Taking Refuge from Bycatch Issues: Red King Crab ( Paralithodes camtschaticus) and Trawl Fisheries in the Eastern Bering Sea
Concerns about possibly heavy impacts of bottom trawl fisheries on red king crab (Paralithodes camtschaticus) pot fisheries in the eastern Bering Sea led in 1987 to an emergency closure of trawling in an area of adult and juvenile crab habitat. We examine the effectiveness of this bycatch refuge in...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1993
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Online Access: | http://dx.doi.org/10.1139/f93-223 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-223 |
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crcansciencepubl:10.1139/f93-223 2024-09-15T17:59:26+00:00 Taking Refuge from Bycatch Issues: Red King Crab ( Paralithodes camtschaticus) and Trawl Fisheries in the Eastern Bering Sea Armstrong, David A. Wainwright, Thomas C. Jensen, Gregory C. Dinnel, Paul A. Andersen, Helle B. 1993 http://dx.doi.org/10.1139/f93-223 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-223 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 50, issue 9, page 1993-2000 ISSN 0706-652X 1205-7533 journal-article 1993 crcansciencepubl https://doi.org/10.1139/f93-223 2024-08-29T04:08:50Z Concerns about possibly heavy impacts of bottom trawl fisheries on red king crab (Paralithodes camtschaticus) pot fisheries in the eastern Bering Sea led in 1987 to an emergency closure of trawling in an area of adult and juvenile crab habitat. We examine the effectiveness of this bycatch refuge in protecting and possibly enhancing the crab resource using three approaches. First, bycatch of crab in trawl fisheries is a small proportion of total estimated abundance throughout the southeastern Bering Sea but may be high relative to stock abundance within the closed area and relative to annual crab landings; recent regulations have diminished this apparent effect. Effects of direct bycatch on the stock are obscured by lack of evidence on indirect effects of trawling, including crushing of crab and degredation of juvenile habitat. Second, surveys inside and outside the refuge before and after closure show no significant changes in abundance of female and prerecruit male crab. Third, important breeding and hatching grounds and juvenile habitat are not protected by the refuge, leaving long-term stock renewal subject to trawl impacts. We suggest that full consideration of the needs of all life history stages could lead to a more effective refuge design. Article in Journal/Newspaper Bering Sea Paralithodes camtschaticus Red king crab Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 50 9 1993 2000 |
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Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Concerns about possibly heavy impacts of bottom trawl fisheries on red king crab (Paralithodes camtschaticus) pot fisheries in the eastern Bering Sea led in 1987 to an emergency closure of trawling in an area of adult and juvenile crab habitat. We examine the effectiveness of this bycatch refuge in protecting and possibly enhancing the crab resource using three approaches. First, bycatch of crab in trawl fisheries is a small proportion of total estimated abundance throughout the southeastern Bering Sea but may be high relative to stock abundance within the closed area and relative to annual crab landings; recent regulations have diminished this apparent effect. Effects of direct bycatch on the stock are obscured by lack of evidence on indirect effects of trawling, including crushing of crab and degredation of juvenile habitat. Second, surveys inside and outside the refuge before and after closure show no significant changes in abundance of female and prerecruit male crab. Third, important breeding and hatching grounds and juvenile habitat are not protected by the refuge, leaving long-term stock renewal subject to trawl impacts. We suggest that full consideration of the needs of all life history stages could lead to a more effective refuge design. |
format |
Article in Journal/Newspaper |
author |
Armstrong, David A. Wainwright, Thomas C. Jensen, Gregory C. Dinnel, Paul A. Andersen, Helle B. |
spellingShingle |
Armstrong, David A. Wainwright, Thomas C. Jensen, Gregory C. Dinnel, Paul A. Andersen, Helle B. Taking Refuge from Bycatch Issues: Red King Crab ( Paralithodes camtschaticus) and Trawl Fisheries in the Eastern Bering Sea |
author_facet |
Armstrong, David A. Wainwright, Thomas C. Jensen, Gregory C. Dinnel, Paul A. Andersen, Helle B. |
author_sort |
Armstrong, David A. |
title |
Taking Refuge from Bycatch Issues: Red King Crab ( Paralithodes camtschaticus) and Trawl Fisheries in the Eastern Bering Sea |
title_short |
Taking Refuge from Bycatch Issues: Red King Crab ( Paralithodes camtschaticus) and Trawl Fisheries in the Eastern Bering Sea |
title_full |
Taking Refuge from Bycatch Issues: Red King Crab ( Paralithodes camtschaticus) and Trawl Fisheries in the Eastern Bering Sea |
title_fullStr |
Taking Refuge from Bycatch Issues: Red King Crab ( Paralithodes camtschaticus) and Trawl Fisheries in the Eastern Bering Sea |
title_full_unstemmed |
Taking Refuge from Bycatch Issues: Red King Crab ( Paralithodes camtschaticus) and Trawl Fisheries in the Eastern Bering Sea |
title_sort |
taking refuge from bycatch issues: red king crab ( paralithodes camtschaticus) and trawl fisheries in the eastern bering sea |
publisher |
Canadian Science Publishing |
publishDate |
1993 |
url |
http://dx.doi.org/10.1139/f93-223 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-223 |
genre |
Bering Sea Paralithodes camtschaticus Red king crab |
genre_facet |
Bering Sea Paralithodes camtschaticus Red king crab |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 50, issue 9, page 1993-2000 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f93-223 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
50 |
container_issue |
9 |
container_start_page |
1993 |
op_container_end_page |
2000 |
_version_ |
1810436530137726976 |