Access

You are not currently logged in.

Access JSTOR through your library or other institution:

login

Log in through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

The Effect of Desiccation upon the Preferred Body Temperature and Activity Level of the Lizard Sceloporus undulatus

Shawn R. Crowley
Copeia
Vol. 1987, No. 1 (Feb. 11, 1987), pp. 25-32
DOI: 10.2307/1446033
Stable URL: http://www.jstor.org/stable/1446033
Page Count: 8
  • Read Online (Free)
  • Download ($12.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Effect of Desiccation upon the Preferred Body Temperature and Activity Level of the Lizard Sceloporus undulatus
Preview not available

Abstract

The effect of acute desiccation upon the preferred body temperatures and activity levels of the lizard Sceloporus undulatus (Iguanidae) collected from two habitats differing in thermal regime and water availability was investigated. In thermal gradients, desiccated lizards selected significantly lower body temperatures than did hydrated lizards. There was a significant negative relationship between the body temperatures selected during activity and the degree of desiccation. Relative to hydrated lizards, desiccated lizards also showed a significant decrease in activity, tending to remain buried in the substrate of the thermal gradient. Lizards collected from two different habitats differed significantly in response to desiccation when active but not when inactive. Reductions in body temperature and activity presumably function to decrease water loss.

Page Thumbnails

  • Thumbnail: Page 
25
    25
  • Thumbnail: Page 
26
    26
  • Thumbnail: Page 
27
    27
  • Thumbnail: Page 
28
    28
  • Thumbnail: Page 
29
    29
  • Thumbnail: Page 
30
    30
  • Thumbnail: Page 
31
    31
  • Thumbnail: Page 
32
    32