Orangutan Populations on Borneo
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FINAL REPORT ORANGUTAN Population and Habitat Viability Assessment 15-18 January 2004 Jakarta, Indonesia In Collaboration with: IUCN SSC Conservation Breeding Specialist Group IUCN SSC Primate Specialist Group Sponsored by: Borneo Orangutan Survival Foundation Orangutan Foundation 1 Orangutan PHVA Final Report August 2004 Cover photo copyright Orangutan Foundation. A contribution of the IUCN/SSC Conservation Breeding Specialist Group. Singleton, I., S. Wich, S. Husson, S. Stephens, S. Utami Atmoko, M. Leighton, N. Rosen, K. Traylor-Holzer, R. Lacy and O. Byers (eds.). 2004. Orangutan Population and Habitat Viability Assessment: Final Report. IUCN/SSC Conservation Breeding Specialist Group, Apple Valley, MN. IUCN encourages meetings, workshops and other fora for the consideration and analysis of issues related to conservation, and believes that reports of these meetings are most useful when broadly disseminated. The opinions and views expressed by the authors may not necessarily reflect the formal policies of IUCN, its Commissions, its Secretariat or its members. The designation of geographical entities in this book, and the presentation of the material, do not imply the expression of any opinion whatsoever on the part of IUCN concerning the legal status of any country, territory, or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries. © Copyright CBSG 2004 Additional copies of Orangutan Population and Habitat Viability Assessment can be ordered through the IUCN/SSC Conservation Breeding Specialist Group, 12101 Johnny Cake Ridge Road, Apple Valley, MN 55124, www.cbsg.org. Orangutan PHVA 2 Final Report August 2004 ORANGUTAN Population and Habitat Viability Assessment 5-18 January 2004 Jakarta, Indonesia TABLE OF CONTENTS SECTION 1. Executive Summary SECTION 2. Priorities for Conservation SECTION 3. Conservation Strategies Working Group SECTION 4. Sumatran Orangutan Working Group SECTION 5. Bornean Orangutan Working Group SECTION 6. Post-workshop Commentary SECTION 7. Pre-PHVA Data Collection Report: The Status of the Orangutan in Indonesia, 2003 SECTION 8. Participant List SECTION 9. Invitation List SECTION 10. VORTEX Reference 3 Orangutan PHVA Final Report August 2004 Map Credits Sumatra The Sumatra maps were created by Ian Singleton with considerable help from Riswan and Rachmadi A. Dadi of the Leuser Development Programme's GIS Dept. Field data used to compile the orangutan distribution was kindly made available by many sources, including Serge Wich, Carel van Schaik, Suci Utami, Dolly Priatna, Tine Guertz, Herman Rijksen, Erik Meijaard, Idrusman and Ibrahim. Much of the GIS work used in collating, analysing and mapping the data was carried out by Nick Jewel of the Leuser Management Unit. Borneo The data behind the Borneo orangutan distribution map comes from two different sources: 1) Ancrenaz, M. and Lackman-Ancrenaz, I. 2004. Orang-utan status in Sabah: distribution and population size; 2) Meijaard, E. and Dennis, R. 2003. Assessment of the extent of remaining habitat for Bornean Orangutan, based on 2002 forest cover data. At the workshop, the second set of data was edited by a host of people, overseen by cartographer Matt Doughty of UNEP World Conservation Monitoring Centre. Data contributors included: Simon Husson, Erik Meijaard, Andrew Hearn, Joanna Ross (for Bukit Baka); Fransiscus Harsanto (for Seruyan, Arut-Belantikan); Laura D'Arcy, Claire McLardy (for Katingan-Mendawai, Sungai Samba); Helen Morrogh-Bernard (Sebangau, Kahayan- Sebangau); Andrea Johnson (Gunung Palung); Birute Galdikas (Tanjung Puting); Carel van Schaik; Kisar Odom (Mawas); Dr. Kunkun (for Betung Kerihun); Togu Simorenangkir; Stephen Brend (Tanjung Puting); Dr. Akira Suzuki (Kutai); Andy Marshall (G. Palung + Berau). Orangutan PHVA 4 Final Report August 2004 FINAL REPORT ORANGUTAN Population and Habitat Viability Assessment 15-18 January 2004 Jakarta, Indonesia Section 1 EXECUTIVE SUMMARY 5 Orangutan PHVA Final Report August 2004 Orangutan PHVA 6 Final Report August 2004 Executive Summary Introduction Serious downward trends in the integrity of Indonesia’s forest estate occurred throughout the 1990s due to widespread logging and conversion for plantation agriculture. Some protected areas were, in retrospect, left relatively unscathed, while others suffered from devastating fires that resulted from unwise land-use practices. Since the change in government in 1998, however, conservation in Indonesia has seen a virtual collapse, and deforestation has been enormous regardless of the legal status of the land (Holmes 2000; Jepson et al. 2001; Robertson and van Schaik 2001). As a result, wild orangutans are in steady decline due to logging, habitat conversion, fires and poaching. Leading