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Changes in body composition relative to weight and maturity of Australian Dorset Horn rams and wethers 4. Adipocyte volume and number in dissected fat partitions

Published online by Cambridge University Press:  02 September 2010

J. M. Thompson  and
R. M. Butterfield
J. M. Thompson
Affiliation:
Department of Animal Science, University of New England, Armidale, NSW, 2351, Australia
R. M. Butterfield
Affiliation:
Department of Veterinary Anatomy, Sydney University, NSW, Australia
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Abstract

The effect of castration on the cellular characteristics of dissected fat partitions was examined in 20 Dorset Horn rams and 20 Dorset Horn wethers. Cellular characteristics of dissected carcass (subcutaneous and intermuscular partitions) and non-carcass (kidney fat, omental and mesenteric partitions) fat partitions were examined in 13 mature animals, and the rate of change in adipocyte volume relative to the change in chemical-fat weight in that partition, examined in 27 immature animals.

Mature wethers had a greater concentration of chemical fat in the subcutaneous fat partition than mature rams (917 v. 885 g/kg, respectively). This, in combination with a greater weight of dissected subcutaneous fat, resulted in a greater weight of chemical fat in the subcutaneous partition of wethers compared with rams. Mature wethers had larger adipocytes than mature rams in all dissected fat partitions, with the largest increase in the subcutaneous and omental fat partitions. The increased adipocyte volume in the dissected fat partitions in mature wethers resulted in a smaller total estimated number of adipocytes in all carcass and non-carcass fat partitions compared with mature rams.

Standardized allometric coefficients for adipocyte volume relative to chemical-fat weight in that partition showed that increases in chemical-fat weight were due to a combination of hypertrophy and hyperplasia. In the omental and kidney fat partitions, hypertrophy contributed more to the increase in chemical-fat weight in wethers compared with rams.

Type
Research Article
Information
Animal Production , Volume 46 , Issue 3 , June 1988 , pp. 387 - 393
Copyright
Copyright © British Society of Animal Science 1988

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References

REFERENCES

Allen, C. E., Beitz, D. C., Cramer, D. A. and Kauffman, R. G. 1976. Biology of fat in meat animals. North Central Regional Research Publication No. 234. University of Wisconsin, Madison, USA.Google Scholar
Broad, T. E., Davies, A. S. and Tan, G. Y. 1980. Pre- and postnatal study of the carcass growth of sheep. 2. The cellular growth of adipose tissues. Animal Production 31: 73–79.Google Scholar
Butterfield, R. M., Griffiths, D. A., Thompson, J. M., Zamora, J. and James, A. M. 1983. Changes in body composition relative to weight and maturity in large and small strains of Australian Merino rams. 1. Muscle, bone and fat. Animal Production 36: 29–37.Google Scholar
Butterfield, R. M., Thompson, J. M. and Reddacliff, K. J. 1985. Changes in body composition relative to weight and maturity of Australian Dorset Horn rams and wethers. 3. Fat partitioning. Animal Production 40: 129–134.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. Carcass muscle, fat and bone and body organs. Animal Production 39: 251–258.Google Scholar
Cianzio, D. S., Topel, D. G., Whitehurst, G. G., Beitz, D. C. and Self, H. L. 1985. Adipose tissue growth and cellularity: changes in bovine adipocyte size and number. Journal of Animal Sciences 60: 970–976.CrossRefGoogle ScholarPubMed
Hirsch, J. and Gallian, E. 1968. Methods for determination of adipose cell size in man and animals. Journal of Lipid Research 9: 110–119.CrossRefGoogle Scholar
Hood, R. L. 1982. Relationships among growth, adipose cell size, and lipid metabolism in ruminant adipose tissue. Federation Proceedings 41: 2555–2561.Google ScholarPubMed
Hood, R. L. and Allen, C. E. 1973. Cellularity of bovine adipose tissue. Journal of Lipid Research 14: 605–610,CrossRefGoogle ScholarPubMed
Hood, R. L. and Thornton, R. F. 1979. The cellularity of ovine adipose tissue. Australian Journal of Agricultural Research 30: 153–161.CrossRefGoogle Scholar
Jones, S. D. M., Price, M. A. and Berg, R. T. 1981. Accumulation of lipid in rib cuts from bull and heifer carcasses of two breeds. Canadian Journal of Animal Science 61: 23–26.CrossRefGoogle Scholar
Krotkiewski, M. 1976. The effects of estrogens on regional adipose tissue cellularity in the rat. Acta Physiologica Scandinavica 96: 128–133.CrossRefGoogle ScholarPubMed
Krotkiewski, M. and Bjorntorp, P. 1976. The effects of progestrone and of insulin administration on regional adipose tissue cellularity in the rat. Acta Physiologica Scandinavica 96: 122–127.CrossRefGoogle Scholar
Robelin, J. 1981. Cellularity of bovine adipose tissues: developmental changes from 15 to 65 per cent of mature weight. Journal of Lipid Research 22: 452–457.CrossRefGoogle Scholar
Taylor, St C. S. 1978. Methods of quantifying growth and development. In Patterns of Growth and Development in Cattle (ed. Boer, H. De and Martin, J.), pp. 625–638. Martinus Nijhoff, The Hague.Google Scholar
Taylor, St C. S. 1980. Genetically standardized growth equations. Animal Production 30: 167–175.Google Scholar
Thompson, J. M., Butterfield, R. M. and Perry, D. 1987. Food intake, growth and body composition in Australian Merino sheep selected for high and low weaning weight. 4. Partitioning of dissected and chemical fat in the body. Animal Production 45: 49–60.Google Scholar
Thompson, J. M., Butterfield, R. M. and Reddacliff, K. J. 1988. Food intake, growth and body composition in Australian Merino sheep selected for high and low weaning weight. 5. Adipocyte volume and number in the dissected fat partitions. Animal Production 46: 395–402.CrossRefGoogle Scholar
Truscott, T. G., Wood, J. D. and Denny, H. R. 1983. Fat deposition in Hereford and Friesian steers. 2. Cellular development of the major fat depots. Journal of Agricultural Science, Cambridge: 100: 271–276.CrossRefGoogle Scholar
Usher, C. D., Green, C. J. and Smith, C. A. 1973. The rapid determination of fat in various foods using the Foss-let density apparatus. Journal of Food Technology 8: 429–437.CrossRefGoogle Scholar