(Portland, OR)  --  The Coast Guard is suspending its search for a missing 19-year-old man who disappeared while duck hunting near Astoria.  The Coast Guard says the search for Riley Salisbury is now being considered a recovery effort.  Salisbury went missing Saturday while hunting with his father near Russian Island.  A 19-hour search for him has failed to turn up any clues.  Deputies believe he likely succumbed to hypothermia.