1. Food Chemistry Unit, IRTA-Monells, Finca Camps i Armet s/n, Monells, Girona, Spain, Department of Food Science, Meat Science, University of Copenhagen, Rolighedsvej 30 DK-1958 Frederiksberg C, Denmark, and DTU Aqua, National Institute of Aquatic Resources, DTU Building 221, Søltofts Plads, DK-2800 Kgs. Lyngby, Denmark