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Basal metabolic rate and energetic cost of thermoregulation among migratory and resident blue tits

Nilsson, Anna LU ; Nilsson, Jan-Åke LU and Alerstam, Thomas LU (2011) In Oikos 120(12). p.1784-1789
Abstract
Metabolic rates may be informative of adaptations to migration or wintering at high latitudes and may therefore be particularly interesting in partial migrants requiring adaptations to both migration and residency. To study the extent of physiological adaptations in migratory and resident blue tits Cyanistes caeruleus during the period of autumn migration in southern Sweden, we measured basal metabolic rate (BMR) and cost of thermoregulation at 0 degrees C (CTR0). In contrast to other migrants en route, migratory blue tits had lower BMR than residents. As migratory blue tits travel extraordinarily slowly on autumn migration and residents suffer from harsher climate and severe competition, residents may need dynamic adjustments that involve... (More)
Metabolic rates may be informative of adaptations to migration or wintering at high latitudes and may therefore be particularly interesting in partial migrants requiring adaptations to both migration and residency. To study the extent of physiological adaptations in migratory and resident blue tits Cyanistes caeruleus during the period of autumn migration in southern Sweden, we measured basal metabolic rate (BMR) and cost of thermoregulation at 0 degrees C (CTR0). In contrast to other migrants en route, migratory blue tits had lower BMR than residents. As migratory blue tits travel extraordinarily slowly on autumn migration and residents suffer from harsher climate and severe competition, residents may need dynamic adjustments that involve larger metabolic costs than migrants. Resident males had lower CTR0 than migrants and resident females. Resident males are socially dominant, which suggests that they have priority of access to food sources during summer and early autumn. They also spend more time on moult, which would give them the time and energy needed for molting into a plumage of higher insulation quality than is possible for migrants and resident females. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Oikos
volume
120
issue
12
pages
1784 - 1789
publisher
Wiley-Blackwell
external identifiers
  • wos:000298093100004
  • scopus:82455174115
ISSN
1600-0706
DOI
10.1111/j.1600-0706.2011.19440.x
project
CAnMove
language
English
LU publication?
yes
id
104c1480-4116-4fa6-8863-d7d86c214842 (old id 2345140)
date added to LUP
2012-02-24 13:04:41
date last changed
2017-01-01 04:18:40
@article{104c1480-4116-4fa6-8863-d7d86c214842,
  abstract     = {Metabolic rates may be informative of adaptations to migration or wintering at high latitudes and may therefore be particularly interesting in partial migrants requiring adaptations to both migration and residency. To study the extent of physiological adaptations in migratory and resident blue tits Cyanistes caeruleus during the period of autumn migration in southern Sweden, we measured basal metabolic rate (BMR) and cost of thermoregulation at 0 degrees C (CTR0). In contrast to other migrants en route, migratory blue tits had lower BMR than residents. As migratory blue tits travel extraordinarily slowly on autumn migration and residents suffer from harsher climate and severe competition, residents may need dynamic adjustments that involve larger metabolic costs than migrants. Resident males had lower CTR0 than migrants and resident females. Resident males are socially dominant, which suggests that they have priority of access to food sources during summer and early autumn. They also spend more time on moult, which would give them the time and energy needed for molting into a plumage of higher insulation quality than is possible for migrants and resident females.},
  author       = {Nilsson, Anna and Nilsson, Jan-Åke and Alerstam, Thomas},
  issn         = {1600-0706},
  language     = {eng},
  number       = {12},
  pages        = {1784--1789},
  publisher    = {Wiley-Blackwell},
  series       = {Oikos},
  title        = {Basal metabolic rate and energetic cost of thermoregulation among migratory and resident blue tits},
  url          = {http://dx.doi.org/10.1111/j.1600-0706.2011.19440.x},
  volume       = {120},
  year         = {2011},
}