• Arctic SDI catalogue
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Mobile gear sentinel fisheries program - northern Gulf of St. Lawrence

In place since fall 1994, the sentinel fisheries program is the result of a collaboration between Fisheries and Oceans Canada (DFO) and Quebec and Newfoundland commercial fishermen's associations. Under this program, contracts are awarded by tender to fishermen’s associations to carry out fishing activities according to scientific protocols developed by DFO. The main objective of this survey is to collect data that will be used to calculate abundance indices for various fish stocks, including cod, Greenland halibut, Atlantic halibut and rockfish.

Description of mobile survey

The mobile gear sentinel fisheries of the northern Gulf of St. Lawrence are conducted in the sub-division 3Pn and the divisions 4R, 4S and the northern part of the division 4T of the Northwest Atlantic Fisheries Organization (NAFO). This program follows a stratified random survey plan according to depth strata, NAFO divisions and the type of substrate at the bottom. A standard tow is 30 minutes long and made at a speed of 2.5 knots. The fishing gear is a 300 Star Balloon trawl mounted on a Rock Hopper footgear. The trawl mesh size is 145 mm with a liner of 40 mm in the codend. Unless conditions at sea compromise safety during fishing activity, a retaining cable must be used to standardize the horizontal opening between vessels and the various depths fished. Data are collected by observers at sea or by technicians.

The data contained in this program are divided into 4 different projects.

-The summer series, carried out during the month of July

-The fall series, which covers the period from 1995 to 2002

-The winter series, to study the mixing between the different stocks

-The CRP (Cod reproductive potential) series, which targets the reproductive potential.

Data

For each trait, the total catch is sorted and weighed for each species. The number of individuals caught for each unmeasured fish species is noted. Biological data such as length, weight (sampled, per individual, gonad, liver and stomach), age, sex and maturity migth then be collected on a subsample of many species such as Atlantic halibut, Greenland halibut, lumpfish and Atlantic cod, using a variety of protocols.

The biological data are divided into 4 files: a “Metadata” file containing set information, a “Catches” file containing catches per set for fish taxa, a “Carbio” file containing biological and morphometric measurements per individual, a “Freql” file containing the length frequency of fish.

The data collected as part of this program is available below. It is important to note, however, that 1) only traits deemed successful have been retained; 2) historical data may contain inaccuracies; 3) the most recent survey is not available for validation purposes.

Simple

Date ( RI_367 )
2019
Date ( RI_366 )
2019
Date ( RI_368 )
2025
RI_416
  Government of Canada; Fisheries and Oceans Canada - Section Gestion de données - Direction des avis, information et soutien scientifiques ( )
850, route de la Mer, P.O. Box 1000 , Mont-Joli , Quebec , G5H 3Z4 , Canada
Status
onGoing; enContinue RI_596
Maintenance and update frequency
asNeeded; auBesoin RI_540
Keywords ( RI_525 )
  • Gulf of St. Lawrence
Keywords ( RI_530 )
  • Sentinel fisheries
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Marine biology
  • Aquatic wildlife
  • Aquatic ecosystems
  • Oceans
  • Fish
  • Fisheries management
Classification
unclassified; nonClassifié RI_484
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
Spatial representation type
vector; vecteur RI_635
Metadata language
eng
Metadata language
fra
Character set
utf8; utf8 RI_458
Topic category
  • Biota
Begin date
1994
N
S
E
W
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Reference system identifier
https://epsg.io/ / EPSG:4326 /
Distribution format
  • CSV ( unknown )

RI_414
  Government of Canada; Fisheries and Oceans Canada - Section Gestion de données - Direction des avis, information et soutien scientifiques ( )
850, route de la Mer, P.O. Box 1000 , Mont-Joli , Quebec , G5H 3Z4 , Canada
OnLine resource
Data dictionary ( HTTPS )

Supporting Document;CSV;eng,fra

OnLine resource
Mobile Gear Map Data ( ESRI REST: Map Service )

Web Service;ESRI REST;fra

OnLine resource
Mobile Gear Map data ( ESRI REST: Map Service )

Web Service;ESRI REST;eng

OnLine resource
Mobile gear sentinel automnal fisheries data ( HTTPS )

Dataset;ZIP;eng

OnLine resource
Mobile gear sentinel automnal fisheries data ( HTTPS )

Dataset;ZIP;fra

OnLine resource
Mobile gear sentinel CRP fisheries data ( HTTPS )

Dataset;ZIP;eng

OnLine resource
Mobile gear sentinel CRP fisheries data ( HTTPS )

Dataset;ZIP;fra

OnLine resource
Mobile gear sentinel hivernal fisheries data ( HTTPS )

Dataset;ZIP;eng

OnLine resource
Mobile gear sentinel hivernal fisheries data ( HTTPS )

Dataset;ZIP;fra

OnLine resource
Mobile gear sentinel estival fisheries data ( HTTPS )

Dataset;ZIP;eng

OnLine resource
Mobile gear sentinel estival fisheries data ( HTTPS )

Dataset;ZIP;fra

OnLine resource
Sentinel Fisheries - Reports ( HTTP )

Supporting Document;PDF;eng,fra

File identifier
929fe07f-ab8e-4b3c-8ee3-1aa7a9ea0b1a XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Hierarchy level
dataset; jeuDonnées RI_622
Date stamp
2025-05-28T14:03:36.925Z
Metadata standard name
North American Profile of ISO 19115:2003 - Geographic information - Metadata
Metadata standard version
CAN/CGSB-171.100-2009
RI_418
  Government of Canada; Fisheries and Oceans Canada - Section Gestion de données - Direction des avis, information et soutien scientifiques ( )
850, route de la Mer, P.O. Box 1000 , Mont-Joli , Quebec , G5H 3Z4 , Canada
 
 

Overviews

overview
Vignette_PS_mobile_s.png

Spatial extent

N
S
E
W
thumbnail


Keywords


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Associated resources

Not available


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