Incubation Temperature Effect on Qualitative and Quantitative Composition of Abnormalities and Mortality Rate in Embryogenesis of the Barents Sea Capelin Mallotus villosus (Osmeridae)статья
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Дата последнего поиска статьи во внешних источниках: 8 сентября 2020 г.
Аннотация:The development of capelin Mallotus villosus from insemination to total resorption of the yolk isinvestigated at 5 and 8°C by the assessment of development of each individual (3850 eggs obtained from77 spawning pairs). In total, ten malformation types are defined in early development. The frequency of theiroccurrence and embryonic mortality rate during incubation is described. The total malformation number andmortality rate are significantly higher at 8°С than at 5°С. A distinct relationship between early developmentquality and age or body size of the females is not revealed. In the majority of trials, the progenies of largefemales are characterized by better quality, but these data are not always significant. The qualitative compositionand malformation rate of capelin differ from those observed in Atlantic cod Gadus morhua using thesame methods of investigation. In addition, the malformation and mortality rates during early developmentare substantially lower in capelin than in Atlantic cod.