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Bay Area Sport Fish Status 2006 Analysis

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25 diapositives · 363 Views · Oct 15, 2014

Explore data on Bay Area sport fish species' contaminant levels. Findings show elevated PCBs, mercury, dioxins, and pesticides, with many species exceeding established targets. Variations by species, location, and time.

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Bay Area Sport Fish Status 2006 Analysis
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  1. 2006 Sport FishStatus and Trends March 18, 2008 TRC Meeting Jennifer Hunt jennifer@sfei.org Draft Data - Do Not Cite, Quote, or Distribute

  2. 2006 Status & TrendsSport Fish • 3 Main Indicator Species • Organics – white croaker & shiner surfperch • PCBs – PBDEs – Dioxins – Legacy Pesticides • Mercury – striped bass • Analysis pending otolith results • Have white sturgeon mercury data Draft Data - Do Not Cite, Quote, or Distribute

  3. 2006 Additional Species • Look at additional sport fish species • Anchovy, barred surfperch, black surfperch, brown rockfish, Chinook salmon, rubberlip surfperch, walleye surfperch • Analyzed PCBs, Hg and PBDEs Draft Data - Do Not Cite, Quote, or Distribute

  4. Screening Values • PCBs – TMDL Tissue Target – 10 ppb ww • Dioxins – TMDL Tissue Target – 0.14 ppt ww • Mercury – TMDL Tissue Target 0.2 ppm ww • DDT, Chlordane, and Dieldrin – OEHHA values • PBDEs – No state screening value Draft Data - Do Not Cite, Quote, or Distribute

  5. Many Species Still Exceeding Targets Draft Data - Do Not Cite, Quote, or Distribute

  6. 97% reduction in average concentrations to reach target 100% Croaker Exceeding PCB TMDL Target Draft Data - Do Not Cite, Quote, or Distribute

  7. 100% Shiner Exceeding PCB TMDL Target 96% reduction in average concentrations to reach target Draft Data - Do Not Cite, Quote, or Distribute

  8. PCBs - Other Species 2003-2006 Draft Data - Do Not Cite, Quote, or Distribute

  9. Shiner Perch PCBs highest in Oakland (1997-2006) Draft Data - Do Not Cite, Quote, or Distribute

  10. 75% of Sturgeon Above Hg TMDL Target Draft Data - Do Not Cite, Quote, or Distribute

  11. Good News!Many Bay Species Below Hg TMDL Target Draft Data - Do Not Cite, Quote, or Distribute

  12. Sturgeon Mercury Higher in South Bay 57% of the variation in Hg accounted for by Site Draft Data - Do Not Cite, Quote, or Distribute

  13. Dioxins Not ChangingSum of Dioxin and Furan TEQs Draft Data - Do Not Cite, Quote, or Distribute

  14. Dioxins Varying by Site & TimeSum of Dioxin and Furan TEQs Draft Data - Do Not Cite, Quote, or Distribute

  15. Bay Wide DioxinsSum of Dioxin and Furan TEQs Draft Data - Do Not Cite, Quote, or Distribute

  16. Is Dioxin Equivalency Higher in 2006?Sum of Dioxin, Furan, and dioxin-like PCB TEQs Draft Data - Do Not Cite, Quote, or Distribute

  17. Dioxin Equivalent Toxicity higher in 2006?Sum of Dioxin, Furan, and dioxin-like PCB TEQsWhite Croaker PCB TEQ (ND=1/2 MDL) Draft Data - Do Not Cite, Quote, or Distribute

  18. Higher Dioxin Equivalent Toxicity due to higher Dioxin-Like PCBsSum of dioxin like PCB TEQs Draft Data - Do Not Cite, Quote, or Distribute

  19. 2006 PBDEs - All Species Draft Data - Do Not Cite, Quote, or Distribute

  20. PBDEs Varying Over Time Oakland Draft Data - Do Not Cite, Quote, or Distribute

  21. 2006 Dieldrin • White Croaker • South Bay had the highest concentrations – 3.3 ppb • 44% of Croaker Above SV (Oakland and South Bay) • Shiner Surfperch • South Bay had the highest concentrations – 2.5 ppb • 27% of Shiner Above SV (Oakland and South Bay) • White Sturgeon • 25% of Sturgeon Above SV (South Bay) Draft Data - Do Not Cite, Quote, or Distribute

  22. 2006 DDTs • White Croaker • South Bay had the highest concentrations – 110 ppb • 33% of Croaker Above SV (South Bay and SPB) • Shiner Surfperch • Oakland had the highest concentrations – 27 ppb • 0% of Shiner Above SV • White Sturgeon • South Bay had the highest concentrations – 42 ppb • 0% of Sturgeon Above SV Draft Data - Do Not Cite, Quote, or Distribute

  23. 2006 Chlordanes • White Croaker • South Bay had the highest concentrations – 24 ppb • 11% of Croaker Above SV • Shiner Surfperch • South Bay had the highest concentrations – 12 ppb • 0% of Shiner Above SV • White Sturgeon • South Bay had the highest concentrations – 13 ppb • 0% of Sturgeon Above SV Draft Data - Do Not Cite, Quote, or Distribute

  24. DDTs Varying Over Time Oakland Draft Data - Do Not Cite, Quote, or Distribute

  25. 2006 Summary • White croaker organic concentrations generally elevated over past years • Oakland generally higher than other sites for many contaminants • 100% white croaker, shiner perch, white sturgeon above PCB target • Interannual variation in PCBs but no time trends • Shiner PCBs statistically higher in Oakland • South Bay Hg statistically higher for shiner, jacksmelt, and white sturgeon • 100% white croaker above 0.14 dioxin target • No time trends in croaker dioxins • Croaker, shiner and sturgeon still exceeding dieldrin SV Draft Data - Do Not Cite, Quote, or Distribute