Fig. 1

Comparison of body mass (a), basal metabolic rate (b), and the relationship between body mass and basal metabolic rate (c), between Chinese Bulbuls (Pycnonotus sinensis) that were provided with food ad libitum (control group) and those that were provided with half the usual quantity of food (food restriction group), after 12 days. Data are shown as mean ± SEM, *p < 0.05, ***p < 0.001. FR food restriction group