The effect of pollutants on the ichthyofauna of Lake Ladoga and preventive measures

Lake Ladoga is the largest body of water in Europe with huge reserves of drinking water, and has a particularly important sanitary and hygienic significance for the Northwestern region of Russia. The lake has significant fishery importance – annual catches reached 6000 tons. per year. However, over the past few decades, the fishery status of the reservoir has changed significantly. Stocks and catches of the most valuable fish species have sharply decreased as a result of anthropogenic impact – pollution and eutrophication.
Chemical-analytical studies of samples of water, bottom sediments, atmospheric precipitation and fish for metals were carried out in the laboratory of fishery ecology of the St. Petersburg branch of the Federal State Budgetary Institution "VNIRO" ("GosNIORH" named after L.S. Berg) on an atomic absorption spectrophotometer AA - 7000 (Shimadzu) according to approved methods (PNDF., 2010; M02-2406., 2013 and M02-902-125, 2005), and in the research laboratory of food and natural objects "ANALECT" of the Institute of the Ministry of Health of the Russian Federation, using the method of atomic absorption spectrometry according to approved methods. Hydrochemical and hydrological parameters were determined using an automatic multiparameter probe Aqua TROLL 500.
The southern water area of the lake, which is the most valuable in terms of fisheries, turned out to be the most vulnerable to toxicological effects. Pollution of spawning grounds, toxicosis of fish, violation of natural reproduction in combination with the hydrological features of the reservoir have led to irreversible transformations in the structure of the ichthyofauna as a whole for the entire lake. Pronounced consequences for the ichthyofauna of the reservoir are associated with the sensitivity of fish to pollutants, their ability to accumulate pathological information over a long-life cycle. The hydrological features of the southern water area of Lake Ladoga, combined with the location of pollution sources and the routes of pollutants, make it difficult to carry out preventive measures in this most important fishery area.

1. Moiseenko, T.I. Aquatic ecotoxicology, theoretical and practical aspects / T.I. Moiseenko. – Moscow. Science. - 2009. – 399 p.

2. Rumyantsev V.A. Ladoga Lake: characteristics, ecological state / V.A. Rumyantsev, L.A. Kudersky // // Society, environment, development. - 2010 - No.4. — pp.171-182.

3. Naumenko, M.A. Morphometry and features of the hydrological regime / M.A. Naumenko, S.G. Karetnikov // Ladoga Lake: past, present, future. –St. Petersburg: Nauka, 2002. – pp. 16-49.

4. Arshanitsa, N.M. Materials of ichthyotoxicological studies in the Ladoga Lake basin / N.M. Arshanitsa // Collection of scientific papers of GosNIORH. – 1988. – Issue 285. – 138 p

5. Drabkova V.G. The current state and environmental problems of Lake Ladoga/ V.G. Drabkova // Collection of scientific papers "Reliable protection of Lake Ladoga". –ST. PETERSBURG - 2009. – pp. 50-62.

6. Arshanitsa N.M. Species sensitivity of fish to certain types of pollution of reservoirs / N.M. Arshanitsa, B.K. Karimov// Materials of the All-Russian Scientific Conference Conf. "Ecological problems of freshwater fisheries reservoirs in Russia. – St. PETERSBURG. – 2011. - pp. 35-40.

7. Fedorova, G.V. The effect of anthropogenic factors on different parts of the ecosystem of the Lake Ladoga basin / G.V. Fedorova, Arshanitsa N.M. // Collection of scientific works of GosNIORH. – 1988. – Issue 285. – pp. 3-11.

8. Ogorodnikova, V.A. Distribution and abundance of early juveniles of mass fish species in the southern part of Lake Ladoga / V.A. Ogorodnikova, O.N. Susloparova // Collection of scientific papers of GosNIORH. - 1995. – Issue 314. – pp. 231-247.

9. Grebtsov, M.R. Ecological and toxicological state of the Volkhov bay of Lake Ladoga / M.R. Grebtsov // Issues of regulatory regulation in veterinary medicine. - 2014. – No. 3. – pp. 239-245.

10. Stekolnikov, A.A. Features of the seasonal ecological and toxicological state of the Volkhov River / A.A. Stekolnikov // Issues of regulatory regulation in veterinary medicine. - 2014. – No. 3. – pp. 236-241.

11. Grebtsov, M.R. Seasonal features of the ecological and toxicological regime of the Volkhov bay of Lake Ladoga / M.R. Grebtsov // Issues of regulatory regulation in veterinary medicine. - 2013. – No. 4. – pp. 65-70.

