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.)
作者： A. A. Makhrov , M. V. Ponomareva , O. V. Khaimina , V. E. Gilepp , O. V. Efimova
DOI: 10.1134/S1062360413060076
关键词:
摘要: Fecundity and mass of egg, as well survival offspring, hatchery-reared small (less than 406 g) females Atlantic salmon are determined. The absolute fecundity egg artificially reared fish sufficiently less that anadromous spawners. Small characterized by delayed spawning; histological analysis has demonstrated significant asynchrony in oocyte development some specimens. Survival offspring dwarf at the early stages is lower females. Our results agree completely with published data. It suggested not able to withstand intraspecific interspecific competition because low reproductive ability. This explains rarity natural populations (landlocked) forms salmon.
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