Depression Can Be Induced in a Bonnet Macaque Infant

Abstract
Depression is a well-known reaction to separation in all species of macaques studied except the bonnet (Macaca radiata), in whom this reaction has never before been observed. The depressive response of postural collapse and social withdrawal in a bonnet infant was produced by altering the social structure of the group in which it lived in a way calculated to interfere with the species-typical system of social support.

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