Abstract
The ability of healthy individuals ofPontoscolex corethrurus to survive and maintain its weight in tap water and different concentrations of NaCl and sucrose solution is studied. In water, earthworms survived normally but died at 48 hr exposure in 5% sugar and 0.4% NaCl. In water, an increase of 26% in total body weight was observed at 4 hr exposure. Weight also increased when exposed to 1, 2, 3 and 4% sugar solution, but it decreased in 5% sugar solution. This decrease in weight may be due to osmotic crisis. Similar weight changes have also been observed in NaCl solutions. An increase in weight was observed up to 0.3% NaCl and a decrease in weight in 0.4% NaCl and above.
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References
Arunachalam S 1978 Some aspects of the bioiogy of a tropical earthwormPontoscolex corethrurus (O. F. Muller);J. Bombay Nat. Hist. Soc. 75 110–114
Arunachalam S, Baskaran P and Krishnamoorthy G 1982 Biometrical studies onPontoscolex corethrurus; Anim. Morphol. Physiol. (communicated).
Bahl K N 1945 Studies on the structure and physiology of the Nephridia Oligochaeta Part VI: The Physiology of excretion and the significance of the enteronephric type of nephridial system;Q. J. Micr. Sci. 85 343–389.
Dietz TH and Alvarado RH 1970 Osmotic and Ionic regulation inLumhricus terrestris L;Biol. Bull 138 247–261.
Edwards CA and Lofty J R 1977 Biology of earthworms, 2edn (New York: John Wiley) p. 333
Ganapathi P N and Subba Rao B V S S R 1972 Salinity tolerance of a littoral oligochaete,Pontodrilus bermudensis, Beddards;Proc. Indian Natl. Sci. Acad. B38 350–354
Hanumante M M and Nagabhushanam R 1977 Some aspects of osmotic behaviour of the Tropical earthwormPerionyx excavatus;J. Anim. Morphol. Physiol. 24 3–12
Kale R D and Krishnamoorthy RV 1981 What effects the abundance and diversity of earthworms in Soil;Proc. Indian Acad. Sci. (Anim. Sci.) 90 117–121
Oglesby L C 1970 Studies on the salt water balance ofNereis diversicolor. I. Steady state parametersComp. Biochem. Physiol. 36 446–466
Wolf A V 1940 Paths of water exchange in the earthworm;Physiol. Ecol. 13 294–308
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Arunachalam, S., Krishnamoorthy, G. & Baskaran, P. Weight changes and survival of a tropical earthwormPontoscolex corethrurus . Proc Ani Sci 92, 193–198 (1983). https://doi.org/10.1007/BF03186186
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DOI: https://doi.org/10.1007/BF03186186