Channel catfish are the most farmed fish in the United States. Welfare conditions in extensive pond systems and welfare during processing require evidence-based improvement.
Channel catfish pond aquaculture provides a more naturalistic rearing environment than most aquaculture systems — large earthen ponds with substrate, depth variation, and some habitat complexity. However, production densities in commercial ponds are high, water quality management is challenging, and oxygen depletion events cause acute welfare harm and mass mortality. Active aeration management during warm nights is the primary welfare protection against hypoxia events.
Harvest welfare is the most significant welfare event in catfish production. Seine-netting concentrates fish at extreme density — crowding stress is severe and oxygen depletion rapid. The time from crowding to killing determines total welfare harm during harvest. Rapid, efficient processing that minimizes crowding duration is the welfare-optimal approach.