000	00000nam 2200000za 4500
001	9.806398
003	CaOODSP
005	20221107135901
007	cr |||||||||||
008	150406s2000    oncdb   ob   f000 0 eng d
040	|aCaOODSP|beng
041	|aeng|bfre
043	|an-cn---
086	1 |aFs70-1/2000-175E-PDF
100	1 |aOrensanz, J. M.
245	10|aHarvesting Methuselah's clams - is the geoduck fishery sustainable, or just apparently so? |h[electronic resource] / |cJ.M. (Lobo) Orensanz, Ray Hilborn and Anna M. Parma.
260	|aOttawa : |bFisheries and Oceans Canada, |c2000.
300	|a68 p. : |bfig., graphs, maps, tables.
490	1 |aCanadian Stock Assessment Secretariat research document, |x1480-4883 ; |v2000/175
504	|aIncludes bibliographic references (p. 31-34).
520	|aGeoducks 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.
692	07|2gccst|aFisheries resources
692	07|2gccst|aMolluscs
692	07|2gccst|aFishing area
692	07|2gccst|aFisheries management
700	1 |aHilborn, Ray.
700	1 |aParma, Ana M.,|d1955-
710	1 |aCanada. |bDepartment of Fisheries and Oceans.
710	2 |aCanada.|bCanadian Stock Assessment Secretariat.
830	#0|aCanadian Stock Assessment Secretariat research document,|x1480-4883 ; |v2000/175|w(CaOODSP)9.507740
856	40|qPDF|s587 KB|uhttps://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-2000-175-eng.pdf