Effects of feeding strategies on growth，body composition, intestine digestive enzymes activities and intestine histology of Megalobrama pellegrini (Tchang, 1930) early juveniles raised in flow-through system

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dc.contributor.author Qu, Huantoao
dc.contributor.author Chen, Lei
dc.contributor.author Yang, Jinyuan
dc.contributor.author Liao, Jianxin
dc.contributor.author Wei, Dai
dc.contributor.author Lu, Xuebao
dc.date.accessioned 2021-03-29T17:31:49Z
dc.date.available 2021-03-29T17:31:49Z
dc.date.issued 2020
dc.description.abstract To determine the effects of feeding rate and feeding frequency on growth performance, digestive enzymes activities, and intestine development of Megalobrama pellegrini in a replicated flow-through system, we conducted a 42-day experiment. We designed three feeding rates (5%, 6.5%, and 8% body weight/day, BW/d) and two feeding frequencies (2 and 3 meals/day; m/d) in this experiment. Fish (0.57 ± 0.01 g) were distributed into 18 tanks with 70 individuals and fed with a commercial diet (33% crude protein, 4% total lipid). Results showed that the highest weight gain was found in the fish fed diet with 6.5% BW/day and 3 m/d, which was significantly higher in comparison with that of other feeding rate groups (5% BW/d and 6.5% BW/d) at both feeding frequency (2 and 3 m/d). Fish growth performance was significantly affected by the feeding rate but not by the feeding frequency. The significantly higher feed conversion ratio (FCR) was recorded at 8% BW/d with 3 m/d than other treatments. Furthermore, fish fed diet at 8% BW/d with 2 m/d had significantly high mortality during the middle of this trial. In contrast, we found that other fish groups' survival rates were higher (over 90%), and there were no significant differences among them. We saw a significantly lower whole-body crude protein, lipid, and intestinal digestive enzymes in fish fed at a ratio of 8% BW/d with 3 m/d compared with other treatments. Moreover, our findings revealed intestinal villi fusion and exfoliation in this group compared with other treatments. In conclusion, the Megalobrama pellegrini received a feeding rate of 6.5% BW/d, and a feeding frequency of 2 m/d may be the optimum feeding regime for raising Megalobrama pellegrini in a flow-through system.
dc.format.extent 9 pages
dc.identifier.doi https://doi.org/10.46989/001c.21644
dc.identifier.issn 0792-156X
dc.identifier.uri http://hdl.handle.net/10524/63812
dc.relation.ispartof The Israeli Journal of Aquaculture - Bamidgeh
dc.subject megalobrama
dc.subject feeding rate
dc.subject feeding frequency
dc.subject growth perfomance
dc.subject intestinal histology
dc.subject carp
dc.subject bream
dc.subject megalobrama pellegrini
dc.subject body composition
dc.subject digestive enzymes
dc.title Effects of feeding strategies on growth，body composition, intestine digestive enzymes activities and intestine histology of Megalobrama pellegrini (Tchang, 1930) early juveniles raised in flow-through system
dc.type Article
dc.type.dcmi Text
prism.volume 72
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