Associations between vitamins A and E and legacy POP levels in highly contaminated Greenland sharks (Somniosus microcephalus)
The Greenland shark (Somniosus microcephalus) is a top predator in Arctic marine ecosystems, and the species bioaccumulates high levels of biomagnifying persistent organic pollutants (POP). In teleost fish, as well as in marine mammals and seabirds, legacy POP have been shown to interfere with the v...
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1381 2023-06-11T04:08:01+02:00 Associations between vitamins A and E and legacy POP levels in highly contaminated Greenland sharks (Somniosus microcephalus) Molde, Kristine Ciesielski, Tomasz M. Fisk, Aaron T. Lydersen, Christian Kovacs, Kit M. Sørmo, Eugen G. Jenssen, Bjørn M. 2013-01-01T08:00:00Z https://scholar.uwindsor.ca/glierpub/379 https://doi.org/10.1016/j.scitotenv.2012.10.012 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/379 doi:10.1016/j.scitotenv.2012.10.012 https://doi.org/10.1016/j.scitotenv.2012.10.012 Great Lakes Institute for Environmental Research Publications Arctic Pollution Retinoids Sharks Tocopherol text 2013 ftunivwindsor https://doi.org/10.1016/j.scitotenv.2012.10.012 2023-05-06T19:10:50Z The Greenland shark (Somniosus microcephalus) is a top predator in Arctic marine ecosystems, and the species bioaccumulates high levels of biomagnifying persistent organic pollutants (POP). In teleost fish, as well as in marine mammals and seabirds, legacy POP have been shown to interfere with the vitamin A and vitamin E homeostasis. Thus, there is the potential for negative health effects from these legacy compounds in Greenland sharks. In the present study we examined associations among plasma levels of legacy POP and plasma vitamin A (retinol [RET], retinyl palmitate [RPA]) and vitamin E (α-tocopherol [α-TOC]) in Greenland sharks from Svalbard, Norway. Plasma levels of POP were on average higher than the hepatic levels previously reported in Greenland sharks from Iceland and Davis Strait, Canada. Levels were also higher than the plasma levels reported in Arctic marine mammals. DDTs (mean 8069. ng/g l.w., range: 900-59,707. ng/g l.w.), PCBs (mean 5766. ng/g l.w., range 1344-16,106. ng/g l.w.) and chlordanes (mean 1551. ng/g l.w., range: 323-5756. ng/g l.w.) had the highest concentrations among the POP groups studied. There were significant inverse relationships between RET concentrations and the concentrations of the dioxin-like compounds PCB-118 and PCB-156/171, and the non-dioxin-like compounds PCB-99 and PCB-128. There were also significant inverse relationships between RPA and 18 of the 38 POP compounds measured. Furthermore, there were significant positive associations between α-TOC and 13 of the 27 PCB congeners. The study suggests that these vitamin systems can be affected by the relatively high POP concentrations exhibited by Greenland sharks at Svalbard. However, the present study is correlative and thus the potential interplay between POP and vitamin dynamics of Greenland sharks must be interpreted cautiously, pending further research on this issue among elasmobranchs. © 2012 Elsevier B.V. Text Arctic marine mammals Arctic Arctic pollution Davis Strait Greenland Iceland Somniosus microcephalus Svalbard University of Windsor, Ontario: Scholarship at UWindsor Arctic Svalbard Canada Greenland Norway Science of The Total Environment 442 445 454 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
Arctic Pollution Retinoids Sharks Tocopherol |
spellingShingle |
Arctic Pollution Retinoids Sharks Tocopherol Molde, Kristine Ciesielski, Tomasz M. Fisk, Aaron T. Lydersen, Christian Kovacs, Kit M. Sørmo, Eugen G. Jenssen, Bjørn M. Associations between vitamins A and E and legacy POP levels in highly contaminated Greenland sharks (Somniosus microcephalus) |
topic_facet |
Arctic Pollution Retinoids Sharks Tocopherol |
description |
