Nofima reports

Rapport/Report 41/2013, English Summary

Roth, Bjørn; Heia, Karsten; Skåra, Torstein; Sone, Izumi; Birkeland, Sveinung; Jakobsen, Ronny Andre; Evensen, Tor Hatten; Akse, Leif

Publication details

Publisher: Nofima

Issue: 41/2013

Number of pages: 35

International Standard Numbers:
Printed: 978-82-8296-127-1

Open Access: green

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The influence of stress, pumping and storage temperature on the quality of Atlantic herring (Clupea harengus) was investigated. Results show that herring as a pelagic specie were able to maintain an aerobic metabolism during crowding and pumping, but became exhausted after 30 min. This had minor effect on quality measured by colour, gaping and texture softness. The pump pressure was however important, where the proportion of injured fish correlated with the pressure. Softness and gaping increased with storage temperature. Soft texture and gaping in the tail region was a result of breakdown of muscle proteins and connective tissue, related to seasonal effects. In periods with soft texture the time between harvest and processing is vital.