• Arctic SDI catalogue
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Northumberland Strait Multi-species Trawl Survey Data

PURPOSE:

The primary objective of this survey is to obtain an index of the abundance of American lobster (Homarus Americanus) in the Northumberland Strait. This research survey also provides fisheries-independent information for all of the species captured by the trawl.

DESCRIPTION:

Catch weight, length frequencies, and biological information for crustaceans and fish caught during the annual July-August research vessel trawl survey in Northumberland Strait (NAFO Division 4T). Abundance indices and spatial distribution patterns of commercial and non-commercial crustaceans and other groundfish.

PARAMETERS COLLECTED:

The full catch is sorted to species, or lowest taxonomic group possible, and weighed. For lobster, carapace length, sex and carapace condition (i.e. stage of moult) are recorded. For female lobster, the presence or absence of eggs is noted and, starting in 2010, the stage of development of the eggs (i.e. new or old) when present was also recorded. Similarly, for crabs, the carapace width, sex and carapace condition (i.e. stage of moult) is recorded as is the presence or absence of eggs (for females). Fish sampling varied over the years but, starting in 2005, length has been recorded for all fish captured.

For large catches, the complete catch is sorted and weighed, but sub-sampling, by species, is used for the other measurements.

NOTES ON QUALITY CONTROL:

Data are checked for irregularities.

SAMPLING METHODS:

The Northumberland Strait multi-species survey began in 2001 as a random stratified survey and now employs a random selection of sampling sites within the study area. Sampling is completed annually over a 4-week period in July and August. 110 stations are sampled in Northumberland Strait in water depths exceeding 4 m at Lowest Normal Tide. The survey has employed a 286 rockhopper trawl in all years from 2001 to 2018, except in 2010 and 2011 when a Nephrops trawl was used. In 2019, a newly designed trawl (termed the “Northumberland trawl”) was used in addition to the rockhopper trawl. The Northumberland trawl is similar to the rockhopper trawl but with a smaller footgear and smaller mesh sizes.

At each station, the trawl is towed for a set period of time (recently 15 minutes with the rockhopper trawl and 10 minutes with the Northumberland trawl).

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 )
2000-07-25
Date ( RI_367 )
2020-04-04
RI_409
  Government of Canada; Fisheries and Oceans Canada - Denis Gagnon ( Data Manager )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
RI_409
  Government of Canada; Fisheries and Oceans Canada - Natalie Asselin ( Biologist )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
506-378-0481
RI_415
  Government of Canada; Fisheries and Oceans Canada - Natalie Asselin ( Biologist )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
506-378-0481
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
The primary objective of this survey is to obtain an index of the abundance of American lobster (Homarus Americanus) in the Northumberland Strait. This research survey also provides fisheries-independent information for all of the species captured by the trawl.
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 )
  • Trawl
Integrated Taxonomic Information System (ITIS) Système d'information taxonomique intégré (SITI) ( RI_528 )
  • Alosa pseudoharengus
  • Cancer irroratus
  • Clupea harengus harengus
  • Gadus morhua
  • Hippoglossoides platessoides
  • Homarus americanus
  • Leucoraja ocellata
  • Limanda ferruginea
  • Microgadus tomcod
  • Myoxocephalus octodecemspinosus
  • Myoxocephalus scorpius
  • Osmerus mordax
  • Ovalipes ocellatus
  • Pseudopleuronectes americanus
  • Scomber scombrus
  • Scophthalmus aquosus
  • Tautogolabrus adspersus
  • Urophycis tenuis
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Surveys
  • Fisheries resources
  • Crustaceans
  • Fisheries
  • Oceans
  • Fish
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
textTable; texteTable RI_637
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Topic category
  • Biota
Begin date
2000-07-25
Description
Lobster Fishing Areas (LFA) 25 and 26A
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Reference system identifier
http://www.epsg-registry.org / EPSG:4326
Distribution format
  • CSV ( n/a )

RI_414
  Government of Canada; Fisheries and Oceans Canada - Natalie Asselin ( Biologist )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
506-378-0481
OnLine resource
Northumberland Strait Multi-species Trawl Survey Data ( HTTPS )

Dataset;CSV;eng,fra

OnLine resource
Data dictionary ( HTTPS )

Supporting Document;CSV;eng,fra

OnLine resource
Supplementary citation list ( HTTPS )

Supporting Document;PDF;eng,fra

File identifier
6d61f7b4-39eb-c8a9-a71c-b65d2eca8660 XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Hierarchy level
dataset; jeuDonnées RI_622
Date stamp
2025-03-24T16:53:04.48Z
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 - Natalie Asselin ( Biologist )
343 Université Ave , Moncton , New Brunswick , E1C 5K4 , Canada
506-378-0481
 
 

Overviews

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Spatial extent

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Keywords


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