Robuta

https://www.sciencedaily.com/releases/2017/04/170426141724.htm
The flow of genes between Bengal tigers in two reserves of the Terai Arc Landscape in western Himalayan foothills is too low, according to a study.
gene flowbengal tigerin thelimitedtwo
https://www.upworthy.com/tiger-populations-increase-40-percent
Over the past seven years, tiger numbers have increased more than 40 percent across Asia.
tiger populationsin asiaexponentiallyincreasenepal