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Growth in sheep. I. The chemical composition of the body

Published online by Cambridge University Press:  27 March 2009

T. W. Searle ,
N. McC. Graham  and
M. O'Callaghan
T. W. Searle
Affiliation:
C.S.I.R.O., Division of Animal Physiology, Ian Clunies Ross Animal Research Laboratory, Prospect, N.S.W., Australia*
N. McC. Graham
Affiliation:
C.S.I.R.O., Division of Animal Physiology, Ian Clunies Ross Animal Research Laboratory, Prospect, N.S.W., Australia*
M. O'Callaghan
Affiliation:
Division of Mathematical Statistics, C.S.I.R.O., Newtown, N.S.W., Australia2042
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Summary

Fifteen sheep were fed ad libitum from 2 days to 27 months of age, and another 15 sheep were each fed exactly half the average amount consumed by the first group, age for age. The body composition of each sheep (water, fat, protein, energy) was estimated from tritiated water space on 13 occasions during this period.

To describe the course of growth in individual sheep in terms of the relationships between the various body components and body weight, a model was set up in which 4 phases of growth were distinguished, viz. the milk-feeding phase, the period of rumen development, and a prefattening followed by a fattening ruminant phase. Each phase was represented by a linear equation.

Except for phase 1, mean composition within each phase differed significantly between well-fed animals and those which had been given a restricted diet. Individual animals differed in the body weight at which the final phase commenced; the average weight was ca. 31 kg. Fat storage was zero or negative during the main period of rumen development; otherwise the fat and therefore energy content of weight gain increased from phase to phase. The protein and water content of gain was high in phases 1 and 2 and decreased subsequently.

Calculations based on data in the literature indicated that, in phase 4, the composition of weight loss was the same as that of weight gain. It is also suggested that the body weight at which this fattening phase commences is related to mature weight, with animals of large ultimate size starting to fatten at heavier body weights than those of small ultimate size.

The application of the results to the determination of nutrient requirements is discussed.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 79 , Issue 3 , December 1972 , pp. 371 - 382
Copyright
Copyright © Cambridge University Press 1972

