Effects of dietary surfactin supplementation on growth performance, intestinal digestive enzymes activities and some serum biochemical parameters of tilapia (Oreochromis niloticus) fingerlings

Abstract

This trial was conducted to investigate the effects of supplementary surfactin on growth performance, intestinal digestive enzymes activities and some serum biochemical parameters of tilapia (Oreochromis niloticus) fingerlings. Three hundred and twenty fish were randomly divided into four treatment groups with four replicates in each group and 20 fish in each replicate. The dietary surfactin levels of four treatment groups were 0 (control group), 50, 100 and 200 mg/kg. The trial period was 7 weeks. Compared with the control group, final body weight, daily feed intake, weight gain rate, feed conversion ratio and protein efficiency ratio were improved significantly by surfactin supplementation (p < 0.05). No significant differences of survival rate were found between the control group and all surfactin supplementation groups (p > 0.05). The activities of protease and lipase in intestine of surfactin supplementation groups were significantly higher than those of the control group (p < 0.05), the amylase activities were similar among all treatment groups (p > 0.05). The activities of aspartate aminotransferase and alanine aminotransferase were decreased significantly by dietary surfactin supplementation (p < 0.05), the levels of blood urea nitrogen, triglyceride, total cholesterol and low-density lipoprotein cholesterol were also decreased significantly (p < 0.05), while lysozyme activity and the high-density lipoprotein cholesterol level were increased significantly by the surfactin supplementation (p < 0.05). In conclusion, we demonstrated a promotion of growth performance and improvement of intestinal digestive enzymes activities and some serum biochemical parameters of tilapia fingerlings by dietary surfactin supplementation.ARTICLE HISTORY

Quercetin decreases the triglyceride content through the PPAR signalling pathway in primary hepatocytes of broiler chickens

“…Quesada et al [21] reported that grapeseed procyanidin extract (GSPE) treatment slightly lowered the content of TG and CHO in rat livers. Moreover, Zhai et al [23] reported that quercetin decreased the serum TG content in tilapia (freshwater fish), which may be helpful for avoiding pathological changes of fatty liver. Kuipers et al [24] also reported that quercetin decreased the plasma TG level of 9week-old mice.…”

Influences of dietary antimicrobial peptide APSH‐07 on the growth performance, immune response and vibriosis resistance of abaloneHaliotis discus hannaiIno

“…Bi (2018) revealed that the antimicrobial peptides produced by Bacillus subtilis mutHS-301 had stable bacteriostatic activity against V. parahaemolyticus. Zhai et al, 2016 In addition, in the present study, excessive supplementation of dietary antimicrobial peptide APSH-07 (22.5 mg/kg) had significantly negative effects on the growth, immune and antioxidation responses and the disease resistance of abalone to V. parahaemolyticus. Similar results were found in previous studies in yellow catfish Pelteobagrus fulvidraco (Chen et al, 2007), common carp (Dong et al, 2019) and tilapia (Zhai et al, 2016).…”

“…Apart from interacting directly with pathogens and breaking down cell membranes by interacting with certain bacterial components (Chou, Wen, Kuo, Lin, & Chen, 2010), antimicrobial peptides also play a role by modulating the adaptive immune response (Chou et al., 2010; Liu et al., 2018; Lu, 2018; Oppenheim, Biragyn, Kwak, & Yang, 2003) or acting as chemokines to recruit other effector cells (Chertov et al., 1996). In addition, some beneficial effects of antimicrobial peptides on growth performance and non‐specific immunity have been reported in aquaculture animals, such as shrimp Litopenaeus vannamei and tilapia ( Oreochromis niloticus × O. aureus , and O. niloticus ) (Shi et al., 2014; Xin et al, 2015; Zhai, Shi, & Chen, 2016).…”

Chemical structure, properties and potential applications of surfactin, as well as advanced strategies for improving its microbial production

“…In a recent study, the metabolite surfactin produced by B. subtilis was shown to be effective in improving growth performance, alleviating expression of intestinal inflammatory genes and having a regulatory effect on the intestinal microbiota in broilers [48] . In addition, the addition of antibacterial peptide surfactin to tilapia ( Oreochromis niloticus ) feed can improve intestinal health by increasing the height of intestinal folds, regulating intestinal flora and increasing intestinal antioxidant capacity [49] . A class of widely used lipopeptides (fengycins) produced by Bacillus has been shown to eliminate Staphylococcus aureus colonizing the human gut by inhibiting population sensing, a process by which bacteria respond to their population density by altering their genetic regulation [50] .…”