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The samples were preserved in 4% formaldehyde buffered to pH 8–8.2 with disodium tetraborate (borax) (Na₂B₄O₇·10H₂O) formalin solution (1 part 40% formaldehyde solution and 9 parts water/sample) and stored in plastic containers. In the laboratory, the samples were concentrated to 100–150 cm³ before being divided into sub-samples. A Bogorov's chamber was used for quantitative assessment (abundance and biomass calculation using species individual weight) and qualitative (taxonomic structure) processing of sub-samples. The sub-samples were examined using a Stereoscopic Zoom Microscope. At least 100 organisms from each of the three dominant species were counted in each sub-sample. The precision of the calculated abundance for organisms of the first three groups, counted up to 100 specimens, amounts to 20% (Alexandrov et al., 2014). Species were identified according to Morduhay-Boltovskoy (1968, 1969 and 1972).\n        \n        \n        ","language":"eng","homepage":"https://blackseadb.org/","citation":{"text":"Ukrainian Scientific Centre of Ecology of the Sea (UkrSCES) https://doi.org/10.15468/ve4mzf accessed via GBIF.org on 2026-10-14.","citationProvidedBySource":true},"contactsCitation":[],"lockedForAutoUpdate":false,"createdBy":"b9a1023a-e508-4168-a837-fa0781820a8b","modifiedBy":"crawler.gbif.org","created":"2026-08-10T11:26:26.424+00:00","modified":"2026-08-10T12:52:21.744+00:00","contacts":[{"key":7103434,"type":"ORIGINATOR","primary":true,"userId":[],"firstName":"Mykhailo","lastName":"NABOKIN","position":[],"email":[],"phone":[],"homepage":[],"organization":"Ukrainian Scientific Centre of Ecology of the Sea (UkrSCES)","address":[],"createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-08-10T12:52:21.707+00:00","modified":"2026-08-10T12:52:21.707+00:00"},{"key":7103435,"type":"METADATA_AUTHOR","primary":true,"userId":[],"firstName":"Oleksandr","lastName":"Leposhkin","position":[],"email":[],"phone":[],"homepage":[],"organization":"Ukrainian Scientific Centre of Ecology of the Sea (UkrSCES)","address":[],"createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-08-10T12:52:21.709+00:00","modified":"2026-08-10T12:52:21.709+00:00"},{"key":7103436,"type":"USER","primary":false,"userId":[],"firstName":"Oleksandr","lastName":"Neprokin","position":[],"email":["o.neprokin@gmail.com"],"phone":[],"homepage":[],"address":[],"createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-08-10T12:52:21.709+00:00","modified":"2026-08-10T12:52:21.709+00:00"},{"key":7103437,"type":"ADMINISTRATIVE_POINT_OF_CONTACT","primary":true,"userId":[],"firstName":"Olena","lastName":"Miasnikova","position":[],"email":[],"phone":[],"homepage":[],"organization":"Ukrainian Scientific Centre of Ecology of the Sea (UkrSCES)","address":[],"createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-08-10T12:52:21.710+00:00","modified":"2026-08-10T12:52:21.710+00:00"}],"endpoints":[{"key":1312395,"type":"DWC_ARCHIVE","url":"http://gp.sea.gov.ua:8082/ipt/archive.do?r=ukrmonitoring_2006","createdBy":"b9a1023a-e508-4168-a837-fa0781820a8b","modifiedBy":"b9a1023a-e508-4168-a837-fa0781820a8b","created":"2026-08-10T12:51:20.697+00:00","modified":"2026-08-10T12:51:20.697+00:00","machineTags":[]},{"key":1312394,"type":"EML","url":"http://gp.sea.gov.ua:8082/ipt/eml.do?r=ukrmonitoring_2006","createdBy":"b9a1023a-e508-4168-a837-fa0781820a8b","modifiedBy":"b9a1023a-e508-4168-a837-fa0781820a8b","created":"2026-08-10T12:51:20.606+00:00","modified":"2026-08-10T12:51:20.606+00:00","machineTags":[]}],"machineTags":[{"key":33141326,"namespace":"crawler.gbif.org","name":"crawl_attempt","value":"8","createdBy":"crawler.gbif.org","created":"2026-10-12T01:20:40.937+00:00"}],"tags":[],"identifiers":[{"key":471939,"type":"UUID","identifier":"fb80ef3e-ce45-4ab3-b506-2bf6a230c7d0","createdBy":"crawler.gbif.org","created":"2026-08-10T12:52:21.711+00:00","primary":false},{"key":471927,"type":"URL","identifier":"http://gp.sea.gov.ua:8082/ipt/resource?r=ukrmonitoring_2006","createdBy":"crawler.gbif.org","created":"2026-08-10T11:27:27.446+00:00","primary":false}],"comments":[],"bibliographicCitations":[],"curatorialUnits":[],"taxonomicCoverages":[],"geographicCoverages":[{"description":"North-western part of the Black Sea","boundingBox":{"minLatitude":-46.012,"maxLatitude":46.755,"minLongitude":-32.168,"maxLongitude":-30.081,"globalCoverage":false}}],"temporalCoverages":[{"@type":"range","start":"2006-03-02T00:00:00.000+00:00","end":"2006-11-15T00:00:00.000+00:00"}],"keywordCollections":[{"thesaurus":"GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml","keywords":["Samplingevent"]}],"project":{"title":"National Monitoring Studies 2006","contacts":[{"type":"METADATA_AUTHOR","primary":false,"userId":[],"firstName":"Oleksandr","lastName":"Leposhkin","position":[],"email":[],"phone":[],"homepage":[],"address":[]}],"awards":[],"relatedProjects":[]},"samplingDescription":{"methodSteps":[]},"countryCoverage":[],"collections":[],"dataDescriptions":[],"dataLanguage":"eng","pubDate":"2026-08-10T00:00:00.000+00:00","maintenanceUpdateFrequency":"NOT_PLANNED","maintenanceDescription":"","license":"http://creativecommons.org/publicdomain/zero/1.0/legalcode","dwca":{"coreType":"http://rs.tdwg.org/dwc/terms/Event","extensions":["http://rs.iobis.org/obis/terms/ExtendedMeasurementOrFact","http://rs.tdwg.org/dwc/terms/Occurrence"],"modified":"2026-08-10T12:52:21.641+00:00"},"approximateCounts":{"occurrenceCount":204}}