Group augmentation, collective action, and territorial boundary patrols by male chimpanzees

KE Langergraber, DP Watts… - Proceedings of the …, 2017 - National Acad Sciences
How can collective action evolve when individuals benefit from cooperation regardless of
whether they pay its participation costs? According to one influential perspective, collective …

Social bonds predict dominance trajectories in adult male chimpanzees

J Bray, JT Feldblum, IC Gilby - Animal Behaviour, 2021 - Elsevier
Highlights•Some species form social bonds that facilitate cooperation and provide
benefits.•Adult male chimpanzees form some of the strongest and most stable social …

DomArchive: a century of published dominance data

ED Strauss, AR DeCasien… - … of the Royal …, 2022 - royalsocietypublishing.org
Dominance behaviours have been collected for many groups of animals since 1922 and
serve as a foundation for research on social behaviour and social structure. Despite a …

Social relationships among adult male chimpanzees (Pan troglodytes schweinfurthii): variation in the strength and quality of social bonds

J Bray, IC Gilby - Behavioral Ecology and Sociobiology, 2020 - Springer
Socioecological environments that promote frequent interaction and social tolerance have
favored the evolution of strong and equitable social bonds, which facilitate cooperation and …

Adolescent male chimpanzees (Pan troglodytes) form social bonds with their brothers and others during the transition to adulthood

AA Sandel, KE Langergraber… - American Journal of …, 2020 - Wiley Online Library
Social relationships play an important role in animal behavior. Bonds with kin provide
indirect fitness benefits, and those with nonkin may furnish direct benefits. Adult male …

Social relationships between chimpanzee sons and mothers endure but change during adolescence and adulthood

RB Reddy, AA Sandel - Behavioral Ecology and Sociobiology, 2020 - Springer
Mothers provide indispensable care for infants in many mammalian species. In some long-
lived species, the maternal-offspring bond persists after infancy with mothers continuing to …

Competitive ability determines coalition participation and partner selection during maturation in wild male chimpanzees (Pan troglodytes schweinfurthii)

DK Enigk, ME Thompson, ZP Machanda… - Behavioral Ecology and …, 2020 - Springer
Social mammals often live in groups in which a dominance hierarchy is an important
determinant of access to mates. In addition to competing individually, males may form …

[HTML][HTML] Puberty initiates a unique stage of social learning and development prior to adulthood: Insights from studies of adolescence in wild chimpanzees

RB Reddy, AA Sandel, RE Dahl - Developmental Cognitive Neuroscience, 2022 - Elsevier
In humans, puberty initiates a period of rapid growth, change, and formative
neurobehavioral development. Brain and behavior changes during this maturational window …

Incomplete control and concessions explain mating skew in male chimpanzees

J Bray, AE Pusey, IC Gilby - Proceedings of the Royal …, 2016 - royalsocietypublishing.org
Sexual selection theory predicts that because male reproductive success in mammals is
limited by access to females, males will attempt to defend access to mates and exclude …

The development of affiliative and coercive reproductive tactics in male chimpanzees

RB Reddy, KE Langergraber… - … of the Royal …, 2021 - royalsocietypublishing.org
Like many animals, adult male chimpanzees often compete for a limited number of mates.
They fight other males as they strive for status that confers reproductive benefits and use …