Toxicological biotesting of waters of surface sources of water service and drinking water using larvas of Хenopus laevis

Abstract

The purpose. Heightening selfdescriptiveness of the method of biotesting of waters of surface sources of water service and drinking water due to use of larvas of Xenopus laevis. Methods. Testing on response of fixation of 3-week larvas (tadpoles) of Rana ridibunda Pallas and Xenopus laevis Daudin with 8-day exposure of larvas. Results. During biotesting the low level of chronic toxicity of waters under test was fixed on tadpoles of R. ridibunda (25 – 50%), low level of acute lethal toxicity (25 – 50%) and average level of chronic toxicity (50 – 75%) — on tadpoles X. laevis. Conclusions. The probes confirm an opportunity of heightening selfdescriptiveness of the method of biotesting of waters of sources of water service and drinking water with the use of larvas of Xenopus laevis, which have appeared in conditions CE «Zhytomyrvodokanal» more sensitive to rather low levels of pollution (on the average for 28,60% in acute experience at duration of 4 day, and for 28,86% in short-term chronic experience at duration of 8 day) in comparison with larvas of Rana ridibunda.