羊の皮膚表面における蒸泄量について

概要

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Two Corriedale ewes, 14.5-month-old, were subjected to a rising temperature regime over the range of 10 to 35° at relative humidity 60-70%.Before and after shearing, observations were made on respiration rates and rectal temperatures and also perspiration rates and temperatures on the skin surface of mid-side.Perspiration rates before shearing were about two times as large as those after shearing. Perspiration rates increased with rising temperature and under the hot conditions a sharp rise of perspiration rates occurred at environmental temperature of 30° irrespective of before or after shearing.At the environmental temperature of 25-35°, perspiration rates had a highly significant correlation with skin temperature before and after shearing and the overall correlation also highly significant. No significant differences were found between the linear regression coefficients of perspiration rates to skin temperature before and after shearing.Concerning to the cooling effect by perspiration, it was suggested that the evaporation from the skin is less efficient in unshorn sheep than in shorn ones.
公益社団法人日本畜産学会の論文