This report provided the first synthesis of NIS known to be in Alaska, resulting from an extensive literature review and field-based surveys. The study concluded that several NIS are present in the segregated ballast water released by oil tankers into Prince William Sound. The Smithsonian Environmental Research Center identified a total of 15 NIS in Prince William Sound. These NIS may have been transferred to Prince William Sound in the ballast water of oil tankers, on the bottoms of vessel hulls or sea chests, or by other means.
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NIS