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Acutely elevated vasopressin increases circulating concentrations of cortisol and aldosterone in fasting northern elephant seal (Mirounga angustirostris) pups

Rudy M. Ortiz1,2,*, Charles E. Wade2, C. Leo Ortiz1 and Frank Talamantes1

1 Department of Biology, University of California, Santa Cruz, 95064, USA
2 Neuroendocrinology Laboratory, Division of Life Science, NASA Ames Research Center, Moffett Field, CA 94035, USA



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  		Fig. 1. Plasma vasopressin (VP) levels during control and post-infusion sampling periods. Values are means ± S.E.M. (N=7). Insert: total VP excreted over a 24 h period in controls and post-infusion. *Significantly different (P<0.05) from control value.

 


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  		Fig. 2. (A) Plasma aldosterone (Al) and (B) cortisol concentrations, and (C) plasma renin activity (PRA), in response to the infusion of VP. See Materials and methods for details. Values are means ± S.E.M. (N=7). *Significantly different (P<0.05) from control; {dagger}significantly different (P<0.05) from Pre.

 


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  		Fig. 3. Urine output, osmotic clearance (Cosm) and free water clearance (CH2O) over a 24 h period in control and post-infused pups. See Materials and methods for details. Values are means ± S.E.M. (N=7). *Significantly different (P<0.05) from control values.

 


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  		Fig. 4. Excreted electrolytes over a 24 h period in control and post-infused pups. Values are means ± S.E.M. (N=7). *Significantly different (P<0.05) from control value.

 




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