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Descriptors in Document File

Program Element
     Name of study: Clifton Court Forebay (CCF) Entrainment-Predation Loss
                    Program; Predator Catch-per-unit-effort (CPUE)

     Program manager
          Name:     Bob Fujimura
          Agency:   Bay-Delta Division of the Department of Fish and Game
          Address:  4001 N. Wilson Way, Stockton, CA  95205

          Phone:    (209) 948-7094

     Purpose/Objective:  To monitor the catch rates of predator size fish
                         in CCF.

     Geographic range of field work:
              Clifton Court Forebay is bounded by:    
              LAT 37  51.4' and LAT 37  49.3'
              LON 121  33.3' and LON 121  35.6'  

     Number of sites: Six

     Period of record (Start year): 1991

     Size for complete data base for program element in KB (MB):
              502 KB  (1991-1994)

     Number of individual files:  12

     Sample frequency per time unit (second, week, month):
              Weekly from March 1991 through September 1992. 
              Biweekly from October 1992 through December 1994.  
              Weekly from January 1995 to present, with night sampling
              every other week.
     General category of data collected (e.g., media, flow, physical,
     common chemicals, metals, pesticides, nutrients, chlorophyll, fish,
     invertebrates, or phyto/zooplankton):
              Date and time; start and end times used to calculate sample
              Temperature data, C or F;
              Turbidity data, measured in centimeters using a secchi disk;
              Salinity; conductivity readings in mMho;
              Gear type; gill-net (large variable mesh), hook and line;
              Fish Species, species code, numbers caught, fork lengths
                (in millimeters).

     Comments about element (e.g., idiosyncracies, changes over time, special
              Weekly from 3/91-9/92, then biweekly through 1994.
              Weekly from January 1995 and night sampling biweekly.
Field Sampling
     Gear type or field instrument used:
              Variable mesh gill net (200' with 2.5" to 4" stretch
                mesh panels)
              Rod and reel using scroungers

     Brief description of sampling procedure, including sub-sampling,
     sorting, identification of organisms (this should include procedures
     for transport of sample from field to lab):
                   CCF is approximately 3 miles southeast of
              Byron, California. The forebay was created in
              1969 by inundating a 2,200-acre tract.  It has
              a length of about 2.6 miles and breadth of 2.1
              miles.  The perimeter is 7 miles.  Annual
              fluctuation in water surface level can be as
              much as 4 feet, but daily ranges are about 0.7
              feet.  Average water depth is 9 feet.  Maximum
              depths are inside the radial gates (20 feet)
              and in the outlet channel (28 feet).
                   Sampling is conducted during the day on a weekly
              basis and biweekly at night.  There are six sampling
              areas, each sampled randomly on the designated
              sampling day.  Gill nets are fished 20-25 minutes
              and hook and line sampling is conducted during the
              gill net sets or when gill net fishing is not practical.
                   Fish captured in gill nets and by angling
              are processed immediately by the boat
              operator.  Processing entails identification
              and measurement of all species.  Each fish is
              identified to species.  Lengths of fish are
              measured in millimeters.  Fork lengths (FL)
              are taken for appropriate species.  Fish
              without forked tails are measured to total
              length (TL).  Fish are released after processing.
    Reference to any written protocols and how to obtain a copy:
              A disk file with quality control protocols available in
              WordPerfect 6.0 from Bay-Delta and Special Water Projects
              Division, 4001 N. Wilson Way Stockton, CA 95205, CPUE_QC
   Changes in gear or procedures which affected the data over time:

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

Laboratory analysis - Biological
   Name and address of laboratory(s) running analysis:
   Current since (date):
   Historical lab(if known) or reference to other documentation:
   Methodology for each analysis:
   Current procedure since (date):
   Historical procedures (if known) or reference to other documentation:
   Reference used for identification of organisms:
          Keys or descriptions used in fish identification include:
          Moyle, Inland Fishes of California;
          Eddy, How to Know the Freshwater Fishes;
          Calif. Dept. Fish and Game, Warmwater Gamefish of California;
          Fry, Anadromous Fish of California; or,
          Kimsey, Freshwater Non-Game Fish of California.
          Identification of uncommon or unusual fish should be verified by
          an authority familiar with the species. 
   Location of reference collection (if one exists):
          Reference collections of species occurring in the Delta are also
          available.  These collections are maintained by the Fish Salvage
          Project (810), and the San Francisco Bay Study Project.
   Reference to table listing scientific name, common name (if any),
      and code used:  available in the Data Cross-reference file.