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Context-dependent costs of incubation in the pied flycatcher

Nord, Andreas LU and Nilsson, Jan-Åke LU (2012) In Animal Behaviour 84(2). p.427-436
Abstract
Although previously disputed, it is now clear that the demands from avian incubation put parents under considerable energetic stress, sometimes to an extent where the costs of incubation constrain clutch size evolution. However, the behavioural mechanisms involved in manifesting such costs remain largely unknown. We manipulated the demands of incubation by enlarging and reducing clutch size during 2 years in a pied flycatcher, Ficedula hypoleuca, population in southern Sweden, and measured the resulting effects on incubation temperature and incubation behaviour. In addition, we assessed possible effects on later reproductive stages by restoring clutch size prior to hatching and subsequently monitoring female nest provisioning and nestling... (More)
Although previously disputed, it is now clear that the demands from avian incubation put parents under considerable energetic stress, sometimes to an extent where the costs of incubation constrain clutch size evolution. However, the behavioural mechanisms involved in manifesting such costs remain largely unknown. We manipulated the demands of incubation by enlarging and reducing clutch size during 2 years in a pied flycatcher, Ficedula hypoleuca, population in southern Sweden, and measured the resulting effects on incubation temperature and incubation behaviour. In addition, we assessed possible effects on later reproductive stages by restoring clutch size prior to hatching and subsequently monitoring female nest provisioning and nestling growth rate. The length of both attentive and inattentive bouts, as well as the total time spent incubating, was longer for females incubating enlarged clutches. These females also maintained eggs at lower temperatures, but only at the beginning of incubation. Thus, increased incubation demands were met by investing more time in incubation, but females were still not able to maintain incubation temperature at the same level as control females. Furthermore, females paid costs of increased incubation demands in terms of a longer incubation period in both years, and reduced nestling production in one, but did not appear to transfer any additional costs to their nestlings. We conclude that costs of incubation are context dependent, and suggest that the demands from incubation may be important in brood size determination in this species, at least in deteriorating ambient conditions. (C) 2012 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
brood size determination, cost of reproduction, egg temperature, Ficedula hypoleuca, incubation behaviour, pied flycatcher
in
Animal Behaviour
volume
84
issue
2
pages
427 - 436
publisher
Elsevier
external identifiers
  • wos:000306656000019
  • scopus:84864123406
ISSN
1095-8282
DOI
10.1016/j.anbehav.2012.05.017
language
English
LU publication?
yes
id
398356f2-e4a5-4f43-8981-f6f722ba64f3 (old id 2973148)
date added to LUP
2012-08-23 10:30:52
date last changed
2017-11-19 03:22:14
@article{398356f2-e4a5-4f43-8981-f6f722ba64f3,
  abstract     = {Although previously disputed, it is now clear that the demands from avian incubation put parents under considerable energetic stress, sometimes to an extent where the costs of incubation constrain clutch size evolution. However, the behavioural mechanisms involved in manifesting such costs remain largely unknown. We manipulated the demands of incubation by enlarging and reducing clutch size during 2 years in a pied flycatcher, Ficedula hypoleuca, population in southern Sweden, and measured the resulting effects on incubation temperature and incubation behaviour. In addition, we assessed possible effects on later reproductive stages by restoring clutch size prior to hatching and subsequently monitoring female nest provisioning and nestling growth rate. The length of both attentive and inattentive bouts, as well as the total time spent incubating, was longer for females incubating enlarged clutches. These females also maintained eggs at lower temperatures, but only at the beginning of incubation. Thus, increased incubation demands were met by investing more time in incubation, but females were still not able to maintain incubation temperature at the same level as control females. Furthermore, females paid costs of increased incubation demands in terms of a longer incubation period in both years, and reduced nestling production in one, but did not appear to transfer any additional costs to their nestlings. We conclude that costs of incubation are context dependent, and suggest that the demands from incubation may be important in brood size determination in this species, at least in deteriorating ambient conditions. (C) 2012 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.},
  author       = {Nord, Andreas and Nilsson, Jan-Åke},
  issn         = {1095-8282},
  keyword      = {brood size determination,cost of reproduction,egg temperature,Ficedula hypoleuca,incubation behaviour,pied flycatcher},
  language     = {eng},
  number       = {2},
  pages        = {427--436},
  publisher    = {Elsevier},
  series       = {Animal Behaviour},
  title        = {Context-dependent costs of incubation in the pied flycatcher},
  url          = {http://dx.doi.org/10.1016/j.anbehav.2012.05.017},
  volume       = {84},
  year         = {2012},
}