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

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

doi:10.1016/j.envpol.2010.03.005

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

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

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	2094-2100
Number of pages	7
Journal	Environmental Pollution
Volume	158
Issue number	6
DOIs	https://doi.org/10.1016/j.envpol.2010.03.005
Publication status	Published - Jun 2010
Externally published	Yes

Keywords

Cephalopods
Mercury
Methyl-mercury
Portugal
Selenium

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.envpol.2010.03.005

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

abstract = "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 Olh{\~a}o (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 Olh{\~a}o (higher contamination). Se:Hg molar ratio in digestive gland was 32 and 30 in octopus from Matosinhos and Cascais, respectively, and 5.4 from Olh{\~a}o. The proximity to the unit suggests demethylation as response to elevated MeHg levels in digestive gland.",

keywords = "Cephalopods, Mercury, Methyl-mercury, Portugal, Selenium",

author = "Joana Raimundo and Carlos Vale and Jo{\~a}o Can{\'a}rio and Vasco Branco and Isabel Moura",

note = "Funding Information: Joana Raimundo benefits from a PhD fellowship provided by the “Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia” (FCT, Grant No SFRH/BD/37730/2007).",

year = "2010",

month = jun,

doi = "10.1016/j.envpol.2010.03.005",

language = "English",

volume = "158",

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AU - Raimundo, Joana

AU - Vale, Carlos

AU - Canário, João

AU - Branco, Vasco

AU - Moura, Isabel

N1 - Funding Information: Joana Raimundo benefits from a PhD fellowship provided by the “Fundação para a Ciência e a Tecnologia” (FCT, Grant No SFRH/BD/37730/2007).

PY - 2010/6

Y1 - 2010/6

N2 - 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.

AB - 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.

KW - Cephalopods

KW - Mercury

KW - Methyl-mercury

KW - Portugal

KW - Selenium

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DO - 10.1016/j.envpol.2010.03.005

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SN - 0269-7491

VL - 158

SP - 2094

EP - 2100

JO - Environmental Pollution

JF - Environmental Pollution

IS - 6

ER -

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

Abstract

Keywords

UN SDGs

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