Advanced

Metabolic rate and thermal conductance of lemmings from high-arctic Canada and Siberia

Klaassen, M; Agrell, Jep LU and Lindström, Åke LU (2002) In Journal of Comparative Physiology B 172(5). p.371-378
Abstract
The arctic climate places high demands on the energy metabolism of its inhabitants. We measured resting (RMR) and basal metabolic rates (BMR), body temperatures, and dry and wet thermal conductances in summer morphs of the lemmings Dicrostonyx groenlandicus and Lemmus trimucronatus in arctic Canada, and the BMR of D. torquatus, D. groenlandicus, L. sibiricus, L. bungei and L. trimucronatus in Siberia. In contrast to previous studies the data were collected on animals that had spent only a limited time in captivity. All parameters were analysed in relation to the variations in body mass (20-90 g). Body temperature and BMR were lower in D. groenlandicus than L. trimucronatus, which coincides with greater longevity in the former species. Wet... (More)
The arctic climate places high demands on the energy metabolism of its inhabitants. We measured resting (RMR) and basal metabolic rates (BMR), body temperatures, and dry and wet thermal conductances in summer morphs of the lemmings Dicrostonyx groenlandicus and Lemmus trimucronatus in arctic Canada, and the BMR of D. torquatus, D. groenlandicus, L. sibiricus, L. bungei and L. trimucronatus in Siberia. In contrast to previous studies the data were collected on animals that had spent only a limited time in captivity. All parameters were analysed in relation to the variations in body mass (20-90 g). Body temperature and BMR were lower in D. groenlandicus than L. trimucronatus, which coincides with greater longevity in the former species. Wet and dry thermal conductances of both species were similar and comparable with those of other Myomorpha (mouse-type rodents), indicating no evidence for a previously claimed lower thermal conductance in lemmings. BMR in lemmings appeared to be higher than in other Arvicolidae (voles, lemmings and muskrats), which could relate to their typically high-latitude distribution. However, the more southerly living Lemmus species had higher BMR than the more northerly living Dicrostonyx species, which may be explained by the former having a relatively low-quality diet. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Comparative Physiology B
volume
172
issue
5
pages
371 - 378
publisher
Springer
external identifiers
  • pmid:12122453
  • wos:000177201800003
  • scopus:0036923285
ISSN
0174-1578
DOI
10.1007/s00360-002-0261-4
language
English
LU publication?
yes
id
6d705981-23b1-4912-b112-83e8df4c35ee (old id 145544)
date added to LUP
2007-06-25 10:19:08
date last changed
2017-01-01 05:06:16
@article{6d705981-23b1-4912-b112-83e8df4c35ee,
  abstract     = {The arctic climate places high demands on the energy metabolism of its inhabitants. We measured resting (RMR) and basal metabolic rates (BMR), body temperatures, and dry and wet thermal conductances in summer morphs of the lemmings Dicrostonyx groenlandicus and Lemmus trimucronatus in arctic Canada, and the BMR of D. torquatus, D. groenlandicus, L. sibiricus, L. bungei and L. trimucronatus in Siberia. In contrast to previous studies the data were collected on animals that had spent only a limited time in captivity. All parameters were analysed in relation to the variations in body mass (20-90 g). Body temperature and BMR were lower in D. groenlandicus than L. trimucronatus, which coincides with greater longevity in the former species. Wet and dry thermal conductances of both species were similar and comparable with those of other Myomorpha (mouse-type rodents), indicating no evidence for a previously claimed lower thermal conductance in lemmings. BMR in lemmings appeared to be higher than in other Arvicolidae (voles, lemmings and muskrats), which could relate to their typically high-latitude distribution. However, the more southerly living Lemmus species had higher BMR than the more northerly living Dicrostonyx species, which may be explained by the former having a relatively low-quality diet.},
  author       = {Klaassen, M and Agrell, Jep and Lindström, Åke},
  issn         = {0174-1578},
  language     = {eng},
  number       = {5},
  pages        = {371--378},
  publisher    = {Springer},
  series       = {Journal of Comparative Physiology B},
  title        = {Metabolic rate and thermal conductance of lemmings from high-arctic Canada and Siberia},
  url          = {http://dx.doi.org/10.1007/s00360-002-0261-4},
  volume       = {172},
  year         = {2002},
}