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References

REFERENCES

Agricultural Research Council, London (1965). The Nutrient Requirements of Farm Livestock, No. 2. Ruminants. London: Agric. Res. Council.Google Scholar
Alexander, G. (1962). Energy metabolism in the starved new-born lamb. Aust. J. agric. Res. 13, 144–64.CrossRefGoogle Scholar
Butterfield, R. M. & Berg, R. T. (1966). A nutritional effect on relative growth of muscles. Proc. Aust. Soc. Anim. Prod. 6, 298–304.Google Scholar
Bull, L. S. (1969). Effect of acetic acid on energy metabolism and body composition of sheep. Ph.D. Thesis, Cornell University, Ithaca, N.Y.Google Scholar
Callow, E. H. (1948). Comparative studies of meat. II. The changes in the carcass during growth and fattening and their relation to the chemical composition of the fatty and muscular tissues. J. agric. Sci., Camb. 38, 174–99.CrossRefGoogle Scholar
Cannon, D. J. & Bath, J. G. (1969). Effect of age at first joining on lifetime production by Border Leicester × Merino ewes. Aust. J. Exp. Agric. Anim. Husb. 9, 477–81.CrossRefGoogle Scholar
Cheek, D. B. (1968). Human Growth. Philadelphia: Lea and Febiger.Google Scholar
Ellis, N. R. & Hawkins, O. G. (1925). Soft pork studies. I. Formation of fat in the pig on a ration moderately low in fat. J. Biol. Ohem. 66,, 101–22.CrossRefGoogle Scholar
Enesco, M. & Leblond, C. P. (1962). Increase in cell number as a factor in the growth of the organs and tissues of the young male rat. J. Emhryol. Exptl Morphol. 10, 530–62.Google Scholar
Graham, N. McC. (1967). The metabolic rate of fasting sheep in relation to total and lean body weight, and the estimation of maintenance requirements. Aust. J. agric. Res. 18, 127–36.Google Scholar
Graham, N. McC. (1970). Growth in sheep. Publ. Eur. Ass. Anim. Prod. 13, 105–8.Google Scholar
Graham, N. McC. & Searle, T. W. (1972). Growth in sheep. II. Efficiency of energy and nitrogen utilization from birth to 2 years. J. agric. Sci., Camb. 79, 383–9.CrossRefGoogle Scholar
Haecker, T. L. (1920). Investigations in beef production. Bull. Min. Agric. Exp. Stn. No. 193.Google Scholar
Hirsch, J. & Han, P. W. (1969). Cellu∥arity of rat adipose tissue: effects of growth, starvation and obesity. J. Lipid Res. 10, 77–82.CrossRefGoogle ScholarPubMed
Huxley, J. S. (1932). Problems of Relative Growth. London: Methuen and Co.Google Scholar
Israelsohn, W. J. (1960). Human Growth, vol. III. Ed. Tanner, J. M.. London: Pergamon Press.Google Scholar
Joubert, D. M. (1956). An analysis of factors influencing post-natal growth and development of the muscle fibre. J. agric. Sci., Camb. 47, 59–102.CrossRefGoogle Scholar
Kavanagh, A. J. & Richards, O. W. (1942). Mathematical analysis of the relative growth of organisms. Proc. Rochester Acad. Sci. 8, 150–74.Google Scholar
Kotarbinska, M. (1969). Badania nad przemiana, energii u rosnących sẃiń. Publ. Warsaw Inst. Anim. Physiol. No. 239.Google Scholar
Langlands, J. P. & Sutherland, H. A. M. (1969). An estimate of the nutrients utilized for live-weight gain by Merino sheep. Br. J. Nutr. 23, 603–9.CrossRefGoogle ScholarPubMed
Mason, I. L. (1971). Comparative beef performance of the large cattle breeds of Western Europe. Anim. Breed. Abstr. 39, 1–29.Google Scholar
O'Callaghan, M. (1972). Piecewise parallel linear regression. O.S.I.R.O. Div. Math. Stats. Tech. Paper (submitted).Google Scholar
Páalsson, H. & Vergés, J. B. (1952). Effects of the plane of nutrition on growth and the development of carcass quality in lambs. J. agric. Sci., Camb. 42, 1–149.CrossRefGoogle Scholar
Panaretto, B. A. (1964). Body composition in vivo. VI. The composition of ewes during prolonged undernutrition. Aust. J. agric. Res. 15, 771–87.CrossRefGoogle Scholar
Rao, C. R. (1965). Linear Statistical Inference and its Application, p. 237. New York: Wiley.Google Scholar
Reid, J. T. et al. (1968). Some peculiarities in the body composition of animals. In Body Composition in Animals and Man, p. 19. Washington: Nat. Acad. Sci.Google Scholar
Searle, T. W. (1970 a). Body composition in lambs and young sheep and its prediction in vivo from tritiated water space and body weight. J. agric. Sci., Camb. 74, 357–62.CrossRefGoogle Scholar
Searle, T. W. (1970 b). Prediction of body composition of sheep from tritiated water space and body weight – tests of published equations. J. agric. Sci., Camb. 75, 497–500.CrossRefGoogle Scholar
Searle, T. W. & Graham, N. McC. (1972). Comparisons of body composition and energy utilization between Merino and fixed halfbred (Border Leicester × Merino) wethers. Aust. J. agric. Res. 23, 339–46.CrossRefGoogle Scholar
Seebeck, R. M. (1968). Developmental studies of body composition. Anim. Breed. Abstr. 36, 167–81.Google Scholar
Steel, R. G. D. & Torrie, J. H. (1960). Principles and Procedures of Statistics. New York: McGraw-Hill.Google Scholar
Thomson, D. J. (1965). Energy retention in lambs as measured by the comparative slaughter technique. Publ. Eur. Ass. Anim. Prod. 11, 319–26.Google Scholar
Tulloh, N. M. (1963). The carcase compositions of sheep, cattle, and pigs as functions of body weight. In Carcase Composition and Appraisal of Meal Animals, p. 5–1. Melbourne: C.S.I.R.O.Google Scholar
Walker, D. M. & Jagusch, K. T. (1969). Utilization of the metabolizable energy of cow's milk by the lamb. Publ. Eur. Ass. Anim. Prod. 12, 187–93.Google Scholar
Wallace, L. R. (1948). The growth of lambs before and after birth in relation to nutrition. J. agric. Sci., Camb. 38, 93–153.CrossRefGoogle Scholar
Wardrop, I. D. & Coombe, J. B. (1961). The development of rumen function in the lamb. Aust. J. agric. Res. 12, 661–80.CrossRefGoogle Scholar
Watson, R. H. & Gamble, L. C. (1961). Puberty in the Merino ewe with special reference to the influence of season of birth upon its occurrence. Aust. J. agric. Res. 12, 124–38.CrossRefGoogle Scholar
Watson, R. H., Sapsford, C. S. & McCance, I. (1956). The development of the testis, epididymis and penis in the young Merino ram. Aust. J. agric. Res. 7, 574–90.CrossRefGoogle Scholar
Wood, A. J. & Groves, T. D. D. (1965). Body composition studies on the suckling pig. I. Moisture, chemical fat, total protein, and total ash in relation to age and body weight. Can. J. Anim. Sci. 45, 8–13.CrossRefGoogle Scholar