Postmortem autolytic changes of iced stored banded snakehead (Channa striata) (Bloch, 1793)

Abstract

The autolytic changes of iced stored banded snakehead (Channa striata) (Bloch, 1793) was assessed through evaluation of the changes in protein solubility, textural attributes and proteolytic enzyme over 18 days storage period. Study revealed that myofibrillar protein decreased in a significant manner while amount of denatured protein increased throughout the entire study. Total collagen content muscle was stable up to 7th day of incubation and a decrease in this variable was observed. A decrease in acid soluble and insoluble collagen fractions were observed throughout the study, while a small increase in the pepsin soluble collagen till 7th day of incubation was decreased thereafter. Collagenolytic and enzymes activity reaches the maximum level within 3rd day of incubation and are directly involved in the postmortem collagen degradation. An increase in free and decrease in bound lysosomal enzyme activity indicated the instability of lysosomal membrane.