Surveys near the Pribilof Islands in the Bering Sea indicated a substantial increase in the local abundance of fin whales between 1975–1978 and 1987–1989.
Os estudos preto das illas Pribilof no mar de Bering mostraron un aumento substancial da poboación local de rorcuais comúns entre 1975–1978 e 1987-1989.