• Arctic SDI catalogue
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SCUBA Surveys to Assess Lobster Population Structure and Density in the Southern Gulf of St. Lawrence

PURPOSE:

The SCUBA survey was designed to assess the density of small lobsters (1-3 years of age) in rocky reefs, in the nearshore habitat.

DESCRIPTION:

Total number of transects surveyed and total number of lobsters measured for each site in each year. There are some sites that do not have any coordinates identified, therefore these have not been included in the Web Map Services (WMS).

PARAMETERS COLLECTED:

size measurement (biological); species counts (ecological); substrate (geological)

SAMPLING METHODS:

Transects are laid-out from a small vessel using buoys, anchors, and a 100 m leaded rope along the bottom, marked at 5 m intervals. A strip transect survey method is used whereas two divers sample a 1 or 2 m strip (dependent on lobster density) alongside either side of the leaded rope. All captured lobster are measured (carapace length) and all lobsters of ≥20 mm carapace length are sexed. The complexity and suitability of the habitat is assessed in the 5 m sections (e.g. rocky reefs, sand, large boulders).

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 )
2000-06-21
Date ( RI_367 )
2022-05-31
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
Purpose
The SCUBA survey was designed to assess the density of small lobsters (1-3 years of age) in rocky reefs, in the nearshore habitat.
Status
onGoing; enContinue RI_596
Maintenance and update frequency
annually; annuel RI_539
uncontrolled vocabulary; user-specified vocabulaire libre; spécifié par l'utilisateur ( RI_528 )
  • SCUBA (observations and/or sampling)
  • Visual Counts/Observations
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
  • Decapods
Integrated Taxonomic Information System (ITIS) Système d'information taxonomique intégré (SITI) ( RI_528 )
  • Homarus americanus
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Crustaceans
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
None
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
  • Oceans
Begin date
2000-06-21
Description
southern Gulf of St. Lawrence
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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
Summary of SCUBA sites sampled ( 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

OnLine resource
SCUBA surveys web mapping services ( ESRI REST: Map Service )

Web Service;ESRI REST;eng

OnLine resource
SCUBA surveys web mapping services ( ESRI REST: Map Service )

Web Service;ESRI REST;fra

File identifier
45ce9e1a-b495-7ff9-826e-39579d4d16dd XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Hierarchy level
dataset; jeuDonnées RI_622
Date stamp
2025-05-21T17:12:26.884Z
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

overview
lobster

Spatial extent

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Keywords


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Associated resources

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