Effects of Ethanol Extract from Chlorella vulgaris on Growth Performance, Body Composition, Digestive Enzyme Activities and Serum Biochemical and Antioxidant Indices of Juvenile Pelteobagrus vachelli

  • HUANG Wenqing ,
  • SUN Yuping ,
  • WANG Guoxia ,
  • WANG Suitao ,
  • MO Wenyan ,
  • CHEN Xiaoying ,
  • ZHANG Yongliang ,
  • HUANG Yanhua ,
  • LIAO Yuhang
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  • 1. Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science in South China of Ministry of Agriculture, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou 510640, China;
    2. College of Animal Science, South China Agricultural University, Guangzhou 510640, China;
    3. Guangzhou Fishtech Biological Technology Co. Ltd., Guangzhou 510640, China;
    4. Zhongkai University of Agriculture and Engineering, Guangzhou 510550, China

Received date: 2019-10-08

  Online published: 2020-04-16

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Abstract

This experiment was conducted to study the effects of dietary different supplemental levels of ethanol extract from Chlorella vulgaris (EEFCV) on growth performance, body composition, digestive enzymes activities and serum biochemical and antioxidant indices of juvenile Pelteobagrus vachelli. A total of 540 juvenile Pelteobagrus vachelli with initial body weight of 1.85 g were randomly divided into 6 groups with 3 replicates per group and 30 fish per replicate, and fed six isonitrogenous and isolipidic diets supplemented with 0 (T0 group), 0.25% (T1 group), 0.50% (T2 group), 1.00% (T3 group), 1.50% (T4 group) and 2.50% (T5 group) EEFCV, respectively. The feeding trail lasted for 56 days. The results showed as follows:1) the final average weight, weight gain rate and specific growth rate of T4 and T5 groups were significantly higher than those of T0 group (P<0.05), and the feed coefficient of T4 and T5 groups was significantly lower than that of T0 group (P<0.05). There were no significant differences in the survival rate, condition factor, viscerosomatic index and hepatosomatic index among all groups (P>0.05). There were no significant differences in the contents of crude protein and ash among all groups (P>0.05). The ether extract content of T5 group was significantly higher than that of T0 group (P<0.05), and the moisture content of T5 group was significantly lower than that of T0 group (P<0.05). 3) There were no significant differences in the activities of protease, amylase and lipase in stomach, intestine and liver among all groups (P>0.05). 4) There were no significant differences in the alanine transaminase and aspartate aminotransferase activities and cholesterol, triglyceride, urea nitrogen, glucose and total protein contents in serum among all groups (P>0.05). The serum aspartate aminotransferase activity of T1, T3 and T4 groups was significantly higher than that of T0 group (P<0.05). 5) The serum malondialdehyde content of T4 groups was significantly lower than that of T0 group (P<0.05), and the serum superoxide dismutase activity of T3, T4 and T5 group was significantly higher than that of T0 group (P<0.05). There was no significant difference in the serum total antioxidant capacity among all groups (P>0.05). In conclusion, dietary EEFCV supplementation has promoting effects on the growth performance and antioxidant capacity of juvenile Pelteobagrus vachelli, using weight gain rate, specific growth rate and feed coefficient as the main evaluation indices, dietary supplemented with 1.50% EEFCV has better application effects.

Cite this article

HUANG Wenqing , SUN Yuping , WANG Guoxia , WANG Suitao , MO Wenyan , CHEN Xiaoying , ZHANG Yongliang , HUANG Yanhua , LIAO Yuhang . Effects of Ethanol Extract from Chlorella vulgaris on Growth Performance, Body Composition, Digestive Enzyme Activities and Serum Biochemical and Antioxidant Indices of Juvenile Pelteobagrus vachelli[J]. Chinese Journal of Animal Nutrition, 2020 , 32(4) : 1778 -1787 . DOI: 10.3969/j.issn.1006-267x.2020.04.036

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