Advances in our understanding of the parr–smolt transformation of juvenile salmon: a summary of the 10th International Workshop on Salmon Smoltification

New wine in old bottles: Modification of the Na+/K+‐ATPase enzyme activity assay and its application in salmonid aquaculture

“…As part of optimizing the NKA enzyme activity assay we found increased NKA enzyme activity in gills, intestine and kidneys during PST, consistent with the notion of preparatory change to secure sufficient hypo‐osmoregulatory capacity when entering the marine environment 38,74 . Gills have been extensively studied and are thus the key organ monitored through smolt development in Atlantic salmon 13,32,33,75 . Similarly, intestinal absorption of water and monovalent ions during PST and SW transfer have been linked to increased NKA enzyme activity 35,37,50,76 .…”

“…38,74 Gills have been extensively studied and are thus the key organ monitored through smolt development in Atlantic salmon. 13,32,33,75 Similarly, intestinal absorption of water and monovalent ions during PST and SW transfer have been linked to increased NKA enzyme activity. 35,37,50,76 Despite NKA activity in the kidneys has been studied to some extent in euryhaline species, [77][78][79][80][81] only three studies are available in Atlantic salmon.…”