Studies on the Osmotic Pressure of Environmental Media and Body fluid of Maine Fish-I

The osmotic pressure of the sea water on the migrating route of pelagic marine fish

Abstract

To clarify the reason for the migratory behaviour of pelagic marine fish, the osmotic pressure of the water mass wherein the fish was caught in relation to the tempeature in situ has been studied on the basis of data obtained by various surveying vessels in the fishing grounds. A high correlation was seen between these factors throughout the seasons for every kind of fish studied. The osmotic pressure of sea water is considered to be closely related with the life of pelagic marine fish. They seem to migrate in the waters having a certain level of osmotic pressure which is proper to each kind of fish and may change as their maturity progresses.