1982•Journal of Experimental ZoologyRequires access

Ammonia excretion by the gills of two marine teleost fish: The importance of NH4+ permeance

Léon Goldstein, James B. Claiborne, David E. Evans

Abstract

Abstract Varying the concentration of un‐ionized ammonia (NH3) in the medium perfusing the gills of the isolated fish head while holding the total ammonia (NH4+ + NH3) concentration constant had no significant effect on gill ammonia excretion. In contrast, alteration in the medium NH4+ concentration at a fixed NH3 concentration produced a significant change in ammonia excretion. Thus, gill ammonia excretion was related to medium NH4+, not NH3, concentration.

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Key concepts: Excretion, Gill, Ammonia, Chemistry, Fish <Actinopterygii>, Nuclear chemistry, Biochemistry, Biology