Ichtiofauna Bugu
Journal Title: Roczniki Naukowe Polskiego Związku Wędkarskiego - Year 2010, Vol 23, Issue
Abstract
The Bug River is the longest tributary (772 km) of the Narew River. The present study describes and analyses the fish fauna of three river sections, whose total length is 587 km. The first section flows along the border between the Ukraine and Poland (UKR-POL), the second along the border between Belorussia and Poland (BIA-POL) and the third inside of Poland (POL), till the backwater of the Zegrzyński Reservoir. The river is still polluted in all the sections, but most severely in the border sections. However, it is meandering in a natural floodplain and it is connected with numerous oxbow lakes, because levees are very scarce there, and occur only in the POL section. Electrofishing was carried out in 2007–2009 at 56 sites, which were located at the distance of about 10 km from each other. Altogether, 27 323 individuals representing 31 fish and one lamprey species were caught. Only bleak (46.9%) and roach (19.4%) were numeric dominants, both with the stability of occurrence of 100%. Average total abundances of fish collected in a sample in sections UKR-POL and BIA-POL were 11 and 7 times smaller than in POL. Numbers of taxa in these sections were 21, 22 and 30, respectively. Obligatory riverine species are threatened in the river, with exception of chub in POL. Two non-native species of Neogobius, N. fluviatilis and N. gymnotrachelus, were recorded. In POL, both were abundant, in BIA-POL, both were rare, and in UKRPOL, the former was rare and the latter was absent.
Authors and Affiliations
Tadeusz Penczak, Andrzej Kruk, Wanda Galicka, Szymon Tybulczuk, Lidia Marszał, Dariusz Pietraszewski, Mariusz Tszydel
Keywords
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