British Columbia Chinook Salmon Conservation Units and Status Assessments

This dataset defines Conservation Units (CUs) for Southern British Columbia Chinook salmon, which are groups isolated enough that extirpation would prevent natural recolonization. It includes CU boundaries, associated counting sites for spawner escapement data, and WSP status zone assessments (Red, Amber, Green). The dataset was last updated in March 2023.

Use Cases

• Map Conservation Unit boundaries to analyze spatial isolation and habitat characteristics for population management.
• Assess the biological status of CUs by examining assigned WSP status zones (Red, Amber, Green) and supporting expert commentary.
• Link CU definitions to spawner enumeration data from counting sites stored in the New Salmon Escapement Database (NuSEDS).
• Prioritize fisheries management actions by integrating CU status assessments with metrics on ecotypology, life history, and genetics.

Strengths

• CU boundaries are defined using a multi-axis framework incorporating ecotypology, life history, and genetics.
• Boundary data was updated in March 2023 and refined from a 1:50,000 scale to a more detailed 1:20,000 scale BC Freshwater Atlas.
• Status assessments provide integrated biological evaluations using the Wild Salmon Policy's Red, Amber, Green zone system.

Limitations

• The dataset does not contain the underlying raw spawner count or escapement data, only the CU and site definitions.
• CU boundaries and definitions are subject to review and may change without notice, as noted in the documentation.
• Sample data and specific row/column counts for the provided file formats (SHP, CSV, XLSX) are unavailable for review.

Provenance

Source

Fisheries and Oceans Canada.

Collection Method

CUs are defined using a framework from Holtby and Ciruna (2007) based on ecotypology, life history, and genetics; status is assessed using WSP metrics.

Time Range

null

Freshness

Last updated March 2023, with a noted review period in 2020-2021.

Geography

Southern British Columbia, Canada's Pacific coast.