BLI Fish and Conservation Ecology Research Group

Leader of the research group: 
Profile of the group: 


We examine the biodiversity and organization of freshwater fish assemblages.

Our primary model system are the Danube and Lake Balaton and its catchment, which is affected by a variety of human impacts. The primary focus is to explore the environmental drivers of population dynamics and assemblage organization, and, from an applied perspective, to provide suggestions for environmental managers and conservationists to mitigate human impacts. Specifically, we examine the habitat use, ontogenetic diet patterns, trophic relationships, growth, and survival of fish in Lake Balaton. The main task of the monitoring of the waterbasin’s streams is to follow the distribution of non-native invasive species and to explore their impact on the native fauna. We also examine the organization of fish assemblages in the River Danube and its floodplain system.

Increasing emphasis is given to the study of the diversity and distribution of fish in a regional (country-wide) scale to develop monitoring systems for evaluating environmental health, to base conservation planning actions and to explore the effects of human impacts on freshwater biodiversity in the Pannon Ecoregion.

Selected publications:



Erős T, O’Hanley JR, Czeglédi I (2018): A Unified Model for Optimizing Riverscape Conservation Journal of Applied Ecology 55(4), 1871-1883.


Erős T, Takács P, Specziár A, Schmera D, Sály P. (2017): Effect of landscape context on fish metacommunity structuring in stream networks. Freshwater Biology 62: pp. 215-228.
Takács P, Czeglédi I, Ferincz Á, Sály P, Specziár A, Vitál Z, Weiperth A, Erős T (2017): Non-native fish species in Hungarian waters: historical overview, potential sources and recent trends in their distribution. Hydrobiologia 795(1):1-22


Takács P, Erős T, Specziár A, Sály P, Vitál Z, Ferincz Á, Molnár T, Szabolcsi Z, Bíró P, Csoma E (2015): Population genetic patterns of threatened European mudminnow (Umbra krameri Walbaum, 1792) in a fragmented landscape: - implications for conservation management. PloS one, 10(9), e0138640.