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Body size of the weasel Mustela nivalis and the stoat M. erminea in Sweden.
Department of Zoology,Tel Aviv University.
Department of Zoology,Tel Aviv University.
Stockholm University, Faculty of Science, Department of Zoology, Animal Ecology.ORCID iD: 0000-0001-5535-9086
2010 (English)In: Mammalian Biology, ISSN 1616-5047, E-ISSN 1618-1476, Vol. 75, 420-426 p.Article in journal (Refereed) Published
Abstract [en]

In this study we examined temporal and geographical variations in a sample of 124 skulls of the weasel Mustela nivalis and 146 skulls oft hestoat M. erminea, collected in Sweden between 1959-1992 and 1913-1990, respectively. We used Principal Component Analysis (PCA) to combine the effects of latitude, longitude, year of collection, mean ambient temperature and Net Primary Productivity (NPP). The first principal component (PC1) contained latitude, ambient temperature and NPP and was significantly and positively related to male (but not female) skull size of both stoats and weasels. None of the other factors or their interactions were significantly related to skull size. We conclude that ambient temperature, either directly through energy savings, or indirectly through improved food availability (increasedNPP), had a significant effect on determining body size of male stoats and weasels in Sweden. Our results support the hypothesis that male and female of these species are affected by different selection pressures and thus react differently to changing environmental conditions.

 

Place, publisher, year, edition, pages
2010. Vol. 75, 420-426 p.
Keyword [en]
Ambient temperature;Bodysize; Mustela nivalis; Mustela erminea; NetPrimaryProductivity(NPP)
National Category
Ecology
Research subject
Animal Ecology
Identifiers
URN: urn:nbn:se:su:diva-47087DOI: 10.1016/j.mambio.2009.06.003OAI: oai:DiVA.org:su-47087DiVA: diva2:372985
Available from: 2010-11-29 Created: 2010-11-29 Last updated: 2017-12-12Bibliographically approved

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