Escape mechanisms in crab and lobster pots : implications for snow crab (chionoecetes opilio) stock conservation and policy review
Thesis (M.M.S)--Memorial University of Newfoundland, 2009. Marine Studies Includes bibliographical references (leaves 102-114) Since the collapse of groundfish stocks in the early 1990s, market demand and industry diversification has placed considerable pressure upon crab stocks in Newfoundland and...
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ftmemorialunivdc:oai:collections.mun.ca:theses4/53606 2023-05-15T15:54:09+02:00 Escape mechanisms in crab and lobster pots : implications for snow crab (chionoecetes opilio) stock conservation and policy review Saunders, Robyn L. (Robyn Lynn), 1975- Canada--Newfoundland and Labrador; 2009 ix, 114 leaves : ill., maps (some col.) Image/jpeg; Application/pdf http://collections.mun.ca/cdm/ref/collection/theses4/id/53606 Eng eng Electronic Theses and Dissertations (13.99 MB) -- http://collections.mun.ca/PDFs/theses/Saunders_RobynL.pdf a3183760 http://collections.mun.ca/cdm/ref/collection/theses4/id/53606 The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries Escapement (Fisheries)--Newfoundland and Labrador Snow crab fisheries--Newfoundland and Labrador--Management Snow crab--Conservation--Law and legislation--Newfoundland and Labrador Text Electronic thesis or dissertation 2009 ftmemorialunivdc 2015-08-06T19:22:02Z Thesis (M.M.S)--Memorial University of Newfoundland, 2009. Marine Studies Includes bibliographical references (leaves 102-114) Since the collapse of groundfish stocks in the early 1990s, market demand and industry diversification has placed considerable pressure upon crab stocks in Newfoundland and Labrador, specifically snow crab (Chionoecetes opilio). The total allowable catch (TAC) for snow crab in the Newfoundland region peaked in 1999 at 69,000 tonnes. Fisheries and Oceans Canada has been reactive in its approach to management and has implemented various measures in line with the precautionary approach. -- Work conducted on modifications to crab pots, specifically the development of escape mechanisms for undersized crab, has generated attention as a means to improve sustainability of the resource. commentary from local crab harvesters using experimental escape devices in their pots has been positive in that they are seeing less undersized crab in their catch. This translates to reduced sorting time for the harvester, less mortality, and fewer non-commercial crab exposed to air and drop factors. This further increases the chance that these undersized individuals will be available for harvest in subsequent years. -- The use of escape mechanisms in shellfish fisheries is not a new concept. Reducing ghost fishing of lost and derelict gear has prompted research that has translated into new management measures in many jurisdictions. Reducing the incidental capture of undersized crab and lobster has been an additional outcome of escape device utilization is most crab and lobster fisheries around the world. -- Experiments were conducted in Newfoundland as early as the 1890s with escape devices in lobster gear. While lath spacing in lobster pots has been enforced since 1937 it is interesting that the use of rigid escape mechanisms in snow crab pots has not yet been adopted as a mandatory management measure although efforts to recommend policy changes have been underway since 2004 in the region. -- The following document reviews the use of escape mechanisms in different decapods fisheries around the world, benefits of their use in Newfoundland and Labrador, and the implications for snow crab stock conservation and policy review. Thesis Chionoecetes opilio Newfoundland studies Snow crab University of Newfoundland Memorial University of Newfoundland: Digital Archives Initiative (DAI) Newfoundland Canada Tac ENVELOPE(-59.517,-59.517,-62.500,-62.500) |
institution |
Open Polar |
collection |
Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
op_collection_id |
ftmemorialunivdc |
language |
English |
topic |
Escapement (Fisheries)--Newfoundland and Labrador Snow crab fisheries--Newfoundland and Labrador--Management Snow crab--Conservation--Law and legislation--Newfoundland and Labrador |
spellingShingle |
Escapement (Fisheries)--Newfoundland and Labrador Snow crab fisheries--Newfoundland and Labrador--Management Snow crab--Conservation--Law and legislation--Newfoundland and Labrador Saunders, Robyn L. (Robyn Lynn), 1975- Escape mechanisms in crab and lobster pots : implications for snow crab (chionoecetes opilio) stock conservation and policy review |
