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. 2012 Sep 19;8(6):1047–1049. doi: 10.1098/rsbl.2012.0743

Figure 1.

Figure 1.

Arterial Inline graphic (black line, 5 s sampling interval) and depth profiles (blue line, 1 s sampling interval) from serial deep dives of a California sea lion. (a) Characteristic Inline graphic profiles of serial deep dives. (b) Typical abrupt changes in Inline graphic occur in this dive at approximately 200 m depth during descent and ascent (indicated with red arrows), consistent with significant cessation of gas exchange at depth. Profiles were characterized by a, an initial compression hyperoxia; b, an abrupt decline at approximately 200 m depth; c, a gradual decline in Inline graphic in the bottom segment of the dive; d, a rapid increase in Inline graphic during early ascent; e, a decline in Inline graphic during ascent.