Quality Index Method scheme for whole fresh carapeba (Eucinostomus gula, Quoy & Gaimard, 1824) stored in ice

Esquema do Método do Índice de Qualidade para carabepa inteira fresca (Eucinostomus gula, Quoy & Gaimard, 1824) armazenada em gelo

Abstract

Considering the importance of sensory schemes for the evaluation of the freshness of different fish species, and the fact that carapeba (Eucinostomus gula) is an important commercial marine fish species in Northeastern Brazil, the objective of this study was to evaluate the freshness and shelf life of this fish during 18 days stored in ice. Changes during storage were observed according to the sensory evaluation (Quality Index Method - QIM), physicochemical analyses (pH, total volatile basic nitrogen - TVB-N, and trimethylamine - TMA-N) and microbiological analyses (total mesophilic and psychrotrophic counts). High correlation was found between the Quality Index (QI) and storage time. The microbiological results showed increases in the mesophilic and psychrotrophic counts as from the 9^th day of storage. The TVB-N and TMA-N both increased during storage and the pH value increased slowly. The results suggested that the fresh carapeba is acceptable for consumption when kept in ice for up to 10 days.

Keywords:
Fish; Freshness; Quality; Sensory evaluation