Control of parr-smolt transformation and seawater tolerance in farmed Atlantic salmon (Salmo salar). Effects of photoperiod, temperature, gradual seawater acclimation, NaCl and betaine in the diet

adaptation agua de mar alimentation des poissons atlantic salmon betaina betaine body measurements chlorure de sodium choix de la date control del crecimiento duration eau de mer estados postlarvales fish culture fish feeding fotoperiodismo growth control jeune animal light regimes mensuration corporelle noruega norway osmoregulation photoperiodicity piscicultura pisciculture postlarval stages regimenes de luz saison salmo salar saumon atlantique sea water seasons sodium chloride supervivencia suplementos supplements survie survival temperatura temperature timing tolerancia a la humedad water tolerance young animals