Fig. 6

Activities of CAT (a) and SOD (b) and MDA content (c) in serum, activities of CAT (d) and SOD (e) and MDA content (f) in the liver of tilapia fed a commercial diet un-supplemented (control) or supplemented with 1% or 2% Arg. Values are means ± SEM, n = 3 tanks per group. Means without a common letter differ, P < 0.05. CAT, catalase; MDA, malondialdehyde; SOD, superoxide dismutase