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Studies on certain aspects of sheep and goat husbandry. V. Effect of season on respiration and pulse rate of Corriedale and Bikaneri sheep and Jamnapari goat



Studies on certain aspects of sheep and goat husbandry. V. Effect of season on respiration and pulse rate of Corriedale and Bikaneri sheep and Jamnapari goat



Indian J Veterinary Sci Anim Husb 33(3): 128-141



The influence of climatic elements (temperature and relative humidity) on the respiration and pulse rate of Corriedale and Bikaneri sheep and Jamnapari goat during different seasons was studied. The intervening period between the onset of rainy season and the period characterized by continuous and heavy rainfall was very hot and humid. Similar conditions prevailed in autumn. During these periods the respiration rate of the animals became quite high; on the other hand, it was low during the period of continuous rain. Periods characterized by high temperature and high humidity were found to be even more trying for the sheep and goat than the periods characterized by high temperature only. The respiration rate of the Corriedale sheep was always higher than that of the other groups of animals. Because of their low heat tolerance they had to be maintained in an artificially cooled room during the summer. Between the Bikaneri sheep and Jamnapari goat the respiration rate of the former was higher, but the differences in their heat tolerance were not significant. The environmental temperature was found to be the major factor for causing variations in the respiration rate of the Bikaneri sheep and Jamnapari goat. The effects of the two climatic elements on the respiration rate of male and female animals of all the groups were similar. The Bikaneri sheep and Jamnapari goat are highly heat tolerant animals. This is indicated by their grazing behavior during the height of summer, when temperature rises to about 118[degree]F. They moved about continuously without increasing the respiratory rate abnormally. Between Bikaneri sheep and Jamnapari goat, respiration was influenced more in the former by high humidity. The partial correlation between environmental temperature and respiration of the Bikaneri sheep keeping humidity constant was 0.622 and that between relative humidity and respiration keeping environmental temperature constant was 0.379. The respective figures for Jamnapari goat were 0.765 and 0.227. The multiple correlations for Bikaneri sheep and Jamnapari goat were 0.726 and 0.800 respectively. While the fluctuations in the pulse rate of the Bikaneri sheep were not attributable to the influence of temperature or humidity; in the Jamnapari goat pulse rate was influenced by the relative humidity. The differences between the pulse rates of the male and female of all the groups were generally significant.

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