Vol. 19, No. 1, 2026

Inland Water Biology

STRUCTURE AND FUNCTIONING OF AQUATIC ECOSYSTEMS

Carbonate System and Carbon Dioxide Flux Through the Surface of Naroch Lakes (Belarus)

Y. K. Veras, T. V. Zhukova, and B. V. Adamovich p. 1 abstract

AQUATIC FLORA AND FAUNA

New Data on the Cyclopoida (Copepoda) Fauna of Water Bodies and Watercourses of Sakhalin

O. A. Chaban, D. S. Zavarzin, N. M. Sukhikh, and V. R. Alekseev p. 11 abstract

BIOLOGY, MORPHOLOGY, AND SYSTEMATICS OF HYDROBIONTS

Comparative Analysis of Contradictions between Phenotypic and Genetic Transformations in Marine and Freshwater Forms of Triglopsis quadricornis (Pisces: Cottoidei)

V. G. Sideleva, Z. V. Zhidkov, A. A. Sevruk, E. A. Melnikova, and V. N. Glinsky p. 34 abstract

WATER MICROBIOLOGY

Taxonomic Diversity of Freshwater Prokaryotes in Two Meromictic Lakes of Different Types in Northwestern Russia (Arkhangelsk Oblast)

T. I. Lovdina, T. Ya. Vorobyeva, S. D. Prasolov, A. V. Chupakov, S. A. Zabelina, O. Yu. Moreva, and A. S. Aksenov p. 44 abstract

PHYTOPLANKTON, PHYTOBENTHOS, PHYTOPERIPHYTON

Dynamics of Phytoplankton Development in Different Types of Waters of the Floodplain–River System of a Large Plain River

A. V. Kotovshchikov, M. K. Shirinina, V. L. Paradosskij, M. A. Safonova, and A. V. Dyachenko p. 60 abstract

Influence of Climate Change on the Structure of Biomass of Summer Phytoplankton in Lakes of the Volga-Kama Reserve, According to the Results of Long-Term Observations

O. V. Palagushkina, E. N. Unkovskaya, and L. B. Nazarova p. 74 abstract

HIGHER AQUATIC VEGETATION

Estimation of the Specific Surface Area of Submersed Macrophytes in Lake Naroch (Belarus)

T. A. Makarevich p. 89 abstract

ZOOPLANKTON, ZOOBENTHOS, ZOOPERIPHYTON

Vertical Structure of Zooplankton in Stratified Lowland and Mountain Lakes

V. V. Vezhnavets and M. D. Zhurauliou p. 96 abstract

Longitudinal Distribution of Zooplankton in the Middle Ob in Relation to Environmental Factors

G. V. Fetter, N. I. Yermolaeva, V. K. Popkov, I. V. Tokareva, and L. G. Kolesnichenko p. 108 abstract

Macroinvertebrate Communities of Small Subarctic Water Bodies

O. A. Loskutova, M. A. Baturina, A. B. Novakovsky, and T. A. Kondratjeva p. 123 abstract

Macrozoobenthos of the Luga Bay (the Gulf of Finland of the Baltic Sea) in the Impact Zone of Commercial Seaport Ust-Luga in 2016–2023

A. A. Filippov, V. A. Zhigul’skii, T. S. Bylina, M. A. Timofeeva, and E. A. Movchan p. 138 abstract

Reproductive Characteristics of Amphipods in Water Bodies of Northwest Russia: Influence of Natural and Anthropogenic Factors

N. A. Berezina p. 146 abstract

Fecundity of Alien Species of Amphipods (Crustacea, Amphipoda) in Watercourses of Belarus

A. I. Makarenko, V. V. Vezhnavets, and T. V. Makarenko p. 164 abstract

The Distribution of Bloodworm Stock (Chironomus: Diptera) in Waterbodies of the Leningrad Region

Y. A. Zuyev, A. Yu. Tamulyonis, V. A. Golotin, E. A. Stratanenko, and A. V. Shatsky p. 174 abstract

ICHTHYOLOGY

Evolutionary Origins and Prospects for Interaction between Invasive Pink Salmon and Natural Populations of Atlantic Salmon in the White Sea–Barents Sea Basin (Review)

A. N. Stroganov, A. P. Novoselov, E. V. Ponomareva, V. A. Belyaev, and P. K. Afanasiev p. 184 abstract

Fish Fauna of Small Water Bodies as an Indicator of Floodplain Inundation

V. V. Osipov and I. W. Bashinskiy p. 196 abstract

Nutrition and Trophic Interactions of Fish of the Kholmovskoye and Lakhta Lake System

V. A. Lukina and N. Yu. Matveev p. 205 abstract

Spawning Behavior of Stenodus leucichthys nelma (Coregonidae)

S. M. Semenchenko and N. V. Smeshlivaya p. 213 abstract

Status and Ways of Managing Fish Resources in the Context of Climate Change and Anthropogenic Impact in Water Bodies of the European North of Russia

A. P. Novoselov p. 220 abstract

ECOLOGICAL PHYSIOLOGY AND BIOCHEMISTRY OF AQUATIC ORGANISMS

Effect of Cold Shock Exposure on the Morphology and Antioxidant Status of Circular Red Blood Cells in the Blackscorpion Fish Scorpaena porcus

N. E. Shalagina, A. A. Soldatov, O. L. Gostyukhina, and V. N. Rychkova p. 237 abstract

SHORT COMMUNICATIONS

Assessment of the Current Trophic Status of Small Lakes in Northern Karelia

A. N. Sharov p. 249 abstract

Survival of Different Color Morphs of Baikal Amphipod Eulimnogammarus vittatus (Crustacea: Amphipoda) under Ultraviolet Irradiation

E. S. Kondrateva, A. N. Gurkov, Y. A. Rzhechitskiy, Zh. M. Shatilina, and M. A. Timofeyev p. 255 abstract

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