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Journal : Journal of Tropical Biodiversity

The Response of Orangutans to a Total Solar Eclipse Event Didik Prasetyo; Sri Suci Utami-Atmoko; Deni Kurniawan; Erin Vogel
Journal of Tropical Biodiversity Vol 1 No 2 (2021): April 2021
Publisher : Universitas Nasional Jakarta

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Abstract

A complete solar eclipse is a rare event, and we know very little about how other species, including our closest living relatives the primates, react to these events. We observed orangutans on the island of Borneo, Indonesia during a rare astronomical event of a total solar eclipse. Captive orangutans in Nyarumenteng rehabilitation center, Central Kalimantan were observed to document their reaction to this unexpected environmental event. Based on this study that was conducted in 2016, the dramatical behavior demonstrated in the time of the total solar eclipse, and the general response differed between before and after the event. During the total solar eclipse, flanged males tended to increase their social behavior compared to the unflanged males. These findings indicate that the total solar eclipse resulted in an environmental stressor for these captive orangutans.
Diversity and Threat Hunting of the Birds in the Labian-Leboyan Corridor West Kalimantan Gusti Wicaksono; Mohamad Arif Rifqi; Imran S.L Tobing; Sri Suci Utami Atmoko
Journal of Tropical Biodiversity Vol 1 No 3 (2021): August 2021
Publisher : Universitas Nasional Jakarta

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Abstract

Labian-Leboyan corridor is both lowland and peat swamp forested areas pointed in a strategic location between Betung Kerihun and Danau Sentarum National Park. The area is mostly managed by communities and essential areas for birds. This study is conducted to understand the diversity of birds and the threats in both peat swamp and lowland habitat using the 12 line transects method and direct observation to hunter's place. The study results are 173 bird species identified, 131 species associated with peat swamp forest, and 104 species associated with lowland forest. 108 individuals from 29 species of birds were captured for trade and meat in both habitats. Immediate conservation action is needed to support sustainable resources management of biodiversity, especially birds in the area.