Hostname: page-component-848d4c4894-x24gv Total loading time: 0 Render date: 2024-05-09T08:21:57.901Z Has data issue: false hasContentIssue false
  • English
  • Français

Pre- and postnatal study of the carcass growth of sheep. 2. The cellular growth of adipose tissues

Published online by Cambridge University Press:  02 September 2010

T. E. Broad ,
A. S. Davies  and
G. Y. Tan
T. E. Broad
Affiliation:
Applied Biochemistry Division, Department of Scientific and Industrial Research, Palmerston North, New Zealand
A. S. Davies
Affiliation:
Department of Anatomy and Physiology, Massey University, Palmerston North, New Zealand
G. Y. Tan
Affiliation:
Department of Anatomy and Physiology, Massey University, Palmerston North, New Zealand
Get access

Abstract

The diameter of adipocytes from subcutaneous, intermuscular and internal cavity fat depots of 5 pre- and 14 postnatal Romney female sheep was measured, the volume calculated, and the number per depot computed from the weight of triglyceride in the depots.

The rates of increase of adipocyte volume relative to the increase in weight of total side adipose tissue, and of the fat depots and their chemical components, were calculated using linear regression analyses of the natural logarithmic transformed data. These logarithmic regression equations were used to estimate the volume of adipocytes in sheep at different stages of development. The total numbers of adipocytes at each stage of growth were estimated using linear double logarithmic regressions of adipocyte number on carcass weight.

The growth of total adipose tissue and of each of the fat depots occurred mainly by an increase in the adipocyte volume, which increased over 70-fold from 120 days gestation to 5 years of age. The increase in adipocyte volume during growth occurred at similar rates in all of the fat depots and no significant differences between the volumes of adipocytes from the fat depots were found within sheep of similar carcass weight. During the same growth period the total number of adipocytes increased about 6-fold. Differences in the relative rates of growth of the fat depots were attributed to cellular multiplication rather than to cellular enlargement.

Type
Research Article
Information
Animal Production , Volume 31 , Issue 1 , August 1980 , pp. 73 - 79
Copyright
Copyright © British Society of Animal Science 1980

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

Alexander, G. and Bell, A. W. 1975. Quantity an d calculated oxygen consumption during summit metabolism of brown adipose tissue in newborn lambs. Biol.Neonate 16: 214–220.Google Scholar
Broad, T. E. and Davies, A. S. 1980. Pre- and postnatal study of the carcass growth of sheep. 1. Growth of dissectable fat and its chemical components. Anim. Prod. 31: 63–71.Google Scholar
Burton, J. H., Anderson, M. and Reid, J. T. 1974. Some biological aspects of partial starvation. The effect of weight loss and regrowth on body composition in sheep. Br. J. Nutr. 32:515–527.Google Scholar
De Luca, H. F. and Cohen, P. P. 1964. Suspending media for animal tissues. In Manometric Techniques (ed. Umbreit, W. W., Burris, R. H. and Stauffer, J. F.), 4th ed., pp. 131 133. Burgess Publishing Co, Minneapolis, Minn.Google Scholar
Greenwood, M. R. C. and Hirsch, J. 1974. Postnatal development of adipocyte cellularity in the normal rat. J Lipid Res. 15: 474–483.Google Scholar
Haugebak, C. D., Hedrick, H. B. and Asplund, J. M. 1974. Adipose tissue accumulation and cellularity in growing and fattening lambs. J. Anim. Sci. 39: 1016–1025.Google Scholar
Hood, R. L. and Thornton, R. F. 1979. The cellularity of ovine adipose tissue. Aust. J. agric. Res. 30: 153–161.CrossRefGoogle Scholar
Lorch, E. and Rentsch, G. 1969. A simple method for staining and counting isolated adipose tissue fat cells. Diabetologica 5: 356–357.Google Scholar
Sjostrom, L., Bjorntorp, P. and Vrana, J. 1971. Microscopic fat cell size measurements on frozen-cut adipose tissue in comparison with automatic determinations of osmium-fixed fat cells. J. Lipid Res. 12: 521–530.Google Scholar
Thornton, R. F., Hood, R. L., Jones, P. N. and Re, V. M. 1979. Compensatory growth in sheep. Aust. J. agric. Res. 30: 135–151.CrossRefGoogle Scholar
Wensvoort, P. 1968. Adipose tissue in calves and lambs. Pathologia vet. 5: 270–281.Google Scholar