关键词: 白头叶猴, 取代行为, 臣服行为, 亲密系数, 配偶保卫假说

Abstract: G-group is a multi-male group located in Luobai, south of China. Ethogram of social behaviors including sexual behavior, affinitive behavior and aggressive behavior, is presented with descriptions of social context and social function. Episodes of supplanting and submissive interactions were recorded to determine dominance relations among G-group members. Three males, including two adult male and one sub adult male, are the most dominant ones in G-group with a linear dominance among themselves. However, dominance relations among females and other males are more complex and poorly differentiated. The cluster analysis of index of Familiarity between G-group members shows that: index of familiarity between females are the highest, two dominant adult males form coalition, and relations among non-adult males are closer than with other members. Females in G-group are roomers in about 70.7% of the total bouts and groom others more than expected by chance. Instead, non-adult males are in general groomed. The bouts they groom others are about 2.8% of total bouts, but they receive grooming in about 33.1% of the total bouts. The biased grooming between adult males and females consist with the hierarchy. There is apparent difference between social behaviors of two sexes. Intergroup antagonism is entirely male's affair, and they protect the safety of group and territories actively. These behavior primarily serve the function of defend females just as the Mate defense hypothesis.

Key words: White-headed Langur, supplanting behavior, submissive behavior, familiarity index, mate defense hypothesis