Results of Hydrological, Hydrochemical and Biological Studies in the Waters of the Mussel and Oyster Farm in 2023–2024 (Black Sea, the Resort Town of Koreiz)

S. V. Shchurov*, N. V. Pospelova, O. A. Troshchenko, N. P. Kovrigina, E. V. Lisitskaya, A. S. Priymak

A. O. Kovalevsky Institute of Biology of the Southern Seas, RAS, Sevastopol, Russia

* e-mail: shchur@ibss-ras.ru

Abstract

The paper presents results of comprehensive hydrological, hydrochemical and hydrobiological investigations of the coastal waters off Koreiz (Southern Coast of Crimea, Black Sea). In 2023–2024, a total of six seasonal sampling sessions were conducted within the area near a mussel and oyster farm, thus ensuring comprehensive coverage of all seasons. In the surface layer (0–0.5 m), 61 samples were collected, and 720 hydrochemical analyses were performed. Phytoplankton was sampled at stations 1–5 in the surface layer. Meroplankton samples were collected with a Juday net (entry ring diameter 36 cm, gas size no. 49) in the 0–10 m layer at coastal stations 1, 5 and 7. It was shown that the temperature and salinity levels of the surface layer during the study period exhibited a consistent increase compared to the long-term means for the Yalta area. However, these parameters remained within the range 7–25°С and 17–20‰, which is conducive for cultivation of bivalve molluscs. The dissolved oxygen concentrations in all seasons remained substantially above the threshold values specified by fisheries water quality standards. The values of five-day biochemical oxygen demand (BOD5) and the pollution coefficient Kz corresponded to the category of “unpolluted” waters. Concentrations of inorganic forms of nitrogen and phosphorus were in most cases low and spatially homogeneous. The local hotspots of elevated ammonium, nitrate and organic nitrogen and phosphorus were identified in the mussel and oyster farm area and a coastal station influenced by domestic wastewater. In the phytoplankton, 77 microalgal species were identified; diatoms dominated numerically throughout the year, while in the cold and spring seasons a substantial part of the biomass was formed by taxa considered food for mussels and oysters. The meroplankton community was found to comprise larvae of 43 benthic invertebrate species; larvae of the cultivated bivalves Mytilus galloprovincialis and Magallana gigas occurred within the temperature ranges characteristic of these species. The obtained data indicate that the coastal waters off Koreiz can be regarded as an environmentally favourable area for the operation of a mussel and oyster farm.

Keywords

hydrochemical indicators, phytoplankton, meroplankton, mariculture, Black Sea

Acknowledgments

This work was carried out within the framework of the state assignment of IBSS “Comprehensive study of the functioning mechanisms of marine biotechnological complexes with the aim of obtaining bioactive substances from hydrobionts” (124022400152-1).

About the authors

Sergey V. Shchurov, Researcher, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS (2 Nakhimov Ave., Sevastopol, 299011, Russia), ORCID ID: 0000-0002-8913-2637, Scopus Author ID: 57214992790, ResearcherID: AAC-9044-2022, shchur@ibss-ras.ru

Natalia V. Pospelova, Leading Researcher, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS (2 Nakhimov Ave., Sevastopol, 299011, Russia), PhD (Biol.), ORCID ID: 0000-0002-3165-2090, Scopus Author ID: 56884605100, ResearcherID: C-7572-2016, nv.pospelova@ibss-ras.ru

Oleg A. Troshchenko, Senior Researcher, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS (2 Nakhimov Ave., Sevastopol, 299011, Russia), PhD (Geogr.), ORCID ID: 0000-0001-5200-9996, Scopus Author ID: 57218589904, ResearcherID: AAC-9364-2022, oleg_tr59@mail.ru

Nelya P. Kovrigina, Senior Researcher, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS (2 Nakhimov Ave., Sevastopol, 299011, Russia), PhD (Geogr.), ORCID ID: 0000-0002-6734-8285, Scopus Author ID: 6507114864, ResearcherID: AAC-9395-2022, npkovrigina@yandex.ru

