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Effects of ewe proximity on peripheral plasma testosterone levels and behaviour in the ram

Effects of ewe proximity on peripheral plasma testosterone levels and behaviour in the ram Summary. Groups of yearling and immature rams were kept for 6 months during the breeding season either adjacent to or apart from ovariectomized ewes in which oestrus was induced by hormone therapy. The older rams kept near ewes were found to have larger testes, higher plasma testosterone levels and greater sexual and aggressive activity, although the immature animals showed no response. Plasma testosterone concentration was also found to increase after copulation in some animals. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Reproduction Bioscientifica

Effects of ewe proximity on peripheral plasma testosterone levels and behaviour in the ram

Reproduction , Volume 48 (1) – Sep 1, 1976

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Publisher
Bioscientifica
Copyright
Copyright © 1976 The Authors. All Rights Reserved.
ISSN
1470-1626
eISSN
1741-7899
DOI
10.1530/jrf.0.0480025
Publisher site
See Article on Publisher Site

Abstract

Summary. Groups of yearling and immature rams were kept for 6 months during the breeding season either adjacent to or apart from ovariectomized ewes in which oestrus was induced by hormone therapy. The older rams kept near ewes were found to have larger testes, higher plasma testosterone levels and greater sexual and aggressive activity, although the immature animals showed no response. Plasma testosterone concentration was also found to increase after copulation in some animals.

Journal

ReproductionBioscientifica

Published: Sep 1, 1976

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