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
  • Çukurova University Affiliated: Yes

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.