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Title Sum-
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)
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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
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

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
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/ (external link)
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 (external link)
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/ (external link)
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 (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/3144 (external link)
attribute NC_GLOBAL param_mapping String {'3144': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/3144/parameters (external link)
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/ (external link)
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/ (external link)
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.

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