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Southern Delta Entrainment Monitoring – Metadata

Program Element         

       Name of study: Delta Egg and Larval Entrainment Study

       Program manager

             Name: Katherine Wadsworth
	     Agency: Department of Water Resources
             Address: 3251 S Street
             Phone: (916) 227-0180

       Purpose/Objective: Determine estimated entrainment losses of eggs
of striped bass (SB), and larvae of SB and other species of concern to 
State Water Project, Central Valley Project, and North Bay Aqueduct. 

       Geographic range of field work: Central and southern Delta and 
Barker/Lindsey Sloughs (northwest Delta).

       Number of sites: 16 presently

       Period of record (Start year): 1985 - 7 sites, southern Delta; 
1991, 1992 - 5 sites, central Delta; 1986 - Barker/Lindsey Sloughs.

       Size for complete data base for program element in KB (MB):  20MB

       Number of individual files:  100-120 files

       Sample frequency per time unit (second, week, month): Study runs
Feb-July: sampling every fouth day Feb-March;  every other day 
April-July; 1 sample per site per sample day.

       General category of data collected (e.g., media, flow, physical, 
common chemicals, metals, pesticides, nutrients, chlorophyll, fish, 
invertebrates, or phyto/zooplankton):

       Physical: EC, Secchi depth, water temperature, tide, volume of water sampled.

       Biological: egg and larvae of fish.

       Comments about element (e.g., idiosyncracies, changes over time, special events, etc.):

       Addition of sites since 1985, original study had 7 sites. Tidal study conducted in 1988-89.

Field Sampling

       Gear type or field instrument used: egg and larval sled, with 505 micron mesh net

       Brief description of sampling procedure, including sub-sampling, 
sorting, identification of organisms  (this should include procedures 
for transport of sample from field to lab):

       Samples collected by a single 10-minute oblique tow with an egg 
and larval net mounted on a towing frame with skis.  A 1000 mL plastic 
collecting jar, screened with 470-micron mesh bolting cloth, is attached 
at the cod end to collect samples.  After each tow, contents of net are 
rinsed into collecting jar.  Samples are preserved in 5% formalin with 
rose-bengal dye for transport to lab.  Sampling methods are the same as 
those used by the Department of Fish and Game in its Delta-wide egg and 
larval sampling program.

       Reference to any written protocols and how to obtain a copy: 1993 Work Plans, IESP

       Changes in gear or procedures which affected the data over time:  
       Delta smelt identification reliable from 1989 and on.

Laboratory analysis - Chemical

       Name and address of laboratory(s) running analysis: N/A
       Current since (date): N/A
       Historical lab (if known) or reference to other documentation: N/A
       Analytical methodology for each parameter or group of parameters: N/A 
       Reference to table which lists detection limits for each parameter: N/A
       Current procedure since (date): N/A
       Historical procedures (if known) or reference to other documentation: N/A
       Quality assurance/control (QA/QC) protocols (if brief) or one-line qualifier: N/A
       Reference to any written QA/QC protocols and how to obtain a copy: N/A

Laboratory analysis - Biological

       Name and address of laboratory(s) running analysis:  

          Johnson Wang, PhD - National  
          Environmental Services, Inc.  
          1758 Concord Ave.  
          Concord, CA 94520

       Current since (date):  1988

       Historical lab(if known) or reference to other documentation:  
          Department of Fish and Game - 4001 North Wilson Way Stockton  Stockton, CA 95205

Methodology for each analysis: Samples are rinsed with water through a No. 50 sieve
(300-micron mesh), sorted under a magnifying illuminator, all 
eggs and larvae are removed and counted.  Processing is subject to a 
strict quality control program.  Eggs and larvae are identified to 
species, where possible;  striped bass eggs are classified as dead, 
morula, early or late embryo.  About 5% of identifications are reworked.
All striped bass and delta smelt are measured to tenth of a millimeter 
standard length.

       Current procedure since (date): 1988

       Historical procedures (if known) or reference to other 
documentation: Basically the same as present, see IESP Technical Report
13 (Raquel 1987).
       Reference used for identification of organisms: Larval fish 
reference collection of more than 125 species collected by Dr. Wang in 
1978-1992; Wang (1986 and 1990, 2 editions); revision of Wang (1981).
       Location of reference collection (if one exists): DWR, 3251 S 
St., Sacramento and contract lab indicated above.
       Reference to table listing scientific name, common name (if any), 
and code used: No codes used.