DOI:10.1577/M04-111.1 Index-Removal Estimates of Dredge Efficiency for Sea Scallops
access to the southern section of Georges Bank Closed Area II in the North Atlantic to harvest the large biomass of sea scallops Placopecten magellanicus that had ac-cumulated during a 5-year multispecies fishing ban. Pri-or to the opening, managers conducted a fine-scale sur-vey of the area and a c...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1999
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.500.1437 http://www.fisheries.vims.edu/hoenig/pdfs/Gedamke_et_al_scallop_index_removal.pdf |
| Summary: | access to the southern section of Georges Bank Closed Area II in the North Atlantic to harvest the large biomass of sea scallops Placopecten magellanicus that had ac-cumulated during a 5-year multispecies fishing ban. Pri-or to the opening, managers conducted a fine-scale sur-vey of the area and a catch quota was established as a fixed percentage of the estimated biomass. The estimate of biomass was uncertain because it was based on es-timates of dredge efficiency that ranged from 16 % to 40%. Because survey stations were reoccupied at the end of the fishery and significant removals had occurred, it was possible to use the index-removal method to ob-tain an estimate of gear efficiency. The estimate was 54 % and ranged from 41 % to 54 % depending on model inputs. The 54 % efficiency is believed to represent a |
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