HELCOM Metadata catalogue
Abundance of sea trout spawners and parr 2018
This core indicator evaluates the status of coastal sea areas of the Baltic Sea based on the abundance of sea trout parr in rivers where they breed. The determination of whether good status is reached is based on a comparison of the observed parr densities in rearing habitats with the reference potential parr densities in the specified habitats.
This dataset displays the result of the indicator in HELCOM Assessment Scale 3 (Division of the Baltic Sea into 17 sub-basins and further division into coastal and offshore areas).
Attribute information:
"HELCOM_ID" = ID of the HELCOM scale 3 assessment unit
"level_2" = Name of the HELCOM scale 2 assessment unit
"level_3" = Name of HELCOM scale 3 assessment unit
"ICES Subdivision" = ICES assessment unit number
"Area (km2)" = Area of the HELCOM scale 3 assessment unit
"Indicator_" = Name of the indicator
"Unit" = Unit of the indicator
"Type" = 1 = boundary values increase/decrease monotonically, 2 = optimum range indicator
"Status" = Status of the indicator (“Achieve”, “Fail” or “Not assessed”)
"ConfA" = Confidence of classification
"ConfT" = Temporal confidence of classification
"ConfS" = Spatial confidence of classification
"ConfM" = Methodological confidence of classification
"notes" = additional info
"AULEVEL" = Assessment unit level used for the indicator
Simple
- Date (Publication)
- 2018-06-28
- Unique resource identifier
- https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/11de8f68-146a-4235-815c-afbe825d1505
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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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fish
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spawning ground
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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 sea trout spawners and parr. 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
)
- 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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In total, data was available from 240 sites in about 120 streams and rivers for period 2012-2014. ICES subdivisions 21 to 32 are represented. At least ten sites are included from each of the ICES sub-divisions 25, 27,
30, 31 and 32.
The Baltic assessment model focuses on the state of recruitment, which is defined as the observed
recruitment (i.e. observed densities) compared to the potential reference recruitment (i.e. maximal densities
that could be expected under the given habitat conditions). The model uses electrofishing data of the
individual sea trout populations, together with habitat information collected at the same sites, to calculate
the trend in population development over time. The examination of the data is site-specific (several sites can
exist in one river) but the evaluation of the state of the stock can be concluded on the river level and also at
a sub-area level. Average values of recruitment state are calculated for assessment areas, sub-divisions, and,
where more countries have streams in one sub-division, for each individual countries (ICES 2011; ICES 2017).
At the annual meetings of the International Council for the Exploration of the Seas Baltic Salmon and Trout
Assessment Working Group (ICES WGBAST), all available data from the Baltic countries on estimated
abundance of sea trout parr (per 100 m2
) from individual sites are compiled. In 2017, data was available from
a total of 257 sites in about 132 streams, which reflects the general situation of data availability.
Additional information:
http://www.helcom.fi/baltic-sea-trends/indicators/abundance-of-sea-trout-spawners-and-parr/
Link to metadata of dataset used for indicator calculation:
- File identifier
- 11de8f68-146a-4235-815c-afbe825d1505 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2021-09-09T11:59:47
Overviews
Spatial extent
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