Executive Director of the Foundation for Sustainable Ecosystem (YEL) Ian Singleton, Sumatran orangutan number continues to shrink from year to year due to land use changes. In fact, orangutans in Tripa Swamp Aceh region thought to be extinct this year.

Executive Director of the Foundation for Sustainable Ecosystem (YEL) Ian Singleton, Sumatran orangutan number continues to shrink from year to year due to land use changes. In fact, orangutans in Tripa Swamp Aceh region thought to be extinct this year.

"If the government does not punish perpetrators of land conversion and deterred them, Orangutan aka extinct," he said in Medan on Thursday (05/09/2013).

Currently the number of orangutans in Tripa Swamp live 300an tail. Whereas in 1990 the number was less than 3,000 at Tripa swamp land is 61 803 hectares.

Tripa swamp is an area that is included in the Leuser Ecosystem which is used as a strategic area in environmental conservation.

Currently, land Rawa Tripa lived about 20,000 acres.

According to Ian, Rawa Tripa peat converted into oil palm plantations of oil palm companies.

The companies are PT Gelora Sawita Makmur, PT Kallista Alam, PT Patriot II Guna Sakti Abadi, PT Shining Abadi and PT Astra Agro Lestari.

Over this function practically narrowed orangutan habitat. In general, says Ian, population 6,600 orangutans live Sumtera tail.

As many as 85 percent are in the Leuser Ecosystem. The rest are in Dairi, Tapanuli and Mandailing Natal. Twenty years ago, about 13,000 orangutans tail number.