Javan Gibbon Rescue
and Rehabilitation Centre: |
Texts and information by Dianne Gates and Christine Baker.
Editing and references by Thomas Geissmann.
August 2001
The Javan or silvery gibbon (Hylobates moloch)
is endemic to the Indonesian island of Java and one of the most endangered gibbon
species. The species has been rated as critically endangered by the criteria of the
IUCN (Hilton-Taylor, 2000). The remaining population in the wild has been estimated
at between 400 to 3,000 animals in the wild, occurring in about 20 forested areas
mainly scattered over West Java (Asquith et al., 1995; Kappeler, 1984; Supriatna
et al., 1994). Several of the smaller sub-populations are considered non-viable in
the long-term. Although recent discoveries show that the Central Javan population
may be larger than previously assumed (Nijman & van Balen, 1998), population
estimates still suggest that intervention will be necessary in order to conserve
the species. Various conservation strategies and priorities have been discussed by
Asquith (2001). The taxonomy also needs to be resolved, because some molecular evidence
suggests that there may be two genetically discrete populations which should not
be mixed (Andayani et al., 2001).
In addition to gibbons remaining in the wild, approximately 80 gibbons are also kept
illegally as pets throughout Java, and it is those animals that are the focus of
this project. Conservation International-Indonesia and the Silvery Gibbon Project
(Perth, Australia) have agreed to collaborate on an effort that will help maximize
the contribution of Javan gibbons illegally held in captivity to the conservation
of this species.
The urgent situation for this species has been discussed at a Population and Habitat
Viability Analysis (PHVA) workshop in Cisarua in 1994 (Supriatna et al., 1994), at
a follow-up meeting in Bogor in 1997 (Supriatna et al., 1999), at a gibbon workshop
held at the Great Ape Conference in Chicago in 2000, and at the 18th International
Congress of the Primatological Society (IPS) in Adelaide in 2001.
One of the recommendations that have come out of these meetings was to establish
a Javan Gibbon Rescue and Rehabilitation Center. This center would house some the
gibbons currently held illegally as pets on Java. The Javan Gibbon Captive Breeding
Center would also be used for education and raising awareness, and to make the Javan
Gibbon an icon for Java, in the same way that awareness is now high for orang utans
in Sumatra and Borneo.
The Silvery Gibbon Project (SGP) of Perth, Australia, has made a commitment to fund
the Captive Breeding Center. The SGP was established in 1991 to assist the in-situ
conservation of the Javan gibbon. Funds are raised through events and activities,
generating money from members and other interested people.
Approximately US$30,000 has already been raised by the Silvery Gibbon Project. Conservation
International (USA based), in partnership with the Silvery Gibbon Project, then applied
to Margot Marsh Biodiversity Fund for US$35,000 and has been successful in receiving
matching funding (US$30,000). As a result, the Silvery Gibbon Project will be able
to support the construction, administration and staffing of the Javan Gibbon Rescue
and Rehabilitation Center.
During this project, an International Management
Committee for the Javan Gibbon will be formed of Indonesian and foreign experts,
a suitable site will be acquired for construction of a Javan Gibbon Rescue and Rehabilitation
Center, and illegally-held animals will be confiscated by Indonesian authorities.
The objective of the project is to place donated or confiscated Javan gibbons into
a rescue, rehabilitation, breeding and reintroduction program. The aim is to assess
their medical and psychological health, and to restore these gibbons to full health.
Essentially, the genetic material that these animals represent is considered too
important to be lost to efforts aimed at saving this species from extinction. The
Center will seek to utilize these animals for captive breeding, non-invasive research
and education. Pair formation and breeding of rehabilitated gibbons will be encouraged,
as will living in natural family groups following the anticipated breeding success.
As it has been designed initially, the Center could hold up to 16 adult gibbons at
one time, 10 in bonding enclosures and six in breeding cages, in addition to any
offspring that were produced. Since at least 80 animals are thought to be in private
hands on Java, provision will have to be made for the transfer of rehabilitated animals
and pairs to other zoological institutions in Indonesia (via the Indonesian Zoo Association,
PKBSI), as well as to foreign zoos and breeding programs in Asia, Europe and North
America. In addition, it is likely that facilities at the Center will have to be
expanded at some later date.