Elena V. Lisitskaya, Senior Researcher, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS (2 Nakhimov Ave., Sevastopol, 299011, Russia), PhD (Biol.), ORCID ID: 0000-0002-8219-4616, Scopus Author ID: 6504112143, ResearcherID: T-1970-2017, lisitskaya@ibss.su

Anastasia S. Priymak, Junior Researcher, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS (2 Nakhimov Ave., Sevastopol, 299011, Russia), ORCID ID: 0000-0003-4366-474X, Scopus Author ID: 57215722245, ResearcherID: A-5754-2019, priymaklimova@ibss-ras.ru

For citation

Shchurov, S.V., Pospelova, N.V., Troshchenko, O.A., Kovrigina, N.P., Lisitskaya, E.V. and Priymak, A.S., 2026. Results of Hydrological, Hydrochemical and Biological Studies in the Waters of the Mussel and Oyster Farm in 2023–2024 (Black Sea, the Resort Town of Koreiz). Ecological Safety of Coastal and Shelf Zones of Sea, (2), pp. 76–92.

References

  1. Pospelova, N.V. and Priimak, A.S., 2021. The Feeding of Mytilus galloprovincialis Lam. Cultivating in Coastal Waters of Sevastopol. Proceedings of the T. I. Vyazemsky Karadag Scientific Station – Nature Reserve of the Russian Academy of Sciences, 6(1), pp. 24–34. https://doi.org/10.21072/eco.2021.17.03 (in Russian).
  2. Ryabushko, L.I., Pospelova, N.V., Balycheva, D.S., Kovrigina, N.P., Troshchenko, O.A. and Kapranov, S.V., 2017. Epizoon Microalgae of the Cultivated Mollusk Мytilus galloprovincialis Lam. 1819, Phytoplankton, Hydrological and Hydrochemical Characteristics in the Mussel-and-Oyster Farm Area (Sevastopol, Black Sea). Marine Biological Journal, 2(4), pp. 67–83. https://doi.org/10.21072/mbj.2017.02.4.07 (in Russian).
  3. Blanco, J., 2018. Accumulation of Dinophysis Toxins in Bivalve Molluscs. Toxins, 10(11), 453. https://doi.org/10.3390/toxins10110453
  4. Reguera, B., Riobó, P., Rodríguez, F., Díaz, P.A., Pizarro, G., Paz, B., Franco, J.M. and Blanco, J., 2014. Dinophysis Toxins: Causative Organisms, Distribution and Fate in Shellfish. Marine Drugs, 12(1), pp. 394–461. https://doi.org/10.3390/md12010394
  5. Holodov, V.I., Pirkova, A.V. and Ladygina, L.V., 2017. Cultivation of Mussels and Oysters in the Black Sea. Voronezh: OOO “IZDAT-PRINT”, 508 p. (in Russian).
  6. Troshchenko, O.A., Kuftarkova, E.A., Lisitskaya, T.V., Pospelova, N.V., Rodionova, N.Yu., Subbotin, A.A. and Eremin, I.Yu., 2012. Results of Complex Ecological Research on the Mussel-Oyster Far, Waters of (the Blue Bay, Crimea, the Black Sea). Ecological Safety of Coastal and Shelf Zones and Comprehensive Use of Shelf Resources, 26(1), pp. 291–309 (in Russian).
  7. Ryabushko, V.I., Shchurov, S.V., Kovrigina, N.P., Lisitskaya, E.V. and Pospelova, N.V., 2020. Comprehensive Research of the Environmental Status of Coastal Waters of Sevastopol (Western Crimea, Black Sea). Ecological Safety of Coastal and Shelf Zones of Sea, (1), pp. 104–119. https://doi.org/10.22449/2413-5577-2020-1-104-119 (in Russian).
  8. Ryabushko, V.I., Shchurov, S.V., Kovrigina, N.P., and Popov, М.А., 2021. Hydrological, Hydrochemical and Hydrobiological Studies of Lake Donuzlav (Western Crimea, Black Sea) based on the Results of Expeditions in 2018. Ecological Safety of Coastal and Shelf Zones of Sea, (2), pp. 80–93. https://doi.org/10.22449/2413-5577-2021-2-80-93 (in Russian).
