Female and male survivorship in captive bonobos and chimpanzees.

<p>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 (<i>P</i> – value from permutation procedure = 0.011). (B) Among adult males, bonobos showed only a trend to survive better then chimpanzees (<i>P</i> – value from permutation procedure = 0.060).