Accessing BCO-DMO data
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| Dataset Title: | [inshore_trawl stations] - Maine/New Hampshire Inshore Trawl Survey: station information from the F/V Robert Michael,F/V Tara Lynn NEC-JS2000-1 from the the Maine and New Hampshire coasts, 2000-2004 (NEC-CoopRes project) (Northeast Consortium: Cooperative Research) 
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| Institution: | BCO-DMO (Dataset ID: bcodmo_dataset_2796) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
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Attributes {
s {
year {
Int16 _FillValue 32767;
Int16 actual_range 2000, 2004;
String bcodmo_name "year";
String description "year local time";
String long_name "Year";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/";
}
time {
String _CoordinateAxisType "Time";
String axis "T";
String bcodmo_name "date_local";
String description "date, local time, reported month/day/year";
String ioos_category "Time";
String long_name "Date Local";
String source_name "date_local";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String time_precision "1970-01-01";
String units "seconds since 1970-01-01T00:00:00Z";
}
region {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 1, 5;
String bcodmo_name "region";
String description "One of five geographic regions:1 = NH-Southern ME 2 = Casco Bay - Midcoast3 = Penobscot Bay4 = Jerico-Frenchmans Bay5 = Downeast, MEFor more details see: Procedures and Protocols Report";
String long_name "Region";
}
towid {
String bcodmo_name "unknown";
String description "Unique identifier for each tow. FL indicates Fall, SP indicates Spring, followed by a two digit year designation and a consecutive tow number,";
String long_name "Towid";
}
longitude {
String _CoordinateAxisType "Lon";
Float64 _FillValue NaN;
Float64 actual_range -70.7585, -66.9147;
String axis "X";
String bcodmo_name "longitude";
Float64 colorBarMaximum 180.0;
Float64 colorBarMinimum -180.0;
String description "Longitude in decimal degrees. West is negative.";
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";
}
latitude {
String _CoordinateAxisType "Lat";
Float64 _FillValue NaN;
Float64 actual_range 42.8466, 44.78543;
String axis "Y";
String bcodmo_name "latitude";
Float64 colorBarMaximum 90.0;
Float64 colorBarMinimum -90.0;
String description "Latitude in decimal degrees. North is positive.";
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";
}
grid {
String bcodmo_name "unknown";
String description "grid number, tow/station locations were based on a random selection procss using a 1 nautical square mile GIS grid system. (see Procudures and Protocals report)";
String long_name "Grid";
}
se_flag {
String bcodmo_name "se_flag";
String description "tow start and end flags";
String long_name "Se Flag";
}
depth_strata {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 1, 4;
String bcodmo_name "unknown";
Float64 colorBarMaximum 8000.0;
Float64 colorBarMinimum -8000.0;
String colorBarPalette "TopographyDepth";
String description "depth strata code where: 1 = 5-20 fathoms, 2 = 21-35 fathoms, 3 = 36-55 fathoms, 4 = >56 fathoms to approx. the 12-mile limitFrom Fall 2000 to Fall 2002, depth strata 4 was not sampled. The fourth stratawas added in the Spring 2003 survey.";
String long_name "Depth";
String standard_name "depth";
}
time_local {
String bcodmo_name "time_local";
String description "time local, 24 hour clock";
String long_name "Time Local";
String units "hhmm";
}
duration {
Byte _FillValue 127;
String _Unsigned "false";
Byte actual_range 10, 27;
String bcodmo_name "unknown";
String description "length of tow in minutes(All catch data have been adjusted to a standard tow of 20 minutes duration.)";
String long_name "Duration";
String units "minutes";
}
depth_fm {
Float64 _FillValue NaN;
Float64 actual_range 6.2, 99.2;
String bcodmo_name "unknown";
Float64 colorBarMaximum 8000.0;
Float64 colorBarMinimum -8000.0;
String colorBarPalette "TopographyDepth";
String description "water depth at start or end of tow";
String long_name "Depth";
String standard_name "depth";
String units "fathoms";
}
temp {
Float32 _FillValue NaN;
Float32 actual_range 2.68, 40.8;
String bcodmo_name "temperature";
String description "temperature at sea floor";
String long_name "Temperature";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/";
String units "degrees C";
}
sal {
Float32 _FillValue NaN;
Float32 actual_range 5.09, 33.98;
String bcodmo_name "sal";
String description "salinity at sea floor";
String long_name "Sal";
String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PSALST01/";
String units "parts/thousand";
}
yrday_local {
Float32 _FillValue NaN;
Float32 actual_range 113.341, 339.4479;
String bcodmo_name "yrday_local";
String description "local day and decimal time; as 326.5 for the 326th day of the year or November 22 at 1200 hours (noon)";
String long_name "Yrday Local";
String units "unitless";
}
}
NC_GLOBAL {
String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv,.esriCsv,.geoJson,.odvTxt";
String acquisition_description
"Two surveys were conducted; one in the fall beginning October 30, 2000 and a
second in the spring, beginning on April 23, 2001. Each cruise required 25
days over a period of five weeks. . Descriptive data, including geo-
references, trawl duration, depth, salinity and temperature for each survey
are presented. Obviously, a single year of data affords no ability to develop
a time series to be used for more than anything but the most general of
conclusions. Also, since this was the first year, the first few weeks of the
fall survey, especially, was a period in which the crew was testing and
developing skills, procedures, and methods. Nevertheless, data collected from
this first year does reveal some interesting findings. Ninety-nine taxonomic
groups of fish and invertebrates were caught. For this report, we have
selected examples for which we can report results. The complete catch result
summaries are presented by species for each stratum. Fall 2000 Summary Seventy
eight of the 96 planned tows were made. Untowable bottom and presence of fixed
gear prevented us from towing the 18 not towed. The volume of the total mixed
catch varied from a minimum of 4 kg to a maximum of 640 kg per tow. The
average weight of catch was about 122 kg per tow. The total number of species
caught in the fall was 80 with a low of 7 and high of 31 in any particular
tow. Relative coastwide ranking for the top 10 species is reported below in
descending order.
