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
- 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
))
- Reference system identifier
- http://www.epsg-registry.org / EPSG:4326
- Distribution format
-
-
CSV
(
n/a
)
-
CSV
(
n/a
)
- 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
Overviews

Spatial extent
))
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