QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by CAMERON, J. N. Articles by POLHEMUS, J. A. Search for Related Content PubMed Articles by CAMERON, J. N. Articles by POLHEMUS, J. A.

Journal of Experimental Biology 60,183-194 (1974)
Published by Company of Biologists 1974

Theory of CO₂ Exchange in Trout Gills

JAMES N. CAMERON ¹ and JOHN A. POLHEMUS ²

¹ Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska 99701
² Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska 99701; 351 So. Edgewood Ave., LaGrange, Illinois, U.S.A.

1. A computer simulation of countercurrent CO₂ exchange in fish gills was constructed to examine effects of variations in blood and water flow rates.

2. CO₂ output was sensitive to both blood and water flow rates, contrary to experimental data.

3. Various explanations of the contradiction are discussed, including patterns of gill perfusion and possible shunting of blood.

4. A simplified version of the model was also used to demonstrate extreme sensitivity of CO₂ efflux to variations of the residence time of blood in the gills.

5. Data from the literature on reaction rate constants for the CO₂/carbonate/ bicarbonate system are summarized, and the importance of some of these reactions is examined.

Note:

Supported in part by National Science Foundation Grant GB-31782 to J.N.C. and by funds from the Institute of Arctic Biology.

This article has been cited by other articles:

				A. J. Esbaugh, S. F. Perry, M. Bayaa, T. Georgalis, J. Nickerson, B. L. Tufts, and K. M. Gilmour Cytoplasmic carbonic anhydrase isozymes in rainbow trout Oncorhynchus mykiss: comparative physiology and molecular evolution J. Exp. Biol., May 15, 2005; 208(10): 1951 - 1961. [Abstract] [Full Text] [PDF]

				K. M. Gilmour and S. F. Perry Branchial membrane-associated carbonic anhydrase activity maintains CO2 excretion in severely anemic dogfish Am J Physiol Regulatory Integrative Comp Physiol, June 1, 2004; 286(6): R1138 - R1148. [Abstract] [Full Text] [PDF]

				P. R. Desforges, S. S. Harman, K. M. Gilmour, and S. F. Perry Sensitivity of CO2 excretion to blood flow changes in trout is determined by carbonic anhydrase availability Am J Physiol Regulatory Integrative Comp Physiol, February 1, 2002; 282(2): R501 - R508. [Abstract] [Full Text] [PDF]