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Repeated fence-line ram exposure advances the timing and improves the synchrony of oestrus and lambing in ewes

Published online by Cambridge University Press:  20 November 2017

P.A.R. Hawken ,
A.C.O. Evans  and
A.P. Beard
P.A.R. Hawken*
Affiliation:
Department of Agriculture, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK.
A.C.O. Evans*
Affiliation:
Department of Animal Science and Production, Conway Institute for Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
A.P. Beard*
Affiliation:
Department of Agriculture, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK.
*
E-mail: p.a.r.hawken@ncl.ac.uk
alex.evans@ucd.ie
a.p.beard@ncl.ac.uk
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Extract

Introduction of a ram to anoestrous ewes induces an almost instantaneous rise in LH pulse frequency. This is commonly sufficient to overcome the seasonal suppression of the hypothalamic-pituitary axis and induce a synchronous first ovulation. This study investigates the application of repeated fence-line ram exposure during the beginning of the breeding season to synchronize oestrus and subsequent lambing in ewes.

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2003 , 2003 , pp. 79
Copyright
Copyright © The British Society of Animal Science 2003

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