Western gorilla silverbacks are the social and emotional center of their family groups — their welfare determines the wellbeing of all group members, and managing aging or displaced silverbacks poses unique challenges.
The silverback occupies a unique welfare position in gorilla society — his psychological state shapes the social environment for every group member. A confident, healthy silverback creates a stable, low-stress social environment; an anxious, ill, or socially displaced silverback creates instability that cascades through the group. Managing the transition of silverback leadership — through aging, injury, or death — is one of the most challenging welfare situations in gorilla husbandry. Solitary silverbacks awaiting group placement experience social isolation profoundly at odds with their evolutionary social needs. Cardiovascular disease is the leading cause of death in zoo gorillas, making cardiac monitoring a core component of welfare management.