ERDDAP > info > bcodmo_dataset_2797

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	Maine/New Hampshire Inshore Trawl Survey: Catch Data 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)		I   M	background			BCO-DMO	bcodmo_dataset_2797

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	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.
attribute	NC_GLOBAL	awards_0_award_nid	String	55021
attribute	NC_GLOBAL	awards_0_award_number	String	unknown NEC-CoopRes NEC
attribute	NC_GLOBAL	awards_0_funder_name	String	NorthEast Consortium
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NEC
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	383
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Inshore Trawl Catch data P.I. John Sowles
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/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	date_created	String	2009-02-12T22:41:17Z
attribute	NC_GLOBAL	date_modified	String	2019-02-18T21:41:04Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.2797.1
attribute	NC_GLOBAL	Easternmost_Easting	double	-66.9519
attribute	NC_GLOBAL	geospatial_lat_max	double	44.7117
attribute	NC_GLOBAL	geospatial_lat_min	double	42.863
attribute	NC_GLOBAL	geospatial_lat_units	String	degrees_north
attribute	NC_GLOBAL	geospatial_lon_max	double	-66.9519
attribute	NC_GLOBAL	geospatial_lon_min	double	-70.7545
attribute	NC_GLOBAL	geospatial_lon_units	String	degrees_east
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/2797
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	Custom Trawl
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	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.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	5480
attribute	NC_GLOBAL	instruments_0_description	String	A net towed through the water column designed to sample free-swimming nekton or fish, varies in design depending on the research project.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/23/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Trawl_custom
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	634
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Trawl_custom
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, caught, chemical, common, common_name, data, dataset, depth, depth_fm, depth_strata, dmo, erddap, fishid, grid, latitude, longitude, management, name, num, num_caught, oceanography, office, preliminary, region, season, taxa, total, towid, weight, weight_kg_total, year
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/2797/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/2797
attribute	NC_GLOBAL	Northernmost_Northing	double	44.7117
attribute	NC_GLOBAL	param_mapping	String	{'2797': {'lat': 'master - latitude', 'lon': 'master - longitude', 'depth_fm': 'flag - depth'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/2797/parameters
attribute	NC_GLOBAL	people_0_person_name	String	John Sowles
attribute	NC_GLOBAL	people_0_person_nid	String	50906
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	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_1_person_name	String	Nancy Copley
attribute	NC_GLOBAL	people_1_person_nid	String	50396
attribute	NC_GLOBAL	people_1_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_1_role_type	String	related
attribute	NC_GLOBAL	project	String	NEC-CoopRes
attribute	NC_GLOBAL	projects_0_acronym	String	NEC-CoopRes
attribute	NC_GLOBAL	projects_0_description	String	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.
attribute	NC_GLOBAL	projects_0_geolocation	String	Georges Bank, Gulf of Maine
attribute	NC_GLOBAL	projects_0_name	String	Northeast Consortium: Cooperative Research
attribute	NC_GLOBAL	projects_0_project_nid	String	2045
attribute	NC_GLOBAL	projects_0_project_website	String	http://northeastconsortium.org/
attribute	NC_GLOBAL	projects_0_start_date	String	1999-01
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	42.863
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Maine/New Hampshire Inshore Trawl Survey: Catch Data 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)
attribute	NC_GLOBAL	title	String	Maine/New Hampshire Inshore Trawl Survey: Catch Data 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)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	Westernmost_Easting	double	-70.7545
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	year		short
attribute	year	_FillValue	short	32767
attribute	year	actual_range	short	2000, 2004
