Is body size of the water frog Rana esculenta complex responding to climate change?

Tryjanowski, Piotr; Sparks, Tim; Rybacki, Mariusz; Berger, Leszek. 2006 Is body size of the water frog Rana esculenta complex responding to climate change? Naturwissenschaften, 93. 110-113.

Full text not available from this repository.


Recent studies on climate responses in ectothermic (cold-blooded) vertebrates have been few in number and focussed on phenology rather than morphology. According to Bergmann’s rule, endothermic (warm-blooded) vertebrates from cooler climates tend to be larger than congeners from warmer regions. Although amphibians are ectothermic vertebrates, weather and climatic conditions may also impact on their morphology, and thereby affect their survival rates and population dynamics. In this paper, we show, in a unique long-term study during the period 1963–2003 in an agricultural landscape in western Poland, that the body length of two water frog parental species (males of both Rana ridibunda and R. lessonae) increased significantly. However, their hybridogenetic hybrid R. esculenta did not show similar changes. A significant relationship with a large-scale climatic factor, the winter North Atlantic Oscillation index, was found positive for R. ridibunda males and R. lessonae females, and negative for R. esculenta females. Our findings, the first for amphibians, are consistent with other studies reporting that recent climate change has affected the morphology of animals. However, we also show that changes in amphibian phenotype linked to climate may vary independently between (even very similar) species.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: CEH Programmes pre-2009 publications > Other
UKCEH and CEH Sections/Science Areas: _ Ecological Processes & Modelling
ISSN: 0028-1042
Format Availability: Electronic, Print
Additional Information. Not used in RCUK Gateway to Research.: The original publication is available at
NORA Subject Terms: Meteorology and Climatology
Biology and Microbiology
Ecology and Environment
Date made live: 27 Jun 2007 08:47 +0 (UTC)

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...