Features of functioning for plankton communities and feeding for pacific salmon in the deep-water areas of Bering and Okhotsk Seas (comparative analysis)
https://doi.org/10.26428/1606-9919-2025-205-710-727
EDN: MMYLJG
Abstract
Species composition, functional structure and production of plankton communities is considered on the long-term data collected in 1986–2022 together with diet and ration for two species of pacific salmon (Oncorhynchus gorbuscha and Oncorhynchus keta) during their feeding in the deep waters of Bering Sea and Okhotsk Sea. Significant regional differences are found for the macroplankton. The functioning of plankton communities in the Okhotsk Sea is more efficient for maintenance of the salmon feeding. Both salmon species consume mainly amphipods, copepods and arrowworms. Bathymetric distribution of plankton and seasonal succession of the plankton communities are different between the seas, so the feeding intensity, daily ration and species composition of diet vary considerably between them, as well. However, high production of large-sized planktonic predators and active transport of zooplankton from outside areas are noted for both regions that provides a stable food base for salmon even in cases when the total production of zooplankton community is low there. The results obtained are important for understanding the feeding abilities for salmon species and the mechanisms of their year-classes yield formation as a basis for the stocks management.
Keywords
Bering Sea,
Okhotsk Sea,
deep water,
zooplankton,
pacific salmon,
feeding,
production of zooplankton,
food base
Supporting agencies: The authors are deeply grateful to their colleagues of TINRO who collected and processed a number of zooplankton and stomach samples, which data are analyzed in the study.
About the Authors
Е. Р. Dulepova
Pacific branch of VNIRO (TINRO)
Russian Federation
Russian Federation
Еlena Р. Dulepova, D.Biol., principal researcher
4, Shevchenko Alley, Vladivostok, 690091
V. V. Napazakov
Pacific branch of VNIRO (TINRO)
Russian Federation
Russian Federation
Vladimir V. Napazakov, Ph.D., head of laboratory
4, Shevchenko Alley, Vladivostok, 690091
References
1. Vinogradov, M.E., Assessment of some characteristics of ocean pelagic communities and their variability, in Sb. nauchn. tr. “Elementy vodnykh ekosistem” (Collect. Sci. Works “Elements of aquatic ecosystems”), Moscow: Nauka, 1978, pp. 3–18.
2. Volvenko, I.V., Morphometric characteristic of standard biostatistical regions for biocenologycal researches of Russian fishing zone on Far East, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2003, vol. 132, pp. 27–42.
3. Volkov, A.F., Opportunities and techniques of using the databases of TINRO “Zooplankton of the north Pacific, Okhotsk, Bering, and Chukchi Seas”, “Nekton trophology”, and “Marine biology”, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2019, vol. 198, pp. 239–261. doi 10.26428/1606-9919-2019-198-239-261.
4. Volkov, A.F., Zooplankton of the epipelagic zone of the Far Eastern seas: community composition, interannual dynamics, and importance in nekton nutrition, Doctoral (Biol.) Dissertation, Vladivostok: TINRO-Tsentr, 1996.
5. Volkov, A.F., Technique of collecting and processing the samples of plankton and the samples on nekton feeding (step-by-step instructions), Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2008, vol. 154, pp. 405–416.
6. Volkov, A.F., Trophological calendar of salmon in the Okhotsk Sea, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2024, vol. 204, no. 3, pp. 683–704. doi 10.26428/1606-9919-2024-204-683-704/ EDN: RCLUVF.
7. Gruzevich, A.K., Arzhanova, N.V., and Sapozhnikov, V.V., Mesoscale eddies over the shelf and continental slope and their influence on the formation of the hydrochemical structure of the Sea of Okhotsk, in Kompleksnye issledovaniya ekosistemy Okhotskogo morya (Complex Studies of the Sea of Okhotsk), Moscow: VNIRO, 1997, pp. 79–86.
8. Darnitsky, V.B. and Bulatov, N.V., Okhotsk Sea eddies of the Kuril region, in Kompleksnye issledovaniya ekosistemy Okhotskogo morya (Complex Studies of the Sea of Okhotsk), Moscow: VNIRO, 1997, pp. 36–39.
9. Dulepova, E.P., Food base of nekton in deep-sea areas of the western Bering Sea: dynamics, current state and its consumption by pacific salmon, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2024, vol. 204, no. 2, pp. 399–414, doi 10.26428/1606-9919-2024-204-399-414. EDN: IRPDRC.
10. Dulepova, E.P., Role of arrowworm Sagitta elegans (Chaetognatha) in plankton communities of the western Bering Sea, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2021, vol. 201, no. 2, pp. 425–439. doi 10.26428/1606-9919-2021-201-425-439.
11. Dulepova, E.P., Sravnitel’naya bioproduktivnost’ makroekosistem dal’nevostochnykh morei (Comparative Bioproductivity of Macroecosystems in Far Eastern Seas), Vladivostok: TINRO-Tsentr, 2002.
12. Dulepova, E.P. and Napazakov, V.V., Functional characteristics and food supply of salmon in deep-water areas of the Sea of Okhotsk in autumn, in Mater. 2 Mezhdunar. nauchno-prakt. konf. “Rybokhozyaystvennyy kompleks Rossii: 300 let rossiyskoy akademicheskoy nauke” (Proc. 2nd Int. scientific-practical. conf. “Fishery complex of Russia: 300 years of Russian academic science”), Moscow: VNIRO, 2024, pp. 131–138.
