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פותח על ידי קלירמאש פתרונות בע"מ -
Effects of heat conditioning at d 16 to 18 of incubation or during early broiler rearing on embryo physiology, post-hatch growth performance and heat tolerance
Year:
2008
Source of publication :
Archiv fur Geflugelkunde
Authors :
יהב, שלמה
;
.
Volume :
72
Co-Authors:
Tona, K., Department of Animal Production, School of Agriculture, University of Lome, Togo
Onagbesan, O., Lab for Physiology and Immunology of Domestic Animals, Katholieke Universiteit Leuven, Heverlee, Belgium, Lab for Physiology and Immunology of Domestic Animals, Katholieke Universiteit Leuven, Kasteelpark Arenberg 30, 6-3001 Heverlee, Belgium
Bruggeman, V., Lab for Physiology and Immunology of Domestic Animals, Katholieke Universiteit Leuven, Heverlee, Belgium
Collin, A., SRA, INRA, Nouzilly, France
Berri, C., SRA, INRA, Nouzilly, France
Duclos, M.J., SRA, INRA, Nouzilly, France
Tesseraud, S., SRA, INRA, Nouzilly, France
Buyse, J., Lab for Physiology and Immunology of Domestic Animals, Katholieke Universiteit Leuven, Heverlee, Belgium
Decuypere, E., Lab for Physiology and Immunology of Domestic Animals, Katholieke Universiteit Leuven, Heverlee, Belgium
Yahav, S., Institute of Animal Science, ARO the Vulcani Center, Bet Pagan, Israel
Facilitators :
From page:
75
To page:
83
(
Total pages:
9
)
Abstract:
This study was designed to test the effect of pre- and post-hatch temperature conditioning or a combination of both, on the acquisition of heat tolerance during the adult life of broiler chickens. Nine hundred hatching eggs produced by Cobb broiler breeders were incubated at standard incubation conditions until d 16. Half of the eggs were subjected to temperature conditioning for 3 h/day (39.5 °C, 65% relative humidity (RH)) at d 16, 17 and 18 of incubation (T group) while the other half Control group (C group) were kept at standard incubation conditions. From the end of d 18 until end of incubation, embryo heat production (HP), gas partial pressure in the air chamber at IP, and blood parameters (T3 and corticosterone) were measured. Also, hatching time for individual chick, body temperature (Tb) and body weight (BW) and the number of hatched chicks were recorded. Hatched chicks were raised under regular conditions. At the age of 3 d, the chicks of each incubation condition group were divided into 2 groups: half of the chicks of each group (C and T) were subjected to thermal conditioning (41.0°C for 6 hours). The other half of the chicks was used as control. The 4 groups of broilers were reared until 42 d of age. During post-hatch period, Tb, blood parameters and BW were again measured. At 42 d all broilers were heat challenged at 35°C for 6 h. After heat challenge, mortality was recorded and blood samples were collected. The results indicate that thermal conditioning during incubation had no effect on hatchability of eggs but prolonged incubation duration, decreased T3 (at IP), corticosterone (at IP and hatch), HP and Tb. Overall, at 3 d post-hatch, prenatal condition increased while post-natal conditioning decreased corticosterone levels. Heat challenge at 42 d post-hatch decreased T3 levels in the TC group and increased corticosterone levels in postnatally conditioned group. Differences between BW become obvious from 28 d post-hatch and were in the following order: TT > CC = CT > TC. At 42, the highest BW was obtained in the broilers of TC group. Heat conditioning at 3 d of age improved heat tolerance in response to heat challenge at 42 d. post-hatch whereas prenatal treatment had a strong negative effect. It is concluded that heat treatment during incubation or during post-hatch life induces completely different effects. © Verlag Eugen Ulmer, Stuttgart.
Note:
Related Files :
Broiler
Gallus gallus
Growth
Heat conditioning
heat stress
Physiological parameters
Thermotolerance
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
23181
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:57
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Scientific Publication
Effects of heat conditioning at d 16 to 18 of incubation or during early broiler rearing on embryo physiology, post-hatch growth performance and heat tolerance
72
Tona, K., Department of Animal Production, School of Agriculture, University of Lome, Togo
Onagbesan, O., Lab for Physiology and Immunology of Domestic Animals, Katholieke Universiteit Leuven, Heverlee, Belgium, Lab for Physiology and Immunology of Domestic Animals, Katholieke Universiteit Leuven, Kasteelpark Arenberg 30, 6-3001 Heverlee, Belgium
Bruggeman, V., Lab for Physiology and Immunology of Domestic Animals, Katholieke Universiteit Leuven, Heverlee, Belgium
Collin, A., SRA, INRA, Nouzilly, France
Berri, C., SRA, INRA, Nouzilly, France
Duclos, M.J., SRA, INRA, Nouzilly, France
Tesseraud, S., SRA, INRA, Nouzilly, France
Buyse, J., Lab for Physiology and Immunology of Domestic Animals, Katholieke Universiteit Leuven, Heverlee, Belgium
Decuypere, E., Lab for Physiology and Immunology of Domestic Animals, Katholieke Universiteit Leuven, Heverlee, Belgium
Yahav, S., Institute of Animal Science, ARO the Vulcani Center, Bet Pagan, Israel
Effects of heat conditioning at d 16 to 18 of incubation or during early broiler rearing on embryo physiology, post-hatch growth performance and heat tolerance
This study was designed to test the effect of pre- and post-hatch temperature conditioning or a combination of both, on the acquisition of heat tolerance during the adult life of broiler chickens. Nine hundred hatching eggs produced by Cobb broiler breeders were incubated at standard incubation conditions until d 16. Half of the eggs were subjected to temperature conditioning for 3 h/day (39.5 °C, 65% relative humidity (RH)) at d 16, 17 and 18 of incubation (T group) while the other half Control group (C group) were kept at standard incubation conditions. From the end of d 18 until end of incubation, embryo heat production (HP), gas partial pressure in the air chamber at IP, and blood parameters (T3 and corticosterone) were measured. Also, hatching time for individual chick, body temperature (Tb) and body weight (BW) and the number of hatched chicks were recorded. Hatched chicks were raised under regular conditions. At the age of 3 d, the chicks of each incubation condition group were divided into 2 groups: half of the chicks of each group (C and T) were subjected to thermal conditioning (41.0°C for 6 hours). The other half of the chicks was used as control. The 4 groups of broilers were reared until 42 d of age. During post-hatch period, Tb, blood parameters and BW were again measured. At 42 d all broilers were heat challenged at 35°C for 6 h. After heat challenge, mortality was recorded and blood samples were collected. The results indicate that thermal conditioning during incubation had no effect on hatchability of eggs but prolonged incubation duration, decreased T3 (at IP), corticosterone (at IP and hatch), HP and Tb. Overall, at 3 d post-hatch, prenatal condition increased while post-natal conditioning decreased corticosterone levels. Heat challenge at 42 d post-hatch decreased T3 levels in the TC group and increased corticosterone levels in postnatally conditioned group. Differences between BW become obvious from 28 d post-hatch and were in the following order: TT > CC = CT > TC. At 42, the highest BW was obtained in the broilers of TC group. Heat conditioning at 3 d of age improved heat tolerance in response to heat challenge at 42 d. post-hatch whereas prenatal treatment had a strong negative effect. It is concluded that heat treatment during incubation or during post-hatch life induces completely different effects. © Verlag Eugen Ulmer, Stuttgart.
Scientific Publication
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