“…Recent studies indicated that several freshwater fishes cultivated 127 in fish ponds around the PRD and purchased from local markets all contained DDTs 128 (Cheung et al, 2006), and in particular the Mandarin fish (Siniperca kneri) are of actual 129 concern, which could contain DDTs up to 4.3 times higher (62 µg kg-1 wet wt.) than 130 128, 134, 136, 138, 144, 146, 147, 151, 153, 157, 158 165 (total hexa-PCBs), 173,174,177,179,180,187,190,191 (total hepta-PCBs), 194, 195, 166 199, 203…”