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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

Croker, K. P. and Lindsay, D. R. 1970. The mating behavior of rams. J. Agric. West. Aust. 11: 189–191.Google Scholar
Dawe, S. T. 1970. The comparative reproductive performance of ewes joined to one or three per cent of rams. Proc. Aust. Soc. Anim. Prod. 8: 317–320.Google Scholar
Evans, J. S., Dutt, R. H. and Simpson, E. C. 1962. Breeding performance in ewes after synchronizing estrus by feeding 6-methyl-17-actoxyprogesterone. J. Anim. Sci. 21: 804–808.CrossRefGoogle Scholar
Hulet, C. V., Ercanbrack, S. K., Price, D. A., Blackwell, R. L. and Wilson, L. O. 1962. Mating behavior of the ram in the one-sire pen. J. Anim. Sci. 21: 857–864.CrossRefGoogle Scholar
Hulet, C. V. and Foote, W. C. 1967. Induction of fertile estrus in lactating and dry anestrous ewes using oral progestogens and repeated PMS treatment. J. Anim. Sci. 26: 545–548.CrossRefGoogle ScholarPubMed
Steel, R. G. D. and Torrie, J. H. 1960. Principles and Procedures of Statistics. McGraw- Hill Book Co, New York.Google Scholar