Isle Royale Winter Study: Good Year for Wolves, Tough One for Moose

For the first time in two years, researchers were able to conduct the rigorous fieldwork they’re accustomed to on Isle Royale. In addition to population estimates, updates about the lives of wolves and moose are included in the 2021-2022 Winter Study published by Sarah Hoy, John Vucetich and Rolf Peterson (CFRES).
Researchers observed two healthy wolf packs gaining a foothold on the island, with at least five litters of pups born since the translocation of gray wolves in 2018-19. They also estimated a 28% decline in a moose population experiencing more vigorous predation, pest challenges and food scarcity. Wolf kills accounted for 8.7% of the moose mortalities. Other contributing factors include blood-sucking winter ticks and a spruce budworm infestation weakening the island’s population of balsam fir.
Read more and access the 2021-22 report at Michigan Tech News.