Dietary composition and species on the digestive proteases

		Diet				Significance
Protease	Species	L-CH	L	P	rsm	Diet	Species	Diet * Species
pH 1.5	Sturgeon	4.90^a	3.77^b	2.18^c	1.15	0.000	0.000	0.001
	Trout	19.99^a*	11.94^a*	14.61^b*
pH 3.0	Sturgeon	6.47^a	4.67^b	2.64^c	1.15	0.021	0.000	0.316
	Trout	18.77*	14.04*	15.84*
pH 4.0	Sturgeon	0.00	0.49	0.35	0.19	0.235	0.000	0.007
	Trout	2.49*	1.20*	2.13*
pH 7.0	Sturgeon	6.13^a	4.35^b	2.89^c	1.07	0.002	0.000	0.111
	Trout	18.47^ab*	12.84^c*	15.17^bc*
pH 8.5	Sturgeon	6.98^a	5.02^b	3.67^b	1.01	0.005	0.000	0.588
	Trout	18.15*	13.81*	13.77*
pH 9.0	Sturgeon	7.33^a	5.01^b	3.79^b	0.93	0.005	0.000	0.934
	Trout	16.70*	13.86*	12.34*
pH 10.0	Sturgeon	7.14^a	4.79^b	3.67^b	0.85	0.001	0.000	0.780
	Trout	16.01*	12.71*	11.16*
ApH¹	Sturgeon	11.37^a	8.93^b	5.17^c	2.42	0.000	0.000	0.058
	Trout	41.25^a*	27.18^b*	32.58^ab*
NBpH¹	Sturgeon	27.58^a	19.17^b	14.01^b	3.80	0.001	0.000	0.615
	Trout	69.33*	53.23*	52.44*
ApH/NBpH¹	Sturgeon	0.41^ab	0.47^a	0.37^b	0.02	0.755	0.000	0.003
	Trout	0.61*	0.51	0.62*

1 ApH: total acid protease activity (pH 1.3-4.0); NBpH: total neutral/basic protease activity (pH 7.0-10.0); ApH/NBpH: ApH/NBpH ratio
a, b, c Values within each row with different superscripts are significantly different (p<0.05)
* These values are significantly different from the corresponding to the other species (p<0.05)

Table 4: Effects of dietary composition and species on the digestive protease activity at different pHs (U/mg protein) (n = 12, 4/each replicate)

Goto home»