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With Help, Tigers Clawing Back in Southeast Asia

Eight-year study shows tiger population recovering in Thai sanctuary, the only location in Southeast Asia where tigers are confirmed to be increasing in number

90 tigers identified

Rigorous study is first ever of long-term tiger population dynamics in SE Asia

Link to study: http://onlinelibrary.wiley.com/doi/10.1111/cobi.12655/full

Photo Credit: Government of Thailand/WCS Thailand

(New York) – February 18, 2016 – A new study by a team of Thai and international scientists finds that a depleted tiger population in Thailand is rebounding thanks to enhanced protection measures.  This is the only site in Southeast Asia where tigers are confirmed to be increasing in population. It is also the first-ever long-term study of tiger population dynamics in Southeast Asia.

Moreover, the scientists feel even better days lay ahead for this population of the iconic carnivores.

The Government of Thailand in collaboration with WCS (Wildlife Conservation Society) established an intensive patrol system in in Huai Kha Khaeng Wildlife Sanctuary (HKK) in 2006 to curb poaching of tigers and their prey, and to recover what is possibly the largest remaining “source” population of wild tigers in mainland Southeast Asia.

Monitoring of the population from 2005-2012 identified 90 individual tigers and an improvement in tiger survival and recruitment over time.

“The protection effort is paying off as the years have progressed, as indicated by the increase in recruitment, and we expect the tiger population to increase even more rapidly in the years to come,” said Somphot Duangchantrasiri, the lead author of the study.”

To monitor the tigers, the scientists employed rigorous, annually repeated camera trap surveys (where tigers are photographed and individually identified from their stripe patterns) combined with advanced statistical models.

“This collaboration between WCS and the Thai government used the most up-to-date methodologies for counting tigers,” said Dr. Ullas Karanth, a senior scientist with WCS and one of the authors of the study. “It’s gratifying to see such rigorous science being used to inform critical conservation management decisions.”

Analyses of the tigers’ long-term photo-capture histories and calculations of tiger abundances and densities, annual rates of survival, recruitment and other information provided scientists with direct, comprehensive measures of the dynamics of the wild tiger population in HKK.

Joe Walston, WCS Vice President of Field Conservation said, “This is an outstanding conservation success coming from an area where wildlife has been struggling for some time. The result to date is reflective of the commitment made by the Thai government and its partners to Thailand’s natural heritage. And despite the considerable gains made already, we believe the future looks even brighter.”

The authors note that 10-15 years of intensive protection of source sites is required before prey populations attain optimal densities necessary to support higher tiger numbers.

The study, “Dynamics of a low-density tiger population in Southeast Asia in the context of improved law enforcement,” appears in the online version of the journal Conservation Biology. Authors of the study include: Somphot Duangchantrasiri, Saksit Simcharoen, Soontorn Chaiwattana and, Sompoch Maneerat of the Department of National Parks, Wildlife and Plant Conservation, Bangkok, Thailand; Mayuree Umponjan of Wildlife Conservation Society(WCS), Thailand Program, Nonthaburi, Thailand; Anak Pattanavibool of WCS Thailand Program, and Department of Conservation, Faculty of Forestry, Kasetsart University, Bangkok, Thailand; Devcharan Jathanna and Arjun Srivathsa of the Centre for Wildlife Studies, Bengaluru, India; N. Samba Kumar of the Centre for Wildlife Studies and WCS, India Program, Bengaluru, India; and K. Ullas Karanth of the WCS, Global Conservation Program, Bronx, New York, USA.

This work has been supported by the Liz Claiborne and Art Ortenberg Foundation, The U.S. Fish and Wildlife Service, U.S. Department of State, and Petroleum Authority of Thailand: Production & Exploration (PTT-EP). We also acknowledge support from the Department of National Parks, Wildlife and Plant Conservation (Thailand), The Royal Thai Police and Kasetsart University-Thailand.

WCS (Wildlife Conservation Society)

MISSION: WCS saves wildlife and wild places worldwide through science, conservation action, education, and inspiring people to value nature. To achieve our mission, WCS, based at the Bronx Zoo, harnesses the power of its Global Conservation Program in nearly 60 nations and in all the world’s oceans and its five wildlife parks in New York City, visited by 4 million people annually. WCS combines its expertise in the field, zoos, and aquarium to achieve its conservation mission. Visit: newsroom.wcs.org Follow: @WCSNewsroom. For more information: 347-840-1242