title: [Changes in the concentration of sodium in the blood of the Atlantic salmon Salmo salar during ontogeny].
abstract: Studies have been made on sodium concentration in the blood serum of 3 races of the Atlantic salmon--White Sea, Baltic Sea and landlocked. In non-migrating parr from 10 reservoirs sodium level in the blood was not related to the fish race, age of fish or external concentration of sodium. In river smolt, insignificant variation of the mean sodium concentration in the blood were found together with a marked increase in variability of this index. In marine smolt, sodium level was found to be higher, whereas its variability is lower as compared to those in non-migrating parr. The increase in variability of sodium level during smoltification is presumably associated with transition of the chloride cells into excretory state already in fresh water.
mesh_terms: D000367:Age Factors; D000818:Animals; D012474:Salmon / Q000097:blood*; D012964:Sodium / Q000097:blood*; D013045:Species Specificity
chemical_list: D012964:Sodium
vernacular_title: Izmeneniia kontsentratsii natriia v krovi v ontogeneze atlanticheskogo lososia Salmo salar.