Optimum selenium requirement of juvenile Nile tilapia, Oreochromis niloticus

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Lijun Ning
  • Yuwen Tan
  • Shuanglong Wu
  • Feng Chen
  • Hao Zhang
  • Qing Pan

Detail(s)

Original languageEnglish
Pages (from-to)528-535
Journal / PublicationAquaculture Nutrition
Volume26
Issue number2
Online published7 Nov 2019
Publication statusPublished - Apr 2020
Externally publishedYes

Abstract

A feeding experiment was conducted to determine the optimum selenium requirement in juvenile Nile tilapia. Each of six purified diets with Se-methionine levels at 0.05, 0.21, 0.41, 0.57, 0.79 and 1.00 mg/kg was assayed in triplicate with initial body weight of 3.00 ± 0.01 g for 8 weeks. The growth of fish was obviously increased when the dietary Se was less than 0.57 mg/kg diet and reached a plateau when the dietary Se was ≥0.57 mg/kg. Serum and hepatopancreatic glutathione peroxidase (GPx) activity increased markedly when the dietary Se was less than 0.57 mg/kg, but then decreased when the dietary Se was higher than 0.57 mg/kg. The malondialdehyde contents in hepatopancreas were significantly decreased when the dietary Se was higher than 0.79 mg/kg. No significant differences were observed in hepatopancreatic total antioxidant capability (T-AOC) among the groups (p >.05). The results of this study indicated that Se addition as Se-methionine was essential, while both the deficiency and excess levels of dietary Se would cause negative effects on growth or antioxidant capability in juvenile Nile tilapia. Based on broken-line regression of WG and piecewise regression of liver GPx, the optimum requirement of Se for juvenile Nile tilapia is 0.57 mg/kg diet.

Research Area(s)

  • antioxidant capacity, GPx, growth, Nile tilapia, requirement, Se-methionine

Citation Format(s)

Optimum selenium requirement of juvenile Nile tilapia, Oreochromis niloticus. / Ning, Lijun; Tan, Yuwen; Wang, WenXiong; Wu, Shuanglong; Chen, Feng; Zhang, Hao; Pan, Qing.

In: Aquaculture Nutrition, Vol. 26, No. 2, 04.2020, p. 528-535.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review