Determination and comparison of texturel characteristics of cuttural changes in myocin heavy chain (MHC) on post-mortem changes in rainbow trout (Oncorhynchus mykiss W., 1972), brook trout (Salmo trutta fario L., 1758) and spring trout (Salvelinus fontinalis)

In this study, post mortem myofibril proteins changes in myocin heavy chain mass using SDS-PAGE and texture specialties such as hardness, adhesiveness, cohesiveness, resilienceness, chewiness, gumminess Fmax, Fmin and Fmax-Fmin, was determined and compared on the days 0., 3., 6. and 9. in three different trout species (Oncorhynchus mykiss, Salmo trutta fario ve Salvelinus fontinalis). Acording to texture specialities, post mortem hardness, cohesiveness, resilienceness, chewiness and gumminess were decreased day by day, and springiness, Fmax, Fmin and Fmax-Fmin were significantly increased (p<0.05). According to SDS-PAGE results, a decreased value on myosin heay chain was determined (p<0.05). Texture specialities and SDS-PAGE result were found different among groups (p<0.05). Correation among hardness, chewiness, gumminess, MHC, between chewiness, gumminess, between Fmax and Fmin, Fmax-Fmin and also Fmin and Famx-Fmin were significant. As a result of the study, it was determined that SDS-PAGE results and texture specialities support each other.