Abstract
In this study, three stations of the north Persian Gulf were analyzed in order to determinethe effect of trophic levels on the concentration of harmful PAHs in fish and sediment. In all cases,similar distributions were observed in which benzo(a)pyrene largely predominated andbenzo(b)fluoranthene and pyrene were the second major compounds in fish tissues. The predominantcomponents of PAHs in sediment were acenaphthene, pyrene and benzo(ghi)perylene. Based on themolecular weight of PAHs, the concentrations of the compounds vary among species. Netumabilineata, which is carnivorous, classified at a 0.49 to 3.8 trophic level and lives in association withsediment, accumulated the highest concentrations of high molecular weight PAHs, whereas L. abu,which is herbivorous and classified at a 0.2 to 2.6 trophic level, tended to accumulate low molecularweight PAHs. Comparison among the stations indicated that the fish and sediment from Tangestanestuary accumulated the highest levels of the compounds.
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