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First published online March 30, 2006
Journal of Experimental Biology 209, 1421-1429 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02151
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Heterothermy of free-living Arabian sand gazelles (Gazella subgutturosa marica) in a desert environment

Stéphane Ostrowski1,* and Joseph B. Williams2

1 National Wildlife Research Center, PO Box 1086, Taif, Saudi Arabia
2 Department of Evolution, Ecology and Organismal Biology, Ohio State University, 300 Aronoff Lab, 318 W 12th Avenue, Columbus, OH 43210, USA


Figure 1
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  		Fig. 1. Air temperature (open circles) and solar radiation (filled circles) versus time of day in Mahazat as-Sayd for (A) summer and (B) winter between January 2004 and July 2004. Values are means ± s.d.

 

Figure 2
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  		Fig. 2. Mean body temperature of six free-ranging Arabian sand gazelles in summer and winter at Mahazat as-Sayd, as a function of time of day. Values are means ± s.d. for 60 days and 56 days in winter and summer 2004, respectively.

 

Figure 3
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  		Fig. 3. Heat storage of five free-ranging Arabian sand gazelles versus (A) mean air temperature (Ta,mean) and (B) maximum air temperature (Ta,max) during the summer in Mahazat as-Sayd.

 

Figure 4
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  		Fig. 4. Gradient between body temperature and air temperature (Tb–Ta) as a function of time of day in six Arabian sand gazelles during winter (A) and summer (B) in Mahazat as-Sayd.

 

Figure 5
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  		Fig. 5. Mean body temperature of six captive Arabian sand gazelles in Mahazat as-Sayd, exposed to three different food and water regimens, as a function of time of day. Values are means ± s.d. for 3 days when food and water were provided ad libitum, for 3 days when water was denied, and for 3 days when both food and water were denied, in August 2004.

 




© The Company of Biologists Ltd 2006