attribute	year	bcodmo_name	String	year
attribute	year	description	String	year, 4 diget year
attribute	year	long_name	String	Year
attribute	year	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/
variable	season		String
attribute	season	bcodmo_name	String	unknown
attribute	season	description	String	season of year, i.e. spring, fall
attribute	season	long_name	String	Season
variable	region		byte
attribute	region	_FillValue	byte	127
attribute	region	actual_range	byte	1, 5
attribute	region	bcodmo_name	String	unknown
attribute	region	description	String	One of five geographic regions. For more detail seeFinal Report starting on page 4. 1 = NH-Southern ME 2 = Casco Bay - Midcoast3 = Penobscot Bay4 = Jerico-Frenchmans Bay5 = Downeast, ME
attribute	region	long_name	String	Region
variable	towid		String
attribute	towid	bcodmo_name	String	unknown
attribute	towid	description	String	Unique identifier for each tow. FL indicates Fall, SP indicates Spring, followed by a two digit year designation and a consecutive tow number
attribute	towid	long_name	String	Towid
variable	latitude		double
attribute	latitude	_CoordinateAxisType	String	Lat
attribute	latitude	_FillValue	double	NaN
attribute	latitude	actual_range	double	42.863, 44.7117
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	latitude; north is positive
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/
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	-70.7545, -66.9519
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	longitude; east is positive
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/
attribute	longitude	standard_name	String	longitude
attribute	longitude	units	String	degrees_east
variable	depth_fm		double
attribute	depth_fm	_FillValue	double	NaN
attribute	depth_fm	actual_range	double	6.5, 86.5
attribute	depth_fm	bcodmo_name	String	unknown
attribute	depth_fm	colorBarMaximum	double	8000.0
attribute	depth_fm	colorBarMinimum	double	-8000.0
attribute	depth_fm	colorBarPalette	String	TopographyDepth
attribute	depth_fm	description	String	water depth at start or end of tow in fathoms
attribute	depth_fm	long_name	String	Depth
attribute	depth_fm	standard_name	String	depth
variable	grid		String
attribute	grid	bcodmo_name	String	unknown
attribute	grid	description	String	grid number, A one square nautical mile grid system was placedover the survey area. For more detail see Final Report page 5
attribute	grid	long_name	String	Grid
variable	depth_strata		byte
attribute	depth_strata	_FillValue	byte	127
attribute	depth_strata	actual_range	byte	1, 4
attribute	depth_strata	bcodmo_name	String	unknown
attribute	depth_strata	colorBarMaximum	double	8000.0
attribute	depth_strata	colorBarMinimum	double	-8000.0
attribute	depth_strata	colorBarPalette	String	TopographyDepth
attribute	depth_strata	description	String	depth strata code (years 2000-2002) where: 1 = 5-20 fathoms, 2 = 21-35 fathoms, 3 = 36-50+ fathoms depth strata code (years 2003-2004) where: 1 = 5-20 fathoms, 2 = 21-35 fathoms, 3 = 36-55 fathoms, 4 = 55-85+ fathoms
attribute	depth_strata	long_name	String	Depth
attribute	depth_strata	standard_name	String	depth
variable	fishid		String
attribute	fishid	bcodmo_name	String	unknown
attribute	fishid	description	String	Numeric code for species."id_code" (from inshore_fishlist object) isincorporated into "fishid" after 2004
attribute	fishid	long_name	String	Fishid
variable	taxa		String
attribute	taxa	bcodmo_name	String	unknown
attribute	taxa	description	String	Scientific name of animal.
attribute	taxa	long_name	String	Taxa
variable	weight_kg_total		float
attribute	weight_kg_total	_FillValue	float	NaN
attribute	weight_kg_total	actual_range	float	0.0, 520.62
attribute	weight_kg_total	bcodmo_name	String	unknown
attribute	weight_kg_total	description	String	Total weight of specified species (per fishid), in kilograms
attribute	weight_kg_total	long_name	String	Weight Kg Total
variable	num_caught		float
attribute	num_caught	_FillValue	float	NaN
attribute	num_caught	actual_range	float	0.0, 47317.0
attribute	num_caught	bcodmo_name	String	num_caught
attribute	num_caught	description	String	Number of specified species (per fishid) caught.
attribute	num_caught	long_name	String	Num Caught
variable	common_name		String
attribute	common_name	bcodmo_name	String	unknown
attribute	common_name	description	String	Common name of animal.
attribute	common_name	long_name	String	Common Name

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.