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Journal of comparative physiology

, Volume 86, Issue 4, pp 323–330 | Cite as

The role of the gills in seawater adaptation inAnguilla dieffenbachii

III. The relative significance of the gills
  • T. J. Shuttleworth
  • R. F. H. Freeman
Article

Summary

A comparison of results obtained in studies of serum concentrations in the whole fish with those obtained from preparations of isolated, perfused gills indicates that the rate at which ions are entering the gills of freshwaterAnguilla dieffenbachii on being placed in sea water may only amount to some 10% or less of the calculated rate of addition of ions to the fish as a whole. An additional major route for the entry of ions into the fish on being placed in sea water, other than via the gills, is therefore indicated and, from a consideration of the functioning of the main effector organs of ionic regulation in teleosts, it is concluded that the intestine is the major site of the initial addition of ions to the fish on transfer to sea water.

The subsequent reduction and eventual stabilisation of serum ionic concentrations following transfer can be largely explained on both a qualitative and temporal basis by the changes in functioning of the gills, as demonstrated by the isolated, perfused preparations.

Keywords

Serum Concentration Ionic Concentration Major Site Subsequent Reduction Temporal Basis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Foster, M. A.: Ionic and osmotic regulation in three species ofCottus (Cottidae Teleost.). Comp. Biochem. Physiol.30, 751–759 (1969)Google Scholar
  2. Gaitskell, R. E., Chester Jones, I.: Drinking and urine production in the European eel (Anguilla anguilla L.). Gen. comp. Endocr.16, 478–483 (1971)Google Scholar
  3. Hickman, C. P., Jr.: Ingestion, intestinal absorption, and elimination of seawater and salts in the southern flounder,Paralichthys lethostigma. Canad. J. Zool.46, 457–466 (1968).Google Scholar
  4. Holmes, W. N., Donaldson, B. M.: The body compartments and the distribution of electrolytes. In: Fish Physiology, vol. 1, p. 1–89, W. S. Hoar, D. J. Randall, eds. New York: Academic Press 1969.Google Scholar
  5. Kirsch, R.: The kinetics of peripheral exchanges of water and electrolytes in the silver eel (Anguilla anguilla L.) in fresh water and in sea water. J. exp. Biol.57, 489–512 (1972).Google Scholar
  6. Maetz, J.: Mechanisms of salt and water transfer across membranes in teleosts in relation to the aquatic environment. Mem. Soc. Endocr.18, 3–29 (1970)Google Scholar
  7. Maetz, J.: Fish gills: mechanisms of salt transfer in fresh water and sea water. Phil. Trans. B262, 209–249 (1971)Google Scholar
  8. 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
  9. Oide, M.: Effects of inhibitors on transport of water and ions in isolated intestine and Na+-K+ ATPase in intestinal mucosa of the eel. Annot. zool. jap.40, 130–135 (1967).Google Scholar
  10. Oide, M., Utida, S.: Changes in water and ion transport in isolated intestines of the eel during salt adaptation and migration. Mar. Biol.1, 102–106 (1967)Google Scholar
  11. Potts, W. T. W., Evans, D. H.: Sodium and chloride balance in the killifishFundulus heteroclitus. Biol. Bull. mar. biol. Lab., Woods Hole133, 411–425 (1967).Google Scholar
  12. Potts, W. T. W., Fleming, W. B.: The effects of prolactin and divalent ions on the permeability to water ofFundules kansae. J. exp. Biol.53, 317–327 (1970)Google Scholar
  13. Potts, W. T. W., Foster, M. A., Budy, P. P., Parry Howells, G.: Sodium and water balance in the cichlid teleostTilapia mossambica. J. exp. Biol.47, 461–470 (1967)Google Scholar
  14. 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
  15. 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 (1973a)Google Scholar
  16. Shuttleworth, T. J., Freeman, R. F. H.: The role of the gills in seawater adaptation inAnguilla dieffenbachii. II. Net ion fluxes in isolated perfused gills. J. comp. Physiol.86, 315–321 (1973b)Google Scholar
  17. Skadhauge, E.: The mechanism of salt and water absorption in the intestine of the eel (Anguilla anguilla) adapted to waters of various salinities. J. Physiol. (Lond.)204, 127–134 (1969)Google Scholar
  18. Smith, H. W.: The absorption and excretion of water and salts by marine teleosts. Amer. J. Physiol.93, 480–505 (1930).Google Scholar
  19. Utida, S., Isono, N., Hirano, T.: Water movement in isolated intestine of the eel adapted to freshwater or seawater. Zool. Mag. (Tokyo)76, 203–204 (1967).Google Scholar

Copyright information

© Springer-Verlag 1973

Authors and Affiliations

  • T. J. Shuttleworth
    • 1
  • R. F. H. Freeman
    • 1
  1. 1.Department of ZoologyUniversity of OtagoDunedinNew Zealand

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