ATH 352-01

Orangs

up to 9 yr betw. births

Birute Galdikas

  • Borneo
    • Tanjung Puting, Kalimantan
  • Research
    • field research since 1971
  • Rehab

Pongo species

  • Pongo alelii
    • Sumatra (7500 remain)
    • flatter face
    • smaller cheek padds, laryngeal sac
    • more sociable; food relatively plentiful
  • Pongo pygmaeus
    • Borneo (60K remain)
    • more prognathic
    • larger cheek pads & laryngeal sac (male long call)
    • more solitary when food scarce, but more sociable when food plentiful

Behavior

  • locomotion
    • quadrumanous climbing (vaulting)
  • male territoriality
    • quadripedal fist walking
  • obesity
    • mast fruiting
  • tool use
    • rain cover
    • getting food
  • roving male promiscuity
    • female preference for flanged males
    • male long call announces presence
    • female-infant dyads (little peer play)
  • fforced copulations
    • unflanged males
    • females lack allies
  • extreme proceptivity
    • nulliparous females
  • mothers & infants
    • long social bond
    • very low fertility rate

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