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Water balance systems of Rangia cuneata: ionic and amino acid regulation in changing salinities

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Abstract

In order to study the interaction of the extracellular and intracellular osmoregulatory systems of the bivalve Rangia cuneata, we have measured blood osmotic and ionic concentrations together with intracellular free amino acid concentrations and total tissue water under identical salinity conditions. Like freshwater bivalves, the blood of R. cuneata is maintained hyperosmotic (50 mOsm) to the environment in salinities below 110 mosm by the regulation of Na+, Cl-, K+ and Ca2+ concentrations. On the other hand in company with marine bivalves, R. cuneata also regulates intracellular free amino acids (FAA) as a mechanism to control cellular volume during osmotic stress over the entire non-lethal salinity range (3 to 620 mOsm). Alanine is the predominant intracellular osmotic effector. Thus, by utilizing the osmoregulatory mechanisms of both marine and freshwater bivalves, R. cuneata is able to tolerate salinities ranging from freshwater to 25 ppt and to traverse the faunal salinity boundary, known as the horohalinicum (5 to 8 ppt), controlling cell volume throughout.

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Literature Cited

  • Allen, K.: The effect of salinity on the amino acid and concentration in Rangia cuneata (Pelecypoda). Biol. Bull. 121, 419–424 (1961)

    Google Scholar 

  • Baginski, R. M. and S. K. Pierce: Anaerobiosis: A possible source of osmotic solute for high-salinity acclimation in marine molluscs. J. exp. Biol. 62, 589–598 (1975)

    Google Scholar 

  • Bedford, W. B. and J. W. Anderson: The physiological response of the estuarine clam Rangia cuneata (Gray) to salinity I: Osmoregulation. Physiol. Zool. 45, 255–260 (1972)

    Google Scholar 

  • Castagna, M. and D. Chanley: Salinity tolerance of some marine bivalves from inshore and estuarine environments in Virginia waters on the western mid-Atlantic Coast. Malacologia. 12(1), 47–96 (1973)

    Google Scholar 

  • Deaton, L. J. and M. J. Greenberg: Ionic regulation in two species of bivalve. Am. Zool. 17, 902 (Abstract) (1977)

    Google Scholar 

  • Dietz, T. H. and W. D. Branton: Ionic regulation in the freshwater mussel Ligumia subrosterata (Say). J. comp. Physiol. 104, 19–26 (1975)

    Google Scholar 

  • Fyhn, H. J. and J. D. Costlow: Anaerobic sampling of body fluids in bivalve molluscs. Comp. Biochem. Physiol. 53A, 19–30 (1975)

    Google Scholar 

  • Fyhn, H. J.: A note on the hyperosmotic regulation in the brackish-water clam Rangia cuneata. J. comp. Physiol. 107, 159–167 (1976)

    Google Scholar 

  • Gainey, L. F. and M. J. Greenberg: Physiological basis of the species abundance-salinity relationship in molluscs: A speculation. Mar. Biol. 40, 41–49 (1977)

    Google Scholar 

  • Khlebovich, V. V.: Aspects of animal evolution related to critical salinity and internal stake. Mar. Biol. 2, 338–45 (1969)

    Google Scholar 

  • Kinne, O.: Salinity. Animals-invertebrates. In: Marine ecology Vol. 1: Environmental factors, part 2, (edited by Kinne, O.). pp. 821–995. London: Wiley-Interscience 1971

    Google Scholar 

  • Otto, J. and S. K. Pierce: An interaction of extra- and intracellular osmoregulatory mechanisms in the bivalve mollusc Rangia cuneata. Mar. Biol. 61, 197–198 (1981)

    Google Scholar 

  • Pierce, S. K., Jr.: The water balance of Modiolus (Mollusca: Bivalvia: Mytilidae): Osmotic concentrations in changing salinities. Comp. Biochem. Physiol. 36, 521–533 (1970)

    Google Scholar 

  • Pierce, S. K., Jr.: Volume regulation and valve movements in marine mussels. Comp. Biochem. Physiol. 39A, 103–117 (1971a)

    Google Scholar 

  • Pierce, S. K., Jr.: A source of solute for volume regulation in marine mussels. Comp. Biochem. Physiol. 38A, 619–635 (1971b)

    Google Scholar 

  • Pierce, S. K., Jr. and M. J. Greenberg: The initiation and control of free amino acid regulation of cell volume in salinity stressed marine bivalves. J. exp. Biol. 59, 435–440 (1973)

    Google Scholar 

  • Potts, W. T. W. and G. Parry: Osmotic and ionic regulation in animals. Pergamon Press, New York 1963

    Google Scholar 

  • Robertson, J. D.: Osmotic and ionic regulation. In: Physiology of mollusca (edited by Wilbur, K. M. and Yonge, C. M.) Vol. 1, pp. 283–311. New York: Academic Press 1964

    Google Scholar 

  • Saintsing, D. G. and D. W. Towle: Na++K+ ATPase in the osmoregulating clam Rangia cuneata. J. exp. Zool. 206, 435–442 (1979)

    Google Scholar 

  • Watts, J. A. and S. K. Pierce: A correlation between the activity of divalent cation activated adenosine triphosphatase in the cell membrane and low salinity tolerance of the ribbed mussel, Modiolus demissus demissus. J. exp. Zool. 204, 49–56 (1978b)

    Google Scholar 

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Authors and Affiliations

  1. Department of Zoology, University of Maryland, 20742, College Park, MD, USA

    J. Otto & S. K. Pierce

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  1. J. Otto
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  2. S. K. Pierce
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Communicated by I. Morris, West Boothbay Harbor

Please address requests for reprints to Dr. S. K. Pierce

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Otto, J., Pierce, S.K. Water balance systems of Rangia cuneata: ionic and amino acid regulation in changing salinities. Mar. Biol. 61, 185–192 (1981). https://doi.org/10.1007/BF00386658

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  • DOI: https://doi.org/10.1007/BF00386658

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