Development of Enzymes and In Vitro Digestibility during Metamorphosis and Molting of Blue Swimming Crab (Portunus pelagicus)

Figure 3

Total weight and specific activities of digestive enzymes, amylase (μmol maltose min⁻¹ mg protein⁻¹), total protease (U mg protein⁻¹), trypsin and chymotrypsin (μmol p-nitroaniline min⁻¹ mg protein⁻¹), and activity ratio of trypsin to chymotrypsin (T/C ratio) of adult P. pelagicus during a molting period; early postmolt (A), postmolt (B), intermolt (C1), late intermolt (C2), early premolt (D1), mid premolt (D2), late premolt (D3), and very late premolt (D4). Vertical bars indicate ± SEM ( = 3–5). The bars with different superscripts are significantly different ().