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Enhancement of Teaser Ram Activity Using Exogenous Melatonin

Published online by Cambridge University Press:  24 November 2017

Margaret E King ,
Sharon McCombes ,
J S M Hutchinson ,
Moira Donald  and
Linda M Mitchell
Margaret E King
Affiliation:
The Scottish Agricultural College, 581 King Street, Aberdeen AB9 1UD
Sharon McCombes
Affiliation:
The University of Aberdeen, 581 King Street, Aberdeen, AB9 1UD
J S M Hutchinson
Affiliation:
The University of Aberdeen, 581 King Street, Aberdeen, AB9 1UD
Moira Donald
Affiliation:
The University of Aberdeen, 581 King Street, Aberdeen, AB9 1UD
Linda M Mitchell
Affiliation:
The Scottish Agricultural College, 581 King Street, Aberdeen AB9 1UD
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Extract

Under Australasian conditions vasectomised (teaser) rams are widely and successfully used for the induction and synchronisation of oestrus in ewes. However under UK conditions success has been limited possibly as a consequence of the more marked seasonality exhibited by UK sheep stocks. The transitional phase of ewes in July at latitude 57°N may require a greater degree of stimulation than can be achieved using teaser rams at 2-4% of the flock. The rams may also be in sub-optimal breeding status resulting in lowering of their libido and hence stimulatory effect on the ewes.

Type
Sheep
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1992 , March 1992 , pp. 172
Copyright
Copyright © The British Society of Animal Production 1992

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