• Arctic SDI catalogue
  •  
  •  
  •  

Sea Pen Fields in the Gulf (Western IIA Trawl Sample)

Polygons denoting concentrations of sea pens, small and large gorgonian corals and sponges on the east coast of Canada have been identified through spatial analysis of research vessel survey by-catch data following an approach used by the Northwest Atlantic Fisheries Organization (NAFO) in the Regulatory Area (NRA) on Flemish Cap and southeast Grand Banks. Kernel density analysis was used to identify high concentrations and the area occupied by successive catch weight thresholds was used to identify aggregations. These analyses were performed for each of the five biogeographic zones of eastern Canada. The largest sea pen fields were found in the Laurentian Channel as it cuts through the Gulf of St. Lawrence, while large gorgonian coral forests were found in the Eastern Arctic and on the northern Labrador continental slope. Large ball-shaped Geodia spp. sponges were located along the continental slopes north of the Grand Banks, while on the Scotian Shelf a unique population of the large barrel-shaped sponge Vazella pourtalesi was identified. The latitude and longitude marking the positions of all tows which form these and other dense aggregations are provided along with the positions of all tows which captured black coral, a non-aggregating taxon which is long-lived and vulnerable to fishing pressures.

These polygons identify sea pen fields from the broader distribution of sea pens in the Southern Gulf region as sampled by Western II A trawl gear in the Gulf biogeographic zone. A 15 kg minimum threshold for the sea pen catch was identified as the weight that separated the sea pen field habitat from the broader distribution of sea pens with these research vessel tow data and gear type.

Simple

Date ( RI_367 )
2016-10-13
Date ( RI_366 )
2010-09-01
RI_415
  Government of Canada; Fisheries and Oceans Canada - Ellen Kenchington ( Research Scientist )
Bedford Institute of Oceanography, 1 Challenger Drive, PO Box 1006 , Dartmouth , Nova Scotia , B2Y 4A2 , Canada
RI_408
  Government of Canada; Fisheries and Oceans Canada - Camille Lirette ( GIS Technician )
Bedford Institute of Oceanography, 1 Challenger Drive, PO Box 1006 , Dartmouth , Nova Scotia , B2Y 4A2 , Canada
Status
completed; complété RI_593
Maintenance and update frequency
asNeeded; auBesoin RI_540
Keywords ( RI_528 )
  • Western II A
  • Gulf Biogeographic Zone
  • Gulf of St. Lawrence
  • Southern Gulf
  • Sea Pen Field
  • Sea Pen
  • Pennatulacea
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Marine biology
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; CAN; fra; CAN
Topic category
  • Biota
Begin date
2010-09-01
N
S
E
W
thumbnail


Reference system identifier
EPSG / EPSG:4326 / 8.2.6
Distribution format
  • ESRI REST ( 10.3.1 )

RI_408
  Government of Canada; Fisheries and Oceans Canada - Camille Lirette ( GIS Technician )
OnLine resource
Sea Pen Fields in the Gulf - Western IIA Trawl Sample ( ESRI REST: Map Service )

Web Service;ESRI REST;eng

OnLine resource
Sea Pen Fields in the Gulf - Western IIA Trawl Sample ( ESRI REST: Map Service )

Web Service;ESRI REST;fra

File identifier
9bb080d7-2c2d-45ce-8b55-3f0f96da681e XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Parent identifier
Coral and Sponge Concentrations in the Gulf Region of Canada 7b71b73b-0d05-4c61-958d-4beccd1bd3b1
Hierarchy level
dataset; jeuDonnées RI_622
Date stamp
2025-02-04T20:07:07.111Z
Metadata standard name
North American Profile of ISO 19115:2003 - Geographic information - Metadata
Metadata standard version
CAN/CGSB-171.100-2009
RI_408
  Government of Canada; Fisheries and Oceans Canada - Tobias Spears ( Head, Ocean Data and Information Section )
 
 

Overviews

overview
thumbnail
overview
large_thumbnail
overview
thumbnail_fre
overview
large_thumbnail_fre

Spatial extent

N
S
E
W
thumbnail


Keywords


Provided by

logo

Associated resources

Not available


  •  
  •  
  •