Mercury levels in Southern Ocean squid: Variability over the last decade
International audience The concentrations of total and proportions of organic mercury were measured in tissues of 355 individuals of 8 species of Southern Ocean squid (Alluroteuthis antarcticus, Bathyteuthis abyssicola, Filippovia knipovitchi, Galiteuthis glacialis, Gonatus antarcticus, Kondakovia l...
Published in: | Chemosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2020
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Online Access: | https://hal.science/hal-02340409 https://hal.science/hal-02340409/document https://hal.science/hal-02340409/file/Seco%20et%20al%202020%20CHEMO.pdf https://doi.org/10.1016/j.chemosphere.2019.124785 |
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ftunivnantes:oai:HAL:hal-02340409v1 2023-05-15T13:31:54+02:00 Mercury levels in Southern Ocean squid: Variability over the last decade Seco, José Xavier, José Brierley, Andrew, Bustamante, Paco Coelho, Joao Gregory, Susan Fielding, Sophie Pardal, Miguel Pereira, Bárbara Stowasser, Gabriele Tarling, Geraint Pereira, Eduarda CESAM & Department of Chemistry Universidade de Aveiro Scottish Oceans Institute University of St Andrews Scotland 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) CESAM and Department of Biology University of Minho Braga Government of South Georgia & the South Sandwich Islands Centre for Functional ecology University of Coimbra Portugal (UC) 2020-01 https://hal.science/hal-02340409 https://hal.science/hal-02340409/document https://hal.science/hal-02340409/file/Seco%20et%20al%202020%20CHEMO.pdf https://doi.org/10.1016/j.chemosphere.2019.124785 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.chemosphere.2019.124785 hal-02340409 https://hal.science/hal-02340409 https://hal.science/hal-02340409/document https://hal.science/hal-02340409/file/Seco%20et%20al%202020%20CHEMO.pdf doi:10.1016/j.chemosphere.2019.124785 info:eu-repo/semantics/OpenAccess ISSN: 0045-6535 Chemosphere https://hal.science/hal-02340409 Chemosphere, 2020, 239, pp.124785. ⟨10.1016/j.chemosphere.2019.124785⟩ Organic mercury Muscle Gills Digestive gland Tissue allocation Temporal trends [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology info:eu-repo/semantics/article Journal articles 2020 ftunivnantes https://doi.org/10.1016/j.chemosphere.2019.124785 2023-03-08T05:08:37Z International audience The concentrations of total and proportions of organic mercury were measured in tissues of 355 individuals of 8 species of Southern Ocean squid (Alluroteuthis antarcticus, Bathyteuthis abyssicola, Filippovia knipovitchi, Galiteuthis glacialis, Gonatus antarcticus, Kondakovia longimana, Psychroteuthis glacialis and Slosarczykovia circumantarctica). Squid were caught around South Georgia (Scotia Sea) during 5 cruises, between the austral summers of 2006/07 to 2016/17 to evaluate temporal changes in bioaccumulation and tissue partitioning. Total mercury concentrations varied between 4 ng g-1 and 804 ng g-1 among all tissues. Net accumulation of mercury in muscle with size was observed in A. antarcticus, B. abyssicola and P. glacialis, but no relationship was found for S. circumantarctica and lower concentrations were observed in larger individuals of G. glacialis. Muscle tissues had the highest mercury concentrations in the majority of species, except for F. knipovitchi for which the digestive gland contained highest concentrations. In terms of the percentage of organic mercury relative to total mercury in tissues, muscle always contained the highest values (67% to 97%), followed by the digestive gland (22% to 38%). Lowest organic mercury percentages were found consistently in the gills (9% to 19%), suggesting only low levels of incorporation through the dissolved pathway and/or a limited redistribution of dietary organic mercury towards this tissue. Overall, results are indicative of a decreasing trend of mercury concentrations in the majority of analysed species over the last decade. As cephalopods are an important Southern Ocean trophic link between primary consumers and top predators, these changes suggest decreasing mercury levels in lower trophic levels (i.e. squid prey) and an alleviation of the mercury burden on higher predators that consume squid. Article in Journal/Newspaper Antarc* antarcticus Scotia Sea Southern Ocean Université de Nantes: HAL-UNIV-NANTES Austral Scotia Sea Southern Ocean Chemosphere 239 124785 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Organic mercury Muscle Gills Digestive gland Tissue allocation Temporal trends [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
spellingShingle |
