Hippopotamus social structure in wild and captive settings creates welfare interdependencies where group composition and resource access determine individual wellbeing.
Hippo social structure creates welfare interdependencies where individual welfare depends on position within the group hierarchy and access to the water and feeding resources that hierarchy controls. Subordinate hippos denied adequate water access by dominant bulls experience genuine welfare harm from thermal stress — the physiological consequence of insufficient immersion time in hot conditions. Human encroachment compressing hippo habitat into reduced water bodies intensifies these hierarchical conflicts, creating welfare cascades through the group. Understanding hippo social welfare requires seeing the group as a welfare system, not just a collection of individuals, where management of social dynamics is as important as management of environmental conditions.