FILE-In this 2001 file photo released by Michigan Technological University, Moose are shown on Isle Royale, Mich. Scientists on Wednesday, April 30, 2014 say the slumping wolf population at Isle ... more 
FILE-In this 2001 file photo released by Michigan Technological University, Moose are shown on Isle Royale, Mich. Scientists on Wednesday, April 30, 2014 say the slumping wolf population at Isle Royale National Park is leading to a boom in the number of moose on the Lake Superior island chain. The development reflects what researchers say are dim prospects for the wolves' long-term survival and raises the possibility that a runaway moose population will damage the island's vegetation. (AP Photo/Michigan Tech University, Rolf Peterson, file) less 
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Associated Press | Photo By Michigan Tech University, Rolf Peterson, file
Wed, Apr 30, 2014 5:36 PM EDT