The present paper deal with ecophysiological characteristics in hibernating ground squirrels (Citellus dauricus). Resting metabolic rate was measured using a closed-system respirometer (Wang et al., 1980); the electrocardiogram was recorded by type XDH- 3 electrocardiograph.1. The metabolic rate of ground squirrel was determined at different temperatures ranging from 0℃. to 35℃.Oxygen consumption was negatively correlated with ambient temperature in hibernating and activity states (Table 1 ;, Fig. 1 ). The ...