The time course of sea water acclimation of the teleost, Dormitator maculatus has been investigated by transferring fresh water acclimated individuals into 50% sea water for 24 hr and thence into full strength sea water. At various times after the initial transfer from fresh water, individuals were removed and assayed for either potassium stimulation of sodium efflux or gill tissue activity of the enzyme Na/K activated ATPase. If an early, rapid increase in total cellular protein is taken into account, it can be shown that the time course of the activation of potassium stimulated sodium efflux is approximately the same as the time course of the activation of the enzyme. Such parallel activation supports the view that Na/K activated ATPase is functionally linked to sodium extrusion by this species.
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Animal Science and Zoology