Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or 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.

Further Observations on Thermoregulation in the Brooding Female Python molurus bivittatus (Serpentes: Boidae)

L. H. S. Van Mierop and Susan M. Barnard
Copeia
Vol. 1978, No. 4 (Dec. 28, 1978), pp. 615-621
DOI: 10.2307/1443687
Stable URL: http://www.jstor.org/stable/1443687
Page Count: 7
  • 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.
Further Observations on Thermoregulation in the Brooding Female Python molurus bivittatus (Serpentes: Boidae)
Preview not available

Abstract

Resting oxygen consumption of a gravid Python m. bivittatus increased appreciably, and weak spasmodic contractions of the body began before eggs were laid. Contractions increased in frequency and strength at oviposition and were accompanied by a rapid rise of oxygen consumption and body temperature. The incubating female responded to a decrease in ambient temperature ( T A) with an increase in oxygen consumption and contraction rate and was able to maintain a stable body temperature ( T B) above 33 C until T A fell below 26 C. At a T A of 23 C the temperature differential T B- T A was 8.3 C and oxygen consumption had increased to a mean of 169 ml O2 kg-1 hr-1, 20 times that of the non-gravid animal at the same T A. An increase of T A caused a decrease of contraction rate and oxygen consumption. Mean daily oxygen consumption of the eggs during the last 9 days of incubation ranged from 110 to 130 ml O2 kg-1 hr-1. Mean standard metabolic rate of day-old hatchlings was 124 ml O2 kg-1 hr-1 at a T A of 28 C. Air samples from among the eggs inside the body coil during incubation had a CO2 concentration of 1%. Standard metabolic rate of the non-gravid animal increased with temperature, but not in a simple, exponential fashion.

Page Thumbnails

  • Thumbnail: Page 
[615]
    [615]
  • Thumbnail: Page 
616
    616
  • Thumbnail: Page 
617
    617
  • Thumbnail: Page 
618
    618
  • Thumbnail: Page 
619
    619
  • Thumbnail: Page 
620
    620
  • Thumbnail: Page 
621
    621