Nofima reports

Rapport/Report 32/2012

Tobiassen, Torbjørn I; Herland, Hilde; Heide, Morten; Østli, Jens; Sogn-Grundvåg, Geir; Midling, Kjell Øyvind; Erikson, Ulf Gøran; Digre, Hanne

Publication details

Publisher: Nofima AS

Issue: 32/2012

Number of pages: 36

International Standard Numbers:
Printed: 978-82-8296-021-2

Open Access: green


The background for this project is a discussion about whether electrical anesthesia can cause damage to the salmon filet and cause muscle bleeding. In this project, we surveyed the industry's own view of the challenges related to anesthesia and product failures. It was carried out a survey and interviews with several salmon slaughterhouses and smokehouses as well as processing companies. The results of the survey showed that most slaughterhouses do not have big challenges with quality, but some however reported challenges related to quality.
Problems with broken backbones and bloodspots related to electrical stunning are reduced. A survey of which types of anesthesia were used in slaughterhouses and whether the industry was ready for the phasing out of CO2 after 1 July 2012. As of now there are a total of 50 slaughterhouses operating and of these, 39 participated in the survey.
In September 2012 there were only two slaughterhouses that hadn’t phased out CO2.
Technologies to ensure good anesthesia and quality are available, but the industry points out the importance of having a controlled and steady flow of fish through the slaughter line to ensure good quality and welfare.