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Thermal adjustments of steers (Bos taurus) to abrupt changes in environmental temperature

Published online by Cambridge University Press:  27 March 2009

J. A. McLean ,
A. J. Downie ,
C. D. R. Jones ,
D. P. Stombaugh  and
C. A. Glasbey
J. A. McLean
Affiliation:
Hannah Research Institute, Ayr, Scotland
A. J. Downie
Affiliation:
Hannah Research Institute, Ayr, Scotland
C. D. R. Jones
Affiliation:
Hannah Research Institute, Ayr, Scotland
D. P. Stombaugh
Affiliation:
Hannah Research Institute, Ayr, Scotland
C. A. Glasbey
Affiliation:
A.R.C. Unit of Statistics, University of Edinburgh, Edinburgh, Scotland
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Summary

Body heat storage changes of cattle were measured by means of simultaneous direct and indirect calorimetry and by thermometry in an environment that alternated in temperature between 12 and 25 °C. When the calorimeter temperature was increased deep body temperature (Tc) increased by approximately 0–5 °C, mean surface temperature (Ts) by 3 °C and mean body temperature (determined from calorimetry, Tb) by 1 °C, but these increases were not fully sustained during the next 24 h. Changes in the three temperatures were related by the equation: δTb = αδTc+(1-α) δTs where a was found to be 0·89±0·027 (S.E.).

Type
Research Article
Information
The Journal of Agricultural Science , Volume 100 , Issue 2 , April 1983 , pp. 305 - 314
Copyright
Copyright © Cambridge University Press 1983

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