What cause is suspected for the massive population drop in the Aleutian Islands of Alaska, from potentially 100,000 to around 6,000?

Answer

Increased predation, primarily by orcas.

A massive population drop in the sparsely populated Aleutian Islands has been suspected to be caused by an increase in predation, primarily by orcas, although direct proof remains elusive.

What cause is suspected for the massive population drop in the Aleutian Islands of Alaska, from potentially 100,000 to around 6,000?
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