Fig. 3. Relationships between the rates of lipid oxidation (filled circles) or carbohydrate oxidation (CHO; open circles) and metabolic rate (_O2) in adult ruff sandpipers exposed to cold (5°C). Lines were fitted by linear regression. Slope (m), intercept (b), coefficient of determination (r²), probability that the slope is equal to 0 (P), and power of the analysis of variance are also indicated.