Should reintroduction of captive-bred animals to the wild ever become a possibility,
these ex-situ populations could someday provide the stock for such an experiment.
This objective however, is not short term as behavioral rehabilitation also involves
the gibbons abilities to form family groups. Any re-introductions would be based
on IUCN recommendations, along with specific guidelines for gibbon reintroduction
based on IUCN/SSC recommendations. As reintroduction of rehabilitated gibbons is
one of the final conservation strategies to be used for the conservation of doomed
populations, these gibbons should be managed at species level regardless of sub-species.
For the foreseeable future, however, successes achieved at this Center in terms of
rehabilitation and breeding will be targeted toward expanding the size and distribution
of this endangered species' captive population.
The permanent staff for the Javan Gibbon Rescue and Rehabilitation Center will be
Indonesian, with the provision for securing the services of expert advisors from
abroad, especially during the projectís early stages. Training in captive husbandry
techniques will be provided not only to permanent staff, but also to representatives
of PKBSI whose institutions are likely to receive captive gibbons via their collaboration
with the Center. One important output of this project will be the production of a
husbandry manual for distribution to institutions interested in housing and breeding
Javan gibbons.
This project will establish an International Management Committee for the Javan Gibbon.
Indonesian and foreign stakeholders, experts and interested parties will comprise
the Committee, and will represent the authority under which the Javan Gibbon Rescue
and Rehabilitation Center interacts with local, regional and national authorities,
as well as with foreign institutions, for the integrated management of wild and captive
Javan gibbon populations. In the initial stages of the project the Committee will
be composed of the following individuals:
Jatna Supriatna: Conservation International - Indonesia
Dianne Gates: Silvery Gibbon Project / Perth Zoo
Leif Cocks: International Studbook Keeper / Perth Zoo
Russell Mittermeier: Conservation International
Wahyudi Wardoyo: Indonesian Ministry of Forestry
Widodo Ramono: Indonesian Directorate of Forest Protection and Nature Conservation
David Ware: Independent Consultant
People interested in receiving additional information, in becoming members of the Silvery Gibbon Project or in financially supporting the project may contact:
Dianne Gates
The Silvery Gibbon Project
PO Box 335
Como, Western Australia 6952
Australia
Tel: +61-8-92 93 30 52
E-mail: sgp@silvery.org.au
http://www.silvery.org.au/
Andayani, N., Morales, J.C., Forstner, M.R.J., Supriatna,
J. & Melnick, D.J. (2001). Genetic variability in mtDNA of the silvery gibbon:
Implications for the conservation of a critically endangered species. Conservation
Biology 15: 770-775.
Asquith, N.M. (2001). Misdirections in conservation biology. Conservation Biology
15: 345-352.
Asquith, N.M., Martarinza & Sinaga, R.M. (1995). The Javan gibbon (Hylobates
moloch): Status and conservation recommendations. Tropical Biodiversity
3: 1-14.
Hilton-Taylor, C. (compiler) (2000). 2000 IUCN Red List of threatened species.
IUCN, Gland, Switzerland and Cambridge, UK.
Kappeler, M. (1984). The gibbon in Java. In Preuschoft, H., Chivers, D.J., Brockelman,
W.Y. & Creel, N. (eds.), The lesser apes. Evolutionary and behavioural biology.
Edinburgh University Press, Edinburgh, pp. 19-31.
Nijman, V. & van Balen, S. (1998). A faunal survey of the Dieng mountains, Central
Java, Indonesia: Distribution and conservation of endemic primate taxa. Oryx
32: 145-156.
Supriatna, J., Tilson, R., Gurmaya, K.J., Manansang, J., Wardojo, W., Sriyanto, A.,
Teare, A., Castle, K. & Seal, U. (eds.). (1994). Javan gibbon and Javan langur:
Population and habitat viability analysis report. IUCN/SSC Conservation Breeding
Specialist Group, Apple Valley, Minnesota, 112 pp.
Supriatna, J. & Manullang, B.O. (eds.). (1999). Proceedings of the international
workshop on Javan gibbon (Hylobates moloch) rescue and rehabilitation. Conservation
International Indonesia Program, and Center for Biodiversity and Conservation Studies,
University of Indonesia, Jakarta, 60 pp.
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