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Linear regression of the relationship between evaporative cooling efficiency and Ta. Evaporative cooling efficiency data (the ratio of evaporative heat loss to metabolic heat production, EHL/MHP) are for 10 murres. (A) A significant inflection point in EHL/MHP was identified at Ta=31.0°C (n=85). (B) EHL/MHP versus Mb at Ta≥31.0°C. The shaded area represents the 95% CI around the predicted values.
