Figure 4. Na+/K+-ATPase activity in individual gills of the octopus O. ocellatus exposed to brackish water.
Octopus gills shown on the right side only (A). Dissection from the ventral surface; the dorsal aorta running forward from the systemic heart is concealed in this view. Na+/K+-ATPase activity in individual gills of the octopus O. ocellatus exposed to 20-ppt brackish water for 1 day and 1 week (B). Values are means ± SEM, n = 6–10 animals. Representative results of two independent experiments are shown. *P < 0.05 vs. 30-ppt seawater control at a given time point.