Characterization of heat stress affecting the growth performance, blood biochemical profile, and redox status in male an
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Characterization of heat stress affecting the growth performance, blood biochemical profile, and redox status in male and female broilers at market age Shaojun He 1
&
Qirun Yin 1 & Yongjie Xiong 1 & Jing Li 1 & Deyi Liu 1
Received: 7 March 2020 / Accepted: 24 September 2020 # Springer Nature B.V. 2020
Abstract This study investigated the effects of acute heat stress (HS), sex, and their interaction on growth performance, serum biochemical and redox status in the later stage broilers. Two hundred 38-day-old Ross 308 chicks were allocated in a factorial arrangement of 2 × 2 (temperatures and sexes) with 5 replicates of 10 bird each. Thermoneutral and heat-stressed broilers were raised at 24 ± 1 °C or 32 ± 1 °C from day 38 to 39, respectively. HS decreased the average daily feed intake (ADFI) and average daily gain (ADG) whereas it increased feed conversion ratio (FCR), rectal temperature (RT), and respiratory rate (RR) in broilers exposed to high temperature for 24 h and 48 h. Moreover, RT, RR, serum glucose, and HDL-C levels increased while triglyceride (TG), total superoxide dismutase (T-SOD), and glutathione peroxidase (GPx) decreased in broilers exposed to high temperature for 12 h. Male broilers had higher final body weight (FBW), ADFI, ADG, total protein carbonyl group, and lower FCR and T-SOD than females in HS condition for 24 h and 48 h. Lower RT, serum albumin, HDL-C, activities of T-SOD and GPx were observed when compared with those of males in HS condition for 12 h. There were significant temperature × sex interactive effects on ADFI, ADG, and TG in broilers exposed to high temperature for 24 h and 48 h. The present study suggests that the acute HS negatively affects growth performance which is accompanied by the disorder of serum nutritional metabolism and imbalance of redox status in later stage broilers. Some parameters presented sexual differences that suggested it may be more effective to alleviate the negative effects of HS when broiler producers take into account the gender of broiler. Keywords Heat stress . Broiler . Growth performance . Biochemical profile . Redox status
Introduction Today, an increasing number of studies show that heat stress (HS) adversely affects poultry industry and constitutes a significant animal welfare challenge, especially in hot and warm regions. The broilers with high growth rate are associated with high metabolic heat production and thus more susceptible to HS than ever before. Some microclimate researchers have predicted more intense, larger, and frequent extreme heat waves in the future due to global warming (Meehl and Tebaldi 2004). Broiler chickens subjected to HS conditions may consequently exhibit many
* Shaojun He [email protected] 1
Anhui Province Key Laboratory of Animal Nutritional Regulation and Health, Anhui Science and Technology University, Chuzhou 233100, Anhui, China
behavioral, physiological, and metabolic changes whose main consequences include high mortality, reduced feed consumption, and less body weight gain (Awad et
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