Pelagic Surveys in the Bulgarian Sector of the Black Sea 2020-2021

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The monograph presents the pelagic trawl surveys were accomplished in 2020-2021 in the Bulgarian Sector of the Black Sea. A scientific team has produced a biological analysis of the results obtained from the survey. The biological analysis is based on the biomass of the species found during the study. Besides, an analysis of the distribution and abstraction of the other species caught as by-catch is presented. Sprat (Sprattus sprattus) is a key species for the Black Sea ecosystem. Together with the anchovy, sprat is one of the most abundant, planktivorous, pelagic species. The level of its stocks depends on the conditions of the environment mainly and on the fishing effort.