Channel catfish are the primary farmed fish species in the US, produced in earthen ponds in the Mississippi Delta. Their welfare needs and the challenges of pond aquaculture define this large industry.
Channel catfish welfare in pond aquaculture faces challenges intrinsic to the production system. Pond oxygen dynamics depend on algae photosynthesis that can fail during overcast periods, causing overnight depletion events that result in mass asphyxiation — individual fish experiencing oxygen stress before death. Disease outbreaks in the warm, high-density pond environment can spread rapidly. Harvest by seine net concentrates thousands of fish at extreme density with associated physiological stress. The welfare science for channel catfish specifically is less developed than for salmon and trout, creating a knowledge gap that limits evidence-based welfare improvement. Developing and implementing welfare standards specific to pond catfish production is a welfare science priority.