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Spatial point pattern analysis of the Sumatran tiger (Panthera tigris sumatrae) poaching cases in and around Kerinci Seblat National Park, Sumatra

Farid Rifaie,J. Sugardjito,Y. Fitriana

Published 2016 in Unknown venue

ABSTRACT

Rifaie F, Sugardjito J, Fitriana YS. 2015.Spatial point pattern analysis of the Sumatran tiger (Panthera tigris sumatrae) poaching cases in and around Kerinci Seblat National Park, Sumatra. Biodiversitas 16: 311-319.Wild Sumatran tigers are in a critical state with around 250 adult tigers remain in their habitat in Sumatra Island. Despite the fact that this subspecies is an elusive animal with very wide home range, Sumatran tigers are facing two serious threats, the depletion of its habitats and preys in one side and the increase of tiger hunt for illegal wildlife market. Improving the capacity and effectiveness of law enforcement in reducing poaching of tigers is an immediate priority protecting the remaining wild populations in their habitat. Enforcement monitoring was established under the Tiger conservation program. During their patrols, the anti-poaching team recorded various data including poaching incidents. We analyzed secondary data of Sumatran tiger poaching cases around Kerinci Seblat National Park that have been documented from 2000 to 2012. Georeferencing process was performed to transform locality data of 87 poaching cases into geographic position. The Nearest Neighbor (NN) analysis suggested a strong clustering pattern with the observed mean distance was 4.9 km, much lower than the expected mean distance (10.9 km).Similarly, The Ripley's K analysis also showed the aggregation of the points along the observed distances. On the other hand, about 35.6% of points were located outside the standard deviational ellipse. The pattern indicated that poaching incidents were spread in all corner of the region but excessive cases were observed in the center of the park.

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