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Linear regression of the relationship between resting metabolic rate (RMR) and Ta. RMR data are for 10 murres. (A) A significant inflection point in RMR was identified at Ta=29.9°C (n=85). (B) Data for birds with Mb greater (n=27) or lower (n=15) than 900 g at Ta≥29.9°C. The shaded area represents the 95% CI around the predicted values.
