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ERDDAP > info > nwioosObsTrawl2002

Title Sum-
Institution Dataset ID
   set  data   graph     public NWFSC Observer Trawl Data, off West Coast of US, 2002-2006    ?   F   I   M   background (external link) RSS Subscribe NOAA NWFSC nwioosObsTrawl2002

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL Easternmost_Easting double -120.9478988647461
attribute NC_GLOBAL geospatial_lat_max double 48.48893356323242
attribute NC_GLOBAL geospatial_lat_min double 34.876041412353516
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -120.9478988647461
attribute NC_GLOBAL geospatial_lon_min double -125.75164794921875
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String (external link)
attribute NC_GLOBAL institution String NOAA NWFSC
attribute NC_GLOBAL keywords String 2002-2006, coast, common, data, discard, Earth Science > Biological Classification > Animals/Vertebrates > Fish, Earth Science > Biosphere > Aquatic Ecosystems > Coastal Habitat, Earth Science > Biosphere > Aquatic Ecosystems > Marine Habitat, Earth Science > Oceans > Aquatic Sciences > Fisheries, fishery, grid, identifier, name, noaa, nwfsc, observer, off, rate, scientific, survey, system, taxonomy, time, trawl, west, west coast, years
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.
attribute NC_GLOBAL Northernmost_Northing double 48.48893356323242
attribute NC_GLOBAL sourceUrl String (external link)
attribute NC_GLOBAL Southernmost_Northing double 34.876041412353516
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL subsetVariables String fishery, survey_years, grid_id, longitude, latitude, common_name, scientific_name, sys_id
attribute NC_GLOBAL summary String Observer Trawl Data collected during 2002-2006 off West Coast of US.

This data product originates from data collected by fishery observers in the West Coast Groundfish Observer Program (WCGOP), Fishery Resource Analysis and Monitoring Division (FRAM) at the Northwest Fisheries Science Center, NOAA Fisheries. The WCGOP's goal is to improve total catch estimates by collecting information on the discarded catch (fish returned overboard at-sea) of west coast groundfish species. All data were collected according to standard protocols and data quality control established by the WCGOP. The observed portion of overall catch or landings in a fishery varies by coverage level. Since all fishing operations are not observed, neither the maps nor the data can be used to characterize the fishery completely. This is especially true for rarely-occurring species and when observed sample sizes are small. We urge caution when utilizing these data due to the complexity of groundfish management and fleet harvest dynamics. Grid cells representing less than 3 vessels and less than 10 hauls or sets are not shown due to confidentiality and to ensure adequate sample size. In the limited-entry groundfish bottom trawl fishery, species discard rates (species discard weight / groundfish total catch (discard + retained weight)) are categorized by approximate quartile ranges and geo-referenced to 10 x 10 kilometer grid cells. The observed trawl towline (line drawn from the start to end location of a trawl tow) was used to allocate data to 10 x 10 kilometer grid cells for calculation. Seventeen species were represented based on combined observer data from 2002-2006. The species included in this data product are dover sole (Microstomus pacificus), sablefish (Anoplopoma fimbria), longspine thornyhead (Sebastolobus altivelis), shortspine thornyhead (Sebastolobus alascanus), lingcod (Ophiodon elongatus), arrowtooth flounder (Atheresthes stomias), English sole (Parophrys vetulus), petrale sole (Eopsetta jordani), and the rockfishes (genus Sebastes), darkblotched rockfish (S. crameri), Pacific ocean perch (S. alutus), chilipepper (S. goodei), cowcod (S. levis), bocaccio (S. paucispinis), canary rockfish (S. pinniger), widow rockfish (S. entomelas), yelloweye rockfish (S. ruberrimus), and yellowtail rockfish (S. flavidus).

Purpose: This data product was developed to provide basic groundfish discard distribution information for a wide variety of audiences. The West Coast Groundfish Observer Program conducts sampling of groundfish discarded by commercial fisheries along the entire continental U.S. West Coast. The seventeen species included in this data product are among those of most interest to the fisheries management and commercial fishing communities.

Data Credits: NOAA Fisheries, Northwest Fisheries Science Center, Fishery Resource Analysis & Monitoring Division, West Coast Groundfish Observer Program, Seattle, WA.
attribute NC_GLOBAL title String NWFSC Observer Trawl Data, off West Coast of US, 2002-2006
attribute NC_GLOBAL Westernmost_Easting double -125.75164794921875
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range double -125.75164794921875, -120.9478988647461
attribute longitude axis String X
attribute longitude colorBarMaximum double -119.75
attribute longitude colorBarMinimum double -125.85
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude (Center of 10x10 km Grid Cell)
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude actual_range double 34.876041412353516, 48.48893356323242
attribute latitude axis String Y
attribute latitude colorBarMaximum double 48.54
attribute latitude colorBarMinimum double 34.82
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude (Center of 10x10 km Grid Cell)
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable grid_id   double  
attribute grid_id actual_range double 5302.0, 21725.0
attribute grid_id colorBarMaximum double 23000.0
attribute grid_id colorBarMinimum double 5000.0
attribute grid_id Description String Unique grid cell identifier.
attribute grid_id ioos_category String Location
attribute grid_id long_name String Grid ID
variable survey_years   String  
attribute survey_years Description String Time period of combined data: 2002-2006.
attribute survey_years ioos_category String Time
attribute survey_years long_name String Survey Years
variable fishery   String  
attribute fishery Description String Groundfish fishery sector by permit and gear-type.
attribute fishery ioos_category String Identifier
attribute fishery long_name String Fishery
variable common_name   String  
attribute common_name Description String The common name used to identify a species.
attribute common_name ioos_category String Taxonomy
attribute common_name long_name String Common Name
variable scientific_name   String  
attribute scientific_name Description String The scientific name used to identify a species.
attribute scientific_name ioos_category String Taxonomy
attribute scientific_name long_name String Scientific Name
variable discard_rate   double  
attribute discard_rate colorBarMaximum double 0.5
attribute discard_rate colorBarMinimum double 0.0
attribute discard_rate Description String Discard rate calculated as the species discard weight divided by the total catch (discard + retained) weight of groundfish in the 10 km x 10 km grid cell.
attribute discard_rate ioos_category String Other
attribute discard_rate long_name String Discard Rate
variable sys_id   double  
attribute sys_id actual_range double 1.0, 5289.0
attribute sys_id colorBarMaximum double 6000.0
attribute sys_id colorBarMinimum double 0.0
attribute sys_id Description String Unique system identifier.
attribute sys_id ioos_category String Identifier
attribute sys_id long_name String System ID

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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