Document Detail

The physiology of overwintering in a turtle that occupies multiple habitats, the common snapping turtle (Chelydra serpentina).
MedLine Citation:
PMID:  12529844     Owner:  NLM     Status:  MEDLINE    
Common snapping turtles, Chelydra serpentina (Linnaeus), were submerged in anoxic and normoxic water at 3 degrees C. Periodic blood samples were taken, and PO(2), PCO(2), pH, [Na(+)], [K(+)], [Cl(-)], total Ca, total Mg, [lactate], [glucose], hematocrit, and osmolality were measured; weight gain was determined; and plasma [HCO(3)(-)] was calculated. Submergence in normoxic water caused a decrease in PCO(2) from 10.8 to 6.9 mmHg after 125 d, partially compensating a slight increase in lactate and allowing the turtles to maintain a constant pH. Submergence in anoxic water caused a rapid increase in lactate from 1.8 to 168.1 mmol/L after 100 d. Associated with the increased lactate were decreases in pH from 8.057 to 7.132 and in [HCO(3)(-)] from 51.5 to 4.9 mmol/L and increases in total Ca from 2.0 to 36.6 mmol/L, in total Mg from 1.8 to 12.1 mmol/L, and in [K(+)] from 3.08 to 8.45 mmol/L. We suggest that C. serpentina is tolerant of anoxic submergence and therefore is able to exploit habitats unavailable to some other species in northern latitudes.
Scott A Reese; Donald C Jackson; Gordon R Ultsch
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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:  Physiological and biochemical zoology : PBZ     Volume:  75     ISSN:  1522-2152     ISO Abbreviation:  Physiol. Biochem. Zool.     Publication Date:    2002 Sep-Oct
Date Detail:
Created Date:  2003-01-16     Completed Date:  2003-06-11     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  100883369     Medline TA:  Physiol Biochem Zool     Country:  United States    
Other Details:
Languages:  eng     Pagination:  432-8     Citation Subset:  IM    
Department of Biological Sciences, University of Alabama, Tuscaloosa, AL, 35487, USA.
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MeSH Terms
Acid-Base Equilibrium
Anoxia / blood
Cold Temperature
Hydrogen-Ion Concentration
Lactic Acid / blood
Oxygen / analysis
Species Specificity
Time Factors
Turtles / blood,  physiology*
Water / chemistry
Reg. No./Substance:
50-21-5/Lactic Acid; 7732-18-5/Water; 7782-44-7/Oxygen

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

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