Summary
The brackish-water clamRangia cuneata maintains the body fluids hyperosmotic to diluted sea-water of osmolalities less than 200–300 mOsm (Fig. 1). Analyses of pericardial fluid pH, protein concentration and chloride concentration (Table 2, Figs. 3, 2) negate the participation of a Gibbs-Donnan effect in the establishment of the hyperosmolality. The protein concentration of the body fluids decreases with decreasing water osmolality from a mean of 1.3 mg/ml at 416 mOsm to a mean 0.3 mg/ml at 27 mOsm.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Allen, K.: The effect of salinity on the amino acid concentration inRangia cuneata (Pelecypoda). Biol. Bull.121, 419–424 (1961)
Anderson, J. W.: The uptake and incorporation of glycine by the gills ofRangia cuneata (Mollusca; Bivalvia) in response to variations in salinity and sodium. In: Physiological ecology of estuarine organisms (Vernberg, F. J., ed.), pp. 239–258. Columbia, South Carolina: University of South Carolina Press 1975
Bedford, J.J.: Osmotic relationships in freshwater mussel,Hyridella menziesi Gray (Lamellibranchia: Unionidae). Arch. int. Physiol. Biochem.81, 819–831 (1973)
Bedford, W.B., Anderson, J. W.: The physiological response of the estuarine clamRangia cuneata (Gray) to salinity I. Osmoregulation. Physiol. Zool.45, 255–260 (1972)
Bull, H.B.: An introduction to physical biochemistry, 2nd ed. Philadelphia: F.A. Davis Company 1971
Caine, T.D.: The combined effects of temperature and salinity on embryos and larvae of the clamRangia cuneata. Mar. Biol.21, 1–6 (1973)
Chaisemartin, C.: Place de la fonction rénale dans la régulation de l'eau et des sels chezMargaritana margaritifera (Unionidés). C.R. Soc. Biol. (Paris)162, 1193–1195 (1968)
Chaisemartin, C., Martin, P.N., Bernard, M.: Homéoionemie chezMargaritana margaritifera L. (Unionidés), étudiée à l'aide des radioéléments24Na et36Cl. C.R. Soc. Biol. (Paris)162, 523–526 (1968)
Clarke, M.E.: A survey of the effect of osmotic dilution on free amino acids of various polychaetes. Biol. Bull.134, 252–260 (1968)
Dall, W.: The rôle of ninhydrin-positive substances in osmoregulation in the western rock lobster,Panulirus longipes (Milne Edwards). J. exp. mar. Biol. Ecol.19, 43–58 (1975)
Fyhn, H.J.: Holeuryhalinity and its mechanisms in a cirriped crustacean,Balanus improvisus. Comp. Biochem. Physiol.53A, 19–30 (1976)
Fyhn, H.J., Costlow, J.D.: Anaerobic sampling of body fluids in bivalve molluscs. Comp. Biochem. Physiol.52A, 265–268 (1975)
Gerard, J.F., Gilles, R.: The free amino acid pool inCallinectes sapidus (Rathbun) tissues and its rôle in the osmotic intracellular regulation. J. exp. mar. Biol. Ecol.10, 125–136 (1972)
Gilles, R.: Mechanisms of ion and osmoregulation. In: Marine ecology, (Kinne, O., ed.), Vol. 2, Part 1, pp. 259–347. London-New York: Wiley Interscience 1974
Hopkins, S.H., Andrews, J.D.:Rangia cuneata on the East Coast: thousand mile range extension, or resurgence? Science167, 868–869 (1970)
Krogh, A.: Osmotic regulation in aquatic animals. Cambridge: University Press 1939
Lowry, O.H.: Rosebrough, N.J., Farr, A.L., Randall, R.J.: Protein measurements with the Folin phenol reagent. J. biol. Chem.193, 265–275 (1951)
Maurer, D., Watling, L., Aprill, G.: The distribution and ecology of common marine and estuarine pelecypods in the Delaware Bay area. Nautilus88, 38–45 (1974)
Moore, S., Stein, W.H.: Photometric ninhydrin method for use in the chromatography of amino acids. J. biol. Chem.176, 367–388 (1948)
Overbeek, J.T.G.: The Donnan equilibrium. Progr. Biophys.6, 57–84 (1956)
Pierce, S.K.: The water balance ofModiolus (Mollusca: Bivalvia: Mytilidae): osmotic concentrations in changing salinities. Comp. Biochem. Physiol.36, 521–533 (1970)
Potts, W.T.W.: The inorganic composition of the blood ofMytilus edulis andAnodonta cygnea. J. exp. Biol.31, 376–385 (1954)
Potts, W.T.W., Parry, G.: Osmotic and ionic regulation in animals. Oxford-London-New York-Paris: Pergamon Press 1963
Remmert, H.: Über Poikilosmotie und Isoosmotie. Z. vergl. Physiol.65, 424–427 (1969)
Robertson, J.D.: Ionic regulation in some marine invertebrates. J. exp. Biol.26, 182–200 (1949)
Robertson, J.D.: Further studies on ionic regulation in marine invertebrates. J. exp. Biol.30, 277–296 (1953)
Robertson, J.D.: Osmotic and ionic regulation. In: Physiology of mollusca, Vol. 1. (eds. K.M., Wilbur, C.M., Younge), pp. 283–311. New York-London: Academic Press 1964
Rutter, W.J.: Protein determination in embryos. In: Methods in developmental biology (eds. F.H. Wilt, N.K. Wessels), pp. 671–684. New York: Thomas Y. Crowell Company 1967
Schoffeniels, E., Gilles, R.: Ionoregulation and osmoregulation in Mollusca. In: Chemical zoology, Vol. 7 (eds. M. Florkin, B.T. Scheer), pp. 393–420. New York-London: Academic Press 1972
Tenore, K.R.: Macrobenthos of the Pamlico River estuary, North Carolina. Ecol. Monogr.42, 51–69 (1972)
Thomas, C.D.: Reproduction and recruitment of the brackish water clamRangia cuneata in the James River, Virginia. U.S. natl. mar. fish. serv. Fish. Bull.73, 412–430 (1975)
Wolfe, D.A., Petteway, E.N.: Growth ofRangia cuneata Gray. Chesapeake Sci.9, 99–102 (1968)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Fyhn, H.J. A note on the hyperosmotic regulation in the brackish-water clamRangia cuneata . J Comp Physiol B 107, 159–167 (1976). https://doi.org/10.1007/BF00691222
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00691222