exposure & effects pilot study (eeps) rmp objective #4 measure pollution exposure and effects on...
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Exposure & Effects Pilot Study (EEPS)
RMP Objective #4Measure pollution exposure and effects on
selected parts of the Estuary ecosystem (including humans)
EEPS goals:Develop a suite of indicators for S&TConduct short-term studies to assess SF
Bay E&E
2003 Program Review:Recommendation for EEPS
Great chemical characterization of the Bay but what does it mean?Recommendation: need to
understand biological impacts of chemicals detected
In response, TRC/SC allocated $200K/yr for EEPS thru 2008
EEPS: Selection of IndicatorsRationale presented in ConceptualFramework (Hunt et al., 2004)
Fish
Clapper rails
Benthos/sediment
Terns
Cormorants
EEPS Projects – 2005
Avian Se Analysis of Diving Ducks $20K Hg Analysis of Tern Eggs $ 4K
Fish Analysis of Hg in Small Fish (3 Yr)
$50K E&E on Shiner Surfperch (2 Yr) $60K
Benthos Sediment Assessment $15K Benthic Archive $ 6K
EEPS 2005 & 2006 Avian
2005: Se in diving ducks Report early 2006 (2005 and 2002 data)
2005: Hg in Forster, Least, and Caspian tern eggsReport early 2006
2006: Egg injection study?
EEPS Fish 2005, 2006 & 2008: Small Fish Mercury Project
Understanding impact of management actions
Small fish – an ideal monitoring tool Accumulate MeHg Integrate over fixed time (1-yr) Indicate spatial variation Indicate risk to piscivorous wildlife
Activities coordinated with SBSP, IEP and CalFed FMP
EEPS: Small Fish Hg ProjectStudy Design
4 near restoration projects4 near existing marshes2 additional sites (IEP)
Pelagic species: Topsmelt and Inland silversides
Benthic species:Arrow goby, Cheekspot goby, and Shimofuri goby,Bay goby from deep water
Study Design
Plans for 2006Sample 8 sitesObtain additional funding
EEPS Fish 2006: Small Fish Hg Project
Inland silversides
Bay goby
Shimofuri goby
EEPS 2005 & 2006: Shiner Surf Perch
Study Goal: Determine if shiner surfperch show effects
of contamination on some aspect of their fitness, growth or reproduction.
Difficult to demonstrate effects Work undertaken by AMS and UC-Davis
EEPS 2005 & 2006: Shiner Surf Perch
Strategy: Yr 1: Field study measuring growth and
reproduction Yr 2: Lab study on effects of mixtures on growth
and fitness Yr 2: Develop population models explaining role of
contaminants
EEPS – 2005 Shiner Surf Perch
Collection of Fish 3 contaminated sites in Bay
(Oakland Middle Harbor, Candlestick, and IEP station)
1 reference site (Big River Mendocino)
Fish measured, weighed, dissected, sexed, young counted and weighed, and tissues stored.
Initiated evaluation of biomarkers (P-450 induction, histopathology, and vitellogenin).
EEPS – 2005 Shiner Surf Perch Study
Preliminary results: Skewed sex ratios toward females. All fish livers positive for
vitelloginen antibodies. All fish positive for P-450 induction.
Results suggest need to identify new reference site
EEPS – 2006 Shiner Surf Perch Study
For 2006: Identify new reference site Develop laboratory culture Continue to evaluate biomarkers Develop anti-body tests for EDC Continue to examine fish for effects
and sex ratios
Additional EEPS Projects 2006
BenthosSediment effects
$40K
EEPS: Incorporation of Indicators into S&T
Cormorants Biannual (e.g., 2002 and 2004)Presentation at March TRC for 2006 S&T
BenthosBaseline for SQOPresentation today for 2007 S&T