Journal of comparative physiology

, Volume 93, Issue 2, pp 117-125

First online:

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

  • Richard W. HillAffiliated withThe Museum and Department of Zoology, Michigan State University
  • , Douglas M. LayAffiliated withDepartment of Anatomy, The University of North Carolina
  • , James H. VeghteAffiliated withAerospace Medical Research Laboratory, Wright-Patterson Air Force Base

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access


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.