Influência de condições ambientais sobre parâmetros fisiológicos em cabras mestiças.

Abstract

This study aimed to evaluate the influence of environmental conditions on physiological parameters in crossbred goats in the period January to March 2012 corresponding to the dry season and from May to July 2012 corresponding to the rainy season. 10 Anglo-Nubian crossbred goats were used, with an average body weight of 60 kg and an average age of 36 months. We used a completely randomized design (DIC) in a 2 x 2 factorial arrangement in two treatments with shadow and without shadow (CS and SS), shift (morning and afternoon) in the dry and rainy periods with ten repetitions. Adaptation period of 14 days. Environmental factors, air temperature, relative humidity, dew point temperature and black globe to calculate the index of the black globe temperature temperature and humidity were obtained every two hours on the microclimate of each treatment, dataloggers. Physiological parameters, rectal temperature, respiratory rate, heart rate, and temperature of the body surface were measured twice a week in shifts morning (9 am) and late (15 h). It was concluded that in a situation of thermal discomfort in the afternoon, the Anglo-Nubian crossbred goats kept rectal temperature within normal limits at the expense of increased heart rate and increased respiratory rate as a means of dissipating heat to maintain homeothermy. Variations in physiological parameters in crossbred Anglo-Nubian goats, showed good adaptability. Shifts and the use of shading effect exerted on the environmental and physiological parameters (thermal comfort) for goats.