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Some aspects of osmotic biology of the freshwater leech, Poecilobdella viridis (Blanchard)

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Abstract

Ability of the freshwater leech, Poecilobdella viridis to withstand osmotic changes was investigated by following the fluctuations of the body weight in tap-water and in different salt concentrations. The salinity tolerance limit (lethal salt concentration) of this leech was found to be 1.54% NaCl which equilibrates approximately 51.359% sea-water. There was a significant weight loss in P. viridis when kept in both, hypo- and hypertonic media. It is concluded that volume regulation (through weight changes) was slight in hypotonic media whereas in hypertonic media there was an incessant decline in body weight. Adaptive significance of these findings is discussed.

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Authors and Affiliations

  1. Department of Zoology, Marathwada University, 431 004, Aurangabad, India

    G. K. Kulkarni, M. M. Hanumante & R. Nagabhushanam

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  1. G. K. Kulkarni
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  2. M. M. Hanumante
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  3. R. Nagabhushanam
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Kulkarni, G.K., Hanumante, M.M. & Nagabhushanam, R. Some aspects of osmotic biology of the freshwater leech, Poecilobdella viridis (Blanchard). Hydrobiologia 56, 103–108 (1977). https://doi.org/10.1007/BF00023346

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  • DOI: https://doi.org/10.1007/BF00023346

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