spacer gif spacer gif spacer gif spacer gif Online submission spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Tang, Y.
Right arrow Articles by Boutilier, R. G.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Tang, Y.
Right arrow Articles by Boutilier, R. G.

Journal of Experimental Biology, Vol 134, Issue 1 297-312, Copyright © 1988 by Company of Biologists

JOURNAL ARTICLES

Acid-base regulation following acute acidosis in seawater-adapted rainbow trout, Salmo gairdneri: a possible role for catecholamines

Y Tang, S Nolan and RG Boutilier
Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada.

A fall in blood pH was induced by intra-arterial infusion of HCl in seawater-adapted rainbow trout (Salmo gairdneri). The acute acidosis resulting from HCl infusion caused a short-lived decrease in plasma bicarbonate concentration ([HCO3-]) and an increase in arterial CO2 tension (PaCO2). Erythrocyte pH and bicarbonate concentrations were not significantly altered by the infusion of acid. Injection of acid did, however, stimulate a branchial net H+ efflux which could be primarily accounted for by a net uptake of bicarbonate equivalent ions from the environmental water. Acid infusion of animals pre-treated with the beta-adrenergic blocking agent, propranolol, induced a similar pattern of change in plasma acid-base status. However, the recovery of plasma pH and restoration of plasma [HCO3-] were slower than in animals infused with acid alone. Red cell pH fell significantly in the face of plasma acidosis in the beta-blocked animals. Erythrocyte [HCO3-] showed a similar pattern of change to that of erythrocyte pH. Branchial net H+ efflux increased to a lesser extent following acid infusion in animals treated with propranolol. We conclude that catecholamines released into the bloodstream during periods of acute acidosis may play an important role in facilitating branchial H+ efflux in seawater-adapted rainbow trout.


This article has been cited by other articles:


Home page
 J. Exp. Biol.Home page
L. M. Hanson, S. Obradovich, J. Mouniargi, and A. P. Farrell
The role of adrenergic stimulation in maintaining maximum cardiac performance in rainbow trout (Oncorhynchus mykiss) during hypoxia, hyperkalemia and acidosis at 10{degrees}C
J. Exp. Biol., July 1, 2006; 209(13): 2442 - 2451.
[Abstract] [Full Text] [PDF]

Home page
 Physiol. Rev.Home page
D. H. Evans, P. M. Piermarini, and K. P. Choe
The Multifunctional Fish Gill: Dominant Site of Gas Exchange, Osmoregulation, Acid-Base Regulation, and Excretion of Nitrogenous Waste
Physiol Rev, January 1, 2005; 85(1): 97 - 177.
[Abstract] [Full Text] [PDF]

Home page
 J. Exp. Biol.Home page
A Salama, I. Morgan, and C. Wood
The linkage between Na+ uptake and ammonia excretion in rainbow trout: kinetic analysis, the effects of (NH4)2SO4 and NH4HCO3 infusion and the influence of gill boundary layer pH
J. Exp. Biol., January 3, 1999; 202(6): 697 - 709.
[Abstract] [PDF]


© The Company of Biologists Ltd 1988