[Abnormal development of gonads of dwarf females and low survival of their offspring as the cause of rarity of resident populations of Atlantic salmon (Salmo salar L.)].

Fecundity and mass of eggs, as well as survival of offspring, of hatchery-reared small (less than 406 g) females of Atlantic salmon are determined. The absolute fecundity and mass of egg of artificially reared fish are sufficiently less than that of anadromous spawners. Small females are characterized by delayed spawning; histological analysis has demonstrated significant asynchrony in oocyte development of some specimens.