Abstract
The response of living organisms to pollution is manifested in physiological, morphological and behavioural changes, which makes biomonitoring a very convenient and predictable method. Daphnia magna, in particular, is the best indicator in the ratio of the time spent and of course the accuracy of the readings. Increasing the information content of biotesting waters of surface sources of water supply and drinking water on mollusks Daphnia magna S. through the use of a test feature of heart rate. The test durations were 48 and 3 hours, respectively. The heart rate measurement results indicate a low level of toxicity (range, 26.2 to 35.4%). The results of the study suggest that the rapid assessment of water quality with the use of Daphnia should rely more on the heart rate measurement. This method proved to be highly effective in estimating the water samples from the Flathet Reservoir, yielding data 73.11% faster than the immobilisation test. The sensitivity level was also 28.33% higher.
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