Release of androgens and cortisol during social challenging in common marmoset females

Coelho, Nicole Leite Galvão; Sousa, Maria Bernardete Cordeiro de

Release of androgens and cortisol during social challenging in common marmoset females

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dc.contributor.author	Coelho, Nicole Leite Galvão
dc.contributor.author	Sousa, Maria Bernardete Cordeiro de
dc.date.accessioned	2017-11-06T11:35:20Z
dc.date.available	2017-11-06T11:35:20Z
dc.date.issued	2010-09
dc.description.resumo	One of the most important and extensively studied social behaviors exhibited by animals is aggression. However, the relationships between agonistic behavior and hormones such as androgens and cortisol are complex. In some species, including humans, a high testosterone/cortisol ratio results from social competition and, as a consequence, from the expression of aggressive behavior. Although studies in this area have been carried out mostly in males, females also react to social stressors, responding differently from males. Sex-related differences in stress response using experimental models in biomedical research have been increasingly emphasized. Since common marmosets (Callithrix jacchus), a small neotropical primate, have been widely used in biomedical research, we investigated three dyads of adult common marmoset females to determine if fecal androgens and cortisol are associated to the expression of aggressive behavior. The study encompasses 3 phases: (1) baseline, which starts with dyad pairing, lasting one month; (2) isolation and (3) reunion, lasting 7 days each. Increased fecal cortisol and androgens were observed during isolation (F= 4.29; p= 0.01) and reunion (F= 4.16; p= 0.02) respectively, compared to baseline phase values. When the data from all phases were analyzed together, a positive significant correlation between androgens and agonistic behaviors of scent-marking (r= 0.22; p< 0.05) and individual piloerection (r= 0.43; p< 0.05) was also observed. These findings suggest that social isolation triggers an anxiety-like response, while reunion induces hormonal changes that characterize an aggressive response, probably due to competition between females to restore social rank. Future studies focusing on factors that could be interfering in the endocrine and behavioral response to social and nonsocial challenges in males and females, such as relatedness and previous social dynamics between females, might contribute to the better understanding of the mechanisms that trigger aggression and competition to establish social rank in marmosets.	pt_BR
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/24166
dc.language	eng	pt_BR
dc.rights	Acesso Aberto	pt_BR
dc.subject	Stress	pt_BR
dc.subject	Hormones	pt_BR
dc.subject	Behavior	pt_BR
dc.subject	Aggression	pt_BR
dc.subject	Common marmosets	pt_BR
dc.title	Release of androgens and cortisol during social challenging in common marmoset females	pt_BR
dc.type	article	pt_BR