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By R. A. Eigenberg and J. A. Nienaber


ABSTRACT. Respiration rates were included as one measure in a study investigating bioenergetic responses of growing–finishing swine to heat challenges. Respiration rate monitors were designed around a commercially available acoustic transducer and a small battery–powered microcomputer. The monitors were designed, fabricated, and tested to provide continuous records as a basis for evaluating stress responses associated with environmental conditions. Representative data from a calorimetry study indicated the association of respiration rate and ambient temperature (P < 0.01). Data reduction and analysis are also discussed, based on representative samples of collected records. Keywords. Bioenergetic, Microcomputer, Respiration rate monitor, Swine, Transducer. Respiratory heat transfer is an important method of heat loss for most mammals (homeotherms) over a broad range of environmental conditions (Ingram and Mount, 1975). Respiration rate (RR) provides a visually observable measure of an animal’s response to thermal conditions. Respiration rate can be an important physiological parameter when used with other information, such as ambient temperature (Ta), humidity

Year: 2009
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