Abstract: The change of TVB-N in fresh grass carp packaged with packaging materials with different O2 permeability under vacuum package or air package was investigated during storage different temperatures: 8 ℃ and 20 ℃. The results show that TVB-N increment (Y) and storage time (t) followed the equation: Y=AtB. In this equation, A was affected by package mode and storage temperature rather than O2 permeability, but B was affected by all the three conditions and expressed as a function of O2 permeability (Q) using the equation: , where a and b were dependent on package mode and storage temperature, d was dependent on storage temperature and O2 permeability rather than package mode.

Key words: fresh fish, packaging material, TVB-N, O2 permeability