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פותח על ידי קלירמאש פתרונות בע"מ -
Thermal manipulation of the embryo modifies the physiology and body composition of broiler chickens reared in floor pens without affecting breast meat processing quality
Year:
2013
Source of publication :
Journal of Animal Science
Authors :
יהב, שלמה
;
.
Volume :
91
Co-Authors:
Loyau, T., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Berri, C., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Bedrani, L., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Métayer-Coustard, S., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Praud, C., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Duclos, M.J., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Tesseraud, S., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Rideau, N., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Everaert, N., Department of Biosystems, K.U. Leuven, Kasteelpark Arenberg 30, 3001 Leuven, Belgium
Yahav, S., Institute of Animal Science, ARO The Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Mignon-Grasteau, S., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Collin, A., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Facilitators :
From page:
3674
To page:
3685
(
Total pages:
12
)
Abstract:
Selection in broiler chickens has increased muscle mass without similar development of the cardiovascular and respiratory systems, resulting in limited ability to sustain high ambient temperatures. The aim of this study was to determine the longlasting effects of heat manipulation of the embryo on the physiology, body temperature (Tb), growth rate and meat processing quality of broiler chickens reared in floor pens. Broiler chicken eggs were incubated in control conditions (37.8°C, 56% relative humidity; RH) or exposed to thermal manipulation (TM; 12 h/d, 39.5°C, 65% RH) from d 7 to 16 of embryogenesis. This study was planned in a pedigree design to identify possible heritable characters for further selection of broiler chickens to improve thermotolerance. Thermal manipulation did not affect hatchability but resulted in lower Tb at hatching and until d 28 post-hatch, with associated changes in plasma thyroid hormone concentrations. At d 34, chickens were exposed to a moderate heat challenge (5 h, 32°C). Greater O2 saturation and reduced CO2 partial pressure were observed (P < 0.05) in the venous blood of TM than in that of control chickens, suggesting long-term respiratory adaptation. At slaughter age, TM chickens were 1.4% lighter and exhibited 8% less relative abdominal fat pad than controls. Breast muscle yield was enhanced by TM, especially in females, but without significant change in breast meat characteristics (pH, color, drip loss). Plasma glucose/insulin balance was affected (P < 0.05) by thermal treatments. The heat challenge increased the heterophil/lymphocyte ratio in controls (P < 0.05) but not in TM birds, possibly reflecting a lower stress status in TM chickens. Interestingly, broiler chickens had moderate heritability estimates for the plasma triiodothyronine/thyroxine concentration ratio at d 28 and comb temperature during the heat challenge on d 34 (h2 > 0.17). In conclusion, TM of the embryo modified the physiology of broilers in the long term as a possible adaptation for heat tolerance, without affecting breast meat quality. This study highlights the value of 2 new heritable characters involved in thermoregulation for further broiler selection. © 2013 American Society of Animal Science. All rights reserved.
Note:
Related Files :
body composition
Broiler chicken
heat stress
Meat quality
Respiratory physiology
Thermal manipulation of embryos
עוד תגיות
תוכן קשור
More details
DOI :
10.2527/jas.2013-6445
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24669
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:09
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Scientific Publication
Thermal manipulation of the embryo modifies the physiology and body composition of broiler chickens reared in floor pens without affecting breast meat processing quality
91
Loyau, T., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Berri, C., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Bedrani, L., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Métayer-Coustard, S., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Praud, C., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Duclos, M.J., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Tesseraud, S., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Rideau, N., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Everaert, N., Department of Biosystems, K.U. Leuven, Kasteelpark Arenberg 30, 3001 Leuven, Belgium
Yahav, S., Institute of Animal Science, ARO The Volcani Center, P.O. Box 6, Bet Dagan, 50250, Israel
Mignon-Grasteau, S., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Collin, A., INRA, UR83 Recherches Avicoles, F-37380 Nouzilly, France
Thermal manipulation of the embryo modifies the physiology and body composition of broiler chickens reared in floor pens without affecting breast meat processing quality
Selection in broiler chickens has increased muscle mass without similar development of the cardiovascular and respiratory systems, resulting in limited ability to sustain high ambient temperatures. The aim of this study was to determine the longlasting effects of heat manipulation of the embryo on the physiology, body temperature (Tb), growth rate and meat processing quality of broiler chickens reared in floor pens. Broiler chicken eggs were incubated in control conditions (37.8°C, 56% relative humidity; RH) or exposed to thermal manipulation (TM; 12 h/d, 39.5°C, 65% RH) from d 7 to 16 of embryogenesis. This study was planned in a pedigree design to identify possible heritable characters for further selection of broiler chickens to improve thermotolerance. Thermal manipulation did not affect hatchability but resulted in lower Tb at hatching and until d 28 post-hatch, with associated changes in plasma thyroid hormone concentrations. At d 34, chickens were exposed to a moderate heat challenge (5 h, 32°C). Greater O2 saturation and reduced CO2 partial pressure were observed (P < 0.05) in the venous blood of TM than in that of control chickens, suggesting long-term respiratory adaptation. At slaughter age, TM chickens were 1.4% lighter and exhibited 8% less relative abdominal fat pad than controls. Breast muscle yield was enhanced by TM, especially in females, but without significant change in breast meat characteristics (pH, color, drip loss). Plasma glucose/insulin balance was affected (P < 0.05) by thermal treatments. The heat challenge increased the heterophil/lymphocyte ratio in controls (P < 0.05) but not in TM birds, possibly reflecting a lower stress status in TM chickens. Interestingly, broiler chickens had moderate heritability estimates for the plasma triiodothyronine/thyroxine concentration ratio at d 28 and comb temperature during the heat challenge on d 34 (h2 > 0.17). In conclusion, TM of the embryo modified the physiology of broilers in the long term as a possible adaptation for heat tolerance, without affecting breast meat quality. This study highlights the value of 2 new heritable characters involved in thermoregulation for further broiler selection. © 2013 American Society of Animal Science. All rights reserved.
Scientific Publication
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