Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-27T19:20:22.937Z Has data issue: false hasContentIssue false
  • English
  • Français

A note on the voluntary food consumption and the sodium-potassium ratio of sheep after shearing

Published online by Cambridge University Press:  02 September 2010

J. H. Ternouth  and
A. W. Beattie
J. H. Ternouth
Affiliation:
Department of Animal Husbandry, Veterinary School, University of Queensland, St Lucia, Queensland
A. W. Beattie
Affiliation:
Department of Animal Husbandry, Veterinary School, University of Queensland, St Lucia, Queensland
Get access

Summary

The daily voluntary food consumption (VFC), water intake and urinary excretion of water, sodium and potassium of eight sheep were studied before and after shearing. The extracellular volume of each sheep was measured twice before and three times after shearing. VFC was significantly higher for the first 3 weeks after shearing than for the 3 weeks immediately before shearing. There was a decreased excretion of Na in the urine and a smaller Na/K ratio for the first 2 weeks after shearing, although the extracellular volume was not significantly increased until 4 weeks after shearing. Within, but not between, the 3-week periods before and after shearing, there was a close linear relationship between VFC and water intake, the latter being significantly less for the same VFC after shearing. During weeks 4 and 5 after shearing, there was an increased loss of Na in the urine and a higher Na/K ratio, and the linear relationship between VFC and water intake was intermediate between that shown before and after shearing. The VFC of the sheep before shearing and in week 5 after shearing were similar.

Type
Research Article
Information
Animal Production , Volume 12 , Issue 2 , May 1970 , pp. 343 - 346
Copyright
Copyright © British Society of Animal Science 1970

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

Blaxter, K. L., Graham, N. McC. and Wainman, F. W. 1959. Environmental temperature, energy metabolism and heat regulation in sheep. III. The metabolism and thermal exchanges of sheep with fleeces. J. agric. Sci., Camb. 52: 41–49.CrossRefGoogle Scholar
Dobson, A., Scott, D. and Bruce, J. B. 1966. Changes in sodium requirement of sheep associated with changes in diet. Q. Jl exp. Physiol. 51: 311–323.Google Scholar
MacFarlane, W. V., Howard, B. and Morris, R. J. H. 1966. Water metabolism of Merino sheep shorn during summer. Aust. J. agric. Res. 17: 219–225.CrossRefGoogle Scholar
Morris, R. J. H., Howard, B. and MacFarlane, W. V. 1962. Interaction of nutrition and air temperature with water metabolism of Merino wethers shorn in winter. Aust. J. agric. Res. 13: 320–324.Google Scholar
Ternouth, J. H. 1968. Changes in the thiosulphate space and some constituents of the blood of sheep after feeding. Res. vet. Sci. 9: 345–349.CrossRefGoogle ScholarPubMed
Webster, M. E. D. and Lynch, J. J. 1966. Some physiological and behavioural consequences of shearing. Proc. Aust. Soc. Anim. Prod. 6: 234–239.Google Scholar
Wheeler, J. L., Reardon, T. F. and Lambourne, L. J. 1963. The effect of pasture availability and shearing stress on the herbage intake of grazing sheep. Aust. J. agric. Res. 14: 364–372.CrossRefGoogle Scholar
Wodzicka-Tomaszewska, M. 1963. The effect of shearing upon the appetite of sheep. N.Z. Jl agric. Res. 6: 440–447.Google Scholar