J. Anim Sci.
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J. Anim Sci. 1971. 32:926-929.
© 1971 American Society of Animal Science
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Thermoregulatory Responses to Cold Environment by Neonatal Wild and Domestic Piglets1

C. W. Foley2, R. W. Seerley3, W. J. Hansen2 and S. E. Curtis4

University of Georgia, Athens 30601 and University of Missouri, Columbia 39762

Abstract

Thermoregulatory responses to cold by wild piglets (WD) and domestic piglets (DP) were compared. In experiment 1, piglets (W or D; 6 or 54 hr. of age) were subjected to standard thermostability trials. WP were more cold-resistant than DP at both ages. Thermostability improved with age in both strains. In experiment 2, pelage was either removed or left intact as a third factor. As in experiment 1, effects of strain and age on thermostability were significant. Piglets with pelage removed were less thermostable than those with intact pelage. This was particularly true for WP. In experiment 2A, oxygen-consumption rate was measured in piglets from each group in experiment 2. There was essentially no pelage effect on this trait. Oxygen-consumption rate was higher during cold exposure in WP than in DP, especially at 6 hours. It was concluded that the advantage of the WP in cold resistance is due partly to its extra pelage and partly to its more mature metabolic response to cold. It was suggested that further comparative studies with DP and WP might provide knowledge useful in devising practices for reducing neonatal wastage in domestic swine.

Footnotes

1 University of Georgia Institute of Comparative Medicine Publication No. 804, Georgia Agricultural Experiment Station Journal Series No. 879 and Missouri Agricultural Experiment Station Journal Series No. 5774.

2 Physiology Department, University of Georgia, Athens 30601.

3 Animal Science Department, University of Georgia, Athens 30601.

4 Dairy Husbandry Department, University of Missouri, Columbia. Present address: Animal Science Department, University of Illinois, Urbana 61801.






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