Real-time variations in body temperature of laying hens with increasing ambient temperature at different relative humidity levels

Poultry Science
Y ChangX Li

Abstract

In order to measure the real-time variations in body temperature with increasing ambient temperature (AT) at different relative humidity (RH) levels, 60 Jinghong laying hens (35-wk-old) were raised in 3 controlled climate chambers (10 cages with 2 birds per chamber). The RH was fixed at one of 3 levels comprising 35, 50, or 85%, and the AT was increased gradually by 1 degree per 0.5 h from 18 to 35°C in the 3 chambers. The core temperature (CT) and surface temperature (ST) of the hens, as well as the AT in the 3 chambers were recorded at 3 min intervals using mini temperature data loggers. The data were analyzed with a broken-line model to determine the inflection point temperature (IPT, the certain AT above which the body temperature of the hens started to change). The experiment was repeated 3 times on 3 d. The IPTs of the laying hens were 23.89 and 25.46°C based on ST and CT at 50% RH, respectively, which indicated that the upper critical temperature of the thermoneutral zone of hens may be a specific temperature between 23.89°C and 25.46°C. The IPTs of the laying hens were 24.11 and 25.20°C based on ST and CT at RH 35%, respectively, and 21.93 and 24.45°C at RH 85%. The RH significantly affected the IPT of ST (P < 0.001). T...Continue Reading

References

Jan 1, 1986·Comparative Biochemistry and Physiology. A, Comparative Physiology·D Wolfenson
Oct 1, 1983·British Poultry Science·A Meltzer
Apr 1, 1981·Pflügers Archiv : European journal of physiology·D WolfensonA Berman
Nov 1, 1980·British Poultry Science·A ArieliA Berman
Mar 15, 1997·Annals of the New York Academy of Sciences·G L Brengelmann, M V Savage
Jun 13, 2012·International Journal of Biometeorology·João Batista Freire de SouzaLeonardo Lelis de Macedo Costa
Nov 1, 1987·Pflügers Archiv : European journal of physiology·UNKNOWN Commission for Thermal Physiology of the International Union of Physiological Sciences (IUPS Thermal Commission)

❮ Previous
Next ❯

Citations

May 10, 2020·Journal of Animal Physiology and Animal Nutrition·Monsuru O AbiojaObafemi F Akinjute
May 4, 2020·Poultry Science·M G L CândidoR S Gates
Aug 24, 2021·Journal of Thermal Biology·Da-Hye KimKyung-Woo Lee

❮ Previous
Next ❯

Related Concepts

Related Papers

Tropical Animal Health and Production
J Njoya, M Picard
Zeitschrift für Tierphysiologie, Tierernährung und Futtermittelkunde
A J van EsC W Scheele
© 2022 Meta ULC. All rights reserved