Abstract
Two baboon troops from different ecological conditions — a thicket savanna in Queen Elizabeth Park, and a forest edge in the Budongo Forest — were studied during a 15 month period. Two different social structures were found and various levels of aggressive activity were observed, both among males and among females and juveniles. The patterns of female sexual behavior differed widely between the two troops. These patterns are examined, and the genetic and environmental factors involved in the determination of aggressive and sexual behavior among baboons are discussed.