This work was carried out at Haibei Research Station of Alpine Meadow Ecosystem, Menyuan County, Qinghai from April to October in 1982. The materials for study Were collected in three phenological periods of vegetation: green up, exuberance and withering. The results for polecat (Mustela eversmanni) are as follows:1. The daily food consumption (fresh wt) for polecat averages 0.404 g/g body wt. in the whole green up period, but 0.351 g/g body wt. in all three phenological periods. The daily food consumption ...