Harvesting Methuselah's clams - is the geoduck fishery sustainable, or just apparently so? / J.M. (Lobo) Orensanz, Ray Hilborn and Anna M. Parma. : Fs70-1/2000-175E-PDF

Geoducks are very large and very long-lived bivalves, with potential life-spans well beyond 100 years. Such long life-spans should be expected to confer great stability to these populations. Information about the ecology and dynamics of geoduck populations in Washington State and British Columbia is re-examined, and the implications for stock assessment and management is explored. Strengths and shortcomings of the two management systems are identified, and urgently needed information is highlighted. The analyses suggest a long-term trend of declining recruitment over a large spatial scale, so that recent recruitment could be 40-50% of that during the 1930's. Recommendations are provided to further investigate this apparent phenomenon and the potential role played by fishing activities.

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