Dietary Clostridium butyricum Improves Growth Performance and Resistance to Ammonia Stress in Yellow Catfish (Pelteobagrus fulvidraco)

Table 5

Intestinal enzyme activities (U/mgprot) of juvenile yellow catfish fed diets containing different levels of CB for 56 days (, ).

	Dietary CB concentrations (mg/kg)
Items	CB0	CB1	CB2	CB3	CB4
Trypsin	^a	^ab	^b	^b	^ab
Lipase
Amylase
ALP	^a	^b	^b	^b	^a
CK	^a	^ab	^b	^ab	^a
Na^+/K^+-ATPase	^a	^ab	^ab	^b	^ab

Different superscript letters within a row indicate significance (). Abbreviation: ALP: alkaline phosphatase; CK: creatine kinase.