HELCOM Metadata catalogue
Pikeperch recruitment areas
The occurrence of suitable nursery habitats is crucial for maintaining fish populations (Sundblad et al. 2013). Species distribution modelling studies have shown the importance of suitable environmental conditions for pikeperch recruitment. Due to lack of coherent data on pikeperch spawning and nursery areas across the Baltic Sea countries, environmental variables were used in delineating potential recruitment areas for pikeperch.
The pikeperch recruitment area presented on the map is mainly delineated by selecting areas where depth < 5 m, logged exposure < 5, salinity < 7 PSU, Secchi depth < 2 m and distance to deep (10m) water < 4km. The threshold values have been obtained from literature (Veneranta et al. 2011, Bergström et al. 2013, Sundblad et al. 2013, Kallasvuo et al. 2016). Temperature, although important for pikeperch, was left out due to high variation in timing of suitable spawning temperatures across the Baltic Sea. In Finnish coastal waters, a national pikeperch model (Kallasvuo et al. 2016) has been used, with very suitable areas for pikeperch generalized to 1 km grid. In Sweden, the areas delineated by environmental variables have been complemented with information from national interview survey (Gunnartz et al. 2011) as well as expert opinion.
Simple
- Date (Creation)
- 2016-04-06
- Unique resource identifier
- https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/7d6508ec-164e-4b65-b170-2074c2eec599
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GEMET - INSPIRE themes, version 1.0
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Habitats and biotopes
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Species distribution
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GEMET
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marine ecology
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fish
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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: Pikeperch recruitment areas (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 (Isæus 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.
Secchi depth: Satellite based (MERIS) composite layer of May 2011, kindly provided by Krista Alikas at Tartu Observatory, Estonia (Alikas & Kratzer, submitted).
References:
Alikas, K., Kratzer, S. Improved retrieval of Secchi depth for optically-complex waters using remote sensing data, submitted manuscript.
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.
Gunnartz, U., Lif, M., Lindberg, P., Ljundgren, L., Sandström, A., Sundblad, G., 2011: Kartläggning av fisk lekområden för kommersiella fiskarter längs den Svenska östkusten – en intervjustudie. Finfo 2011:3.
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.
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.
Veneranta, L. Urho, L., Lappalainen, A., Kallasvuo, M., 2011. Turbidity characterizes reproduction areas of pikeperch (Sander lucioperca (L.)) in the northern Baltic Sea. Estuarine, Coastal and Shelf Science 95:199-206.
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 from the northern Baltic Sea. Here, same thresholds have been applied in the southern Baltic. Due to these constraints, the pikeperch 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.
Attribute information: Raster value representing the potential occurrence of pikeperch reproduction area (either 0 or 1).
- File identifier
- 7d6508ec-164e-4b65-b170-2074c2eec599 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2021-09-09T11:58:10
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