Main drivers of mercury levels in Southern Ocean Lantern fish Myctophidae
International audience Myctophids are the most abundant fish group in the Southern Ocean pelagic ecosystem and are an important link in the Antarctic marine food web. Due to their major ecological role, evaluating the level of mercury (Hg) contamination in myctophids is important as a step towards u...
Published in: | Environmental Pollution |
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Main Authors: | , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.science/hal-02570100 https://hal.science/hal-02570100/document https://hal.science/hal-02570100/file/Seco%20et%20al%202020%20ENPO.pdf https://doi.org/10.1016/j.envpol.2020.114711 |
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ftunivrochelle:oai:HAL:hal-02570100v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
mesopelagic fish Antarctic Trace element metal bioaccumulation [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
mesopelagic fish Antarctic Trace element metal bioaccumulation [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Seco, José Xavier, José Bustamante, Paco Coelho, Joao Saunders, Ryan, A Ferreira, Nicole Fielding, Sophie Pardal, Miguel Stowasser, Gabriele Viana, Thainara Tarling, Geraint Pereira, Eduarda Brierley, Andrew, S Main drivers of mercury levels in Southern Ocean Lantern fish Myctophidae |
topic_facet |
mesopelagic fish Antarctic Trace element metal bioaccumulation [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Myctophids are the most abundant fish group in the Southern Ocean pelagic ecosystem and are an important link in the Antarctic marine food web. Due to their major ecological role, evaluating the level of mercury (Hg) contamination in myctophids is important as a step towards understanding the trophic pathway of this contaminant. The concentrations of total Hg were determined in muscle, gill, heart and liver tissue of 9 myctophid species to quantify tissue partitioning variability between species. Organic Hg concentration and proportion in muscle was also determined. Hg concentrations were higher in the liver and heart than in muscle and gills, but the proportion of organic Hg was almost 100% in muscle, indicating that the main uptake route for Hg is through the diet. Most of the species analysed have similar vertical and horizontal distributions, and similar feeding modes and prey. Geographical and temporal variability of Hg concentrations was examined using samples from 3 different years (2007/08, 2015/16 and 2016/17) and 2 locations (South Georgia and South Orkneys Islands). Our results appear to indicate a decreasing trend in Hg contamination over the last decade, particularly gill tissue, which is in agreement with a previous study on squid from the same region. There was no significant variability in Hg concentration between the different sampling locations. Hg levels were consistent with values reported previously for myctophids around the world, indicating low global-scale geographic variability. A positive relationship between fish size and Hg concentration was found for most species, with the exception of Electrona antarctica females, which may be explained through Hg elimination by egg laying. We estimate that myctophids collectively comprise a Southern Ocean mercury ‘reserve’ of 1.82 metric tonnes. |
author2 |
Marine and environmental research centre - IMAR-CMA (Coimbra, Portugal) University of Coimbra Portugal (UC) Pelagic Ecology Research Group, British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Marine and Environmental Sciences Centre (MARE UC) Universidade de Coimbra Coimbra LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Institut universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) CESAM and Department of Biology Universidade de Aveiro Government of South Georgia and the South Sandwich Islands CESAM & Department of Chemistry Centre for Functional ecology Scottish Oceans Institute University of St Andrews Scotland |
format |
Article in Journal/Newspaper |
author |
Seco, José Xavier, José Bustamante, Paco Coelho, Joao Saunders, Ryan, A Ferreira, Nicole Fielding, Sophie Pardal, Miguel Stowasser, Gabriele Viana, Thainara Tarling, Geraint Pereira, Eduarda Brierley, Andrew, S |
author_facet |
Seco, José Xavier, José Bustamante, Paco Coelho, Joao Saunders, Ryan, A Ferreira, Nicole Fielding, Sophie Pardal, Miguel Stowasser, Gabriele Viana, Thainara Tarling, Geraint Pereira, Eduarda Brierley, Andrew, S |
author_sort |
Seco, José |
title |
Main drivers of mercury levels in Southern Ocean Lantern fish Myctophidae |
title_short |
Main drivers of mercury levels in Southern Ocean Lantern fish Myctophidae |
title_full |
Main drivers of mercury levels in Southern Ocean Lantern fish Myctophidae |
title_fullStr |
Main drivers of mercury levels in Southern Ocean Lantern fish Myctophidae |
title_full_unstemmed |
