System- and fish-size-specific reference intervals for plasma analytes in Atlantic salmon (Salmo salar L.) reared in commercial fresh- and saltwater recirculating aquaculture systems: a descriptive study - Amlie, Thomas; Persson, David; Nørstebø, Simen Foyn; Østvik, Asgeir; Stormoen, Marit; Evensen, Øystein (Frontiers in Aquaculture, 2025)