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First published online March 22, 2004
Journal of Experimental Biology 207, 1471-1478 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.00912

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The cardiovascular responses of the freshwater turtle Trachemys scripta to warming and cooling

Gina Galli^1,2,*, E. W. Taylor^1,2 and Tobias Wang¹

¹ Department of Zoophysiology, Aarhus University, 8000 Aarhus C, Denmark
² Department of Biosciences, The University of Birmingham, Edgbaston B15 2TT, England

View larger version (24K): [in a new window]   Fig. 1. Warming and cooling curves for untreated and atropinised turtles. (A) Heating and cooling curves. (B) The time taken per degree temperature change during warming and cooling. Values are means ± S.E.M. (N=7). **Significant difference between warming and cooling; significant difference between atropinised and untreated animals.

View larger version (19K): [in a new window]   Fig. 2. Heart rate (fH) (A) and total stroke volume (VStot) (B) during warming and cooling in untreated and atropinised animals. Values are means ± S.E.M. (N=6 and 7 in A and B, respectively). **Significant difference between warming and cooling; significant difference between atropinised and untreated animals.

View larger version (22K): [in a new window]   Fig. 3. Pulmonary (pul) (A) and systemic (sys) (B) blood flow during warming and cooling in untreated and atropinised animals. Values are means ± S.E.M. (N=7). **Significant difference between warming and cooling; significant difference between atropinised and untreated animals.

View larger version (17K): [in a new window]   Fig. 4. Systemic pressure (Psys) (A) and systemic resistance (Rsys) (B) during warming and cooling in untreated and atropinised animals. Values are means ± S.E.M. (N=6). **Significant difference between warming and cooling; significant difference between atropinised and untreated animals.

View larger version (23K): [in a new window]   Fig. 5. Pulmonary blood flow divided by systemic blood flow (pul/sys) during warming and cooling in untreated and atropinised animals. Values are means ± S.E.M. (N=6). **Significant difference between warming and cooling; significant difference between atropinised and untreated animals.