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Figure 3


Fig. 3. Venous PO2 and depth profiles from a 23.1 min dive. This shallow (<60 m maximum depth) dive is currently the longest reported dive of an emperor penguin. The blood O2 store was optimized in this bird (EP 19) with a pre-dive venous PO2 of 63 mmHg, which was equivalent to arterial values of birds at rest. PO2 gradually declined throughout the dive to a final value of 6 mmHg and then returned to pre-dive levels within 3 min. Grey background indicates dive time.





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