FREDERICTON, New Brunswick — The union representing lobster fishermen in New Brunswick said on Saturday that it has reached an agreement with the provincial government and fish processing plants after fishermen blockaded several Canadian plants, demanding that they not accept cheaper lobsters from Maine.

Christian Brun of the The Maritime Fishermen’s Union said a tentative deal was reached on Friday night and approved by most of the fishermen early on Saturday morning.

Tensions over lobster prices bubbled over last week, when fishermen in the province held demonstrations in Cap-Pele and Shediac and trucks were blocked from delivering Maine lobsters to processing plants. Canadian lobstermen say the low price of Maine lobsters is driving down prices in Canada and stealing their livelihood.

By Wednesday, every lobster processing plant in New Brunswick had shut down operations.