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Beach Seine
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A weekly beach seining survey is conducted 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. All native and non-native fishes are identified, measured, and enumerated.
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Net - 15m by 1.3m seine
Crew - two biologists/technicians
Sampling effort - 49 regular sampling sites broken into 6 biological regions:
(Lower Sacramento River, North Delta, Central Delta, South Delta, San Joaquin River, and San Francisco Bay)
Starting in the mid-1970's, beach seining has been conducted at numerous
locations (Sampling Map) in the Lower
Sacramento and San Joaquin Rivers, the Delta, and the San Francisco,
Suisun, and San Pablo Bay areas. For specific details on the beach seining
program please see Reports. Each site
is seined between two and four times monthly. |
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