Influence of Dietary Phosphorus on the Growth, Feed Utilization, Proximate Composition, Intestinal Enzymes, and Oxidation Resistance of Sea Cucumber Apostichopus japonicus

Table 6

The intestinal oxidation resistance of sea cucumber fed diets with different phosphorus levels.

	Dietary phosphorus level (%)						Pooled SE
	0.24	0.37	0.51	0.62	0.77	0.89
SOD^1 (U/mg prot)	^a	^bc	^c	^c	^bc	^ab	0.085
CAT^2 (U/mg prot)							0.108
GSH-Px^3 (U/mg prot)	^a	^bc	^d	^cd	^bc	^ab	0.863
GSH^4 (μmol/g prot)	^a	^b	^bc	^c	^bc	^bc	0.691
GSSG^5 (μmol/g prot)	^a	^b	^c	^bc	^ab	^bc	4.232
GSH/GSSG	^a	^a	^a	^a	^b	^b	0.013
MDA^6 (nmol/mg prot)							0.024

Notes: values in the same row with different superscript letters show significant difference (). ¹Superoxide dismutase (SOD, U/mg prot); ²catalase (CAT, U/mg prot); ³glutathione peroxidase (GSH-Px, U/mg prot); ⁴glutathione (GSH, μmol/g prot); ⁵glutathione oxidized (GSSG, μmol/g prot); ⁶malondialdehyde (MDA, nmol/mg prot).