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Georgiana Slough Acoustic Barrier Test, Spring 1995

Program Manager: 
Darryl Hayes
California Department of Water Resources
3251 S Street, Sacramento CA 95816
(916) 227-7546

The purpose of this project is to determine the effectiveness and
feasibility of utilizing acoustic barriers to guide out-migrating
salmon down the Sacramento River.  Unfortunately, high flows in the
Sacramento River and equipment problems prevented the installation
of the barrier.  Therefore, baseline fisheries data collection using
Kodiak trawls at the site were conducted.  Extended sound exposure
testing on juvenile chinook salmon, splittail, and delta smelt in the
field laboratory were also conducted during the study.  Data is
currently unavailable for the exposure testing.

Geographic range of field work:
Data collection and testing were conducted at the confluence of the
Sacramento River and Georgiana Slough:  380 14' 20" N, 1210 31' 0" W

Number of sites: 
	Baseline fisheries data collection:
Two main sampling locations were utilized for the baseline fisheries
data collection, one downstream of the confluence in the Sacramento
River and one downstream of the confluence in Georgiana Slough.

Period of record:
This database covers the spring 1995 study.

Size for complete database:

Sample frequency per time unit:
	Baseline fisheries data collection: 
The project strived to take 10 minute samples 24 hours a day using
one Kodiak trawling team.  One set consists of six trawls:  Three
trawls were performed in the Sacramento river (one on the left, one
in the middle, and one on the right).  Then the boats moved to
Georgiana Slough and performed three trawls in the center (the slough
was too narrow to perform bank trawls).  The trawls were performed
Monday through Thursday from 4/26/95 through 6/29/95 (the permit did
not allow for trawling Friday through Sunday). 

General category of data collected:
	Baseline fisheries data collection:
The type of data collected were the species and fork length of each
fish caught per trawl.  If the chinook salmon were tagged or marked,
this data and the color of the mark was noted.  In addition, the water
temperature, turbidity, weather, and flow meter start and end numbers
were recorded.

Gear type or field instrument used:
	Baseline fisheries data collection:
The type of gear used was Kodiak trawl.  The Kodiak trawl has a graded
stretch mesh, from 2-inch mesh at the mouth to 1/4-inch mesh at the
cod end.  Its overall length is 65 feet, and the mouth opening is
6 feet deep and 25 feet wide.

Brief description of field sampling procedure:
	Baseline fisheries data collection: