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L. VIÑAS, M.A. FRANCO, J.A. SORIANO and J.J. GONZÁLEZ

Spatial and temporal distribution of petroleum hydrocarbons in wild mussels in Galicia after the Prestige oil spill. L. VIÑAS, M.A. FRANCO, J.A. SORIANO and J.J. GONZÁLEZ Instituto Español de Oceanografía, Centro Oceanográfico de Vigo, Cabo Estai-Canido. 36200 Vigo, Spain

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L. VIÑAS, M.A. FRANCO, J.A. SORIANO and J.J. GONZÁLEZ

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  1. Spatial and temporal distribution of petroleum hydrocarbons in wild mussels in Galicia after the Prestige oil spill L. VIÑAS, M.A. FRANCO, J.A. SORIANO and J.J. GONZÁLEZ Instituto Español de Oceanografía, Centro Oceanográfico de Vigo, Cabo Estai-Canido. 36200 Vigo, Spain L. ORTIZ, J.M. BAYONAand J. ALBAIGÉS Department of Environmental Chemistry, CID-CSIC, Jordi Girona, 18-26, 08034-Barcelona, Spain.

  2. Mussel as a sentinel organism: • Concentrate substances over their levels in the environment. • The tissue reflects environmental changes. • Stay in a single location: Sessile. • Fairly resistant to chemical contamination. • Abundant along the studied area.

  3. Sampling • 24 stations • October 2000 pre-spill • February 2003 3 months after spill • June 2003 7 months after spill

  4. Analytes determined • Aliphatic hydrocarbons, with special emphasis on the profiles of fossil markers, such as triterpanes and steranes. • Analysed by GC-MS

  5. Analytes determined • Aromatic hydrocarbons, 13 parent PAHs. • Analysed by HPLC-FLD

  6. General distribution of PAHs

  7. October 2000-February 2003

  8. October 2000-February 2003-June 2003

  9. MUXÍA Phe Phe Phe Phe 40 40 40 40 In123cdP In123cdP Ant Ant In123cdP In123cdP Ant Ant 30 30 30 30 dBahA dBahA Fluo Fluo dBahA dBahA Fluo Fluo 20 20 20 20 10 10 10 10 BghiP BghiP Pyr Pyr BghiP Pyr Pyr BghiP 0 0 0 0 Phe 30 In123cdP Ant BaP BaP BaA BaA BaP BaA BaA BaP 20 dBahA Fluo BkF BkF Chry Chry BkF BkF Chry Chry 10 PUNTA INSUA BbF BbF BeP BeP BbF BbF BeP BeP BghiP Pyr Phe Phe Phe 0 30 40 40 In123cdP Ant In123cdP Ant In123cdP Ant BaA BaP 30 30 20 dBahA dBahA Fluo dBahA Fluo Fluo 20 20 BghiP BkF Chry 10 10 10 Pyr BghiP Pyr BghiP Pyr BbF BeP 0 0 0 BaP BaA BaP BaA BaP BaA BkF Chry BkF Chry BkF Chry BbF BeP BbF BeP BbF BeP PAH profile

  10. CABO HOME Phe Phe Phe Phe 40 40 40 40 In123cdP In123cdP Ant Ant In123cdP In123cdP Ant Ant 30 30 30 30 dBahA Fluo Fluo dBahA dBahA dBahA Fluo Fluo 20 20 20 20 Phe 30 10 10 In123cdP Ant 10 10 BghiP BghiP Pyr Pyr BghiP BghiP Pyr Pyr 20 dBahA Fluo 0 0 0 0 10 BghiP Pyr 0 BaP BaP BaA BaA BaP BaA BaA BaP BaP BaA BkF Chry BeP BbF BkF BkF Chry Chry BkF BkF Chry Chry BbF BbF BeP BeP BbF BeP BeP BbF FERROL-PÍAS Phe Phe 30 In123cdP Ant 30 In123cdP Ant 20 dBahA Fluo 20 dBahA Fluo 10 10 BghiP Pyr BghiP Pyr 0 0 BaP BaA BaP BaA BkF Chry BkF Chry BbF BeP BbF BeP Phe 30 In123cdP Ant 20 dBahA Fluo 10 BghiP Pyr 0 BaP BaA BkF Chry BbF BeP PAH profile

  11. Isomeric ratios 27Ts: 18a(H)-22,29,30-trisnorneohopane/17a(H)-22,29,30-trisnorhopane %29ab: 17a(H),21b(H)-30-norhopane/17a(H),21b(H)-hopane %29aaS: 24-ethyl-14a(H),17a(H)cholestane (20S/20R) %29bb: 24-ethyl-14b(H),17b(H)cholestane (R+S)/24-ethyl-14a(H),17a(H)cholestane(R+S)

  12. Conclusions • Two main groups of mussels: affected and not affected by the spill • Increase of hydrocarbons in February and subsequent decrease in June.

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