Abstract
This study focused on the quality, chemical composition, microbiological population, and sensory assessments of stored mackerel fish products such as bouillon and sauce during the cold storage (4 °C) condition throughout the 12 month of storage period. The fish contains appreciable
amounts of moisture content (71.33 g/100 g), protein content (22.55 g/100 g) and fat content (4.60 g/100 g), whereas the ash content and carbohydrate was recorded 1.23 g/100 g, and 0.29 g/100 g respectively. The results of the present study showed that the proximate chemical compositions of
storage of both products generally increased at the end of the storage period to reach 10.05 g/100 g for protein content, 61.29 g/100 g for carbohydrate, and 17.01 g/100 g for ash content in stock powder. Besides, the sauce has detected an increase in protein content (4.05 g/100 g), fat content
(21.12 g/100 g), ash content (3.41 g/100 g) and carbohydrate (15.09 g/100 g) respectively. The counts of Fecal coliform bacteria and Staphylococcus aureus were less than 10 indicating the good hygienic quality of the developed products. The total aerobic plate counts were significantly
(p < 0005) higher in mackerel fish sauce (3.0×102 CFU/g) compared to stock powder (1.5×102 CFU/g). Yeast counts were found higher in mackerel sauce (1.9×102 CFU/g) compared to mackerel stock powder (1.2×102 CFU/g) at the end of storage period. The sensory
score was slightly reduced after the storage period. In mackerel fish sauce, the long storage period had adversely affected the appearance (8.25), color (8.75) and odor (8.45) of the product, whereas, it enhanced the taste 9.00, and did not affect the texture (8.75) and overall acceptability
(8.70). Overall, scores of all sensory attributes of both products were high indicating the acceptability of these products by panellists. The date showed the benefits mackerel fish products and their availability after storage for 12 months.