Comparing of qualitative changes among the carps culturing in a pond, an under controlled place and marine carp during refrigeration

The kind of feeding and feed conditions affect on fish quality. They also affect on proximate composition and fish shelf life. Hence the aim of this study was the evaluation of qualitative changes among the carps culturing in a pond (CCP)¡ an under controlled place (CL) and marine carp (MC) during refrigeration. In order to perform this study¡ the fish was stored at 4◦C for 15 days. During the storage time¡ qualitative changes were evaluated with recording changes in their Total Volatile Bases Nitrogen (TVN)¡ Thiobarbiotic Acid (TBA)¡ Free Fatty Acids (FFA)¡ pH¡ WHC and heme iron. The proximate compositions of fish fillet (moisture¡ protein¡ lipid and ash) were evaluated. The results showed that the highest value of moisture and the lowest value of lipid were observed in CCP. Protein levels among different treatments did not have significant difference. TVN¡ TBA and FFA increased during refrigeration. pH changes didn’t follow an identical pattern in all treatments. The highest level of TBA and FFA and the lowest level of heme iron were observed in CCP. The highest level of WHC was observed in marine carp. The results showed that CCP had more potential to decay.