Effect of benthivorous bream (Abramis brama) and carp (Cyprinus carpio) on resuspension

Summary

The effect of benthivorous bream and carp on resuspension was studied in 16 ponds (mean depth lm, 0.1 ha, clay sediment). The ponds were stocked with biomasses varying from 50–500 kg/ha with and without perch (Perca fluviatilis). Two reference ponds were used, one with only perch and one without fish. Sediment traps were used to determine the amount of resuspension. Per 100 kg/ha bream 61g/m²/day sediment was resuspended and 9 mg/1 remain in suspension. No relation was found between the size of the fish and the amount of resuspension, but bream had twice larger effect than carp.