Comparison of Physicochemical Quality, Macronutrient and Energetic Values of Fresh and Canned Tuna After Storage Different Periods

We evaluated the nutritional value of fresh and canned tuna based on the date of production and expiration and measured the concentration of heavy metals in samples. The twenty cans of tuna and 5 kg of fresh tuna were prepared. After 6, 9 and 11 months storage of canned fish, percentage of proximate, pH and concentration of heavy metals measured. The results showed that the proximate composition of canned samples changed comparing to the fresh samples during different periods. The percentage of fat and protein increased and decreased significantly respectively. The energy values of canned fish decreased over time, but on 11th month storage after production, it was higher than fresh fish. The concentration of heavy metals significantly increased over time, but ​​obtained contents were lower than the limits allowed by international standards which will not pose a problem for human consumption.