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Title: Contested dominance modifies the anovulatory consequences of social subordination in female marmosets
Authors: Alencar, A. I.
Sousa, Maria Bernardete Cordeiro de
Abbott, D.H.
Yamamoto, Maria Emília
Keywords: Callitrichids;Progesterone levels;Agonistic behavior;Marmosets;Sagui - Comportamento;Os níveis de progesterona
Issue Date: 2006
Publisher: Braz J Med Biol Res
Citation: Alencar, A. I. ; Sousa, M. B. C. ; Abbott, D. H. ; Yamamoto, M . E. Contested dominance modifies the anovulatory consequences of social subordination in female marmosets. Brazilian Journal of Medical and Biological Research , São Paulo, Brasil, v. 39, n. 4, p. 647-658, 2006
Abstract: Dominance status among female marmosets is reflected in agonistic behavior and ovarian function. Socially dominant females receive submissive behavior from subordinates, while exhibiting normal ovulatory function. Subordinate females, however, receive agonistic behavior from dominants, while exhibiting reduced or absent ovulatory function. Such disparity in female fertility is not absolute, and groups with two breeding females have been described. The data reported here were obtained from 8 female-female pairs of captive female marmosets, each housed with a single unrelated male. Pairs were classified into two groups: “uncontested” dominance (UD) and “contested” dominance (CD), with 4 pairs each. Dominant females in UD pairs showed significantly higher frequencies (4.1) of agonism (piloerection, attack and chasing) than their subordinates (0.36), and agonistic behaviors were overall more frequently displayed by CD than by UD pairs. Subordinates in CD pairs exhibited more agonistic behavior (2.9) than subordinates in UD pairs (0.36), which displayed significantly more submissive (6.97) behaviors than their dominants (0.35). The data suggest that there is more than one kind of dominance relationship between female common marmosets. Assessment of progesterone levels showed that while subordinates in UD pairs appeared to be anovulatory, the degree of ovulatory disruption in subordinates of CD pairs was more varied and less complete. We suggest that such variation in female-female social dominance relationships and the associated variation in the degree and reliability of fertility suppression may explain variations of the reproductive condition of free-living groups of common marmosets
ISSN: 0100-879X
Appears in Collections:CB - DFIS - Artigos publicados em periódicos

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