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Mojmír Vašek

Mojmír Vašek

Mgr. Mojmír Vašek, Ph.D.

Aquatic Ecologist
Jiří Peterka Group

Researcher ID: C-5839-2014

Soil & Water Research Infrastructure

  • Biology Centre CAS
  • Na Sádkách 7, 370 05 České Budějovice
  • Czech Republic

I am a research scientist at the Institute of Hydrobiology and the SoWa RI (Biology Centre CAS). My scientific interests extend across the fields of fish ecology, trophic interactions and their role in food web structure, ecosystem functions and their responses to anthropogenic stress, sustainable water use and integrated catchment management. I have conducted research in many natural and artificial freshwater systems, particularly lakes, in the Czech Republic and abroad (Austria, Netherlands, Kenya). I have been the leader of three national research projects and participated in several other national and international projects.

Education and Academic Positions

  • 2005 PhD in Ecology, University of South Bohemia, Czech Republic
  • 1999 MSc in Ecology, University of South Bohemia, Czech Republic
  • 1996 BSc in Biology, University of South Bohemia, Czech Republic

Research Interests

  • Ecology of freshwater fishes
  • Trophic interactions in aquatic systems
  • Stable isotope analyses in aquatic ecology
  • Effects of anthropogenic stressors on aquatic environments
  • Management of standing water bodies and their catchments


  • Fish stock assessments in lakes and reservoirs
  • Analyses of fish stomach contents
  • Consultancy in stable isotope (C, N) techniques in aquatic ecology


Find our projects, facilities, lectures, publications, presentations, patents, grants, events and news


Optimal gillnet sampling design for the estimation of fish community indicators in heterogeneous freshwater ecosystems

Monitoring of biota in heterogeneous ecosystems requires sampling in different habitats and across environmental gradients. The resulting...


Distribution of Herbivorous Fish Is Frozen by Low Temperature

The number of herbivores in populations of ectothermic vertebrates decreases with increasing latitude. At higher latitudes, fish consuming plant...


Who Is Who: An Anomalous Predator-Prey Role Exchange between Cyprinids and Perch

Piscivory in cyprinids (Cyprinidae) is extremely rare. Specifically, common bream (Abramis brama) and common carp (Cyprinus carpio) are...


Small fish use the hypoxic pelagic zone as a refuge from predators

1) Juvenile perch (Perca fluviatilis) often inhabit deep zones of lakes or reservoirs (metalimnion to hypolimnion). Using fry trawling and...