Ichtiofauna dorzecza Krzny
Journal Title: Roczniki Naukowe Polskiego Związku Wędkarskiego - Year 2011, Vol 24, Issue
Abstract
The Krzna River belongs to the biggest tributaries of the Bug River. The present study describes and analyses the sampled fish fauna of the main channel and its ten tributaries. Fish were sampled in 43 sites (August 2010) which were located at the distance of about 10 km from each other. Samples were collected using two-anode dipnets from a boat rowed along a 500 m section of bank line or while wading in shallow sites, along 100 m reaches; in the latter case the whole width of a sampled stream was affected by electric field. Altogether, 12773 individuals representing 24 fish and one lamprey species were caught. Only roach (24.58%) and bleak (16.51%) were numeric dominants, the former one with the constancy of occurrence of 67.44%, and the latter one of 48.84%. Obligatory riverine species were rare ones and they were sampled in the main channel and some tributaries only. The impact of the recipient river (i.e. the Bug River) on fish diversity in the Krzna River catchment was assessed with the multiplicative partitioning of the N1species diversity measure. The impact turned out to be monotonically increasing with decreasing distance from the recipient.
Authors and Affiliations
Tadeusz Penczak, Łukasz Głowacki, Grzegorz Zięba, Lidia Marszał, Wanda Galicka, Szymon Tybulczuk, Mariusz Tszydel, Bartosz Janic
Keywords
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- EP ID EP73491
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