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Interannual Changes in the Spring Zooplankton of the Pelagic Zone of Lake Sevan (Armenia) in the Course of Increasing Fish Biomass

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Abstract

It is shown that increasing fish biomass due to planktivorous whitefish Coregonus lavaretus L. in Lake Sevan leads to a reduction in the number of species, abundance, and biomass of spring ZP. In addition, quantitative characteristics of large species of Cladocera, Daphnia (Ctenodaphnia) magna Straus, and a decrease in the Shannon index value are changing as well. A decrease in the number of filter-feeding cladocerans contributes to a decrease in water transparency and an increase in the proportion of Rotifera in the total abundance and biomass of the community.

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Funding

This study was performed as part of State Task no. АААА-А18-118012690106-7.

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Authors and Affiliations

  1. Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Nekouzskii raion, Yaroslavl oblast, Borok, Russia

    A. V. Krylov & R. Z. Sabitova

  2. Institute of Hydroecology and Ichthyology, National Academy of Sciences of Armenia, Yerevan, Armenia

    A. O. Hayrapetyan, A. A. Ovsepyan & B. K. Gabrielyan

Authors
  1. A. V. Krylov
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  2. A. O. Hayrapetyan
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  3. A. A. Ovsepyan
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  4. R. Z. Sabitova
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  5. B. K. Gabrielyan
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Corresponding author

Correspondence to A. V. Krylov.

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Conflict of interests. The authors declare that they have no conflicts of interest.

Statement on the welfare of animals. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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Translated by D. Pavlov

Abbreviations: ZP—zooplankton; PhP—phytoplankton.

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Krylov, A.V., Hayrapetyan, A.O., Ovsepyan, A.A. et al. Interannual Changes in the Spring Zooplankton of the Pelagic Zone of Lake Sevan (Armenia) in the Course of Increasing Fish Biomass. Inland Water Biol 14, 113–116 (2021). https://doi.org/10.1134/S1995082921010053

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  • DOI: https://doi.org/10.1134/S1995082921010053

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