Blocking efficiency of electrified barrier for guiding juvenile grass carp (Ctenopharyngodon idella) by pulsed direct current with different electric parameters at different flow velocities

• SHI Xunlei, 
• HU Cheng, 
• DA Wa, 
• NI Ma, 
• WANG Qingfu, 
• SHI Xiaotao, 
• LIU Guoyong