Table 4. Non-specific immune parameters of olive flounder (Paralichthys olivaceus) fed the six experimental diets for 12 weeks

	Lysozyme¹⁾	MPO²⁾	Antiprotease³⁾	Immunoglobulin⁴⁾
Thr0.4	8.83 ± 0.10^b	0.87 ± 0.06^b	19.4 ± 1.4^b	10.9 ± 0.5^b
Thr0.8	9.24 ± 0.09^a	0.94 ± 0.07^a	25.7 ± 1.4^a	16.2 ± 0.9^a
Thr1.2	9.27 ± 0.06^a	0.93 ± 0.04^a	25.1 ± 0.6^a	16.4 ± 2.8^a
Thr1.8	9.27 ± 0.14^a	0.97 ± 0.01^a	26.0 ± 0.5^a	16.9 ± 1.6^a
Thr2.0	9.30 ± 0.21^a	0.98 ± 0.06^a	25.5 ± 1.2^a	16.9 ± 0.2^a
Thr2.3	9.28 ± 0.08^a	0.96 ± 0.02^a	25.4 ± 1.5^a	16.9 ± 0.6^a
Pr > F*
ANOVA	0.005	0.001	0.000	0.001
Linear	0.002	0.000	0.000	0.000
Quadratic	0.008	0.004	0.000	0.003

Values are mean of triplicate groups and presented as mean ± SD.
Values with different superscripts in the same column are significantly different (p < 0.05).
Lysozyme (μg/mL).
MPO activity (absorbance at 450 nm).
Antiprotease activity (% inhibition).
Total immunoglobulin (mg/mL).
Significance probability associate with the F-statistic.
MPO, myeloperoxidase; Thr, threonine; AVOVA, analysis of variance.