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פותח על ידי קלירמאש פתרונות בע"מ -
Thermal manipulations during broiler embryogenesis: Effect on the acquisition of thermotolerance
Year:
2008
Source of publication :
Poultry Science
Authors :
יהב, שלמה
;
.
רוזל, מרק
;
.
שינדר, דמיטרי
;
.
Volume :
87
Co-Authors:
Piestun, Y., Institute of Animal Science, Volcani Center, Bet Dagan 50250, Israel, Department of Animal Sciences, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Shinder, D., Institute of Animal Science, Volcani Center, Bet Dagan 50250, Israel
Ruzal, M., Institute of Animal Science, Volcani Center, Bet Dagan 50250, Israel
Halevy, O., Department of Animal Sciences, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Brake, J., Department of Poultry Science, North Carolina State University, Raleigh 27695-7608, United States
Yahav, S., Institute of Animal Science, Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
1516
To page:
1525
(
Total pages:
10
)
Abstract:
Rapid growth rate has presented broiler chickens with serious difficulties when called on to thermoregulate efficiently in hot environmental conditions. Altering the incubation temperature may induce an improvement in the acquisition of thermotolerance (AT). This study aimed to elucidate the effect of thermal manipulations (TM) during the development of the thyroid and adrenal axis of broiler embryos on the potential of broilers to withstand acute thermal stress at marketing age. Cobb broiler embryos were subjected to TM at 39.5°C and 65% RH from embryonic day 7 to 16 (inclusive), either continuously (24 h) or intermittently (12 h). After hatching chicks were raised under standard conditions to 35 d of age and then subjected to thermal challenge (35°C for 5 h). Continuous TM caused a significant decline in hatchability, coupled with significantly lower BW and body temperature at hatching. The intermittent (12-h) chicks showed results similar to the controls but had significantly lower body temperature. Thermal challenge at marketing age demonstrated a significant improvement in AT in both the 12- and 24-h TM-treated broilers, which was characterized by a significantly lower level of stress (as evidenced by the level of plasma corticosterone) and rate of mortality. It was concluded that TM during the portion of embryogenesis when the thyroid and adrenal axis develop and mature had a long-lasting effect and improved the AT of broiler chickens. Whereas intermittent TM had no significant effect on hatchability and performance parameters, continuous TM negatively affected these parameters. ©2008 Poultry Science Association Inc.
Note:
Related Files :
Adrenal Glands
Animal
Animals
Blood
corticosterone
Female
Hypothalamo-Hypophyseal System
Male
stress
עוד תגיות
תוכן קשור
More details
DOI :
10.3382/ps.2008-00030
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
27234
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:29
You may also be interested in
Scientific Publication
Thermal manipulations during broiler embryogenesis: Effect on the acquisition of thermotolerance
87
Piestun, Y., Institute of Animal Science, Volcani Center, Bet Dagan 50250, Israel, Department of Animal Sciences, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Shinder, D., Institute of Animal Science, Volcani Center, Bet Dagan 50250, Israel
Ruzal, M., Institute of Animal Science, Volcani Center, Bet Dagan 50250, Israel
Halevy, O., Department of Animal Sciences, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot 76100, Israel
Brake, J., Department of Poultry Science, North Carolina State University, Raleigh 27695-7608, United States
Yahav, S., Institute of Animal Science, Volcani Center, Bet Dagan 50250, Israel
Thermal manipulations during broiler embryogenesis: Effect on the acquisition of thermotolerance
Rapid growth rate has presented broiler chickens with serious difficulties when called on to thermoregulate efficiently in hot environmental conditions. Altering the incubation temperature may induce an improvement in the acquisition of thermotolerance (AT). This study aimed to elucidate the effect of thermal manipulations (TM) during the development of the thyroid and adrenal axis of broiler embryos on the potential of broilers to withstand acute thermal stress at marketing age. Cobb broiler embryos were subjected to TM at 39.5°C and 65% RH from embryonic day 7 to 16 (inclusive), either continuously (24 h) or intermittently (12 h). After hatching chicks were raised under standard conditions to 35 d of age and then subjected to thermal challenge (35°C for 5 h). Continuous TM caused a significant decline in hatchability, coupled with significantly lower BW and body temperature at hatching. The intermittent (12-h) chicks showed results similar to the controls but had significantly lower body temperature. Thermal challenge at marketing age demonstrated a significant improvement in AT in both the 12- and 24-h TM-treated broilers, which was characterized by a significantly lower level of stress (as evidenced by the level of plasma corticosterone) and rate of mortality. It was concluded that TM during the portion of embryogenesis when the thyroid and adrenal axis develop and mature had a long-lasting effect and improved the AT of broiler chickens. Whereas intermittent TM had no significant effect on hatchability and performance parameters, continuous TM negatively affected these parameters. ©2008 Poultry Science Association Inc.
Scientific Publication
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