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

    Metadata Updated: June 10, 2023

    SWFSC FED Mid Water Trawl Juvenile Rockfish Survey: CTD 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 https://www.fisheries.noaa.gov/west-coast/science-data/molecular-ecology-and-genetic-analysis-california-salmon-and-groundfish and http://www.sanctuarysimon.org/projects/project_info.php?projectID=100118

    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.

    Downloads & Resources

    Dates

    Metadata Date August 29, 2022
    Metadata Created Date November 12, 2020
    Metadata Updated Date June 10, 2023
    Reference Date(s) August 29, 2022 (creation)
    Frequency Of Update

    Metadata Source

    Harvested from Pacific Fisheries Environmental Laboratory

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date August 29, 2022
    Metadata Created Date November 12, 2020
    Metadata Updated Date June 10, 2023
    Reference Date(s) August 29, 2022 (creation)
    Responsible Party Keith Sakuma (Point of Contact)
    Contact Email
    Guid erdFedRockfishCtd
    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 7ea28dbc-e3d7-41f5-860e-52cab93c9488
    Harvest Source Id 817069b7-5f4e-4664-9e6b-615af3dfcf2d
    Harvest Source Title Pacific Fisheries Environmental Laboratory
    Licence
    Lineage 2013-04-08 source files from Keith Sakuma (FED) to Lynn Dewitt (ERD) to Bob Simons (ERD) 2013-04-09 Bob Simons (erd.data@noaa.gov) converted data files for 1987-2011 from .csv to .nc with Projects.convertRockfish(). 2017-02-03 Bob Simons (erd.data@noaa.gov) 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]]]}
    Progress
    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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