Call diversity of wild male orangutans: a phylogenetic approach
Article first published online: 4 DEC 2006
© 2006 Wiley-Liss, Inc.
American Journal of Primatology
Volume 69, Issue 3, pages 305–324, March 2007
How to Cite
Ross, M. D. and Geissmann, T. (2007), Call diversity of wild male orangutans: a phylogenetic approach. Am. J. Primatol., 69: 305–324. doi: 10.1002/ajp.20356
- Issue published online: 29 JAN 2007
- Article first published online: 4 DEC 2006
- Manuscript Accepted: 22 MAY 2006
- Manuscript Revised: 18 MAY 2006
- Manuscript Received: 23 JAN 2005
- Aalborg Zoo
- Allwetterzoo Münster
- Christian Vogel Fonds
- Forschungszentrum Jülich GmbH
- Freundeskreis der Universität Hannover e.V.
- Gibbon Foundation
- Lorraine P. Jenkins Memorial Fellowship for Orangutan and Rainforest Research
- Lucie Burgers Foundation for Comparative Behaviour Research in Arnhem (The Netherlands)
- Münchener Tierpark Hellabrunn AG
- Protect the Wild e.V.
- Quantum Conservation e.V.
- Stichting Apenheul
- Tiergarten Schönbrunn
- Zoo Karlsruhe (EEP-Koordination Orang-Utan)
- orangutans (Pongo spp.);
- long call;
- call diversity;
- population differences;
Over the past 20 years several studies have attempted to clarify orangutan systematics based on DNA sequences and karyological and morphological data; however, the systematic and phylogenetic relationships among orangutan taxa remain controversial. Surprisingly, few systematic studies have used data from wild-living orangutans of exactly known provenance. Furthermore, most of these studies pooled data from huge geographic areas in their analyses, thus ignoring possibly distinct subpopulations. This study represents a new approach to orangutan systematics that uses orangutan long calls. Long calls are species-specific vocalizations used by many nonhuman primates, and data on their acoustical and temporal structures have been used to assess the relationships among, and phylogenies of, several primate taxa. Altogether, 78 long calls from wild-living orangutans from five populations in Borneo and five in Sumatra were included in the analyses. Aside from the chiefly paraphyletic topology of cladistic results, which neither support nor reject a Borneo-Sumatra dichotomy, bootstrap values support three monophyletic clades (northwest Borneo, northeast-east Borneo, and Ketambe) that corroborate geographic groups. The shortest trees and multivariate analyses provide some support for a closer relationship between Sumatran and specific Bornean demes than between particular Bornean demes themselves, indicating that conservation management should be based on orangutans from different populations rather than on just the two island-specific groups. Am. J. Primatol. 69:1–20, 2007. © 2006 Wiley-Liss, Inc.