0c359a75-bb20-4603-a447-fa9381c2b088 English HELCOM Secretariat data@helcom.fi 2021-09-09T11:58:23 EPSG:3035 Harbour porpoise distribution (HOLAS 2) 2018 https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/0c359a75-bb20-4603-a447-fa9381c2b088 This map shows the distribution and abundance of harbour porpoise across the Baltic Sea. The abundance of harbour porpoise is presented using 4 abundance classes. The classification is based on expert consultation and information from scientific literature (e.g. Sveegaard et al. 2011, Viquerat et al. 2014). The class borders are defined by expert opinion and generalizing the data gathered and modelled in SAMBAH project. For the Baltic Proper the SAMBAH results have been used to delineate the class borders: 20% probability of detection during May-October has been used to define the area of “common occurrence and reproduction”, and the 20% probability of detection during November-April has been used to define the “regular occurrence, no regular reproduction” area. Please note: The applied spatial scale includes lagoons and estuaries of the inner coastal waters (e.g. Szczecin Lagoon, Jasmund lagoon) where harbour porpoises do not or only exceptionally occur unlike the map suggests. HELCOM Secretariat data@helcom.fi Species distribution Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme marine ecology marine mammal GEMET 2018-08-16 geonetwork.thesaurus.external.theme.gemet-en MADS HOLAS2 ecosystem component Biodiversity Use constraints: TBC Access constraints: No limitations on public access. English environment biota 7.530495 34.131647 52.277123 66.475422 2011-01-01 2016-12-31 TIFF https://maps.helcom.fi/website/MADS/download/?id=0c359a75-bb20-4603-a447-fa9381c2b088 WWW:LINK-1.0-http--link Download dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Data source: SAMBAH data kindly provided by SAMBAH project partners. Project report available at: http://www.sambah.org/Docs/General/Non-technical-report-v.-1.8.2.pdf. Please note: There is no secured knowledge about the reproduction in Schleswig-Holstein waters. References: Sveegaard, S., Teilmann, J., Tougaard, J., Dietz, R., Mouritsen, K.N., Desportes, G., Siebert, U., 2011. High-density areas for harbour porpoise (Phocoena phocoena) identified by satellite tracking. Marine Mammal Science 27(1):230-246. Viquerat, S., Herr, H., Gilles, A., Peschko, V., Siebert, U., Sveegaard, S., Teilmann, J., 2014: Abundance of harbour porpoise (Phocoena phocoena) in the western Baltic, Belt Seas and Kattegat. Marine Biology 161:745-754. Data quality: The map is based on the SAMBAH dataset and expert consultation. It gives a rough estimate on the abundance of harbour porpoise in the Baltic Sea. Attribute information: Raster representing abundance classes with following values 1 = Common occurrence and reproduction 0.75 = Regular occurrence, regular reproduction 0.5 = Regular occurrence 0.25 = Rare occurrence