PDF(Pubmed)
Abstract：
Social living affords primates (including humans) many benefits. Communication has been proposed to be the key mechanism used to bond social connections, which could explain why primates have evolved such expressive faces. We assessed whether the facial expressivity of the dominant male (quantified from the coding of anatomically based facial movement) was related to social network properties (based on social proximity and grooming) in nine groups of captive rhesus macaques (Macaca mulatta) housed in uniform physical and social environments. More facially expressive dominant male macaques were more socially connected and had more cohesive social groups. These findings show that inter-individual differences in facial expressivity are related to differential social outcomes at both an individual and group level. More expressive individuals occupy more beneficial social positions, which could help explain the selection for complex facial communication in primates.
摘要：
社会生活为灵长类动物（包括人类）提供了许多好处。沟通被认为是连接社会关系的关键机制，这可以解释为什么灵长类动物进化出如此富有表现力的面孔。我们评估了9组圈养恒河猴（猕猴）中占主导地位的男性的面部表现力（从基于解剖学的面部运动编码中量化）是否与社交网络属性（基于社交接近度和修饰）有关在统一的物理和社会环境中。更具面部表现力的雄性猕猴与社会的联系更紧密，社会群体的凝聚力也更强。这些发现表明，面部表现力的个体间差异与个人和群体层面的不同社会结果有关。更具表现力的个人占据更多有益的社会地位，这可能有助于解释灵长类动物复杂面部交流的选择。
