Crowding-induced physiological stress, not aggression, makes high stocking density more worthy of attention in aquaculture

Key Points

• Physiological stress increases significantly with higher stocking density in aquaculture systems, affecting fish health and welfare.
• Key evidence shows that elevated crowding results in stress responses rather than aggression, which can lead to negative outcomes in fish behavior.
• The analysis of fish reactions under varying stocking densities indicates a need for adjusted management practices to improve conditions.
• Highlights the important role of stress management in aquaculture, as current approaches may overlook physiological impacts.