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NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance.

This study was supported by Contract/Grant No. C8074080026 between the National Academy of Sciences and the National Park Service. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the organizations or agencies that provided support for the project.

International Standard Book Number-13: 978-0-309-14695-1

International Standard Book Number-10: 0-309-14695-X

Front Cover: Image of the Northern quahog, Mercenaria mercenaria, was provided by the National Oceanic and Atmospheric Administration.

Back Cover: Images from top right, counterclockwise: longlines in Samish Bay, Washington; Herrold Oyster Company workers picking oysters in Willapa Bay, Washington; Kumamoto oysters; eelgrass and longlines in Willapa Bay, Washington (all of these were used with permission from Bill Dewey, Taylor Shellfish Company); and mussel lines (used with permission from Fisheries and Oceans Canada).

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