| PoIycyclic aromatic hydrocarbons (PAH) are priority trace organic pollutants in the CLRTAP(Convention on Long-Range Transboundary Air PolIution) POPs (persistent organic poIlutants)protocol. Both laboratory experiments and fie1d surveys unequivocally demonstrated that PAHadversely affect estuarine and marine organisms. PAH are implicated in the development ofIesions and tumors in fish, they produce biochemical disruptions and cell damage that Iead tomutations, developmental malformations and canceL Although many marine organisms do noteXhibit acute responses to PAH' exposure, but suffer sublethal effects. lmpacts on popu1ation andcommunity may not be detected until years after initial PAH' exposure. Therefore, it is importantto develop criteria to indicate PAH' poIlution status in the marine environments. Biomarkers arepromising tools fOr assessing the exposure to toxicants, and predicting the likely response. Sincethe complexity of the marine environments, the toxic effects to biota are very complicated,therefore, the use of biomarkers for assessing marine environments is still rather ambitious.The aim of this study is to examine PAH' distribution in tt'ater and sediment. anaI}'ze theirsources, and try to develop a set of biomarkers to indicate PAH' pollution level in the fOllox"ingstudv areas.The Meizhou Ba}\ located in the mid-east coast of Fujian, China, is a semi-encIosed narrot" ba}'stretching deep into the inland t',ith favorable hydrologicaI circulation conditions and designed asone of the four key deepx"ater transshipment ports in China. With the construction of ports.oil-refinery works and power industry in the coastal area; PAH' pollution is an potentialenvironmental risk factor in this marine environment, but no data of PAH IeveI in this marine.'environment were examined before. Western Xiamen Harbor, located in Xiamen. China t"ithharbor rapidly development; PAH' levels in water, suspended particulate mattef, pore t"ater andsediment samples t'ere studied before, but no data on the maricultura1 sites in this area t'+ereexamined yet.The field surveys and lab experiments tvere designed to study the distribution and source ofPAH' polIution in x"ater, sediment; the PAH' concentration and distribution in marine fish organ(of the fish LateolabImjaPo)1iclls and PagivsOnIlls Inajor); the PAH' BCF factors of liver and bilein marine fish (Laleolabral jtwo)1ItIts and Pag7vso))Ills ))1ajbr); the reIationship between PAH'exposure and biochemicaI response (CAT SOD, LPO) and the metabolic rate of naphthalene andpyrene in fish bile. The foIIo\ving results \"ere obtained fl In Meizhou Ba',t(l) The source of PAH in surface seawater was mainly from crude oil (petrogeniccontamination ) and the source of PAH in sediments xvas mainlv from fuel-combustion(pyrogentic).(2) Refer to the extrapolated safe levels developed by various countries and internationalorganizations for aquatic organisms exposed to PAH in x"ater to assess aquatic quality formaricultural purpose, and the results sho''?ed lhat PAH' pollution in seat'rater was alread}' a threatfor its maricultural use.(3) PAH' levels in maricultural site tvere much higher than that in the adjacent non-mariculturalsite, and it showed that mariculture was one of the contributors of marine PAH' pollution inseaL\ateF.2 Western Xiamen Harbort(1 ) PAH' levels in surface seat"ater and sediment of the survey site \"ere quite severe. Z PAH(for l6 EPA priority PAH) concentration in surface sea''ater t'as 4.55 llg/L, and 2.86 Ped insurface sediment.(2) The survey maricultural site was quite polluted, and it t'as not suitable for maricuIturalpurPose.3 The resu1ts shot',ed that fish biIe could concentra1e parent PAH, and the PAH' concentrationcorrela1ed to the PAH' pollution levels in seawatef, thus, it could be used as a biomarker toindicate PAH' pol1ution leve1s in seawater. The metabolism of naphthalene and pyrene ''-as alsoIVs...
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