Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model
Abstract Thorarinsdóttir, G. G., Jacobson, L., Ragnarsson, S. Á., Garcia, E. G., and Gunnarsson, K. 2010. Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model. – ICES Journal of Marine Sci...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsp236 http://academic.oup.com/icesjms/article-pdf/67/2/345/29135222/fsp236.pdf |
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croxfordunivpr:10.1093/icesjms/fsp236 2023-05-15T15:22:31+02:00 Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model Thorarinsdóttir, Gudrun G. Jacobson, Larry Ragnarsson, Stefan Áki Garcia, Elena Guijarro Gunnarsson, Karl 2009 http://dx.doi.org/10.1093/icesjms/fsp236 http://academic.oup.com/icesjms/article-pdf/67/2/345/29135222/fsp236.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 67, issue 2, page 345-354 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2009 croxfordunivpr https://doi.org/10.1093/icesjms/fsp236 2022-12-29T15:35:26Z Abstract Thorarinsdóttir, G. G., Jacobson, L., Ragnarsson, S. Á., Garcia, E. G., and Gunnarsson, K. 2010. Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model. – ICES Journal of Marine Science, 67: 345–354. Estimates of capture efficiency and size selectivity for commercial dredges are important in estimating stock biomass and setting catch limits for the ocean quahog off Iceland and the United States. Ocean quahogs are long-lived, slow-growing, and sensitive to overharvest resulting from poor estimates of capture efficiency and stock biomass. Capture efficiency and size selectivity were estimated simultaneously in mixed-effect SELECT models using diver and commercial dredge experiment data from the shallow-water habitats off Iceland. Estimated capture efficiency for the commercial dredge E = 92% (CV = 8%) was high for large [107.5 mm shell length (SL)] ocean quahogs. Size selectivity followed an ascending logistic curve, with L50 = 70.5 mm SL (CV 4%), a selectivity range of 17.6 mm SL, and substantial variability among experimental dredge tows. Estimated capture efficiency was higher than that for ocean quahogs in US waters, possibly because of the deep habitats off the United States or uncertainty about dredge position during US depletion experiments. Scaling maximum selectivity from the SELECT model to one reduces correlations between size-selectivity and capture-efficiency parameters and may enhance the utility of selectivity estimates in stock assessment modelling. Our experimental and modelling approach may be useful for studies with other non-mobile benthic species. Article in Journal/Newspaper Arctica islandica Iceland Ocean quahog Oxford University Press (via Crossref) ICES Journal of Marine Science 67 2 345 354 |
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Oxford University Press (via Crossref) |
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English |
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Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
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Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Thorarinsdóttir, Gudrun G. Jacobson, Larry Ragnarsson, Stefan Áki Garcia, Elena Guijarro Gunnarsson, Karl Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Thorarinsdóttir, G. G., Jacobson, L., Ragnarsson, S. Á., Garcia, E. G., and Gunnarsson, K. 2010. Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model. – ICES Journal of Marine Science, 67: 345–354. Estimates of capture efficiency and size selectivity for commercial dredges are important in estimating stock biomass and setting catch limits for the ocean quahog off Iceland and the United States. Ocean quahogs are long-lived, slow-growing, and sensitive to overharvest resulting from poor estimates of capture efficiency and stock biomass. Capture efficiency and size selectivity were estimated simultaneously in mixed-effect SELECT models using diver and commercial dredge experiment data from the shallow-water habitats off Iceland. Estimated capture efficiency for the commercial dredge E = 92% (CV = 8%) was high for large [107.5 mm shell length (SL)] ocean quahogs. Size selectivity followed an ascending logistic curve, with L50 = 70.5 mm SL (CV 4%), a selectivity range of 17.6 mm SL, and substantial variability among experimental dredge tows. Estimated capture efficiency was higher than that for ocean quahogs in US waters, possibly because of the deep habitats off the United States or uncertainty about dredge position during US depletion experiments. Scaling maximum selectivity from the SELECT model to one reduces correlations between size-selectivity and capture-efficiency parameters and may enhance the utility of selectivity estimates in stock assessment modelling. Our experimental and modelling approach may be useful for studies with other non-mobile benthic species. |
format |
Article in Journal/Newspaper |
author |
Thorarinsdóttir, Gudrun G. Jacobson, Larry Ragnarsson, Stefan Áki Garcia, Elena Guijarro Gunnarsson, Karl |
author_facet |
Thorarinsdóttir, Gudrun G. Jacobson, Larry Ragnarsson, Stefan Áki Garcia, Elena Guijarro Gunnarsson, Karl |
author_sort |
Thorarinsdóttir, Gudrun G. |
title |
Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model |
title_short |
Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model |
title_full |
Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model |
title_fullStr |
Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model |
title_full_unstemmed |
Capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (Arctica islandica): simultaneous estimation in the SELECT model |
title_sort |
capture efficiency and size selectivity of hydraulic clam dredges used in fishing for ocean quahogs (arctica islandica): simultaneous estimation in the select model |
publisher |
Oxford University Press (OUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1093/icesjms/fsp236 http://academic.oup.com/icesjms/article-pdf/67/2/345/29135222/fsp236.pdf |
genre |
Arctica islandica Iceland Ocean quahog |
genre_facet |
Arctica islandica Iceland Ocean quahog |
op_source |
ICES Journal of Marine Science volume 67, issue 2, page 345-354 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsp236 |
container_title |
ICES Journal of Marine Science |
container_volume |
67 |
container_issue |
2 |
container_start_page |
345 |
op_container_end_page |
354 |
_version_ |
1766353170939772928 |