Khao Y Ai, Thailand, 1994 Population and Habitat Viability Analysis Report for Thai Gibbons: Ylobates Jar and H
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Khao Y ai, Thailand, 1994 Population and Habitat Viability Analysis Report for Thai Gibbons: ylobates Jar and H. pileatus Submitted to the Royal Forest Department Kingdom of Thailand Edited by Schwann Tunhikorn Royal Forest Department, Bangkok, Thailand Warren Brockelman Mahidol University, Bangkok, Thailand Ronald Tilson Minnesota Zoo, Apple Valley, MN, USA Usum Nimmanheminda Zoological Parks Organization, Bangkok, Thailand Parntep Ratanakorn Kasetsart University, Bangkok, Thailand Robert Cook NYZS/International Wildlife Conservation Park, Bronx, NY, USA Andrew Teare Milwaukee County Zoo, Milwaukee, WI, USA Kathy Castle Minnesota Zoo, Apple Valley, MN, USA Ulysses Seal IUCN/SSC CBSG, Apple Valley, MN, USA A contribution of the IUCN/SSC Conservation Breeding Specialist Group and the Gibbon Species Survival Plan (SSP) of the American Zoo and Aquarium Association (AZA), in cooperation with the Royal Forest Department of Thailand. The primary sponsor of the PHVA workshop was The Asia Foundation (Bangkok). Other contributors include: the European Endangered Species Program (EEP) -- London, Twycross, Paigton, Fota WP, Edinburgh and Duisburg Zoos; and the American Zoo and Aquarium Association Gibbon Species Survival Plan -- Calgary Zoological Society and the Minnesota, Henry Doorly and Milwaukee Zoos. Cover photo: A wild black-phase white-handed gibbon (Hylobates lar) in Khao Yai National Park, Thailand. Photo by Warren Brockelman, Center for Conservation Biology, Mahidol University, Bangkok, Thailand. Population and Habitat Viability Analysis Report for Thai Gibbons: Hylobates lar and H pileatus. S. Tunhikorn, W. Brockelman, R. Tilson, U. Nimmanheminda, P. Rantanakorn, R. Cook, A. Teare, K. Castle and U. Seal (eds.). IUCN/SSC Conservation Breeding Specialist Group: Apple Valley, MN, 1994: 1-106. Additional copies of Population and Habitat Viability Analysis Report for Thai Gibbons: Hylobates lar and H pileatus can be ordered through the IUCN/SSC Conservation Breeding Specialist Group, 12101 Johnny Cake Ridge Road, Apple Valley, MN 55124. Send checks for US $35.00 (for printing and shipping costs) payable to CBSG; checks must be drawn on a US Bank. Funds may be wired to First Bank NA ABA No. 091000022, for credit to CBSG Account No. 1100 1210 1736. The work of the Conservation Breeding Specialist Group is made possible by generous contributions from the following members of the CBSG Institutional Conservation Council Conservators ($10,000 and above) Australasian Species Management Program Gladys Porter Zoo Arizona-Sonora Desert Museum Sponsors ($50-$249) Chicago Zoological Society Indianapolis Zoological Society Banham Zoo African Safari Columbus Zoological Gardens International Aviculturists Society Copenhagen Zoo Apenheul Zoo Denver Zoological Gardens Japanese Association of Zoological Parks Cotswold Wildlife Park Belize Zoo Fossil Rim Wildlife Center and Aquariums Dutch Federation of Zoological Gardens Claws 'n Paws Friends of Zoo Atlanta Jersey Wildlife Preservation Trust Erie Zoological Park Darmstadt Zoo Greater Los Angeles Zoo Association Lincoln Park Zoo Fota Wildlife Park Dreher Park Zoo International Union of Directors of The Living Desert Givskud Zoo Fota Wildlife Park Zoological Gardens Marwell Zoological Park Granby Zoological Society Great Plains Zoo Metropolitan Toronto Zoo Milwaukee County Zoo International Zoo Veterinary Group Hancock House Publisher Minnesota Zoological Garden NOAHS Center Knoxville Zoo Kew Royal Botanic Gardens New York Zoological Society North of England Zoological Society, National Geographic Magazine Lisbon Zoo Omaha's Henry Doorly Zoo Chester Zoo National Zoological Gardens Miller Park Zoo Saint Louis Zoo Oklahoma City Zoo of South Africa Nagoya Aquarium Sea World, Inc. Paignton Zoological and Odense Zoo National Audubon Society-Research White Oak Plantation Botanical Gardens Orana Park Wildlife Trust Ranch Sanctuary Zoological Society of Cincinnati Penscynor Wildlife Park Paradise Park National Aviary in Pittsburgh Zoological Society of San Diego Philadelphia Zoological Garden Perth Zoological Gardens PAAZAB Phoenix Zoo Porter Charitable Trust Parco Faunistico "La Torbiera" Guardians ($5,000-$9,999) Pittsburgh Zoo Rolling Hills Ranch (5 year commitment) Potter Park Zoo Cleveland Zoological Society Riverbanks Zoological Park Rostock Zoo Racine Zoological Society John G. Shedd Aquarium Royal Zoological Society of Antwerp Royal Zoological Society Tenerife Zoo Loro Parque Royal Zoological Society of Scotland of Southern Australia Tokyo Zoological Park Lubee Foundation San Francisco Zoo Rotterdam Zoo Touro Pare-France North Carolina Zoological Park Schoenbrunn Zoo Tierpark Rheine Toledo Zoological Society