Resumo

DALMASO, Alice Copetti  e  CODENOTTI, Thais Leiroz. Hierarchy and dominance behaviors in brown howler monkey groups Alouatta guariba clamitans (Cabrera, 1940) in captivity. Rev. etol. [online]. 2010, vol.9, n.2, pp. 40-47. ISSN 1517-2805.

This study was done with two groups of brown howler monkeys in captivity, at the Centro de Acolhimento de Primatas e Aves (PRIMAVES). The aim was to identify hierarchy and dominance behaviors through quantification and duration of conducts, comparing the data with information already described for Alouatta genus. A total of 172 hours of observations were carried out, and from the quantification of grooming (non-agonistic social category), roaring (agonistic social category), vigilance (alert category) and eating (feeding category), both groups showed an evident dominance between the individuals, with the youthful males performing a certain degree of spatial centralization, showed through roaring and vigilance behaviors. The females are active in vigilance and grooming, showing an important role in the maintenance of social stability, providing to the group that lives in captivity an appeasing relation between the individuals.

Palavras-chave : Brown howler monkey; Alouatta guariba clamitans; Hierarchy; Dominance.

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