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Figure 7


Fig. 7. Log transformation of dive heart rate (fH) vs mean dive stroke frequency (A) and mean dive stroke frequency vs dive duration (B), N=5 birds, 47 dives. As seen in the linear fits in A the log of dive fH does not have a significant relationship to stroke frequency (y=0.508x+1.27, r2=0.082, P=0.051), and in B, dive stroke frequency has a significant, but weak negative relationship to dive duration (y=–17.70x+0.72, r2=0.267, P=0.0002).