ВЛИЯНИЕ НЕКОТОРЫХ ЗАГРЯЗНЯЮЩИХ ВЕЩЕСТВ НА НЕКТОБЕНТИЧЕСКИХ РАКООБРАЗНЫХ

Abstract

Background. Ingress of pollutants in water bodies, both direct and from the catchment area, is constantly increasing. It creates an escalating threat to aquatic ecosystems and humans as consumers of water and aquatic biological resources, which contributes to the relevance of the monitoring and regulation of water pollution. This work is aimed at the evaluation of the effect of various toxic substances and pollutants on the survival of the amphipod Hyalella azteca in a chronic experiment. Methods. This study has been carried out according to the standard toxicological methods. Results. This paper presents the data on the influence of pollutants of various nature (sodium hydrogen phosphate, sodium sulfate, zinc complex of 2-Phosphono-1,2,4-butanetricarboxylic acid, dimethyl sulfide) on the Hyalella azteca Saussure, 1858 crustaceans. Hyalella azteca have found a wide application in biotesting; however, these crustaceans are not used in the system of fisheries regulation in Russia. The maximum allowable and threshold concentrations of the investigated substances in the aquatic environment have been established for Hyalella azteca using the experimental approach. The maximum allowable concentration (MAC) of sodium hydrogen phosphate in the phosphorus equivalent was 1.0 mg/L, its threshold concentration was 2.5 mg/L; the MAC of sodium sulfate in the sulfate anion equivalent was 750 mg/L, its threshold concentration was more than 750 mg/L; the MAC of the zinc complex of 2-Phosphono-1, 2,4-butanetricarboxylic acid was 10 mg/L, its threshold concentration was 100 mg/L; the MAC of dimethyl sulfide was 10 mg/L, its threshold concentration was 20 mg/L. Conclusion. The amphipods H. azteca are moderately sensitive to pollutants. Among all investigated substances, the most toxic for H. azteca was sodium hydrogen phosphate.