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Effect of rams on the onset of breeding activity in Clun Forest ewe lambs

Published online by Cambridge University Press:  27 March 2009

Ó. R. Dýrmundsson  and
J. L. Lees
Ó. R. Dýrmundsson
Affiliation:
Department of Agriculture, University College of Wales, Aberystwyth
J. L. Lees
Affiliation:
Department of Agriculture, University College of Wales, Aberystwyth
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Summary

Fifty Clun Forest ewe lambs with uniform birth dates were randomly stratified into two groups (A and B) of 25 each according to date of birth and body weight at 23 August 1971. On 26 August Group A (control) was joined with rams whilst Group B remained completely isolated from any contact with rams until 18 October.

The sudden introduction of rams to ewe lambs in the transition from non-breeding to breeding activity resulted in a high degree of synchronization of first matings in Group B. However, it did not affect the mean date of onset of oestrous activity.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 79 , Issue 2 , October 1972 , pp. 269 - 271
Copyright
Copyright © Cambridge University Press 1972

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References

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