Thermal sensitivity of locomotor performance and thermal profiles in two agamid lizards in Taiwan: Intraspecific, interspecific, intersexual comparisons across altitudes
Date Issued
2014
Date
2014
Author(s)
Chen, Che-Hao
Abstract
Physiological performance varies with body temperature in ectotherms, especially the locomotor performance which may influence their survivorship. Whether lizard populations in various thermal environments maintain similar thermal profiles and thermal performance curves has been debated. In this study, I compared the thermal characteristics between two populations from lowland and mid-altitude in Japalura swinhonis and Japalura polygonata xanthostoma. I measured lizard sprint speed and jump distance at 6 temperatures to calculate performance breadth (B80) and thermal optimum (To). I also measured thermal tolerance limits (CTmax, CTmin), selected temperature (Tsel) and field body temperature (Tb). Results showed that in both species populations from different altitudes had different patterns of thermal sensitivity and thermal tolerance. Sexual difference in thermal physiology was only found in J.polygonata xanthostoma. However, there was no significant difference in Tsel between two altitudinal populations or sexes in both species. My results support the labile view on the evolution of thermal physiology for lizards.
Subjects
溫度敏感度
運動表現
溫度耐受極限
蜥蜴
海拔
雌雄差異
Type
thesis
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