Efeito da utilização de gelo ozonizado na qualidade do tambaqui resfriado durante armazenamento

Abstract

The tambaqui (Colossoma macropomum) is the native species most produced in Brazilian territory. In the state of Amazonas, it stands out for the preference of the consumers and for its role in the region’s economy. However, marketsellers, supermarkets, retailers and producers find it difficulties on maintain the quality of this fish when stored on ice for a reasonable time. The objective of this research was to evaluate the influence of ozonated ice on the shelf life of the cooled whole tambaqui stored for 35 days by physicochemical, microbiological and sensorial analysis. The physicochemical analysis established the Total Volatile Bases (TVB-N), determination of pH, Thiobarbituric Acid Reactive Substances (TBARS); in the microbiological analysis were researched AerobicHeterotrophic Mesophyll Bacteria (AHMB), AerobicHeterotrophicPsychotropicBacteria (AHPB), Totaland ThermotolerantColiforms, coagulase-positive Staphylococcus and Salmonella spp., besides the sensory analyses (QIM). Based on the results, the shelf life of up to 28 days for the whole tambaqui stored on ice was determined. All the analysis presented significant difference (p<0.05) in relation to the storage time, but the TVB-N was the only indicator that presented significant differences of the control treatment. Further researches are suggested with the use of ozone and the quality of the ice used for fish storage, which may become a potential source of contamination.