Purpose
To evaluate potential water project effects
on survival of young striped bass.
The objective of the fall midwater trawl survey is to
produce an index of monthly abundance of young striped bass.
The sum of the monthly indices is compared to
the summer townet abundance index to evaluate survival.
Midwater Trawl Field Activities:
From 1967 to 1978 the survey length was variable, sometimes
starting in July or August, with September the usual
starting month. The survey was never run beyond March. In
1980 the survey was shortened to cover the period of
September to December due to variability in abundance
indices associated with winter storm events.
Midwater trawl Sampling stations cover a broad range of
habitats.
Equipment
Net Description - It has a mouth opening of 12
foot by 12 foot (3.7 m2). The mesh size decreases from 8 inch
mesh in the forward panel to one half inch mesh at the cod end.
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