Kolkata: Tiger expert Valmik Thapar has expressed concern on relocating the Royal Bengal tigers in the Sunderbans mangrove of West Bengal and "dumping" them elsewhere in the forest, a process, he said, traumatises the big cats.

"The problem in Sunderbans which needs to be addressed by wildlife scientists is that tigers get caught and then taken in boats in the forest department and dumped back in the forests. You should be very careful where you dump tigers," Thapar said during a special audio-video (AV) presentation at the Kolkata Literary Meet here Monday.