Sequential codend improves quality of trawl-caught cod
Trawl-caught fish are frequently associated with deteriorated catch quality. This study presents a new dual sequential codend concept with the aim of improving the quality of trawl-caught fish by minimizing the frequency and severity of catch damage. During towing, the fish are retained in an anteri...
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ftrepec:oai:RePEc:plo:pone00:0204328 2023-05-15T16:19:09+02:00 Sequential codend improves quality of trawl-caught cod Jesse Brinkhof Stein H Olsen Ólafur A Ingólfsson Bent Herrmann Roger B Larsen https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0204328 https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0204328&type=printable unknown https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0204328 https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0204328&type=printable article ftrepec 2020-12-04T13:36:18Z Trawl-caught fish are frequently associated with deteriorated catch quality. This study presents a new dual sequential codend concept with the aim of improving the quality of trawl-caught fish by minimizing the frequency and severity of catch damage. During towing, the fish are retained in an anterior codend segment with the legislated mesh size. A quality improving codend segment, is attached to the aft part of the first codend segment. Its entrance is closed during the towing phase and opened at a predefined depth during haul-back. Comparing the quality of cod (Gadus morhua L.) retained in the sequential codend with cod caught in a conventional codend, demonstrated a significant improvement in the catch quality, i.e. reduction in catch damages. Cod caught in a conventional codend had only a 3.6% probability of being without visually detectable catch damage. The probability for catching cod without catch damage was five times higher when using the dual sequential codend. Furthermore, cod caught in the sequential codend had a significantly reduced probability of incurring specific catch damage, such as gear marks, poor exsanguination, ecchymosis, and skin abrasions. Article in Journal/Newspaper Gadus morhua RePEc (Research Papers in Economics) |
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Trawl-caught fish are frequently associated with deteriorated catch quality. This study presents a new dual sequential codend concept with the aim of improving the quality of trawl-caught fish by minimizing the frequency and severity of catch damage. During towing, the fish are retained in an anterior codend segment with the legislated mesh size. A quality improving codend segment, is attached to the aft part of the first codend segment. Its entrance is closed during the towing phase and opened at a predefined depth during haul-back. Comparing the quality of cod (Gadus morhua L.) retained in the sequential codend with cod caught in a conventional codend, demonstrated a significant improvement in the catch quality, i.e. reduction in catch damages. Cod caught in a conventional codend had only a 3.6% probability of being without visually detectable catch damage. The probability for catching cod without catch damage was five times higher when using the dual sequential codend. Furthermore, cod caught in the sequential codend had a significantly reduced probability of incurring specific catch damage, such as gear marks, poor exsanguination, ecchymosis, and skin abrasions. |
format |
Article in Journal/Newspaper |
author |
Jesse Brinkhof Stein H Olsen Ólafur A Ingólfsson Bent Herrmann Roger B Larsen |
spellingShingle |
Jesse Brinkhof Stein H Olsen Ólafur A Ingólfsson Bent Herrmann Roger B Larsen Sequential codend improves quality of trawl-caught cod |
author_facet |
Jesse Brinkhof Stein H Olsen Ólafur A Ingólfsson Bent Herrmann Roger B Larsen |
author_sort |
Jesse Brinkhof |
title |
Sequential codend improves quality of trawl-caught cod |
title_short |
Sequential codend improves quality of trawl-caught cod |
title_full |
Sequential codend improves quality of trawl-caught cod |
title_fullStr |
Sequential codend improves quality of trawl-caught cod |
title_full_unstemmed |
Sequential codend improves quality of trawl-caught cod |
title_sort |
sequential codend improves quality of trawl-caught cod |
url |
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0204328 https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0204328&type=printable |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0204328 https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0204328&type=printable |
_version_ |
1766005486800338944 |