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  • Dave Harmon, PW editor

Study of Isle Royale NP wolves theorizes that large ancestral population led to current genetic woes

Isle Royale is 200 square miles of land in the watery expanse of Lake Superior. One cold winter 70 years ago, wolves came over an ice bridge and settled into a largely isolated island existence. Unfortunately, island life has not been good for them.


By 2016, the number of wolves on Isle Royale declined from a peak of 50 to just two, a male and a female. As a result of inbreeding, they were half-siblings as well as father and daughter. They had a pup together that lived less than a year. Even before that, scientists were finding wolves on Isle Royale with crooked spines and extra ribs.


https://www.theatlantic.com/science/archive/2019/07/isle-royale-wolves-and-risks-extinction/593020/

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