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Changes in the structural parameters of the summer zooplankton in the pelagic zone of Lake Sevan (Armenia) during an increase in fish abundance and biomass

  • Zooplankton, Zoobenthos, and Zooperiphyton
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Abstract

Features of the composition and structure of the summer zooplankton in the pelagic zone of Lake Sevan in years that were characterized by different abundances and biomasses of fish are described. It is shown that the species diversity of the community and the specific number of species of zooplankteurs, the quantity of Copepods in the total abundance and biomass of zooplankton, as well as the value of the Shannon index and the trophic coefficient, increased upon an increase in the fish abundance. At the same time, the total biomass of zooplankton and biomass of cladocerans decreased, among which the density and biomass of the larger and more colored Daphnia (Ctenodaphnia) magna Straus decreased, but the density and biomass of D. (Daphnia) hyalina Leydig and Diaphаnosoma brachyurum Lievin increased.

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Authors and Affiliations

  1. Institute for the Biology of Inland Waters, Russian Academy of Sciences, Borok, Nekouzskii raion, Yaroslavl oblast, 152742, Russia

    A. V. Krylov, Yu. V. Gerasimov & M. I. Malin

  2. Institute of Hydroecology and Ichthyology, Scientific Center for Zoology and Hydroecology, National Academy of Sciences of Armenia, ul. Paruira Sevaka 7, 0014, Yerevan, Republic of Armenia

    A. O. Hayrapetyan

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  1. A. V. Krylov
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  2. A. O. Hayrapetyan
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  3. Yu. V. Gerasimov
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  4. M. I. Malin
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Correspondence to A. V. Krylov.

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Original Russian Text © A.V. Krylov, A.O. Hayrapetyan, Yu.V. Gerasimov, M.I. Malin, 2016, published in Biologiya Vnutrennikh Vod, 2016, No. 1, pp. 80–85.

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Krylov, A.V., Hayrapetyan, A.O., Gerasimov, Y.V. et al. Changes in the structural parameters of the summer zooplankton in the pelagic zone of Lake Sevan (Armenia) during an increase in fish abundance and biomass. Inland Water Biol 9, 73–78 (2016). https://doi.org/10.1134/S1995082916010090

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  • DOI: https://doi.org/10.1134/S1995082916010090

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