LEITE, P. G.; http://lattes.cnpq.br/5821255542462223; LEITE, Patricio Gomes.
Resumo:
The objective of this study was to determine the consumption of water
containing increasing levels of dissolved solids, by sheep of Morada Nova race but also
their feeding behavior, physiological parameters of the race, will undergo two different
temperatures in climate chamber. The work was developed in a climate chamber used
18 sheep of the Morada Nova breed, age and average weight of ten months, and 25 ± kg
respectively, submitted to two temperatures, 26 and fixed relative air 32 ° C in 65%, and
consuming water with three levels of salinity, 3; 6 and 9 dS.m-1. We collected data of
physiological parameters such as respiratory rate (RR), heart rate (HR), rectal
temperature (RT) and surface temperature (TS), the determination of thermal gradients
was made by the difference between the rectal and surface temperatures (TR-TS) and
between the surface and ambient temperatures (TS-TA) as adaptability parameter. For
the evaluation of feeding behavior was used the technique of instant scan every five
minutes, completely randomized design in a factorial scheme (2x3) with six
replications. Data were evaluated by analysis of variance, and when significant, were
compared by Tukey test at 5% probability. There was no statistical difference with
increasing temperature for the TR and FR, and the TR remained constant and within
normal limits. For temperature gradients, temperature was effect (P <0.05) with
increasing temperature within the chamber. Ingestive behavior was a reduction in the
ruminating time with increasing temperature, and there was an increase in the idle time,
but there were no differences in the intake of dry matter and water. With no significant
difference between different salinity levels studied for physiological parameters and
ingestive. So we can say that the sheep of the Morada Nova race were not affected by
water salinity levels up to 9 dS.m-1 and temperature up to 32 ° C, being adapted to the
conditions studied.