Digestive Enzymes in the Crayfish Cherax albidus: Polymorphism and Partial Characterization

Table 2

Specific activities of amylase, pectinase, alginase, lipase, alkaline protease, and acid protease (U mg⁻¹) in the gastric juice (GJ), hepatopancreas (H), and intestine (I) of juvenile Cherax albidus. Data are reported as means ± SEM. For each enzyme, 𝑛=5. Asterisks represent statistically significant values (𝑃<.05) along the digestive tract within each enzyme.

Specific activity (U mg^−1)	GJ	H	I
Amylase	3.69±1.04	5.50±1.04	10.04±0.75^∗
Pectinase	0.21±0.02	0.90±0.27	1.50±0.49
Alginase	0.02±0.00	0.08±0.02	0.30±0.09
Lipase	0.09±0.03	0.48±0.09^∗	0.39±0.07^∗
Alkaline protease	0.06±0.02	0.11±0.02	0.12±0.00
Acid protease	0.10±0.02	0.27±0.05	0.20±0.01