Table 1.

Sample demographic characteristics

Species	Age	Sex
Bonobo	Adult: 27 (73%) Juvenile: 10 (27%)	Female: 19 (51.4%) Male: 18 (48.6%)
Chimpanzee	Adult: 70 (85.4%) Juvenile: 11 (13.4%) Infant: 1 (1.2%)	Female: 45 (54.9%) Male: 37 (45.1%)
Gorilla	Adult: 90 (78.2%) Juvenile: 24 (20.9%) Infant: 1 (0.9%)	Female: 63 (54.8%) Male: 52 (45.2%)
Orangutan	Adult: 84 (70%) Juvenile: 27 (22.5%) Infant: 9 (7.5%)	Female: 65 (54.2%) Male: 55 (45.8%)
Hylobatid	Adult: 77 (82.8%) Juvenile: 13 (14%) Infant: 3 (3.2%)	Female: 44 (47.3%) Male: 47 (50.5%) Unknown: 2 (2.2%)
Cercopithecine	Adult: 42 (85.7%) Juvenile: 7 (14.3%)	Female: 28 (57.1%) Male: 21 (42.9%)