Please use this identifier to cite or link to this item:
|Title: ||Effect of thermal environment on body temperature of early-stage laying hens|
|Authors: ||Andrade, A.|
Fitas da Cruz, V.
|Keywords: ||environmental conditions|
|Issue Date: ||2018|
|Citation: ||Andrade R.R., Tinoco I.F., Souza C.F., Oliveira K.P., Barbari M.,
Cruz V.M.F., Baptista F.J., Vilela M.O., Conti L. and Rossi G. 2018. Effect of thermal environment on body temperature of early-stage laying hens. Agronomy Research 16(2), 320-327. https://doi.org/10.15159/AR.18.068|
|Abstract: ||The thermal comfort condition of early-stage laying hens can be verified by means of
physiological variations. The mean surface temperature and cloacal temperature are important parameters to demonstrate the effect of the thermal environment on the birds. The objective of the present study was to correlate homeostasis and stress with physiological responses (mean surface temperature and cloacal temperature) of lightweight laying hens of the Lohmann LSL
Lite line aged from one to forty-two days when submitted to different thermal environments.
A total of 864 birds with the same age, origin and uniform body weight were randomly distributed in four climatic chambers. The characterization of the different environments was as follows:
thermal comfort temperature (33.0-19.0ºC), two cold stress levels (28.0-17.0ºC and 25.0-17.0ºC) and one level of heat stress (38.0-22.0ºC). The experiment was performed in a completely randomized design in the subdivided plots scheme, with four treatments in the plots and the evaluations (days) in the subplots. The means were compared using the Tukey test, adopting the 5% probability level. The birds maintained the physiological responses, based on cloacal and surface temperatures, within the normal range for all evaluated treatments during the period between 01 and 42 days of life. The surface temperature of the birds varied as a function
of the air temperature of each breeding environment, with lower surface temperatures for mild cold and moderate cold treatments.|
|Appears in Collections:||MED - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
ERU - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.