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. 1982;3(1-4):143-151.
doi: 10.1002/ajp.1350030113.

Behavior and plasma cortisol following brief peer separation in juvenile squirrel monkeys

Michael B Hennessy  1 , Sally P Mendoza  2 , Joel N Kaplan  1
Affiliations

Behavior and plasma cortisol following brief peer separation in juvenile squirrel monkeys

Michael B Hennessy et al. Am J Primatol. 1982.

Abstract

The effects of 30-min separation from peers on behavior and plasma cortisol levels were studied in juvenile, mother-reared, female squirrel monkeys, housed in triads. Juveniles vocalized much more frequently when isolated in a novel room than they did when either undisturbed, handled only, placed with both peers in a novel room, or separated from one peer and housed with the other in the home cage. When separated from one peer in the home cage, the monkeys engaged in putative scent-marking behaviors more frequently than when undisturbed. Exposure to the novel room resulted in increased vocalizing, and decreased locomotor activity and scent marking, regardless of whether the subject was isolated or with peers. Plasma cortisol levels were elevated following all manipulations and no effects could be attributed specifically to separation or exposure to novelty. These results demonstrate that brief separation from peers can evoke a behavioral reaction in juvenile squirrel monkeys that resembles the behavioral "protest" response of maternally-separated infants, and that the response of juveniles, like that of infants, varies greatly with the separation procedure employed.

Keywords: cortisol; juveniles; peer separation; protest behavior; squirrel monkey.

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References

    1. Baldwin, J. D. The ontogeny of social behaviour of squirrel monkeys (Saimiri sciureus) in a seminatural environment. Folia Primatologica 4: 35–79, 1969.
    1. Bowden, D. M.; McKinney, W. T. Behavioral effects of peer separation, isolation, and reunion on adolescent male rhesus monkeys. Developmental Psychobiology 5: 353–362, 1972.
    1. Coe, C. L.; Mendoza, S. P.; Smotherman, W. P.; Levine, S. Mother‐infant attachment in the squirrel monkey: adrenal response to separation. Behavioral Biology 22: 256–263, 1978.
    1. Erwin, J.; Mobaldi, J.; Mitchell, G. Separation of rhesus monkey juveniles of the same sex. Journal of Abnormal Psychology 78: 134–139, 1971.
    1. Erwin, J.; Brandt, E. M.; Mitchell, G. Attachment formation and separation in heterosexually naive preadult rhesus monkeys (Macaca mulatta). Developmental Psychobiology 6: 531–538, 1973.