Study on silver carp stocking for controlling water bloom in urban rivers and lakes of Beijing

Key words: 
• silver carp /
• stocking /
• water bloom

Abstract: This article introduces the study on water bloom controlling by silver carp in urban rivers and lakes of Beijing, analyzes the influence of stocking of silver carp on water quality and plankton through the in situ enclosure experiment with different stocking densities (0,17,51,103 g/m3). The results show that, stocking of silver carp make the zooplankton biomass very low in the enclosures with fish, thereby, make the phytoplankton affected by fish directly but not by zooplankton. At the same time, the middle density (51 g/m3) stocking of silver carp can effectively control cyanophyta and picophytoplankton growth, and make the algae biomass lowest.