Vliv revitalizačních opatření na rybí společenstva v regulovaném podhorském toku

Abstract

This bachelor thesis focuses on the analysis of a planned revitalization project of the Rybná stream in the Rajecká Valley and assesses its predicted impact on the population of brown trout (Salmo trutta) and Carpatgian bullhead (Cottus poecilopus). The theoretical part of the thesis summarizes the history of river regulations, revitaliztion measures and details the environmental requirements of both target species with a focus on their specific biological traits. The practical part provides detailed description of the technical parameters of the planned interventions, particulary the installation of large woody debris (LWD), channel widening, and the strategic placement or removal of large instream structures. The primary contribution of the work is the prediction of the effects of these modifications on the ecological stability of the stream. The conclusion discusses future management options for the locality, including the potential for establishing a fish study reserve and implementing a long-term monitoring program for the local biota.