orangutan experts recognized that, in order to reverse this disaster, it was imperative to ascertain current population status and to develop and implement important conservation strategies. Therefore, the Conservation Breeding Specialist Group (CBSG) was invited to conduct a Population and Habitat Viability Assessment (PHVA) workshop for both Bornean (Pongo pygmaeus pygmaeus, Pongo pygmaeus wurmbii and Pongo pygmaeus morio) and Sumatran (Pongo abelii) orangutans to develop a strategic recovery plan for these threatened species and their habitat. The PHVA workshop was held 15-18 January 2004 and generously hosted by BOS Indonesia at the Schmutzer Primate Centre at Ragunan Zoo in Jakarta. Over 80 people participated in the PHVA (participants and invitees are listed in Sections 8 and 9 of this report, respectively). At the PHVA, orangutan population data were integrated with estimates of human-based threats, such as current and projected land-use patterns. Computer models were used to evaluate current and future risk of population decline or extinction under alternative management scenarios. Participants developed detailed management recommendations based on these and other analyses. The main task of this new PHVA workshop, a follow-up to the 1993 Orangutan PHVA, was to assess the current status of wild orangutan habitats and populations and their future. The specific objectives of the workshop were to assist Indonesia’s wildlife managers, policy makers, and scientists to: 1) formulate priorities for practical scientific management of the wild population; 2) develop a risk analysis and simulation population model for the wild populations; 3) suggest research priorities linked to preservation of the species; and 4) encourage communication and collaboration with government and non-government conservation programs. A briefing book including taxonomic information, distribution maps, field study synopsis, life history information and relevant, current published and unpublished materials was distributed to participants. This workshop report addresses the objectives listed above and reports all findings and updated information on orangutans of Borneo and Sumatra as well as the pre-PHVA field research. 7 Orangutan PHVA Final Report August 2004 Pre-workshop Data Collection To properly prepare for the workshop, a project was proposed and funded by Orangutan Foundation UK to assemble updated information on orangutan distribution and densities. Additional Sumatran surveys were conducted with the support of The Gouden Ark Foundation, The Netherlands. Without new information on orangutan life history parameters, the modeling component of the PHVA workshop would not give us the tools for proper population management given current conditions. Data gaps were identified in all of the previous workshops and the situation concerning orangutan habitat and population trends has changed drastically since 1993. In order to draw the greatest benefit from a gathering of experts, preparatory fieldwork was undertaken, coordinated by Dr. Carel van Schaik. The most urgent need was updated information on the current distribution of wild orangutans and the quality of their remaining habitat. In order to obtain the necessary data, the distribution maps produced by Rijksen and Meijaard (1999) were reviewed and the information updated through consultation with all relevant field experts. Based on their recommendations, priority survey areas were identified. Visits to these areas were conducted by several teams of Indonesian and international researchers to update distributional information, estimate densities on the ground, and record the nature of habitat disturbance. The findings were presented at the PHVA workshop. The project report, which compiles all the known data on oranguatn distribution, genetics and ecology, can be found in Appendix II of this document. The PHVA Process The Conservation Breeding Specialist Group (CBSG) was invited to serve as a neutral workshop facilitator and organizer. CBSG is a member of the Species Survival Commission of the IUCN - World Conservation Union, and for more than a decade has been developing, testing, and applying a series of science-based tools and processes to assist species management decision- making. One tool CBSG employs is use of neutral facilitators to moderate small working group sessions, as the success of the workshop is based on the cooperative process of dialogue, group meetings, and detailed modeling of alternative species and/or habitat management scenarios. Effective conservation action is best built upon critical examination and use of available biological information, but also very much depends upon the actions of humans living within the range of the threatened species. Motivation for organizing and participating