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The temperature of the skin surface was measured with a termistor thermometer /Leeds and Northrup/. The studies embraced six halfblood and six primitive horses. The range of skin temperature was from 20.3 to 30.3 degrees C. /halfbloods/ and from 25.3 to 31.3 /primitive horses/. Sites selected on the body surface were divided into thermostabile and thermolabile places. The results were elaborated statistically. The dependence of the temperature of these sites on meteorological factors was indicated. There was however no essential dependence either between the skin temperature and other investigated physiological factors or between the two groups of horses.
The influence of various ranges of dry cooling /average 22,1 mW/cm² - BCD and 60,2 aW/cm² - CD/ on the heat management have been studied in 15 rabbits. They were exposed to various ranges of temperature and air movement. The skin temperature at shorn and not shorn sites and heat flow were measured. The effect of cooling and air movement on skin temperature, thermal gradient and external thermoinsulation were calculated using statistical methods. It has been found that cooling, especially CD, clearly reduced the skin temperature, whereas the influence of air movement on skin temperature has been susceptible of various interpretations. Thermal gradients /skin temperature - air temperature/ increased as the cooling rlsed but their increase was higher at lower values of cooling /BCD/ than at higher values /CD/. The same relationship could be found in case of heat flow. The external insulation was dependet on cooling and at higher cooling values /CD/ it was lower than at lower values of cooling /BCD/. It proves that lower critical temperature for rabbits was exceeded when the experimental factor /CD/ appeared.
The purpose of the study was to determine the degree of interrelationship between the udder surface temperature, heat flux and microclimatic conditions in the cow-shed, and different periods of lactation. A considerable diffe- rentation of udder temperature was found depending on the place of measurement. The highest temperature was found in the milk antrum and the lowest at teats. Udder skin temperature and the magnitude of heat flux from its surface were dependent mainly on air temperature, air velocity and cooling. External udder temperature was the lowest at air temperature ranging from 16.4 to 17.4°C. At the same time heat flux from the udder surface was the highest. Above the temperature range there occurred an increase of skin temperature and the value of heat flux decreased. The highest temperature of the udder was observed at 6-7 months after delivery, although that increase could have been the outcome of seasonal air temperature growth during that period. No marked influence of lactation period on the biothermic indices of the udder was found.
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