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Local climate and genetic influence on intraspecific variation in torpor physiology of a cave‐roosting bat

Abstract Many small endotherms employ torpor as a survival strategy to reduce energy expenditure during periods with low food availability and cold temperatures. The expression and physiology of torpor can vary substantially within species because of phenotypic plasticity and local adaptation. Understanding how plasticity and genetics influence intraspecific variation is fundamental to identifying the drivers of phenotypic variance in nature. Using a widely distributed bat species, the eastern bent‐wing bat ( Miniopterus orianae oceanensis ), we exposed individuals from two thermally distinct sites to cold temperature regimes (ranging from 15 to 5°C). We measured oxygen consumption, and carbon dioxide production (proxies for torpor metabolic rate, TMR), and water loss during torpor (TEWL) using open‐flow respirometry, and quantified skin surface temperature …

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