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River Type Sockeye Salmon (Oncorhynchus nerka) Conservation Units, Sites & Status

A Conservation Unit (CU) is a group of wild Pacific salmon sufficiently isolated from other groups that, if extirpated, is very unlikely to recolonize naturally within an acceptable timeframe, such as a human lifetime or a specified number of salmon generations.

Holtby and Ciruna (2007) provided a framework for aggregating the five species of salmon (genus Oncorhynchus) found on Canada’s Pacific coast into species-specific CUs based on three primary characteristics: ecotypology, life history and genetics. The first stage in the description of the Conservation Units is based solely on ecology. The ecotypologies used in this framework include a combined characterization of both freshwater and near-shore marine environments, and is termed “joint adaptive zone”. The second stage of the description involves the use of life history, molecular genetics, and further ecological characterizations to group and partition the first stage units into the final Conservation Units. The result is CUs that are described through the joint application of all three axes. It is important to note that CUs are distinct from other aggregates of Pacific salmon, such as designatable units (DUs) under the Species at Risk Act or management units (MUs).

CU Counting Sites:

Salmon spawner enumeration data in the Pacific Region is stored and managed in the New Salmon Escapement Database (NuSEDS). The term “escapement” is used to refer to the group of mature salmon that have ‘escaped’ from various sources of exploitation, and returned to freshwater to spawn and reproduce. This data is assigned to a “Counting Site”, which may be a complete watercourse with a marine terminus, a tributary to a larger watercourse, or a defined reach within a watercourse that may or may not encompass the entire population but represents an index of the abundance of that population.

CU Status:

CUs form the basic unit for assessment under Canada’s Policy for the Conservation of Wild Salmon Policy (WSP) (DFO 2005). The biological status of a CU is evaluated using a number of metrics (Holt et al. 2009; Holt 2009), which indicate a WSP status zone: Red (poor status), Amber (marginal status), or Green (healthy status). A final step then incorporates all metric and status-related information into a final integrated status for each CU, along with expert commentary to support the final status determination (e.g., DFO 2012; DFO 2016). This information is used as inputs to fisheries management processes to help prioritize assessment activities and management actions.

Note: CU boundaries were reviewed in 2020-2021 and have been updated from the BC Freshwater Atlas 1:50,000 scale to the BC Freshwater Atlas 1:20,000 scale. The CU boundaries were last updated in March 2023. Please be aware that CUs may be reviewed and are subject to change without notice.

Please refer to Conservation Unit Review Requests-Form and Summary for a list of CU review requests that are ongoing or have been finalized.

Simple

Date ( RI_367 )
2017
Date ( RI_366 )
2007
Date ( RI_368 )
2018-10
Date ( RI_368 )
2019-06
Date ( RI_368 )
2019-12
Date ( RI_368 )
2020-06
Date ( RI_368 )
2021-12
Date ( RI_368 )
2023-10-19
Date ( RI_368 )
2024-01-03
Date ( RI_368 )
2024-03-26
Date ( RI_368 )
2024-11-21
RI_414
  Government of Canada; Fisheries and Oceans Canada; Pacific Science/Ecosystems and Oceans Science/Stock Assessment and Research - Bruce Baxter ( Salmon Escapement Data Technician )
Pacific Biological Station, 3190 Hammond Bay Road , Nanaimo , British Columbia , V9T 6N7 , Canada
1 (250) 756-7279
Presentation form
tableDigital; tableNumérique RI_397
Presentation form
mapDigital;carteNumérique RI_391
Presentation form
imageDigital; imageNumérique RI_389
Status
onGoing; enContinue RI_596
Maintenance and update frequency
asNeeded; auBesoin RI_540
Keywords ( RI_528 )
  • Sockeye Salmon
  • Escapement
  • Conservation Units
  • Wild Salmon Policy
Keywords ( RI_525 )
  • Pacific
  • British Columbia
  • Yukon Territory
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Conservation areas
  • Fisheries management
  • Fisheries
  • Fisheries policy
  • Fish
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
textTable; texteTable RI_637
Metadata language
eng
Character set
utf8; utf8 RI_458
Topic category
  • Biota
  • Environment
  • Inland waters
Begin date
2007-01-01
End date
2023-08-31
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W
thumbnail


