Vol. 14, No. 1, 2021

Inland Water Biology

Biology, Morphology, and Taxonomy of Aquatic Organisms

Two New Species of Free-Living Nematodes (Nematodes, Monhysterida) from the Mouth of the Cấm River, Vietnam

V. G. Gagarin p. 1 abstract

Features of Behavioral Responses of the Mediterranean Mussel in Its Natural Habitat of the Black Sea

V. V. Trusevich, K. A. Kuz’min, V. Zh. Mishurov, V. Yu. Zhuravsky and E. V. Vyshkvarkova p. 10 abstract

Aquatic Flora and Fauna

Flora of Small Reservoirs of Northeastern European Russia

B. Yu. Teteryuk, E. V. Knyazeva, L. V. Teteryuk and A. A. Panyukov p. 20 abstract

Phytoplankton, Phytobenthos, Phytoperyphyton

Biogenic Elements and Their Significance in the Development of Phytoplankton in Reservoirs of the Upper Volga

N. M. Mineeva, I. E. Stepanova and I. V. Semadeni p. 32 abstract

Zooplankton, Zoobenthos, Zooperiphyton

Changes in the Taxonomic Structure of the Turbellarian Community (Platyhelminthes, Turbellaria) due to the Transformation of Environmental Conditions

Ye. M. Korgina p. 43 abstract

Efficiency of Transfer of Essential Substances from Phytoplankton to Planktonic Crustaceans in Mesotrophic Conditions

I. Yu. Feniova, E. G. Sakharova, Zh. F. Buseva, M. I. Gladyshev, N. N. Sushchik, Z. I. Gorelysheva, M. Karpowicz and V. P. Semenchenko p. 49 abstract

Ichthyology

Structural Features of Scales of Baikal Grayling Thymallus baicalensis under Conditions of an Altered Hydrological Regime

I. V. Zuev, P. Yu. Andrushchenko, S. M. Chuprov and T. A. Zotina p. 60 abstract

Ecological Physiology and Biochemistry of Hydrobionts

Functional Effects of the Use of Anesthetics on Teleostean Fishes (Review)

A. A. Soldatov p. 67 abstract

Ependymins: New Data on Participation in the Regulation of Physiological and Behavioral Responses in Teleosts (Review)

D. V. Garina p. 78 abstract

Features of Changes in the Functional State of Sturgeon during Maturation in Closed Water-Supply Installations

E. N. Ponomareva, P. P. Geraskin, G. F. Metallov, A. N. Nevalennyi, V. A. Grigoryev, M. N. Sorokina and Yu. V. Fedorovykh p. 87 abstract

Aquatic Toxicology

Specific Features of Technogenic Pollutants Impact on Photosynthetic Activity of Unicellular Cyanobacteria

N. Yu. Grigoryeva and T. B. Zaytseva p. 94 abstract

Short Communications

Growth Conditions of Water Caltrop Trapa natans on the Northern Border of its Habitat

E. V. Mikhaylova, A. Ye. Artyukhin, M. A. Panfilova and B. R. Kuluev p. 104 abstract

First Record of Thermocyclops taihokuensis (Crustacea, Copepoda) in the Oka River Basin

V. I. Lazareva p. 109 abstract

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

A. V. Krylov, A. O. Hayrapetyan, A. A. Ovsepyan, R. Z. Sabitova and B. K. Gabrielyan p. 113 abstract

Climbing Perch Anabas testudineus Feeding in the Darkness: Observation in Infrared Light

E. D. Pavlov, E. V. Ganzha and D. S. Pavlov p. 117 abstract

High Rate of Endoparasites (Helminth) Infection of Toad (Anurans) in the Dir Lower, Khyber Pakhtunkhwa, Pakistan

A. U. Khan, M. Attaullah, W. Khan, A. Waris, Sh. Khalid and A. Baset p. 121 abstract

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