Author(s): Uribe-Velasquez, L. F. ; Oba, Eunice [UNESP] ; Brasil, LHD ; Wechsler, F. S. ; Stachissini, AVM
Date: 2014
Persistent ID: http://hdl.handle.net/11449/32826
Origin: Oasisbr
Subject(s): goats; cortisol; thyroid hormones; lipids metabolites; radiation; rectal temperature
Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2014-02-26T17:22:49Z No. of bitstreams: 1 WOS000077989800012.pdf: 47825 bytes, checksum: c2783444e5f8f57782f5066d6ad61667 (MD5)
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The objective of this work was to determine the plasma concentrations of cortisol, thyroid hormone, lipids metabolites and corporal temperature or lactating Alpine goats submitted to heat stress. Six lactating Alpine goats were allotted randomly in a crossover experimental design for two groups: thermoneutral conditions or thermal stress. An adaptation period of 28 days was followed by Four-periods of 14 days each, when the animals submitted to thermal stress were exposed to the average temperature of 33.84 degrees C; THI of 86.20; BGT of 36.18 and BT of 32.11 degrees C from 8:00 am to 5:00 pm, including simulated solar radiation from 10:00 am to 3:00 pm. There were no differences between the groups in the plasma concentrations of cortisol, thyroid hormones (T-3-triiodothyronine and T-(4) tiroxine), and lipid metabolites (cholesterol and HDL). Rectal temperature was higher during thermal stress when compared to the group of animals in thermoneutral conditions. The goats maintained the thyroid plasma hormone concentrations, when exposed to repealed and intermittent stress, in spite of the occurrence of hypertermia during heat stress.
UNESP, Fac Med Vet & Zootecn, São Paulo, Brazil
UNESP, Dept Higiene Sanitaria & Saúde Publ, São Paulo, Brazil
UNESP, Fac Med Vet & Zootecn, São Paulo, Brazil
UNESP, Dept Higiene Sanitaria & Saúde Publ, São Paulo, Brazil
