Environmental physiology and shelter engineering with special reference to domestic animals XXII: Influence of humidity on heat exchange and body temperature regulation in Jersey, Holstein, Brahman and Brown Swiss cattle
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The reactions of cattle, as of other homeotherms, to moderate climatic changes are generally of a compensatory nature tending to maintain or restore thermal balance. Rapid atmospheric changes may, however, temporarily upset this balance, and persistent unfavorable conditions which exceed the limits of physiological compensation may cause deterioration or even death. To gain insight into the mechanisms that distinguish individual cattle or different breeds of cattle in their ability to withstand hot, cold, dry, humid, windy, or sunny climates, data are needed on heat production, heat dissipation, and related activities. Such quantitative data are also essential to the planning of shelters designed to modify unfavorable climatic conditions.