The tiger exchange is part of the Association of Zoos and Aquariums' (AZA) Special Survival Plan (SSP). The mission of the AZA SSP Program is to help ensure the survival of selected wildlife species. The program started in 1981 as a cooperative population management and conversation program for selected species in zoos and aquariums in North America.
Each SSP manag es the breeding of a species in order to maintain a healthy and self-sustaining population that is both genetically diverse and demographically stable. Most of the species in the program are endangered or threatened in the wild.