HELENA, Mont. — Federal wildlife officials are proposing to strip endangered species protections from the gray wolf populations in the Lower 48 states, citing significant increases in their numbers across much of the nation.

The decision, announced on Wednesday by David Bernhardt, the acting secretary of the Interior Department, is likely to set off another round of court battles. Conservationists and biologists contend that some areas of the country, like the Adirondacks in New York and the southern Rocky Mountains, could be suitable habitats but wolf populations in those regions are vulnerable and still need protection to recover.

The gray wolf populations had dwindled to about 1,000 in the lower 48 states when they received protection under the Endangered Species Act in 1975. But since their reintroduction to various regions, mostly in the West, the wolves’ numbers have rebounded to about 5,000.

“Recovery of the gray wolf under the Endangered Species Act (ESA) is one of our nation’s great conservation successes,” the United States Fish and Wildlife Service said in a statement, “with the wolf joining other cherished species, such as the bald eagle, that have been brought back from the brink with the help of the ESA.”

As their numbers grew, ranchers have had to contend with wolves’ appetite for cattle and sheep. And while hunters contend that wolves have decimated elk and other game in certain regions, conservationists point to the benefits that the predators provide: keeping deer, elk and other species in check and therefore reducing their effect on vegetation.

The National Cattlemen’s Beef Association applauded the plan for delisting, and said it should have happened sooner. In a joint statement, Jennifer Houston, president of the group, and Bob Skinner, president of the Public Lands Council, contended that the Endangered Species Act “rarely functions as Congress intended.”

“Radical environmental activists use an endless cycle of lawsuits and procedural tricks,” to thwart delisting, they said.

The animals are prolific breeders and while they are hunted and trapped, they are managed by state wildlife agencies that limit how many can be killed.

Losing the endangered status protection concerns conservationists, who worry that new populations won’t become established in areas where the wolf is present, but not yet stable.

“Stripping protections from wolves now would halt further recovery from places where wolves once lived and could live again,” said Collette Adkins, carnivore conservation director for the Center for Biological Diversity. “Without protections in the Adirondacks or Maine or the southern Rockies we don’t have any hope of recovery.”

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