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Estimating harbor porpoise bycatch in the Gulf of Maine sink gillnet fishery
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1994
[PDF-276.68 KB]
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Description:"The Northeast Fisheries Science Center (NEFSC) has previously prepared estimates of harbor porpoise bycatch tn the Gulf of Matne for 1990-1992 (Bisack 1993; Smith, et al. 1993), In February 1994, at an international workshop on harbor porpoise, attention was drawn to evident under-reporting of bycatch in some instances, implying that these estimates were likely to be too low, The workshop concluded that an improved estimation method should be developed to address this problem, and that bycatch estimates should then be recalculated with the new method (Palka [Ed,] 1994), After the workshop the NEFSC developed a new method of estimattng bycatch; this was reviewed and accepted by members of the workshop, The NEFSC used the improved method to prepare revised estimates of harbor porpoise bycatch in the Gulf of Maine stnk gillnet fishery for 1990-1993, which were reported tn June 1994. In this document, we review reasons for changtng the old method, and the new procedures used for calculating revised estimates of bycatch. We have also included summaries of the data and of the new estimates. The deSCriptions are meant to be non-technical, so we have simplified or omitted details to keep the document reasonably concise.
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Content Notes:"August 1994."
System requirements: Adobe Acrobat Reader.
Includes bibliographical references (page 5).
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Rights Information:Public Domain
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