Kodiak Trawl For Chinook Salmon

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The kodiak trawl experimentally replaced the midwater trawl at Sacramento in December 1994 with the hypothesis that the larger volume sampled by the kodiak trawl will allow us to better detect the scarce winter run and larger sized late-fall run chinook salmon better than the midwater trawl. The kodiak trawl survey at Sacramento (SR055X) is used to estimate the relative abundance and timing of midchannal juveniles entering the delta.

The kodiak trawl is planned from October through June, or potentially year round if resources are available.

	Vessel (2) - 7.3m V8 inboard/outboard gas powered center 
        console boat and a 6.7m V6 outboard gas powered center console boat

	Crew - two boat operators and three or four deckhands, depending on
        flow conditions

	Net specifications - 1.8m by 7.6m with a cod end mesh size of 0.32cm
		

	Sampling effort - ten 20 minute trawls when river conditions permit 
        four days per week.