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Dataset Title:  Abundance and proportion of adult fish species of the Northeast U.S. Shelf;
bottom trawl surveys were conducted by the Northeast Fisheries Science
Center (NEFSC) during 1977-1987 and 1999-2008
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_560342)
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
 
   Maximum ?
 
 taxa (text) ?          "Amblyraja_radiata"    "Zoarces_americanus"
 year (dimensionless) ?          1977    2008
 season (dimensionless) ?          1    2
 strata (dimensionless) ?          1    47
 latitude (degrees_north) ?          35.87810748    44.26110273
  < slider >
 longitude (degrees_east) ?          -75.69231598    -65.91371179
  < slider >
 area (square kilomters (km^2)) ?          923.79    15368.0
 mean_abund (mean number of adults) ?          0.0    2.244219316E7
 rel_proportion (percentage (%)) ?          0.0    100.0
 
Server-side Functions ?
 distinct() ?
? ("Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.")

File type: (more info)

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  taxa {
    String bcodmo_name "taxon";
    String description "Species/taxonomic name.";
    String long_name "Taxa";
    String units "text";
  }
  year {
    Int16 _FillValue 32767;
    Int16 actual_range 1977, 2008;
    String bcodmo_name "year";
    String description "4 digit GMT year";
    String long_name "Year";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/";
    String units "dimensionless";
  }
  season {
    Byte _FillValue 127;
    Byte actual_range 1, 2;
    String bcodmo_name "season";
    String description "1 digit code for sample season: 1=spring and 2=fall.";
    String long_name "Season";
    String units "dimensionless";
  }
  strata {
    Byte _FillValue 127;
    Byte actual_range 1, 47;
    String bcodmo_name "unknown";
    String description "2 digit code for EcoMon plankton strata. See a map of the EcoMon plankton strata (PDF).";
    String long_name "Strata";
    String units "dimensionless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 35.87810748, 44.26110273;
    String axis "Y";
    String bcodmo_name "latitude";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String description "Strata latitude center in decimal degrees";
    String ioos_category "Location";
    String long_name "Latitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LATX/";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -75.69231598, -65.91371179;
    String axis "X";
    String bcodmo_name "longitude";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String description "Strata longitude center in decimal degrees";
    String ioos_category "Location";
    String long_name "Longitude";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P09/current/LONX/";
    String standard_name "longitude";
    String units "degrees_east";
  }
  area {
    Float32 _FillValue NaN;
    Float32 actual_range 923.79, 15368.0;
    String bcodmo_name "unknown";
    String description "Strata area in square kilometers";
    String long_name "Area";
    String units "square kilomters (km^2)";
  }
  mean_abund {
    Float64 _FillValue NaN;
    Float64 actual_range 0.0, 2.244219316e+7;
    String bcodmo_name "abundance";
    String description "Strata mean abundance (mean number of adults)";
    String long_name "Mean Abund";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P03/current/B070/";
    String units "mean number of adults";
  }
  rel_proportion {
    Float64 _FillValue NaN;
    Float64 actual_range 0.0, 100.0;
    String bcodmo_name "relative_abund";
    String description "Strata relative proportion (% collected in a stratum for that season and year)";
    String long_name "Rel Proportion";
    String units "percentage (%)";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson";
    String acquisition_description 
"The Northeast Fisheries Science Center (NEFSC) has conducted bottom trawl
surveys for juvenile and adult fish on the NEUS Shelf over the past four
decades (Azarovitz 1981). The surveys were conducted in the spring (March-
April) and fall (September-October) using a stratified random design. All fish
for each species were counted and weighed. Literature values of the estimated
median size at maturity (50th percentile) were used for most species to
determine size at maturity and only mature adults were included the catch
estimates.
 
