Dietary Folic Acid Requirement for Juvenile Golden Pompano (Trachinotus ovatus)

HUANG Qianqian; LIN Heizhao; HUANG Zhong; ZHOU Chuanpeng; YU Wei; XUN Pengwei; YANG Yukai; HUANG Xiaolin; WANG Jun; WANG Yun

doi:10.3969/j.issn.1006-267x.2019.09.027

Chinese Journal of Animal Nutrition >

2019 , Vol. 31 >Issue 9: 4152 - 4161

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.09.027

Dietary Folic Acid Requirement for Juvenile Golden Pompano (Trachinotus ovatus)

HUANG Qianqian ,
LIN Heizhao ,
HUANG Zhong ,
ZHOU Chuanpeng ,
YU Wei ,
XUN Pengwei ,
YANG Yukai ,
HUANG Xiaolin ,
WANG Jun ,
WANG Yun

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1. Key Lab of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;
2. College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201506, China;
3. Shenzhen Base of South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shenzhen 518121, China

Received date: 2019-03-26

Online published: 2019-09-17

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Abstract

This experiment was conducted to investigate the effects of dietary foilc acid levels on growth performance, body composition, serum biochemical and immune indices, liver antioxidant indices and folic acid accumulation of juvenile golden pompano (Trachinotus ovatus), and to determine the foilc acid requirement for juvenile golden pompano. A total of 525 healthy juvenile golden pompano with initial body weight of (7.77±0.10) g were selected and randomly divided into 7 groups with 3 replicates per group and 25 fish per replicate. Fish in the 7 groups were fed the experimental diets which contained 0.31 (control), 0.94, 1.76, 2.83, 4.20, 5.69 and 6.32 mg/kg folic acid, respectively. The experiment lasted for 8 weeks. The results showed as follows:1) the weight gain rate and specific growth rate of 4.20 mg/kg group were significantly higher than those of the control group (P<0.05), while the feed conversion ratio was significantly lower than that of the control group (P<0.05). 2) The serum total cholesterol content of 1.76 mg/kg group was significantly lower than that of the control group (P<0.05), and the serum triglyceride content of 5.69 mg/kg group was significantly lower than that of the control group (P<0.05). 3) The serum lysozyme activity of 1.76, 2.83, 4.20, 5.69 and 6.32 mg/kg groups was significantly higher than that of the control group (P<0.05), and the contents of complement 3 and complement 4 in serum of 2.83, 4.20, 5.69 and 6.32 mg/kg groups were significantly higher than those of the control group (P<0.05). 4) The liver total antioxidant capacity and catalase activity of 0.94, 1.76, 2.83, 4.20, 5.69 and 6.32 mg/kg groups were significantly higher than those of the control group (P<0.05), and the liver folic acid accumulation of 0.94, 1.76, 2.83, 4.20, 5.69 and 6.32 mg/kg groups was significantly higher than that of the control group (P<0.05). In conclusion, dietary suitable folic acid level can improve the growth performance, enhance the body immunity and antioxidant capacity. Quadratic regression analysis of the weight gain rate and liver folic acid accumulation indicate that the dietary folic acid requirement of juvenile golden pompano is 4.53 and 4.94 mg/kg, respectively.

Key words： Trachinotus ovatus; folic acid; growth performance; liver antioxidant capacity; requirement

Cite this article

HUANG Qianqian , LIN Heizhao , HUANG Zhong , ZHOU Chuanpeng , YU Wei , XUN Pengwei , YANG Yukai , HUANG Xiaolin , WANG Jun , WANG Yun . Dietary Folic Acid Requirement for Juvenile Golden Pompano (Trachinotus ovatus)[J]. Chinese Journal of Animal Nutrition, 2019 , 31(9) : 4152 -4161 . DOI: 10.3969/j.issn.1006-267x.2019.09.027

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