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Link to original content: http://www.ncbi.nlm.nih.gov/pubmed/22096582
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. 2011;6(11):e27491.
doi: 10.1371/journal.pone.0027491. Epub 2011 Nov 11.

Quantifying killing of orangutans and human-orangutan conflict in Kalimantan, Indonesia

Erik Meijaard  1 , Damayanti Buchori, Yokyok Hadiprakarsa, Sri Suci Utami-Atmoko, Anton Nurcahyo, Albertus Tjiu, Didik Prasetyo, Nardiyono, Lenny Christie, Marc Ancrenaz, Firman Abadi, I Nyoman Gede Antoni, Dedy Armayadi, Adi Dinato, Ella, Pajar Gumelar, Tito P Indrawan, Kussaritano, Cecep Munajat, C Wawan Puji Priyono, Yadi Purwanto, Dewi Puspitasari, M Syukur Wahyu Putra, Abdi Rahmat, Harri Ramadani, Jim Sammy, Dedi Siswanto, Muhammad Syamsuri, Noviar Andayani, Huanhuan Wu, Jessie Anne Wells, Kerrie Mengersen
Affiliations

Quantifying killing of orangutans and human-orangutan conflict in Kalimantan, Indonesia

Erik Meijaard et al. PLoS One. 2011.

Erratum in

  • PLoS One. 2012;7(3). doi: 10.1371/annotation/e6ef5bb6-449c-458f-8e90-2629d91e1767
  • PLoS One. 2012;7(3). doi:10.1371/annotation/7b65cf64-9fd5-4b95-baf2-8824c4785ab1

Abstract

Human-orangutan conflict and hunting are thought to pose a serious threat to orangutan existence in Kalimantan, the Indonesian part of Borneo. No data existed prior to the present study to substantiate these threats. We investigated the rates, spatial distribution and causes of conflict and hunting through an interview-based survey in the orangutan's range in Kalimantan, Indonesia. Between April 2008 and September 2009, we interviewed 6983 respondents in 687 villages to obtain socio-economic information, assess knowledge of local wildlife in general and orangutan encounters specifically, and to query respondents about their knowledge on orangutan conflicts and killing, and relevant laws. This survey revealed estimated killing rates of between 750 and 1800 animals killed in the last year, and between 1950 and 3100 animals killed per year on average within the lifetime of the survey respondents. These killing rates are higher than previously thought and are high enough to pose a serious threat to the continued existence of orangutans in Kalimantan. Importantly, the study contributes to our understanding of the spatial variation in threats, and the underlying causes of those threats, which can be used to facilitate the development of targeted conservation management.

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Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Figure 1
Figure 1. Potential distribution area of orangutan in Central Kalimantan (yellow), West Kalimantan (purple) and East Kalimantan (green), and the village area boundaries within these regions.
Figure 2
Figure 2. Crop raiding intensity in different villages across Kalimantan.
High  =  reported conflict frequency every week; Medium  =  every month; Low  =  once a year or less frequently.
Figure 3
Figure 3. Reported orangutan killing in 2008–2009 in three provinces of Kalimantan.
See this image and copyright information in PMC

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