Ichtiofauna systemu rzeki Brdy
Journal Title: Roczniki Naukowe Polskiego Związku Wędkarskiego - Year 2015, Vol 28, Issue
Abstract
Research on species composition, distribution, and abundance of fish fauna in the Brda River system (left-bank tributary of the lower Vistula River) was carried out in 2011–2014. A total of 15863 individuals representing 33 species of fish and lampreys were caught at 113 sites. Gudgeon, stickleback, pike and perch were the most widespread species, while perch, gudgeon, roach and brown trout were dominants in abundance. Despite good water quality, high woodiness and little urbanized land in the catchment, most rheophilic species had low biocenotic characteristics. In comparison to historical data, the status of riverine species is weak because of hydrotechnical barriers and regulation of streambeds. A 50 km long lotic stretch of the lower Brda River has been destroyed by the construction of a cascade of reservoirs (i.e. Koronowo, Tryszczyn and Smukała). Because of the barriers, upstream access for migratory species is possible only in the area of Bydgoszcz. The impact of lakes on the fish fauna was well visible in the upper part of the system. Racer goby was observed in the lower Brda. Another invasive species, Amur sleeper, was recorded at two sites.
Authors and Affiliations
Grzegorz Radtke, Rafał Bernaś, Piotr Dębowski, Jacek Morzuch, Michał Skóra
Keywords
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- EP ID EP72345
- DOI 10.12823/sapaa.0860-648X.15003
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