5. Summary
Like all other polychaetes,M. gravelyi also swells when exposed to hyposmotic media. But the extent of increase was considerably low. In this worm, as in other polychaetes, the initial increase and the final volume attained are a function of the external medium. Both the final volume and the initial increase being very low inM. gravelyi, reduction in permeability is, perhaps, the maximum.
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6. References
Beadle, L. C... “The effect of salinity changes on the water content and respiration of marine invertebrates,”J. exp. Biol., 1931,8, 211–27.
Beadle, L. C... “Adaptation to changes of salinity in the polychaetes: I. Control of body volume and of body fluid concentration inNereis diversicolor,”J. exp. Biol., 1937,14, 56–70.
Ellis, W. G... “The water and electrolyte exchange ofNereis diversicolor (Muller),” Ibid., 1937,14, 340–50.
—————.. “Comparative measurements of water and electrolyte exchange in a stenohaline and in a euryhaline polychaete,” Ibid., 1939,16, 483–86.
Jørgensen, C. B. and Dales, R. P. “The regulation of volume and osmotic regulation in some nereid polychaetes,”Physiol. comp., 1957,4, 357–74.
Krishnamoorthi, B... “Salinity tolerance and volume regulation in four species of polychaetes,”Proc. Ind. Acad. Sci., 1962,56, 363–71.
—————.. “Volume regulation in eggs, larvae and adults of a brackish water polychaete,Diopatra variabilis (Southern),” Ibid., 1963b,57, 275–89.
—— and Krishnaswamy, S... “Physiological studies onMarphysa gravelyi Southern: I. Salinity Tolerance,” Ibid., 1966a,63, 26–34.
Lowndes, A. G... “The displacement method of weighing aquatic animals,”J. mar. biol. Ass. U.K., 1942,25, 555–72.
Sayles, L. P... “The effects of salinity changes on body weight and survival ofNereis virens,”Biol. Bull., Woods Hole, 1936,69, 233–44.
Schlieper, C... “Uber die Einwirkung niederer Salzkonzentration auf marine Organismen,”Z. vergl. Physiol, 1929a,9, 478–514.
—————.. “Neue Versuche uber die Osmoregulation wasserlebender Tiere,”Sitzungsbericht d. Ges. Z. Beford. d. gesamt. Naturwiss. Marburg, 1929b,64, 143–56.
Smith, R. I... “Salinity variation in interstitial water of sand at Kames Bay, Millport, with reference to the distribution ofNereis diversicolor,”J. mar. biol. Ass. U.K., 1955c,34, 33–46.
—————.. “The ecology of the Tamar Estuary. VII. Observations on the interstitial salinity of intertidal muds in the estuarine habitat ofNereis diversicolor,” Ibid., 1956,31, 81–104.
----- .. “Physiological and Ecological problems of brackish waters in Marine Biology,”Proceedings of the Twentieth Annual Biology Colloquium, Oregon State College,, April 1959, pp. 59–69.
—————.. “A comparison of salt loss rate in three species of brackish water Nereid polychaetes,”Biol. Bull., Woods Hole, 1963b 125, 332–43.
Topping, F. L. and Fuller, J. F. “The accommodation of some marine invertebrates to reduced osmotic pressures,” Ibid., 1942,82, 372–84.
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Formed part of a thesis accepted for the award of the Ph.D. degree of the University of Madras.
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Krishnamoorthi, B., Krishnaswamy, S. Physiological studies onMarphysa gravelyi Southern. Proc. Indian Acad. Sci. 63, 117–125 (1966). https://doi.org/10.1007/BF03051983
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DOI: https://doi.org/10.1007/BF03051983