Organic mercury Muscle Gills Digestive gland Tissue allocation Temporal trends [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology Seco, José Xavier, José Brierley, Andrew, Bustamante, Paco Coelho, Joao Gregory, Susan Fielding, Sophie Pardal, Miguel Pereira, Bárbara Stowasser, Gabriele Tarling, Geraint Pereira, Eduarda Mercury levels in Southern Ocean squid: Variability over the last decade |
topic_facet |
Organic mercury Muscle Gills Digestive gland Tissue allocation Temporal trends [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
description |
International audience The concentrations of total and proportions of organic mercury were measured in tissues of 355 individuals of 8 species of Southern Ocean squid (Alluroteuthis antarcticus, Bathyteuthis abyssicola, Filippovia knipovitchi, Galiteuthis glacialis, Gonatus antarcticus, Kondakovia longimana, Psychroteuthis glacialis and Slosarczykovia circumantarctica). Squid were caught around South Georgia (Scotia Sea) during 5 cruises, between the austral summers of 2006/07 to 2016/17 to evaluate temporal changes in bioaccumulation and tissue partitioning. Total mercury concentrations varied between 4 ng g-1 and 804 ng g-1 among all tissues. Net accumulation of mercury in muscle with size was observed in A. antarcticus, B. abyssicola and P. glacialis, but no relationship was found for S. circumantarctica and lower concentrations were observed in larger individuals of G. glacialis. Muscle tissues had the highest mercury concentrations in the majority of species, except for F. knipovitchi for which the digestive gland contained highest concentrations. In terms of the percentage of organic mercury relative to total mercury in tissues, muscle always contained the highest values (67% to 97%), followed by the digestive gland (22% to 38%). Lowest organic mercury percentages were found consistently in the gills (9% to 19%), suggesting only low levels of incorporation through the dissolved pathway and/or a limited redistribution of dietary organic mercury towards this tissue. Overall, results are indicative of a decreasing trend of mercury concentrations in the majority of analysed species over the last decade. As cephalopods are an important Southern Ocean trophic link between primary consumers and top predators, these changes suggest decreasing mercury levels in lower trophic levels (i.e. squid prey) and an alleviation of the mercury burden on higher predators that consume squid. |
author2 |
CESAM & Department of Chemistry Universidade de Aveiro Scottish Oceans Institute University of St Andrews Scotland 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) CESAM and Department of Biology University of Minho Braga Government of South Georgia & the South Sandwich Islands Centre for Functional ecology University of Coimbra Portugal (UC) |
format |
Article in Journal/Newspaper |
author |
Seco, José Xavier, José Brierley, Andrew, Bustamante, Paco Coelho, Joao Gregory, Susan Fielding, Sophie Pardal, Miguel Pereira, Bárbara Stowasser, Gabriele Tarling, Geraint Pereira, Eduarda |
author_facet |
Seco, José Xavier, José Brierley, Andrew, Bustamante, Paco Coelho, Joao Gregory, Susan Fielding, Sophie Pardal, Miguel Pereira, Bárbara Stowasser, Gabriele Tarling, Geraint Pereira, Eduarda |
author_sort |
Seco, José |
title |
Mercury levels in Southern Ocean squid: Variability over the last decade |
title_short |
Mercury levels in Southern Ocean squid: Variability over the last decade |
title_full |
Mercury levels in Southern Ocean squid: Variability over the last decade |
title_fullStr |
Mercury levels in Southern Ocean squid: Variability over the last decade |
title_full_unstemmed |
Mercury levels in Southern Ocean squid: Variability over the last decade |
title_sort |
mercury levels in southern ocean squid: variability over the last decade |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02340409 https://hal.science/hal-02340409/document https://hal.science/hal-02340409/file/Seco%20et%20al%202020%20CHEMO.pdf https://doi.org/10.1016/j.chemosphere.2019.124785 |
geographic |
Austral Scotia Sea Southern Ocean |
geographic_facet |
Austral Scotia Sea Southern Ocean |
genre |
Antarc* antarcticus Scotia Sea Southern Ocean |
genre_facet |
Antarc* antarcticus Scotia Sea Southern Ocean |
op_source |
ISSN: 0045-6535 Chemosphere https://hal.science/hal-02340409 Chemosphere, 2020, 239, pp.124785. ⟨10.1016/j.chemosphere.2019.124785⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.chemosphere.2019.124785 hal-02340409 https://hal.science/hal-02340409 https://hal.science/hal-02340409/document https://hal.science/hal-02340409/file/Seco%20et%20al%202020%20CHEMO.pdf doi:10.1016/j.chemosphere.2019.124785 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.chemosphere.2019.124785 |
container_title |
Chemosphere |
container_volume |
239 |
container_start_page |
124785 |
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1766022348028248064 |