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Seasonal Variability of the Size Structure of Calanus sp. Populations in Spitsbergen Waters

  • MARINE BIOLOGY
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Oceanology Aims and scope

Abstract

The seasonal and spatial variability of the size structure of Calanus sp. populations was compared in two fjords of Western Spitsbergen. The size structure of the copepodite stages IV and V differed significantly in summer and late autumn. The differences between the populations from Grenfjord and Billefjord were less pronounced due to the local heterogeneity of environmental factors. Selective elimination of large individuals by the animals of a higher trophic levels, individual changes in the body size of individuals as fat reserves were accumulated/metabolized, and the presence of two generations with different size characteristics were considered the reasons of seasonal variability described above.

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ACKNOWLEDGMENTS

We express our deep gratitude to the team and scientific group of the R/V Dalnie Zelentsy for their invaluable help in sampling. Special thanks go to T.M. Maksimovskaya and A.A. Deryabin (MMBI RAS) for oceanographic data.

The authors acknowledge K.N. Kosobokova for her genuine interest and valuable comments, which both improved the original version of the manuscript significantly and outlined a number of directions for further research within and beyond the considered topic.

Funding

The study was funded by the Ministry of Science and Higher Education of the Russian Federation and was carried out within the state task of MMBI RAS (topic no. 121091600105-4, state registration no. FMEE-2021-0029 (0188-2021-0029)).

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Authors and Affiliations

  1. Murmansk Marine Biological Institute, Russian Academy of Sciences, Murmansk, Russia

    I. V. Berchenko & E. I. Druzhkova

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  1. I. V. Berchenko
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  2. E. I. Druzhkova
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Correspondence to I. V. Berchenko or E. I. Druzhkova.

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Translated by D. Martynova

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Berchenko, I.V., Druzhkova, E.I. Seasonal Variability of the Size Structure of Calanus sp. Populations in Spitsbergen Waters. Oceanology 63, 45–53 (2023). https://doi.org/10.1134/S0001437023010010

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  • DOI: https://doi.org/10.1134/S0001437023010010

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