spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

First published online November 14, 2008
Journal of Experimental Biology 211, 3671-3676 (2008)
Published by The Company of Biologists 2008
doi: 10.1242/jeb.019869
This Article
Right arrow Summary Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Zani, P. A.
Right arrow Articles by Kram, R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Zani, P. A.
Right arrow Articles by Kram, R.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

Low metabolic cost of locomotion in ornate box turtles, Terrapene ornata

Peter A. Zani* and Rodger Kram

Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA


Figure 1
View larger version (6K):
[in this window]
[in a new window]

  		Fig. 1. Drawing of the open-flow acetate mask worn by turtles. Arrows indicate the direction of air flow. The mask was attached by Velcro to the shell, but otherwise did not touch the animal during locomotion.

 

Figure 2
View larger version (21K):
[in this window]
[in a new window]

  		Fig. 2. Data from 141 trials of 18 individual Terrapene ornata walking on the level showing (A) rate of oxygen consumption versus speed for all trials, (B) cost of transport (COT) versus speed for all trials, and (C) minimum COT (COTmin) for up to 10 trials for each individual versus speed. Dashed line indicates the expected COT based on mass (Full, 1989Go). Average resting VO2 (±1 s.d.) is shown as a filled circle at 0 m s–1.

 

Figure 3
View larger version (19K):
[in this window]
[in a new window]

  		Fig. 3. Data from 108 trials of 18 individual Terrapene ornata walking on a 24.1 deg. incline showing (A) rate of oxygen consumption versus speed for all trials, (B) COT versus speed for all trials, and (C) COTmin for up to 10 trials for each individual versus speed. Dashed line is expected COT based on mass (Full, 1989Go). Note, horizontal axis is the same scale as in Fig. 2. Average resting VO2 (±1 s.d.) is shown as a filled circle at 0 m s–1.

 

Figure 4
View larger version (6K):
[in this window]
[in a new window]

  		Fig. 4. Log–log plot of body mass versus COTmin from 25 reptiles. Open circles are 23 species of lizard (reviewed by Hare et al., 2007Go). Gray circle is Murray short-necked turtle (Baudinette et al., 2000Go). Black circle is ornate box turtle (this study). Solid trend line is least-squares regression. Dashed lines are 95% confidence intervals.

 

Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?



© The Company of Biologists Ltd 2008