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Water and Ionic Regulation

Water and Ionic Regulation

(p.83) Chapter 4 Water and Ionic Regulation
The Biology of Sharks and Rays
A. Peter Klimley
University of Chicago Press

This chapter describes the internal hydro-mineral balance of the sharks, rays, and chimaeras, with special attention given to how species regulate the salt composition of their tissues in order to temporarily inhabit estuarine and freshwater environments or reside wholly in the freshwater environment. The discussion covers the process of osmoregulation and the osmoregulatory organs (rectal gland, kidney, gills).

Keywords:   sharks, rays, chimaeras, salt composition, osmoregulation, osmoregulatory organs

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