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Flounder Histopathology and Chemistry

Flounder Histopathology and Chemistry. Michael Moore Woods Hole Oceanographic Institution Lisa Lefkovitz Battelle September 22, 1999. Flounder Objectives. To define health of winter flounder determine condition of liver chemical burdens liver histopathology

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Flounder Histopathology and Chemistry

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  1. Flounder Histopathology and Chemistry Michael Moore Woods Hole Oceanographic Institution Lisa Lefkovitz Battelle September 22, 1999

  2. Flounder Objectives • To define health of winter flounder • determine condition of liver • chemical burdens • liver histopathology • determine inorganic and organic contaminants in edible tissue • define baseline conditions • To determine response to effluent transfer

  3. Concerns Inflow Outflow Human Health Contaminants Bacteria Viruses Bioaccumulation Ecological Nutrients Contaminants Organic Material Food Chain Community Structure Living Resources ATMOSPHERE Light GasExchange WATER COLUMN N2, | O2, CO2 Mammals Planktivorous Fish Sources Rivers Boundary Nonpoint Effluents Piscivorous Fish Phytoplankton Dissolved Zooplankton Demersal Fish Flounder Microbes Particulate Detritus Regeneration Epibenthos Lobster Microbes N, P, Si, O2,,CO2 SEDIMENT Infauna

  4. Flounder Sampling Locations

  5. Flounder CHV vs time Centrotubular Hydropic Vacuolation (% prevelence) Year

  6. Flounder Tumors vs time Neoplasia (% prevalence) Year

  7. Flounder Fillet tPCB vs time Total PCB in Flounder Fillets 1992-1999 Year

  8. Flounder Liver tPCB vs time Year

  9. Flounder Fillet Hg vs time Year

  10. Flounder Liver Hg vs time Year

  11. Flounder Liver Ag vs time Year

  12. Flounder Liver Pb vs time Year

  13. Flounder Fillet Chlordane vs CHV Centrotubular HV (%)

  14. Flounder Liver Chlordane vs CHV Centrotubular HV (%)

  15. Flounder PCB Threshold Comparisons Annual Means ( ±95% CI) at Mass Bay Outfall

  16. Flounder DDT Threshold Comparisons Annual Means ( ±95% CI) at Mass Bay Outfall

  17. Flounder Chlordane Threshold Comparisons Annual Means ( ±95% CI) at Mass Bay Outfall

  18. Flounder Dieldrin Threshold Comparisons Annual Means ( ±95% CI) at Mass Bay Outfall

  19. Flounder Hg Threshold Comparisons Annual Means ( ±95% CI) at Mass Bay Outfall

  20. Flounder Summary • Steady level of organic contaminant burdens and histopathological effects since 1991 - lowest in Eastern Cape Cod Bay, moderate at Future Outfall Site,and highest at Deer Island Flats. • Significant reduction in tumor prevalence at Deer Island in ‘90’s compared to ‘80’s. • Inorganic contaminant burdens do not show the same regiospecificity.

  21. FlounderExpected Response • Expected response once system outfall complete: • Little change, given the projected low level contaminant burdens in the secondarily treated effluent. • The major challenge in terms of toxics and their effects: • Has been and is still to promote source reduction • Ongoing effort should see a gradual reduction in the chemical burden and resultant effects to the extent that the MWRA effluent is responsible for the current observed effects.

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