Spatial Variation in Hepatic Levels and Patterns of PCBs and PCDD/Fs among Young-of-the-Year and Adult Atlantic Tomcod (Microgadus tomcod) in the Hudson River Estuary

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• 作者：Marc P. Fernandez ; Michael G. Ikonomou ; Simon C. Courtenay ; and Isaac I. Wirgin
• 刊名：Environmental Science & Technology
• 出版年：2004
• 出版时间：February 15, 2004
• 年：2004
• 卷：38
• 期：4
• 页码：976 - 983
• 全文大小：131K
• 年卷期：v.38,no.4(February 15, 2004)
• ISSN：1520-5851

文摘

Full congener-specific polychorinated biphenyl (PCB) andpartial-congener-specific polychorinated dibenzo-p-dioxin/furan (PCDD/F) analyses were performed on livers fromyoung-of-the-year (YOY) and adult Atlantic tomcod from theHudson River estuary including multiple sites along the main-stem Hudson River and Newark Bay/Hackensack River,NJ, and from a reference river, the Miramichi River, NB.Highest hepatic burdens of PCBs were found in fish collectedin the main-stem Hudson River between river miles (RM)37 and 50 and in Newark Bay/Hackensack River. By far, thehighest concentrations of PCDD/Fs were seen in fishfrom Newark Bay/Hackensack River. The di- to tetrachlorinated biphenyls dominated the PCB composition in YOYtomcod, whereas the penta- to nonachlorinated biphenylspredominated in adults with particular prevalence of the2,4,5-substituted diortho congeners. Overall, using a directmixing model an aroclor composition of approximate 1:1:1, A1242:A1254:A1260, was calculated from the hepatic PCBprofiles in YOY tomcod. A linear increase in A1242characteristics with river mile was seen in YOY collectedbetween RM 0 and RM 80, which was likely due to the well-characterized A1242 source from the former capacitormanufacturing plants located upriver. However, tomcodcaught upstream of RM 80 exhibited a PCB pattern withdecreasing A1242 characteristics, and it was hypothesizedthat this was due to the increased depuration or decreaseduptake of low chlorinated (log K_OW < 6) congenersupon entry of the fish into freshwater from brackish water.The most abundant tetra-octa PCDD/F chlorohomologuein tomcod collected from the main stem of the Hudson Riverwas TCDF, whereas 2,3,7,8-TCDD was the major congenerdetected in tomcod from Newark Bay/HackensackRiver, which showed elevated total PCDD/F levels comparedto tomcod from the main-stem Hudson River.