摘要
本文对呼伦贝尔草原黄羊日活动时间分配季节变化及其影响因素进行了研究，发现采食是黄羊的主要活动，四季中所占时间百分比均超过５０％。夏季黄羊每天有两个采食高峰，日活动中采食所占时间百分比为５４．７８％，春，秋两季也有两个采食高峰，但持续时间较夏季长。冬季采食所用时间明显增加，达到８０．７９％。
The variation in time budgets of daily activities in Mongolian Gazelles was studied in different seasons.lt was found that foraging is a major behavior covering 50% of all activities in all seasons.During summer.there were two feeding peaks which occupied 54.78% of daily activities.In the spring and autumn.there were also two peaks which were,however.not as long as in summer.In winter.gazelles grazed almost the entire day.occupying 80.79% of their time.These changing patterns seemed mainly related to the abundance,distribution,and availability of forage.Food selection also Varied Seasondlly,whereas gazelle group size related positively with feeding frequency and negatively with vigilance behavior.
