Influence of Stress and Dietary Natural‐Source Vitamin E on Nonspecific Immunocompetence, Tissue Tocopherol Composition, and Postslaughter Fillet Oxidative Stability in Sunshine Bass

We evaluated the effects of stressor exposure and super-requirement levels of RRR-atocopheryl acetate on production performance and nonspecific immunocompetency of juvenile sunshine bass

Jesse T. Trushenski

2007

Scholarcy highlights

  • Abstract.—We evaluated the effects of stressor exposure and super-requirement levels of RRR-atocopheryl acetate on production performance and nonspecific immunocompetency of juvenile sunshine bass
  • Oxidation product concentrations were significantly altered by stressor exposure after shortterm frozen storage; subchronic stress was associated with significantly higher aldehyde and lower peroxide concentrations relative to the control
  • Sunshine bass fillet tocopherol composition tended to reflect dietary Natural-source vitamin E content; significantly increased levels of deposition were associated with the 100X treatment level
  • The increased potency of NSVE is associated with superior binding of RRR-a-tocopherol to hepatic a-tocopherol transport protein and greater retention of RRR-a-tocopherol compared with its racemates or other tocopherol isomers
  • No significant differences in lysozyme activity, macrophage respiratory burst, or bactericidal activity were observed with respect to stressor or dietary treatments, and no significant interactions
  • A-TTP has not been isolated from a teleost model, apparent patterns of discriminatory tocopherol trafficking in sunshine bass and Atlantic salmon Salmo salar are similar to those observed in mammalian models
  • Postslaughter fillet oxidative stability; providing RRR-a-tocopherol as Natural-source vitamin E in excess of the dietary requirement may offer some protection against reductions in shelf life of aquaculture products

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