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Science activity #50151, updated 29 April 2022

Summer Townet Survey

Description / purpose

The Summer Townet (STN) Survey was initiated in 1959 to determine relative distribution and abundance of young of the year (age-0) striped bass (Morone saxatilis) in the Delta. To predict fishery recruitment, the survey calculates an index to measure age-0 striped bass year class strength. This index is based on abundance when age-0 striped bass attain a mean length of 38.1 mm. In contrast, the delta smelt (Hypomesus transpacificus) index is the average of the first two survey indices. The delta smelt index was developed about 1990 in response to declining delta smelt abundance. It has proven valuable in gauging the health of the estuary;delta smelt abundance trend data was used as supporting evidence for their listing as threatened in 1992 under the Federal and State Endangered Species Acts. It appears that zooplankton data are also collected.

Linked science activities

None specified

Collaborators

None specified

Activity status

  • 1 Awarded / Initiating (2009)
  • 2 In progress / Ongoing (2009 - 2019)
  • 3 Complete

Funding summary

Total allocated funding: $0

Location

Subbasins
Delta regions

Geographic tags

ATLAS TRACT , BACON ISLAND , BETHEL ISLAND , BIG BREAK , BISHOP TRACT/DLIS-14 , BIXLER TRACT , BOULDIN ISLAND , BRACK TRACT , BRADFORD ISLAND , BRANNAN-ANDRUS , BROWNS ISLAND , BYRON TRACT , CACHE HAAS AREA , CANAL RANCH TRACT , CENTRAL STOCKTON , CHIPPS ISLAND , CLIFTON COURT FOREBAY , CONEY ISLAND , DEAD HORSE ISLAND , DECKER ISLAND , DLIS-01 [PITTSBURG AREA] , DLIS-02 [ANTIOCH AREA] , DLIS-03 [LOWER SHERMAN ISLAND] , DLIS-04 [WEST ISLAND] , DLIS-05 [DONLON ISLAND] , DLIS-06 [OAKLEY AREA] , DLIS-07 [KNIGHTSEN AREA] , DLIS-08 [DISCOVERY BAY AREA] , DLIS-09 [BYRON AREA] , DLIS-10 , DLIS-12 [PARADISE CUT] , DLIS-18 , DLIS-19 [GRIZZLY SLOUGH AREA] , DLIS-20 [YOLO BYPASS] , DLIS-21 , DLIS-22 [RIO VISTA] , DLIS-23 [GEORGIANA OXBOW] , DLIS-37 [CHADBOURNE AREA] , DLIS-41 [JOICE ISLAND AREA] , DLIS-42 [PEYTONIA ECO PRSRV] , DLIS-44 [HILL SLOUGH UNIT] , DLIS-62 , DLIS-63 [GRIZZLY ISLAND AREA] , DLIS-64 , DLIS 15-17 Lodi , DLIS 25-27 [Morrow Island] , DLIS 28-36 , DLIS 38-40 , DLIS 43,45 [Potrero Hills Area] , DLIS 46-61 , DREXLER POCKET , DREXLER TRACT , DUTCH SLOUGH , EGBERT TRACT , EHRHEARDT CLUB , EMPIRE TRACT , FABIAN TRACT , FAY ISLAND , GLANVILLE , GLIDE DISTRICT , GRAND ISLAND , HASTINGS TRACT , HOLLAND TRACT , HOLT STATION , HONKER BAY , HONKER LAKE TRACT , HOTCHKISS TRACT , IDA ISLAND , JERSEY ISLAND , JONES TRACT [LOWER AND UPPER] , KASSON DISTRICT , KING ISLAND , KINGS ISLAND , LIBBY MCNEIL , LIBERTY ISLAND , LISBON DISTRICT , LITTLE EGBERT TRACT , FRANKS TRACT , LITTLE MANDEVILLE ISLAND , LONG ISLAND , LOWER ROBERTS ISLAND , MAINTENANCE AREA 9 NORTH , MAINTENANCE AREA 9 SOUTH , MANDEVILLE ISLAND , MCCORMACK-WILLIAMSON TRACT , MCDONALD ISLAND , MCMULLIN RANCH , MEDFORD ISLAND , MEIN'S LANDING , MERRITT ISLAND , MIDDLE & UPPER ROBERTS ISLAND , MILDRED ISLAND , MOSSDALE ISLAND , NETHERLANDS , NEW HOPE TRACT , NORTH STOCKTON , PALM-ORWOOD , PARADISE JUNCTION , PEARSON DISTRICT , PESCADERO DISTRICT , PETERS POCKET , PICO-NAGLEE , PROSPECT ISLAND , QUIMBY ISLAND , RANDALL ISLAND , RECLAMATION DISTRICT 17 , RINDGE TRACT , RIO BLANCO TRACT , RIVER JUNCTION , ROUGH AND READY ISLAND , RYER ISLAND , SHERMAN ISLAND , SHIMA TRACT , SHIN KEE TRACT , STARK TRACT , STATEN ISLAND , STEWART TRACT , SUNRISE CLUB , SUTTER ISLAND , TERMINOUS TRACT , TWITCHELL ISLAND , TYLER ISLAND , UNION ISLAND EAST , UNION ISLAND WEST , UPPER ANDRUS ISLAND , VEALE TRACT , VENICE ISLAND , VICTORIA ISLAND , WALNUT GROVE , WALTHALL , WEBB TRACT , WEST SACRAMENTO , WETHERBEE LAKE , WINTER ISLAND , WOODWARD ISLAND , WRIGHT-ELMWOOD TRACT , YOLANO

Products and outputs

Type Title Description Views
Link Summer Townet Survey website URL for the IEP Summer Townet Survey 1
Link Summer Townet Survey Station Map Station map for the Summer Townet survey 1
Report The Tow-Net Survey Abundance Index for Delta Smelt Revisited This paper describes an evaluation of a new mid-su 0
Link Interagency Ecological Program (IEP) 2019 Work Plan and Funding This Work Plan reflects the annually‐planned 1
Report Quality Assurance Protocol California Department of Fish and Game Central Valley Bay Delta Branch, L QA/QC protocol for the Summer Townet Survey 0
Report Summer Townet Survey data management plan Data management plan for the IEP Summer Townet Sur 0

Type and context

Science action area

Unspecified

Management themes

Habitat management , Native species management

Science themes

Environmental conditions , Habitat changes , Species

Types

None specified

Science functions

None specified

Management actions

Natural environmental flows , Population enhancement of listed species

Science Topics

Mysis , Other zooplankton , Main channels , Sloughs , Chinook Salmon , Steelhead Trout , Green sturgeon , White Sturgeon , Delta Smelt , Longfin Smelt , Sacramento Splittail , Striped bass , Fish

Lead implementing organization

California Department of Fish and Wildlife [CDFW]

Partner implementing organizations

U.S. Bureau of Reclamation [USBR] , California Department of Water Resource [DWR] , California Department of Fish and Wildlife [CDFW]

Funding organizations

None specified

Funding programs

None specified

Funding sources

None specified