The role of the gills in seawater adaptation inAnguilla dieffenbachii
- 17 Downloads
Throughout the period of adaptation to sea water the net flux of potassium in the isolated gills remains constant. Initially on transfer to sea water a small net influx of sodium and chloride ions is recorded in the isolated gills. Within a short period of time a net outflux of sodium and chloride is recorded which progressively increases, reaching a maximum after approximately 100 hours of adaptation (Fig. 1).
Despite unfavourable osmotic and ionic gradients the functioning of the isolated gill is such that the concentration of the fluid passing through it is actually reduced after some 10–15 hours of seawater adaptation (Fig. 2).
KeywordsSodium Chloride Potassium Ionic Gradient Seawater Adaptation
Unable to display preview. Download preview PDF.
- Bellamy, D.: Movements of potassium, sodium and chloride in incubated gills from the silver eel. Comp. Biochem. Physiol.3, 125–135 (1961)Google Scholar
- Evans, D.: Sodium, chloride and water balance of the intertidal teleostXiphister atropurpureits. III. Roles of simple diffusion, exchange diffusion, osmosis and active transfer. J. exp. Biol.47, 525–534 (1967)Google Scholar
- Evans, D.: Sodium, chloride and water balance of the intertidal teleost (Pholis gunellus). J. exp. Biol.50, 179–190 (1969)Google Scholar
- Hickman, C. P., Jr.: Ingestion, intestinal absorption, and elimination of seawater and salts in the southern flounder,Paralychthys lethostigma. Canad. J. Zool.46, 457–466 (1968)Google Scholar
- Kamiya, M.: Changes in ion and water transport in isolated gills of the cultured eel during the course of adaptation. Annot. zool. jap.40, 123–129 (1967)Google Scholar
- Keys, A.: The mechanism of adaptation to varying salinity in the common eel and the general problem of osmotic regulation in fishes. Proc. roy. Soc. B112, 180–199 (1933)Google Scholar
- Keys, A. B.: Chloride and water secretion and absorption by the gills of the eel. Z. vergl. Physiol.15, 364–388 (1931)Google Scholar
- Krogh, A.: Osmotic regulation in aquatic annuals. London: Cambridge University Press 1939Google Scholar
- Maetz, J.: Fish gills: mechanisms of salt transfer in fresh water and sea water. Phil. Trans. B262, 209–249 (1971)Google Scholar
- Maetz, J., Skadhauge, E.: Drinking rates and gill ionic turnover in relation to external salinities in the eel. Nature (Lond.)217, 371–373 (1968)Google Scholar
- Potts, W. T. W., Foster, M. A., Stather, J. W.: Salt and water balance in salmon smolts. J. exp. Biol.52, 553–564 (1970)Google Scholar
- Shuttleworth, T. J.: A new isolated perfused gill preparation for the study of the mechanisms of ionic regulation in teleosts. Comp. Biochem. Physiol.43A, 59–64 (1972)Google Scholar
- Shuttleworth, T. J., Freeman, R. F. H.: The role of the gills in seawater adaptation inAnguilla dieffenbachii. I. Osmotic and ionic composition of the blood and gill tissue. J. comp. Physiol.86, 293–313 (1973)Google Scholar
- Utida, S., Oide, M., Saishu, S., Kamiya, M.: Pré-établissement du mécanisme d'adaptation à l'eau de mer dans l'intestin et les branchies isolées de l'anguille argentée au cours de sa migration catadrome. C. B. Soc. Biol. (Paris)161, 1201–1204 (1967)Google Scholar