Maine is home to the last wild Atlantic salmon populations in the U.S., but a new push to protect the fish at the state level is unlikely to land them on the endangered list.

Atlantic salmon once teemed in U.S. rivers, but now return from the sea to only a handful of rivers in eastern and central Maine. The fish are protected at the federal level under the U.S. Endangered Species Act, but a coalition of environmental groups and scientists said the fish could be afforded more protections if they were added to Maine’s own list of endangered and threatened species.

State law allows Maine Department of Marine Resources Commissioner Patrick Keliher to make that recommendation, but his office told The Associated Press he does not intend to do it. The department has done extensive work to conserve and restore the fish, and the commissioner “does not believe a listing at the state level would afford additional conservation benefits or protections,” said Jeff Nichols, a department spokesperson.

The environmentalists who want to see the fish on the state list said they’re going to keep pushing for it and other protections. Adding the fish to the state endangered list would mean conservation of salmon would be treated as a bigger concern in state permitting processes, said John Burrows, executive director for U.S. operations for the Atlantic Salmon Federation.

“The state of Maine and a handful of our rivers are the only places in the country that still have wild Atlantic salmon,” Burrows said. “It’s something that should happen, and should have happened.”

Atlantic salmon have disappeared from U.S. rivers because of damming, pollution and others environmental challenges, and they also face the looming threat of climate change. Nevertheless, there have been some positive signs in Maine rivers in recent years.

More than 1,400 salmon returned to the Penobscot River in 2020. That was the highest number since 2011, the Maine marine resources department found. The Penobscot is the most productive river for the salmon. It averaged only about 700 fish per year from 2012 to 2019.

Attempts to repopulate Atlantic salmon in other states have stalled. The federal government ended an attempt to restore Atlantic salmon in the Connecticut River basin in 2012 after several decades because of lack of success.

Getting the fish listed on the Maine endangered list has long been a goal of many environmental groups. The Maine Endangered Species Act includes 26 endangered species and 25 threatened ones. The list includes two fish: the endangered redfin pickerel and the threatened swamp darter.

The list is designed to provide state-level protection to jeopardized species and is a complement to the U.S. Endangered Species Act. A few species, including the piping plover, are listed on both.

Environmentalists supported a bill in the Maine Legislature earlier this year that would have required the marine resources commissioner to recommend a state listing for any species that is federally listed as endangered or threatened. The proposal died in committee in June.

A group of 19 organizations and 10 scientists and conservationists sent a letter to the state that said Maine is one of the few states that doesn’t mandate or recommend state-level listing of federally listed species. Dwayne Shaw, director of the Downeast Salmon Federation, said wildlife advocates will continue pushing for salmon protections.

“There would be great symbolism in this, but there would also be direct implications, positive implications for the species,” Shaw said.