吳先琪2006-07-262018-06-282006-07-262018-06-282004-07-31http://ntur.lib.ntu.edu.tw//handle/246246/22132本研究藉由分析安平港航道，二仁溪口及分布其間之漁塭中的前鱗鯔體內以及二仁 溪口底泥中多氯聯苯之分布，以探討昔日重金屬回收行為所釋出之多氯聯苯在生物體內 之累積影響及其暴露途徑。研究結果顯示生長於較高污染潛勢棲地之魚體內累積有較高 之多氯聯苯，其污染程度依序為二仁溪河口，安平港航道及魚塭。而魚體內多氯聯苯同 源物之形態分析則透露出暴露途徑之差異。生長於污染潛勢較高之棲地的魚類樣本，由 於其主要暴露途徑為昔日底泥中殘存之多氯聯苯，所以其體內低氯數物種之比例愈低; 反之漁塭的魚體內則具有較高之低氯數物種比例，所以推斷其暴露途徑較可能是來自於 大氣與水相之傳輸作用。針對母代與子代間多氯聯苯之傳遞效應的初步研究結果顯示， 較高氯數之同源物因為較不易為生物所代謝及轉換，所以較高氯數之同源物便有較高之 傳遞比例。特定同源物之傳遞效率對logKow 之線性關係的相關係數為0.77，表示傳遞效 率和多氯聯苯之物化特性相關。This study investigated the Polychlorinated biphenyls (PCBs) contamination level of mullet fish (Liza affinis) resided in the Er-Jen estuary, the Ann-Ping Harbour and nestled costal fish farms, and that of surface sediments in this estuary were also examined to verify the seasonal fluctuation on the dietary source of PCBs in the estuarine mullet fish. The PCB body burdens of collected fish samples are proportional to the contamination level of their habitats and rank in sequence from the Er-Jen estuary, the Ann-Ping harbour to the fish farms. PCB content of the estuarine mullet has been approximately depleted to one half of that of 1990’s peak value. Although the farmed fish inhabiting near the two hot spots and whose PCB burden is higher than that of the average of local fish markets, no particularly high contamination level was observed in their bodies. Applying light PCB fraction ((triCB + tetraCB) / total PCBs) as the indicator of the origins of PCB, mullet fish near the former contamination hot spot performed higher body burden with lower light PCB fraction, while the farmed fish exhibited the PCB pattern more likely that originated from air-water exchange. Preliminary study on the transformation of PCB burden from mother mullet to their next generation through reproduction indicated that congener-specific characteristics dominate this transformation. Higher fraction of heavy-chlorinated PCBs, rather than light-chlorinated congeners, observed in the eggs indicated that resistance to PCB biotransformation of heavy congeners led to this result. Although the PCB contamination has been stopped for a decade, the residual contaminants, supposedly existing in soil and sediments, still contributes to the body burden of fish resided in the estuary and the harbour.application/pdf266035 bytesapplication/pdfzh-TW國立臺灣大學環境工程學研究所多氯聯苯河口港口漁塭魚卵前鱗鯔PCBsestuaryharbourfish farmeggsmulletreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/22132/1/922211E002027.pdf