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Information × Registration Number 0224U002791, 0123U101366 , R & D reports Title Development of technology to minimize environmental risks in conditions of climatic and war-induced water shortages to ensure food and biological security of Ukraine. Chapter 2. Development of technology for minimizing environmental risks that arise in estuarine hydroecosystems with a shortage of fresh water. popup.stage_title Head Kvach Yurii V., Доктор біологічних наук Registration Date 01-03-2024 Organization Institute of Marine Biology, National Academy of Sciences of Ukraine popup.description2  The 1st stage results of the project "Development of technology for minimizing ecological risks that arise in estuarine hydroecosystems during water shortages (climatic and war-caused), which impact on food and biological security of Ukraine" (2023–2024), II program-target and competitive project of the NAS of Ukraine. As a result of the 1st-year stage implementation, the study of the Dniester and Danube delta fauna was provided to discover alien species. Also, previous years samples were analysed. The invasive fish species composition in the Dniester and Danube deltas was determined, and their infestation by parasites was analysed. The alive invasive species were sampled for laboratory experiments. The methodology for determining the toxic resistance of invasive hydrobionts to priority toxicants and their tolerance to salinity as a leading factor in estuarine hydroecosystems is described. Based on macrozoobenthos samples, the main alien invasive species of the Dniester and Danube delta areas were determined. In total of 27 fish species were found in the Danube delta, 6 of which (22.2%) were alien. In the Dniester delta we found only 14 fish species, three of which (21.4%) were alien. Thus, the percentage of alien species was almost identical. The experimental studies showed the maximum survival of Potamopyrgus antipodarum in the water salinity range of 0-20‰, the absolutely lethal was 30 ‰. In the 2021–2023, 15 alien macroinvertebrates species were found in the Danube Delta (low reach and transitional waters). Based on the received data analysis, according to Descriptor 2 of the EU Framework Directive on marine strategy (alien species) the main indicators for the target hydroecosystems were established. Product Description popup.authors Bondarenko Olena S. Koshelev Oleksandr V. popup.nrat_date 2024-03-01 Close