Effect of Environmental Heat Stress on Performance and Carcass Yield of Broiler Chicks

Yousaf, Adnan; Jabbar, Adnan Abdul; Rajput, Nasir Ahmed; Memon, Azizullah; Shahnawaz, Rehana; Mukhtar, Nasir; Farooq, Farhan; Abbas, Muhammad; Khalil, Rabia

doi:10.36380/scil.2019.wvj4

Cited by 9 publications

(9 citation statements)

References 12 publications

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“…Moreover, Sandikci et al (44) and Sohail et al (45,46) reported that probiotics have no effect on the growth of the broilers stressed with heat. On the other side, the results of the high temperature on some carcass traits of broilers are consistent with those of Yousaf et al (47) who reported that heat stress has deleterious effects on the carcass traits of broiler Ross-308 chicken. Moreover, Ohtsu et al (48) recorded the negative impact of thermal temperature on immune system organs such as the spleen, which atrophied in broilers by thermal temperature.…”

Section: Discussionsupporting

confidence: 90%

Impact of Dietary or Drinking Water Ruminococcus sp. Supplementation and/or Heat Stress on Growth, Histopathology, and Bursal Gene Expression of Broilers

et al. 2021

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This research was conducted to evaluate the impact of dietary or drinking water Ruminococcus sp. supplementation and/or heat stress (HS) on the growth, serum biochemistry, tissue antioxidant, phagocytic assay, histopathology, and bursa gene expression of broilers. Day-old broiler chicks were allotted into six groups according to HS and/or Ruminococcus with or without enzyme supplementation. The first group was the control one, with a formulated diet and normal environmental temperature but without any supplement. The second group fed on Ruminococcus-supplemented diet (1 kg/kg diet). The third group fed on a formulated diet without supplement, and Ruminococcus and digestive enzymes were given in drinking water (0.1 ml/L). The fourth one was the heat stress group, with a normal formulated diet. The fifth and the sixth groups served as second and third groups, respectively, but with heat stress. The results of this experiment indicated that thermal temperature negatively affected the parameters of growth performance, serum biochemical, tissue antioxidants, and phagocytic assay. Moreover, heat stress led to pathological lesions in the internal organs and affected the expression of some genes related to heat stress, including proapoptotic genes such as caspase8 and bax, inflammatory genes such as NF-κβ1, and heat shock protein such as HSP 70 in the bursal tissue. These bad effects and abnormalities were mitigated by Ruminococcus alone or with enzyme supplementation, which improved all the above-mentioned parameters.

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Section: Discussionsupporting

confidence: 90%

Impact of Dietary or Drinking Water Ruminococcus sp. Supplementation and/or Heat Stress on Growth, Histopathology, and Bursal Gene Expression of Broilers

et al. 2021

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“…The environmental and air quality variables (temperature, Tbs; relative humidity, RH; air velocity, Var; ammonia, NH 3 ; and carbon dioxide, CO 2 ) were considered dependent variables, and the response variable was estimated as the performance of the broilers in each breeding period (21, 28, 35 and 42 days of growth). The ideal rearing conditions were considered, according to the current literature (Yahav, 2000, Yahav et al, 2001Nääs et al, 2010;Quinteiro-Filho et al, 2012;Yousaf et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

“…The ideal conditions of air temperature and relative humidity for broiler chickens rearing throughout the growth allows the best performance. In current literature (Yahav, 2000;Quinteiro-Filho et al, 2012;Olfati et al, 2018;Yousaf et al, 2019), authors state the importance of maintaining the proper thermoneutral zone for allowing the birds to avoid heat or cold stress according to the stage of growth. Such conditions demand the use of controlled environmental systems tuned to the age of the broilers.…”

Section: Introductionmentioning

confidence: 99%

Optimization Algorithm Applied to Environmental Control in Broiler Houses

Benvenga

Nääs

Lima

et al. 2020

Braz. J. Poult. Sci.

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The present study aimed to apply the Simulated Annealing (SA) optimization algorithm to find the ideal control of broiler housing rearing environment at 21, 28, 35, and 42 days of growth. Data from four types of houses using environmental control and similar flock density were recorded weekly in the morning and afternoon, during two seasons (summer and winter). The variables related to environmental and air quality data (temperature, relative humidity, air velocity, ammonia, and carbon dioxide concentrations) were registered and organized into the database to provide a descriptive analysis. The ideal rearing conditions were established as a goal, and we used the Simulated Annealing optimization algorithm to process the data. Such an approach may be applied in the cases that the ideal condition of optimization has multiple objectives, and when each variable is the result of a process. The model was implemented considering the optimal controlled environmental condition that depends on the age of broilers. Results indicated that there was a large dispersion of the data collected from the environmental variables. The process suggested that the optimized functions lead to absolute values obtained by the algorithm for each of the environmental factors of the controlled environmental system, representing the optimal condition of the environment found for each broiler age, considering the interactions of the variables. The maximum optimization was prominent to 21 and 35-d old birds, representing 40-48% of the improvement of the process. 28 and 42-d old birds might benefit from the controlled environmental optimization process by up to 30%.

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“…Broilers are thermophilic, with a body temperature of approximately 41°C. Being different from other animals, birds do not have sweat glands for releasing body heat; therefore, they release heat through breathing (i.e., panting) ( Yousaf et al., 2019 ). Thus, birds are susceptible to high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Early heat exposure effect on the heat shock proteins in broilers under acute heat stress

Kang

Shim

2021

Poultry Science

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The effects of early heat conditioning on the acute heat stress response in broilers were investigated via the growth performance, dopamine, serotonin, and corticosterone and the expression of heat shock proteins ( HSP ) and heat shock factors. One-day-old chicks (n = 144) were divided into 3 groups in a 35-d experiment (48 chicks per each group). Group 1 ( C ) was treated with an optimum temperature, group 2 ( CH ) was treated with 40°C ± 1°C on day 35 (5 h), and group 3 ( HH ) was treated with 40°C ± 1°C on day 5 (24 h) and day 35 (5 h). On day 7, the body weight gain was lower ( P < 0.05) in HH than in C and CH. On day 35, the heat-treated groups (CH and HH) had lower weight gains than the C group ( P < 0.05), whereas the feed conversion ratio was lower in HH ( P < 0.05). Serum corticosterone was higher in CH than in C, but HH and C did not differ ( P < 0.05). Liver HSP70 protein expression was higher in CH than HH and C ( P < 0.05), which did not differ, and HSP40 protein expression was higher in CH than C ( P < 0.05). These results suggest that early heat conditioning may reduce acute heat stress on broiler.

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Effect of Environmental Heat Stress on Performance and Carcass Yield of Broiler Chicks

Cited by 9 publications

References 12 publications

Impact of Dietary or Drinking Water Ruminococcus sp. Supplementation and/or Heat Stress on Growth, Histopathology, and Bursal Gene Expression of Broilers

Impact of Dietary or Drinking Water Ruminococcus sp. Supplementation and/or Heat Stress on Growth, Histopathology, and Bursal Gene Expression of Broilers

Optimization Algorithm Applied to Environmental Control in Broiler Houses

Early heat exposure effect on the heat shock proteins in broilers under acute heat stress

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