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Induction of thermotolerance in male broiler chickens by temperature conditioning at an early age
Year:
1996
Source of publication :
Poultry Science
Authors :
Hurvitz, Shmuel
;
.
Yahav, Shlomo
;
.
Volume :
75
Co-Authors:
Yahav, S., Institute of Animal Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Hurwitz, S., Institute of Animal Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
402
To page:
406
(
Total pages:
5
)
Abstract:
Chicks were conditioned by exposure to heat stress (36 ± 1 C; 70 to 80% RH) for 24 h at the age of 5, or 5 and 7 d. During conditioning, weight gain was depressed. Due to accelerated growth during the postconditioning period, a complete compensation for lost weight gain was achieved by the group conditioned at 5 d, but only a partial compensation was obtained in the group conditioned at both 5 and 7 d. At the age of 42 d, challenge with acute heat stress (35 ± 1 C; 20 to 30% RH) resulted in a large increase in cloacal temperature of the controls and a more moderate increase in the conditioned chickens. Mortality during the thermal challenge was significantly higher in the controls than that of the previously exposed (conditioned) groups. Conditioning at an early age resulted in hemodynamic changes (significant decrease in heart weight and hematocrit) and reduced plasma triiodothyronine (T3) concentration. The results suggest that reduced T3 and hemodynamic changes may be part of the mechanism associated with improved thermotolerance by early age temperature conditioning.
Note:
Related Files :
adaptation
Adaptation, Physiological
Age Factors
Animal
Animals
Blood
body temperature
Chickens
heat stress
Male
Show More
Related Content
More details
DOI :
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28599
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:40
You may also be interested in
Scientific Publication
Induction of thermotolerance in male broiler chickens by temperature conditioning at an early age
75
Yahav, S., Institute of Animal Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Hurwitz, S., Institute of Animal Science, Agricultural Research Organization, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Induction of thermotolerance in male broiler chickens by temperature conditioning at an early age
Chicks were conditioned by exposure to heat stress (36 ± 1 C; 70 to 80% RH) for 24 h at the age of 5, or 5 and 7 d. During conditioning, weight gain was depressed. Due to accelerated growth during the postconditioning period, a complete compensation for lost weight gain was achieved by the group conditioned at 5 d, but only a partial compensation was obtained in the group conditioned at both 5 and 7 d. At the age of 42 d, challenge with acute heat stress (35 ± 1 C; 20 to 30% RH) resulted in a large increase in cloacal temperature of the controls and a more moderate increase in the conditioned chickens. Mortality during the thermal challenge was significantly higher in the controls than that of the previously exposed (conditioned) groups. Conditioning at an early age resulted in hemodynamic changes (significant decrease in heart weight and hematocrit) and reduced plasma triiodothyronine (T3) concentration. The results suggest that reduced T3 and hemodynamic changes may be part of the mechanism associated with improved thermotolerance by early age temperature conditioning.
Scientific Publication
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