Journal
RUSSIAN JOURNAL OF DEVELOPMENTAL BIOLOGY
Volume 44, Issue 6, Pages 326-335Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1062360413060076
Keywords
gonads; experiment; fish; eggs; histological analysis
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Funding
- Russian Foundation for Basic Research [11-04-00697]
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Fecundity and mass of egg, 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. Survival of offspring of dwarf females at the early stages of development is lower than of anadromous females. Our results agree completely with the published data. It is suggested that dwarf females are not able to withstand intraspecific and interspecific competition because of low reproductive ability. This explains rarity of natural populations of dwarf (landlocked) forms of Atlantic salmon.
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