Antarctic octopod beaks as proxy for mercury concentrations in soft tissues
International audience 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 ar...
Published in: | Marine Pollution Bulletin |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-02904180 https://hal.archives-ouvertes.fr/hal-02904180/document https://hal.archives-ouvertes.fr/hal-02904180/file/Matias%20et%20al%202020%20MPB.pdf https://doi.org/10.1016/j.marpolbul.2020.111447 |
Summary: | International audience 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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