Shelf life of different fish species stored by a passive refrigeration treatment (PRS)

Passive Refrigeration is a system developed for the preservation and transport of perishable products. Passive Refrigeration (PRS) technology is based on thermal accumulation achieved through the freezing of eutectics obtained by circulating cold brine when power is available and/or has a competitive price. The system guarantees perfect preservation through the maintenance of optimal temperature and relative humidity without the use of power during operation. Aim of this work was to evaluate the efficacy of this technology in the storage of different fish products. PRS technology was effective in extending the shelf life of shellfish and cod. Moreover, for shellfish lower mortality was observed. For the cephalopods the PRS proved less effective. In the cod only TVN showed a good correlation with the evolution of sensory parameters. The PRS can be a valuable tool for the storage of fish products, especially immediately aftercapture and during transport.