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Analysis of essential and non-essential trace elements in the organs of a mother–fetus pair of spotted seals (Phoca largha) from the Sea of Japan

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Abstract

Concentrations of 22 essential and non-essential trace elements (Be, Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd, Sb, Ba, Tl, Pb, Th, U, and Hg) were measured in the organs of a mother–fetus pair (at the last trimester of pregnancy) of spotted seals from the Sea of ​Japan. The concentrations of eleven elements are reported for the first time. Eight organs of the pair were examined: lungs, heart, liver, kidneys, intestines, spleen, muscles, and bones. All trace elements detected in the organs of the mother were found also in the organs of the fetus at various concentrations. Placenta is not an effective barrier to prevent non-essential elements from getting into the fetus, but can control entry of some of them, e.g., aluminum, cadmium, and mercury. In most organs of the fetus, the concentrations of toxic trace elements (beryllium, antimony, thorium, and uranium) were noticeably higher than in the same organs of the mother, which indicates that during pregnancy female removes excess of non-essential trace elements by transferring them to the fetal body through the placental barrier.

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Acknowledgements

The authors are grateful to Leonid Pavin who informed us about the spotted seal carcass found on Russky Island that we used in the study. Many thanks are due to Evgeny Shvetsov for translating the manuscript into English. The map was composed in QGIS 2.4.0 using GADM maps and data (https://gadm.org/data.html).

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All data generated or analyzed during this study are included in this published article.

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Conceptualization: MVS AMT

Investigation: MVS AMT

Collection the biological material: AMT

Analysis of samples: MVS

Data interpreted: MVS AMT

Writing—original draft: MVS AMT

Editing after reviewing: MVS AMT

Both authors read and approved the final manuscript.

Corresponding author

Correspondence to Alexey M. Trukhin.

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The authors declare no competing interests.

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Responsible Editor: Philippe Garrigues

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Simokon, M.V., Trukhin, A.M. Analysis of essential and non-essential trace elements in the organs of a mother–fetus pair of spotted seals (Phoca largha) from the Sea of Japan. Environ Sci Pollut Res 28, 60622–60634 (2021). https://doi.org/10.1007/s11356-021-14971-7

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  • DOI: https://doi.org/10.1007/s11356-021-14971-7

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