Abstract
Various functional theories of play stress that social play is essential for the practice and learning of sex roles, dominance relationships, troop culture, integration of individuals into the troop structure, the control of aggression, etc. Data on squirrel monkeys (Saimiri) in natural environments indicate that social interaction and troop integration can develop in various manners in the absence of social play.
Comparative observations were made on squirrel monkeys in a seminatural environment in Florida and 43 natural environments in Panama, Colombia, Peru, and Brazil. There was a broad range of variance in the data on ecology, troop size, troop cohesiveness, average individual distances, frequency of play, etc. In some environments, individuals in the infant and juvenile age classes engaged in social play for approximately 1.5 to 3 hours a day. However, in one environment, not a single incidence of social play occurred during 261 hours of close range observation. The troops in which no play occurred were very cohesive (i.e., they seldom fragmented), and the animals traveled at close individual distances. Agonistic interactions were not uncontrolled. Copulations were observed; and 85 percent of the adult females were accompanied by infants, which indicates a normal rate of reproductive success for the species.
Data are presented on friendly, aggressive, sexual, and spacing behavior in squirrel monkeys. These data indicate that (1) social play is not necessary for the development and/or learning of an adaptive modicum of social interaction patterns and troop cohesion, but (2) the opportunity to play provides learning experiences in which young animals can develop more complex, varied social interaction patterns and stronger habits for engaging in frequent social exchanges.
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Baldwin, J.D., Baldwin, J.I. The role of play in social organization: Comparative observations on squirrel monkeys (Saimiri). Primates 14, 369–381 (1973). https://doi.org/10.1007/BF01731358
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DOI: https://doi.org/10.1007/BF01731358