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A note on the effect of ram to ewe ratio on reproductive performance of synchronized ewes

Published online by Cambridge University Press:  02 September 2010

D. B. Laster  and
H. A. Glimp
D. B. Laster
Affiliation:
US Department of Agriculture, Clay Center, Nebraska 68933, USA
H. A. Glimp
Affiliation:
US Department of Agriculture, Clay Center, Nebraska 68933, USA
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Summary

Two hundred and four Targhee ewes and 15 rams were used to study the effect of the number of ewes per ram on mating activity and conception rate in ewes mated after synchronizing oestrus with intravaginal, progestinated pessaries. Each ram was mated with 8, 12, 16 or 20 ewes.

The number of ewes per ram had no influence on the percentage of ewes mated or conception rate at the synchronized oestrus. It also had no effect on percentage of ewes lambing, number of lambs born per ewe lambing or average lambing date. Seventy-six% of the ewes were marked within 8 days after progestagen treatment with a conception rate of 84-5%. This study demonstrated that one ram per 20 ewes is sufficient for maximum mating activity and conception rate in ewes mated at a synchronized oestrus.

Type
Research Article
Information
Animal Production , Volume 15 , Issue 1 , August 1972 , pp. 99 - 102
Copyright
Copyright © British Society of Animal Science 1972

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References

REFERENCES

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