While I've no reason to question the results, the size of the study over three years makes any conclusion highly suspect, and relevant only to the immediate area.
The cumulative three-year record shows coyotes have preyed on seven adult deer in the study, wolves on three and bear and bobcat one each.Similarly, over the three years coyotes have preyed on 22 fawns, outpacing bobcats (12 fawns), bears (four) and wolves (four). One fawn was killed by a bald eagle.
So, what are the wolves eating?