Abstract
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 9th 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.
Highlights
IntroductionIndex Method (QIM) is currently increasing in the sensory analysis of marine products (MARTINSDÓTTIR et al, 2001; GONÇALVES et al, 2015), and in the future is expected to be the main sensory method for research purposes (by researchers in laboratories), industries (for more precise inspection and clear decisions about fish quality) and possibly in fish auction markets (MARTINSDÓTTIR et al, 2001; SVEINSDÓTTIR et al, 2002)
The use of descriptive analyses like the Quality
The results suggested that the fresh carapeba is acceptable for consumption when kept in ice for up to 10 days
Summary
Index Method (QIM) is currently increasing in the sensory analysis of marine products (MARTINSDÓTTIR et al, 2001; GONÇALVES et al, 2015), and in the future is expected to be the main sensory method for research purposes (by researchers in laboratories), industries (for more precise inspection and clear decisions about fish quality) and possibly in fish auction markets (MARTINSDÓTTIR et al, 2001; SVEINSDÓTTIR et al, 2002). Carapeba or carapicu (Figure 1), Eucinostomus gula (Quoy & Gaimard, 1824) is an important commercial marine fish species in Northeastern Brazil (SOARES, 2010), belonging to the family Gerreidae, being characteristic of tropical and subtropical waters. Considering the commercial importance of carapeba in Brazil, the demands for quality and its high perishability, this study aimed to evaluate the freshness and shelf life of this species when stored on ice for 18 days
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