animal Ecology
Volume 71, Issue 2, pages 309–319, March 2002
How to Cite
Saino, N., Ambrosini, R., Martinelli, R. and Møller, A. P. (2002), Mate fidelity, senescence in breeding performance and reproductive trade-offs in the barn swallow. Journal of Animal Ecology, 71: 309–319. doi: 10.1046/j.1365-2656.2002.00600.x
- Issue published online: 19 APR 2002
- Article first published online: 19 APR 2002
- Received 11 January 2001; revison received 20 November 2001
- Hirundo rustica;
- maternal effects;
- 1Senescence is defined as the decline in performance with age, and can be determined by diverse mechanisms such as accumulation of mutations, ‘wear and tear’ and antagonistic pleiotropy. Animals can mitigate the negative effects of senescence on reproductive performance by acquiring experience as they age.
- 2We analysed the effect of age on clutch size, breeding date, fledging success and offspring quality (morphology and T cell-mediated immunity) of barn swallows (Hirundo rustica, Linnaeus) by comparing the progeny of individuals of known age during consecutive years.
- 3Reproductive performance had no significant effect on probability of divorce, and adults that re-mated with each other had no reproductive advantage.
- 4Body size, feather development and T cell-mediated immunity declined with paternal and/or maternal age already after the first breeding season. Body mass declined after paternal age of two years. T cell-mediated immunity of nestlings in one year covaried negatively with that of their siblings the previous year.
- 5Hence, barn swallows suffer an age-dependent decline in offspring quality, and apparently trade quality of current offspring against that of subsequent reproductive events, although causality of this relationship could not be assessed in this correlational study.