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Table 4 Results obtained in scenario #2 according to Eq. 5 parameter variants. Cgam is the concentration measured in caged gammarids, slope is the slope of the regression between fish fillet and whole-body concentrations, and TLgam is the trophic level assigned to caged gammarids

From: Monitoring priority substances in biota under the Water Framework Directive: how effective is a tiered approach based on caged invertebrates? A proof-of-concept study targeting PFOS in French rivers

TMF Cgam Slope TLgam N Type I N Type II Correct
TMF50 1 campaign (Sep) Lower bound 75th percentile 1 4 10
TMF50 1 campaign (Sep) Median 75th percentile 0 5 10
TMF50 1 campaign (Sep) Upper bound 75th percentile 0 6 9
TMF50 2 campaigns (June–Sep) Lower bound 75th percentile 1 4 10
TMF50 2 campaigns (June–Sep) Median 75th percentile 0 5 10
TMF50 2 campaigns (June–Sep) Upper bound 75th percentile 0 5 10
TMF50 3 campaigns Lower bound 75th percentile 0 4 11
TMF50 3 campaigns Median 75th percentile 0 5 10
TMF50 3 campaigns Upper bound 75th percentile 0 5 10
TMF75 1 campaign (Sep) Lower bound 75th percentile 1 4 10
TMF75 1 campaign (Sep) Median 75th percentile 1 4 10
TMF75 1 campaign (Sep) Upper bound 75th percentile 0 4 11
TMF75 2 campaigns (June–Sep) Lower bound 75th percentile 1 1 13
TMF75 2 campaigns (June–Sep) Lower bound Median 2 0 13
TMF75 2 campaigns (June–Sep) Median 75th percentile 1 3 11
TMF75 2 campaigns (June–Sep) Upper bound 75th percentile 0 5 10
TMF75 3 campaigns Lower bound 75th percentile 1 1 13
TMF75 3 campaigns Lower bound Median 2 0 13
TMF75 3 campaigns Median 75th percentile 0 3 12
TMF75 3 campaigns Upper bound 75th percentile 0 5 10