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Journal of Experimental Biology 40,335-341 (1963)
Published by Company of Biologists 1963

Studies on the Glomerular Filtration Rate of Rainbow Trout (Salmo Gairdneri)

W. N. HOLMES ¹ and R. L. McBEAN ¹

¹ Department of Zoology, University of British Columbia, Vancouver, Canada

1. Variations in the glomerular filtration rate (G.F.R.) and the renal tubular reabsorption of water are probably important factors in the homoiostatic mechanisms associated with the euryhalinity of the rainbow trout (Salmo gairdneri).

2. The observed reduction in urine flow after the adaptation of rainbow trout to sea water can be largely accounted for on the basis of the reduced G.F.R.

3. Intraperitoneal injections of mammalian preparations of vasopressin, oxytocin and vasopressin/oxytocin into freshwater trout significantly increased the G.F.R.

4. The intraperitoneal injection of aldosterone into freshwater fish had no detectable effect on G.F.R.

5. The similar administration of corticosterone significantly reduced the G.F.R. to 73% of the intact freshwater control value.

Note:

This work was supported by grants to one of us (W. N. H.) from the National Research Council of Canada and the U.S. Atomic Energy Commission (Contract no. AT (45-1) 1381).

This article has been cited by other articles:

				K. R. Olson and T. M. Hoagland Effects of freshwater and saltwater adaptation and dietary salt on fluid compartments, blood pressure, and venous capacitance in trout Am J Physiol Regulatory Integrative Comp Physiol, March 1, 2008; 294(3): R1061 - R1067. [Abstract] [Full Text] [PDF]