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Fasting and maintenance metabolism of sheep

Published online by Cambridge University Press:  27 March 2009

K. L. Blaxter  and
A. W. Boyne
K. L. Blaxter
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB
A. W. Boyne
Affiliation:
Rowett Research Institute, Bucksburn, Aberdeen, AB2 9SB
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Summary

A series of measurements of the heat production of 16 adult sheep made at intervals of not less than 4 weeks when they were given precise amounts of different diets at about the maintenance level of nutrition were analysed statistically. The total number of observations was 365. For some sheep the observations spanned periods of more than 3 years and none spanned less than 1½ years.

There were no time-related trends in the metabolizability of the gross energy of the diet. It was found that the measured heat productions, the heat productions corrected to zero energy retention and the heat productions corrected to zero feed intake (calculated fasting metabolism) were sinusoidal with time. The amplitude of the sine coefficient was about 14% of the mean value, and in some sheep there was in addition a linear secular trend. The phase of the sine function was such that minimal metabolism occurred in midwinter and maximal metabolism in midsummer.

The results suggest that the seasonal variation in voluntary feed intake is associated with a similar seasonal variation in basal metabolic rate. The fact that all animals were given maintenance rations throughout further suggests that the higher metabolism is not due to higher feed intake.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 99 , Issue 3 , December 1982 , pp. 611 - 620
Copyright
Copyright © Cambridge University Press 1982

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References

Agricultural Research Council (1965). The Nutrient Requirements of Farm Livestock. No. 2. Ruminants. London: H.M.S.O.Google Scholar
Agricultural Research Council (1980). The Nutrient Requirements of Ruminant Livestock. Farnham Royal: Commonwealth Agricultural Bureaux.Google Scholar
Blaxter, K. L. (1974). Adjustments of the metabolism of the sheep to confinement. In Energy Metabolism Farm Animals (ed. Menke, K. H., Lantzsch, H.-J. and Reichl, J. R.), pp. 115–118. Stuttgart: Universitat Hohenheim.Google Scholar
Blaxter, K. L. & Boyne, A. W. (1978). The estimation of the nutritive value of feeds as energy sources for ruminants and the derivation of feeding systems. Journal of Agricultural Science, Cambridge 90, 47–68.CrossRefGoogle Scholar
Blaxter, K. L., Fowler, V. R. & Gill, J. C. (1982). A study of the growth of sheep to maturity. Journal of Agricultural Science, Cambridge 98, 405–420.CrossRefGoogle Scholar
Blaxter, K. L., Wainman, F. W. & Davidson, J. L. (1966). The voluntary intake of food by sheep and cattle in relation to their energy requirements for maintenance. Animal Production 8, 75–83.Google Scholar
Brouwer, E. (1965). Report of Sub-Committee on Constants and Factors. In Energy Metabolism (ed. Blaxter, K. L.), pp. 441–443. European Association for Animal Production Publication No. 11. London: Academic Press.Google Scholar
Department of Agriculture and Fisheries for Scotland (1976). Rowett Research Institute Feeding stuffs Evaluation Unit, First Report 1975. Edinburgh: Department of Agriculture and Fisheries for Scotland.Google Scholar
Frisch, J. E. & Vercoe, J. E. (1977). Food intake, eating rate, weight gains, metabolic rate and efficiency of feed utilization in Bos taurus and Bos indicus crossbred cattle. Animal Production 25, 343–358.Google Scholar
Frisch, J. E. & Vergoe, J. E. (1978). Utilizing breed differences in growth of cattle in the tropics. World Animal Review 25, 8–12.Google Scholar
Gordon, J. G. (1964). Effect of time of year on the roughage intake of housed sheep. Nature, London 204, 798–799.CrossRefGoogle ScholarPubMed
Holter, J. B., Urban, W. E. Jr & Hayes, H. H. (1977). Nutrition of northern white-tailed deer throughout the year. Journal of Animal Science 45, 365–376.CrossRefGoogle ScholarPubMed
Kay, R. N. B. (1979). Seasonal changes of appetite in deer and sheep. Agricultural Research Council Research Reviews 5, 13–15.Google Scholar
Kay, R. N. B. & Staines, B. W. (1981). The nutrition of the red deer (Cervus elaphus). Nutrition Abstracts and Reviews Series B 51, 601–622.Google Scholar
MacRae, J. C, Smith, J. S. & White, F. (1982). Effects of gastrointestinal cannulation and jugular vein catheterization on the metabolism of sheep. British Journal of Nutrition 47, 637–644.CrossRefGoogle Scholar
Milne, J. A., MacRae, J. C, Spence, A. M. & Wilson, S. (1978). A comparison of the voluntary intake and digestion of a range of forages at different times of the year by sheep and the red deer (Cervus elaphus). British Journal of Nutrition 40, 347–357.CrossRefGoogle ScholarPubMed
Thompson, C. B., Holter, J. B., Hayes, H. H., Silver, H. & Urban, W. E. Jr (1973). Nutrition of whitetailed deer. 1. Energy requirements of fawns. Journal of Wildlife Management 37, 301–311.CrossRefGoogle Scholar
Ullrev, D. E., Youatt, W. G., Johnson, H. E., Fay, L. D., Schoepke, B. L. & Magee, W. T. (1970). Digestible and metabolizable energy requirements for winter maintenance of Michigan white-tailed does. Journal of Wildlife Management 34, 863–869.CrossRefGoogle Scholar
Vercoe, J. E. & Frisch, J. E. (1982). Animals breeding for improved productivity. In Nutritional Limits to Animal Production from Pasture (ed. Hacker, J. B.), pp. 327–342. Farnham Royal: Commonwealth Agricultural Bureaux.Google Scholar
Wainman, F. W. & Blaxter, K. L. (1969). Further Experience with closed circuit respiration chambers. In Energy Metabolism of Farm Animals (ed. Blaxter, K. L., Kielanowski, J. and Thorbek, G.), pp. 429–433. Newcastle upon Tyne: Oriel Press Ltd.Google Scholar
Wainman, F. W., Dewey, P. J. S. & Boyne, A. W. (1979). Rowett Research Institute Feedingstuffs Evaluation Unit, Second Report 1978. Edinburgh: Department of Agriculture and Fisheries for Scotland.Google Scholar
Wainman, F. W., Dewey, P. J. S. & Boyne, A. W. (1981). Compound feedingstuffs for ruminants. Rowett Research Institute Feedingstuffs Evaluation Unit Third Report 1981. Edinburgh: Department of Agriculture and Fisheries for Scotland.Google Scholar
Webster, A. J. F., Smith, J. S. & Brockway, J. M. (1972). Effects of isolation, confinement and competition for feed on the energy exchanges of growing lambs. Animal Production 15, 189–201.Google Scholar