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Related Experiment Video

Updated: Sep 17, 2025

Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish
10:56

Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish

Published on: March 6, 2014

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Tracing PCB contamination in fish using shadow profiles and self-organizing maps.

Alexander Blume1, Thomas Gräff2, Andreas Höllrigl-Rosta2

  • 1Brandenburgische Technische Universität Cottbus-Senftenberg, Siemens-Halske-Ring 8, 03046 Cottbus, Germany.

Marine Pollution Bulletin
|July 3, 2025
PubMed
Summary

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Why BCF values from high test concentrations underestimate bioaccumulation - Reply to the comment by Ebert et al.

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Multiplexed biomarkers dynamically detect heterogeneous residual neuroblastoma cell clone activity in the bone marrow niche.

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PCB remobilisation from soils as contamination pathway for fish in the NE Atlantic and the Baltic Sea.

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Analysis and modelling of profiles to understand fractionation processes for contaminations with polychlorinated biphenyls observed in fish.

The Science of the total environment·2024

This study traced polychlorinated biphenyl (PCB) contamination in fish by mapping PCB profiles. Self-organizing maps identified PCB sources, revealing distinct contamination pathways for inland, Atlantic, and Baltic Sea fish.

Area of Science:

  • Environmental Chemistry
  • Ecotoxicology
  • Chemical Analysis

Background:

  • Polychlorinated biphenyls (PCBs) are persistent organic pollutants with significant environmental and health concerns.
  • Understanding the sources and transport pathways of PCB contamination in aquatic ecosystems is crucial for effective risk management.

Purpose of the Study:

  • To trace the origins of PCB contamination in fish by developing and applying a novel source-tracking methodology.
  • To differentiate between runoff-driven and atmospheric transport pathways contributing to fish contamination.

Main Methods:

  • Development of 'shadow profiles' representing potential PCB contamination sources and transport routes.
  • Utilizing self-organizing maps (SOM) to match fish PCB profiles to modelled shadow profiles.
Keywords:
Atmospheric transportContamination pathwaysPCBRunoff driven transportSOMSource allocation

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Related Experiment Videos

Last Updated: Sep 17, 2025

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Using an Automated 3D-tracking System to Record Individual and Shoals of Adult Zebrafish
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  • Analysis of international fish datasets from inland waters, the Northeast Atlantic, and the Baltic Sea.

    • Main Results:

    • Inland fish contamination primarily linked to runoff pathways, with atmospheric pathways also contributing.
    • Northeast Atlantic marine fish contamination predominantly attributed to atmospheric transport from European industrial nations.
    • Baltic Sea fish exhibited complex contamination histories involving both runoff and atmospheric pathways from surrounding regions.

    Conclusions:

    • The SOM technique effectively identified source-to-sink relationships for PCB contamination in fish.
    • Distinct contamination pathways were elucidated for different aquatic environments.
    • Refinements in shadow profile modeling are needed to address observed inconsistencies in source attribution.