Document Detail

The physiological response of diploid and triploid brook trout to exhaustive exercise.
MedLine Citation:
PMID:  12507620     Owner:  NLM     Status:  MEDLINE    
Using triploidy as an experimental model, we examined whether cell size limits the post-exercise recovery process in fish. Because triploids generally possess larger cells, which could affect many physiological and biochemical processes, we hypothesized that triploids would take longer to recover from exhaustive exercise compared to diploids. To test this, we measured plasma lactate, glucose and osmolality, and white muscle energy stores (glycogen, phosphocreatine and ATP) and lactate before and immediately following exhaustive exercise and during recovery at 2 and 4 h post-exercise. In addition, oxygen consumption and ammonia excretion rates were determined before and after exhaustive exercise. Overall, diploid and triploid brook trout showed similar metabolic responses exercise, but plasma osmolality, white muscle lactate, white muscle ATP and post-exercise oxygen consumption rates recovered earlier in triploids compared to diploids. The results of this study suggest that the characteristic larger cell size of triploidy does not limit the physiological response to, or recovery from, exhaustive exercise.
C A Hyndman; J D Kieffer; T J Benfey
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Comparative biochemistry and physiology. Part A, Molecular & integrative physiology     Volume:  134     ISSN:  1095-6433     ISO Abbreviation:  Comp. Biochem. Physiol., Part A Mol. Integr. Physiol.     Publication Date:  2003 Jan 
Date Detail:
Created Date:  2002-12-31     Completed Date:  2003-07-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9806096     Medline TA:  Comp Biochem Physiol A Mol Integr Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  167-79     Citation Subset:  IM    
Department of Biology and Centre for Coastal Studies and Aquaculture, University of New Brunswick, PO Box 5050, Saint John, N B E2L 4L5, Canada.
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MeSH Terms
Adenosine Triphosphate / metabolism
Ammonia / metabolism
Blood Glucose / metabolism
Cell Size / physiology
Energy Metabolism / physiology
Erythrocytes / cytology,  metabolism
Glycolysis / physiology
Lactic Acid / blood
Muscle, Skeletal / metabolism
Osmolar Concentration
Oxygen Consumption / physiology
Physical Endurance / physiology*
Trout / genetics,  metabolism*
Water / metabolism
Reg. No./Substance:
0/Blood Glucose; 50-21-5/Lactic Acid; 56-65-5/Adenosine Triphosphate; 7664-41-7/Ammonia; 7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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