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Table 6 Examples of fish with lower levels of mercury [34]. ND = Mercury concentration below detection level (Level of Detection = 10 ppb)

From: Prenatal mercury exposure, autism, and developmental delay, using pharmacokinetic combination of newborn blood concentrations and questionnaire data: a case control study

Species Mercury concentration (ppb)
Mean Median Std. Dev.
Anchovies 17 14 15
Catfish 25 5 57
Pollock 31 3 89
Salmon (canned) 8 ND 17
Salmon (Fresh/Frozen) 22 15 34
Sardine 13 10 15
Tilapia 13 4 23
Trout (freshwater) 71 25 141
Tuna (canned light) 128 78 135