Sablefish Offshore Stratified Random Trap Survey Data

Fisheries and Oceans Canada provides fishing event and biological data from the annual Sablefish Offshore Stratified Random Survey on the British Columbia coast, conducted since 2003. The survey employs a stratified random design across five spatial and three depth strata for a total of 15 strata. Data tables include effort, catch, biological information, the sampling frame, and a calculated coastwide biomass index.

Use Cases

• Analyze catch rates and effort data across the 15 spatial and depth strata (S1-S5, RD1-RD3) to assess population distribution.
• Model the relationship between soak time, number of traps deployed, and catch composition for fishery-independent stock assessment.
• Calculate the coastwide Sablefish biomass index using the provided standardized catch and effort metrics.
• Map fishing event locations and depths to study habitat use and spatial patterns in the survey area.

Strengths

• Survey employs a standardized, depth and area stratified random sampling design across 15 distinct strata.
• Provides long-term continuity with data collected annually since 2003.
• Includes multiple integrated data components: effort, catch, biological information, sampling frame, and a biomass index.

Limitations

• The specific row count and column schema are not provided, limiting pre-analysis assessment of data volume and structure.
• Data is part of a multi-component survey; two other historical survey components are noted as not available on this platform.
• Sample data is unavailable, preventing verification of data format and content before access.

Provenance

Source

Fisheries and Oceans Canada

Collection Method

Annual fishery-independent research survey using longline trap gear, following a stratified random sampling design documented in technical reports.

Time Range

2003 to present

Freshness

null

Geography

British Columbia coast, partitioned into five spatial strata from South West Coast Vancouver Island to North West Coast of Haida Gwaii.