12. Grebtsov, M.R. Metal content in fish of the Volkhov bay of Lake Ladoga and their habitat / M.R. Grebtsov // Issues of regulatory regulation in veterinary medicine. – 2013. – No. 4. – pp. 70-74

13. Grebtsov, M.R. Ecological and toxicological assessment of the aerogenic pathway of surface water pollution / M.R. Grebtsov, A.A. Stekolnikov // International Bulletin of Veterinary Medicine. – St. Petersburg, 2013. – No. 1. – pp. 47-51.

14. Stekolnikov A.A. On the issue of the seasonal state of the fish of the Volkhov River. Issues of regulatory regulation in veterinary medicine. - 2013. -No.4-pp.62-65.

15. State report on the state and protection of the environment of St. Petersburg and the Leningrad region in 2002 – St. Petersburg – 2003.

16. Alkhimenko, A.P. Ladoga needs a law on labor protection / A.P. Alkhimenko, V.A. Rumyantsev // Ladoga Lake – reliable protection. – St. Petersburg: Institute of Lake Science of the Russian Academy of Sciences, 2009. – pp. 4-13.

17. Leonov, A.G. Fish resources of Lake Ladoga and their use at the beginning of the XXI century / A.G. Leonov, A.Ya. Tesl // The study of large lakes in the North-West of the European part of Russia. – St. Petersburg, 2009. – pp. 121-136

18. Kudersky, L.A. Environmental problems of Ladoga: the concept of the federal law on the protection of the natural environment of Lake Ladoga and its basin Selected works. Research on ichthyology, fisheries and mixed disciplines/ L.A. Kudersky // Collection of scientific papers of the Federal State Scientific Research University "GosNIORH". - 2013. -Issue 342. -- p. 526

19. Kudersky, L.A. The state of fish resources of Lake Ladoga/ L.A. Kudersky // Collection Ladoga Lake – St. Petersburg. - 2009. –pp. 73-85.

20. Kurashov, E.A. Littoral zone of Lake Ladoga / E.A. Kurashov. – St. Petersburg: Nestor-Istoriya, 2011. – p. 415.

21. Romanov, A.Yu. Ecological and ichthyotoxicological state of the southern water area of Lake Ladoga / A.Yu. Romanov, N.M. Arshanitsa// International Bulletin of Veterinary Medicine. – St. Petersburg. – 2023. – No. 2. – pp. 171-178

22. Romanov A.Yu. Pathomorphological state of fish in the southern waters of Lake Ladoga / A.Yu. Romanov, D.D. Karpov, N.M. Arshanitsa, O.V. Zelennikov // International Bulletin of Veterinary Medicine. – St. Petersburg. – 2023. – No. 3. – pp.218-223

23. Romanov A.Yu. The influence of pollution on fish reproduction in the southern waters of Lake Ladoga / A.Yu. Romanov, N.M. Arshanitsa, // International Bulletin of Veterinary Medicine. – St. Petersburg. – 2023. – No. 3. – Pp.156–163

24. Romanov, A.Yu. Ecological and ichthyotoxicological state of the southern water area of Lake Ladoga // International Bulletin of Veterinary Medicine. – St. Petersburg. – 2023. – No. 2. – pp. 171-178.

25. Raspopov I.M. The role of the littoral zone in assessing the state of the ecosystem of Lake Ladoga / I.M. Raspopov, I.N. Andronikova // Lake Ladoga: past, present, future. –St. Petersburg: Nauka, 2002. – pp. 264-268.

26. Arshanitsa, N.M. Pathomorphological analysis in field and experimental conditions / N.M. Arshanitsa, L.A. Lesnikov // Methods of ichthyotoxicological research. - 1987. – pp. 7-9.

27. Arshanitsa, N.M. The influence of a toxicological factor on the condition of fish in early ontogenesis in fish hatcheries / N.M. Arshanitsa, D.A. Sidenkov // Collection of scientific papers of the All-Russian Conference. Ulyanovsk. - 2007. –pp. 209-214.

28. Rumyantsev, V.A. Formation of the water quality of Lake Ladoga in modern conditions as the basis of its fish resources. Research on ichthyology and related disciplines in inland waters at the beginning of the XXI century / V.A. Rumyantsev // Collection of scientific papers of GosNIORH. - 2007. – Issue 337. St. Petersburg. – Moscow – pp. 472-483.

29. Roskin G.N. Microscopic technique/G.N.Roskin, L.B. Levinson// M. – 1957 – 468s.

30. Polenov A.L. Hypothalamic neurosecretion / A.L. Polenov // L. – Nauka – 1971 – 168 P.