Document Detail

The specific dynamic action of the omnivorous tortoise Kinixys spekii in relation to diet, feeding pattern, and gut passage.
MedLine Citation:
PMID:  9472813     Owner:  NLM     Status:  MEDLINE    
The peak of the elevated oxygen consumption following feeding may be preabsorptive in some reptiles, possibly because of the up-regulation of gut function. The question of whether up-regulation has a substantial net cost and accounts for a large part of the cost of the specific dynamic action can be resolved by comparing the response to single and repeated meals. Oxygen consumption of the omnivorous tortoise Kinixys spekii was elevated for 3-4 d after a single meal, and the peak occurred while most food was still in the stomach. The cost of the specific dynamic action varied between diets, being 16%, 21%, and 30% of the energy absorbed from fungi, leaves, and millipedes, respectively, but was about 0.8 L O2 g-1 absorbed protein for all diets. The specific dynamic action doubled during continuous feeding on leaves and then accounted for 42% of the absorbed energy. The increase after repeated feeding shows that up-regulation of gut function can contribute little to the energy cost of the specific dynamic action in K. spekii; otherwise the cost would fall in subsequent meals.
A Hailey
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physiological zoology     Volume:  71     ISSN:  0031-935X     ISO Abbreviation:  Physiol. Zool.     Publication Date:    1998 Jan-Feb
Date Detail:
Created Date:  1998-03-10     Completed Date:  1998-03-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401142     Medline TA:  Physiol Zool     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  57-66     Citation Subset:  IM    
Department of Biological Sciences, University of Zimbabwe, Mount Pleasant, Harare.
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MeSH Terms
Diet / veterinary*
Digestion / physiology
Eating / physiology
Energy Metabolism / physiology
Gastrointestinal Motility / physiology*
Oxygen Consumption / physiology
Regression Analysis
Time Factors
Turtles / physiology*

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