author(s)
Asha Lata Murmu, RK Verma, Gloria Tigga, Shiv Kumar Yadav, Sasmita Barik, Rakesh Kumar and Sanjay Kumar

abstract
Despite having well-developed mechanisms of thermoregulation, animal do not maintain strict homeothermy under extreme climatic condition. Harsh environments constitute stressful conditions to animals raised in extreme climatic areas, and as a result, animals develop various adaptive mechanisms that enable them to survive under conditions of extreme heat or extreme cold. The study entitled, “Effect of Meteorological variables on Physiological parameters in Black Bengal Goat” was conducted on twelve adult healthy Black Bengal Goats with the objective to determine the seasonal variations in different physiological responses. Twelve Black Bengal does were investigated for their physiological profiles during autumn(Oct to Nov) and winter (Dec to Jan) seasons. All Physiological parameters such as rectal temperature, respiration rate and heart rate measured daily at 6 A.M. and 3 P.M. throughout the study period. Meteorological parameters like dry bulb temperature and relative humidity were recorded daily for two times at 6 am and 3 pm for estimation of THI throughout the study period. In addition to that the meteorological data for last one year was also collected for estimation of THI. In the present study, the mean THI found during autumn and winter season was 70.45±0.60 and 57.58±0.91 respectively while the mean THI for last one year was 72.09±0.38 during autumn and 62.14±0.28 during winter season. During autumn season, the mean rectal temperature (⁰F), respiration rate (breaths/min.) and heart rate (beats/min.) were 101.17±0.19, 25.50±0.43and 69.45±1.51 respectively. During winter season, the mean rectal temperature, respiration rate and heart rate were 98.67±0.29, 22.34±0.21and 67.55±0.88, respectively. Significant (P<0.05) differences were found in between day and season (autumn and winter) for all the physiological parameters during the experimental period. These physiological parameters were directly proportional to the THI.