The Social Organisation of a Population of Sumatran Orang-Utans

@article{Singleton2002TheSO,
  title={The Social Organisation of a Population of Sumatran Orang-Utans},
  author={Ian Singleton and Carel P. van Schaik},
  journal={Folia Primatologica},
  year={2002},
  volume={73},
  pages={1 - 20}
}
Female orang-utans in a Sumatran swamp forest live in large, but stable, and widely overlapping home ranges. They preferentially associate with some of their female neighbours, possibly relatives, to form socially distinct clusters that also experience reproductive synchrony. Sexually mature males range more widely than females, but among them the dominant adult male has a relatively more limited range. His ranging and that of the subadult males reflect the local abundance of sexually… 

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