Causes of mortality in M group chimpanzees during 19 years (1980-1999)
Causes of mortality N Memo
Disease 56
Senescence 28
Within-species aggression 18 17 victims were infants
Predation at least 6 Occurred only 1989
Maternal death 4
Twin birth 2 Twin birth was observed only once
Snares 1
Unknown 91 @
Total 207 @
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