Modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (Chionoecetes opilio) pot fishery
Size selection in commercial snow crab (Chionoecetes opilio) pot fisheries is important for reducing on-board sorting and unintended mortality of undersized individuals. In this paper, we tested whether snow crab of various sizes geometrically could pass through diamond meshes of different sizes and...
Published in: | Ocean & Coastal Management |
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Online Access: | https://hdl.handle.net/10037/20107 https://doi.org/10.1016/j.ocecoaman.2020.105495 |
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ftunivtroemsoe:oai:munin.uit.no:10037/20107 2023-05-15T15:54:08+02:00 Modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (Chionoecetes opilio) pot fishery Herrmann, Bent Grimaldo, Eduardo Brcic, Jure Cerbule, Kristine 2020-12-18 https://hdl.handle.net/10037/20107 https://doi.org/10.1016/j.ocecoaman.2020.105495 eng eng Elsevier Ocean and Coastal Management info:eu-repo/grantAgreement/RCN/MAROFF-2/269251/Norway/Improving the design, efficiency and environmental friendliness of snow crab pots// Herrmann B, Grimaldo Ed, Brcic J, Cerbule K. Modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (Chionoecetes opilio) pot fishery. Ocean and Coastal Management. 2020;201 FRIDAID 1861668 https://doi.org/10.1016/j.ocecoaman.2020.105495 0964-5691 1873-524X https://hdl.handle.net/10037/20107 openAccess Copyright 2020 The Author(s) VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.1016/j.ocecoaman.2020.105495 2021-06-25T17:57:51Z Size selection in commercial snow crab (Chionoecetes opilio) pot fisheries is important for reducing on-board sorting and unintended mortality of undersized individuals. In this paper, we tested whether snow crab of various sizes geometrically could pass through diamond meshes of different sizes and opening angles, to estimate a model for predicting the effect of mesh size and mesh opening angle on snow crab size selectivity. The model was able to explain the size selection results from earlier sea trials using commercial snow crab pots. Size selection was strongly dependent on mesh opening angle, making it less well-defined for the conical pots often used in snow crab fisheries where mesh opening angle varies. We predicted the optimal mesh size for the Norwegian snow crab fishery is 140 mm with a 65◦ opening angle, resulting in high capture efficiency for target size snow crab (larger than 100 mm carapace width) and low sorting effort, with approximately 10% of the catch consisting of undersized snow crab. Our model can potentially be used for other snow crab fisheries. Article in Journal/Newspaper Chionoecetes opilio Snow crab University of Tromsø: Munin Open Research Archive Ocean & Coastal Management 201 105495 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Herrmann, Bent Grimaldo, Eduardo Brcic, Jure Cerbule, Kristine Modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (Chionoecetes opilio) pot fishery |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
description |
Size selection in commercial snow crab (Chionoecetes opilio) pot fisheries is important for reducing on-board sorting and unintended mortality of undersized individuals. In this paper, we tested whether snow crab of various sizes geometrically could pass through diamond meshes of different sizes and opening angles, to estimate a model for predicting the effect of mesh size and mesh opening angle on snow crab size selectivity. The model was able to explain the size selection results from earlier sea trials using commercial snow crab pots. Size selection was strongly dependent on mesh opening angle, making it less well-defined for the conical pots often used in snow crab fisheries where mesh opening angle varies. We predicted the optimal mesh size for the Norwegian snow crab fishery is 140 mm with a 65◦ opening angle, resulting in high capture efficiency for target size snow crab (larger than 100 mm carapace width) and low sorting effort, with approximately 10% of the catch consisting of undersized snow crab. Our model can potentially be used for other snow crab fisheries. |
format |
Article in Journal/Newspaper |
author |
Herrmann, Bent Grimaldo, Eduardo Brcic, Jure Cerbule, Kristine |
author_facet |
Herrmann, Bent Grimaldo, Eduardo Brcic, Jure Cerbule, Kristine |
author_sort |
Herrmann, Bent |
title |
Modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (Chionoecetes opilio) pot fishery |
title_short |
Modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (Chionoecetes opilio) pot fishery |
title_full |
Modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (Chionoecetes opilio) pot fishery |
title_fullStr |
Modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (Chionoecetes opilio) pot fishery |
title_full_unstemmed |
Modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (Chionoecetes opilio) pot fishery |
title_sort |
modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (chionoecetes opilio) pot fishery |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/20107 https://doi.org/10.1016/j.ocecoaman.2020.105495 |
genre |
Chionoecetes opilio Snow crab |
genre_facet |
Chionoecetes opilio Snow crab |
op_relation |
Ocean and Coastal Management info:eu-repo/grantAgreement/RCN/MAROFF-2/269251/Norway/Improving the design, efficiency and environmental friendliness of snow crab pots// Herrmann B, Grimaldo Ed, Brcic J, Cerbule K. Modelling the effect of mesh size and opening angle on size selection and capture pattern in a snow crab (Chionoecetes opilio) pot fishery. Ocean and Coastal Management. 2020;201 FRIDAID 1861668 https://doi.org/10.1016/j.ocecoaman.2020.105495 0964-5691 1873-524X https://hdl.handle.net/10037/20107 |
op_rights |
openAccess Copyright 2020 The Author(s) |
op_doi |
https://doi.org/10.1016/j.ocecoaman.2020.105495 |
container_title |
Ocean & Coastal Management |
container_volume |
201 |
container_start_page |
105495 |
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1766389307032993792 |