Fig. 2. Basal metabolic rate in laughing doves Streptopelia senegalensis was not related to body mass during initial, acclimation I or acclimation II measurements. A linear regression model yielded a significant fit in only one case [initial measurements, acclimation air temperature (T_acc)=10°C; BMR=0.0099M_b-0.1348; r²=0.515]. Note that, for each T_acc, data for initial (A) and acclimation I measurements (B) were obtained from the same individuals, but from different individuals during acclimation II measurements (C).