Bioaccumulation of organotin compounds in the marbled electric ray (Torpedo marmorata) in the northern Adriatic Sea.

Autor: Bajt O; National Institut of Biology, Marine biology station, Fornače 41, 6330 Piran, Slovenia. Electronic address: oliver.bajt@nib.si., Mavrič B; National Institut of Biology, Marine biology station, Fornače 41, 6330 Piran, Slovenia., Milačič R; Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia., Ščančar J; Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia., Zuliani T; Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia., Lipej L; National Institut of Biology, Marine biology station, Fornače 41, 6330 Piran, Slovenia.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2024 Jul; Vol. 204, pp. 116511. Date of Electronic Publication: 2024 May 30.
DOI: 10.1016/j.marpolbul.2024.116511
Abstrakt: Organotin compounds (OTC), tri-, di- and monobutyl tin, were determined in the tissues of marbled electric ray (Torpedo marmorata) in the Adriatic Sea. Marbled electric ray specimens were provided by local fishermen from three localities in the northern Adriatic: area close to the shipyard in Seča, the natural protected area Strunjan Nature Reserve and along the west Istrian coast. To assess the concentration of OTC in the environment, sediment samples were also analysed. After an adequate extraction of OTC from both matrices, their concentrations were determined by GC-ICP-MS. The results indicate that the accumulation of TBT (tributyltin) and DBT (dibutyltin) in the marbled electric ray is related to the possible pollution sources, since their total concentrations were significantly higher (p < 0.001) in the area close to the shipyard (up to 69 μg Sn kg -1 , w.w.) in comparison to the other two areas less affected by direct pollution (up to 7 μg Sn kg -1 , w.w.). TBT concentrations ranged from 2 to 42 μg Sn kg -1 , w.w., DBT concentrations were in the range from 2 to 22 μg Sn kg -1 , w.w., and MBT concentrations were mostly below the detection limit with the highest up to 4 μg Sn kg -1 , w.w. The proportion of the three determined congener concentrations in sediment samples indicate a temporally older pollution with these compounds, with prevailing DBT and MBT concentrations up to 30 μg Sn kg -1 , w.w., and much lower TBT concentrations up to 7 μg Sn kg -1 , w.w. According to our results, marbled electric ray could be considered as an ideal bioindicator of environmental pollution due to its ecological characteristics.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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