Silver carp are among the most produced fish globally in Chinese polyculture systems, with welfare considerations around their sensitivity, live transport, and mass harvest conditions.
Silver carp welfare in polyculture systems is affected by their sensitive nervous systems and strong startle responses. The characteristic jumping behavior when disturbed by boat noise suggests they experience significant stress from operational activities including feeding and harvesting. During mass harvest when pond water levels are lowered, crowding stress is extreme. Live transport over long distances in crowded, heated tank trucks causes sustained physiological stress. The live fish market trade subjects silver carp to prolonged holding in potentially poor water quality before slaughter by methods that may not minimize suffering. The enormous production scale means aggregate welfare impacts are significant.