Effects of Pecan Nut ( Carya illinoiensis ) and Roselle Flower ( Hibiscus sabdariffa ) as Antioxidant and Antimicrobial Agents for Sardines ( Sardina pilchardus ).

The effects of pecan nut ( Carya illinoinensis ) and roselle flower ( Hibiscus sabdariffa ) as antioxidant and antimicrobial agents on shelf life extension of sardines ( Sardina pilchardus ) were evaluated over a period of 5 days at 7 ± 1 °C. Treatments consisted of the addition of 5% and 10% w / w pecan nut, 5% w / w roselle flower and a combination of 5% of each. Physicochemical (lipid oxidation, fatty acids, hexanal and biogenic amines), sensory and microbiological characteristics of fish samples were periodically analyzed. All treatments effectively improved physicochemical quality parameters, with 10% w / w pecan nut having the highest effectiveness. The presence of roselle flower reduced microbial growth. Our findings suggest that addition of a natural preservative combining pecan nut and roselle flower may extend the shelf life of fresh sardines during chilled storage while maintaining quality indexes.