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SWFSC FED Mid Water Trawl Juvenile Rockfish Survey, Surface Data, 1987-2015

Metadata Updated: June 10, 2023

SWFSC FED Mid Water Trawl Juvenile Rockfish Survey: Station Information and Surface Data. Surveys have been conducted along the central California coast in May/June every year since 1983. In 2004 the survey area was expanded to cover the entire coast from San Diego to Cape Mendocino. The survey samples a series of fixed trawl stations using a midwater trawl. The midwater trawl survey gear captures significant numbers of approximately 10 rockfish species during their pelagic juvenile stage (i.e., 50-150 days old), by which time annual reproductive success has been established. Catch-per-unit-effort data from the survey are analyzed and serve as the basis for predicting future recruitment to rockfish fisheries. Results for several species (e.g., bocaccio, chilipepper [S. goodei], and widow rockfish [S. entomelas]) have shown that the survey data can be useful in predicting year-class strength in age-based stock assessments.

The survey's data on YOY Pacific whiting has also been used in the stock assessment process. To assist in obtaining additional northward spatial coverage of YOY Pacific whiting off Oregon and Washington, in 2001 the Pacific Whiting Conservation Cooperative in cooperation with the NOAA NMFS Northwest Fisheries Science Center began a midwater trawl survey patterned after the NOAA NMFS SWFSC Fisheries Ecology Division's (FED) existing survey. Both surveys work cooperatively together each year in order to resolve interannual abundance patterns of YOY rockfish and Pacific whiting on a coastwide basis, which provides expedient, critical information that can be used in the fisheries management process.

The large quantity of physical data collected during the surveys (e.g., CTD with attached transimissometer and fluorometer, thermosalinometer, and ADCP) have provided a better understanding of the hydrographic conditions off the California coast and analysis of these data have been distributed through the publication of NOAA NMFS Technical Memoranda.

For more information, see and

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date August 29, 2022
Metadata Created Date July 21, 2022
Metadata Updated Date June 10, 2023
Reference Date(s) August 29, 2022 (creation)
Frequency Of Update

Metadata Source

Harvested from Pacific Fisheries Environmental Laboratory

Additional Metadata

Resource Type Dataset
Metadata Date August 29, 2022
Metadata Created Date July 21, 2022
Metadata Updated Date June 10, 2023
Reference Date(s) August 29, 2022 (creation)
Responsible Party NOAA SWFSC FED (Point of Contact)
Contact Email
Guid erdFedRockfishStation
Access Constraints
Bbox East Long -117.323
Bbox North Lat 44.50116
Bbox South Lat 32.53783
Bbox West Long -126.0017
Coupled Resource [{"title": [], "href": ["#DataIdentification"], "uuid": []}, {"title": [], "href": ["#DataIdentification"], "uuid": []}, {"title": [], "href": ["#DataIdentification"], "uuid": []}]
Frequency Of Update
Harvest Object Id 221fd341-642a-415d-82a1-f611b793d8d4
Harvest Source Id 817069b7-5f4e-4664-9e6b-615af3dfcf2d
Harvest Source Title Pacific Fisheries Environmental Laboratory
Lineage 2013-04-08 source files from Keith Sakuma (FED) to Lynn Dewitt (ERD) to Bob Simons (ERD) 2013-04-09 Bob Simons ( converted data files for 1987-2011 from .csv to .nc with Projects.convertRockfish(). 2017-02-03 Bob Simons ( converted data files for 2012-2015 from xlsx to .nc with Projects.convertRockfish().
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-126.0017, 32.53783], [-117.323, 32.53783], [-117.323, 44.50116], [-126.0017, 44.50116], [-126.0017, 32.53783]]]}
Spatial Data Service Type ERDDAP tabledap
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1987-05-24T02:10:00Z
Temporal Extent End 2015-06-14T11:51:00Z

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