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Early onset of reduced reproductive performance with age in the treecreeper (Certhia familiaris)

Enemar, Anders and Nilsson, Jan-Åke LU (2008) In Journal für Ornithologie1852-12-31+01:002004-01-01+01:00 149(1). p.117-121
Abstract
Reductions in reproductive performance with age have been predicted to result from a general deterioration of performance, i.e. senescence. Variation among species in the onset and rate of this deterioration depends on the age-independent extrinsic mortality rate. If few individuals reach a specific age, the strength of selection for mechanisms that retard senescence will be reduced. The aim of this study was to investigate the age-dependent variation in two reproductive traits in a species, the Treecreeper (Certhia familiaris), with a low between-year survival rate. Clutch size did not vary with age, but egg size decreased from the first to the second breeding season. Compared with published age-dependent reductions in egg size,... (More)
Reductions in reproductive performance with age have been predicted to result from a general deterioration of performance, i.e. senescence. Variation among species in the onset and rate of this deterioration depends on the age-independent extrinsic mortality rate. If few individuals reach a specific age, the strength of selection for mechanisms that retard senescence will be reduced. The aim of this study was to investigate the age-dependent variation in two reproductive traits in a species, the Treecreeper (Certhia familiaris), with a low between-year survival rate. Clutch size did not vary with age, but egg size decreased from the first to the second breeding season. Compared with published age-dependent reductions in egg size, Treecreepers demonstrate the earliest onset of senescence, but they also have the highest total mortality rate, corroborating the predictions from the evolutionary theory of senescence. Production of eggs seems to be demanding for female Treecreepers, as egg size is also positively dependent on ambient temperature, further stressing the vulnerability of this trait for small reductions in female performance. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Age-dependent breeding success - Egg size - Senescence - Treecreeper
in
Journal für Ornithologie1852-12-31+01:002004-01-01+01:00
volume
149
issue
1
pages
117 - 121
publisher
Springer
external identifiers
  • wos:000251592100013
  • scopus:37449002546
ISSN
1439-0361
DOI
10.1007/s10336-007-0255-9
language
English
LU publication?
yes
id
e364b29b-1fa9-4e42-a1bb-dd0e0690cf04 (old id 1413204)
date added to LUP
2009-06-03 14:03:09
date last changed
2017-01-01 05:03:24
@article{e364b29b-1fa9-4e42-a1bb-dd0e0690cf04,
  abstract     = {Reductions in reproductive performance with age have been predicted to result from a general deterioration of performance, i.e. senescence. Variation among species in the onset and rate of this deterioration depends on the age-independent extrinsic mortality rate. If few individuals reach a specific age, the strength of selection for mechanisms that retard senescence will be reduced. The aim of this study was to investigate the age-dependent variation in two reproductive traits in a species, the Treecreeper (Certhia familiaris), with a low between-year survival rate. Clutch size did not vary with age, but egg size decreased from the first to the second breeding season. Compared with published age-dependent reductions in egg size, Treecreepers demonstrate the earliest onset of senescence, but they also have the highest total mortality rate, corroborating the predictions from the evolutionary theory of senescence. Production of eggs seems to be demanding for female Treecreepers, as egg size is also positively dependent on ambient temperature, further stressing the vulnerability of this trait for small reductions in female performance.},
  author       = {Enemar, Anders and Nilsson, Jan-Åke},
  issn         = {1439-0361},
  keyword      = {Age-dependent breeding success - Egg size - Senescence - Treecreeper},
  language     = {eng},
  number       = {1},
  pages        = {117--121},
  publisher    = {Springer},
  series       = {Journal für Ornithologie1852-12-31+01:002004-01-01+01:00},
  title        = {Early onset of reduced reproductive performance with age in the treecreeper (Certhia familiaris)},
  url          = {http://dx.doi.org/10.1007/s10336-007-0255-9},
  volume       = {149},
  year         = {2008},
}