2018
DOI: 10.1002/jsfa.8971
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Effects of chronic heat exposure on growth performance, intestinal epithelial histology, appetite‐related hormones and genes expression in broilers

Abstract: Chronic heat exposure impairs the performance, intestinal morphology and appetite, which may be correlated with the increased secretion or gene expression of appetite-related hormones and genes, and the higher expression of nutrient-sensing receptors (T1R1 and T1R3) in broilers. © 2018 Society of Chemical Industry.

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Cited by 101 publications
(78 citation statements)
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“…Heat stress has a significant impact on the systems of broiler chickens' bodies because it severely affected the growth, metabolism, digestive system, and the general physiology of the birds ( Lara and Rostagno, 2013 ) and caused changes in the proportions of circulating leucocyte components and blood chemistry ( Abbas et al., 2017 ). Heat stress may lead to intestinal damage because it was reported to decrease jejunal weight and length, villus height, and increase intestinal crypt depth in broilers ( Garriga et al., 2006 , Quinteiro-Filho et al., 2010 , Song et al., 2014 , Abdelqader and Al-Fataftah, 2016 , He et al., 2018 ). Moreover, heat stress affects the activities of digestive enzymes and reduces the digestibility of carbohydrates, lipids, and proteins ( Hai et al., 2000 , Routman et al., 2003 , de Souza et al., 2016 , Yi et al., 2016 , Song et al., 2017 , Xiaofang et al., 2018 ).…”
Section: Introductionmentioning
confidence: 99%
“…Heat stress has a significant impact on the systems of broiler chickens' bodies because it severely affected the growth, metabolism, digestive system, and the general physiology of the birds ( Lara and Rostagno, 2013 ) and caused changes in the proportions of circulating leucocyte components and blood chemistry ( Abbas et al., 2017 ). Heat stress may lead to intestinal damage because it was reported to decrease jejunal weight and length, villus height, and increase intestinal crypt depth in broilers ( Garriga et al., 2006 , Quinteiro-Filho et al., 2010 , Song et al., 2014 , Abdelqader and Al-Fataftah, 2016 , He et al., 2018 ). Moreover, heat stress affects the activities of digestive enzymes and reduces the digestibility of carbohydrates, lipids, and proteins ( Hai et al., 2000 , Routman et al., 2003 , de Souza et al., 2016 , Yi et al., 2016 , Song et al., 2017 , Xiaofang et al., 2018 ).…”
Section: Introductionmentioning
confidence: 99%
“…Broilers are already more susceptible to heat stress conditions than red meat species due to their high metabolic rate, extensive amount of feather coverage, and lack of sweat glands ( Loyau et al., 2013 ). High ambient temperatures in broiler production environments can cause a decrease in feed intake ultimately resulting in decreased body weight, increased feed conversion ratios, higher than normal mortality, and weakened gut health ( Cahaner and Lennstra, 1992 , Ahmad and Sarwar, 2006 , Song et al., 2017 , He et al., 2018 ). It is also known that broilers with high or rapid growth rates have a higher sensitivity to increases in temperatures ( Cahaner and Leenstra, 1992 ) making the modern broiler much more prone to issues that may be associated with heat stress ( Song and King, 2015 ).…”
Section: Introductionmentioning
confidence: 99%
“…Warm ambience could unknowingly perform an act termed as thermal manipulation on chickens prior to hatching which is capable of assisting thermotolerance acquisition (Al-Zghoul et al, 2019). Likewise, it is known that poultry are very likely to develop acclimatization when kept under tropical and subtropical climates with over two months of high temperature (He et al, 2018). Therefore, it can be deduced that the chickens in this study did not need deep crypts in their ceca to preserve their villi from potential casualties because they had created such an effective mechanism enabling them to withstand the lengthy HS (Biasato et al, 2018).…”
Section: Resultsmentioning
confidence: 99%
“…The chickens were randomly allocated to two groups (n= 10, respectively), the control (C) group and the treatment (T) group, from day 22 onwards. This starting point was chosen because broilers in the later stage of life have greater sensitivity to high surrounding temperature than the younger birds (He et al, 2018). In that, true experimental design, specifically the post-test-only control group design, was applied.…”
Section: Experimental Designmentioning
confidence: 99%