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Effect of repetitive acute cold exposures during the last phase of broiler embryogenesis on cold resistance through the life span
Year:
2009
Source of publication :
Poultry Science
Authors :
Giloh, M.
;
.
Rusal, Mark
;
.
Shinder, Dmitry A.
;
.
Yahav, Shlomo
;
.
Volume :
88
Co-Authors:
Shinder, D., Institute of Animal Science, The Volcani Center, Bet Dagan 50250, Israel
Rusal, M., Institute of Animal Science, The Volcani Center, Bet Dagan 50250, Israel
Giloh, M., Institute of Animal Science, The Volcani Center, Bet Dagan 50250, Israel
Yahav, S., Institute of Animal Science, The Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
636
To page:
646
(
Total pages:
11
)
Abstract:
The time just before hatch is critical, because the embryo shifts toward internal and external pipping. This study aimed to determine the beneficial effect of repeated acute reductions of the incubation temperature during the last phase of broiler embryogenesis on posthatch cold tolerance and on the development of ascites syndrome. Fertile eggs were incubated at 37.8°C and 56% RH. At 18 and 19 d of incubation, 3 treatments were conducted, comprising 2 or 3 exposures to 15°C for 30 or 60 min each. During these cold exposures, egg temperature was measured by infrared thermography to determine sensible heat loss from the eggs. At hatch, BW and body temperature were measured. At 3 and 14 d of age, chicks were challenged by cold exposure to 10°C for 3 h. From 14 d of age onward, three-quarters of the chicks were raised under ascitesinducing conditions (AIC) and the others were raised under regular conditions. The sensible heat loss from the eggs was 512 ± 66 cal and 718 ± 126 cal for 30 and 60 min of cold exposure, respectively. No effect of treatment on hatchability was observed, but body temperature and BW were greater to significantly greater in the treated chicks. Cold challenges at 3 and 14 d of age revealed a relative thermoregulatory advantage of embryos exposed to cold for 60 min. Under AIC, fewer treated chickens than controls developed ascites. At 38 d of age, BW and relative breast muscle weight were numerically to significantly greater in the treated chicks than in the control chicks when both were raised under regular conditions, whereas no differences were observed among the chicks raised under AIC. Repeated brief acute cold exposures during the last phase of embryogenesis appeared to improve the ability of growing broilers to withstand low ambient temperatures during their life span. Moreover, chickens treated during embryogenesis improved their performance under regular growth conditions. © 2009 Poultry Science Association Inc.
Note:
Related Files :
aging
Animal
Animals
Chickens
Cold exposure
Growth, Development and Aging
metabolism
Poultry Diseases
risk factor
Show More
Related Content
More details
DOI :
10.3382/ps.2008-00213
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28672
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:41
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Scientific Publication
Effect of repetitive acute cold exposures during the last phase of broiler embryogenesis on cold resistance through the life span
88
Shinder, D., Institute of Animal Science, The Volcani Center, Bet Dagan 50250, Israel
Rusal, M., Institute of Animal Science, The Volcani Center, Bet Dagan 50250, Israel
Giloh, M., Institute of Animal Science, The Volcani Center, Bet Dagan 50250, Israel
Yahav, S., Institute of Animal Science, The Volcani Center, Bet Dagan 50250, Israel
Effect of repetitive acute cold exposures during the last phase of broiler embryogenesis on cold resistance through the life span
The time just before hatch is critical, because the embryo shifts toward internal and external pipping. This study aimed to determine the beneficial effect of repeated acute reductions of the incubation temperature during the last phase of broiler embryogenesis on posthatch cold tolerance and on the development of ascites syndrome. Fertile eggs were incubated at 37.8°C and 56% RH. At 18 and 19 d of incubation, 3 treatments were conducted, comprising 2 or 3 exposures to 15°C for 30 or 60 min each. During these cold exposures, egg temperature was measured by infrared thermography to determine sensible heat loss from the eggs. At hatch, BW and body temperature were measured. At 3 and 14 d of age, chicks were challenged by cold exposure to 10°C for 3 h. From 14 d of age onward, three-quarters of the chicks were raised under ascitesinducing conditions (AIC) and the others were raised under regular conditions. The sensible heat loss from the eggs was 512 ± 66 cal and 718 ± 126 cal for 30 and 60 min of cold exposure, respectively. No effect of treatment on hatchability was observed, but body temperature and BW were greater to significantly greater in the treated chicks. Cold challenges at 3 and 14 d of age revealed a relative thermoregulatory advantage of embryos exposed to cold for 60 min. Under AIC, fewer treated chickens than controls developed ascites. At 38 d of age, BW and relative breast muscle weight were numerically to significantly greater in the treated chicks than in the control chicks when both were raised under regular conditions, whereas no differences were observed among the chicks raised under AIC. Repeated brief acute cold exposures during the last phase of embryogenesis appeared to improve the ability of growing broilers to withstand low ambient temperatures during their life span. Moreover, chickens treated during embryogenesis improved their performance under regular growth conditions. © 2009 Poultry Science Association Inc.
Scientific Publication
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