HOPE report

Number: 24-003

Analysis of social structure of wild Javan lutungs (Trachypithecus auratus)


Date: 2012/10/7 - 2012/12/30

I stayed at Pangandaran Nature Reserve located at western Jawa, Indonesia from 10 Oct to 27 Dec, and conducted a field survey for wild Javan lutungs (Trachypithecus auratus): I observed two groups of the lutungs (K and P group) for 36 days (389hours), and recorded their diets, activity, and social relationships. I also identified individual lutung by taking reference photos. I succeeded to identify almost all individuals of K group, and all adults of P group, respectively. Besides I conducted vegetation survey within a home range of the P group, recorded plant phenology within the reserve twice a month, and collected dietary samples for nutritional analyses.

I actively communicated with Indonesian researchers/students. I had a lecture on feeding ecology of primates at Bogor Agricultural University (IPB) on 8th Oct, visited IPB Primate Research Center on 9th Oct and discussed with researchers there, and attended closed examination of a doctor course student on 17th Dec.


Javan lutungs feeding young leaves of kibacata 

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