In Vivo Changes in the Activity of (Gill, Brain and RBC) ATPases from Oreochromis mossambicus as a Response of Environmental Ionic Changes

The study concerns with the effects of different ionic strength concentrations of NaCl in fish environment on the in vivo activity of Na^+, K^+-ATPase from the gills, brain and red blood cells oftilipia, Oreochromis mossambicus. The most important changes in Na^+, K^+-ATPase activity during exposure to the NaCl concentrations were represented by an increase in the brain and a decrease in gills and RBC Na^+, K^+-ATPases activity at higher concentrations. Total protein concentrations of gills and brain homogenates were decreased but increased in RBC s homogenates at higher ionic strengths.