Extra wild Atlantic salmon have been present in U.S. rivers than any time up to now decade 

The final wild Atlantic salmon that return to U.S. rivers have had their best 12 months in additional than a decade, elevating hopes they might be weathering myriad ecological threats.

Officers counted greater than 1,500 of the salmon within the Penobscot River, which is residence to the nation’s largest run of Atlantic salmon, Maine state knowledge present. That’s the most since 2011 when researchers counted about 2,900 of them.

The salmon had been as soon as considerable in American rivers, however elements equivalent to overfishing, lack of habitat and air pollution decreased their populations to solely a handful of rivers in Maine. The fish are protected by the Endangered Species Act, and typically just a few hundred of them return from the ocean to the rivers in a 12 months.