Advanced

Do common frogs (Rana temporaria) follow Bergmann's rule?

Laugen, A T; Laurila, A; Jönsson, Ingemar LU ; Söderman, F and Merilä, J (2005) In Evolutionary Ecology Research 7(5). p.717-731
Abstract
Questions: Does intraspecific extension of Bergmann's rule - larger size within a species in cooler areas - hold true for ectotherms in general, and for the common frog (Rana temporaria) in particular? What is the relative importance of genetic and environmental factors (i.e. direct environmental induction) in determining latitudinal patterns of body size variation in common frogs? Methods: We tested for a positive association between mean body size and latitude in common frogs (Rana temporaria) across a 1600 km long latitudinal gradient in Scandinavia both for wild-collected adults and laboratory-reared metamorphs. Results: In adults, the mean body size increased from south to mid-latitudes, and declined thereafter. This occurred despite... (More)
Questions: Does intraspecific extension of Bergmann's rule - larger size within a species in cooler areas - hold true for ectotherms in general, and for the common frog (Rana temporaria) in particular? What is the relative importance of genetic and environmental factors (i.e. direct environmental induction) in determining latitudinal patterns of body size variation in common frogs? Methods: We tested for a positive association between mean body size and latitude in common frogs (Rana temporaria) across a 1600 km long latitudinal gradient in Scandinavia both for wild-collected adults and laboratory-reared metamorphs. Results: In adults, the mean body size increased from south to mid-latitudes, and declined thereafter. This occurred despite the fact that the mean age of adult frogs increased with increasing latitude, and age and body size were positively correlated. The latitudinal pattern of body size variation in metamorphs reared in a common garden experiment was similar to that observed among wild-caught adults. Conclusions: The results suggest that the concave pattern of body size variation across the latitudinal cline may be at least partly genetically determined, and that although there is considerable geographic variation in mean body size of R. temporaria, this variation does not conform with Bergmann's rule. (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
Evolutionary Ecology Research
volume
7
issue
5
pages
717 - 731
publisher
Evolutionary Ecology Ltd
external identifiers
  • wos:000229946600005
ISSN
1522-0613
language
English
LU publication?
yes
id
a2614372-5e19-4a7f-8876-946f551aec0e (old id 147404)
alternative location
http://www.evolutionary-ecology.com/issues/v07n05/ggar1836.pdf
date added to LUP
2007-07-03 13:36:41
date last changed
2016-04-16 03:06:01
@article{a2614372-5e19-4a7f-8876-946f551aec0e,
  abstract     = {Questions: Does intraspecific extension of Bergmann's rule - larger size within a species in cooler areas - hold true for ectotherms in general, and for the common frog (Rana temporaria) in particular? What is the relative importance of genetic and environmental factors (i.e. direct environmental induction) in determining latitudinal patterns of body size variation in common frogs? Methods: We tested for a positive association between mean body size and latitude in common frogs (Rana temporaria) across a 1600 km long latitudinal gradient in Scandinavia both for wild-collected adults and laboratory-reared metamorphs. Results: In adults, the mean body size increased from south to mid-latitudes, and declined thereafter. This occurred despite the fact that the mean age of adult frogs increased with increasing latitude, and age and body size were positively correlated. The latitudinal pattern of body size variation in metamorphs reared in a common garden experiment was similar to that observed among wild-caught adults. Conclusions: The results suggest that the concave pattern of body size variation across the latitudinal cline may be at least partly genetically determined, and that although there is considerable geographic variation in mean body size of R. temporaria, this variation does not conform with Bergmann's rule.},
  author       = {Laugen, A T and Laurila, A and Jönsson, Ingemar and Söderman, F and Merilä, J},
  issn         = {1522-0613},
  language     = {eng},
  number       = {5},
  pages        = {717--731},
  publisher    = {Evolutionary Ecology Ltd},
  series       = {Evolutionary Ecology Research},
  title        = {Do common frogs (Rana temporaria) follow Bergmann's rule?},
  volume       = {7},
  year         = {2005},
}