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Selenium and Mercury Interactions in Apex Predators from the Gulf of Trieste (Northern Adriatic Sea)

Since the environmental levels of selenium (Se) can moderate the bioaccumulation and toxicity of mercury (Hg) in marine organisms, their interactions were studied in seawater, sediments, plankton and the benthic (Bull ray Pteromylaeus bovinus, Eagle ray Myliobatis aquila) and the pelagic (Pelagic st...

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Autores principales: Faganeli, Jadran, Falnoga, Ingrid, Horvat, Milena, Klun, Katja, Lipej, Lovrenc, Mazej, Darja
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5872696/
https://www.ncbi.nlm.nih.gov/pubmed/29495604
http://dx.doi.org/10.3390/nu10030278
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author Faganeli, Jadran
Falnoga, Ingrid
Horvat, Milena
Klun, Katja
Lipej, Lovrenc
Mazej, Darja
author_facet Faganeli, Jadran
Falnoga, Ingrid
Horvat, Milena
Klun, Katja
Lipej, Lovrenc
Mazej, Darja
author_sort Faganeli, Jadran
collection PubMed
description Since the environmental levels of selenium (Se) can moderate the bioaccumulation and toxicity of mercury (Hg) in marine organisms, their interactions were studied in seawater, sediments, plankton and the benthic (Bull ray Pteromylaeus bovinus, Eagle ray Myliobatis aquila) and the pelagic (Pelagic stingray Dasyiatis violacea) rays, as apex predators in the Gulf of Trieste (Northern Adriatic Sea). Male and female rays showed no difference in the Se contents in muscle tissue. Pelagic species contained higher Se levels in muscle but slightly lower levels in the livers of both genders. The Hg/Se ratios in seawater dissolved and colloidal fractions, plankton and sediment were <0.5, while those in particulate matter were <1.3. In benthic ray species, a parallel increase in Se and Hg in muscle was observed, so that an increased in Hg (MeHg) bioaccumulation results in Se coaccumulation. The Hg/Se ratios (molar) in muscle and liver of pelagic and benthic rays were <1.4 and <0.7, respectively. The low levels of Hg in muscle and liver in all the ray species corresponded to low Hg/Se ratios and increases in muscle and liver to 1 at 7 µg/g, dry weight (dw) and 5 µg/g dw, respectively, i.e., about 1.6 µg/g wet weight (ww).
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spelling pubmed-58726962018-03-30 Selenium and Mercury Interactions in Apex Predators from the Gulf of Trieste (Northern Adriatic Sea) Faganeli, Jadran Falnoga, Ingrid Horvat, Milena Klun, Katja Lipej, Lovrenc Mazej, Darja Nutrients Article Since the environmental levels of selenium (Se) can moderate the bioaccumulation and toxicity of mercury (Hg) in marine organisms, their interactions were studied in seawater, sediments, plankton and the benthic (Bull ray Pteromylaeus bovinus, Eagle ray Myliobatis aquila) and the pelagic (Pelagic stingray Dasyiatis violacea) rays, as apex predators in the Gulf of Trieste (Northern Adriatic Sea). Male and female rays showed no difference in the Se contents in muscle tissue. Pelagic species contained higher Se levels in muscle but slightly lower levels in the livers of both genders. The Hg/Se ratios in seawater dissolved and colloidal fractions, plankton and sediment were <0.5, while those in particulate matter were <1.3. In benthic ray species, a parallel increase in Se and Hg in muscle was observed, so that an increased in Hg (MeHg) bioaccumulation results in Se coaccumulation. The Hg/Se ratios (molar) in muscle and liver of pelagic and benthic rays were <1.4 and <0.7, respectively. The low levels of Hg in muscle and liver in all the ray species corresponded to low Hg/Se ratios and increases in muscle and liver to 1 at 7 µg/g, dry weight (dw) and 5 µg/g dw, respectively, i.e., about 1.6 µg/g wet weight (ww). MDPI 2018-02-28 /pmc/articles/PMC5872696/ /pubmed/29495604 http://dx.doi.org/10.3390/nu10030278 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Faganeli, Jadran
Falnoga, Ingrid
Horvat, Milena
Klun, Katja
Lipej, Lovrenc
Mazej, Darja
Selenium and Mercury Interactions in Apex Predators from the Gulf of Trieste (Northern Adriatic Sea)
title Selenium and Mercury Interactions in Apex Predators from the Gulf of Trieste (Northern Adriatic Sea)
title_full Selenium and Mercury Interactions in Apex Predators from the Gulf of Trieste (Northern Adriatic Sea)
title_fullStr Selenium and Mercury Interactions in Apex Predators from the Gulf of Trieste (Northern Adriatic Sea)
title_full_unstemmed Selenium and Mercury Interactions in Apex Predators from the Gulf of Trieste (Northern Adriatic Sea)
title_short Selenium and Mercury Interactions in Apex Predators from the Gulf of Trieste (Northern Adriatic Sea)
title_sort selenium and mercury interactions in apex predators from the gulf of trieste (northern adriatic sea)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5872696/
https://www.ncbi.nlm.nih.gov/pubmed/29495604
http://dx.doi.org/10.3390/nu10030278
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