Abstract

Abstract Pond-raised fingerling and adult channel catfish (Ictalurus punctatus) fed commercial production feeds (which contained an estimated 13 and 25 mg/kg endogenous vitamin E in summer and winter feeds, respectively) supplemented with 72 and 144 mg vitamin E (as dl-∝-tocopherol acetate) per kilogram feed showed no significant differences (P > 0.05) in mean survival, feed conversion, weight gain, hematocrit, or erythrocyte fragility compared with channel catfish fed the same production feed supplemented with 36 or 66 mg/kg vitamin E.

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