【摘要】 在内蒙古锡林郭勒地区,通过标志重捕、染色标记和直接观测法对布氏田鼠社群等级的季节变化进行了研究。结果表明:在繁殖季节,布氏田鼠洞群内存在明显的社群等级。越冬雄鼠在社群内社群序位最高,其次是越冬雌鼠、当年成体雌鼠、当年成体雄鼠,亚成体鼠和幼鼠的社群地位最低。在繁殖末期,越冬雄鼠的地位明显下降,而当年成体雄鼠的等级序位逐渐上升。在繁殖季节,当年雄鼠在洞群中的等级序位依然很低,很少能有机会进行有效的交配,有效交配主要由越冬雄鼠来完成,因而越冬雄鼠对种群繁殖的贡献较大。本实验倾向于支持该鼠的婚配制度为一雄多雌制的观点。更多还原

【Abstract】 With marking-recapture, hair dyeing, and field observation, this paper studied the social hierarchy and its seasonal changes of Lasiopodomys brandtii in Xilinguole district of Inner Mongolia. The results revealed that in reproductive season, an obvious social hierarchy existed in the family groups of L. bramdtii. The social status from high to low was over-wintering males, over-wintering females, adult newborn females, adult newborn males, and sub-adults and juveniles. Since the newborn males had a lower social status, there was little chance for an adult newborn male to mate within an over-wintering male’s territory. Over-wintering males played a critical role in the population reproduction. By the end of reproductive season, the social status of over-wintering males began to fall down, while that of the newborn males promoted gradually. The present study supported the hypothesis about the polygynous mating system of L. bramdtii.更多还原