J. Anim Sci.
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J. Anim Sci. 1971. 32:1103-1106.
© 1971 American Society of Animal Science
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Effect of Environmental Temperature on Physiological Characteristics of Pigs with Fast and Slow Glycolyzing Muscle1

D. G. Topel2, D. E. Galloway3, J. A. Will, W. E. Weirich, R. H. Grummer, R. G. Cassens, R. G. Kauffman and E. J. Briskey

University of Wisconsin, Madison 53705

Abstract

Ten Chester White (slow glycolyzing muscle) and ten Poland China (fast glycolyzing muscle) market weight pigs were consecutively exposed for 2 days to each of four environments (25 C, 6C, 6 to 43 C fluctuating six x daily, and 37 C) in the University of Wisconsin Biotron. Three controls of each breed were exposed to a 25 C environment for the entire 8-day period. No significant differences in blood pH were obtained between breeds or treatments. Blood lactate significantly increased during the death struggle but no significant differences in plasma lactate were obtained for the environmental treatments. Blood glucose decreased when pigs were subjected to cold (6 C) environments. Chester White plasma 17-hydroxycorticosteroid levels increased when subjected to the 6 C, 6 to 43 C and 3 7 C treatments when compared to controls. The Poland China showed a more variable response and no significant differences for plasma 17-OHCS.

Footnotes

1 This investigation was supported, in part, by Public Health Service Research Grant FD-00107 and by a research grant from the American Meat Institute Foundation, Chicago, Illinois. It is published with the approval of the Director of the Wisconsin Agricultural Experiment Station.

2 Present address: Department of Animal Science, Iowa State University, Ames.

3 Present address: U. S. Army Natick Laboratories, Natick, Massachusetts.






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Copyright © 1971 by the American Society of Animal Science.