Hostname: page-component-5c6d5d7d68-tdptf Total loading time: 0 Render date: 2024-08-16T04:20:14.389Z Has data issue: false hasContentIssue false
  • English
  • Français

Carcass composition of fattened rams and wethers of Sudan Desert sheep

Published online by Cambridge University Press:  27 March 2009

A. H. Osman ,
S. A. El Shafie  and
A. G. H. Khattab
A. H. Osman
Affiliation:
University of Khartoum, Shambat, Sudan
S. A. El Shafie
Affiliation:
University of Khartoum, Shambat, Sudan
A. G. H. Khattab
Affiliation:
University of Khartoum, Shambat, Sudan
Get access Rights & Permissions [Opens in a new window]

Summary

Carcass yield and chemical composition of edible meat of fifteen fattened yearling rams and fifteen fattened yearling wethers of Sudan Desert sheep were studied. The animals studied were random samples from groups which had been fattened for 2 months on three different rations. They were about 14 months old at slaughter, and their weights at slaughter ranged from 25 to 52 kg. The average dressing percentage for rams and wethers was 53·0 and 52·2% respectively. Warm carcass weights were 20·22 kg for rams and 19·64 kg for wethers, and these carcasses lost 4·2 and 3·1% of their weight respectively, after 48 h storage in the cold room at 0°C. The bone content of carcasses of rams and wethers was 23·4 and 21·3% respectively. The longissimus dorsi ‘loin eye’ area at the 12th rib was 8·6 cm2 and 8·3 cm2 for rams and wethers. The proportions of wholesale cuts in ram and wether carcasses were comparable, whereas the proportions of slaughter by-products varied between the two ‘sexes’. Mean weight of kidney fat in wethers was 50% greater than in intact rams, but the mesenteric and caul fat was heavier in rams than in wethers.

Ram carcasses had higher specific gravity than those of wether carcasses. Specific gravity was negatively correlated with fat content and positively correlated with protein, moisture and ash content of the edible meat of the carcass. The regression equations relating specific gravity to the major chemical components of meat had too high standard errors to be of predictive value in a practical sense.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 75 , Issue 2 , October 1970 , pp. 257 - 263
Copyright
Copyright © Cambridge University Press 1970

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

Association Of Official Agricultural Chemists (1965). Official Methods of Analysis, 9th ed.Washington 4, D.C.: Ass. Off. Agric. Chemists.Google Scholar
Bailey, C. M., Pope, A. L. & Chapman, A. B. (1961). Predicting loin-eye area in lambs from weaning traits and carcass measurements. J. Anim. Sci. 20, 302–6.Google Scholar
Barton, R. A. & Kirton, A. H. (1956). Determination of fat in mutton carcasses by measurement of specific gravity. Nature, Lond. 178, 920.CrossRefGoogle Scholar
Bennett, S. C. J., John, E. R. & Hewison, J. W. (1954). Animal Husbandry. In Agriculture in the Sudan ch. 22. Ed. Tothill, J. D.. London: Oxford University Press.Google Scholar
Bieber, D. D., Saffle, R. A. & Kamstra, L. D. (1961). Calculation of fat and protein content of beef from specific gravity and moisture. J. Anim. Sci. 20, 239–42.Google Scholar
Bradford, G. E. & Spurlock, G. M. (1964). Effects of castrating lambs on growth and body composition. Anim. Prod. 6, 291–9.Google Scholar
Garrett, W. N., Meyer, J. H. & Lofgreen, G. P. (1959). The comparative energy requirements of sheep and cattle for maintenance and gain. J. Anim. Sci. 18, 528–47.CrossRefGoogle Scholar
Hammond, J. (1932). Growth and the Development of Mutton Qualities in the Sheep. London: Oliver and Boyd.Google Scholar
Hankins, O. G. (1947). Estimation of the composition of lamb carcassos and cuts. Tech. Bull. U.S. Dep. Agric. no. 944.Google Scholar
Kennick, W. H., England, D. C. & Anglemier, A. F. (1963). Method of estimating percent of protein and fat in the boneless portion of steer carcasses. J. Anim. Sci. 22, 989–92.CrossRefGoogle Scholar
Khandekar, V. N., Goldstone, C. L. & McManus, W. R. (1965). Some indices of the carcass composition of Dorset Horn Top Cross lambs. I. Measurements on the live body and carcass, the composition of sample joints and their relationship to carcass composition. J. agric. Sci., Camb. 65, 147–54.CrossRefGoogle Scholar
Kirton, A. H. & Barton, R. A. (1958). Specific gravity as an index of the fat content of mutton carcasses and various joints. N.Z. Jl agric. Res. 1, 633–41.CrossRefGoogle Scholar
Latham, S. D., Moody, W. G. & Kemp, J. D. (1966). Techniques for estimating lamb carcass composition. J. Anim. Sci. 25, 492–96.CrossRefGoogle Scholar
Manzuruddin, A., Qazi, A. Q. & Schneider, B. H. (1962). Some sheep fattening experiments in Pakistan. B. Effects of fattening on quality of meat. Pakist. J. Anim. Sci. 1, 34–52.Google Scholar
Mason, I. L. & Maule, J. P. (1960). The indigenous livestock of eastern and southern Africa. T. C. no. 14. Commonwealth Agricultural Bureaux, Farnham Royal, Bucks., England.Google Scholar
Mcleroy, G. B. (1961). The sheep of the Sudan. (2) Ecotypes and tribal breeds. Sudan J. vet. Sci. 2, 101–65.Google Scholar
Meyer, J. H. (1962). Removing sources of error in lamb feeding experiments. J. Anim. Sci. 21, 127–31.CrossRefGoogle Scholar
Osman, A. H. & Bradford, G. E. (1967). Genotype-environment interaction and compensatory growth in sheep. J. Anim. Sci. 26, 1239–43.CrossRefGoogle ScholarPubMed
Osman, A. H. & El Shafie, S. A. (1967). Carcass characteristics of Sudan Desert sheep. Sudan J. vet. Sci. 8, 115–19.Google Scholar
Osman, A. H., El Shafie, S. A. & Mukhtar, A. M. S. (1968). Feedlot performance of Sudan Desert sheep. Rate, efficiency and economy of gain. Sudan J. vet. Sci. 9, 306–18.Google Scholar
Palsson, H. (1939). Meat qualities in the sheep with special reference to Scottish breeds and crosses. J. agric. Sci., Camb. 29, 544–626.CrossRefGoogle Scholar
Palsson, H. & Verges, J. B. (1952). Effects of the plane of nutrition on growth and the development of carcass quality in lambs. Part II. Effects on lambs of 30 lb. carcass weight. J. agric. Sci., Camb. 42, 93–149.CrossRefGoogle Scholar
Spurlock, G. M., Bradford, G. E. & Wheat, J. D. (1966). Live animal and carcass measures for the prediction of carcass traits in lambs. J. Anim. Sci. 25, 454–9.CrossRefGoogle Scholar
Timon, J. M. & Bichard, M. (1965). Quantitative estimates of lamb carcass composition. I. Sample joints. Anim. Prod. 7, 173–81.Google Scholar