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2003 Status & Trends Triennial Fish Monitoring

This report provides an update on the status and trends of fish populations in the San Francisco Bay. It includes analysis of contaminants such as PCBs, Hg, and PBDEs in various fish species. The report also examines long-term trends and highlights findings from a pilot study.

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2003 Status & Trends Triennial Fish Monitoring

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  1. 2003 Status & TrendsTriennial Fish Monitoring Update to RMP Technical Review CommitteeJennifer Hunt, Ben K. Greenfield, Jay A. DavisSFEIMarco Sigala, Cassandra Roberts, Rusty FaireyMoss Landing Marine LabsDave Crane, Kathleen Regalado, L.Nguyen, Gary IchikawaCDFG

  2. 2003 Status & TrendsTriennial Fish Monitoring • Status and Trends • 7 species • Added PBDE analysis for S&T species • Looked at As in 5 individual leopard sharks & 3 smoothound sharks • Looked at MeHg in 9 individual leopard sharks and 9 individual smoothound sharks • We now have a time series - data from 1994-2003

  3. Fish Tissue Analysis by Analyte

  4. 2003 Results - Status • All S&T fish below the SV (30 ng/g ww) for chlordanes • Dieldrin SV (2.0 ng/g ww) only exceeded for white croaker (45%) and white sturgeon (50%)

  5. Hg (ug/g ww) 2003SV=0.3 ug/g ww

  6. Aroclors (ng/g ww) 2003SV=20 ng/g ww ND=1 ND=6

  7. DDTs (ng/g ww) 2003SV=100 ng/g ww ND=2 ND=8

  8. PBDEs (ng/g ww) 2003 ND=1 ND=2 ND=7

  9. PBDEs • PBDE 47 was the dominant congener • PBDE 47>PBDE 100>PBDE 99>PBDE 153>PBDE 154 • BDE-47, BDE-99, and BDE-100 are the most bioaccumulative congeners from the commercial Penta-BDE mixture (Oros 2005) • Same order of magnitude found in RMP transplanted bivalves in 2003

  10. Pilot Study 2003 - Status • Brown smoothhound, Chinook Salmon, walleye surfperch, black surfperch, brown rockfish • Analyzed for PCBs and Hg • 3 bycatch species (anchovy, sardine and herring) analyzed for PCBs, PBDEs and Hg • Anchovy composite from South Bay had the 3rd highest PBDE (total) concentration of all fish measured (64.5 ng/g ww)

  11. Fish Tissue Analysis by Analyte

  12. Aroclors (ng/g ww) 2003SV=20 ng/g ww 9.36% lipid

  13. Hg (ug/g ww) 2003SV= 0.3 ug/g ww

  14. Trends • RMP/BPTCP 4 sampling periods • 1994, 1997, 2000, 2003 • White croaker, shiner surfperch, leopard shark, striped bass • RMP plus previous programs • Hg in striped bass: 1970-1972, 1994-2003 • Selenium in sturgeon: 1986-2003 • Organics in sturgeon: 1986-2003

  15. DDTs Wet Weight

  16. Chlordanes Wet Weight

  17. Lipid Content vs. Contaminants

  18. DDTs Lipid Weight

  19. Chlordanes Lipid Weight

  20. PCB Aroclors Lipid Wt.

  21. Hg in Striped Bass Data are standardized to a 55 cm fish

  22. Selenium in White Sturgeon

  23. Aroclors in Sturgeon

  24. DDTs in Sturgeon

  25. Chlordanes in Sturgeon

  26. 2003 Sturgeon Samples High in Lipid

  27. Trends Summary • Evidence of decline in lipid weight concentrations for DDTs and Chlordanes in most fish species • PCB decline since 1994? • White sturgeon organics - unusually elevated samples in 2003 • No long-term trend in striped bass Hg • No long-term trend in sturgeon Se

  28. Trends Summary * = Lipid wt. - = Negative trend

  29. Study Participants • Jen Hunt, Ben Greenfield, Jay Davis, SFEI • Rusty Fairey, Cassandra Roberts, Marco Sigala and crew, MLML • Dave Crane and crew, CDFG - MPSL • Gary Ichikawa and crew, CDFG • RMP Fish Work Group

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