topic_facet |
Escapement (Fisheries)--Newfoundland and Labrador Snow crab fisheries--Newfoundland and Labrador--Management Snow crab--Conservation--Law and legislation--Newfoundland and Labrador |
description |
Thesis (M.M.S)--Memorial University of Newfoundland, 2009. Marine Studies Includes bibliographical references (leaves 102-114) Since the collapse of groundfish stocks in the early 1990s, market demand and industry diversification has placed considerable pressure upon crab stocks in Newfoundland and Labrador, specifically snow crab (Chionoecetes opilio). The total allowable catch (TAC) for snow crab in the Newfoundland region peaked in 1999 at 69,000 tonnes. Fisheries and Oceans Canada has been reactive in its approach to management and has implemented various measures in line with the precautionary approach. -- Work conducted on modifications to crab pots, specifically the development of escape mechanisms for undersized crab, has generated attention as a means to improve sustainability of the resource. commentary from local crab harvesters using experimental escape devices in their pots has been positive in that they are seeing less undersized crab in their catch. This translates to reduced sorting time for the harvester, less mortality, and fewer non-commercial crab exposed to air and drop factors. This further increases the chance that these undersized individuals will be available for harvest in subsequent years. -- The use of escape mechanisms in shellfish fisheries is not a new concept. Reducing ghost fishing of lost and derelict gear has prompted research that has translated into new management measures in many jurisdictions. Reducing the incidental capture of undersized crab and lobster has been an additional outcome of escape device utilization is most crab and lobster fisheries around the world. -- Experiments were conducted in Newfoundland as early as the 1890s with escape devices in lobster gear. While lath spacing in lobster pots has been enforced since 1937 it is interesting that the use of rigid escape mechanisms in snow crab pots has not yet been adopted as a mandatory management measure although efforts to recommend policy changes have been underway since 2004 in the region. -- The following document reviews the use of escape mechanisms in different decapods fisheries around the world, benefits of their use in Newfoundland and Labrador, and the implications for snow crab stock conservation and policy review. |
format |
Thesis |
author |
Saunders, Robyn L. (Robyn Lynn), 1975- |
author_facet |
Saunders, Robyn L. (Robyn Lynn), 1975- |
author_sort |
Saunders, Robyn L. (Robyn Lynn), 1975- |
title |
Escape mechanisms in crab and lobster pots : implications for snow crab (chionoecetes opilio) stock conservation and policy review |
title_short |
Escape mechanisms in crab and lobster pots : implications for snow crab (chionoecetes opilio) stock conservation and policy review |
title_full |
Escape mechanisms in crab and lobster pots : implications for snow crab (chionoecetes opilio) stock conservation and policy review |
title_fullStr |
Escape mechanisms in crab and lobster pots : implications for snow crab (chionoecetes opilio) stock conservation and policy review |
title_full_unstemmed |
Escape mechanisms in crab and lobster pots : implications for snow crab (chionoecetes opilio) stock conservation and policy review |
title_sort |
escape mechanisms in crab and lobster pots : implications for snow crab (chionoecetes opilio) stock conservation and policy review |
publishDate |
2009 |
url |
http://collections.mun.ca/cdm/ref/collection/theses4/id/53606 |
op_coverage |
Canada--Newfoundland and Labrador; |
long_lat |
ENVELOPE(-59.517,-59.517,-62.500,-62.500) |
geographic |
Newfoundland Canada Tac |
geographic_facet |
Newfoundland Canada Tac |
genre |
Chionoecetes opilio Newfoundland studies Snow crab University of Newfoundland |
genre_facet |
Chionoecetes opilio Newfoundland studies Snow crab University of Newfoundland |
op_source |
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries |
op_relation |
Electronic Theses and Dissertations (13.99 MB) -- http://collections.mun.ca/PDFs/theses/Saunders_RobynL.pdf a3183760 http://collections.mun.ca/cdm/ref/collection/theses4/id/53606 |
op_rights |
The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. |
_version_ |
1766389323228250112 |