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Program Element

     Name of study:  Sturgeon Spawning Survey
 
     Program manager
          Name:     David Kohlhorst
          Agency:   Department of Fish and Game
          Address:  4001 N. Wilson Way
                    Stockton, CA 95205-2424
          Phone:    (209) 948-7800
 
     Purpose/Objective:  To determine factors affecting sturgeon spawning 
migration behavior and spawning site selection.
 
     Geographic range of field work:  Sacramento River from Rio Vista to 
Hamilton City.
 
     Number of sites:  n/a
 
     Period of record (Start year):  1990
 
     Size for complete data base for program element in KB (MB): 140 KB 
(in LOTUS123 files)
 
     Number of individual files:  2
 
     Sample frequency per time unit (second, week, month): 
Radio-tracking: several times/week from February to June; artificial 
substrate sampling for eggs: 2/week from February to June.
 
     General category of data collected (e.g., media, flow, physical, 
common chemicals, metals, pesticides, nutrients,  chlorophyll, fish, 
invertebrates, or phyto/zooplankton):  fish
 
     Comments about element (e.g., idiosyncracies, changes over time, 
special events, etc.):
 

Field Sampling

     Gear type or field instrument used:  baited set line, radio 
receiver, artifical substrates of plasticised animal hair
 
     Brief description of sampling procedure, including sub-sampling, 
sorting, identification of organisms  (this should include procedures for 
transport of sample from field to lab):
     Adult sturgeon are captured with baited set lines in the Sacramento 
River near Clarksburg and fitted with a radio transmitter.  Fish are 
tracked on their spawning migration until they can no longer be detected.  
Specific spawning site are determined by deploying artificial substrates 
in transects across the Sacramento River at up to six locations at a 
time.  Sturgeon eggs recovered from the substrates are preserved in 
formalin and returned to the lab for age determination.  Each time the 
substrates are examined, water velocity, depth, temperature, turbidity, 
and transparency are recorded.  When the artificial substrates are 
initially deployed, natural substrate is collected and classified.
 
     Reference to any written protocols and how to obtain a copy:  n/a
 
     Changes in gear or procedures which affected the data over time:
 
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:  
     Department of Fish and Game,
     4001 N. Wilson Way, Stockton, CA 95205-2424
 
     Current since (date):  1991
     Historical lab(if known) or reference to other documentation:  n/a
 
     Methodology for each analysis:  Age of preserved sturgeon eggs is 
estimated based on development times described in: Conte et al. 1988.  
Hatchery manual for the white sturgeon with application to other North 
American Acipenseridae.  Cooperativ Extension, University of California, 
Division of Agriculture and Natural Resources, Publication 3322.
 
     Current procedure since (date):  1991
     Historical procedures (if known) or reference to other 
documentation:  n/a
 
     Reference used for identification of organisms:  n/a
 
     Location of reference collection (if one exists):  n/a
 
     Reference to table listing scientific name, common name (if any), 
and code used:
     Acipenser transmontanus, white sturgeon, species 2
     Acipenser medirostris, green sturgeon, species 3