Abstract: We tested the hypothesis that agonistic behavior between male Brandt's voles (Lasiopodomys brandtii) should increase and amicable behavior should decrease when male voles are competing for female voles. Three different groupings of voles were observed in the laboratory. Grouping 1- two males;grouping 2- two males with one non-estrous female; Grouping 3- two males with one estrous female. The results were (1)For both dominant and subordinate males the frequency of sniffing behavior was highest in grouping 1,then in grouping 2 and lowest in grouping 3. (2)The dominant male attacked the subordinate male most frequently in grouping 1,then in grouping 2 and least frequently in grouping 3. (3) The frequency of jumping behavior and self-grooming behavior of males was the same in all groups. (4)Amicable behavior was highest in grouping 2,then in grouping 3 and lowest in grouping 1. Hence,contrary to the hypothesis agonistic behavior decreased and amicable behavior increased when male voles were competing for female voles.

Key words: Brandt's vole (Lasiopodomys bandtii), Dominant, Group condition, Subordinate, Social behavior

摘要： 实验室内观察了布氏田鼠雄性个体之间在3 种不同社群条件下(社群1:2 只雄鼠;社群2:2 只雄鼠与1只非动情雌鼠,社群3:2 只雄鼠与1 只动情雌鼠)的相互行为,结果显示:(1)在嗅闻行为上,不论优势雄鼠还是从属雄鼠在3 组间都存在显著差异,它们的嗅闻频次都是在社群3 中最少、在社群2中居中,在社群1中嗅闻频次最多;(2)在攻击行为频次上,不论是优势雄鼠还是从属雄鼠在3 组中都不存在显著差异;(3)在上跳频次上,优势雄鼠在各组间存在显著差异,从属雄鼠在各组间不存在显著差异; (4) 在自我修饰行为频次上,不论是优势雄鼠还是从属雄鼠,在3 组之间不存在显著差异;(5)在相互友好行为上,3 组间存在显著差异。其中社群2 中的雄性之间的友好行为频次最高,社群3 中次之,社群1 中最低。结果表明,雄性之间的攻击行为并不因为雌性的存在而增强,反而会可能减少,我们推测这可能因为雄性要花费更多的时间用于社群探究和交配,从而减少了雄性之间的斗争。

关键词: 布氏田鼠, 社群行为, 优势, 从属, 社群条件