Cardiovascular correlates of exercise in snapping turtles, Chelydra serpentina.
1. Heart rate increased with a rise in body temperature (10-30 degrees C) and with induced physical exercise in snapping turtles. 2. Maximum heart rate increment occurred at 30 degrees C. 3. Standard oxygen pulse did not change with a rise in temperature. 4. Oxygen pulse during exercise and oxygen pulse increment were maximal at 10 degrees C and minimal at 20 degrees C. 5. The increase in heart rate with exercise accounted for only 9-22% of the increase in oxygen transport during activity; the remainder was provided by a rise in cardiac stroke volume and/or A-V difference.
D000818:Animals; D001831:Body Temperature; D006339:Heart Rate; D007700:Kinetics; D010101:Oxygen Consumption; D005082:Physical Exertion; D014426:Turtles / Q000502:physiology*