Hypoxia: Effects on Heart Rate and Respiration in the Snapping Turtle

See allHide authors and affiliations

Science  17 May 1963:
Vol. 140, Issue 3568, pp. 813-814
DOI: 10.1126/science.140.3568.813


In response to atmospheres containing decreasing amounts of oxygen, snapping turtles (Chelydra serpentina) maintained a fairly constant oxygen uptake. Their heart rate increased and the period of apnea between breathing cycles decreased. Small animals had a slightly greater mean uptake per gram than those five to ten times as large.