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Control of panting in the desert iguana: Roles for peripheral temperatures and the effect of dehydration

✍ Scribed by Dupré, R. Keith ;Crawford, Eugene C.

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
551 KB
Volume
235
Category
Article
ISSN
0022-104X

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✦ Synopsis

Although it is generally held that panting is a physiological mechanism for the regulation of brain temperature during heat stress, a number of studies have pointed to the importance of peripheral input for the initiation of the panting response in a variety of animals. By presenting ambient heat loads of 47", 54", 58", and 65"C, and measuring skin, ear and core temperatures of the desert iguana, Dipsosaurus dorsalis, at the onset of panting, we found that the skin temperature at panting onset was independent of ambient heat load. This suggests that skin (peripheral) temperature is the body temperature on which the central thermoregulatory center cues to initiate thermal panting. Peripheral temperature control of panting was retained when the plasma osmolality of the desert iguana was increased by 100 m O s d kg H20 to simulate dehydration. Dehydration to 80% initial body weight (IBW)

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