Hostname: page-component-77c89778f8-rkxrd Total loading time: 0 Render date: 2024-07-17T09:44:38.005Z Has data issue: false hasContentIssue false
  • English
  • Français

A note on effects of lambing at one year and farm production level on the performance of prolific ewes

Published online by Cambridge University Press:  02 September 2010

I. Omar ,
C. Jordan  and
C. Smith
I. Omar
Affiliation:
ARC Animal Breeding Research Organization, West Mains Road, Edinburgh EH9 3JQ
C. Jordan
Affiliation:
ARC Animal Breeding Research Organization, West Mains Road, Edinburgh EH9 3JQ
C. Smith
Affiliation:
ARC Animal Breeding Research Organization, West Mains Road, Edinburgh EH9 3JQ
Get access

Summary

Data from a large field trial comparing the performance of contemporary crossbred ewes from traditional and experimental prolific rams were used to study two factors, (1) the influence of lambing at 1 yr of age on subsequent ewe performance and (2) the effect of level of farm performance on the difference between the traditional and the prolific types. Neither effect was found to be important.

Type
Research Article
Information
Animal Production , Volume 25 , Issue 3 , December 1977 , pp. 389 - 392
Copyright
Copyright © British Society of Animal Science 1977

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Carter, R. C., Carman, G. M., McClaugherty, F. S. and Haydon, P. S. 1971. Genotype-environment interaction in sheep. I. Ewe productivity. J. Anim. Sci. 33: 556–562.CrossRefGoogle ScholarPubMed
Deeble, F. K. and Barker, J. D. 1976. Finnish Landrace × Border Leicester rams as sires of crossbred ewes. Eur. Assn. Anim. Prod. Aug. 1976, Zurich.Google Scholar
Dýrmundsson, Ó. R. 1973. Puberty and early reproductive performance in sheep. I. Ewe lambs. Anim. Breed. Abst. 41: 273–289.Google Scholar
Keane, M. G. 1974. Effect of previous lambing on body weight and reproductive performance of hoggets. Ir. J. agric. Res. 13: 191–196.Google Scholar
Meyer, H. H. and Bradford, G. E. 1973. Reproduction in Targhee and Finnish Landrace × Targhee ewes. J. Anim. Sci. 36: 847–853.CrossRefGoogle ScholarPubMed
Russell, W. S. 1973. Compreg User's Guide, IU/RC Series Report No. 5. Program Library Unit, University of Edinburgh.Google Scholar
Tyrell, R. N., Fooarty, N. M., Rearing, R. D. and McGuirk, B. J. 1974. A comparison of the subsequent production by Border Leicester × Merino ewes first joined as weaners or at 18 months of age. Proc. Aust. Soc. Anim. Prod. 10: 270–273.Google Scholar