The Pattern of Carbon Dioxide Excretion in the Rainbow Trout Salmo Gairdneri
Open Access
- 1 February 1978
- journal article
- research article
- Published by The Company of Biologists in Journal Of Experimental Biology
- Vol. 72 (1), 17-24
- https://doi.org/10.1242/jeb.72.1.17
Abstract
Patterns of carbon dioxide excretion were investigated in rainbow trout (Salmo gairdneri). 2. The loss of erythrocytic carbonic anhydrase caused by severe anaemia does not affect acid/base regulation or the ability of fish to excrete CO2. 3. Bicarbonate excretion across the saline-perfused gills of trout is significant even though residence time for the saline in the gills is only 1--3 s. CO2 excretion across these saline-perfused gills is blocked by the carbonic anhydrase inhibitor, diamox. 4. The excretion of CO2 in fish is via the movement of plasma bicarbonate into the gill epithelium where branchial carbonic anhydrase catalyses the production of CO2. Fish can adjust pH by regulating bicarbonate movement across the gills. 5. The erythrocytic carbonic anhydrase is not necessary for CO2 excretion in the gills but is involved in facilitating Bohr and Root shifts to augment O2 delivery in the tissues.This publication has 14 references indexed in Scilit:
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