Effects of heat stress on growth performance, selected physiological and immunological parameters, caecal microflora, and meat quality in two broiler strains
Objective: This study was conducted to investigate the effects of normal and heat stress environments on growth performance and, selected physiological and immunological parameters, caecal microflora and meat quality in Cobb 500 and Ross 308 broilers. Methods: One-hundred-and-twenty male broiler ch...
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| Format: | Article |
| Language: | English |
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Asian-Australasian Association of Animal Production Societies
2020
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| Online Access: | http://psasir.upm.edu.my/id/eprint/88707/ http://psasir.upm.edu.my/id/eprint/88707/1/BROI.pdf |
| _version_ | 1848860677596250112 |
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| author | Awad, Elmutaz Atta Muhamad, Najaa Zainool Abidin, Zulaikha Idrus, Zulkifli Soleimani Farjam, Abdoreza |
| author_facet | Awad, Elmutaz Atta Muhamad, Najaa Zainool Abidin, Zulaikha Idrus, Zulkifli Soleimani Farjam, Abdoreza |
| author_sort | Awad, Elmutaz Atta |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Objective: This study was conducted to investigate the effects of normal and heat stress environments on growth performance and, selected physiological and immunological parameters, caecal microflora and meat quality in Cobb 500 and Ross 308 broilers.
Methods: One-hundred-and-twenty male broiler chicks from each strain (one-day-old) were randomly assigned in groups of 10 to 24 battery cages. Ambient temperature on day (d) 1 was set at 32°C and gradually reduced to 23°C on d 21. From d 22 to 35, equal numbers of birds from each strain were exposed to a temperature of either 23°C throughout (normal) or 34°C for 6 h (heat stress).
Results: From d 1 to 21, strain had no effect (p>0.05) on feed intake (FI), body weight gain (BWG), or the feed conversion ratio (FCR). Except for creatine kinase, no strain×temperature interactions were observed for all the parameters measured. Regardless of strain, heat exposure significantly (p<0.05) reduced FI and BWG (d 22 to 35 and 1 to 35), immunoglobulin Y (IgY) and IgM, while increased FCR (d 22 to 35 and 1 to 35) and serum levels of glucose and acute phase proteins (APPs). Regardless of temperature, the Ross 308 birds had significantly (p<0.05) lower IgA and higher finisher and overall BWG compared to Cobb 500. Conclusion: The present study suggests that the detrimental effects of heat stress are consistent across commercial broiler strains because there were no significant strain×temperature interactions for growth performance, serum APPs and immunoglobulin responses, meat quality, and ceacal microflora population. |
| first_indexed | 2025-11-15T12:49:02Z |
| format | Article |
| id | upm-88707 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T12:49:02Z |
| publishDate | 2020 |
| publisher | Asian-Australasian Association of Animal Production Societies |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-887072021-10-07T01:18:48Z http://psasir.upm.edu.my/id/eprint/88707/ Effects of heat stress on growth performance, selected physiological and immunological parameters, caecal microflora, and meat quality in two broiler strains Awad, Elmutaz Atta Muhamad, Najaa Zainool Abidin, Zulaikha Idrus, Zulkifli Soleimani Farjam, Abdoreza Objective: This study was conducted to investigate the effects of normal and heat stress environments on growth performance and, selected physiological and immunological parameters, caecal microflora and meat quality in Cobb 500 and Ross 308 broilers. Methods: One-hundred-and-twenty male broiler chicks from each strain (one-day-old) were randomly assigned in groups of 10 to 24 battery cages. Ambient temperature on day (d) 1 was set at 32°C and gradually reduced to 23°C on d 21. From d 22 to 35, equal numbers of birds from each strain were exposed to a temperature of either 23°C throughout (normal) or 34°C for 6 h (heat stress). Results: From d 1 to 21, strain had no effect (p>0.05) on feed intake (FI), body weight gain (BWG), or the feed conversion ratio (FCR). Except for creatine kinase, no strain×temperature interactions were observed for all the parameters measured. Regardless of strain, heat exposure significantly (p<0.05) reduced FI and BWG (d 22 to 35 and 1 to 35), immunoglobulin Y (IgY) and IgM, while increased FCR (d 22 to 35 and 1 to 35) and serum levels of glucose and acute phase proteins (APPs). Regardless of temperature, the Ross 308 birds had significantly (p<0.05) lower IgA and higher finisher and overall BWG compared to Cobb 500. Conclusion: The present study suggests that the detrimental effects of heat stress are consistent across commercial broiler strains because there were no significant strain×temperature interactions for growth performance, serum APPs and immunoglobulin responses, meat quality, and ceacal microflora population. Asian-Australasian Association of Animal Production Societies 2020 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/88707/1/BROI.pdf Awad, Elmutaz Atta and Muhamad, Najaa and Zainool Abidin, Zulaikha and Idrus, Zulkifli and Soleimani Farjam, Abdoreza (2020) Effects of heat stress on growth performance, selected physiological and immunological parameters, caecal microflora, and meat quality in two broiler strains. Asian-Australasian Journal of Animal Sciences, 33 (5). 778 - 787. ISSN 1011-2367 https://www.animbiosci.org/journal/view.php?doi=10.5713/ajas.19.0208 10.5713/ajas.19.0208 |
| spellingShingle | Awad, Elmutaz Atta Muhamad, Najaa Zainool Abidin, Zulaikha Idrus, Zulkifli Soleimani Farjam, Abdoreza Effects of heat stress on growth performance, selected physiological and immunological parameters, caecal microflora, and meat quality in two broiler strains |
| title | Effects of heat stress on growth performance, selected physiological and immunological parameters, caecal microflora, and meat quality in two broiler strains |
| title_full | Effects of heat stress on growth performance, selected physiological and immunological parameters, caecal microflora, and meat quality in two broiler strains |
| title_fullStr | Effects of heat stress on growth performance, selected physiological and immunological parameters, caecal microflora, and meat quality in two broiler strains |
| title_full_unstemmed | Effects of heat stress on growth performance, selected physiological and immunological parameters, caecal microflora, and meat quality in two broiler strains |
| title_short | Effects of heat stress on growth performance, selected physiological and immunological parameters, caecal microflora, and meat quality in two broiler strains |
| title_sort | effects of heat stress on growth performance, selected physiological and immunological parameters, caecal microflora, and meat quality in two broiler strains |
| url | http://psasir.upm.edu.my/id/eprint/88707/ http://psasir.upm.edu.my/id/eprint/88707/ http://psasir.upm.edu.my/id/eprint/88707/ http://psasir.upm.edu.my/id/eprint/88707/1/BROI.pdf |