Peer separation in infant chimpanzees, a pilot study

Seven nursery reared chimpanzees (Pan troglodytes ), 7.5 to 10.5 months of age, were studied to determine the effects of a short period of separation from their peers on behavior and heart rate. The chimpanzees were separated from their mothers at birth, and reared in the nursery in a group living e...

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Bibliographic Details
Published in:Primates 1984, Vol.25 (1), p.78-88
Main Authors: SNYDER, D. S, GRAHAM, C. E, BOWEN, J. A, REITE, M
Format: Article
Language:English
Subjects:
Animal ethology
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Mammalia
Pan troglodytes
Psychology. Psychoanalysis. Psychiatry
Vertebrata
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Summary:Seven nursery reared chimpanzees (Pan troglodytes ), 7.5 to 10.5 months of age, were studied to determine the effects of a short period of separation from their peers on behavior and heart rate. The chimpanzees were separated from their mothers at birth, and reared in the nursery in a group living environment. Following separation, the isolated infants were behaviorally agitated, and exhibited increases in vocalizations, rocking and self-clasp behaviors, as well as changes in facial expression including cry face, whimper face and pout face. Time spent locomoting decreased in all seven animals during the separation period. Agitated behavior in the separated and isolated infants alternated with stationary withdrawn behavior. Individual differences were prominent. Day three of separation appeared to represent a point of transition with steretyped motor behaviors developing in the three isolated infants and in one control infant.
ISSN:0032-8332
1610-7365
DOI:10.1007/BF02382297