Agression in male Barbary Macaques (Macaca sylvanus). At AAP, an all-male group of 17 Barbary Macaques is housed. Although aggression is noted to vary from time to time, it is not clear whether the amount of aggression is related to the season changes. Therefore, a study will performed to determine whether or how aggression is related to season or other factors. This group is planned to be reho...