2006 Sport Fish Status and Trends

1
2006 Sport FishStatus and Trends

• March 18, 2008
• TRC Meeting
• Jennifer Hunt
• jennifer_at_sfei.org

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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

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

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

5
Many Species Still Exceeding Targets
6
100 Croaker Exceeding PCB TMDL Target
97 reduction in average concentrations to reach
target
7
100 Shiner Exceeding PCB TMDL Target
96 reduction in average concentrations to reach
target
8
PCBs - Other Species 2003-2006
9
Shiner Perch PCBs highest in Oakland (1997-2006)
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75 of Sturgeon Above Hg TMDL Target
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Good News!Many Bay Species Below Hg TMDL Target
12
Sturgeon Mercury Higher in South Bay
57 of the variation in Hg accounted for by Site
13
Dioxins Not ChangingSum of Dioxin and Furan TEQs
14
Dioxins Varying by Site Time Sum of Dioxin and
Furan TEQs
15
Bay Wide DioxinsSum of Dioxin and Furan TEQs
16
Is Dioxin Equivalency Higher in 2006? Sum of
Dioxin, Furan, and dioxin-like PCB TEQs
17
Dioxin Equivalent Toxicity higher in 2006? Sum
of Dioxin, Furan, and dioxin-like PCB TEQsWhite
Croaker PCB TEQ (ND1/2 MDL)
18
Higher Dioxin Equivalent Toxicity due to higher
Dioxin-Like PCBsSum of dioxin like PCB TEQs
19
2006 PBDEs - All Species
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PBDEs Varying Over Time
Oakland
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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)

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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

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

24
DDTs Varying Over Time
Oakland
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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