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Quantitative estimates of lamb carcass composition 1. Sample joints

Published online by Cambridge University Press:  02 September 2010

V. M. Timon  and
Maurice Bichard
V. M. Timon
Affiliation:
School of Agriculture, University of Newcastle-upon-Tyne
Maurice Bichard
Affiliation:
School of Agriculture, University of Newcastle-upon-Tyne
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Summary

Interrelationships between carcass composition and the composition of 7 different sample joints were studied in 83 purebred Clun Forest lambs slaughtered at approximately 80 lb. live-weight and ranging in carcass weight from 29 to 42 lb. Correlation coefficients between physically separated fat, muscle and bone in the loin and in the carcass were 0·96, 0·93 and 0·84 respectively (P < 0·01). Corresponding correlations for the best-neck (7–12 rib joint) were 0·94, 0·92 and 0·76 (P < 0·01). The leg and shoulder provided the best estimates of carcass bone. The usefulness of predictions of carcass composition is discussed in relation to the maximum probable errors associated with individual and group mean predictions of carcass composition based on sample joints and with reference to the accuracy of these indices under different treatment conditions. The 5% confidence limits on individual predictions based on loin composition were ± 2.22%, ± 2.44% and ± 1.62 % for fat muscle and bone respectively; indicating that this index cannot be relied on to reflect small differences in carcass composition between individual animals.

Type
Research Article
Information
Animal Production , Volume 7 , Issue 2 , June 1965 , pp. 173 - 181
Copyright
Copyright © British Society of Animal Science 1965

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References

REFERENCES

Barton, R. A., & Kirton, A. H., 1958. The leg and the loin as indices of the composition of New Zealand lamb and mutton carcasses. N.Z. J. agric. Res., 1: 783–789.CrossRefGoogle Scholar
Carroll, M. A., 1963. Reliability in dissecting and measuring lamb carcasses. Anim. Prod., 5: 220 (Soc. Proa).Google Scholar
Duncum, W. J., 1949. A Picture Guide to Dissection. Practical Press (London).Google Scholar
Field, R. A., Kemp, J. D., & Varney, W. Y., 1963. Indices for lamb carcass composition. J. Anim. Sci., 22: 218–221.CrossRefGoogle Scholar
Gee, I., & Preston, T. R., 1957. The effect of hexoestrol implantation on carcass composition and efficiency of food utilization. Brit. J. Nut., 11: 329–338.CrossRefGoogle ScholarPubMed
Hankins, O. G., 1947. Estimation of the composition of lamb carcasses and cuts. U.S.D.A. Tech. Bull. no. 944.Google Scholar
Hankins, O. G., Gaddis, A. M., & Sulzbacher, W. L., 1959. Meat research techniques pertinent to animal production research. In Techniques and Procedures in Animal Production Research. Am. Soc. Anim. Prod. pp. 195–228.Google Scholar
Harrington, G., 1962. The leanness of bacon pigs in relation to carcass measurements. Anim. Prod., 4: 295 (Soc. Proc).Google Scholar
Kirton, A. H. & Barton, R. A., 1958. Live weight loss and its components in Romney ewes subjected to L-thyroxine therapy and a low plane of nutrition. Part 1. Effects on live weight, carcass weight and carcass composition. J. agric. Sci., 51: 265–281.CrossRefGoogle Scholar
Kirton, A. H., & Barton, R. A., 1962. Study of some indices of the chemical composition of lamb carcasses. J. Anim. Sci., 21: 553–557.CrossRefGoogle Scholar
McCarthy, M. D., & Boyle, C., 1946. The accuracy of monthly, six-weekly and two monthly weighings in estimating milk yields. J. Dept. Agric. Eire, 43: 5–23.Google Scholar
Palsson, H., 1939. Meat crosses in the sheep with special reference to Scottish breeds and crosses. I. J. agric. Sci., 29: 544–626.CrossRefGoogle Scholar
Shorland, F. B., de la Mare, P. B. D., Sorreix, D. M. P., & Barnicoat, C. R., 1947. Simplified procedures for determining the nutritive value of carcasses with special reference to New Zealand lamb and mutton. N.Z. J. Sci. Tech., 29A: 76–90.Google Scholar
Snedecor, G. W., 1959. Statistical Methods. Iowa State College Press, Ames., Ia.Google Scholar
Timon, V. M., 1963. The measurement and inheritance of lamb carcass traits. Ph.D. Thesis. Durham University School of Agriculture, Kings College, Newcastle-on-Tyne.Google Scholar
Wallace, L. R., 1948. Growth of lambs before and after birth in relation to nutrition. J. agric. Sci., 38: 93–153.CrossRefGoogle Scholar