ERDDAP > info > bcodmo_dataset_3144

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	Cod by-catch reducing gear: video observations of fish behavior from Fishing Vessels NEC- MP2000-2 in the Gulf of Maine from 2000-2002 (NEC-CoopRes project)		I   M	background			BCO-DMO	bcodmo_dataset_3144

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
attribute	NC_GLOBAL	acquisition_description	String	Two trawl nets, the \"Ribas net\" and a Faroe Island design prototype, were constructed and tested at sea on a commercial vessel, against a conventional two-seam groundfish net, which served as a control. The two experimental nets both modify the top half of a trawl net; the Ribas by using large square mesh and the Faroese by removing much of the twine at the top of the net. The project goal was to reduce cod as bycatch up to 75-90% (and perhaps dogfish (Squalus acanthias) bycatch as well). This net was designed to target the following species: yellow tail flounder (Pleuronectes ferruginea), winter flounder (Pleuronectes americanus), American plaice (Hippoglossoides platessoides), windowpane flounder (Glyptocephalus cynoglossus), and skate (Rajidea). Seventy pairs of alternate tows with the control net resulted in reductions of cod bycatch of >76% for both nets. Catch rates of sublegal yellowtail flounder were also >74% lower for both nets compared to the control. There were, however, reductions in the legal catch of yellowtail and winter flounders. Underwater video showed cod exiting the nets through the top mesh or gap made by removal of the twine. The results of this project have been presented to the New England Fishery Management Council Multispecies Plan Development Team, which encouraged participants to demonstrate the performance of the Ribas net in off-shore areas. The participants have continued the research with Saltonstall-Kennedy funding. However, modified versions of both nets were included as options in Amendment 13 to the Groundfish Fishery Management Plan. (from [final report](\\"http://northeastconsortium.org/ProjectFileDownload.pm?report_id=92&table=project_report\\"))
attribute	NC_GLOBAL	awards_0_award_nid	String	55048
attribute	NC_GLOBAL	awards_0_award_number	String	unknown NEC-CoopRes NOAA
attribute	NC_GLOBAL	awards_0_funder_name	String	National Oceanic and Atmospheric Administration
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NOAA
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	352
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Cod by-catch reducing gear: fish escape behavior PI: M. Pol (Mass. Div. Mar. Fisheries) dates: Dec. 2000 - May 2002
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	2010-06-16T20:40:40Z
attribute	NC_GLOBAL	date_modified	String	2020-01-22T17:55:15Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.3144.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/3144
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	Beam trawl
attribute	NC_GLOBAL	instruments_0_dataset_instrument_description	String	two experimental trawl nets, Ribas net and topless net.
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	4885
attribute	NC_GLOBAL	instruments_0_description	String	A beam trawl consists of a cone-shaped body ending in a bag or codend, which retains the catch. In these trawls the horizontal opening of the net is provided by a beam, made of wood or metal, which is up to 12 m long. The vertical opening is provided by two hoop-like trawl shoes mostly made from steel. No hydrodynamic forces are needed to keep a beam trawl open. The beam trawl is normally towed on outriggers, one trawl on each side. While fishing for flatfish the beam trawl is often equipped with tickler chains to disturb the fish from the seabed. For operations on very rough fishing grounds they can be equipped with chain matrices. Chain matrices are rigged between the beam and the groundrope and prevent boulders/stones from being caught by the trawl. Shrimp beam trawls are not so heavy and have smaller mesh sizes. A bobbin of groundrope with rubber bobbins keeps the shrimp beam trawl in contact with the bottom and gives flatfish the opportunity to escape. Close bottom contact is necessary for successful operation. To avoid bycatch of most juvenile fishes selectivity devices are assembled (sieve nets, sorting grids, escape holes). While targeting flatfish the beam trawls are towed up to seven knots, therefore the gear is very heavy; the largest gears weighs up to 10 ton. The towing speed for shrimp is between 2.5 and 3 knots. (from: http://www.fao.org/fishery/geartype/305/en)
