2.material and methods
2.1 General
In November 2006 at the North west coast of Norway, at the commercial slaughtering facilities at Ulvan, Marine Harvest Norway, atotal of 181 market sized Atlantic salmon (salmo salar) equal of 4.9+-0'96 kg (SD) were slaughtered in various ways combining stunning methods (percussive and electrical) and pre slaughtering conditions (at the cage, after pumping and after pumping and live chikking).