CORTISOL LEVEL AND Na+/K+-ATPASE ACTIVITY DURING GROWTH AND DEVELOPMENT OF JUVENILE DAUBED SHANNY LEPTOCLINUS MACULATUS (FRIES, 1838) IN THE ARCTIC

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Abstract

The dynamics of cortisol level and Na+/K+-ATPase (NKA) activity that are associated with the maintenance of cell ion homeostasis was studied in skeletal muscles of juvenile circumpolar fish daubed shanny Leptoclinus maculatus (Fries, 1838), an ecologically significant representative of the ichthyofauna of the Arctic Svalbard archipelago. It has been established that the level of cortisol and NKA activity decrease during the development of daubed shanny juveniles from L2 stage pelagic juveniles of L5 stage, which are mainly demersal. The results obtained suggest that cortisol may be involved in the regulation of the activity of one of the main osmoregulatory factors, NKA. This may be important for the growth and adaptation of pelagic juveniles of daubed shanny to the demersal habitat during postembryonic development in the Arctic.

About the authors

N. L. Rendakov

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences

Author for correspondence.
Email: nlrend@mail.ru
Russian Federation, Petrozavodsk

E. I. Kaivarainen

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences

Email: nlrend@mail.ru
Russian Federation, Petrozavodsk

S. N. Pekkoeva

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences

Email: nlrend@mail.ru
Russian Federation, Petrozavodsk

S. A. Murzina

Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences

Email: nlrend@mail.ru
Russian Federation, Petrozavodsk

K. M. Nikerova

Forest Research Institute of the Karelian Research Centre of the Russian Academy of Sciences

Email: nlrend@mail.ru
Russian Federation, Petrozavodsk

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Copyright (c) 2023 Н.Л. Рендаков, Е.И. Кяйвяряйнен, С.Н. Пеккоева, С.А. Мурзина, К.М. Никерова

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