Sumatran tiger population recovering: study

Results of the camera-trap study showed a Sumatran tiger population density increase to 2.8 tigers per 100 square kilometres in 2015 from 1.6 tigers in 2002. Furthermore, the proportion of male and female tigers recently recorded was 1:3. “This ratio indicates that the tiger population in the National Park is in a healthy condition and breeding opportunity exists for many females within the areas we surveyed,” said Wulan Pusparini, a Species Conservation Specialist at WCS.

“Our study not only looks at population condition, but also used the photographs to assess the threat of people illegally entering the park,” said Pusparini. “This increasing population trend in Sumatran tigers is a dream come true for all conservationists in Indonesia,” said Noviar Andayani, WCS-Indonesia Country Director.

“I appreciate the work of the park authority and our field team for their efforts in not only protecting tigers and their habitat, but also collecting robust research data to demonstrate this trend and ensure that in the coming years, the UNESCO Tropical Heritage of Sumatra can be removed from the ‘in danger list’,” said Andayani.

Sumatran tigers face many challenges to their continued existence in the wild, where they require a home range of 25,000 hectares. These include being poached for their skin, bones and other body parts, involvement in conflict with people, a depleted prey base, and habitat loss.

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