title: Ion and water turnover in the fresh-water elasmobranch Potamotrygon sp.
mesh_terms: D000818:Animals; D002712:Chlorides / Q000378:metabolism* / Q000652:urine; D005399:Fishes / Q000378:metabolism*; D007700:Kinetics; D011868:Radioisotopes; D012964:Sodium / Q000378:metabolism*; D014554:Urination; D014867:Water / Q000378:metabolism*
chemical_list: D002712:Chlorides; D011868:Radioisotopes; D014867:Water; D012964:Sodium