13. Zaika, V.E., Sravnitel’naya produktivnost’ gidrobiontov (Comparative Productivity of Aquatic Organisms), Kiev: Naukova Dumka, 1983.
14. Sorokin, Yu.I., Mamaeva, T.I., and Sorokin, P.Yu., On the characterization of bacterioplankton in the Bering Sea and in the adjacent northern part of the Pacific Ocean, in Kompleksnye issledovaniya ekosistemy Beringova morya (Complex Studies of Ecosystem of the Bering Sea), Moscow: VNIRO, 1995, pp. 280–286.
15. Chernyavsky, V.I., Zhigalov, I.A., and Matveev, V.I., Oceanological foundations for the formation of zones of high biological productivity, in Gidrometeorologiya i gidrokhimiya morei. T. 9: Okhotskoye more (Hydrometeorology and Hydrochemistry of Seas, vol. 9: Sea of Okhotsk), St. Petersburg: Gidrometeoizdat, 1996, issue 2, pp. 157–160.
16. Shebanova, M.A., Somatic production and life cycles of the Parasagitta elegans sagitta in the Sea of Okhotsk and the Bering Sea, in Mater. 4 mezhdunar. nauchno-tech. conf. “Aktual’nye problemy osvoeniya biologicheskikh resursov Mirovogo okeana” (Proc. 4th Int. Sci. Tech. Conf. “The Actual Problems of Development of Biological Resources of the World Ocean”), Vladivostok: Dal’rybvtuz, 2016, part 1, pp. 218–222.
17. Shebanova, M.A., Chuchukalo, V.I., and Gorbatenko, K.M., Life cycles and somatic production of hyperiids in the Okhotsk and Bering Seas, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2014, vol. 176, pp. 155–176. doi 10.26428/1606-9919-2014-176-155-176.
18. Shebanova, M.A., Chuchukalo, V.I., and Dulepova, E.P., Some features of Eucalanus bungii biology and its production characteristics in the Okhotsk and Bering Seas, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2010, vol. 162, pp. 281–293.
19. Shebanova, M.A., Chuchukalo, V.I., and Dulepova, E.P., Some biological features and productive characteristics of Oithona similis (Copepoda) in the Sea of Okhotsk and western Bering Sea, Russ. J. Mar. Biol., 2011, vol. 37, no. 7, pp. 594–603. doi 10.1134/S1063074011070066.
20. Shuntov, V.P., Some results of the ecosystem study of biological resources in the Far Eastern seas in connection with the objectives of further studies, Bull. N 5 realizatsii “Kontseptsii dal’nevostochnoi basseinovoi programmy izucheniya tikhookeanskikh lososei” (Bull. no. 5 of Realization of the “Concept of the Far Eastern Basin Program for the Study of Pacific Salmon”), Vladivostok: Tikhookean. Nauchno-Issled. Rybokhoz. Tsentr, 2010, pp. 186–195.
21. Shuntov, V.P., Dulepova, E.P., Temnykh, O.S., Volkov, A.F., Naidenko, S.V., Chuchukalo, V.I., and Volvenko, I.V., The status of biological resources in connection with dynamics of macroecosystems in the Far Eastern economic zone of Russia, in Dinamika morskikh ekosistem i sovremennye problemy sokhraneniya bioresursnogo potentsiala morei Rossii (Dynamics of Marine Ecosystems and the Current Problems of Conservation of the Bioresource Potential of the Russian Seas), Vladivostok: Dal’nauka, 2007, pp. 75–176.
22. Shuntov, V.P. and Temnykh, O.S., Tikhookeanskie lososi v morskikh i okeanicheskikh ekosistemakh (Pacific Salmon in Marine and Ocean Ecosystems), Vladivostok: TINRO-Tsentr, 2008, vol. 1.
23. Khen, G.V., Basyuk, E.O., Vanin, N.S., and Matveev, V.I., Hydrography and biological resources in the western Bering Sea, Deep-Sea Res., Part II, 2013, vol. 94, pp. 106–120. doi 10.1016/j.dsr2.2013.03.034.
24. Shuntov, V.P., Dulepova, E.P., Radchenko, V.I., and Lapko, V.V., New data about communities of plankton and nekton of the Far-Eastern seas in connection with climate-oceanological reorganization, Fish. Oceanogr., 1996, vol. 5, no. 1, pp. 38–44.
25. R Core Team, R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing, Vienna, Austria, 2021.
26. Oksanen, J.O., Blanchet, F.G., Friendly, M., Kindt, R., Legendre, P., McGlinn, D.R., Minchin, P., O’Hara, R., Simpson, G.L., Solymos, P., Stevens, M.H., Szoecs, E., and Wagner, H., Vegan: Community Ecology Package. R package Version 2.5-7. URL https://cran.r-project.org, https://github.com/vegandevs/vegan.2020. Cited September, 30, 2025.
27. Wickham, H., ggplot2: Elegant Graphics for Data Analysis, New York, 2016, 2nd ed. Herve, M., Aide-mémoire de statistique appliquée à la biologie. Construire son étude et analyser les résultats àl’aide du logiciel R. Version finale. http://cran.r-project.org/doc/contrib/Herve-Aidememoire-statistique.pdf. Cited September, 30, 2025.
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For citations:
Dulepova Е.Р., Napazakov V.V. Features of functioning for plankton communities and feeding for pacific salmon in the deep-water areas of Bering and Okhotsk Seas (comparative analysis). Izvestiya TINRO. 2025;205(4):710-727. (In Russ.) https://doi.org/10.26428/1606-9919-2025-205-710-727. EDN: MMYLJG
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