Journal of comparative physiology

, Volume 93, Issue 2, pp 117–125 | Cite as

Body surface temperatures of jerboas (Allactaga) in uniform thermal environments

  • Richard W. Hill
  • Douglas M. Lay
  • James H. Veghte
Article

Summary

Body surface temperatures of threeAllactaga elater and oneA. hotsoni were measured by infrared radiography at ambient temperatures of 1° to 42°C. In each test the radiant temperature of environmental surfaces was the same as air temperature.

At ambient temperatures of 40–42°C, the temperature of the entire body surface was close to ambient temperature. As ambient temperature was lowered toward 1°C, forehead and back temperatures became increasingly greater than ambient temperature (Fig. 3), indicating an increasing thermal flux across these parts of the body. Forehead and back temperatures were linear functions of ambient temperature below thermoneutrality and behaved as expected according to a model of thermal exchange developed here. The surface temperature of the extraordinarily large pinnae remained close to ambient temperature down to 10°C (Fig. 3), indicating that deep pinna temperature likely falls with decreasing ambient temperature and that the pinnae, despite their size, are not major sites of heat loss at low ambient temperatures.

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Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • Richard W. Hill
    • 1
  • Douglas M. Lay
    • 2
  • James H. Veghte
    • 3
  1. 1.The Museum and Department of ZoologyMichigan State UniversityEast LansingUSA
  2. 2.Department of AnatomyThe University of North CarolinaChapel HillUSA
  3. 3.Aerospace Medical Research LaboratoryWright-Patterson Air Force BaseUSA

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