By Number | By Weight
---|---
Herring* | Silver Hake*
Silver Hake* | Lobster
Mixed Shrimp | Herring*
Alewife | Dogfish*
Lobster | Alewife
Rainbow Smelt | Winter Flounder*
Scallop* | Red Hake*
Winter Flounder* | Longhorn Sculpin
Longhorn Sculpin | Monkfish*
Menhaden | White Hake*
* Species managed by the New England Fisheries Management Council
Species managed by the New England Fisheries Management Council Spring 2001
One hundred eleven tows were made in the spring. We were able to achieve this
by anticipating untowable bottom and planning 1 extra randomly selected
alternate tow per stratum for a total of 115 planned tows. Weight of total
mixed catch varied from a minimum of 4.5 kg to a maximum of 5,007 kg per tow,
with an average of 87 kg per tow. Number of species caught per tow ranged from
4 to 31. Total number of species caught during the Spring 2001 survey was 87.
Relative coastwide ranking for the top 10 species is reported below in
descending order.
By Number | By Weight
---|---
Herring* | Herring*
Mixed Shrimp | Lobster
Alewife | Longhorn Sculpin
Silver Hake* | Sea Cucumber
Blue-back herring | Silver Hake*
Longhorn Sculpin | Alewife
Lobster | Winter Flounder*
Scallops* | American Plaice*
Winter Flounder* | Sea Scallop*
American Plaice* | Sea Raven
* Species managed by the New England Fisheries Management Council.
With 61 finfish species and 38 types of invertebrates sampled, a species by
species presentation of results is not practical for this report. However,
following are some examples of the sorts of results that this survey can
produce. Note that we include some examples of non-groundfish species to
demonstrate another attribute of a fisheries independent survey; that the
survey can provide information beneficial for management of the system and not
focus soley on a select suite of target species. Information is gathered on an
ecological community level. Rainbow smelt, for example, may not be directly
exploited commercially but it provides enjoyment to upland recreational
anglers and on an ecological level is a forage species for higher trophic
levels. Sculpins, cartilaginous species, and predator-prey ratios, for
example, have been used as indicators of system-wide health. Landings data do
not include information on these species. Over the long term, system shifts as
a result of climate change may be assessed as exemplified when the Fall Survey
encountered species such as barracudina and scup that historically have not
been common north of Cape Ann, Massachusetts. By looking at population
structure as well as distribution, the importance of shallow inshore habitat
for cod becomes clear. The Fall 2000 portion of Figure 8 shows a year class of
cod that probably hatched in February-April 1999. Most are still in the
shallowest strata. As the fish grow, they move offshore and disperse into
deeper water. In the Spring 2001 portion of Figure 8, one can see young of the
year in the shallow strata. Offshore in the spring, there appears to be more
cod in the deeper strata but certainly not in the numbers that were observed
the previous fall. From a single year\\u2019s tow, it is not possible to know
whether or not the spring survey missed the next year class due to late
inshore migration or whether there simply was a weak year class. Cod, and most
other groundfish species, move into deeper (warmer) water in late fall to
return in the spring as inshore waters warm. Whether the fish were still
farther offshore and had not migrated in at the time of the spring survey, we
cannot determine. The spring of 2001 was cooler than normal. Subsequent
year\\u2019s tows and comparisons with the offshore NMFS data set will help to
resolve this question. As the Maine spring spawning closure for groundfish
'sunsets' at the end of 2002, trawl survey data will be used to evaluate the
need to extend the closure during the next Maine legislative session.";
String awards_0_award_nid "55021";
String awards_0_award_number "unknown NEC-CoopRes NEC";
String awards_0_funder_name "NorthEast Consortium";
String awards_0_funding_acronym "NEC";
String awards_0_funding_source_nid "383";
String cdm_data_type "Other";
String comment "Inshore Trawl station data";
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 "2009-02-12T22:41:17Z";
String date_modified "2019-02-18T21:33:07Z";
String defaultDataQuery "&time<now";
String doi "10.1575/1912/bco-dmo.2796.1";
Float64 Easternmost_Easting -66.9147;
Float64 geospatial_lat_max 44.78543;
Float64 geospatial_lat_min 42.8466;
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -66.9147;
Float64 geospatial_lon_min -70.7585;
String geospatial_lon_units "degrees_east";
String history
"2024-11-10T21:34:16Z (local files)
2024-11-10T21:34:16Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_2796.html";
