HELCOM Metadata catalogue
Abundance of salmon spawners and smolt HOLAS 3
This indicator evaluates the status of the Baltic Sea area 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:
“SB_Code” = Code of the Helcom subbasin
"Name" = Name of the Helcom scale 2 assessment unit
"AREAKM2" = Area of the Helcom scale 2 assessment unit
HELCOM_ID = Helcom id of the Helcom scale 2 assessment unit
ICES_AU = ICES assessment unit number
Threshold = Threshold
Threshold_v = Threshold value for this indicator
"Ind_value" = Value for the indicator in Helcom scale 2 assessment unit
Status = Status of the indicator (“Good”, “Not good” or “Not assessed”)
comment = additional info
Simple
- Date (Creation)
- 2023-03-16
- Unique resource identifier
- https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/ab88bcde-9bd4-4f1d-818d-c4d01ae62f76
-
GEMET - INSPIRE themes, version 1.0
-
-
Habitats and biotopes
-
-
GEMET
-
-
fish
-
spawning ground
-
- Keywords
-
-
MADS
-
HOLAS3
-
Core indicator
-
- Use constraints
- Other restrictions
- Other constraints
-
Use constraints: Data can be used freely given that the source is cited (following creative commons license CC-BY). The source should be cited as: “HELCOM HOLAS 3 Dataset (2023)"
- Access constraints
- Other restrictions
- Other constraints
- Access constraints: No limitations on public access.
- Spatial representation type
- Vector
- Metadata language
- English
- Topic category
-
- Environment
))
- Begin date
- 2016-01-01 Unknown
- End date
- 2021-12-31 Now
- Unique resource identifier
- EPSG:3035
- Distribution format
-
-
ESRI Shapefile
(
1.0
)
-
ESRI Shapefile
(
1.0
)
- OnLine resource
- Download Abundance of salmon spawners and smolt HOLAS 3 ( WWW:LINK-1.0-http--link )
- OnLine resource
- View Abundance of salmon spawners and smolt HOLAS 3 ( WWW:LINK-1.0-http--link )
- Hierarchy level
- Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
-
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 info: http://helcom.fi/baltic-sea-trends/indicators/zooplankton-mean-size-and-total-stock/
Link to metadata of dataset used for indicator calculation: https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/01eeaf94-6308-44e3-8a25-330dc941821f
- File identifier
- ab88bcde-9bd4-4f1d-818d-c4d01ae62f76 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2023-04-14T14:02:56
Overviews
Spatial extent
Provided by
