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12-14-2014, 08:58 AM( This post was last modified: 12-14-2014, 08:58 AM by GuateGojira )
Well, there are some difference between the Sumatran and the Javanese prey species.
In Sumatra, most of the prey is small <50 kg, and the only large prey available like Sambar and tapir, live in very low densities, caused by the human intervention trough hunting and forest destruction.
Java had a relative larger prey base, there is also pig and deer, but it also have the huge Banteng and there are several cases of tigers directly hunting this large bovid. The problem was when humans destroyed the habitat and the impact was stronger than that in Sumatra. Some scientists think that is was the depletion of the prey, and not only the hunt, which killed the Javanese tigers.
Finally, and to don't going to deep, the Javanese tiger had a larger prey array in comparison with the Sumatran tigers. Probably this influenced in the form and size of this two tiger groups.