TripAdvisor, the popular travel review website, and its ticket sales company, Viator, said Tuesday they no longer will sell tickets to hundreds of tourist attractions that are widely accepted as cruel to wild animals, reversing a policy under which the companies had resisted considering the welfare of animals when promoting trips.

The move to stop selling tickets to elephant rides, swim-with-dolphin experiences, and attractions that allow visitors to pet tigers and other exotic animals comes after a one-and-a-half-year protest campaign by the London-based animal welfare group World Animal Protection and reporting by National Geographic’s Wildlife Watch, which drew attention to TripAdvisor’s continued promotion of such attractions at a time when dozens of other tour and travel companies were moving