Adaptabilidade de ovinos em função índices ambientais.

Abstract

The experiment was conducted in the dry season, farm Umari, localized in Caturité in micro East Cariri. Of the 20 male sheep of Santa Inês and Dorper were used, being ten animals of each breed. For the physiological parameters in a completely randomized design was split plot were used, with primary treatments consisted of the races and side, by turns. In environmental comfort parameters observed a high rectal temperature (RT) in time from 17:00 For the Dorper, different to the Santa Inês breed whose TR appeared high at all times, both in the sun room; in the case of genetic group, this result showed, for the shadow environment, reversal behavior and rectal temperature, and a lower RR for the Dorper breed at 08h00 and Santa Inês breed for the 17h00. Based on the effect of different environments on the activity of rectal temperature of sheep in various schedules reviews TR senses a smaller environment to which animals were exposed, for the Dorper, the time from 08.00. Relating the average respiratory rate (RR) schedules in shadow environment, we observed statistically, these two races, equal means both in times of 11.00 and 14.00 in shadow environment. Comparing the means of RR in different times and in different genetic environments groups, we found increased respiratory rate, for both races to (sun) at 11.00 hours; already for the environment (shade) the Dorper breed showed increased respiratory rate at all times, unlike Santa Ines. Evaluating the average heart rate (HR) at various times with the other races, concludes increase in heart rate for the Dorper (sun) race in time from 14h00 and 17h00, already for Santa Inês (sun) this increase in heart rate occurred during the hours of 11h00, 14h00 and 17h00. Comparing the average HR in different genetic groups at different times and environments, it was observed that the means were equal to the respiratory frequency in both sun room and in the shadow environment. With reference to the rate of temperature black globe humidity index as thermal comfort in the sun room, the values of ITGUSL, presented high regardless of shifts, with increased ITGUSL part 09:00; already in the afternoon it got a high temperature of 12: h00as 14: h00, whose maximum was Aces 13: 00 pm, Soon after, the 15: 00 pm, there was a decrease in temperature, the environment in the sun ITGUSl. The results obtained for the coefficient adaptation (CA) according to the Benezra-test if differences were observed between the two breeds evaluated, demonstrating greater ability of animals Santa Ines to dissipate heat through evapotranspiration. Santa Inês sheep As much as they are adapted to semi-arid region, sheep triggered thermoregulatory responses differentiated when compared with the Doper between sun and shade environment evaluated.