Quercetin Application for Common Carp (Cyprinus carpio): I. Effects on Growth Performance, Humoral Immunity, Antioxidant Status, Immune-Related Genes, and Resistance against Heat Stress

Abstract

This study was done to evaluate the effect of different quercetin levels on growth performance, immune responses, antioxidant status, serum biochemical factors, and high-temperature stress responses in common carp (Cyprinus carpio). A total number of 216 common carp with an average weight of 27.21 ± 53 g were divided into 12 tanks ( four treatments × three replications ) and fed 0 mg/kg quercetin (T0), 200 mg/kg quercetin (T1), 400 mg/kg quercetin (T2), and 600 mg/kg quercetin (T3) for 60 days. There were significant differences in growth performance, and the highest final body weight (FBW), weight gain (WG), specific growth rate (SGR), and feed intake (FI) were observed in T2 and T3 ( P < 0.05 ). Different quercetin levels significantly increased complement pathway activity (ACH50) and lysozyme activity both before and after heat stress ( P < 0.05 ). Catalase (CAT), glutathione peroxidase (GPx), and malondialdehyde (MDA) were significantly increased in fish exposed to heat stress, but fish fed with a supplemented diet with quercetin showed the lowest levels both before and after heat stress ( P < 0.05 ). Superoxide dismutase (SOD) levels were significantly enhanced in fish fed diets supplemented with quercetin in both phases ( P < 0.05 ). Different quercetin levels led to a significant decrease in alanine aminotransferase (ALT) and aspartate aminotransferase (AST) before and after the challenging test ( P < 0.05 ). Glucose and cortisol levels were significantly higher in the control group compared to the other treatments in both phases ( P < 0.05 ). The expression of glutathione peroxidase (GPx) and lysozyme was markedly upregulated in fish fed with quercetin-supplemented diets ( P < 0.05 ). No marked effects were observed for growth hormone (GR) and interleukin-8 (IL8) ( P > 0.05 ). In conclusion, dietary quercetin supplementations (400-600 mg/kg quercetin) improved growth performance, immunity, and antioxidant status and increased tolerance to heat stress.

Effect of Scoparia dulcis Extract on Lipid Oxidation in Fish Feed, Growth Performance, and Hypoxia Tolerance in Juvenile Jian Carp (Cyprinus carpio var. Jian)

“…•− and catalyze it to H 2 O 2 and the dioxygen molecules [46]. Subsequently, H 2 O 2 is catalyzed by CAT and GPx [49]. In this study, dietary AE supplementation increased activities of CAT and GPx in the hepatopancreas and intestine, indicates that dietary AE improved fish antioxidant capacity.…”

Acute Thermal Stress Reduces Skeletal Muscle Growth and Quality in Gibel Carp (Carassius gibelio)

“…Some studies in zebrafish embryos found that acute extreme temperature treatment, whether low or high temperature, resulted in reduced aerobic performance and thermal sensitivity and a switch in muscle fibre type [16,17]. In a breeding trial with a heat stressor, it was found that the growth performance of Cyprinus carpio was significantly reduced after 60 days [18]. Cyprznus carpzo L. had the smoothest heart rate and metabolic frequency at 19.0 • C and, in the rest of the temperature conditions, both warming and cooling, sharp changes in heart rate and metabolic frequency were exhibited [19].…”