Long-term investigation of the ‘soft flesh’ condition in Northeast Atlantic mackerel induced by the myxosporean parasite Kudoa thyrsites (Cnidaria, Myxozoa): Temporal trends and new molecular epidemiological observations
Northeast Atlantic (NEA) mackerel (Scomber scombrus, Scombridae) represents an economically important target for the Norwegian pelagic fishing industry. Despite the commercial significance of NEA mackerel, little is known about the infections with the myxosporean parasite Kudoa thyrsites (Kudoidae)....
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ftunivbergen:oai:bora.uib.no:11250/3001186 2023-05-15T17:41:20+02:00 Long-term investigation of the ‘soft flesh’ condition in Northeast Atlantic mackerel induced by the myxosporean parasite Kudoa thyrsites (Cnidaria, Myxozoa): Temporal trends and new molecular epidemiological observations Giulietti, Lucilla Karlsbakk, Egil Erlingsson Cipriani, Paolo Bao Dominguez, Miguel Storesund, Julia Endresen Marathe, Nachiket Levsen, Arne 2022 application/pdf https://hdl.handle.net/11250/3001186 https://doi.org/10.1016/j.fishres.2021.106221 eng eng Elsevier urn:issn:0165-7836 https://hdl.handle.net/11250/3001186 https://doi.org/10.1016/j.fishres.2021.106221 cristin:1988283 Fisheries Research. 2022, 248, 106221. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 The Author(s) 106221 Fisheries Research 248 Journal article Peer reviewed 2022 ftunivbergen https://doi.org/10.1016/j.fishres.2021.106221 2023-03-14T17:41:52Z Northeast Atlantic (NEA) mackerel (Scomber scombrus, Scombridae) represents an economically important target for the Norwegian pelagic fishing industry. Despite the commercial significance of NEA mackerel, little is known about the infections with the myxosporean parasite Kudoa thyrsites (Kudoidae). The parasite may cause post-mortem myoliquefaction of the fish skeletal muscle and therefore reduce the quality of the fish product. In this study, we examined ‘soft flesh’ occurrence in commercial size groups of NEA ‘autumn mackerel’ caught between 2007 and 2020, and investigated the prevalence and density of K. thyrsites (qPCR) and how they related to the occurrence of ‘soft flesh’. The present study is the first long-term investigation of the occurrence of K. thyrsites-induced ‘soft flesh’ in NEA mackerel. After appearing stable for over a decade, the ‘soft flesh’ occurrence increased three- to six-fold in 2019 and 2020. This increase, together with the findings that ‘soft flesh’ seems primarily to affect the commercially most valuable mackerel size group (>400 g), may have important implications for the fishing industry and the fishery management. Molecular analysis (qPCR) suggests that the prevalence of K. thyrsites is substantially higher than ‘soft flesh’ occurrence. The majority (87.4%, n = 76/87) of infected mackerel did not develop ‘soft flesh’ and only individuals with high parasite density in the musculature (12.6%, n = 11/87) showed the condition. Therefore, qPCR analyses should be used for estimating the prevalence of K. thyrsites in fish. The method may also be used to assess the risk of NEA mackerel to develop post-mortem ‘soft flesh’. publishedVersion Article in Journal/Newspaper Northeast Atlantic University of Bergen: Bergen Open Research Archive (BORA-UiB) Fisheries Research 248 106221 |
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Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Northeast Atlantic (NEA) mackerel (Scomber scombrus, Scombridae) represents an economically important target for the Norwegian pelagic fishing industry. Despite the commercial significance of NEA mackerel, little is known about the infections with the myxosporean parasite Kudoa thyrsites (Kudoidae). The parasite may cause post-mortem myoliquefaction of the fish skeletal muscle and therefore reduce the quality of the fish product. In this study, we examined ‘soft flesh’ occurrence in commercial size