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J Appl Physiol 17: 275-282, 1962;
8750-7587/62 $5.00
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Gas composition of pressurized, perfused gas pockets and the fish swim bladder

J. Piiper 1, H. T. Humphrey 1, and H. Rahn 1

1 Department of Physiology, University of Buffalo School of Medicine, Buffalo, New York

The behavior of the composition of pressurized, perfused gas pockets is analyzed in theory and experimentally, with the aim of contributing to the understanding of the effect of differential absorption on the composition of the fish swim bladder gas. The equations describing the change in the composition of pressurized, perfused gas pockets are derived and experimentally verified. If a gas pocket initially containing room air is subjected to elevated pressure and perfused with water equilibrated with room air, the concentration of the less soluble gas nitrogen increases during the absorption process. High partial pressures of nitrogen and argon found in swim bladders of fish living at great depths can be qualitatively explained on the basis of accumulation of these gases by preferential absorption of oxygen and carbon dioxide, in connection with certain assumptions on the mode of secretion of the gases

Submitted on October 9, 1961




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