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Effect of timing of ram introduction on fertility in progestagen-PMSG treated anoestrous ewes

Published online by Cambridge University Press:  27 March 2009

M. P. Boland  and
I. Gordon
M. P. Boland
Affiliation:
Department of Agriculture, University College, Lyons, Newcastle P.O., Co. Dublin, Eire
I. Gordon
Affiliation:
Department of Agriculture, University College, Lyons, Newcastle P.O., Co. Dublin, Eire
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Extract

In exploiting to the full the possible advantages of a synchronized oestrus in ewes, the mating management of the ram requires special attention. Previous recommendations (Gordon, 1963) on ram management stated that progestagen-PMSG synchronized ewes should be run with rams at a ram to ewe ratio of 1:10 in the days following treatment. Preliminary work from this laboratory has shown that delaying the introduction of rams until 48 h following sponge withdrawal could improve conception rates significantly (Joyce, 1972). The purpose of the present experiment was to investigate further the effect of time of ram introduction on ewe fertility following oestrous synchronization.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 92 , Issue 1 , February 1979 , pp. 247 - 249
Copyright
Copyright © Cambridge University Press 1979

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References

Fletcher, I. C. & Lindsay, D. R. (1971). Effect of rams on the duration of oestrus behaviour in ewes. Journal of Reproduction and Fertility 25, 253–259.CrossRefGoogle ScholarPubMed
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