1. Diatom Algae (Bacillariophyta) in Rock Pools on Islands and Shore of the Kandalaksha Gulf, White Sea

   • S. I. Genkal
   • N. V. Vekhov

   AQUATIC FLORA AND FAUNA 22 June 2021 Pages: 241 - 246

   

2. Two Nematode Species New to Science of Genus Daptonema (Nematoda, Monhysterida) Found in Artificial Reservoirs in Vietnam

   • V. G. Gagarin

   BIOLOGY, MORPHOLOGY, AND SYSTEMATICS OF HYDROBIONTS 22 June 2021 Pages: 247 - 255

   

3. Variability of Karyofunds of Chironomus plumosus (Diptera, Chironomidae) from the Rybinsk Reservoir during the Period of Climate Warming

   • V. V. Bolshakov

   BIOLOGY, MORPHOLOGY, AND SYSTEMATICS OF HYDROBIONTS 22 June 2021 Pages: 256 - 262

4. Taxonomic Composition and Distribution of Alien Suckermouth Armored Catfish (Siluriformes: Loricariidae) in Southern Vietnam

   • I. A. Stolbunov
   • Tran Duc Dien
   • D. P. Karabanov

   BIOLOGY, MORPHOLOGY, AND SYSTEMATICS OF HYDROBIONTS 22 June 2021 Pages: 263 - 273

   

5. Change in Abundance and Activity of Microbocenoses in the Area of Influence of a Large Landslide at the Bureya Reservoir

   • L. M. Kondratyeva
   • Z. N. Litvinenko
   • A. S. Bashkurova

   WATER MICROBIOLOGY Open access 22 June 2021 Pages: 274 - 283

   

6. Colonial Invertebrates in the Zooperiphyton of the Cooling Pond of Combined Heat and Power Plant (Western Siberia)

   • A. A. Gerasimova
   • A. G. Gerasimov
   • T. A. Sharapova

   ZOOPLANKTON, ZOOBENTHOS, AND ZOOPERIPHYTON 22 June 2021 Pages: 284 - 290

   

7. Species and Ecological Diversity of Pechora River Basin Ichthyofauna

   • A. P. Novoselov

   ICHTHYOLOGY 22 June 2021 Pages: 291 - 300

   

8. Freshwater Trematodes Sanguinicola (Digenea: Aporocotylidae) in Europe: Distribution, Host Range, and Characteristics of Fish and Snail Infestation (Review)

   • A. E. Zhokhov
   • M. N. Pugacheva
   • L. G. Poddubnaya

   PARASITOLOGY OF HYDROBIONTS Open access 22 June 2021 Pages: 301 - 315

   

9. Life Cycle of Cosmocerca ornata (Nematoda: Cosmocercidae), a Parasite of Amphibians

   • N. Yu. Kirillova
   • A. A. Kirillov

   PARASITOLOGY OF HYDROBIONTS 22 June 2021 Pages: 316 - 330

   

10. Long-Term Consequences of the Effect of Copper and an Electromagnetic Field on the Size and Weight Parameters and Activity of Digestive Glycosidases in Underyearlings of Roach Rutilus rutilus

    • I. L. Golovanova
    • A. A. Filippov
    • V. V. Krylov

    ECOLOGICAL PHYSIOLOGY AND BIOCHEMISTRY OF AQUATIC ORGANISMS 22 June 2021 Pages: 331 - 339

11. Using the Integral Index to Assess Destabilization Processes in the Immune System of Fish

    • V. R. Mikryakov
    • V. G. Tereshchenko
    • D. V. Mikryakov

    METHODS OF RESEARCH 22 June 2021 Pages: 340 - 348