期刊
JOURNAL OF THERMAL BIOLOGY
卷 38, 期 5, 页码 225-232出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jtherbio.2013.02.005
关键词
Homonota; Argentina; Gecko; Latitude; Patagonia; Thermal tolerance
资金
- American Society of Ichthyologists and Herpetologists
- CSUN
- National Science Foundation
- Sigma Xi
- Society for the Study of Amphibians and Reptiles
- Direct For Biological Sciences
- Division Of Environmental Biology [0844523] Funding Source: National Science Foundation
(1) We measured thermal tolerances (critical thermal minimum, CTmin and panting threshold, T-pant) for four populations of Homonota darwinii spanning most of the latitudinal range of the species. (2) CTmin differed across populations, but not latitudinally as predicted, likely because latitude was not as good, a proxy for operative temperatures (T-e). (3) Some populations had subzero CTmin indicating supercooling or freeze tolerance-the first time either phenomenon has been reported for a gecko. (4) T-pant did not differ significantly among populations. (5) The thermal tolerance breadth appears to be correlated with thermal variability in the environment. (6) Annual T-e data indicate gecko retreats play a crucial role in surviving extreme surface temperatures ( < 0 or > 50 degrees C). (C) 2013 Elsevier Ltd. All rights reserved.
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