The Greenland shark (Somniosus microcephalus) is a top predator in Arctic marine ecosystems, and the species bioaccumulates high levels of biomagnifying persistent organic pollutants (POP). In teleost fish, as well as in marine mammals and seabirds, legacy POP have been shown to interfere with the vitamin A and vitamin E homeostasis. Thus, there is the potential for negative health effects from these legacy compounds in Greenland sharks. In the present study we examined associations among plasma levels of legacy POP and plasma vitamin A (retinol [RET], retinyl palmitate [RPA]) and vitamin E (α-tocopherol [α-TOC]) in Greenland sharks from Svalbard, Norway. Plasma levels of POP were on average higher than the hepatic levels previously reported in Greenland sharks from Iceland and Davis Strait, Canada. Levels were also higher than the plasma levels reported in Arctic marine mammals. DDTs (mean 8069. ng/g l.w., range: 900-59,707. ng/g l.w.), PCBs (mean 5766. ng/g l.w., range 1344-16,106. ng/g l.w.) and chlordanes (mean 1551. ng/g l.w., range: 323-5756. ng/g l.w.) had the highest concentrations among the POP groups studied. There were significant inverse relationships between RET concentrations and the concentrations of the dioxin-like compounds PCB-118 and PCB-156/171, and the non-dioxin-like compounds PCB-99 and PCB-128. There were also significant inverse relationships between RPA and 18 of the 38 POP compounds measured. Furthermore, there were significant positive associations between α-TOC and 13 of the 27 PCB congeners. The study suggests that these vitamin systems can be affected by the relatively high POP concentrations exhibited by Greenland sharks at Svalbard. However, the present study is correlative and thus the potential interplay between POP and vitamin dynamics of Greenland sharks must be interpreted cautiously, pending further research on this issue among elasmobranchs. © 2012 Elsevier B.V. |
format |
Text |
author |
Molde, Kristine Ciesielski, Tomasz M. Fisk, Aaron T. Lydersen, Christian Kovacs, Kit M. Sørmo, Eugen G. Jenssen, Bjørn M. |
author_facet |
Molde, Kristine Ciesielski, Tomasz M. Fisk, Aaron T. Lydersen, Christian Kovacs, Kit M. Sørmo, Eugen G. Jenssen, Bjørn M. |
author_sort |
Molde, Kristine |
title |
Associations between vitamins A and E and legacy POP levels in highly contaminated Greenland sharks (Somniosus microcephalus) |
title_short |
Associations between vitamins A and E and legacy POP levels in highly contaminated Greenland sharks (Somniosus microcephalus) |
title_full |
Associations between vitamins A and E and legacy POP levels in highly contaminated Greenland sharks (Somniosus microcephalus) |
title_fullStr |
Associations between vitamins A and E and legacy POP levels in highly contaminated Greenland sharks (Somniosus microcephalus) |
title_full_unstemmed |
Associations between vitamins A and E and legacy POP levels in highly contaminated Greenland sharks (Somniosus microcephalus) |
title_sort |
associations between vitamins a and e and legacy pop levels in highly contaminated greenland sharks (somniosus microcephalus) |
publisher |
Scholarship at UWindsor |
publishDate |
2013 |
url |
https://scholar.uwindsor.ca/glierpub/379 https://doi.org/10.1016/j.scitotenv.2012.10.012 |
geographic |
Arctic Svalbard Canada Greenland Norway |
geographic_facet |
Arctic Svalbard Canada Greenland Norway |
genre |
Arctic marine mammals Arctic Arctic pollution Davis Strait Greenland Iceland Somniosus microcephalus Svalbard |
genre_facet |
Arctic marine mammals Arctic Arctic pollution Davis Strait Greenland Iceland Somniosus microcephalus Svalbard |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/379 doi:10.1016/j.scitotenv.2012.10.012 https://doi.org/10.1016/j.scitotenv.2012.10.012 |
op_doi |
https://doi.org/10.1016/j.scitotenv.2012.10.012 |
container_title |
Science of The Total Environment |
container_volume |
442 |
container_start_page |
445 |
op_container_end_page |
454 |
_version_ |
1768381116873441280 |