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Changes in body composition relative to weight and maturity of Australian Dorset Horn rams and wethers. 3. Fat partitioning

Published online by Cambridge University Press:  02 September 2010

R. M. Butterfield ,
J. M. Thompson  and
K. J. Reddacliff
R. M. Butterfield
Affiliation:
Department of Veterinary Anatomy, University of Sydney, NSW, 2006, Australia
J. M. Thompson
Affiliation:
Department of Veterinary Anatomy, University of Sydney, NSW, 2006, Australia
K. J. Reddacliff
Affiliation:
Department of Veterinary Anatomy, University of Sydney, NSW, 2006, Australia
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Abstract

The effect of castration on fat partitioning in mature animals and on the maturing patterns for fat depots relative to total body fat was examined using slaughter and dissection data from 20 Dorset Horn rams and 20 Dorset Horn wethers. Animals were slaughtered at 6 kg intervals from 18 kg live weight to maturity. Five rams and eight wethers were classified as mature.

In the mature animals the partitioning of fat differed for the rams and wethers in that the rams had a lower proportion of subcutaneous fat, and higher proportion of intermuscular and mesenteric fat than the wethers. However, the proportions of total carcass dissectible fat (i.e. subcutaneous plus intermuscular fat) and of the total non-carcass depots (i.e. kidney plus channel fat, omental, scrotal and thoracic fat) did not significantly differ between rams and wethers.

The maturity coefficients of individual fat depots of rams and wethers were not significantly different and six of the nine depots were average maturing relative to total body fat. The intermuscular and thoracic fat depots were early maturing (maturity coeffient q= 1·19, 2·26 respectively), and the omental depot was late maturing (q= 0·52).

Comparison of the partitioning of fat in rams and wethers reflected the differences in the mature animals when made at either the mean weight or at the mean stage of maturity, as the maturing patterns of most depots were not greatly different from that of total fat.

Type
Research Article
Information
Animal Production , Volume 40 , Issue 1 , February 1985 , pp. 129 - 134
Copyright
Copyright © British Society of Animal Science 1985

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References

REFERENCES

Berg, R. T., Jones, S. D. M., Price, M. A., Fijkuhara, R., Butterfield, R. M. and Hardin, R. T. 1979. Patterns of carcass fat deposition in heifers, steers and bulls. Can. J. Anim. Sci. 59: 359–366.CrossRefGoogle Scholar
Butler-HOGG, B. W. 1982. Fat partitioning in Clun and Southdown lambs. Anim. Prod. 34: 377 (Abstr.).Google Scholar
Butterfield, R. M. and May, N. D. S. 1966. Muscles of the Ox. University of Queensland Press, Brisbane.Google Scholar
Butterfield, R. M. and Thompson, J. M. 1983. Changes in body composition relative to weight and maturity of large and small strains of Australian Merino rams. 4. Fat depots and bones. Anim. Prod. 37: 423–431.Google Scholar
Butterfield, R. M., Zamora, J., Thompson, J. M., Reddacliff, K. J. and Griffiths, D. A. 1984. Changes in body composition relative to weight and maturity of Australian Dorset Horn rams and wethers. 1. Muscle, fat and bone and body organs. Anim. Prod. 39: 251–258.Google Scholar
Geenty, K. G., Clarke, J. N. and Jury, K. E. 1979. Carcass growth and development of Romney, Corriedale, Dorset, and crossbred sheep. N.Z. Jl agric. Res. 22: 23–32.CrossRefGoogle Scholar
Geenty, K. G. and Jagusch, K. T. 1974. A comparison on the performance of Dorset, Corriedale and Romney sheep during lactation. Proc. N.Z. Soc. Anim. Prod. 34: 14–18.Google Scholar
Jones, S. D. M. 1982. The accumulation and distribution of fat in ewe and ram lambs. Can. J. Anim. Sci. 62: 381–386.CrossRefGoogle Scholar
Jones, S. D. M., Price, M. A. and Berg, R. T. 1980. Fattening patterns in cattle. 1. Fat partition among the depots. Can. J. Anim. Sci. 60: 843–850.CrossRefGoogle Scholar
Kempster, A. J. 1980. Fat partition and distribution in the carcasses of cattle, sheep and pigs: a review. Meat Sci. 5: 83–98.Google Scholar
Kkmpstkr, A. J. and Evans, D. G. 1979. The effects of genotype, sex and feeding regimen on pig carcass development. 2. Tissue weight distribution and fat partition between depots. J. agric. Sci., Camb. 93: 349–358.Google Scholar
Krotkiewski, M. 1976. The effects of estrogens on regional adipose tissue cellularity in the rat. Ada physiol. scand. 96: 128–133.CrossRefGoogle ScholarPubMed
Krotkiewski, M. and Bjorntorp, P. 1976. The effects of progesterone and of insulin administration on regional adipose tissue cellularity in the rat. Ada physiol. scand. 96: 122–127.CrossRefGoogle ScholarPubMed
Palsson, H. 1955. Conformation and body composition. In Progress in the Physiology of Farm Animals. Vol. 2 (ed. Hammond, J.), pp. 430–542. Butterworth, London.Google Scholar
Thompson, J. M., Atkins, K. D. and Gilmour, A. R. 1979. Carcass characteristics of heavyweight crossbred lambs. II. Carcass composition and partitioning of fat. Aust. J. agric. Res. 30: 1207–1214.CrossRefGoogle Scholar
Wood, J. D., MacFie, H. J. H., Pomeroy, R. W. and Twinn, D. J. 1980. Carcass composition in four sheep breeds: the importance of type of breed and stage of maturity. Anim. Prod. 30: 135–152.Google Scholar