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Contaminant Concentrations in Fish: 2000 Ben Greenfield and Jay Davis SFEI
Contaminant Concentrations in Fish:
2000
Ben Greenfield and Jay Davis SFEI
This talk includes the work of:
Marco Sigala, Cassandra Roberts, and Rusty FaireyMoss Landing Marine Labs
David Crane, Kathleen RegaladoCDFG Water Pollution Control Lab
John WilcocksonEVS Environment Consultants
Fred HetzelSFB Regional Water Quality Control Board
Patricia Chambers, Jay Davis, Ben Greenfield,Cristina Grosso, Jon Leatherbarrow, John Ross,and Eric WittnerSan Francisco Estuary Institute
Fish Monitoring Goals
• Status– Human health advisories
• Trends• Spatial Patterns
Special Study Goals
• Mechanisms
Contaminant Concentrations in Fish: 2000
Chemical SamplingSpecial Studies
•Organochlorines •Seasonal Croaker Chemistry
–PCBs
–DDTs •Food Web Study
–Chlordanes –Gut Contents
–Dieldrin –PCB Food Web Model
–Dioxins
–PBDEs •Stable Isotopes
•Trace Metals •Biomarkers
–Mercury
–Selenium •Crabs and Clams
Focus on Species Consumed by Humans or Useful Spatial Indicator
Species
(All photos courtesy of Cassandra Roberts and Marco Sigala, MLML)
Fish Monitoring Goals
• Status– Human health advisories
• Trends• Spatial Patterns
Special Study Goals
• Mechanisms
PCB Concentrations in San Francisco Bay Fish2000
Mercury Concentrations in San Francisco Bay Fish2000
Contaminant
N Percent Above
PCBs 80 90%
Mercury 134 38%
Dieldrin 80 19%
Selenium 12 17%
DDTs 80 4%
Chlordanes 80 0%
Percent of Fish Samples That Are AboveScreening Values
(Screening values from Brodberg and Pollock 1999)
Fish Monitoring Goals
• Status– Human health advisories
• Trends• Spatial Patterns
Special Study Goals
• Mechanisms
Seasonal Variation In White Croaker PCBs2000
Fish Monitoring Goals
• Status– Human health advisories
• Trends• Spatial Patterns
Special Study Goals
• Mechanisms
Fish Monitoring Goals
• Status– Human health advisories
• Trends
Special Study Goals
• Mechanisms
Special Study 1: Contaminant Mapping In the Estuary
(Data from RMP and BPTCP plotted by Eric Wittner, SFEI)
Special Study 2: Field Study Of Food Web Uptake
Sediment
Shiner Surfperch
White Croaker
Jacksmelt
Zooplankton
AlgaeGrass Shrimp
MollusksPolychaete Worms
Amphipods
Special Study 3: A PCB Food Web Model
Pattern…
And Mechanisms…
