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Biology of Reproduction, Vol 36, 328-332, Copyright © 1987 by Society for the Study of Reproduction

ARTICLES

Activation of estrus by pheromones in a marsupial: stimulus control and endocrine factors

BH Fadem

Little is known about the effects of social factors or about the hormonal control of social factors on reproduction in marsupials. In previous studies on the gray opossum, a small, Brazilian didelphid, the presence of males was found to activate reproduction in females. In this study, the effects of pheromones produced by intact males, castrated males, and intact females on estrus in female gray opossums was examined. It was found that females housed alone rarely showed spontaneous periods of estrus, that exposure to pheromonal cues provided by intact males reliably induced estrus in 75-100% of the experimental females, and that pheromonal cues provided by castrated males or intact, stimulus females induced estrus in 25% of the experimental females. These findings are discussed with respect to the ecology, social behavior, and reproductive characteristics of the didelphid marsupials.


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L. M. Jackson and J. D. Harder
Evidence for Spontaneous Postlactational Estrus in Gray Short-Tailed Opossums (Monodelphis domestica)
Biol Reprod, June 1, 2000; 62(6): 1823 - 1827.
[Abstract] [Full Text]


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Copyright © 1987 by the Society for the Study of Reproduction.