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All Journal HAYATI Journal of Biosciences
Vallen Sakti Maulana
Primatology Study Program, Graduate School, IPB University, Kampus IPB Dramaga, Bogor, Indonesia
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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Population Estimate of Long-Tailed Macaques (Macaca fascicularis) on Tinjil Island Dyah Perwitasari-Farajallah; Entang Iskandar; Hana Intishar Sawitri; Tommy Langgeng Abimanyu; Vallen Sakti Maulana; Annisa Devi Rachmawati; Indra Purnama; Huda S. Darusman
HAYATI Journal of Biosciences Vol. 30 No. 2 (2023): March 2023
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.30.2.193-197

Abstract

Tinjil Island was established as a Natural Habitat Breeding Facility for long-tailed macaques (Macaca fascicularis) in 1997. Between February 1998 and January 2007, 603 (61 males and 542 females) simian retrovirus (SRV) free long-tailed macaques were introduced to the island on the south coast of West Java and function as a primate resource and conservation program. To date, 3256 progenies have been harvested and used as the animal model. Therefore, it is necessary to survey the current population of the long-tailed macaques to evaluate whether the population is still under the island’s carrying capacity. This research aims to identify the population estimate of long-tailed macaques currently occupying the island. The observation was conducted in July 2021 using line transect sampling starting from 07.00 AM and 01.00 PM. Twelve observations were conducted during the study using CD and ES transects. CD (Chuck Darsono) and ES (Emil Salim) are the two longest trails on the island and represent the names of the people who initiated the captive breeding of Tinjil Island. The estimated group density of the long-tailed macaques on Tinjil Island is 13.46 groups/km2, while the estimated population density is 111.04 individuals/km2. The population estimated on the island is 627.38±23.53 individuals. The number indicates that the population is still under carrying capacity.
Co-Authors Annisa Devi Rachmawati DYAH PERWITASARI -FARAJALLAH Entang Iskandar Hana Intishar Sawitri Huda S. Darusman Indra Purnama Tommy Langgeng Abimanyu