Relocating tigers to bolster genetically isolated, dwindling populations in fragmented reserves has shown some early success, but conservationists caution that translocation alone cannot substitute for the long-term work of maintaining and restoring wildlife corridors that allow tigers to move and breed naturally between reserves, since isolated populations will otherwise require repeated, resource-intensive interventions indefinitely.

With reference to the above passage, the following assumptions have been made:

1. Translocation of tigers has shown some early success in bolstering isolated populations.

2. Wildlife corridors become unnecessary once a translocation programme is complete.

Which of the above assumptions is/are valid?