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Fig. 5. (A) Heart rate of foraging Greenland great cormorants throughout the year
cycle. Filled circles, heart rate (HR) of birds at the water surface
in-between dives; empty circles, heart rate of birds in the deepest section of
dives. The latter are also the lowest heart rates during the dives. One data
point is shown every eighth day; values are means + S.D.
(N=3-7). (B) Heart rate of resting Greenland great cormorants
throughout the year cycle. Filled circles, heart rates of animals resting
during the non-active phase (2:00-5:00 h); empty circles, heart rates of
animals resting during the active phase (10:00-15:00 h). One data point is
shown every eighth day; values are means + S.D.
(N=3-7).