Geozoological characteristics of the ichthyofauna of the water bodies of the Kuban river basin (based on the materials of the Karachay-Cherkess Republic)

The article studies geozoological characteristics of the mountain rivers of the Kuban River basin within the borders of the KarachayCherkess Republic. The water availability of the Karachay-Cherkess Republic stands out from other southern regions of the Russian Federation with a significantly wide network of rivers. There are 419 rivers flowing through the territory of the republic, belonging to two basins: the Azov-Black Sea and the Caspian, and there are also over 130 lakes. All the rivers of the Azov-Black Sea basin are tributaries of various orders of the Kuban River. The largest tributaries of the first order are the rivers: Teberda, Maly Zelenchuk and Bolshoy Zelenchuk, Urup, Laba [4]. Currently, the rivers of the Kuban River basin are well-studied water bodies, however, due to the considerable length of the rivers, their upper reaches have been poorly studied. This is due to the fact that most ichthyological studies are aimed at studying the transformation of the ichthyofauna and the food supply, in connection with the construction of hydraulic structures: reservoirs, canals, hydroelectric power plants, etc. or studying the reduction of populations of sturgeon fish, due to the lack of migration routes. The purpose of this study is to study the ichthyofauna, food supply and habitat of the Upper Kuban and the upper reaches of the tributary river. The object of the study is the hydrobionts of the mountain rivers of the Karachay-Cherkess Republic. During the hydrobiological field research, generally accepted research methods were used. The identification of the fish species was carried out according to the appropriate determinants (Atlas, 2003; Berg, 1948-1949; Kuznetsov, 1973; Veselov, 1977; Kottelat, Freyhof, 2007, etc.), according to the modern classification (Reshetnikov et al., 1997; Reshetnikov et al, 2003; Shakhmurzov et al, 2012; Kottelat, Freyhof, 2007). The collection of aquatic invertebrates was carried out using generally accepted hydrobiological methods (Lipin, 1950; Martynov, 1952; Lepneva, 1968; Lukin, 1976; Fomin, 2000; Tsalolikhin, 1994–2004, etc.). The main result of the work was the compilation of geozoological characteristics of the ichthyofauna of the upper reaches of the Kuban River. Studies of the rivers of the upper reaches of the Kuban River confirm that the ichthyofauna is represented almost exclusively by brook trout.

1. Atlas of freshwater fishes of Russia. Vol.1-2. Moscow: Nauka; 2003. Vol. 1. 379 p. Vol. 2. 253 p.

2. Berg L.S. Freshwater fishes of the USSR and neighboring countries Moscow: Publishing House of the USSR Academy of Sciences; Part 1, 1948. 469 р.

3. Veselov E.A. Determinant of freshwater fishes of the fauna of the USSR. Moscow: Prosveshchenie; 1977. 238 p

4. Gvozdetsky N.A. Physical geography of the Caucasus Part 1 Moscow; 1954. 212 р.

5. Goridchenko T.P. Temporary methodological guidelines for the selection of hydrobiological samples on small rivers Moscow; 1994. 270 р.

6. Kuznetsov B.A. Determinant of vertebrate animals of the fauna of the USSR. Part 1. Fish, amphibians, reptiles. Moscow: Prosveshchenie; 1974. 204 p.

7. Kuchmenova I.I. The hydrological and hydrochemical regime of the main rivers of the Kabardino-Balkarian high-altitude state Reserve in the context of modern climate change Science. Innovations. Technologies. 2024;(4):45-60.

8. Determinant of freshwater algae of the USSR Ed by M.M. Gollerbach. M.-L.: Publishing House of the USSR Academy of Sciences; 1951–1986. Vol. 1–14.

9. Determinant of freshwater invertebrates of the European part of the USSR (plankton and benthos). Ed. by L.A. Kutikova, Ya.I.Starobogatov. L.: Hydrometeoizdat; 1977. 511 p.

10. Determinant of freshwater invertebrates of Russia and adjacent territories. Volume 1. Lower invertebrates. Ed. by S.Ya.Tsalolikhin: Sponges, Cnidarians, Turbellariae, Rotifers, Gastrotrichs, Nematodes, Hairworms, Oligochaetes, Leeches, Bryozoans, Tardigrades. St. Petersburg: ZIN; 1994. 396 p.

11. Determinant of freshwater invertebrates of Russia and adjacent territories. Volume 2. Crustaceans. Ed. by V.R. Alekseev: Decidopods, Branchopods, Copepods, Ostracods, Cumaceans, Mysids, Isopods, Decapods, Amphipods. S.-Pb.: ZIN; 1995. 628 p.

12. Determinant of freshwater invertebrates of Russia and adjacent territories. Volume 5. Higher insects. Ed. by E.P. Narchuk: Brooks, Butterflies, Beetles, Networms. St. Petersburg: ZIN; 2001. 836 p.

13. Determinant of freshwater invertebrates of Russia and adjacent territories. Volume 6. Mollusks, Polychaetes, Nemertines. Ed. by V.V. Bogatov, S.Ya. Tsalolikhin: Bivalves, Gastropods, Polychaetes, Nemertines. 2004. 527 p.

14. Surface water resources of the USSR: Hydrological studies Vol. 8. North Caucasus. Ed. by D.D. Mordukhai-Boltovsky. L.: Gidrometeoizdat; 1964. 309 p.

15. Manual on methods of hydrobiological analysis of surface waters and bottom sediments. Ed. by V.A. Abakumov. L.: Hydrometeoizdat; 1983. 239 p.

16. Pravdin I.F. Guidelines for the study of fish (mainly freshwater). Moscow: Food industry; 1966. 376 p.

17. Kottelat M., Freyhof J. Handbook of European freshwater fishes. Berlin; 2007. 646 p.

18. Stock data of the North Caucasus branch of the Federal State Budgetary Institution Glavrybvod