RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

The physiology of hibernation among painted turtles : the midland painted turtle (Chrysemys picta marginata)

Auteur(s) / Author(s)

REESE Scott A. (1) ; CROCKER Carlos E. (1) ; JACKSON Donald C. (2) ; ULTSCH Gordon R. (1 2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Biological Sciences, University of Alabama, Tuscaloosa, AL 35487-0344, ETATS-UNIS
(2) Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI 02912, ETATS-UNIS

Résumé / Abstract

Midland painted turtles from Michigan were submerged at 3°C in normoxic and anoxic water. In predive, and in turtles submerged for up to 150 days, plasma PO2, PCO2, pH, [Cl-], [Na+], [K+], total Mg, total Ca, lactate, glucose, and osmolality were measured; hematocrit and mass were determined, and plasma [HCO3-] was calculated. Anoxic turtles developed a severe metabolic acidosis, accumulating lactate from a predive value of 4.4 mmol/L to a 150-day value of 185 mmol/L, associated with a fall in pH from 7.983 to 7.189. To buffer lactate increase, total calcium and magnesium rose from 3.7 and 2.6 to 58.9 and 11.8 mmol/L, respectively. Plasma [HCO3-] was titrated from 39.2 to 4.8 mmol/L in anoxic turtles. Turtles in normoxic water had only minor disturbances of their acid-base and ionic statuses, associated with a much smaller increase of lactate to 23 mmol/L; there was a marked increase in hematocrit from 29.1% to 42.1%. We suggest that it is ecologic, rather than phylogenetic, relationships that determine the responses of painted turtles to prolonged submergence associated with hibernation.

Revue / Journal Title

Respiration physiology    ISSN  0034-5687   CODEN RSPYAK 

Source / Source

2000, vol. 124, no1, pp. 43-50 (23 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Amsterdam, PAYS-BAS  (1966-2001) (Revue)

Mots-clés anglais / English Keywords

Hibernation

;

Hypoxia

;

Anoxia

;

Diving

;

Glucose

;

PaO2

;

PaCO2

;

Acidosis

;

Blood cell

;

Blood plasma

;

Animal

;

Michigan

;

Chrysemys picta

;

Oxygen

;

Environmental factor

;

Carbohydrate

;

Acid base balance disorder

;

Metabolic disorder

;

United States

;

North America

;

America

;

Chelonia

;

Reptilia

;

Vertebrata

;

Freshwater environment

;

Mots-clés français / French Keywords

Hibernation

;

Hypoxie

;

Anoxie

;

Plongée

;

Glucose

;

PaO2

;

PaCO2

;

Acidose

;

Cellule sanguine

;

Plasma sanguin

;

Animal

;

Michigan

;

Chrysemys picta

;

Oxygène

;

Facteur milieu

;

Glucide

;

Trouble équilibre acidobasique

;

Trouble métabolisme

;

Etats Unis

;

Amérique du Nord

;

Amérique

;

Chelonia

;

Reptilia

;

Vertebrata

;

Milieu eau douce

;

Testudinidae

;

Mots-clés espagnols / Spanish Keywords

Hibernación

;

Hipoxia

;

Anoxia

;

Inmersión

;

Glucosa

;

PaO2

;

PaCO2

;

Acidosis

;

Célula sanguínea

;

Plasma sanguíneo

;

Animal

;

Michigán

;

Chrysemys picta

;

Oxígeno

;

Factor medio

;

Glúcido

;

Trastorno equilibrio acidobásico

;

Trastorno metabolismo

;

Estados Unidos

;

America del norte

;

America

;

Chelonia

;

Reptilia

;

Vertebrata

;

Medio agua dulce

;

Localisation / Location

INIST-CNRS, Cote INIST : 12641, 35400009325680.0050

Nº notice refdoc (ud4) : 810643



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas