2024-03-29T06:33:34Zhttp://buleria.unileon.es/oai/requestoai:buleria.unileon.es:10612/107322020-12-10T09:02:43Zcom_10612_17col_10612_18
Facultad de Ciencias Biologicas y Ambientales
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500
Olfati, Ali
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500
Mojtahedin, Ali
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500
Sadeghi, Tayebeh
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Akbari, Mohsen
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Martínez Pastor, Felipe
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500
0000-0003-2987-4302
Biologia Celular
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500
2018
2019-05-12T23:51:29Z
2019-05-12T23:51:29Z
2019-05-13
Spanish Journal of Agricultural Research, 2018, vol. 16, n. 2
http://revistas.inia.es/index.php/sjar/article/view/12753
http://hdl.handle.net/10612/10732
P. 1-7
This study was conducted to compare the effects of thermal stress on growth performance and some immunity variables of broiler chickens. Birds were randomly assigned to one of three thermal treatments as follows: cold stress (CS, 12±1 °C), (b) heat stress (HS, 33±3 °C) and (c) thermoneutral (TN, 24±2 °C). Body weight gain (BWG), feed intake (FI), water intake (WI) and feed conversion ratio (FCR) were recorded. In order to evaluate the primary and secondary humoral immune responses, two birds per replicate were intravenously administrated with a suspension of 7% sheep red blood cell (SRBC) at 28 and 35 days. The heat-stressed broiler chickens had lower FI (-14.90%), BWG (-25.71%) and higher FCR (+13.06%) in comparison to broiler chickens reared under TN condition (p<0.001) from 1 to 42 days of age. The cold-stressed broiler chickens showed lower FI (-22.05%), BWG (-38.32%) and higher FCR (+22.47%) in comparison to birds reared under TN conditions (p<0.001). Stressed birds (CS and HS) showed decreased antibody titer against SRBC, lymphocyte count and the relative weights of lymphoid organs and increased heterophil count, heterophil to lymphocyte ratio and the serum concentration of corticosterone, in comparison to birds in TN group (p<0.001). In conclusion, HS and CS conditions have similar negative effects on performance and immunity of broiler chickens.
SI
eng
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria
Veterinaria
Antibody titer
Broiler chicken
Immunity
Thermal stress
Comparison of growth performance and immune responses of broiler chicks reared under heat stress, cold stress and thermoneutral conditions
info:eu-repo/semantics/article
THUMBNAIL
100 Comparison of growth performance SpanJAgricRes_016_0505_2018 PDF.pdf.jpg
100 Comparison of growth performance SpanJAgricRes_016_0505_2018 PDF.pdf.jpg
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TEXT
100 Comparison of growth performance SpanJAgricRes_016_0505_2018 PDF.pdf.txt
100 Comparison of growth performance SpanJAgricRes_016_0505_2018 PDF.pdf.txt
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100 Comparison of growth performance SpanJAgricRes_016_0505_2018 PDF.pdf
100 Comparison of growth performance SpanJAgricRes_016_0505_2018 PDF.pdf
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10612/10732
oai:buleria.unileon.es:10612/10732
2020-12-10 10:02:43.154
BULERIA. Repositorio Institucional de la Universidad de León
buleria@unileon.es
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