Effects of Organic Selenium on Growth, Muscle Composition, and Antioxidant System in Rainbow Trout


Hunt A. O. , Berkoz M., Ozkan F., Yalin S., ERÇEN Z., ERDOĞAN E., ...More

ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH, vol.63, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 63
  • Publication Date: 2011
  • Journal Name: ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Oncorhynchus mykiss, organic selenium, growth, antioxidant enzyme, CARASSIUS-AURATUS-GIBELIO, HYBRID STRIPED BASS, SALMON SALMO-SALAR, ONCORHYNCHUS-MYKISS, INORGANIC SELENIUM, DIETARY SELENIUM, FISH-MEAL, SELENOMETHIONINE, BIOAVAILABILITY, GLUTATHIONE
  • Van Yüzüncü Yıl University Affiliated: No

Abstract

This experiment was conducted to understand the effects of organic selenium on rainbow trout, Oncorhynchus mykiss. Fish (33.47 +/- 0.15 g; n = 216) were randomly assigned to four treatment groups consisting of three replicates of 18 fish each in 100 x 100 x 125 cm cages. The fish were fed a basal diet supplemented with 2, 3, or 4 mg/kg organic Se (Sel-Plex (R)) supplementation for 8 weeks. Muscle of fish fed the unsupplemented control diet had a lower (p< 0.05) selenium content (4.78 +/- 0.12 mu g/g) than muscle of fish fed the supplemented feeds (6.45 +/- 0.18, 7.51 +/- 0.17, and 8.23 +/- 0.11 mu g/g for the 2, 3 and 4 mg/kg diets, respectively). The highest (p< 0.05) weight gain and specific growth rate were obtained in fish fed the 3 mg/kg diet. There were no significant differences (p> 0.05) in proximate composition except for protein content in fish fed the 3 mg/kg diet. Glutathione peroxidase (GSH-Px), catalase (CAT), and superoxide dismutase (SOD) activity was significantly higher (p< 0.05) and liver malondialdehyde (MDA) concentration significantly lower in fish fed the supplemented diets than in the control. Results show that 3 mg/kg Se supplementation is most effective for growth and hepatic antioxidant enzyme activity in rainbow trout.