Efeito da época do ano e de grupos genéticos sobre o comportamento fisiológico de caprinos em condições naturais do Semi-árido Paraibano.

Abstract

The present work had as objective to evaluate the impact of the environment on the physiological behavior of different genetic groups of goat created in the natural conditions o f the semi-arid paraiba's at two times (it dries and rainy). 21 animals, seven of each genetic group had been used, distributed in a delineation entirely radomized with three treatments and seven repetitions. The ambient variable, Temperature Dry Bulb (TBS), Temperature of Humid Bulb (TBU), Relative Humidity of Air (UR), Temperature of Black Globe (TGN) in the shade and the sun at the time dries and rainy and Index of Temperature of Black Globe and Umidade (ITGU) in the shade and sun, had been registered of the 10:00 the 15:00hours. The physiological parameters: Rectal temperature (TR), Breathing Frequency (FR) and Superficial Temperature had been surveyed per three days not consecutive. It had time effect (P<0,05), for all the ambient variable, with exception of TBU, TGN and ITGU in the shade. With regard to the physiological parameters it had significant effect (P<0,05) for genetic group in relation the FR and TR after estresse it, also had effect of time (dries and rainy) and hour (before and after it estresse it), being the found average greaters after stress it at the time dries, with exception o f the TR. How much to the Index o f Tolerance to the Heat (ITC) it did not have significant difference (P>0,05) between the studied genotypes, but it had significant effect (P<0,05) for time, where the average greater was found at the time dries. It was observed that in the conditions of this experiment the goat ones had demonstrated to be suitable the climatic conditions o f the semi-arid northeastern.