Common carp are farmed extensively across Europe and Asia. Understanding their social dynamics and space requirements helps design systems that minimise welfare problems.
Carp farmed at high densities without environmental complexity experience elevated chronic stress from social competition and lack of habitat structure. Dominant individuals monopolise feeding areas, causing subordinate fish to experience nutritional disadvantage and elevated cortisol. While carp are resilient animals, their welfare in intensive systems is compromised relative to the enriched environments they would choose. Best practice systems provide space, structure, and multiple feeding points that reduce aggressive competition.