HELCOM Metadata catalogue
Perch recruitment areas
The occurrence of suitable nursery habitats is crucial for maintaining fish populations (Sundblad et al. 2013). For perch, species distribution modelling studies (Snickars et al. 2010, Bergström et al. 2013, Sundblad et al. 2013) have shown the importance of suitable environmental conditions for reproduction. Due to lack of coherent data on perch spawning and nursery areas across the Baltic Sea countries, environmental variables were used in delineating potential recruitment areas for perch. The distribution area or perch recruitment is delineated by selecting areas where depth < 4 m (For Danish waters < 3 m), logged exposure < 5 (exposure model described in Isæus 2004), and salinity < 10 PSU. The threshold values have been obtained from literature (Snickars et al. 2010, Bergström et al. 2013, Skovrind et al. 2013, Sundblad et al. 2013). Relatively “loose” thresholds have been used, to rather overestimate than underestimate the recruitment area (precautionary approach).
Along the Finnish coastline a national model has been used (Kallasvuo et al. 2016), with suitable environments for perch recruitment generalized to 1 km x 1 km grid.
Simple
- Date (Creation)
- 2016-04-06
- Unique resource identifier
- https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/3f8fc3c7-e5f2-4f67-a0ae-cbdfea01f2f7
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GEMET - INSPIRE themes, version 1.0
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Species distribution
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Habitats and biotopes
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GEMET
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fish
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marine ecology
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- Keywords
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MADS
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HOLAS2
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ecosystem component
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- Use constraints
- Other restrictions
- Other constraints
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Use constraints: Data can be used freely given that the source is cited as "HELCOM HOLAS II Dataset: Perch recruitment area (2017)".
- Access constraints
- Other restrictions
- Other constraints
- Access constraints: No limitations on public access.
- Spatial representation type
- Grid
- Metadata language
- English
- Topic category
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- Environment
- Biota
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- Begin date
- 2011-01-01
- End date
- 2014-12-31
- Unique resource identifier
- EPSG:3035
- Distribution format
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TIFF
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TIFF
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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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Data source:
Depth: Baltic Sea Bathymetry database ( http://data.bshc.pro/#2/51.8/20.1), complemented in some coastal areas with IOW bathymetry data (Seifert et al. 2001).
Wave exposure: Wave Impact Index calculated for the whole Baltic Sea (Isaeus 2004)
Salinity: Monthly means of May for years 2011-2014 downloaded from Copernicus Marine Environment Monitoring Service ( http://marine.copernicus.eu). Reanalysis products of SMHI for years 1989-2004, 5.5km grid cells. A May mean for 2011-2014 was calculated. Extrapolation to some coastal areas (that were outside the original data due to low resolution of the grid) was carried out.
References:
Bergström, U., Sundblad, G., Downie, A-L., Snickars, M., Boström, C., Lindegarth, M. 2013. Evaluating eutrophication management scenarios in the Baltic Sea using species distribution modelling. Journal of Applied Ecology 2013, 50, 680-690.
Isæus, M., 2004. Factors structuring Fucus communities at open and complex coastlines in the Baltic Sea. PhD thesis, Stockholm University.
Kallasvuo, M., Vanhatalo, J., Veneranta, L.: Modeling the spatial distribution of larval fish abundance provides essential information for management. Accepted manuscript.
Seifert, T., Tauber, F., Kayser, B. 2001. A high resolution spherical grid topography of the Baltic Sea – 2nd edition. Baltic sea Science Congress, Stockholm 25-29 November 2001, Poster #147.
Skovrind, M., Christensen E.A.F., Carl, C., Jacobsen, L., Moller, P.R. 2013. Marine spawning sites of Perca fluviatilis revealed by oviduct-inserted acoustic transmitters. Aquatic Biology 19: 201-206.
Snickars M., Sundblad G., Sandström A., Ljunggren L., Bergström U., Johansson G. & Mattila J. 2010. Habitat selectivity of substrate spawning fish - modelling requirements of the Eurasian perch, Perca fluviatilis. Marine Ecology Progress Series 398: 235-243.
Sundblad, G., Bergström, U., Sandström, A., and Eklöv, P. 2013. Nursery habitat availability limits adult stock sizes of predatory coastal fish. – ICES Journal of Marine Science.
Data quality:
The map is based on literature and environmental variables, not actual data. Also the data layers on environmental variables are based on modelling. The species distribution modelling studies, where the thresholds values for environmental variables have been obtained, are mainly from the northern Baltic Sea. Here, the same thresholds have been applied in the southern Baltic. Due to these constraints, the perch recruitment area map should be considered as a rough estimation.
The dataset was approved by all HELCOM Contracting Parties in the HOLAS II Ecosystem component data review process during first quarter of 2017 after corrections from Denmark.
Attribute information: Raster value representing the potential occurrence of perch recruitment area (either 0 or 1).
- File identifier
- 3f8fc3c7-e5f2-4f67-a0ae-cbdfea01f2f7 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2021-09-09T11:58:17
Overviews
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