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

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FARID RIFAIE
JITO SUGARDJITO
YULI SULISTYA FITRIANA

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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