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     data   graph     files  public 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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The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson
attribute NC_GLOBAL acquisition_description String 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.
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String 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
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3 19 Dec 2019
attribute NC_GLOBAL date_created String 2015-06-11T18:01:01Z
attribute NC_GLOBAL date_modified String 2020-01-14T21:15:10Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.560342.1
attribute NC_GLOBAL Easternmost_Easting double -65.91371179
attribute NC_GLOBAL geospatial_lat_max double 44.26110273
attribute NC_GLOBAL geospatial_lat_min double 35.87810748
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -65.91371179
attribute NC_GLOBAL geospatial_lon_min double -75.69231598
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/560342 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_acronym String Otter Trawl
attribute NC_GLOBAL instruments_0_dataset_instrument_description String 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)
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 560560
attribute NC_GLOBAL instruments_0_description String 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
attribute NC_GLOBAL instruments_0_instrument_external_identifier String https://vocab.nerc.ac.uk/collection/L05/current/61/ (external link)
attribute NC_GLOBAL instruments_0_instrument_name String Otter Trawl
attribute NC_GLOBAL instruments_0_instrument_nid String 621
attribute NC_GLOBAL keywords String 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
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/560342/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/560342 (external link)
attribute NC_GLOBAL Northernmost_Northing double 44.26110273
attribute NC_GLOBAL param_mapping String {'560342': {'lat': 'flag - latitude', 'lon': 'flag - longitude'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/560342/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String Northeast Fisheries Science Center - Narragansett
attribute NC_GLOBAL people_0_affiliation_acronym String NOAA NEFSC
attribute NC_GLOBAL people_0_person_name String Jonathan Hare
attribute NC_GLOBAL people_0_person_nid String 51164
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String Northeast Fisheries Science Center - Narragansett
attribute NC_GLOBAL people_1_affiliation_acronym String NOAA NEFSC
attribute NC_GLOBAL people_1_person_name String Harvey Walsh
attribute NC_GLOBAL people_1_person_nid String 560345
attribute NC_GLOBAL people_1_role String Contact
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL people_2_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_2_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_2_person_name String Shannon Rauch
attribute NC_GLOBAL people_2_person_nid String 51498
attribute NC_GLOBAL people_2_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_2_role_type String related
attribute NC_GLOBAL project String NEFSCBottomTrawl
attribute NC_GLOBAL projects_0_acronym String NEFSCBottomTrawl
attribute NC_GLOBAL projects_0_description String 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)
attribute NC_GLOBAL projects_0_end_date String 2008-12
attribute NC_GLOBAL projects_0_geolocation String Northeast U.S. Shelf Ecosystem from Cape Hatteras, North Carolina to Cape Sable, Nova Scotia
attribute NC_GLOBAL projects_0_name String Northeast Fisheries Science Center Bottom Trawl Survey
attribute NC_GLOBAL projects_0_project_nid String 560408
attribute NC_GLOBAL projects_0_start_date String 1977-01
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 35.87810748
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String 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.
attribute NC_GLOBAL title String 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
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL Westernmost_Easting double -75.69231598
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable taxa   String  
attribute taxa bcodmo_name String taxon
attribute taxa description String Species/taxonomic name.
attribute taxa long_name String Taxa
attribute taxa units String text
variable year   short  
attribute year _FillValue short 32767
attribute year actual_range short 1977, 2008
attribute year bcodmo_name String year
attribute year description String 4 digit GMT year
attribute year long_name String Year
attribute year nerc_identifier String https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/ (external link)
attribute year units String dimensionless
variable season   byte  
attribute season _FillValue byte 127
attribute season actual_range byte 1, 2
attribute season bcodmo_name String season
attribute season description String 1 digit code for sample season: 1=spring and 2=fall.
attribute season long_name String Season
attribute season units String dimensionless
variable strata   byte  
attribute strata _FillValue byte 127
attribute strata actual_range byte 1, 47
attribute strata bcodmo_name String unknown
attribute strata description String 2 digit code for EcoMon plankton strata. See a map of the EcoMon plankton strata (PDF).
attribute strata long_name String Strata
attribute strata units String dimensionless
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude _FillValue double NaN
attribute latitude actual_range double 35.87810748, 44.26110273
attribute latitude axis String Y
attribute latitude bcodmo_name String latitude
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude description String Strata latitude center in decimal degrees
attribute latitude ioos_category String Location
attribute latitude long_name String Latitude
attribute latitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LATX/ (external link)
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude _FillValue double NaN
attribute longitude actual_range double -75.69231598, -65.91371179
attribute longitude axis String X
attribute longitude bcodmo_name String longitude
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude description String Strata longitude center in decimal degrees
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/LONX/ (external link)
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable area   float  
attribute area _FillValue float NaN
attribute area actual_range float 923.79, 15368.0
attribute area bcodmo_name String unknown
attribute area description String Strata area in square kilometers
attribute area long_name String Area
attribute area units String square kilomters (km^2)
variable mean_abund   double  
attribute mean_abund _FillValue double NaN
attribute mean_abund actual_range double 0.0, 2.244219316E7
attribute mean_abund bcodmo_name String abundance
attribute mean_abund description String Strata mean abundance (mean number of adults)
attribute mean_abund long_name String Mean Abund
attribute mean_abund nerc_identifier String https://vocab.nerc.ac.uk/collection/P03/current/B070/ (external link)
attribute mean_abund units String mean number of adults
variable rel_proportion   double  
attribute rel_proportion _FillValue double NaN
attribute rel_proportion actual_range double 0.0, 100.0
attribute rel_proportion bcodmo_name String relative_abund
attribute rel_proportion description String Strata relative proportion (% collected in a stratum for that season and year)
attribute rel_proportion long_name String Rel Proportion
attribute rel_proportion units String percentage (%)

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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