Social Strategies of the African Lion

Within the realm of social carnivores, lions (Panthera leo) are the sole representative of the large felids. While other Felidae may tolerate temporary associations with dependent offspring or receptive members of the opposite sex, lions are the only big cat where both males and females live in permanent social units. Each sex forms independent groups that come together to engage in a wide variety of social behaviors, including cooperative hunting, mutual defense of kills, cooperative territorial defense, and communal raising of young. Unique patterns of egalitarianism and flexible fission-fusion dynamics make this social structure distinctive among mammals. The bulk of our knowledge on the evolutionary drivers of lion sociality has been derived from extensive studies of populations inhabiting mesic and productive eastern African savanna systems. However, lions across Africa occupy a wide variety of habitat types, including arid deserts, seasonally flooded wetlands, and densely thicketed scrub. Comparison of lion behavior and interactions across their range reveals that their social strategies are highly plastic and adapt to maximize survival and fitness under prevailing local conditions. In this chapter, we first review the ultimate drivers of lion gregariousness based on research from eastern Africa and discuss how lions optimize individual fitness under constraints imposed by group-living. We then explore how variation in proximate drivers of social living (i.e., resource availability, intensity of inter- and intra-specific competition, and habitat structure) can shape the expression of social behavior. We end with a discussion of the social adaptations lions make to survive in increasingly human-dominated landscapes.