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Oil hydrocarbon fingerprints of the different marine organisms in some Egyptian Gulf of Suez waters

Abstract Oil hydrocarbon fingerprints derived from polycyclic aromatic and aliphatic hydrocarbon were analyzed in marine organisms of various aquatic species muscles collected from 10 different sites along Suez Gulf, Egypt. All samples were analyzed for n-alkanes (C15–C37) and polycyclic aromatic hydrocarbons (EPA list of PAHs). n-Alkanes in ten aquatic species were found to be in the range of 11.391–96.747 ng/g wet weight with a mean value of 60.755 ng/g wet weights. Different indices were calculated for the n-alkanes to assess their sources as carbon preference index (CPI), average chain length (ACL), terrigenous/aquatic ratio (TAR), natural n-alkane ratio (NAR) and proxy ratio (Paq). Most of the various species of n-alkanes were discovered to be from natural sources. Polycyclic aromatic hydrocarbons (PAHs) varied between 81.499 and 5895.608 ng/g wet weight with an average of 2521.126 ng/g wet weight. The contents of ƩPAHs were the highest in the tissues. The carcinogenic risks for humans from residual ƩPAHs in the various fish tissues higher than10−5.