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This is great news as I honestly believed Sumatran tigers had little hope of recovery and would eventually go the way of the Bali and Javan tiger.With continued public education, protection zones and government concern there may be some future for these critically endangered animals. Splendid news.
The study set 123 PantheraCam camera traps over a 1,000 km2forest block located in a protection zone specially designated by the Bukit Barisan Selatan National Park Authority to improve park protection and aid in the recovery of flagship species.
Results of the camera-trap study showed a Sumatran tiger population density increase to 2.8 tigers/100 km2 (2015) from 1.6 tigers/100 km2 (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 lead author, Wulan Pusparini, WCS Species Conservation Specialist.
https://www.sciencedaily.com/releases/2017/10/171023122930.htm
