July 9 (Reuters) - Orca Exploration Group Inc ORCb.V :
* ORCA EXPLORATION ANNOUNCES MANAGEMENT CHANGES
* ORCA EXPLORATION GROUP INC - W DAVID LYONS HAS DECIDED TO STEP BACK AS CEO FOR PERSONAL HEALTH REASONS
* ORCA EXPLORATION GROUP INC - W DAVID LYONS WILL CONTINUE ON IN HIS CAPACITY AS CHAIR OF BOARD
* ORCA EXPLORATION GROUP INC - ALAN KNOWLES HAS AGREED TO ACT AS INTERIM CEO