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Fig. 1 | Environmental Sciences Europe

Fig. 1

From: Selection and application of trophic magnification factors for priority substances to normalize freshwater fish monitoring data under the European Water Framework Directive: a case study

Fig. 1

Comparison of TL 4-normalization approaches using ∑6 PBDE concentrations in composite samples of fillet (F) of fish from the rivers Moselle (M) and Havel (H). Samples in Moselle and Havel are arranged according to increasing TL. Approach (1): sum of TL 4-normalized PBDE congener concentrations; congener-specific TMFs (Additional file 1: Table S3) were used for normalizing single congener concentration, which were then summed up. Approach (2): sum of congener concentrations normalized to TL 4 by applying the arithmetic mean TMF of the individual congener TMFs (= 1.73) used in approach (1). Approach (3): sum of PBDE concentrations normalized to TL 4 using the geometric mean TMF for BDE 47 (= 2.25)

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