Behavior of Free-Ranging Macaques after Intraventricular 6-Hydroxydopamine

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Science  28 Sep 1973:
Vol. 181, Issue 4106, pp. 1256-1258
DOI: 10.1126/science.181.4106.1256


Macaques (Macaca mulatta) observed in a free-ranging colony on Guayacan Island, Puerto Rico, were significantly different in their social interactions, initiatives, facial expressions, and postures after intraventricular 6-hydroxydopamine compared with sham-treated and field controls. This study extends the known effects of 6-hydroxydopamine and catecholamine depletion to the social interactions of a higher primate species under free-ranging conditions.