Parâmetros fisiolóficos e índice de tolerância ao calor em novilhos senepol
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2016-08-26
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Universidade Federal de Goiás
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The increase in livestock production demand has required that animals are
increasingly adverse weather conditions more suited to express the maximum of
genetics, nutrition and management received. So, identify, and evaluate mensure
animals more adapted breeds is an aspect to be explored. The Senepol breed was
formed by British breeds (Red Poll) and African (N'Dama) to obtain a suitable animal.
This study aimed to measure the climate and physiological variables to determine the
index of tolerance Steers heat of Senepol race. The animals were submitted to
thermolytic capacity test checking the most suitable hot weather. The experiment was
conducted in Genetic Alge plantation in Nerópolis - GO, during the summer months.
17 steers average age of 12 months analyzed the sun and the shade durnte 3
nonconsecutive days of spring and summer were used. completely randomized design
and and analyzed by Tukey's test at 5% and the average for simple correlation was
used. The meteorological variables indicated that the animals could present stress by
ITU bands that recorded values between 78 and 80 and the shade 99 and 106 to the
sun. However, the physiological conditions results showed no significant differences
(P> 0.05). Significant differences (P> 0.05) between the means of the animals were
observed when the animals in the shade and then returned to the sun. The animals
showed significant results (P> 0.05) to return to thermal comfort when, after sun
returned to the shadow as verified by TSC with averages of 37ºC in the shade and
the sun 39ºC. In addition, correlations between means showed that when the animal
featured most TSC and ICT also had higher TR and FR. In most ICT average was
10.17 and 9.7 indicating the lowest adapted to heat. It was concluded from this work
that the Senepol breed showed good tolerance to heat and can be a tool for selecting
programs as well as in industrial intersections prove adapted to the climatic conditions
in Goiás.
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PIMENTA, P. S. Parâmetros fisiolóficos e índice de tolerância ao calor em novilhos senepol. 2016. 43 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Goiás, Goiânia, 2016.