Impala herds have complex social structures that are disrupted by selective trophy hunting of large males, with cascading welfare consequences for remaining group members.
Trophy hunting of dominant male impala causes welfare disruption beyond the individual killed. The removal of territorial males triggers intensive competition among remaining males causing fighting injuries, stress, and disruption to female herds that affects reproductive success. Females in herds with unstable male tenure show higher stress indicators and reduced calf survival. Welfare-informed trophy hunting management should consider these social impacts rather than simply counting animals harvested.