Skip to main content Accessibility help
×
Home

Assessment of the proportion of chemical fat in the bodies of live sheep

  • J. C. Guerra (a1), C. J. Thwaites (a1) and T. N. Edey (a1)

Summary

The ability of subjectively assessed body condition scores, direct measurements of backfat depth, and an objective body condition index (based on the size/weight relationship), to predict the proportion of chemical fat in the body of the live sheep was investigated in three groups of Merino ewes. All three techniques possessed a similar, and practically acceptable ability to predict the proportion of chemical fat in the fleece-free empty body. However, both live weight and fleece-free empty body weight possessed similar predictive powers, and the method of choice in any particular situation could thus be determined by the availability of weighing facilities and the need for speed, objectivity and for minimizing interference with the experimental animals.

Copyright

References

Hide All
Allison, A. J. (1968). The influence of live weight on ovulation rate in the ewe. Proc. N. Z. Soc. Anim. Prod. 28, 115–19.
Barton, R. A. & Kirton, A. H. (1958). Carcass weight as an index of carcass components with particular reference to fat. J. agric. Sci., Camb. 50, 331–34.
Coop, I. E. (1962). Liveweight-productivity relationships in sheep. 1. Liveweight and reproduction. N.Z. Jl agric. Res. 5, 249–64.
Edey, T. N. (1968). Bodyweight and ovulation rate in sheep. Proc. Aust. Soc. Anim. Prod. 7, 188–91.
Gunn, R. G., Doney, J. M. & Russel, A. J. F. (1969). Fertility in Scottish Blackface ewes as influenced by nutrition and body condition at mating. J. agric. Sci., Camb. 73, 289–94.
Jefferies, B. C. (1961). Body condition scoring and its use in management. Tasm. J. Agric. 32, 1921.
Morris, J. G. & Moir, K. W. (1964). Methods of determining the chemical composition of dead animals. In Symposium on Carcase Composition and Appraisal of Meat Animals, ed. Tribe, D. E.. Melbourne, Australia: C.S.I.R.O.
Russel, A. J. F., Doney, J. M. & Gunn, R. G. (1969). Subjective assessment of body fat in live sheep. J. agric. Sci., Camb. 72, 451–54.
Setchell, B. P., Bassett, J. M., Briggs, P. K. & Panaretto, B. A. (1965). Techniques for investigating body growth. In Field Investigations with Sheep – A Manual of Field Techniques, ed. Moule, G. R.. Melbourne, Australia: C.S.I.R.O.
Turner, H. N., Hayman, R. H., Riches, J. H., Roberts, N. F. & Wilson, L. T. (1953). Physical definition of sheep and their fleece for breeding and husbandry studies. Div. Rep. no. 4, Div. Anim. Health Prod., C.S.I.R.O., Australia.
Wallace, L. R. (1961). Flushing of ewes. N.Z. Jl Agric. 83, 377–80.
White, A., Handler, P. & Smith, E. L. (1964). Principles of Biochemistry. London: McGraw-Hill.

Assessment of the proportion of chemical fat in the bodies of live sheep

  • J. C. Guerra (a1), C. J. Thwaites (a1) and T. N. Edey (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed