| Scaling the duration of activity relative to body mass results in similar locomotor performance and metabolic costs in lizards. | |
| | |
MedLine Citation:
|
PMID: 18840659 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
This study examines the physiological response to locomotion in lizards following bouts of activity scaled to body mass. We evaluate this method as a way to compare locomotor energetics among animals of varying body mass. Because most of the costs of brief activity in reptiles are repaid during recovery we focus on the magnitude and duration of the excess post-exercise oxygen consumption (EPOC). Lizards ranging from 3 g to 2400 g were run on a treadmill for durations determined by scaling the run time of each animal to the 1/4 power of body mass and allowing each animal to run at its maximum speed for that duration. This protocol resulted in each species traveling the same number of body lengths and incurring similar factorial increases in V(O(2)). Following activity, EPOC volume (ml O(2)) and the cost of activity per body length traveled (ml O(2) per body length) scaled linearly with body mass. This study shows that the mass-specific costs of activity over an equivalent number of body lengths are similar across a broad range of body mass and does not show the typical patterns of allometric scaling seen when cost of locomotion are expressed on a per meter basis. Under field conditions larger animals are likely to travel greater absolute distances in a given bout of activity than smaller animals but may travel a similar number of body lengths. This study suggests that if locomotor costs are measured on a relative scale (ml O(2) per body length traveled), which reflects these differences in daily movement distances, that locomotor efficiency is similar across a wide range of body mass. |
| | |
Authors:
|
E R Donovan; T T Gleeson |
Related Documents
:
|
11319629 - Impact of high-intensity exercise on energy expenditure, lipid oxidation and body fatness. 9615869 - Effect of a sports food bar on fat utilisation and exercise duration. 20171529 - Exercise, body composition, and functional ability: a randomized controlled trial. 21908009 - Exercise capacity and cardiac reserve in children and adolescents with corrected pulmon... 15129929 - Dietary composition influences short-term endurance training-induced adaptations of sub... 16339329 - Effects of progressive resistance training on body composition in frail older adults: r... 3929659 - Effect of eucapnic hypoxia on bronchomotor tone and on the bronchomotor response to dry... 17121639 - Effects of a physical exercise intervention on subjective physical well-being, psychoso... 15042519 - Muscle pain during exercise in normotensive africanamerican women: effect of parental h... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
|
Title: The Journal of experimental biology Volume: 211 ISSN: 0022-0949 ISO Abbreviation: J. Exp. Biol. Publication Date: 2008 Oct |
Date Detail:
|
Created Date: 2008-10-08 Completed Date: 2008-12-11 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
|
Languages: eng Pagination: 3258-65 Citation Subset: IM |
Affiliation:
|
Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA. edonovan@unr.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Behavior, Animal / physiology Body Weight / physiology* Lactic Acid / metabolism Lizards / metabolism* Locomotion Motor Activity / physiology* Oxygen Consumption Running / physiology Time Factors |
| Chemical | |
Reg. No./Substance:
|
50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Thermal tolerance in bottlenose dolphins (Tursiops truncatus).
Next Document: Running biomechanics: shorter heels, better economy.