Fish performance, fillet characteristics, and health assessment index of rainbow trout (Oncorhynchus mykiss) fed diets containing adequate and high concentrations of lipid and vitamin E

摘要: The recent trend for rainbow trout feeds to be higher than 15% lipid may improve feed conversion ratios (FCRs) and increase the concentration of fish. However, one disadvantage in fish is potential increased rates oxidation, which could affect health contribute off-flavors fillets. objective this experiment was determine effects adequate high concentrations dietary antioxidant vitamin E on performance, health, fillet product quality trout. A 10-week feeding trial conducted with diets containing either 15 or 30 g lipid/100 feed, 300 (e) 1500 (E) mg dl-α-tocopheryl acetate/kg (15e, 15E, 30e, 30E). Fish fed 30% had significantly final body weight, specific growth rate (SGR), protein efficiency ratio (PER) diets. All parameters measured were within normal ranges healthy although several affected by increasing concentration. Lipid (whole body, fillets, viscera) reflected Increasing from 8.4 9.6 fillet. Vitamin fillets ranged 8.3 mg/kg (30e) 49.1 (15E) (P<0.05). malonaldehyde [thiobarbituric acid reactive substances (TBARS)] diets, “E” lower “e” diet. Principal components analysis sensory evaluation results showed that 30e scores other treatments a “fishy” axis, highly correlated overall flavor intensity, fishy, musty, sour, bitter attributes. “Fishy” 30E comparable those 15e These suggested reduce aroma