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

Figure 2

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 P. pelagicus during metamorphosis, at different larval stages (zoea, Z1–Z4; megalopa, Mp; first crab, C) and different adult stages (1M–4M). Vertical bars indicate ± SEM (). The bars with different superscripts are significantly different ().