ATH 352-01

Gorillas, 4 species view:

  • G.g.diehli
  • G.g.gorilla
  • G.g.graueri
  • G.g.berengei
  • sympatric w/ chimps, avoid conflict

2 species view:

Gorilla gorilla

  • G.g.g.
    • western lowland gorilla
    • W. C. Afr., N of Congo river
    • 110k-200k left in wild
  • G.g.diehli
    • Cross River gorilla
    • small groups on border of Nigeria/Cameroon
    • ~150 left

Gorilla beringei

  • G.b.beringei
    • mtn gorilla
    • Rwanda Congo
    • 380 left
    • non captive
  • G.b.graueri
    • E. lowland gorilla
    • e. Congo, e of Congo river
    • 17k left
  • G.b.bwindi
    • SW Uganda
    • 320 remain, non captive

Mtn gorilla

  • herbal vegetation
    • less travel
    • more cohesive groups
  • males terrestrial
  • very high altitude

Lowland gorilla

  • fruit
    • range farther
    • less cohesive groups
  • males arboreal
  • low-to-high altitude

Social behavior

  • male & female both xfer
  • male-male competition
    • alliances among related males
  • females do not form strong alliances
  • silverback = focus of social life

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