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Blanchard, R. J., J. N. Nikulina, R. R. Sakai, C. McKittrick, B. McEwen and D. C. Blanchard. Behavioral and endocrine change following chronic predatory stress. Physiol Behav 63(4) 561-569, 1998. Adult male rats showed very high levels of crouching when exposed to a cat, with suppression of the nondefensive behaviors (e.g., lying, locomotion, rearing) that were shown by toy cat-exposed controls. The...
In mixed-sex rat groups maintained in visible burrow systems (VBS), consistent asymmetries in offensive and defensive behaviors of male dyads are associated with the development of dominance hierarchies. Subordinate males are characterized by particular wound patterns, severe weight loss, and a variety of behavioral changes, many of them isomorphic to target symptoms of clinical depression. In two...
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