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Physiological response of swine to cycling environmental conditions

Published online by Cambridge University Press:  02 September 2010

T. E. Bond ,
C. F. Kelly  and
H. Heitman Jr
T. E. Bond
Affiliation:
U.S. Department of Agriculture, Davis, California, U.S.A.
C. F. Kelly
Affiliation:
California Agricultural Experiment Station, Berkeley, California, U.S.A.
H. Heitman Jr
Affiliation:
Department of Animal Husbandry, University of California, Davis, California, U.S.A.
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Extract

Rectal and surface temperatures, and respiration and pulse rates, were obtained for groups of Duroc pigs that were exposed to air temperatures that varied sinusoidally over a 24-hour period. Two groups averaging 37 and 108 kg were exposed to a constant temperature of 21·1°C and then to temperatures that cycled about a mean of 21·1°C (15·6–26·7°C, 10·0–32·2°C, and 4·4–37·8°C). For a third group averaging 53 kg, the minimum was always near 21·1°C, and the maximum air temperature of the cycle was 33·2, 42·5 or 48·8°C.

The response of rectal and surface temperatures, and pulse and respiration rates, to the various 24-hour cycling air temperatures are discussed and com-pared with inherent daily fluctuations in these responses that are present even when there is no variation in air temperature.

Type
Research Article
Information
Animal Production , Volume 9 , Issue 4 , November 1967 , pp. 453 - 462
Copyright
Copyright © British Society of Animal Science 1967

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References

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