Reference system identifier
https://epsg.io / EPSG:4326 / 8.8(9.3.1.2)
Distribution format
  • CSV ( 4 )

    File decompression technique
    ZIP

  • ESRI REST ( 4 )

  • SHP ( 4 )

    File decompression technique
    ZIP

RI_412
  Government of Canada; Fisheries and Oceans Canada; Pacific Science/Ecosystems and Oceans Science/Stock Assessment and Research - Bruce Baxter ( Salmon Escapement Data Technician )
Pacific Biological Station, 3190 Hammond Bay Road , Nanaimo , British Columbia , V9T 6N7 , Canada
1 (250) 756-7279
OnLine resource
Data Dictionary ( HTTPS )

Supporting Document;PDF;eng,fra

OnLine resource
Data Dictionary ( HTTPS )

Supporting Document;XLSX;eng,fra

OnLine resource
Census Sites ( HTTPS )

Supporting Document;CSV;eng

OnLine resource
Census Sites ( HTTPS )

Supporting Document;CSV;fra

OnLine resource
CU Review Request Form (English) ( HTTPS )

Supporting Document;HTML;eng

OnLine resource
CU Review Request Form (French) ( HTTPS )

Supporting Document;HTML;fra

OnLine resource
River Type Sockeye Salmon (Oncorhynchus nerka) Conservation Units, Sites & Status Datasets ( HTTPS )

Dataset;CSV;eng,fra

OnLine resource
RiverType Sockeye Salmon (Oncorhynchus nerka) Conservation Units, Sites & Status Shapefiles ( HTTPS )

Dataset;SHP;eng,fra

OnLine resource
Reference Information ( HTTPS )

Supporting Document;PDF;eng,fra

OnLine resource
Conservation Unit Review Requests – Form and Summary ( HTTPS )

Supporting Document;XLSX;eng,fra

OnLine resource
River Type Sockeye Salmon (Oncorhynchus nerka) Conservation Units, Sites & Status ( ESRI REST: Map Server )

Web Service;ESRI REST;eng

OnLine resource
River Type Sockeye Salmon (Oncorhynchus nerka) Conservation Units, Sites & Status ( ESRI REST: Map Server )

Web Service;ESRI REST;fra

File identifier
6c8bc9b9-5f99-48fc-bd28-3c0af2ec379e XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Parent identifier
Pacific Salmon Conservation Units, Sites & Status 1ac00a39-4770-443d-8a6b-9656c06df6a3
Hierarchy level
dataset; jeuDonnées RI_622
Date stamp
2025-02-04T20:37:29.536Z
Metadata standard name
North American Profile of ISO 19115:2003 - Geographic information - Metadata
Metadata standard version
CAN/CGSB-171.100-2009
RI_414
  Government of Canada; Fisheries and Oceans Canada; Pacific Science/Ecosystems and Oceans Science/Stock Assessment and Research - Bruce Baxter ( Salmon Escapement Data Technician )
Pacific Biological Station, 3190 Hammond Bay Road , Nanaimo , British Columbia , V9T 6N7 , Canada
1 (250) 756-7279
RI_410
  Government of Canada; Fisheries and Oceans Canada; Pacific Science/Ecosystems and Oceans Science/Stock Assessment and Research - Shelee Hamilton ( Head, Fishery & Assessment Data Section )
Pacific Biological Station, 3190 Hammond Bay Road , Nanaimo , British Columbia , V9T 6N7 , Canada
1 (250) 739-9890
Dataset URI
urn:lsid:marinespecies.org:taxname:254569
 
 

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River Type Sockeye Salmon Thumbnail

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Keywords


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