RELATION OF BIOGENIC AMINES AND BACTERIAL CHANGES IN ICE-STORED SOUTHERN CASPIAN KUTUM (RUTILUS FRISII KUTUM)

Abstract

The biogenic amine (putrescine, cadaverine, histamine and tyramine) content of whole Southern Caspian Kutum (Rutilus frisii kutum) and related bacterial changes (Pseudomonas spp., psychrotrophic and mesophilic counts) were monitored during ice storage for a period of 18 days (0, 3, 6, 9, 12, 15 and 18). Levels of putrescine, cadaverine and bacterial loads increased (P < 0.05) during storage, but histamine and tyramine were not detected in any of the tested samples. Initial concentrations of putrescine and cadaverine were 0.24 and 0.07 mm/kg, and finally reached 5.27 and 4.21 mg/kg, respectively. Correlations were found between putrescine and psychrotrophs, and between cadaverine and pseudomonads. The putrescine and cadaverine content ofwhole Southern Caspian Kutum seemed to be good quality markers and freshness indicators. PRACTICAL APPLICATIONS In our previous study, the presence of contents of biogenic amines in rainbow trout was demonstrated. However, this research was undertaken by testing Caspian Kutum, which was sold in the fish markets in Iran so that a better understanding of the safety quality of the products can be accomplished to better protect the health of the consumers. According to this research, levels of putrescine, cadaverine and bacterial loads increased during iced storage as both biogenic amines cadaverine and putrescine are good quality markers for the Caspian Kutum.