Free-Ranging Rhesus Monkeys: Age and Sex Differences in Individual Activity Patterns

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Science  28 Jan 1966:
Vol. 151, Issue 3709, pp. 476-478
DOI: 10.1126/science.151.3709.476


Two hundred thirty of the feral rhesus monkeys on Cayo Santiago were observed individually for postural adjustments, locomotor behavior, manipulation, and other nonsocial activities. Both form and frequency of activity were influenced strongly by age; sex differences were minimal. Most activities decreased with age, but head movements, presumably reflecting visual scanning, were more frequent in adults.