Pelagic distribution and night foraging of early juvenile European catfish (Silurus glanis L.).

Abstract

This study provides evidence of pelagic occurrence and night feeding in early juvenile European catfish that contributed 0.2% to the early juvenile pelagic community at night in Klíčava, 0.3% in Římov, and 3.3% in Žlutice Reservoirs in the Czech Republic. The catfish occurred mostly at a depth of 2-4 m. Their abundance was 5.5 inds.1000 m^-3 in Klíčava Reservoir (2018), 0.3 inds.1000 m^-3 in Římov Reservoir (2018), and 88.8 inds.1000 m^-3 in Žlutice Reservoir (2019). Catfish fed on phantom midges (Chaoborus sp.).