Vice Pres. Al Gore will deliver good news to New England fishers today when he announces a $5 million federal disaster-relief program. The aid program will give the operators of 750 small fishing boats in the Gulf of Maine up to $1,500 for each day that fishing grounds were closed by regulators this past spring, money they are expected to share with their crews. In return for each day of aid, the fishers must agree to spend a day helping government researchers by tagging and releasing cod or recording trolling net catches. Gore will also announce a new federal task force on ocean conservation today.