Cutaneous Water Loss and the Effects of Temperature and Hydration State on Aerobic Metabolism of Canyon Treefrogs, Hyla arenicolor

We measured the combined effects of variation in body temperature and hydration state on resting and active metabolism of the canyon treefrog, Hyla arenicolor. Skin resistance, body temperature, and rates of evaporation were measured at two temperatures. There was significant individual variation an...

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Bibliographic Details
Published in:Herpetologica 1992-06, Vol.48 (2), p.210-219
Main Authors: Preest, Marion R., Brust, Douglas G., Wygoda, Mark L.
Format: Article
Language:English
Subjects:
Amphibians
Animals
Biological and medical sciences
Body temperature
Dehydration
Frogs
Fundamental and applied biological sciences. Psychology
Herpetology
Intermediate and energetic metabolism
Metabolism
Metabolisms and neurohumoral controls
Oxygen consumption
Tissue hydration
Vertebrates: anatomy and physiology, studies on body, several organs or systems
Water loss
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Summary:We measured the combined effects of variation in body temperature and hydration state on resting and active metabolism of the canyon treefrog, Hyla arenicolor. Skin resistance, body temperature, and rates of evaporation were measured at two temperatures. There was significant individual variation and a significant effect of temperature on oxygen consumption of resting animals. Individual variation, temperature, hydration state, and a temperature/hydration state interaction affected oxygen consumption of active animals. Hyla arenicolor had lower rates of evaporative water loss and higher body temperatures than expected for typical anurans at both test temperatures. Skin resistance was lower at higher temperatures. Reduced evaporative water loss, the lack of an effect of dehydration on resting metabolism, and the sedentary nature of this species may contribute to its ability to inhabit an environment with often stressful thermal and hydric conditions.
ISSN:0018-0831
1938-5099