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Effects of Dietary Proanthocyanidins Supplementation on Growth Performance, Digestive Enzymes Activities and Microbiota in the Intestine of Juvenile American Eels (Anguilla rostrata) Cultured in Cement Tanks
|dc.description.abstract||This trial was conducted to investigate the effects of proanthocyanidins (PACs) on the growth performance, digestive enzymes activities and microbiota in the intestines of juvenile American eels (Anguilla rostrata) cultured in cement tanks. Six cement tanks stocked with similar fish size and weight (about 120 g/fish and 2116 kg/tank) were randomly divided into a control group fed with a commercial diet and a PACs group fed with a commercial diet supplemented 400 mg/kg PACs, with three replicates in each group. The trial period lasted 60 days. The finial fish weight and weight gain rate were significantly improved by PACs supplementation (P<0.05). There were no significant differences in feed efficiency and feeding rate between the control group and PACs group (P>0.05). Activities of protease in intestines were significantly enhanced by PACs supplementation (P<0.05), however dietary PACs supplementation had no significant effect on the activities of amylase and lipase (P>0.05). Furthermore, dietary PACs supplementation increased the richness and decrease the diversity of intestinal microbiota. At the phylum level, the higher relative abundance of Proteobacteria and the lower relative abundances of Firmicutes and Actinobacteria were found in PACs group compared to control group. At the genus level, PACs supplemented in diet significantly increased the relative abundances of Candidatus Arthromitus, Paracoccus and Eubacterium hallii (P>0.05). In conclusion, dietary 400 mg/kg PACs supplementation improved growth performance and activity of protease in intestine, and modulate intestinal microbiota of juvenile American eel cultured in cement tanks.|
|dc.relation.ispartof||The Israeli Journal of Aquaculture - Bamidgeh|
|dc.title||Effects of Dietary Proanthocyanidins Supplementation on Growth Performance, Digestive Enzymes Activities and Microbiota in the Intestine of Juvenile American Eels (Anguilla rostrata) Cultured in Cement Tanks|
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Volume 72, 2020|
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