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Heat tolerance in dehydrated steers

Published online by Cambridge University Press:  27 March 2009

W. Bianca
W. Bianca
Affiliation:
Department of Physiology, The Hannah Dairy Research Institute, Ayr, Scotland
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Extract

Six steers kept in an environment of 15°C. were deprived of water for four consecutive days. This treatment, by depressing appetite, caused a reduction in voluntary hay intake to one-quarter of its normal level and a decrease in body weight by 10%.

In spite of this reduction in feed intake, which must have been accompanied by a fall in metabolic heat production, the animals were less able to tolerate heat than when they were normally watered: during 4 hr. exposures to temperatures of 40.0°C. dry bulb and 32.5°C. wet bulb the waterdepleted animals showed higher values of rectal and skin temperature. This was associated with a slower initial rise and lower final values of respiratory rate (130 versus 155 respirations/min.).

Type
Research Article
Information
The Journal of Agricultural Science , Volume 66 , Issue 1 , February 1966 , pp. 57 - 60
Copyright
Copyright © Cambridge University Press 1966

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References

REFERENCES

Bianca, W. (1965). Res. Vet. Sci. 6, 33–7.CrossRefGoogle Scholar
Bianca, W., Findlay, J. D. & McLean, J. A. (1965). Res. Vet. Sci. 6, 38–55.CrossRefGoogle Scholar
Dontas, S. (1939). Arch. ges. Physiol. 241, 612–29.CrossRefGoogle Scholar
Ellis, F. P., Ferres, H. M. & Lind, A. R. (1954). J. Physiol. 125, 61–62p.Google Scholar
Findlay, J. D., McLean, J. A. & Bennet, R. D. (1959). Heat. Vent. Engr. 09–10 1–6.Google Scholar
Grande, F., Taylor, H. L., Anderson, J. T., Buskirk, E. & Keys, E. A. (1958). J. Appl. Physiol. 12, 202–10.CrossRefGoogle Scholar
Leithead, C. S. & Pallister, M. A. (1960). Lancet, 16 07, 114–17.CrossRefGoogle Scholar
Nisbet, W. (1956). J. Sci. Instrum. 33, 154–8.CrossRefGoogle Scholar
Rietschel, H. & Beck, E. (1928). Deutsche medizin. Wochenschrift, 54, 1283–4.CrossRefGoogle Scholar
Schmidt-Nielsen, B., Schmidt-Nielsen, K., Houpt, T. R. & Jarnum, S. A. (1956). Amer. J. Physiol. 185, 185–94.CrossRefGoogle Scholar