Sedgwick County Zoo Twycross Zoo Supporters ($25-$49) Sunset Zoo (10 year commitment) Union of German Zoo Directors Wild Animal Habitat Alameda Park Zoo Taipei Zoo Wellington Zoo Zoological Parks Board of American Loriinae Conservancy The WILDS World Parrot Trust New South Wales Brandywine Zoo The Zoo, Gulf Breeze, FL Zoo de la Casa de Campo-Madrid DGHT Arbeitsgruppe Anuren Urban Council of Hong Kong Welsh Mt. Zoo/Zoological Society of Protectors ($1,000-$4,999) Folsom Children's Zoo & Botanical Washington Park Zoo Wales Audubon Institute Garden Wassenaar Wildlife Breeding Centre Bristol Zoo International Crane Foundation Wilhelma Zoological Garden Caldwell Zoo Curators ($250-$499) Jardin aux Oiseaux Woodland Park Zoo Calgary Zoo Camperdown Wildlife Center King Khalid Wildlife Research Center Yong-In Farmland Cologne Zoo Emporia Zoo Lee Richardson Zoo Zoological Society of London Detroit Zoological Park Roger Williams Zoo Natal Parks Board Zurich Zoological Garden El Paso Zoo Thrigby Hall Wildlife Gardens Oglebay's Good Children's Zoo Federation of Zoological Gardens of Topeka Zoological Park Speedwell Bird Sanctuary Great Britain and Ireland Stewards ($500-$999) Tropical Bird Garden Fort Wayne Zoological Society Aalborg Zoo 1 December 1994 Contents 1: PHVA WORKSHOP INFORMATION Executive Summary, Schwann Tunhikorn & Ronald Tilson 1 Problem Statement, Ronald Tilson & Ulysses Seal 5 Opening Address, Pramote Saiwichian 9 Workshop Agenda and Participants 11 2: WORKING GROUP REPORTS Thai Gibbon Habitat and Population Status 17 Facilitators: Warren Brockelman & Yongyuth Trisurat Thai Gibbon Life History and Vortex Analysis 23 Facilitator: Ulysses Seal Human Demography and Community Participation 37 Facilitators: Samboon Wongpakdee & John Williams Genetic Aspects of Gibbon Management in Thailand 43 Facilitators: David Woodrvjf & Ronald Tilson Estimates of Captive Gibbons in Thailand 47 Preecha Ratanaporn & Tim Redford Captive Management Plan for Gibbons in Thailand 51 Facilitators: Usum Nimmanheminda Captive Management of Thai Gibbons 53 Facilitators: Visit Arsaithamkul, Kathy Castle, Reg Gates & Dan Morris Gibbon Diseases 61 Facilitators: Parntep Ratanakorn, Sumate Kamalnorranath, Robert Cook & Andrew Teare Selection of Gibbon Reintroduction Areas 83 Facilitators: Warren Brockelman & Yongyuth Trisurat Gibbon Rehabilitation and Release 87 Facilitators: Warren Brockelman, Preecha Ratanaporn, Tim Redford & TD. Morin SPARKS Training and Data Entry Assumptions 91 Facilitators: Sarah Christie, Kathy Castle, Andrew Teare & Reg Gates 3: ROYAL FOREST DEPARTMENT ACTION PLAN THAI GIBBON ACTION PLAN 93 Chairs: Schwann Tunhikorn, Ronald Tilson & workshop participants Recommendations for Wild Thai Gibbon Populations 93 Recommendations for Gibbon Monitoring and Habitat Protection 94 Recommendations for Thai Gibbon Captive Management 94 Recommendations for Gibbon Reintroduction Programs 95 Development of a Gibbon Conservation Strategy for Thailand 96 4: SUPPORTING REPORTS AND ARTICLES 97 Criteria for Rehabilitation of Gibbons, Warren Brockelman Evaluation of Captive Thai Gibbons, Robert Cook & Parntep Ratanakorn ~r · - --~---·--~-,~....,.--.- .. ~.------·-- ;·,_,_ .··,:.-;:::'··:\-::;z~:::;\;:;;.t7Pr£~Y:~~~~~~~~--;:;?:~-?<·;:-·~'::_----- t: Paholyothin Road, Jatujak Bangkok 10900 Thailand. J an.uary. · 1 7 , B.E. 2535 (1992) Dear Dr. Tilson, Further to your meeting with Dr. Schwan.n Tunbikorn , Head of Research at the Wildlife Conservation Division , I am happy to confirm that the Royal Forest Department very much like to host a workshop in Thailand next year to prepare a set of national guidelines governing the rehabitation of captive gibbons and their possible re-introduction to the wild or semi-wild state. We are keen that this issue be addressed and properly placed in the context of a national conservation strategy before any attempts are made to release captive animals to the wild without due thought and preparation. We are also keen to explore ways in which the situation for wild animals held in captivity in Tr~land , whether in public zoos and nature education centres or private hands , can be improved. We are aware that our record to date is not without fault and we appreciate your interest in lending a hand. We would be grateful if you could arrange funding for such a workshop. Our own budget is already over-stretched. We would like to invite all interested parties to join from both the government and non-government sectors. We look forward to hearing from you. Yours Sincerely, Dr. Ronald L. Tilson Dt:c~-~~;iy DJrPctor-Ge-ne-ra; Director of Conservation, Education and Research Minnesota Zoo, Apple Valley, Minnesota 55124 INNESOTA Z 0 13000 Zoo Boulevard, Apple Valley, MN 55124 612.431.9200 Khun Thammarong Prakobboon 17 March 1992 Deputy Director-General Royal Forest Department Paholyothin Road, J atujak