Geographic variation in winter adaptations of snowshoe hares (Lepus americanus)

L. C. Gigliotti, D. R. Diefenbach, Michael John Sheriff

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Understanding adaptations of nonhibernating northern endotherms to cope with extreme cold is important because climate-induced changes in winter temperatures and snow cover are predicted to impact these species the most. We compared winter pelage characteristics and heat production of snowshoe hares (Lepus americanus Erxleben, 1777) on the southern edge of their range, in Pennsylvania (USA), to a northern population, in the Yukon (Canada), to investigate how hares might respond to changing environmental conditions. We also investigated how hares in Pennsylvania altered movement rates and resting spot selection to cope with variable winter temperatures. Hares from Pennsylvania had shorter, less dense, and less white winter coats than their northern counterparts, suggesting lower coat insulation. Hares in the southern population had lower pelage temperatures, indicating that they produced less heat than those in the northern population. In addition, hares in Pennsylvania did not select for resting spots that offered thermal advantages, but selected locations offering visual obstruction from predators. Movement rates were associated with ambient temperature, with the smallest movements occurring at the lower and upper range of observed ambient temperatures. Our results indicate that snowshoe hares may be able to adapt to future climate conditions via changes in pelage characteristics, metabolism, and behavior.

Original languageEnglish (US)
Pages (from-to)539-545
Number of pages7
JournalCanadian journal of zoology
Volume95
Issue number8
DOIs
StatePublished - Jan 1 2017

Fingerprint

Lepus americanus
hares
geographical variation
pelage
winter
temperature
ambient temperature
climate
heat
Yukon Territory
heat production
insulating materials
snowpack
insulation
climate conditions
snow cover
metabolism
environmental conditions
Canada
predator

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

Gigliotti, L. C. ; Diefenbach, D. R. ; Sheriff, Michael John. / Geographic variation in winter adaptations of snowshoe hares (Lepus americanus). In: Canadian journal of zoology. 2017 ; Vol. 95, No. 8. pp. 539-545.
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Geographic variation in winter adaptations of snowshoe hares (Lepus americanus). / Gigliotti, L. C.; Diefenbach, D. R.; Sheriff, Michael John.

In: Canadian journal of zoology, Vol. 95, No. 8, 01.01.2017, p. 539-545.

Research output: Contribution to journalArticle

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