http://gp.sea.gov.ua:8082/ipt/resource?r=ukrmonitoring2003 UA_2003_mesozooplankton Mykhailo NABOKIN Ukrainian Scientific Centre of Ecology of the Sea (UkrSCES) Oleksandr Leposhkin Ukrainian Scientific Centre of Ecology of the Sea (UkrSCES) Oleksandr Neprokin o.neprokin@gmail.com user 2026-08-07 eng Data were collected in 2003 within the framework of the Ukrainian national monitoring program. Mesozooplankton samples were obtained using a vertical Juday plankton net with a 0.1 m² mouth opening and a mesh size of 150 μm. Vertical hauls were performed from 2 m above the seabed or from the lower boundary of the oxic layer to the surface, depending on local conditions. The sampling depth was determined by accounting for both the length and the angle of the towing wire. Samples were fixed with 4% formaldehyde buffered to pH 8.0–8.2 using disodium tetraborate (borax; Na₂B₄O₇·10H₂O) and stored in plastic containers. Prior to analysis, the material was concentrated to 100–150 cm³ and divided into sub-samples. Quantitative (abundance and biomass based on species-specific individual weights) and qualitative (taxonomic composition) analyses were carried out in a Bogorov chamber under a stereoscopic zoom microscope. At least 100 individuals of each of the three dominant species were counted per sub-sample. According to Alexandrov et al. (2014), the abundance estimates for these groups have an accuracy of approximately 20%. Taxonomic identification followed Morduhay-Boltovskoy (1968, 1969, 1972). Samplingevent GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction. Creative Commons Zero v1.0 Universal https://spdx.org/licenses/CC0-1.0.html CC0-1.0 http://blackseadb.org/ North-western part of the Black Sea 30.081 32.168 46.755 46.012 notPlanned Olena Miasnikova Ukrainian Scientific Centre of Ecology of the Sea (UkrSCES) Oleksandr Leposhkin metadataProvider 2026-06-25T00:05:20.565+03:00 dataset Ukrainian Scientific Centre of Ecology of the Sea (UkrSCES) http://gp.sea.gov.ua:8082/ipt/resource?id=ukrmonitoring2003/v1.2.xml