Efeito da dieta e dos turnos sobre as respostas fisiológicas de ovinos Santa Inês em confinamento no Semiárido Paraibano.

Abstract

The objective of this study was to evaluate by infrared thermography the effect of diet and the shifts on the physiological responses and thermal gradients of Santa Inês sheep raised under intensive supplemented with organic and inorganic minerals in the semiarid Paraiba. Were used 20 sheep, distributed in a completely randomized design with a 4x2 factorial arrangement (four diets and two shifts), with 5 repetitions. Analysis of variance revealed significant effects of shift (P<0.05) for all treatments, with the highest average observed in the afternoon, being the highest averages observed in the afternoon, already to thermal gradients, it was verified the highest averages in the morning shift. The highest average superficial temperature were found both in the animals that were treated without mineral supplementation (34.96°C) and in animals that were treated with copper chelate (35.56°C). There was an interaction between treatments and shifts, there was not statistical difference (P <0.05) just between the average rectal temperature of the animals that received treatments without mineral supplementation of the diet (38.77°C) and diet with zinc chelate (38.10°C), the morning shift. For respiratory rate, observed values of 30.48 and 52.69 mov / min in both rounds respectively, showing a low stress. The environmental conditions in the semiarid are stressful, especially in the afternoon, Santa Inês sheep supplemented with organic and inorganic minerals satisfactorily responded to the climatic conditions of the semiarid region, with physiological responses within normal standards. It is necessary to develop more research on the use of chelated trace minerals in the diet of sheep, especially in respect to the effect on these physiological variables.