Gender and environment as determinants of behavior in infant common baboons (Papio cynocephalus).

Two groups of infant baboons were observed. The breast-fed group was housed in a gang cage with nursing mothers (n = 13) and the other motherless group was in a wire-cage nursery habitat (n = 20). Differences in behavior due to gender and environment were tested by analysis of variance. The results do not support the hypothesis that innate sex differences exist in baboons aged 0-3 months. Nursery-reared subjects had significantly higher scores for rough-and-tumble play, stereotypy, threat, avoid, explore, high tension, and nonaggressive social behaviors, but these behaviors are not significantly different between sexes in either groups.