Abstract
The entirely marine hagfishes, living in water of full salinity and often at considerable depths, maintain their body fluids at concentrations close to, if not completely identical with those of their environment (Robertson, 1954). Thus, like the marine invertebrates and protochordates they are described as isosmotic and osmotic conformers. While they are in freshwater, lampreys on the other hand must be able to sustain their body fluids at concentrations far above those of the environment (hyperosmotic regulation), whereas in their marine phase they maintain internal concentrations little more than a third of those of the sea water (hyposmotic regulation).
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
