Effects of Phytosterol on Growth Performance, Serum Lipid Metabolism Indicators and Hepatopancreas Antioxidant Indicators of Tilapia (Oreochromis niloticus)

LI Zhihua; HUANG Zhiyi; PAN Zhongchao; SUN Fenggang; ZHAO Huihong

doi:10.3969/j.issn.1006-267x.2019.12.052

2019 , Vol. 31 >Issue 12: 5866 - 5872

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.12.052

Effects of Phytosterol on Growth Performance, Serum Lipid Metabolism Indicators and Hepatopancreas Antioxidant Indicators of Tilapia (Oreochromis niloticus)

LI Zhihua ,
HUANG Zhiyi ,
PAN Zhongchao ,
SUN Fenggang ,
ZHAO Huihong

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1. Guangdong Weilai Biotechnology Co., Ltd., Guangzhou 511400, China;
2. College of Oceanography, South China Agricultural University, Guangzhou 510000, China

Received date: 2019-06-14

Online published: 2019-12-13

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Abstract

This experiment was conducted to study the effects of phytosterol on growth performance, serum lipid metabolism indicators and hepatopancreas antioxidant indicators of tilapia (Oreochromis niloticus). Three hundred and sixty genetically improved farmed tilapia with an average body weight of (39.25±1.56) g were randomly allotted to four groups with three replicates of each 30 individuals and fed basal diet supplemented with 0 (Ll group, as control group), 20 (L2 group), 40 (L3 group), and 160 mg/kg (L4 group) phytosterol for 60 days, respectively. The results showed as follows:1) compared with the L1 group, the weight gain rate (WGR) and specific growth rate (SGR) of tilapia in the L2 and L3 groups were significantly elevated (P<0.05), and the feed conversion rate (FCR) in the L2, L3 and L4 groups was significantly decreased (P<0.05), the best effects were found in the L2 group. 2) Diet supplemented different levels of phytosterol significantly decreased the muscle ash content of tilapia (P<0.05), but had no significant difference in muscle moisture, crude protein and crude fat contents (P>0.05). 3) Compared with the L1 group, the serum total cholesterol (TC), triglycerides (TG) and low-density lipoprotein cholesterol (LDLC) contents of tilapia in the L2, L3 and L4 groups were significantly decreased (P<0.05). 4) The hepatopancreas superoxide dismutase (SOD) activity in the L2 and L3 groups was higher significantly than that in the L1 and L4 groups (P<0.05), while the hepatopancreas catalase activity and malondialdehyde content in the L2 and L3 groups had no significant differences compared with the L1 and L4 groups (P>0.05). In conclusion, phytosterol is added in a proper amount in the diet can enhance the growth, decrease serum lipid contents, and has a certain positive effect on improving the hepatopancreas antioxidant ability of tilapia. Under the present experimental conditions, when adding 20 mg/kg phytosterol into the artificial compound feed, tilapia has the best growth performance.

Key words： phytosterol; tilapia (Oreochromis niloticus); growth performance; lipid metabolism; antioxidant

Cite this article

LI Zhihua , HUANG Zhiyi , PAN Zhongchao , SUN Fenggang , ZHAO Huihong . Effects of Phytosterol on Growth Performance, Serum Lipid Metabolism Indicators and Hepatopancreas Antioxidant Indicators of Tilapia (Oreochromis niloticus)[J]. Chinese Journal of Animal Nutrition, 2019 , 31(12) : 5866 -5872 . DOI: 10.3969/j.issn.1006-267x.2019.12.052

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