Sea Pen and Coral Aggregations in Eastern Canada from Research Vessel Surveys

Polygons identifying concentrations of sea pens, gorgonian corals, and sponges on the east coast of Canada. The data was created through spatial analysis of research vessel survey by-catch data, following a methodology used by the Northwest Atlantic Fisheries Organization. Fisheries and Oceans Canada is the organization responsible for the dataset, which was last updated on 2026-05-08.

Use Cases

• Map vulnerable marine ecosystems based on identified aggregations of sea pens, gorgonian corals, and sponges.
• Assess fishing pressure on long-lived, non-aggregating taxa like black coral using provided tow positions.
• Compare benthic community structures across the five biogeographic zones of eastern Canada mentioned in the description.
• Identify specific habitats like the Laurentian Channel sea pen fields or Scotian Shelf Vazella pourtalesi sponge populations for targeted conservation.

Strengths

• Analysis covers five distinct biogeographic zones of eastern Canada, providing regional context.
• Uses a defined 15 kg minimum catch threshold to separate sea pen field habitat from broader distribution for the Western IIA trawl sample.
• Includes tow positions for both aggregated taxa and non-aggregating, vulnerable species like black coral.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and overall dataset size are unknown, which may limit suitability assessment.
• Data may reflect geographic and methodological bias inherent to research vessel trawl surveys.

Provenance

Source

Fisheries and Oceans Canada

Collection Method

Spatial analysis (kernel density) of by-catch data from research vessel surveys.

Freshness

Last updated 2026-05-08 08:02:22.973995; freshness should be verified.

Geography

East coast of Canada, including the Gulf of St. Lawrence, Eastern Arctic, Labrador continental slope, Scotian Shelf, and Grand Banks.