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Biol Bull 130: 430-441. (June 1966)
© 1966 Marine Biological Laboratory
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EFFECT OF HYPOPHYSECTOMY ON THE FUNCTION OF THE KIDNEY OF THE EURYHALINE TELEOST, FUNDULUS KANSAE

JON G. STANLEY 1 and W. R. FLEMING 1

1 Zoology Department, University of Missouri, Columbia, Missouri 65202

Hypophysectomy has been shown to affect the pattern of urine formation and excretion by the euryhaline killifish, Fundulus kansae. Changes noted in fresh water include (a) a drop in urine volume, (b) a rise in osmotic pressure, due in part to increased concentrations of sodium and potassium in the urine, and (c) a marked increase in the time required to shut off urine flow when transferred suddenly from fresh water to sea water. Hypophysectomized animals in fresh water also show a slight but consistent reduction in the osmotic pressure of the serum. Pre-exposure to saline increases the ability of hypophysectomized animals to respond to an osmotic challenge, but they do not respond as well as their controls.




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H. A. Bern
Hormones and Endocrine Glands of Fishes: Studies of fish endocrinology reveal major physiologic and evolutionary problems
Science, October 27, 1967; 158(3800): 455 - 462.
[Abstract] [PDF]


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Copyright © 1966 by the Marine Biological Laboratory.