Contested dominance modifies the anovulatory consequences of social subordination in female marmosets.

Contested dominance modifies the anovulatory consequences of social subordination in female marmosets. Research Abstract Details 

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Contested dominance modifies the anovulatory consequences of social subordination in female marmosets. Abstract Text:

A I Alencar,M B C Sousa,D H Abbott,M E Yamamoto,

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.

Contested dominance modifies the anovulatory consequences of social subordination in female marmosets. Publishing Authors By Initials

AI Alencar,MB Sousa,DH Abbott,ME Yamamoto,

For similar polycyclic compounds: steroids: pregnanes: pregnenes: pregnenediones: progesterone research abstracts see: polycyclic compounds: steroids: pregnanes: pregnenes: pregnenediones: progesterone research

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Contested dominance modifies the anovulatory consequences of social subordination in female marmosets. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Brazilian journal of medical and biological resear

VOLUME: 39

Page Numbers: 647-58

Journal Abbreviation: Braz. J. Med. Biol. Res.

ISSN: 0100-879X

DAY: 20

MONTH: 04

YEAR: 2006

Contested dominance modifies the anovulatory consequences of social subordination in female marmosets. Information

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LANGUAGE: eng

NlmUniqueID: 8112917

Contested dominance modifies the anovulatory consequences of social subordination in female marmosets. Keywords Mesh Terms:

KEYWORDS: Progesterone

MESH TERMS: analysis

Chemical & Substance for Abstract: Contested dominance modifies the anovulatory consequences of social subordination in female marmosets. Information

Substance Name: Progesterone

Registry Number: 57-83-0

Grant and Affiliation Information for Contested dominance modifies the anovulatory consequences of social subordination in female marmosets.

AFFILIATION: Departamento de Fisiologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brasil.

Country: Brazil

AGENCY: United States NCRR

GRANT: RR000167

ACRONYM: RR

MEDLINETA: Braz J Med Biol Res

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