Total and natural mortality of red king crab (Paralithodes camtschaticus) in Norwegian waters: catch-curve analysis and indirect estimation methods
The red king crab ( Paralithodes camtschaticus ) is native to the Bering Sea, but was deliberately introduced to the Barents Sea during the 1960s. Since then, the red king crab has spread to Norwegian waters, and crab densities have increased sufficiently to support a coastal fishery. Information ab...
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fthighwire:oai:open-archive.highwire.org:icesjms:72/2/642 2023-05-15T15:38:58+02:00 Total and natural mortality of red king crab (Paralithodes camtschaticus) in Norwegian waters: catch-curve analysis and indirect estimation methods Windsland, Kristin 2015-01-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/72/2/642 https://doi.org/10.1093/icesjms/fsu138 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/72/2/642 http://dx.doi.org/10.1093/icesjms/fsu138 Copyright (C) 2015, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Original Articles TEXT 2015 fthighwire https://doi.org/10.1093/icesjms/fsu138 2015-02-28T22:17:52Z The red king crab ( Paralithodes camtschaticus ) is native to the Bering Sea, but was deliberately introduced to the Barents Sea during the 1960s. Since then, the red king crab has spread to Norwegian waters, and crab densities have increased sufficiently to support a coastal fishery. Information about total and natural mortality, which is important to ensure adequate management, is lacking. Estimates of annual total mortality ( Z ) were calculated using length-converted catch curves in three periods of different levels of exploitation. Separate analyses were run on trap and trawl data as well as on original and catch per unit effort-corrected data. Natural mortality was estimated using a linear regression of total mortality and exploitation level and by using indirect methods based on life history parameters. There was a significant increase in Z throughout the consecutive periods in both sexes. In males, the increase coincided with the increase in exploitation level. The increase in female mortality, which was not explained by exploitation level, is probably an effect of the increase in male mortality. Natural mortality ( M ), estimated using indirect methods, averaged 0.23 for both sexes. The estimated M using linear regression was 0.37/0.44, which may be an overestimate. Text Barents Sea Bering Sea Paralithodes camtschaticus Red king crab HighWire Press (Stanford University) Barents Sea Bering Sea ICES Journal of Marine Science 72 2 642 650 |
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HighWire Press (Stanford University) |
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English |
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Original Articles |
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Original Articles Windsland, Kristin Total and natural mortality of red king crab (Paralithodes camtschaticus) in Norwegian waters: catch-curve analysis and indirect estimation methods |
topic_facet |
Original Articles |
description |
The red king crab ( Paralithodes camtschaticus ) is native to the Bering Sea, but was deliberately introduced to the Barents Sea during the 1960s. Since then, the red king crab has spread to Norwegian waters, and crab densities have increased sufficiently to support a coastal fishery. Information about total and natural mortality, which is important to ensure adequate management, is lacking. Estimates of annual total mortality ( Z ) were calculated using length-converted catch curves in three periods of different levels of exploitation. Separate analyses were run on trap and trawl data as well as on original and catch per unit effort-corrected data. Natural mortality was estimated using a linear regression of total mortality and exploitation level and by using indirect methods based on life history parameters. There was a significant increase in Z throughout the consecutive periods in both sexes. In males, the increase coincided with the increase in exploitation level. The increase in female mortality, which was not explained by exploitation level, is probably an effect of the increase in male mortality. Natural mortality ( M ), estimated using indirect methods, averaged 0.23 for both sexes. The estimated M using linear regression was 0.37/0.44, which may be an overestimate. |
format |
Text |
author |
Windsland, Kristin |
author_facet |
Windsland, Kristin |
author_sort |
Windsland, Kristin |
title |
Total and natural mortality of red king crab (Paralithodes camtschaticus) in Norwegian waters: catch-curve analysis and indirect estimation methods |
title_short |
Total and natural mortality of red king crab (Paralithodes camtschaticus) in Norwegian waters: catch-curve analysis and indirect estimation methods |
title_full |
Total and natural mortality of red king crab (Paralithodes camtschaticus) in Norwegian waters: catch-curve analysis and indirect estimation methods |
title_fullStr |
Total and natural mortality of red king crab (Paralithodes camtschaticus) in Norwegian waters: catch-curve analysis and indirect estimation methods |
title_full_unstemmed |
Total and natural mortality of red king crab (Paralithodes camtschaticus) in Norwegian waters: catch-curve analysis and indirect estimation methods |
title_sort |
total and natural mortality of red king crab (paralithodes camtschaticus) in norwegian waters: catch-curve analysis and indirect estimation methods |
publisher |
Oxford University Press |
publishDate |
2015 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/72/2/642 https://doi.org/10.1093/icesjms/fsu138 |
geographic |
Barents Sea Bering Sea |
geographic_facet |
Barents Sea Bering Sea |
genre |
Barents Sea Bering Sea Paralithodes camtschaticus Red king crab |
genre_facet |
Barents Sea Bering Sea Paralithodes camtschaticus Red king crab |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/72/2/642 http://dx.doi.org/10.1093/icesjms/fsu138 |
op_rights |
Copyright (C) 2015, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1093/icesjms/fsu138 |
container_title |
ICES Journal of Marine Science |
container_volume |
72 |
container_issue |
2 |
container_start_page |
642 |
op_container_end_page |
650 |
_version_ |
1766370417066377216 |