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   set  data   graph     public NWFSC Groundfish Data for U.S. West Coast (2003-2005)    ?   F   I   M   background (external link) RSS Subscribe NOAA NWFSC nwioosGroundfish

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL cdm_data_type String Trajectory
attribute NC_GLOBAL cdm_trajectory_variables String haul_id
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL Easternmost_Easting double -117.2755126953125
attribute NC_GLOBAL featureType String Trajectory
attribute NC_GLOBAL geospatial_lat_max double 48.452476501464844
attribute NC_GLOBAL geospatial_lat_min double 32.5355224609375
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -117.2755126953125
attribute NC_GLOBAL geospatial_lon_min double -125.86019134521484
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String http://nwioos.coas.oregonstate.edu:8080/dods/drds/Groundfish%20Survey%202003-2005.info (external link)
attribute NC_GLOBAL institution String NOAA NWFSC
attribute NC_GLOBAL keywords String Biosphere > Aquatic Ecosystems > Coastal Habitat,
Biosphere > Aquatic Ecosystems > Marine Habitat,
Biological Classification > Animals/Vertebrates > Fish,
Oceans > Aquatic Sciences > Fisheries,
2003-2005, abundance, beginning, catch, coast, common, data, description, fish, fish abundance, groundfish, haul, identifier, legend, map, max, min, name, noaa, nwfsc, position, range, scientific, survey, taxonomy, time, u.s., west, west coast, year
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 48.452476501464844
attribute NC_GLOBAL sourceUrl String http://nwioos.coas.oregonstate.edu:8080/dods/drds/Groundfish%20Survey%202003-2006 (external link)
attribute NC_GLOBAL Southernmost_Northing double 32.5355224609375
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v29
attribute NC_GLOBAL subsetVariables String haul_id, longitude, latitude, time, common_name, scientific_name, position_description
attribute NC_GLOBAL summary String The data available for downloading is summarized data from the 2003-2005
U.S. West Coast Bottom Trawl Survey (WCGTS) of Groundfish Resources off
Washington, Oregon and California.

The Northwest Fisheries Science Center's Fishery Resource Analysis and
Monitoring Division (FRAM) completed the sixth in an annual series of
groundfish bottom trawl surveys in 2003. The survey was conducted June
24 to October 23, 2003 and targeted the commercial groundfish resources
inhabiting depths of 55 to 1,280 meters [m], (30 - 700 fathoms [fm])
from the area off Cape Flattery, Washington (latitude [lat.] 48°10'N)
to the U.S.-Mexican border (lat. 32°30'N) using chartered West Coast
commercial trawlers. These ongoing series of annual surveys, conducted
by FRAM since 1998, are designed to monitor long-term trends in
distribution and abundance of west coast groundfish, especially those
species of management concern. The 2003 survey represents the first
year in which the depth range was expanded to include both the
continental shelf (55 - 183 m) and continental slope (183 - 1,280 m)
area and the first year in which a stratified-random sampling design
was adopted.

In 2003, a total of 574 successful tows were completed out of 643
attempts. Simrad ITI net mensuration data, as well as global
positioning system (GPS) navigation data and bottom contact sensor
data, used to document performance (e.g. bottom tending), were
obtained for most tows.

An Aberdeen-style net with a small mesh (2" stretched measure or less)
liner in the codend (to retain smaller specimens) was used to sample
fish biomass. Target duration of each tow was 15 minutes. Tow
duration was the time between touchdown and lift-off of the trawl net
from the seafloor based on readings from bottom contact sensors.

Catches were sorted to species, aggregate or other appropriate
taxonomic level and then weighed using an electronic,
motion-compensated scale. A total of 517 species or families (fish
and invertebrates) were identified within the survey area. Although
biological sampling effort continues to include Dover sole
(Microstomus pacificus), shortspine thornyhead (Sebastolobus
alascanus), longspine thornyhead (Sebastolobus altivelis), and
sablefish (Anoplopoma fimbria), focus has increasingly shifted to
encompass all groundfish species of management concern. Up to 100
length measurements, sex determinations, and individual weights
and up to 25 age structures were collected per haul for these species.
attribute NC_GLOBAL time_coverage_end String 2006-01-01T00:00:00Z
attribute NC_GLOBAL time_coverage_start String 2003-01-01T00:00:00Z
attribute NC_GLOBAL title String NWFSC Groundfish Data for U.S. West Coast (2003-2005)
attribute NC_GLOBAL Westernmost_Easting double -125.86019134521484
variable haul_id   double  
attribute haul_id actual_range double 2.003030016E11, 2.00603025408E11
attribute haul_id cf_role String trajectory_id
attribute haul_id ioos_category String Identifier
attribute haul_id long_name String Haul Identifier
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range double -125.86019134521484, -117.2755126953125
attribute longitude axis String X
attribute longitude colorBarMaximum double -115.0
attribute longitude colorBarMinimum double -135.0
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
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 32.5355224609375, 48.452476501464844
attribute latitude axis String Y
attribute latitude colorBarMaximum double 55.0
attribute latitude colorBarMinimum double 30.0
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable time   double  
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.0413792E9, 1.1360736E9
attribute time axis String T
attribute time Description String Year the survey cycle was performed.
attribute time ioos_category String Time
attribute time long_name String Time (Beginning of Survey Year)
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
variable scientific_name   String  
attribute scientific_name ioos_category String Taxonomy
attribute scientific_name long_name String Scientific Name
variable common_name   String  
attribute common_name ioos_category String Taxonomy
attribute common_name long_name String Common Name
variable position_description   String  
attribute position_description Description String Type of position reported for the haul, typically the gear track midpoint or the vessel track midpoint.
attribute position_description ioos_category String Location
attribute position_description long_name String Position Description
variable catch_range_min   double  
attribute catch_range_min actual_range double 0.0, 4530.0
attribute catch_range_min colorBarMaximum double 4500.0
attribute catch_range_min colorBarMinimum double 0.0
attribute catch_range_min Description String Catch range minimum (catch per unit effort in kilograms per square meter).
attribute catch_range_min ioos_category String Fish Abundance
attribute catch_range_min long_name String Catch Range Min
attribute catch_range_min units String kg km-2
variable catch_range_max   double  
attribute catch_range_max actual_range double 0.0, 257606.0
attribute catch_range_max colorBarMaximum double 250000.0
attribute catch_range_max colorBarMinimum double 0.0
attribute catch_range_max Description String Catch range maximum (catch per unit effort in kilograms per square meter).
attribute catch_range_max ioos_category String Fish Abundance
attribute catch_range_max long_name String Catch Range Max
attribute catch_range_max units String kg km-2
variable map_legend   String  
attribute map_legend colorBarMaximum double 250000.0
attribute map_legend colorBarMinimum double 0.0
attribute map_legend Description String Indicates the catch per unit effort range that characterizes the haul catch for a species. Catch ranges are bounded by whole number standard deviation increments. Zero catch is indicated in a distinct category.
attribute map_legend ioos_category String Fish Abundance
attribute map_legend long_name String Map Legend
attribute map_legend units String kg km-2

This information is also available in other file formats (.csv, .htmlTable, .json, .mat, .nc, .tsv, .xhtml) via a RESTful web service.
 


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