Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua)
Trawl-caught Atlantic cod (Gadus morhua) often yield highly variable fillet quality that may be related to capture stress. To investigate mechanisms involved in causing variable quality, commercial-sized (3.5±0.9 kg) Atlantic cod were swum to exhaustion in a large swim tunnel and subsequently expose...
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Online Access: | https://hdl.handle.net/10037/18923 https://doi.org/10.1371/journal.pone.0234059 |
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ftunivtroemsoe:oai:munin.uit.no:10037/18923 2023-05-15T15:26:53+02:00 Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua) Svalheim, Ragnhild Aven Aas-Hansen, Øyvind Heia, Karsten Karlsson-Drangsholt, Anders Olsen, Stein Harris Johnsen, Helge K. 2020-06-18 https://hdl.handle.net/10037/18923 https://doi.org/10.1371/journal.pone.0234059 eng eng Public Library of Science PLOS ONE info:eu-repo/grantAgreement/RCN/SFI/203477/Norway/CRISP - Centre for Research-based Innovation in Sustainable Fish Capture and Processing Technology// Svalheim, Aas-Hansen, Heia, Karlsson-Drangsholt, Olsen, Johnsen. Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua). PLOS ONE. 2020;15:e0234059(6):1-15 FRIDAID 1819761 doi:10.1371/journal.pone.0234059 1932-6203 https://hdl.handle.net/10037/18923 openAccess Copyright 2020 The Author(s) VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.1371/journal.pone.0234059 2021-06-25T17:57:34Z Trawl-caught Atlantic cod (Gadus morhua) often yield highly variable fillet quality that may be related to capture stress. To investigate mechanisms involved in causing variable quality, commercial-sized (3.5±0.9 kg) Atlantic cod were swum to exhaustion in a large swim tunnel and subsequently exposed to extreme crowding (736±50 kg m -3 ) for 0, 1 or 3 hours in an experimental cod-end. The fish were then recuperated for 0, 3 or 6 hours in a net pen prior to slaughter to assess the possibility to reverse the reduced fillet quality. We found that exhaustive swimming and crowding were associated with increased metabolic stress, as indicated by increased plasma cortisol, blood lactate and blood haematocrit levels, accompanied by reduced quality of the fillets due to increased visual redness and lower initial muscle pH. The observed negative effects of exhaustive swimming and crowding were only to a small degree reversed within 6 hours of recuperation. The results from this study suggest that exhaustive swimming followed by extreme crowding can reduce fillet quality, as measured by fillet redness and muscle pH, and contribute to the variable fillet quality seen in trawl-caught Atlantic cod. Recuperation for more than six hours may be required to reverse these effects. Article in Journal/Newspaper atlantic cod Gadus morhua University of Tromsø: Munin Open Research Archive Slaughter ENVELOPE(-85.633,-85.633,-78.617,-78.617) PLOS ONE 15 6 e0234059 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Svalheim, Ragnhild Aven Aas-Hansen, Øyvind Heia, Karsten Karlsson-Drangsholt, Anders Olsen, Stein Harris Johnsen, Helge K. Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua) |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
description |
Trawl-caught Atlantic cod (Gadus morhua) often yield highly variable fillet quality that may be related to capture stress. To investigate mechanisms involved in causing variable quality, commercial-sized (3.5±0.9 kg) Atlantic cod were swum to exhaustion in a large swim tunnel and subsequently exposed to extreme crowding (736±50 kg m -3 ) for 0, 1 or 3 hours in an experimental cod-end. The fish were then recuperated for 0, 3 or 6 hours in a net pen prior to slaughter to assess the possibility to reverse the reduced fillet quality. We found that exhaustive swimming and crowding were associated with increased metabolic stress, as indicated by increased plasma cortisol, blood lactate and blood haematocrit levels, accompanied by reduced quality of the fillets due to increased visual redness and lower initial muscle pH. The observed negative effects of exhaustive swimming and crowding were only to a small degree reversed within 6 hours of recuperation. The results from this study suggest that exhaustive swimming followed by extreme crowding can reduce fillet quality, as measured by fillet redness and muscle pH, and contribute to the variable fillet quality seen in trawl-caught Atlantic cod. Recuperation for more than six hours may be required to reverse these effects. |
format |
Article in Journal/Newspaper |
author |
Svalheim, Ragnhild Aven Aas-Hansen, Øyvind Heia, Karsten Karlsson-Drangsholt, Anders Olsen, Stein Harris Johnsen, Helge K. |
author_facet |
Svalheim, Ragnhild Aven Aas-Hansen, Øyvind Heia, Karsten Karlsson-Drangsholt, Anders Olsen, Stein Harris Johnsen, Helge K. |
author_sort |
Svalheim, Ragnhild Aven |
title |
Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua) |
title_short |
Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua) |
title_full |
Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua) |
title_fullStr |
Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua) |
title_full_unstemmed |
Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua) |
title_sort |
simulated trawling: exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught atlantic cod (gadus morhua) |
publisher |
Public Library of Science |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/18923 https://doi.org/10.1371/journal.pone.0234059 |
long_lat |
ENVELOPE(-85.633,-85.633,-78.617,-78.617) |
geographic |
Slaughter |
geographic_facet |
Slaughter |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
PLOS ONE info:eu-repo/grantAgreement/RCN/SFI/203477/Norway/CRISP - Centre for Research-based Innovation in Sustainable Fish Capture and Processing Technology// Svalheim, Aas-Hansen, Heia, Karlsson-Drangsholt, Olsen, Johnsen. Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua). PLOS ONE. 2020;15:e0234059(6):1-15 FRIDAID 1819761 doi:10.1371/journal.pone.0234059 1932-6203 https://hdl.handle.net/10037/18923 |
op_rights |
openAccess Copyright 2020 The Author(s) |
op_doi |
https://doi.org/10.1371/journal.pone.0234059 |
container_title |
PLOS ONE |
container_volume |
15 |
container_issue |
6 |
container_start_page |
e0234059 |
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1766357355694391296 |