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Changes and variations of polycyclic aromatic hydrocarbon concentrations in fish, barnacles and crabs following an oil spill in a mangrove of Guanabara Bay, Southeast Brazil |
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| Authors: | Abílio Soares-Gomes Ricardo Aucélio Fábio B Pitombo Roberta L Ziolli |
| Institution: | a Laboratório de Ecologia de Sedimento, Departamento de Biologia Marinha, Universidade Federal Fluminense, Caixa Postal 100644, Niterói, RJ 24001-970, Brazil b Laboratório de Estudos Ambientais e Toxicologia (LEATox), Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rua Marquês de São Vicente, 225, Gávea, Rio de Janeiro, RJ 22453-900, Brazil c Vale Moçambique Ltda, Vila Carbomoc Casa 20, Moatize, Tete, Mozambique |
| Abstract: | On April 26th, 2005, an accident caused a leak of 60,000 L of Diesel Oil Type “B”, freighted by train wagons upstream on a mangrove area within Guanabara Bay, Southeast Brazil. After the accident, samples from animals with different biological requirements were collected in order to monitor polycyclic aromatic hydrocarbons concentrations for the following 12 months. Sessile, mobile, carnivorous, omnivorous, organic detritus feeders, planktivorous and suspension feeders were some of the attributes compared. Concentrations of PAHs did not vary in relation to different dietary habits and the best response was from the sessile suspensivorous barnacles. A background level of <50 μg kg−1 was suggested based on the reference site and on values observed in the following months after the accident. The highest values of PAH concentrations were observed in barnacles in the first month immediately after the spill, decreasing to background levels after few months. Barnacles are suggested as a sentinel species. |
| Keywords: | Polycyclic aromatic hydrocarbons Oil spill Crabs Barnacles Fish Sentinel Guanabara Bay |
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