Evaluation of toxicity of waters from the surface sources of water supply and drinking water of Zhytomyr city by the method of short-term chronic biotesting

Abstract

The goal of the researches is to increase the informativeness of testing water from the surface sources of water supply and drinking water at the expense of the use of african clawed frog. Method of the researches is biotesting with determination of test sign of immobilization the marsh frog (Rana ridibunda Pallas, 1771) and african clawed frog (Xenopus laevis Daudin, 1802) at term 8-day exposition of individuals. During a biotesting for lack of immobilization R. ridibunda it is not discovered toxicity of water, but on the basis of immobilization X. laevis the low level of toxicity of them in within 25–50% is defined. Assessment of chronic toxicity of waters from the surface sources of water supply and drinking water is expedient to conduct, using the biotesting with X. laevis. It is shown the high sensibility of these test-organisms in comparison with R. ridibunda (in average to 28.2% in acute lethal tests with exposition time 4 day and to 41.3% in short-term chronic tests with exposition time 8 day).