BOSTON – The federal Small Business Administration has decided to provide federal disaster aid to Massachusetts fishermen hard hit by reductions in catch limits and groundfish stocks.

U.S. Sen. Edward Markey said Friday that the aid will help fishermen keep their businesses afloat as they adjust to changing conditions that threaten commercial fishing.

In September, Gov. Deval Patrick officially certified that Massachusetts fishermen who chase bottom-dwelling groundfish had suffered “substantial economic injury.”

The aid also will help those in two New Hampshire counties.