title: Polycyclic aromatic hydrocarbon in inter-tidal mussel Perna perna: space-time observations, source investigation and genotoxicity.
abstract: The investigation aimed primarily at understanding the PAH record in inter-tidal mussel tissues and evaluating the bivalve performance as a bioindicator for oil contamination. The species Perna perna was used as test organism since it is abundantly distributed in coastal areas of the Americas, Africa and elsewhere. The study was carried out in Guanabara Bay and comprised two observation phases: phase one included seasonal sampling in 8 sites, whereas in phase two 4 sites were examined over 4 years. Among the 35 determined PAH (60-90 microg kg(-1) up to 4000-6000 microg kg(-1)) alkylated homologues predominated by more than 80%. The PAH profile in inter-tidal mussels is largely petrogenic with high contribution of dibenzothiophenes (DBT) and phenanthrenes (Ph). The prevailing petrogenic fingerprint, confirmed by diagnostic ratios, is linked to the properties of the inter-tidal habitat, which favors exposure to oil films. C2DBT/C2Ph and C3DBT/C3Ph ratios, however, show a wide range of values uncorrelated to specific oils. Micronucleus frequencies are significantly related to PAH concentrations, especially to those of alkylated homologues. Genotoxic expression appears at concentrations as low as 300 microg kg(-1) summation operator 35 PAH.
authors.affiliation: Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro, R. Marques de S. Vicente 225, 22453-900 Rio de Janeiro, Brazil.
authors.forename: E
authors.initials: E
authors.lastname: Francioni
authors.forename: A de L R
authors.initials: Ade L
authors.lastname: Wagener
authors.forename: A de L
authors.initials: Ade L
authors.lastname: Scofield
authors.forename: M H
authors.initials: MH
authors.lastname: Depledge
authors.forename: B
authors.initials: B
authors.lastname: Cavalier
authors.forename: C B
authors.initials: CB
authors.lastname: Sette
authors.forename: L
authors.initials: L
authors.lastname: Carvalhosa
authors.forename: C
authors.initials: C
authors.lastname: Lozinsky
authors.forename: R
authors.initials: R
authors.lastname: Mariath
mesh_terms: D000818:Animals; D001938:Brazil; D004784:Environmental Monitoring / Q000379:methods*; D005163:Factor Analysis, Statistical; D015162:Micronucleus Tests; D009152:Mutagenicity Tests; D049883:Perna / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000633:toxicity; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical