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Article Dans Une Revue Marine Pollution Bulletin Année : 2020

Antarctic octopod beaks as proxy for mercury concentrations in soft tissues

Résumé

As the role of mercury is poorly known in Southern Ocean biota, the total mercury (T-Hg) concentrations were evaluated in upper/lower beaks, digestive gland, gills and mantle muscle of Adelieledone polymorpha and Pareledone turqueti, two of the most abundant octopod species around South Georgia. Beaks had the lowest T-Hg concentrations (A. polymorpha: [T-Hg]Upper= 27.2±12.9 ng•g-1 and [T-Hg]Lower= 27.5±20.0 ng•g-1 ; P. turqueti: [T-Hg]Upper= 34.6±13.9 ng•g-1 and [T-Hg]Lower= 56.8±42.0 ng•g-1), followed by gills and muscle. The highest values were recorded in the digestive glands (A. polymorpha: 251.6±69.7 ng•g-1 ; P. turqueti: 347.0±177.0 ng•g-1). Significant relationships were found between the concentrations of T-Hg in the beaks and muscle of A. polymorpha (T-Hg in muscle is 10 times higher than in beaks). This study shows that beaks can be used as proxy for T-Hg in muscle for some octopod species, and a helpful tool for estimating total Hg body burden from beaks.
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Dates et versions

hal-02904180 , version 1 (21-07-2020)

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Ricardo S Matias, José Seco, Susan Gregory, Mark Belchier, Maria E Pereira, et al.. Antarctic octopod beaks as proxy for mercury concentrations in soft tissues. Marine Pollution Bulletin, 2020, 158, pp.111447. ⟨10.1016/j.marpolbul.2020.111447⟩. ⟨hal-02904180⟩

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