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Weekly beach seining surveys are used to estimate the relative inter- and
intra-annual abundance and distribution of all races of salmonid fry, using the
Delta as a rearing and nursery area.
Beach seining has been conducted since 1976 on the Sacramento River and in
the Northern and Central Delta. There was also a circuit done in the
San Francisco/San Pablo Bay areas in the 1980's. The Southern Delta and
San Joaquin River regions were not added until 1993 and 1994, respectively.
Net - 15m by 1.3m beach seine
Crew - two biologists/technicians
Sampling effort - 49 regular sampling sites broken into
5 biological regions (Lower Sacramento River, North Delta,
Central Delta, South Delta, and San Joaquin River) each
seined weekly
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