Cortisol Content and Na+/K+-ATPase Activity under Adaptation of Juvenile Pink Salmon Oncorhynchus gorbuscha (Salmonidae) to Salinity Changes

Autor:	E. I. Kaivarainen, Nina N. Nemova, N. L. Rendakov, Denis Efremov, K. M. Nikerova
Rok vydání:	2021
Předmět:	endocrine system biology Chemistry Aquatic Science biology.organism_classification Salinity Animal science Salt water Oncorhynchus Juvenile Seawater Adaptation General Agricultural and Biological Sciences Na k atpase activity hormones hormone substitutes and hormone antagonists Salmonidae
Zdroj:	Journal of Ichthyology. 61:771-778
ISSN:	1555-6425 0032-9452
Popis:	The experimental study yielded new data on changes in the activity of Na+/K+-ATPase and the level of cortisol in juvenile pink salmon Oncorhynchus gorbuscha that left the spawning nests (Olkhovka River, White Sea basin) during their transfer from fresh water to sea water (25‰) and back. The development of tolerance to increased salinity in juvenile pink salmon is accompanied by activation of Na+/K+-ATPase after 1 h and 24 h of maintaining in seawater and by cortisol content increase after 1 h of this exposure, followed by a return to the initial level after 24 h. The results obtained indicate the readiness of juvenile pink salmon to downstream migration into the marine environment immediately after leaving spawning nests. With the subsequent transfer of fish from salt water to freshwater after 24 h, the activity of Na+/K+-ATPase and the content of cortisol in them decrease, which may indicate the plasticity of the osmoregulatory reaction of pink salmon smolts.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c537995ec762483a12026f8850793290 https://doi.org/10.1134/s0032945221050118 Zobrazit plný text záznamu Full text from SpringerLink