Effect of squid pen chitooligosaccharide in conjugation with different modified atmospheric packaging conditions on color and storage stability of tuna slices

Abstract Effect of squid pen chitooligosaccharide (COS) at different concentrations (0, 400, and 800 ppm) on the discoloration and quality changes in yellowfin tuna (Thunnus albacares) slices packed under modified atmospheric packaging (MAP) using oxygen, argon or their mixture at 4 °C up to 9 days was investigated. Tuna slices packed with oxygen-based MAP in the presence of 400 ppm COS (C4-OXY) showed the lowest reduction in oxymyoglobin (oxyMb) and a* value (redness). This coincided with the lowest formation of metmyoglobin (metMb) than other samples (p