Estimating the population structure of Javan rhinos (Rhinoceros sondaicus) in Ujung Kulon National Park using the mark- recapture method based on video and camera trap identification

A population estimate of 32 Javan rhinos (Rhinoceros sondaicus), ranging from 29 to 47 individuals, was derived for Ujung Kulon National Park using the mark-recapture method based on video and camera trap identifications. The study, conducted between April 2008 and September 2009, applied the CAPTURE software to select the best-fit estimator (M(th)), yielding a 95% confidence interval. Visual identification further revealed a male-biased sex ratio of approximately 3:2 (males to females) and indicated a slow annual population growth rate of about 1%. The findings highlight the park's role as a critical stronghold for this critically endangered species, emphasizing the need for targeted conservation efforts to address demographic imbalances and support sustainable growth.

Hariyadi, A., Priambudi, A., Setiawan, R., Daryan, D., Yayus, A., & Purnama, H. (2011). Estimating the population structure of Javan rhinos (Rhinoceros sondaicus) in Ujung Kulon National Park using the mark- recapture method based on video and camera trap identification. Pachyderm, 49, 90–99. https://doi.org/10.69649/pachyderm.v49i.254