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.)

Abnormal development of gonads of dwarf females and low survival of their offspring as the cause... 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Developmental Biology Springer Journals

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.)

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/lp/springer_journal/abnormal-development-of-gonads-of-dwarf-females-and-low-survival-of-twARsFSSRR
Publisher
Springer US
Copyright
Copyright © 2013 by Pleiades Publishing, Inc.
Subject
Life Sciences; Developmental Biology; Animal Anatomy / Morphology / Histology
ISSN
1062-3604
eISSN
1608-3326
D.O.I.
10.1134/S1062360413060076
Publisher site
See Article on Publisher Site

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