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/24/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	Beam Trawl
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	521
attribute	NC_GLOBAL	instruments_0_supplied_name	String	Trawl
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, behavior, biological, chemical, data, dataset, date, day, day_local, dmo, elapsed, erddap, interaction, local, management, month, month_local, net, net_type, number, oceanography, office, preliminary, rope, rope_interaction, species, time, time_elapsed, type, year, yrday, yrday_local
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/3144/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/3144
attribute	NC_GLOBAL	param_mapping	String	{'3144': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/3144/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Massachusetts Division of Marine Fisheries
attribute	NC_GLOBAL	people_0_person_name	String	Michael Pol
attribute	NC_GLOBAL	people_0_person_nid	String	50903
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	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Cod by-catch reducing gear: video observations of fish behavior from Fishing Vessels NEC-MP2000-2 in the Gulf of Maine from 2000-2002 (NEC-CoopRes project).
attribute	NC_GLOBAL	title	String	Cod by-catch reducing gear: video observations of fish behavior from Fishing Vessels NEC-MP2000-2 in the Gulf of Maine from 2000-2002 (NEC-CoopRes project)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	species		String
attribute	species	bcodmo_name	String	species
attribute	species	description	String	common name of fish
attribute	species	long_name	String	Species
variable	rope_interaction		String
attribute	rope_interaction	bcodmo_name	String	unknown
attribute	rope_interaction	description	String	which rope, head or foot, the fish interacted with in the video
attribute	rope_interaction	long_name	String	Rope Interaction
variable	net_type		String
attribute	net_type	bcodmo_name	String	unknown
attribute	net_type	description	String	type of experimental net: Ribas or topless trawl net
attribute	net_type	long_name	String	Net Type
variable	behavior		String
attribute	behavior	bcodmo_name	String	unknown
attribute	behavior	description	String	observed net escape behavior
attribute	behavior	long_name	String	Behavior
attribute	behavior	units	String	unitless
variable	number		byte
attribute	number	_FillValue	byte	127
attribute	number	actual_range	byte	0, 119
attribute	number	bcodmo_name	String	count
attribute	number	colorBarMaximum	double	100.0
attribute	number	colorBarMinimum	double	0.0
attribute	number	description	String	number of fish exhibiting observed behavior
attribute	number	long_name	String	Number
attribute	number	units	String	fish
variable	time_elapsed		byte
attribute	time_elapsed	_FillValue	byte	127
attribute	time_elapsed	actual_range	byte	28, 60
attribute	time_elapsed	bcodmo_name	String	unknown
attribute	time_elapsed	description	String	duration of video
attribute	time_elapsed	long_name	String	Time Elapsed
attribute	time_elapsed	units	String	minutes
variable	date_local		String
attribute	date_local	bcodmo_name	String	date_local
attribute	date_local	description	String	local date
attribute	date_local	long_name	String	Date Local
attribute	date_local	source_name	String	date_local
attribute	date_local	time_precision	String	1970-01-01
attribute	date_local	units	String	unitless
variable	day_local		String
attribute	day_local	bcodmo_name	String	unknown
attribute	day_local	description	String	local day of month; 1-31
attribute	day_local	long_name	String	Day Local
attribute	day_local	units	String	unitless
variable	month_local		String
attribute	month_local	bcodmo_name	String	month_local
attribute	month_local	description	String	local month of year: 1-12
attribute	month_local	long_name	String	Month Local
attribute	month_local	units	String	unitless
variable	year		short
attribute	year	_FillValue	short	32767
attribute	year	actual_range	short	2000, 2001
attribute	year	bcodmo_name	String	year
attribute	year	description	String	year
attribute	year	long_name	String	Year
attribute	year	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/YEARXXXX/
attribute	year	units	String	unitless
variable	yrday_local		short
attribute	yrday_local	_FillValue	short	32767
attribute	yrday_local	actual_range	short	5, 339
attribute	yrday_local	bcodmo_name	String	yrday_local
attribute	yrday_local	description	String	local day and decimal time. eg. 326.5 for the 326th day of the year or November 22 at 1200 hours (noon)
attribute	yrday_local	long_name	String	Yrday Local
attribute	yrday_local	units	String	unitless

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.