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The Predation Impact of Larval Pseudorasbora parva (Cyprinidae) on Zooplankton: a Mesocosm Experiment

ABSTRACT The impact of larvae of the fish Pseudorasbora parva on a zooplankton community was studied by adding the fish to tanks housing a zooplankton community established with resting eggs from the bottom sediment of a lake. The fish strongly depressed the populations of most planktonic cladoceran and rotifer species but not the abundances of copepod nauplii or the periphytic rotifers Monostyla spp. and Lecane spp. Gut content analyses showed that the fish larvae strongly selected for the periphytic rotifer Lecane spp.