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. 2011 Jul 19;6(7):e21110. doi: 10.1371/journal.pone.0021110

Figure 1. Heart rate increase during an episode of comfort behavior in an incubating king penguin.

Figure 1

Shadowed zones delimit pre- and post-comfort resting periods and comfort behavior, respectively, whereas the white zone delimits the recovery period. Dotted lines give average HR during comfort behavior and recovery period, respectively, whereas the dashed lined gives average HR during pre- and post-comfort resting periods.