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. 2011 Jan 13;37(3):657–666. doi: 10.1007/s10695-011-9466-3

Fig. 2.

Fig. 2

Serum AST activity in O. niloticus exposed to toxicants for 4 and 21 days. Data are expressed as mean ± standard error (N = 6). Different letters indicate significant differences among groups at the same time (P < 0.05)