1. A First Comprehensive Baseline of Hydrocarbon Pollution in Gulf of Mexico Fishes.
- Author
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Pulster EL, Gracia A, Armenteros M, Toro-Farmer G, Snyder SM, Carr BE, Schwaab MR, Nicholson TJ, Mrowicki J, and Murawski SA
- Subjects
- Animals, Biliary Tract metabolism, Cuba, Environmental Monitoring statistics & numerical data, Female, Florida, Geologic Sediments chemistry, Gulf of Mexico, Male, Mexico, Petroleum Pollution adverse effects, Polycyclic Aromatic Hydrocarbons metabolism, Seawater chemistry, Biliary Tract chemistry, Fishes metabolism, Polycyclic Aromatic Hydrocarbons analysis, Water Pollutants, Chemical analysis, Water Pollution, Chemical statistics & numerical data
- Abstract
Despite over seven decades of production and hundreds of oil spills per year, there were no comprehensive baselines for petroleum contamination in the Gulf of Mexico (GoM) prior to this study. Subsequent to the 2010 Deepwater Horizon (DWH) spill, we implemented Gulf-wide fish surveys extending over seven years (2011-2018). A total of 2,503 fishes, comprised of 91 species, were sampled from 359 locations and evaluated for biliary polycyclic aromatic hydrocarbon (PAH) concentrations. The northern GoM had significantly higher total biliary PAH concentrations than the West Florida Shelf, and coastal regions off Mexico and Cuba. The highest concentrations of biliary PAH metabolites occurred in Yellowfin Tuna (Thunnus albacares), Golden Tilefish (Lopholatilus chamaeleonticeps), and Red Drum (Sciaenops ocellatus). Conversely, biliary PAH concentrations were relatively low for most other species including economically important snappers and groupers. While oil contamination in most demersal species in the north central GoM declined in the first few years following DWH, more recent increases in exposure to PAHs in some species suggest a complex interaction between multiple input sources and possible re-suspension or bioturbation of oil-contaminated sediments. This study provides the most comprehensive baselines of PAH exposure in fishes ever conducted for a large marine ecosystem.
- Published
- 2020
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