葡萄牙沿海地区普通章鱼组织中汞、甲基汞和硒的关系。
Relations between mercury, methyl-mercury and selenium in tissues of Octopus vulgaris from the Portuguese coast.
机构信息
IPIMAR-National Institute of Biological Resources, Av. Brasília, 1449-006 Lisbon, Portugal.
出版信息
Environ Pollut. 2010 Jun;158(6):2094-100. doi: 10.1016/j.envpol.2010.03.005. Epub 2010 Apr 2.
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 microg 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.
在葡萄牙三个地区的普通章鱼的消化腺和套膜中测定了汞、甲基汞（MeHg）和硒。据我们所知，这是头足类动物中首次出现的关于 MeHg 的数据。在消化腺中发现的浓度高于套膜中，且甲基汞在套膜中的百分比更高。在奥良（Olhão）的样本中，消化腺中 Hg 和 MeHg 的含量更高（分别为 3.1-7.4 和 2.0-5.0 μg g(-1)）。地区之间的差异可能部分与 Hg 的可用性有关。套膜和消化腺中浓度之间的关系表明，来自马托西纽什（Matosinhos）和卡斯凯什（Cascais）的样本中 Hg 和 MeHg 在组织中的比例增加，但来自奥良（Olhão）的个体套膜中的值相对稳定（污染较高）。来自马托西纽什（Matosinhos）和卡斯凯什（Cascais）的章鱼的消化腺中的 Se:Hg 摩尔比分别为 32 和 30，而来自奥良（Olhão）的则为 5.4。接近这个比例表明，在消化腺中 MeHg 水平升高时，发生了脱甲基化反应。
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