Monitoring ichtiofauny systemu rzecznego Liswarty: kontynuacja w latach 2012–2013
Journal Title: Roczniki Naukowe Polskiego Związku Wędkarskiego - Year 2014, Vol 27, Issue
Abstract
The structure and abundance of fish fauna of the Liswarta River system, the largest left side tributary of the Warta River, were investigated at 30 sampling sites in 2012 and 2013. A total of 9119 specimens weighing 178 kg were captured by electrofishing (standard CPUE method). Among 27 recorded species roach, perch, and gudgeon dominated in abundance, biomass and frequency of occurrence in the whole river system. The species composition of fish assemblages in the middle section of the Liswarta River and some of its tributaries are under strong influence of adjacent fishponds. The highest number of species, including many reophils, was noted in the lower section of the Liswarta River and some tributaries that inflow there, e.g. the Biała Oksza, Kocinka. In general the fish abundance in the main river of the system was low and a majority of the fish represented by small individuals, rarely achieving their size limits. In comparison to surveys carried out in 1996–98 there were no important changes in species composition, except for disappearance of barbel, arrival of Amur sleeper, which was not recorded previously, as well as introduction of brown trout and grayling to some sites in the Liswarta River system. Significant decreases of distribution areas were found for gudgeon, stone loach, stickleback and sunbleak.
Authors and Affiliations
Joanna Grabowska, Lidia Marszał, Bartosz Janic, Dariusz Pietraszewski, Dagmara Rachalewska, Grzegorz Zięba, Szymon Tybulczuk
Keywords
Related Articles
- EP ID EP72563
- DOI 10.12823/sapaa.0860-648X.14002
- Views 149
- Downloads 0
Ichtiofauna dorzecza Motławy
The fish fauna composition was investigated in the Motława River system by the electrofishing method from August to October 2010. A total of 6196 fish and lampreys individuals representing 31 species were captured in 57...
Rezultaty chowu narybku pstrąga potokowego (Salmo trutta m. fario L.) zaszczepionego przeciw furunkulozie w kontekście jego pochodzenia, ryby hodowlane (F3) vs. ryby dzikie
Three groups of brown trout were reared from fry till the fingerling stage. Group F and K originated from farmed brood stock, group P from wild fish. Group F was immersion-inoculated against furunculosis. The survival, g...
Ichtiofauna Dzikiej Orlicy (dorzecze Łaby, Polska) – dziesięć lat później
The work is a continuation of a monitoring study, started in 2003–2005, of the ichthyofauna of the Dzika Orlica River, which along the first 33 km of its course forms a natural border between Poland and the Czech Republi...
Dieta stadium parr troci wędrownej (Salmo trutta trutta) na tle warunków pokarmowych trzech niewielkich leśnych cieków
The aim of this study was to determine the diet of sea trout fry parr stage for the qualitative and quantitative composition of benthos in three small forest streams. We found that the streams were abundant in food, whic...
Ichtiofauna systemu rzecznego Nysy Kłodzkiej
The ichthyofauna of the Nysa Kłodzka River system (Odra basin) was investigated in years 2000–2004 using electrofishing (standard CPUE methods) at 126 sampling sites. The occurrence of 33 lamprey and fish species (27 nat...