Maine’s premier gathering of commercial fishermen is kicking off in Rockport. The 38th annual Maine Fishermen’s Forum gets under way Thursday and runs through Saturday at the Samoset Resort. The event is the largest of its kind in New England, bringing together fishermen, fishery managers, scientists, politicians, seafood dealers and others with an interest in commercial fishing. Between 2,500 and 3,500 people typically attend. The forum features seminars, a trade show, a benefit auction and a dinner and dance. Gov. Paul LePage is scheduled to make an appearance on Friday.