Physiology of common map turtles (Graptemys geographica) hibernating in the Lamoille River, Vermont

Autor: Gordon R. Ultsch, Donald C. Jackson, T.E. Graham, Carlos E. Crocker
Rok vydání: 2000
Předmět:
Zdroj: The Journal of Experimental Zoology. 286:143-148
ISSN: 1097-010X
0022-104X
DOI: 10.1002/(sici)1097-010x(20000201)286:2<143::aid-jez6>3.0.co;2-1
Popis: Common map turtles (Graptemys geographica) were collected from a natural underwater hibernaculum in Vermont at monthly intervals during the winter of 1997-1998. Blood was sampled by cardiac puncture and analyzed for pH, PCO(2), PO(2), and hematocrit; separated plasma was tested for Na(+), K(+), Cl(-), total [Ca], total [Mg], [lactate], and osmolality (mOsm kg(-1) H(2)O). Control (eupneic; 1 degrees C) values for pH, PO(2), PCO(2), [HCO(3)(-)], and [lactate] were 7.98 +/- 0.03, 47.4 +/- 18.7, 10.1 +/- 0.7 (mm Hg), 36.1 +/- 0.2 (mmol liter(-1)), and 2.1 +/- 0.1 (mmol liter(-1)), respectively. Between November 1997 and March 1998, ice covered the river and the turtles rested on the substratum, fully exposed to the water, and were apneic. Blood PO(2) was maintained at less than 3 mm Hg (range 0.9 +/- 0.2 to 2.1 +/- 0.7 mm Hg), PCO(2) decreased slightly, plasma [lactate] was
Databáze: OpenAIRE
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