Abstract
The proposed technique of water quality assessment is intended for monitoring and measuring the behavioral responses of fishes in minimally structured environment, and further evaluating the reactivity of the fish nervous system. Tests were conducted in the period from 11 May to 7 June, 2016 at the sea coast station of the Southern Scientific Center of the Russian Academy of Sciences (Kagalnik village, the Rostov region). As test-objects (bioindicators), there were selected three species of gobies: round goby ( Neogobius melanostomus ), monkey goby ( Neogobius fluviatilis ) and goby Shearman ( Neogobius syrman ). Fish behavior was assessed by response to external stimuli, which is manifested by increased or decreased locomotor activity. Expected and phone activity has been defined. As the test stimuli there were used: a low-frequency sonic boom, a sinusoidal audio signal, a high-frequency sonic boom, an electrical stimulus. Testing water samples were taken from three stations in the water area of the Gulf of Taganrog (estuary of the Don, middle section of the bay and section of the river close to the coastal base). The results showed that the developed method is sensitive to changes of natural water pollutants and can be used in the monitoring system, as a component for coastal stations on the test areas of the Azov Sea in terms of bioindication data matching techniques to identify natural and anthropogenic sources of pollution.
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