Journal of Stress Physiology & Biochemistry, Vol. 19, No. 4, 2023, pp. 225-236       ISSN 1997-0838
Original Text Copyright (cc) 2023 by  A.I. Sidorova

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Role of Gmelinoides fasciatus (Crustacea: Amphipoda) in Macrozoobenthos on the Littoral of Lake Onego During the Subglacial Period

A.I. Sidorova

Northern Water Problems Institute of the Karelian Research Centre of the Russian Academy of Sciences, Petrozavodsk, 185030 Russia


Received October 17, 2023

Macrozoobenthos of the littoral of Lake Onego is represented by 22 units of different taxonomic rank. The invasive species Gmelinoides fasciatus (Stebbing 1899) (CRUSTACEA: AMPHIPODA) plays a dominant role by biomass in the littoral macrozoobenthos community during the subglacial period. The peculiarities of the size and sex composition of the G. fasciatus population are studied. It was shown for the first time that in the subglacial period on the littoral of Lake Onego the population of amphipods contains young individuals from 2.1 mm, in contrast to the size composition of this species in Lake Ladoga. Apparently, these are crustaceans that appeared in the summer of the previous year, as we did not discover any breeding females. The sexual structure of the G. fasciatus population in Lake Onego is stable, with the ratio of females to males being 1:1.

Key words:    taxonomic composition, invasive species, size structure, Lake Onego, Gmelinoides fasciatus

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