Assessment of fish passage in the Rolava river and estimated effects of its restoration on fish communities
The study examines the effects of river network fragmentation on populations of rheophilic fish species in the Rolava and Ohře river basins, with particular emphasis on assessing fish passage and the effectiveness of restoration measures. An analysis of the river inventory indicates a high degree of anthropogenic disturbance in the Rolava; of the 41 transverse structures identified, more than half constitute critical barriers over 0.6 m high that most native fish species are unable to overcome.