HELCOM Metadata catalogue
Abundance of salmon spawners and smolt 2018
This indicator evaluates the status of the abundance of salmon spawners and smolt in the Baltic Sea based on salmon smolt production in rivers flowing into the sea, also making use of additional supporting data on numbers of adult spawners. Determination of whether the threshold value that determines good status is achieved is based on a comparison of estimated smolt production with an estimated potential smolt production capacity.
This dataset displays the result of the indicator in HELCOM Assessment Scale 2 (Division of the Baltic Sea into 17 sub-basins).
Attribute information:
"HELCOM_ID" = ID of the HELCOM scale 2 assessment unit
"Subbasin code" = Code of the HELCOM subbasin
"Name" = Name of the HELCOM scale 2 assessment unit
"ICES_AU" = ICES assessment unit number
"Threshold" = Threshold for good status (75% of potential smolt production capacity (PSPC))
"Threshold value" = Threshold value for the assessment unit
"Indicator value" = Indicator result value 2016 for HELCOM scale 2 assessment unit
"Status" = Status of the indicator (“Achieve”, “Fail” or “Not assessed”)
"Comment" = Additional info
"Area (km2)" = Area of the HELCOM scale 2 assessment unit
"AULEVEL" = Assessment unit level used for the indicator
"indicato_1" = Indicator result value 2011-2016
"ConfA" = Confidence of classification
"ConfT" = Temporal confidence of classification
"ConfS" = Spatial confidence of classification
"ConfM" = Methodological confidence of classification
Simple
- Date (Publication)
- 2018-06-28
- Unique resource identifier
- https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/89a26c4a-7855-4c6b-9bf9-2fe11e9727bc
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GEMET - INSPIRE themes, version 1.0
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Habitats and biotopes
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GEMET
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spawning ground
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fish
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- Keywords
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MADS
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HOLAS2 2018 Core indicator
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Core indicator
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- Use constraints
- Other restrictions
- Other constraints
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Use constraints: The data and resulting data products (tables, figures and maps) available on the indicator web pages can be used freely given that the source is cited. The indicator should be cited as following: HELCOM (2018) Abundance of salmon spawners and smolt. HELCOM core indicator report. Online. [Date Viewed], [Web link]
- Access constraints
- Other restrictions
- Other constraints
- Access constraints: No limitations on public access.
- Spatial representation type
- Vector
- Metadata language
- English
- Topic category
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- Environment
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- Begin date
- 2011-01-01
- End date
- 2016-12-31
- Unique resource identifier
- EPSG:3035
- Distribution format
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ESRI Shapefile
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1.0
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ESRI Shapefile
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1.0
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- OnLine resource
- Download dataset ( WWW:LINK-1.0-http--link )
- OnLine resource
- Open in Map Viewer ( WWW:LINK-1.0-http--link )
- Hierarchy level
- Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
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The data on salmon smolt production, number of spawners and other data from national monitoring is brought by the national representatives to the annual meeting of the ICES Working Group for Baltic Sea Salmon and Sea Trout (WGBAST). The data is documented in the reports of the group and forms the basis on which the model for salmon smolt production is run. There is currently no common database. The stock data from Kattegat originates from the HELCOM SALAR project report (HELCOM 2011).
River surveys include parr density estimates, smolt trapping, monitoring of spawning runs and river catches. Sea surveys include catch data, fishing effort data and catch composition estimates. Joint river and sea surveys include tagging data (tagging in rivers, recaptures from sea and river fishery).
Monitoring data from each river are annually collated and processed so that updated estimates of smolt production and potential smolt production capacity (PSPC) are obtained. The procedure for obtaining the PSPC is described e.g. in ICES 2015.
The Baltic salmon river stocks are divided into six evaluation areas based on the biological and genetic characteristics of the stocks and associated management objectives (see Assessment protocol figure 1). Stocks of a particular evaluation area are assumed to exhibit similar migration patterns and to be subjected to the same fisheries, experience the same exploitation rates and be affected by management in the same ways. In addition, the genetic variability between stocks of an evaluation area is smaller than the genetic variability between stocks of different areas.
The level of confidence of the evaluation is moderate.
Additional information:
http://www.helcom.fi/baltic-sea-trends/indicators/abundance-of-salmon-spawners-and-smolt/
Link to metadata of dataset used for indicator calculation:
- File identifier
- 89a26c4a-7855-4c6b-9bf9-2fe11e9727bc XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2021-09-09T11:59:17
Overviews
Spatial extent
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