Fishery regulators are holding a public hearing in Portland to discuss the future of New England's closed Maine shrimp fishery.The shrimp fishery closed in 2013 and has yet to reopen because of concerns about shrimp population levels.Fishermen, biologists team up to study dwindling shrimp populationThe Atlantic States Marine Fisheries Commission is collecting feedback from the public about establishing a limited fishery for the shrimp "for use in the future if and when the stock recovers and the fishery can be re-opened."The Portland hearing is scheduled for 6 p.m. Monday at the Casco Bay Ferry Terminal Conference Room.Fishermen from Maine, New Hampshire and Massachusetts harvested Maine shrimp prior to the collapse of the fishery in 2013.Regulators held prior public hearings about shrimp season in Rockport, Maine, Portsmouth, New Hampshire, and Gloucester, Massachusetts.