Erwin J
Lab Anim Sci. 1977 Aug;27(4):541-7.
Several experiments and surveys were conducted in a large colony of pigtail macaques (Macaca nemestrina) to determine some of the influences of spatial and social factors on aggressive behavior and risk of trauma. Female subjects exhibited more aggression when they had access to two-room suites than when they had access to single rooms. The frequency of aggressive interactions among females was positively related to the number of females per group. The presence of one or more males in groups inhibited aggressive interaction among females. Less aggression occurred among females in groups containing infants than in groups containing no infants. Provision of cover by introduction of concrete cylinders into rooms reduced aggression among members of stable groups. Subjects in newly-formed groups composed of unfamiliar animals sustained fewer injuries than did those in groups formed by merger of groups or subgroups of familiar animals.
在一大群豚尾猕猴（食蟹猴）中进行了多项实验和调查，以确定空间和社会因素对攻击行为和受伤风险的一些影响。雌性受试对象在能使用两居室套房时比只能使用单人间时表现出更多的攻击性。雌性之间攻击互动的频率与每组中的雌性数量呈正相关。群体中有一个或多个雄性会抑制雌性之间的攻击互动。有婴儿的群体中雌性之间的攻击性比没有婴儿的群体中要少。通过在房间里引入混凝土圆柱体提供遮蔽物，减少了稳定群体成员之间的攻击性。由不熟悉的动物组成的新群体中的受试对象比由熟悉动物的群体或子群体合并而成的群体中的受试对象受伤更少。
