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Acclimatization of calves to a hot dry environment

Published online by Cambridge University Press:  27 March 2009

W. Bianca
W. Bianca
Affiliation:
The Hannah Dairy Research Institute, Kirkhill, Ayr
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Extract

1. Three calves were individually exposed in a climatic room to an environment of 45° C. dry-bulb and 28° C. wet-bulb temperature for 21 successive days up to 5 hr. each day.

2. In the 21-day period, mostly during the first half of it, the following changes in the physiological reactions of the animals were observed: progressive reductions in rectal temperature, in heart rate and in respiratory rate with a change of breathing from a laboured to a less laboured type.

3. It was suggested that a decrease in metabolic heat production might play a part in the observed acclimatization.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 52 , Issue 3 , June 1959 , pp. 296 - 304
Copyright
Copyright © Cambridge University Press 1959

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References

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