• Arctic SDI catalogue
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Southern Gulf of St. Lawrence Snow Crab Research Trawl Survey Data

PURPOSE:

Trawl survey data used primarily for assessing the status of snow crab stocks in the southern Gulf of St. Lawrence.

DESCRIPTION:

Tow, catch, and biological information for snow crab and other species caught during the annual snow crab research vessel trawl survey in the southern Gulf of St. Lawrence.

Currently, the survey uses a stratified random design that divides the area into 355 square grids, each measuring 12.7 km by 12.7 km. The survey area spans the majority of snow crab habitat in the southern Gulf, at depths ranging from 20 to 200 fathoms. Sampling stations are trawled during civil twilight hours using a Bigouden Nephrops bottom trawl net. The vessel operates at a target speed of 2 knots for a duration of 5 minutes, maintaining a warp-to-depth ratio of 3:1, with a maximum warp length of 575 fathoms.

PARAMETERS COLLECTED:

Snow crab: sex, carapace width, height of male crab claw, shell condition, gonad colour, egg colour, eggs remaining, and missing legs.

Other species: counts, and weights

Other: GPS coordinates; swept area; depth; temperature; CTD profile;

NOTES ON QUALITY CONTROL:

Data are checked for irregularities and errors.

SAMPLING METHODS:

Survey catches are sorted by species or taxonomic groups and measured directly on board. All snow crab are measured, while select fish species are measured only for a subset of survey stations.

USE LIMITATION:

To ensure scientific integrity and appropriate use of the data, we would encourage you to contact the data custodian.

Simple

Date ( RI_366 )
1988
Date ( RI_367 )
2020-04-06
Date ( RI_368 )
2025-02-06
RI_415
  Government of Canada; Fisheries and Oceans Canada - Mikio Moriyasu ( Fisheries Biologist )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
506-851-6135
RI_409
  Government of Canada; Fisheries and Oceans Canada - Tobie Surette ( Aquatic Science Biologist )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
506-851-9406
RI_409
  Government of Canada; Fisheries and Oceans Canada - Denis Gagnon ( Data Manager )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
RI_412
  Government of Canada; Fisheries and Oceans Canada - CADI / CADI ( Center for Advice, Data and Integration (Gulf) )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
Purpose
Trawl survey data used primarily for assessing the status of snow crab stocks in the southern Gulf of St. Lawrence.
Status
onGoing; enContinue RI_596
Maintenance and update frequency
annually; annuel RI_539
NASA/Global Change Master Directory (GCMD) Science Keywords Version 6.0.0.0.0 NASA/Global Change Master Directory (GCMD) Science Keywords Version 6.0.0.0.0 ( RI_528 )
  • Crustaceans
  • Population Dynamics
  • Fisheries
  • Trawl
Integrated Taxonomic Information System (ITIS) Système d'information taxonomique intégré (SITI) ( RI_528 )
  • Chionoecetes opilio
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Crustaceans
  • Fisheries
DFO Areas Zones du MPO ( RI_525 )
  • Gulf of St. Lawrence
Use limitation
Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)
Access constraints
license; licence RI_606
Use constraints
license; licence RI_606
Use limitation
To ensure scientific integrity and appropriate use of the data, we would encourage you to contact the data custodian.
Use limitation
No limitations
Classification
unclassified; nonClassifié RI_484
Spatial representation type
vector; vecteur RI_635
Metadata language
eng; CAN
Character set
usAscii; usAscii RI_478
Topic category
  • Biota
Begin date
1988
Description
NAFO fishing division 4T
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S
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W
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Reference system identifier
http://www.epsg-registry.org / EPSG:4269
Distribution format
  • CSV ( n/a )

RI_414
  Government of Canada; Fisheries and Oceans Canada - Fabiola Akaishi ( Crustaceans Section Head )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
506-874-3321
OnLine resource
Southern Gulf of St. Lawrence Snow Crab Trawl Survey Dataset – Crab Biological Data ( HTTPS )

Dataset;CSV;eng,fra

OnLine resource
Southern Gulf of St. Lawrence Snow Crab Trawl Survey Dataset – Other Species Biological Data ( HTTPS )

Dataset;CSV;eng,fra

OnLine resource
Southern Gulf of St. Lawrence Snow Crab Trawl Survey Dataset – Sampling Events ( HTTPS )

Dataset;CSV;eng,fra

OnLine resource
Data Dictionary Crab Biological Data ( HTTPS )

Supporting Document;CSV;eng,fra

OnLine resource
Data Dictionary Other Species Biological Data ( HTTPS )

Supporting Document;CSV;eng,fra

OnLine resource
Data Dictionary Sampling Events ( HTTPS )

Supporting Document;CSV;eng,fra

OnLine resource
Supplementary citation list ( HTTPS )

Supporting Document;PDF;eng,fra

File identifier
d73d12ed-cf4a-9f61-d249-58e8eb6b9711 XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Hierarchy level
dataset; jeuDonnées RI_622
Date stamp
2025-02-06T16:38:24.037Z
Metadata standard name
North American Profile of ISO 19115:2003 - Geographic information - Metadata
Metadata standard version
CAN/CGSB-171.100-2009
RI_414
  Government of Canada; Fisheries and Oceans Canada - Fabiola Akaishi ( Crustaceans Section Head )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
506-874-3321
 
 

Overviews

overview
drawing of a snow crab

Spatial extent

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Keywords


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Associated resources

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