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…