Changes in proximate composition and lipid quality of َtherina ضtherina sp. during sun drying processing were investigated
Keywords:
Dried products, Processing fishery products, Biochemical composition, Quality assurance, Oxidation, Drying, Hydrolysis, Methodology, Atherina, MED, Tunisia, Kerknnah IsAbstract
The peroxide value PV, thiobarbituric acid reactive substances TBARS and free fatty acids FFA were determined to monitor the progressive oxidative lipid changes during processing. According to Duncan's test, significant differences (p < 0.05) were found in the proximate composition during the drying process. Lipid, protein and ash contents increased significantly after processing. Thus, a high decrease in moisture content was recorded in the final product to reach 22.37%. Fresh atherina oil shows an excellent quality with a low PV (0.97 meq active O2/kg oil), FFA (1.82%) and TBARS (0.32 mg MA/kg oil) levels. After sun drying treatment, PV and FFA increased significantly (p < 0.05) to reach 2.02 meq active O2/kg oil and 3.67% respectively. The primary oxidation products (lipid hydroperoxides) are produced in our processing; however, they haven't generally a flavour impact on the final dried product.
