Ionic regulation and Na + ,K + ‐ATPase activity in gills and kidney of the Antarctic aglomerular cod icefish exposed to dilute sea water

• Published in: Journal of Fish Biology
• Main Authors: Romão, S., Freire, C. A., Fanta, E.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2001
• Subjects: Antarctic; The Antarctic; Antarc*; Icefish
• Online Access: http://dx.doi.org/10.1111/j.1095-8649.2001.tb00146.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2001.tb00146.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2001.tb00146.x

When Notothenia neglecta was exposed to diluted, half strength, sea water for 6 h or 10 days, serum concentrations of Cl ‐ , Na + , K + and Mg 2+ did not differ from those of sea water controls. This indicates that the fish were capable of both short‐ and long‐term regulation. Renal Na + ,K + ‐ATPase activity decreased after a 6 h exposure to diluted sea water, but there were no differences between diluted sea water and controls after 10 days of exposure.