groups of NEA ‘autumn mackerel’ caught between 2007 and 2020, and investigated the prevalence and density of K. thyrsites (qPCR) and how they related to the occurrence of ‘soft flesh’. The present study is the first long-term investigation of the occurrence of K. thyrsites-induced ‘soft flesh’ in NEA mackerel. After appearing stable for over a decade, the ‘soft flesh’ occurrence increased three- to six-fold in 2019 and 2020. This increase, together with the findings that ‘soft flesh’ seems primarily to affect the commercially most valuable mackerel size group (>400 g), may have important implications for the fishing industry and the fishery management. Molecular analysis (qPCR) suggests that the prevalence of K. thyrsites is substantially higher than ‘soft flesh’ occurrence. The majority (87.4%, n = 76/87) of infected mackerel did not develop ‘soft flesh’ and only individuals with high parasite density in the musculature (12.6%, n = 11/87) showed the condition. Therefore, qPCR analyses should be used for estimating the prevalence of K. thyrsites in fish. The method may also be used to assess the risk of NEA mackerel to develop post-mortem ‘soft flesh’. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Giulietti, Lucilla Karlsbakk, Egil Erlingsson Cipriani, Paolo Bao Dominguez, Miguel Storesund, Julia Endresen Marathe, Nachiket Levsen, Arne |
spellingShingle |
Giulietti, Lucilla Karlsbakk, Egil Erlingsson Cipriani, Paolo Bao Dominguez, Miguel Storesund, Julia Endresen Marathe, Nachiket Levsen, Arne Long-term investigation of the ‘soft flesh’ condition in Northeast Atlantic mackerel induced by the myxosporean parasite Kudoa thyrsites (Cnidaria, Myxozoa): Temporal trends and new molecular epidemiological observations |
author_facet |
Giulietti, Lucilla Karlsbakk, Egil Erlingsson Cipriani, Paolo Bao Dominguez, Miguel Storesund, Julia Endresen Marathe, Nachiket Levsen, Arne |
author_sort |
Giulietti, Lucilla |
title |
Long-term investigation of the ‘soft flesh’ condition in Northeast Atlantic mackerel induced by the myxosporean parasite Kudoa thyrsites (Cnidaria, Myxozoa): Temporal trends and new molecular epidemiological observations |
title_short |
Long-term investigation of the ‘soft flesh’ condition in Northeast Atlantic mackerel induced by the myxosporean parasite Kudoa thyrsites (Cnidaria, Myxozoa): Temporal trends and new molecular epidemiological observations |
title_full |
Long-term investigation of the ‘soft flesh’ condition in Northeast Atlantic mackerel induced by the myxosporean parasite Kudoa thyrsites (Cnidaria, Myxozoa): Temporal trends and new molecular epidemiological observations |
title_fullStr |
Long-term investigation of the ‘soft flesh’ condition in Northeast Atlantic mackerel induced by the myxosporean parasite Kudoa thyrsites (Cnidaria, Myxozoa): Temporal trends and new molecular epidemiological observations |
title_full_unstemmed |
Long-term investigation of the ‘soft flesh’ condition in Northeast Atlantic mackerel induced by the myxosporean parasite Kudoa thyrsites (Cnidaria, Myxozoa): Temporal trends and new molecular epidemiological observations |
title_sort |
long-term investigation of the ‘soft flesh’ condition in northeast atlantic mackerel induced by the myxosporean parasite kudoa thyrsites (cnidaria, myxozoa): temporal trends and new molecular epidemiological observations |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3001186 https://doi.org/10.1016/j.fishres.2021.106221 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
106221 Fisheries Research 248 |
op_relation |
urn:issn:0165-7836 https://hdl.handle.net/11250/3001186 https://doi.org/10.1016/j.fishres.2021.106221 cristin:1988283 Fisheries Research. 2022, 248, 106221. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.1016/j.fishres.2021.106221 |
container_title |
Fisheries Research |
container_volume |
248 |
container_start_page |
106221 |
_version_ |
1766142826478829568 |