Table 3.

The PO and SOD activity of P. vannamei measured spectrophotometrically after 6 weeks of the experiment.

Group	PO	SOD
0.00 %	0.122 ± 0.01	80.7 ± 8.08b
0.05 %	0.134 ± 0.01	92.6 ± 4.71a
0.10 %	0.130 ± 0.01	87.5 ± 3.21ab
0.50 %	0.131 ± 0.00	92.4 ± 3.16a
1.00 %	0.124 ± 0.01	87.0 ± 5.98ab

1) Values are the mean of triplicates and are presented as mean ± SD.

2) Values with different superscripts in the same column are significantly different (P < 0.05).

3) The lack of superscript letters indicates no significant differences among treatments.