  9. Mezentseva, I.V., Sovga, E.E. and Khmara, T.V., 2025. Self-Purification Capacity of the Yalta Port Ecosystem in Relation to Inorganic Forms of Nitrogen for 2012–2022. Ecological Safety of Coastal and Shelf Zones of Sea, (3), pp. 41–53.
  10. Lyakh, A.M. and Bryantseva, Yu.V., 2001. Computer's Program for the Calculation of Basic Phytoplankton Parameters. Ecology of the Sea, 58, pp. 87–90 (in Russian).
  11. Lisitskaya, E.V. and Shchurov, S.V., 2024. The First Record of Larval Crassostrea gigas (Thunberg 1793) (Bivalvia, Ostreidae) from the Black Sea. Zoologicheskiy zhurnal, 103(5), pp. 11–15. https://doi.org/10.31857/S0044513424050028 (in Russian).
  12. Ilyin, Yu.P., Repetin, L.N., Belokopytov, V.N., Goryachkin, Yu.N., Dyakov, N.N., Kubryakov, A.A. and Stanichny, S.V., 2012. Hydrometeorological Conditions of the Ukrainian Seas. Vol. 2. The Black Sea. Sevastopol: ECOSI-Gidrofizika, 421 p. (in Russian).
  13. Belokopytov, V.N. and Zhuk, E.V., 2024. Climatic Variability of the Black Sea Thermohaline Characteristics (1950–2023). Physical Oceanography, 31(6), pp. 788–801.
  14. Kapranov, S.V., Kovrigina, N.P., Troshchenko, O.A. and Rodionova, N.Yu., 2020. Long-Term Variations of Thermohaline and Hydrochemical Characteristics in the Mussel Farm Area in the Coastal Waters off Sevastopol (Black Sea) in 2001–2018. Continental Shelf Research, 206, 104185. https://doi.org/10.1016/j.csr.2020.104185
  15. Keskin, İ., Ekici, A. and Serdar, S., 2020. Determination of the Growth Performance of Mytilus Galloprovincialis in Nets at Gökçeada Island. The European Zoological Journal, 87(1), pp. 559–570. https://doi.org/10.1080/24750263.2020.1818856
  16. Stelmakh, L., Kovrigina, N. and Gorbunova, T., 2023. Phytoplankton Seasonal Dynamics under Conditions of Climate Change and Anthropogenic Pollution in the Western Coastal Waters of the Black Sea (Sevastopol Region). Journal of Marine Science and Engineering, 11(3), 569. https://doi.org/10.3390/jmse11030569
  17. Silkin, V., Mikaelyan, A.S., Pautova, L. and Fedorov, A., 2021. Annual Dynamics of Phytoplankton in the Black Sea in Relation to Wind Exposure. Journal of Marine Science and Engineering, 9(12), 1435. https://doi.org/10.3390/jmse9121435
  18. Gagnaire, B., Frouin, H., Moreau, K., Thomas-Guyon, H. and Renault, T., 2006. Effects of Temperature and Salinity on Haemocyte Activities of the Pacific Oyster, Crassostrea gigas (Thunberg). Fish and Shellfish Immunology, 20(4), pp. 536–547. https://doi.org/10.1016/j.fsi.2005.07.003
  19. Heo, J.-M., Kim, S.-S., Kim, D.-Y., Lee, S.W., Lee, J.S., Kang, M.H. and Kim, S.E., 2023. Impact of Exposure Temperature Rise on Mass Mortality of Tidal Flat Pacific Oysters. Frontiers in Marine Science, 10, 1275521. https://doi.org/10.3389/fmars.2023.1275521
  20. King, N.G., Wilmes, S.B., Smyth, D., Tinker, J., Robins, P.E., Thorpe, J., Jones, L., Malham, S.K., 2021. Climate Change Accelerates Range Expansion of the Invasive Non-Native Species, the Pacific Oyster, Crassostrea gigas. ICES Journal of Marine Science, 78(1), pp. 70–81. https://doi.org/10.1093/icesjms/fsaa189

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