Co–Residence between Males and Their Mothers and Grandmothers Is More Frequent in Bonobos Than Chimpanzees
Figure 2
Female and male survivorship in captive bonobos and chimpanzees.
The survivorship function is the probability of surviving discrete time intervals. (A) Adult captive bonobo females had significantly higher rates of survival than captive chimpanzee females (P – value from permutation procedure = 0.011). (B) Among adult males, bonobos showed only a trend to survive better then chimpanzees (P – value from permutation procedure = 0.060).