Thermoregulatory responses of feeder cattle

被引：88
|
作者：
Brown-Brandl, TM [1 ]
Nienaber, JA [1 ]
Eigenberg, RA [1 ]
Hahn, GL [1 ]
Freetly, H [1 ]
机构：
[1] USDA ARS, US Meat Anim Res Ctr, Clay Ctr, NE 68933 USA
来源：
JOURNAL OF THERMAL BIOLOGY | 2003年 / 28卷 / 02期
关键词：
heat production; respiration rate; rectal temperature; body temperature; beef cattle;
D O I：
10.1016/S0306-4565(02)00052-9
中图分类号：
Q [生物科学];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
A study was designed to investigate the thermoregulatory responses of feeder cattle to both acute and chronic exposures to elevated environmental temperatures. Rectal temperatures (RT) and respiration rate (RR) showed significant differences between temperature treatments. Both RT and RR had a diurnal pattern, which followed the diurnal pattern of the ambient conditions with some lag. Heat production at thermoneutral conditions was significantly higher than at the heat stress treatments. Heat production and respiratory quotient were the only two parameters shown to change with acclimation to heat stress. Published by Elsevier Science Ltd.
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页码：149 / 157
页数：9
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