Nofima reports

Rapport/Report 7/2012 English Summary

Heia, Karsten; Sivertsen, Agnar Holten; Wold, Jens Petter; Ottestad, Silje; Böcker, Ulrike; Carlehøg, Mats; Altintzoglou, Themistoklis; Sone, Izumi; Gundersen, Bjørn

Publication details

Publisher: Nofima AS

Issue: 7/2012

Number of pages: 24

International Standard Numbers:
Printed: 978-82-7251-960-4

Open Access: green


In this work it has been shown that color and color stability during storage of salmon fillets depend on the amount and oxidation level of hemeproteins in the muscle. A hyperspectral imaging system has been developed for detecting blood and melanin spots at a conveyor belt speed of 40 cm/second. The results show that melanin spots can be detected with a high degree of accuracy and that blood and melanin spots can be differentiated.
The performance of a commercial pin boning routine has been evaluated in one factory. The results show that the performance is not satisfactory with regard to removing pin bones that bothers the consumers. A consumer test reveals that 90 % of the consumers are sensitive to pin bones thicker than 0.35 mm and longer than 9 mm. In the industrial test 83 % of the remaining pin bones after the manual control were above this threshold.