The effect of feeding enrichment methods on the behavior of captive Western lowland gorillas
Three feeding enrichment treatments were tested in an outdoor yard used by six Western lowland gorillas (Gorilla gorilla gorilla). In “Yard-toss,” forage was thrown by hand over one third of the yard. In “Set-up,” forage and browse were hand-scattered throughout the yard. “Set-up Enriched” was similar with the addition of either a hay- and forage-filled […]
Ecological and social factors affect the occurrence and outcomes of intergroup encounters in chimpanzees
Male chimpanzees, Pan troglodytes, defend group territories, and sometimes injure or kill members of other groups. To test which factors best predict the occurrence and outcomes of intergroupencounters, we analysed 15 years of data on intergroupencounters, party composition, ranging and feeding behaviour in the Kanyawara community of chimpanzees, Kibale National Park, Uganda. During this time, […]