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Title: Cloacal and surface temperatures of broilers subject to thermal stress
Keywords: Animal environment
Thermal comfort
Thermographic image
Physiologic parameters
Issue Date: Oct-2017
Publisher: Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP)
Faculdade de Ciências Agrárias e Veterinárias (FCAV)
Citation: ABREU, L. H. P. et al. Cloacal and surface temperatures of broilers subject to thermal stress. Engenharia Agrícola, Jaboticabal, v. 37, n. 5, p. 877-886, Sept./Oct. 2017.
Abstract: The cloacal and surface temperatures are important physiological parameters to quantify the thermal comfort of animals, its variations may occur as a function of thermal variables. In this context, the goal of the present study was to evaluate the cloacal (tclo) and surface (tsur) temperatures of Cobb 500® broilers, in the second week of life, subjected to different air dry-bulb temperature (24, 27, 30 and 33 °C) and stress durations (1, 2, 3 and 4 days). The experiment was carried out in four climate-controlled wind tunnels. Air relative humidity and air velocity were set at 60% and 0.2 m s-1, respectively. The tclo and tsur were measured daily through digital thermometer and thermographic camera, respectively. Analysis of variance and Scott Knott mean test at 5% probability were applied to the data. The results indicate that the stress by low air temperature (24 and 27 °C) resulted decreased of tclo and tsur (p<0.05, Scott-Knott test). When subjected to high air temperature stress (33 °C), there was no significant difference (p>0.05, Scott-Knott test) compared to the control treatment (30 °C). Acclimation of broilers to thermal stress occurred from the second day of stress.
Appears in Collections:DEG - Artigos publicados em periódicos

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