ORONO, Maine — Commercial fishing activity nearly 2,000 miles away is worrying Maine conservationists working to restore Atlantic salmon to the Penobscot River.

At a recent summit, Greenland awarded itself an annual salmon quota of 45 metric tons for the next three years. Officials there say the new quota is considerably less than the previous harvest of 57 tons, and that reducing it further would have devastating economic consequences for fishing communities around the huge, sparsely populated island.

‘‘The fact is that we’re reducing the fishery a lot,’’ Katrine Kaergard of Greenland’s ministry of fisheries told Maine Public Radio.

But some US officials believe the salmon quota should be zero. They worry about the effect on vulnerable Atlantic salmon populations in the United States.

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