 However, they only presented data through 1993, so the recovery that started in the early 1990s was not clearly evident.In 1999, two conservation groups, GreenWorld, based in Cambridge, Massachusetts, and the Center for Marine Conservation, based in Washington, DC, petitioned the National Marine Fisheries Service (NMFS) to have the barndoor skate listed under the Endangered Species Act.After a 12-month study, the NMFS announced in 2002 that listing the species as endangered or threatened was not warranted.