Main drivers of mercury levels in Southern Ocean Lantern fish Myctophidae |
title_sort |
main drivers of mercury levels in southern ocean lantern fish myctophidae |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02570100 https://hal.science/hal-02570100/document https://hal.science/hal-02570100/file/Seco%20et%20al%202020%20ENPO.pdf https://doi.org/10.1016/j.envpol.2020.114711 |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
ISSN: 0269-7491 EISSN: 1873-6424 Environmental Pollution https://hal.science/hal-02570100 Environmental Pollution, 2020, 264C (114711), ⟨10.1016/j.envpol.2020.114711⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.envpol.2020.114711 hal-02570100 https://hal.science/hal-02570100 https://hal.science/hal-02570100/document https://hal.science/hal-02570100/file/Seco%20et%20al%202020%20ENPO.pdf doi:10.1016/j.envpol.2020.114711 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.envpol.2020.114711 |
container_title |
Environmental Pollution |
container_volume |
264 |
container_start_page |
114711 |
_version_ |
1799485812060979200 |
spelling |
ftunivrochelle:oai:HAL:hal-02570100v1 2024-05-19T07:30:22+00:00 Main drivers of mercury levels in Southern Ocean Lantern fish Myctophidae Seco, José Xavier, José Bustamante, Paco Coelho, Joao Saunders, Ryan, A Ferreira, Nicole Fielding, Sophie Pardal, Miguel Stowasser, Gabriele Viana, Thainara Tarling, Geraint Pereira, Eduarda Brierley, Andrew, S Marine and environmental research centre - IMAR-CMA (Coimbra, Portugal) University of Coimbra Portugal (UC) Pelagic Ecology Research Group, British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Marine and Environmental Sciences Centre (MARE UC) Universidade de Coimbra Coimbra LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Institut universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) CESAM and Department of Biology Universidade de Aveiro Government of South Georgia and the South Sandwich Islands CESAM & Department of Chemistry Centre for Functional ecology Scottish Oceans Institute University of St Andrews Scotland 2020-09 https://hal.science/hal-02570100 https://hal.science/hal-02570100/document https://hal.science/hal-02570100/file/Seco%20et%20al%202020%20ENPO.pdf https://doi.org/10.1016/j.envpol.2020.114711 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.envpol.2020.114711 hal-02570100 https://hal.science/hal-02570100 https://hal.science/hal-02570100/document https://hal.science/hal-02570100/file/Seco%20et%20al%202020%20ENPO.pdf doi:10.1016/j.envpol.2020.114711 info:eu-repo/semantics/OpenAccess ISSN: 0269-7491 EISSN: 1873-6424 Environmental Pollution https://hal.science/hal-02570100 Environmental Pollution, 2020, 264C (114711), ⟨10.1016/j.envpol.2020.114711⟩ mesopelagic fish Antarctic Trace element metal bioaccumulation [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2020 ftunivrochelle https://doi.org/10.1016/j.envpol.2020.114711 2024-04-24T00:36:21Z International audience Myctophids are the most abundant fish group in the Southern Ocean pelagic ecosystem and are an important link in the Antarctic marine food web. Due to their major ecological role, evaluating the level of mercury (Hg) contamination in myctophids is important as a step towards understanding the trophic pathway of this contaminant. The concentrations of total Hg were determined in muscle, gill, heart and liver tissue of 9 myctophid species to quantify tissue partitioning variability between species. Organic Hg concentration and proportion in muscle was also determined. Hg concentrations were higher in the liver and heart than in muscle and gills, but the proportion of organic Hg was almost 100% in muscle, indicating that the main uptake route for Hg is through the diet. Most of the species analysed have similar vertical and horizontal distributions, and similar feeding modes and prey. Geographical and temporal variability of Hg concentrations was examined using samples from 3 different years (2007/08, 2015/16 and 2016/17) and 2 locations (South Georgia and South Orkneys Islands). Our results appear to indicate a decreasing trend in Hg contamination over the last decade, particularly gill tissue, which is in agreement with a previous study on squid from the same region. There was no significant variability in Hg concentration between the different sampling locations. Hg levels were consistent with values reported previously for myctophids around the world, indicating low global-scale geographic variability. A positive relationship between fish size and Hg concentration was found for most species, with the exception of Electrona antarctica females, which may be explained through Hg elimination by egg laying. We estimate that myctophids collectively comprise a Southern Ocean mercury ‘reserve’ of 1.82 metric tonnes. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean HAL - Université de La Rochelle Environmental Pollution 264 114711 |