Relations between mercury, methyl-mercury and selenium in tissues of Octopus vulgaris from the Portuguese Coast

Raimundo, Joana; Vale, Carlos; Canário, João; Branco, Vasco; Moura, Isabel

Relations between mercury, methyl-mercury and selenium in tissues of Octopus vulgaris from the Portuguese Coast

2010

Raimundo, Joana | Vale, Carlos | Canário, João | Branco, Vasco | Moura, Isabel

Mercury, methyl-mercury (MeHg) and selenium were determined in digestive gland and mantle of Octopus vulgaris, from three areas of the Portuguese coast. To our knowledge these are the first data on MeHg in cephalopods. Concentrations were higher in the digestive gland and percentage of MeHg in mantle. Enhanced Hg and MeHg levels were obtained in digestive gland of specimens from Olhão (3.1-7.4 and 2.0–5.0 μg g-1, respectively). Differences between areas may be partially related to Hg availability. Relationships between concentrations in mantle and digestive gland pointed to proportional increases of Hg and MeHg in tissues of specimens from Matosinhos and Cascais, but relatively constant values in mantle of individuals from Olhão (higher contamination). Se:Hg molar ratio in digestive gland was 32 and 30 in octopus from Matosinhos and Cascais, respectively, and 5.4 from Olhão. The proximity to the unit suggests demethylation as response to elevated MeHg levels in digestive gland.

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Mots clés AGROVOC

analysis animals chemistry environmental monitoring mercury mercury metabolism methods octopus vulgaris pharmacokinetics portugal selenium selenium tissue distribution

Informations bibliographiques

Publié dans

Environmental pollution

Volume 158 Numéro 6 Pagination 2094 - 2100 ISSN 0269-7491

Editeur

Elsevier Science Ltd

D'autres materias

Methylmercury compounds; Water pollutants; Chemical; Octopodiformes

Langue

anglais

Note

In the special section: advances of air pollution science: from forest decline to multiple-stress effects on forest ecosystem services / edited by marcus schaub, rainer matyssek and gerhard wieser.

Paper presented at the international conference on air polllution and climate change at contrasting altitude and latitude, held september 7-12, 2009, murten, switzerland.

Includes references

Type

Text; Journal Article

Sur AGRIS depuis: 2024-02-27

Format: MODS

Fournisseur de données

Cette notice bibliographique a été fournie par National Agricultural Library

Découvrez la collection de ce fournisseur de données dans AGRIS

Liens

DOI http://dx.doi.org/10.1016/j.envpol.2010.03.005

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