String infoUrl "https://www.bco-dmo.org/dataset/2796";
String institution "BCO-DMO";
String instruments_0_acronym "Custom Trawl";
String instruments_0_dataset_instrument_description "The net is a scaled down version of the most common shrimp and modified shrimp net design used by Maine’s dragger fleet. The net was designed by the vessel owner and his net designer, Jeff Flagg, to fish effectively, be easily maintained, and be towed by vessels ranging from 45 - 70 ft. with nominal horsepower. Net tapers were cut to permit the shape of the net to get maximum height, while allowing the net to remain tight on the bottom. The net is shackled from the footrope to the frame using two 3/8-inch shackles to a banded wire that runs parallel with the footrope. Heavy rubber wing bobbins retard bottom wing lift. The top leg is 3/8th inch wire, 15 fathoms long, and the bottom leg is 15 fathoms. The net is constructed of 2 inch mesh overall with a 1/2 inch mesh liner in the cod end. Doors are #7.5 Bisons. The 70 ft. footrope includes 70’ of 6 inch cookies. Chain sweeps were not used. Between surveys, the net is sent back to the manufacturer where it is returned to specification.";
String instruments_0_dataset_instrument_nid "5481";
String instruments_0_description "A net towed through the water column designed to sample free-swimming nekton or fish, varies in design depending on the research project.";
String instruments_0_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/23/";
String instruments_0_instrument_name "Trawl_custom";
String instruments_0_instrument_nid "634";
String instruments_0_supplied_name "Trawl_custom";
String keywords "altimetry, bco, bco-dmo, biological, chemical, data, dataset, date, depth, depth_fm, depth_strata, dmo, duration, erddap, flag, grid, laboratory, latitude, local, longitude, management, oceanography, office, preliminary, region, sal, satellite, se_flag, temperature, time, time_local, towid, year, yrday, yrday_local";
String license "https://www.bco-dmo.org/dataset/2796/license";
String metadata_source "https://www.bco-dmo.org/api/dataset/2796";
Float64 Northernmost_Northing 44.78543;
String param_mapping "{'2796': {'lat': 'master - latitude', 'lon': 'master - longitude', 'depth_fm': 'flag - depth', 'date_local': 'flag - time'}}";
String parameter_source "https://www.bco-dmo.org/mapserver/dataset/2796/parameters";
String people_0_person_name "John Sowles";
String people_0_person_nid "50906";
String people_0_role "Principal Investigator";
String people_0_role_type "originator";
String people_1_affiliation "Woods Hole Oceanographic Institution";
String people_1_affiliation_acronym "WHOI BCO-DMO";
String people_1_person_name "Nancy Copley";
String people_1_person_nid "50396";
String people_1_role "BCO-DMO Data Manager";
String people_1_role_type "related";
String project "NEC-CoopRes";
String projects_0_acronym "NEC-CoopRes";
String projects_0_description
"The Northeast Consortium encourages and funds cooperative research and monitoring projects in the Gulf of Maine and Georges Bank that have effective, equal partnerships among fishermen, scientists, educators, and marine resource managers.
The Northeast Consortium seeks to fund projects that will be conducted in a responsible manner. Cooperative research projects are designed to minimize any negative impacts to ecosystems or marine organisms, and be consistent with accepted ethical research practices, including the use of animals and human subjects in research, scrutiny of research protocols by an institutional board of review, etc.";
String projects_0_geolocation "Georges Bank, Gulf of Maine";
String projects_0_name "Northeast Consortium: Cooperative Research";
String projects_0_project_nid "2045";
String projects_0_project_website "http://northeastconsortium.org/";
String projects_0_start_date "1999-01";
String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
String publisher_type "institution";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 42.8466;
String standard_name_vocabulary "CF Standard Name Table v55";
String summary "Maine/New Hampshire Inshore Trawl Survey: station information from the F/V Robert Michael,F/V Tara Lynn NEC-JS2000-1 from the the Maine and New Hampshire coasts, 2000-2004 (NEC-CoopRes project)";
String title "[inshore_trawl stations] - Maine/New Hampshire Inshore Trawl Survey: station information from the F/V Robert Michael,F/V Tara Lynn NEC-JS2000-1 from the the Maine and New Hampshire coasts, 2000-2004 (NEC-CoopRes project) (Northeast Consortium: Cooperative Research)";
String version "1";
Float64 Westernmost_Easting -70.7585;
String xml_source "osprey2erddap.update_xml() v1.3";
}
}
Data Access Protocol (DAP) and its
selection constraints.
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.