Are Isle Royale's Wolves Chasing Extinction?

摘要: For 40 years without fail, a group of ecologists from Michigan Technological University have listened for high-pitched yips that signal new generation pups joining the storied wolf population on Isle Royale. first time last summer, heard no and failed to spot during official aerial count in January 2013. The lack reproduction means 2012 will likely go down as beginning end Royale9s wolves. One school thought has maintained this chance natural experiment should run its course even if extinction, followed by transfusion fresh wolves control moose rugged island. But some researchers argue study9s value is so great current integral island they warrant "genetic rescue," importing other wild soon.