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Effects of dietary Cr on (A) weight gain (WG) and (B) frequency of formation of micronucleus (MN) in the erythrocytes of striped catfish. The analyzed dietary Cr concentration was log transformed for better visualization. Requirement derived with the polynomial regression method for WG was 2.82. Values with different alphabetical superscripts differ significantly (p < 0.01) among different diets.