References:  
 Azarovitz TR. 1981. A brief historical review of the Woods Hole Laboratory
trawl survey time series. Canadian Special Publication of Fisheries and
Aquatic Sciences. 58:62-7.";
    String cdm_data_type "Other";
    String comment 
"Northeast U.S. Adult Fish 
  From The Northeast Fisheries Science Center (NEFSC) Bottom Trawl Surveys 
 PI: Dr. Jon Hare (NOAA-NEFSC) 
 Contact: Harvey Walsh (NOAA-NEFSC) 
 Version: 11 June 2015";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_type "institution";
    String creator_url "https://www.bco-dmo.org/";
    String data_source "extract_data_as_tsv version 2.3  19 Dec 2019";
    String date_created "2015-06-11T18:01:01Z";
    String date_modified "2020-01-14T21:15:10Z";
    String defaultDataQuery "&amp;time&lt;now";
    String doi "10.1575/1912/bco-dmo.560342.1";
    Float64 Easternmost_Easting -65.91371179;
    Float64 geospatial_lat_max 44.26110273;
    Float64 geospatial_lat_min 35.87810748;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -65.91371179;
    Float64 geospatial_lon_min -75.69231598;
    String geospatial_lon_units "degrees_east";
    String history 
"2020-07-10T03:41:42Z (local files)
2020-07-10T03:41:42Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_560342.html";
    String infoUrl "https://www.bco-dmo.org/dataset/560342";
    String institution "BCO-DMO";
    String instruments_0_acronym "Otter Trawl";
    String instruments_0_dataset_instrument_description 
"For specific details on the adult fish collection gear, see:
Azarovitz TR. 1981. A brief historical review of the Woods Hole Laboratory trawl survey time series. Canadian Special Publication of Fisheries and Aquatic Sciences. 58:62-7. (PDF)";
    String instruments_0_dataset_instrument_nid "560560";
    String instruments_0_description "Otter trawls have large rectangular otter boards  which are used to keep the mouth of the trawl net open. Otter boards  are made of timber or steel and are positioned in such a way that the  hydrodynamic forces, acting on them when the net is towed along the  seabed, pushes them outwards and prevents the mouth of the net from  closing. The speed  that the trawl is towed at depends on the swimming speed of the species  which is being targeted and the exact gear that is being used, but for  most demersal species, a speed of around 4 knots (7 km/h) is appropriate. More: https://en.wikipedia.org/wiki/Bottom_trawling";
    String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/61/";
    String instruments_0_instrument_name "Otter Trawl";
    String instruments_0_instrument_nid "621";
    String keywords "abund, area, bco, bco-dmo, biological, chemical, data, dataset, dmo, erddap, latitude, longitude, management, mean, mean_abund, oceanography, office, preliminary, proportion, rel, rel_proportion, season, strata, taxa, year";
    String license "https://www.bco-dmo.org/dataset/560342/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/560342";
    Float64 Northernmost_Northing 44.26110273;
    String param_mapping "{'560342': {'lat': 'flag - latitude', 'lon': 'flag - longitude'}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/560342/parameters";
    String people_0_affiliation "Northeast Fisheries Science Center - Narragansett";
    String people_0_affiliation_acronym "NOAA NEFSC";
    String people_0_person_name "Jonathan Hare";
    String people_0_person_nid "51164";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "Northeast Fisheries Science Center - Narragansett";
    String people_1_affiliation_acronym "NOAA NEFSC";
    String people_1_person_name "Harvey Walsh";
    String people_1_person_nid "560345";
    String people_1_role "Contact";
    String people_1_role_type "related";
    String people_2_affiliation "Woods Hole Oceanographic Institution";
    String people_2_affiliation_acronym "WHOI BCO-DMO";
    String people_2_person_name "Shannon Rauch";
    String people_2_person_nid "51498";
    String people_2_role "BCO-DMO Data Manager";
    String people_2_role_type "related";
    String project "NEFSCBottomTrawl";
    String projects_0_acronym "NEFSCBottomTrawl";
    String projects_0_description 
"The Northeast Fisheries Science Center (NEFSC) has conducted bottom trawl surveys for juvenile and adult fish on the NEUS Shelf over the past four decades (Azarovitz 1981). The surveys were conducted in the spring (March-April) and fall (September-October) using a stratified random design. All fish for each species were counted and weighed. Literature values of the estimated median size at maturity (50th percentile) were used for most species to determine size at maturity and only mature adults were included the catch estimates.
References:
Azarovitz TR. 1981. A brief historical review of the Woods Hole Laboratory trawl survey time series. Canadian Special Publication of Fisheries and Aquatic Sciences. 58:62-7. (PDF)";
    String projects_0_end_date "2008-12";
    String projects_0_geolocation "Northeast U.S. Shelf Ecosystem from Cape Hatteras, North Carolina to Cape Sable, Nova Scotia";
    String projects_0_name "Northeast Fisheries Science Center Bottom Trawl Survey";
    String projects_0_project_nid "560408";
    String projects_0_start_date "1977-01";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 35.87810748;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Abundance and proportion of adult fish species of the Northeast U.S. Shelf; bottom trawl surveys were conducted by the Northeast Fisheries Science Center (NEFSC) during 1977-1987 and 1999-2008.";
    String title "Abundance and proportion of adult fish species of the Northeast U.S. Shelf; bottom trawl surveys were conducted by the Northeast Fisheries Science Center (NEFSC) during 1977-1987 and 1999-2008";
    String version "1";
    Float64 Westernmost_Easting -75.69231598;
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its selection constraints (external link).

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.


 
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