Understanding and predicting size selection in diamond-mesh cod ends for danish seining: A study based on sea trials and computer simulations
Danish seining is an important fishing method used to harvest demersal species. Knowledge about the size selectivity of different demersal species with this type of fishing gear is therefore of importance for managing the exploitation of marine resources. However, there are only limited data on size...
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ftdtupubl:oai:pure.atira.dk:publications/e6c6f086-94ba-420b-93ba-38b969b67116 2024-06-23T07:51:04+00:00 Understanding and predicting size selection in diamond-mesh cod ends for danish seining: A study based on sea trials and computer simulations Herrmann, Bent Krag, Ludvig Ahm Feekings, Jordan P. Noack, Thomas 2016 application/pdf https://orbit.dtu.dk/en/publications/e6c6f086-94ba-420b-93ba-38b969b67116 https://doi.org/10.1080/19425120.2016.1161682 https://backend.orbit.dtu.dk/ws/files/124913824/Publishers_version.pdf eng eng https://orbit.dtu.dk/en/publications/e6c6f086-94ba-420b-93ba-38b969b67116 info:eu-repo/semantics/openAccess Herrmann , B , Krag , L A , Feekings , J P & Noack , T 2016 , ' Understanding and predicting size selection in diamond-mesh cod ends for danish seining: A study based on sea trials and computer simulations ' , Marine and Coastal Fisheries , vol. 8 , no. 1 , pp. 277-291 . https://doi.org/10.1080/19425120.2016.1161682 /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2016 ftdtupubl https://doi.org/10.1080/19425120.2016.1161682 2024-06-04T15:14:17Z Danish seining is an important fishing method used to harvest demersal species. Knowledge about the size selectivity of different demersal species with this type of fishing gear is therefore of importance for managing the exploitation of marine resources. However, there are only limited data on size selection in cod ends in this fishery. Sea trials were therefore carried out to collect size selectivity data for Atlantic Cod Gadus morhua, Haddock Melanogrammus aeglefinus, and Witch Flounder Glyptocephalus cynoglossus for a diamond-mesh cod end. For all three species, the data were best described by a double logistic selection curve, implying that two different size selection processes occur in the cod end. The double selection process could be explained by an additional selection process occurring through slack meshes. The results imply that the escapement of 46% and 34% of the larger Atlantic Cod and Haddock (those above 48 cm), respectively, would be through wide-open or slack meshes. Since these mesh states are only likely to be present in the latest stage of the fishing process (e.g., when the cod end is near the surface), a large fraction of the bigger fish probably escaped near the surface, which might influence their likelihood of survival. Furthermore, based on the models established for explaining the experimental size selection, we were able to predict the effect of changing the mesh size on cod end size selection in the Danish seine fishery Article in Journal/Newspaper atlantic cod Gadus morhua Technical University of Denmark: DTU Orbit Marine and Coastal Fisheries 8 1 277 291 |
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Technical University of Denmark: DTU Orbit |
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ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Herrmann, Bent Krag, Ludvig Ahm Feekings, Jordan P. Noack, Thomas Understanding and predicting size selection in diamond-mesh cod ends for danish seining: A study based on sea trials and computer simulations |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Danish seining is an important fishing method used to harvest demersal species. Knowledge about the size selectivity of different demersal species with this type of fishing gear is therefore of importance for managing the exploitation of marine resources. However, there are only limited data on size selection in cod ends in this fishery. Sea trials were therefore carried out to collect size selectivity data for Atlantic Cod Gadus morhua, Haddock Melanogrammus aeglefinus, and Witch Flounder Glyptocephalus cynoglossus for a diamond-mesh cod end. For all three species, the data were best described by a double logistic selection curve, implying that two different size selection processes occur in the cod end. The double selection process could be explained by an additional selection process occurring through slack meshes. The results imply that the escapement of 46% and 34% of the larger Atlantic Cod and Haddock (those above 48 cm), respectively, would be through wide-open or slack meshes. Since these mesh states are only likely to be present in the latest stage of the fishing process (e.g., when the cod end is near the surface), a large fraction of the bigger fish probably escaped near the surface, which might influence their likelihood of survival. Furthermore, based on the models established for explaining the experimental size selection, we were able to predict the effect of changing the mesh size on cod end size selection in the Danish seine fishery |
format |
Article in Journal/Newspaper |
author |
Herrmann, Bent Krag, Ludvig Ahm Feekings, Jordan P. Noack, Thomas |
author_facet |
Herrmann, Bent Krag, Ludvig Ahm Feekings, Jordan P. Noack, Thomas |
author_sort |
Herrmann, Bent |
title |
Understanding and predicting size selection in diamond-mesh cod ends for danish seining: A study based on sea trials and computer simulations |
title_short |
Understanding and predicting size selection in diamond-mesh cod ends for danish seining: A study based on sea trials and computer simulations |
title_full |
Understanding and predicting size selection in diamond-mesh cod ends for danish seining: A study based on sea trials and computer simulations |
title_fullStr |
Understanding and predicting size selection in diamond-mesh cod ends for danish seining: A study based on sea trials and computer simulations |
title_full_unstemmed |
Understanding and predicting size selection in diamond-mesh cod ends for danish seining: A study based on sea trials and computer simulations |
title_sort |
understanding and predicting size selection in diamond-mesh cod ends for danish seining: a study based on sea trials and computer simulations |
publishDate |
2016 |
url |
https://orbit.dtu.dk/en/publications/e6c6f086-94ba-420b-93ba-38b969b67116 https://doi.org/10.1080/19425120.2016.1161682 https://backend.orbit.dtu.dk/ws/files/124913824/Publishers_version.pdf |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Herrmann , B , Krag , L A , Feekings , J P & Noack , T 2016 , ' Understanding and predicting size selection in diamond-mesh cod ends for danish seining: A study based on sea trials and computer simulations ' , Marine and Coastal Fisheries , vol. 8 , no. 1 , pp. 277-291 . https://doi.org/10.1080/19425120.2016.1161682 |
op_relation |
https://orbit.dtu.dk/en/publications/e6c6f086-94ba-420b-93ba-38b969b67116 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1080/19425120.2016.1161682 |
container_title |
Marine and Coastal Fisheries |
container_volume |
8 |
container_issue |
1 |
container_start_page |
277 |
op_container_end_page |
291 |
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1802642063815081984 |