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Contested dominance modifies the anovulatory consequences of social subordination in female marmosets BJMBR
Alencar,A.I.; Sousa,M.B.C.; Abbott,D.H.; Yamamoto,M.E..
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...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Callitrichids; Dominance; Progesterone levels; Agonistic behavior; Marmosets.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000500012
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Fecal androgen levels in common marmoset (Callithrix jacchus) males living in captive family groups BJMBR
Castro,D.C.; Sousa,M.B.C..
In captive common marmoset groups, the reproductive inhibition observed in subordinate female seems to be a result of olfactory, visual and behavioral cues from the dominant female. However, few studies have examined the relationship among adult males living in the same social group. These studies have shown that reproductive failure among peer males seems to be based on hormonal and behavioral mechanisms. New insights on sexual strategies in primates have been shown using fecal steroids, but so far no information is available for common marmoset males. In the present study, we evaluated the influence of light-dark cycle, age and reproductive condition on the profile of fecal androgens in males living in the same family group. Feces were collected from six...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Common marmosets; Fecal androgens; Male sexual strategies; Circadian variation; Reproductive suppression.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000100011
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