The effects of hypophysectomy, prolactin therapy and environmental calcium on electrolyte balance of the brown trout Salmo trutta, L.
Adaptation of the brown trout to fresh water containing increasing concentrations of calcium resulted in a decrease in plasma electrolyte level and total electrolyte excretion. The electrolyte excretion rate was higher at the beginning than at the end of the urine collection periods. Hypophysectomized fish had a lower plasma electrolyte concentration than the controls. This deficiency was partially corrected by polactin therapy. High environmental calcium was only effective to a limited extent. There was no difference in the normal renal sodium output between hypophysectomized and intact fish in fresh water. Environmental calcium did not have any significant effect on renal electrolyte output of hypophysectomized fish.
D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D002712:Chlorides / Q000097:blood / Q000652:urine; D007016:Hypophysectomy; D007668:Kidney / Q000502:physiology; D009994:Osmolar Concentration; D010902:Pituitary Gland / Q000502:physiology*; D011188:Potassium / Q000097:blood / Q000652:urine; D011388:Prolactin / Q000494:pharmacology*; D012487:Salmonidae / Q000502:physiology*; D012621:Seasons; D012964:Sodium / Q000097:blood / Q000652:urine; D013696:Temperature; D014337:Trout / Q000097:blood / Q000502:physiology*; D014882:Water-Electrolyte Balance / Q000187:drug effects*
D002712:Chlorides; D011388:Prolactin; D012964:Sodium; D011188:Potassium; D002118:Calcium