Refrigerated Storage (2 °C) of Sole (Solea solea) Fillets under CO2-Enriched Atmospheres

Microbial (total viable, Brochothrix thermosphacta, lactobacilli, and Enterobacteriaceae counts), biochemical [pH, total volatile nitrogen, nucleotide breakdown products, d (−) and l (+) lactic acid, and short-chain fatty acids], and sensory attributes (color and odor) of refrigerated (2 °C) sole ( Solea solea ) fillets under CO 2 -enriched [CO 2 /air (20/80) (v/v) and CO 2 /air (40/60) (v/v)] atmospheres were determined. Sensory results showed shelf life extension of 4 and 8 days for 20 and 40% CO 2 -enriched atmospheres, respectively. Microbial and biochemical results revealed that the 40%CO 2 -enriched atmosphere was the most effective package type for refrigerated sole.