Influence of quality change of antarctic krill on protease activity and soluble protein

The relationship among protease activity, soluble protein content and quality in antarctic krill (euphausia superba) was discussed under different storage temperature and storage life. TVB-N and total plate count went beyond the limits of spoilage after antarctic krill was stored under 10℃ for 15h, or stored under 4℃ for 36h. Even if the antarctic krill was stored under-20℃, it would also went spoilage with a rapid rate.-80℃ was the perfect storage temperature of the antarctic krill, which could keep its quality and activity under ultralow temperature. As the quality of antarctic krill declined, the TVB-N and total plate count went up logarithmically, the protease activity and soluble protein content decreased, moreover, they existed significant association during storage process under 10℃, 4℃ and-20℃. Protease activity, TVB-N and total plate count were not significantly correlated. Soluble protein, TVB-N and total plate count on the LOD scores existed significant correlation.